CA1072058A - Ball point pen tip with supporting seat press fitted into corners of ball receiving hole - Google Patents
Ball point pen tip with supporting seat press fitted into corners of ball receiving holeInfo
- Publication number
- CA1072058A CA1072058A CA274,269A CA274269A CA1072058A CA 1072058 A CA1072058 A CA 1072058A CA 274269 A CA274269 A CA 274269A CA 1072058 A CA1072058 A CA 1072058A
- Authority
- CA
- Canada
- Prior art keywords
- ball
- receiving hole
- supporting seat
- recess
- ball receiving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K1/00—Nibs; Writing-points
- B43K1/08—Nibs; Writing-points with ball points; Balls or ball beds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49833—Punching, piercing or reaming part by surface of second part
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/4984—Retaining clearance for motion between assembled parts
- Y10T29/49845—Retaining clearance for motion between assembled parts by deforming interlock
- Y10T29/49853—Retaining clearance for motion between assembled parts by deforming interlock of sphere, i.e., ball, in socket
- Y10T29/49854—Ball point pen making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49861—Sizing mating parts during final positional association
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49908—Joining by deforming
- Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body
Abstract
ABSTRACT OF THE DISCLOSURE
.
In a tip for a ball point pen including a cylindrical metallic tip body having a pointed end, a ball receiving hole having its opening at the pointed end of the tip body j a ball supporting seat of a plastics held in the bottom of the ball receiving hole, a bore for delivering ink to the ball receiving hole through the ball supporting seat and having its open-ing at the end of the tip body opposite to the pointed end, and a ball rotatably received within the ball receiving hole and supported on the seat, there is provided an improvement comprising a recess formed in the bottom surface of the ball receiving hole, the recess having at least one angular portion, the ball supporting seat being deformed to fill all the corners of the bottom of the hole including the recess, thereby pre-venting the ball supporting seat from planely rotating on the bottom surface of the ball receiving hole. Further, by forming at least one protrusion in the vicinity of the upper edge around the recess, the plane rotation and the axial movement of the ball supporting seat can be prevented.
There is also provided a method of making such an improved tip for a ball point pen.
.
In a tip for a ball point pen including a cylindrical metallic tip body having a pointed end, a ball receiving hole having its opening at the pointed end of the tip body j a ball supporting seat of a plastics held in the bottom of the ball receiving hole, a bore for delivering ink to the ball receiving hole through the ball supporting seat and having its open-ing at the end of the tip body opposite to the pointed end, and a ball rotatably received within the ball receiving hole and supported on the seat, there is provided an improvement comprising a recess formed in the bottom surface of the ball receiving hole, the recess having at least one angular portion, the ball supporting seat being deformed to fill all the corners of the bottom of the hole including the recess, thereby pre-venting the ball supporting seat from planely rotating on the bottom surface of the ball receiving hole. Further, by forming at least one protrusion in the vicinity of the upper edge around the recess, the plane rotation and the axial movement of the ball supporting seat can be prevented.
There is also provided a method of making such an improved tip for a ball point pen.
Description
' ~ ' ' ' ~ : " ' ' ' ' ' 1 ~07Z~58 BACKGROUND OF THE INVENTION
The present invention relates to a tip of a ball point pen and, more particularly, to a writing tip including a ball rotatably received by a ball supporting seat of a plastics held within a ball rece-iving hole of a metallic tip body and to a method of making the same.
With the recent increase of the use of aqueous ink instead of oil ink, it b~comes inevitably essential to use a ball supporting seat which is made of a plastics and precisely held in a ball receiving hole drilled at one end of a metallic tip body. When aqueous ink is applied to a ball point pen wherein the ball is directly supported by a bottom sur-face of the ball receiving hole, a breakage of thin film of the aqueous ink formed on the ball surface easily occurs by a writing pressure, due to ;~
relatively low viscosity of aqueous ink compared with that of oil ink, to cause unfavourable noise and to deteriorate the wear-resistance of the -~
ball and -the ball supportmg surface. Such drawbacks are avoided by using the ball supporting seat of plastics which can exert a certain elasticity .
The size of the ball used in current popular ball point pens is in general 1.0 mm, and is typically 0.5 mm or less in those pens for writing extremely thin line. Therefore, the ball supporting seat of plastics must be correspondingly very small in size and very thin in thickness. At the same time, the seat must be firmly secured in the ball receiving hole of the tip body so as not to be moved, in order to ensure a smooth rotation of the ball.
Although an effort has been made to firmly secured the ball supporting seat within the ball receiving hole by using an adhesive, such a way of solution has been found inconvenient in that an excessive adhesive causes a clogging of ink flowing passage such as an ink guiding groove, while the mechanical bonding strength obtained thereby is not so large.
The present invention relates to a tip of a ball point pen and, more particularly, to a writing tip including a ball rotatably received by a ball supporting seat of a plastics held within a ball rece-iving hole of a metallic tip body and to a method of making the same.
With the recent increase of the use of aqueous ink instead of oil ink, it b~comes inevitably essential to use a ball supporting seat which is made of a plastics and precisely held in a ball receiving hole drilled at one end of a metallic tip body. When aqueous ink is applied to a ball point pen wherein the ball is directly supported by a bottom sur-face of the ball receiving hole, a breakage of thin film of the aqueous ink formed on the ball surface easily occurs by a writing pressure, due to ;~
relatively low viscosity of aqueous ink compared with that of oil ink, to cause unfavourable noise and to deteriorate the wear-resistance of the -~
ball and -the ball supportmg surface. Such drawbacks are avoided by using the ball supporting seat of plastics which can exert a certain elasticity .
The size of the ball used in current popular ball point pens is in general 1.0 mm, and is typically 0.5 mm or less in those pens for writing extremely thin line. Therefore, the ball supporting seat of plastics must be correspondingly very small in size and very thin in thickness. At the same time, the seat must be firmly secured in the ball receiving hole of the tip body so as not to be moved, in order to ensure a smooth rotation of the ball.
Although an effort has been made to firmly secured the ball supporting seat within the ball receiving hole by using an adhesive, such a way of solution has been found inconvenient in that an excessive adhesive causes a clogging of ink flowing passage such as an ink guiding groove, while the mechanical bonding strength obtained thereby is not so large.
2 ~
~6~7;~058 In addition, it is quite difficult to insert the prefabricated supporting seat into the ball receiving hole, which makes the mass-production of the ball point pen difficult and troublesome.
SUMMARY O~ THE INVE~NTION
It is therefore an object of the present invention to provide a ball point pen in which the ball supporting seat can be firmly secured in position by seat-retaining means provided in the ball receiving hole of the tip body to thereby prevent the plane rotation and/or the axial movement of the seat held in the ball receiving hole It is another object of the present invention to provide a method of making a tip for a ball point pen in which the formation of seat-retaining means in the ball receiving hoie and the enga8ement of the means with the ball supporting seat, as well as the insertion of the seat into the ball receiving hole are simply and effectively accomplished. ~
In a prior art tip for a ball point pen, there is included a cylindrical metallic tip body having a pointed end, a ball receiving hole having its opening at the pointed end of the tip, a ball supporting seat of a plastics held in the bottom of the ball receiving hole, a bore for deliver-ing inl~ to the ball receiving hole through the ball supporting seat and having its opening at the end of the tip body opposit.e to the pointed end.
A ball is rotatably received within the ball receiving hole and supported on the seat.
According to the improvement of the present invention, there is provided a recess formed in the bottom surface of the ball receiv-ing hole. The recess should have at least one angular portion, and the ball supporting seat made of plastics is deformed to fill all the corners of the bottom of the hole including the recess, thereby preventing the ball supporting seat from planely rotating on the bottom surface of the ball receivlng hole.
3_ ,:
7z~5~3 In the case when both the plane rotation and the axial movement require to be prevented, at least one protrusion may further be formed in the vicinity of the upper edge around the recess~ The ball supporting seat made of plastics is also deformed to fill all the corners of the bottom of the hole including the recess and behind the protrusion due to the plastic deformation. A recess in a circular form without any angular portion may be used when the recess and the protru-sion are both provided.
Such recess and protrusion can be easily provided accord-ing to the method of the present invention. Namely, the bottom surface of the ball receiving hole is hitted and depressed by means of the hammer-ing action of a tool to thereby form a recess corresponding to the profile of the tool. The protrusion can be provided by using a hammering tool having at least one portion adapted to abut the upper edge around the recess. This tool hammers and depresses the abutted portion to thereby form protrusion due to the reactionary deformation in the vicini~y of the upper ed8e of the recess.
In the method of the present invention, the insertion of the ball supporting seat can be easily and conveniently inserted into the bottom of the ball receiving hole, and firmly retained in position. The pointed end of the tip body is pressed strongly onto a sheet of a plastics constituting the ball supporting seat to cut out a portion of the plastics and transfer the portion of the plastics to the opening of the ball receiving hole. Thè thus cut out portion of the plastics is then forced deep into the bottom of the hole adapted to deform the portion to fill all the corners of the bottom of the hole including the recess and even behind the protrusion .
In order to form an ink guiding groove communicating the ball receiving hole and-~he ink delivering bore through the ball supporting seat, both a portlon of the seat and the bottom of the hole are punched at a time by using a punching cutter blade.
- 4- ~;
~Z0S8 On the upper surface of the ball supporting seat is prefer-ably formed a curved depression as a ball supporting surface, on which the ball is rotatably seated.
The present invention will become more clear from the folls:~wing description of preferred embodiments taken in conjunction with the accompanying drawings. Like numerals refer to like parts throughout.
'` ' ' '~.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 i5 a sectional view of the tip body used in the present invention;
' ' . ' Fig. 2 is a sectional view showing forming a recess in the bottom surface of the ball receiving hole of the tip body;
Figs. 3a to 3d are plane views of the bottom surface of the ~!
ball receiving hole in which depressions of various shapes have been formed;
Fig. 4 is a sectional view showing ~rming protrusions;
... : ...... ~ . . :
Figs. 5 and 6 show conf1gurations of protrusions formed at . . . .
the upper edge of a circular recess by usin~g a tool with a triangular and a square profile, respectively ;
.
Fig. 7 is a sectional view showing cutting a sheet of plastics constituting the ball supporting seat by usin~ the pointed end of the tip body;
Fig. 8 is a sectional view showing forcing the cut out ball supporting seat into the bottom of the ball receiving hole;
Fig. 9 1S a sect1onal Yiew showing forming a curved depres-sion on the upper surface of the seat;
Fig. 10 is a sectional v1ew showing punching the bottom of the ball receiving hole by using a punching cutter blade to form the ink guiding groove;
~'~
- 5~ `
2~8 ~
Fig. 11 is a perspective view of a preferred shape of 1he punching cutter blade;
Fig 12 is a sectional view taken along line A-A of Fig. 10;
and Fig. 13 is a sectional view of the tip for a ball point pen completely assembled.
DETAILEI) DESCRIPTION OF
THE PREFERRED EMBODIMENT
Referring now to Fig. 1, a tip body 1 used in the present invention is made of a rod-like cylindrical metallic material, e.g.
stainless steel, having high corrosion and wear-resistant properties.
The metallic material is first subjected to milling to form a frusto-conical shape, and after drilling a ball receiving hole 2 at one end of the cylind~
rical metallic material, the material is cut to a predetermined length required for manufacturing the ~ip bod~ 1. Then a bore 3 for inserting a core, which delivers ink from a ink reservoir (not shown), is bored in the metaIlic material at the other end thereof to complete the tip body 1 having a pointed end 5. The thickness of the annular wall of the pointed end opening is typically about 0.03 mm.
It is preferred, in the present invention, to form a narrow passage 4 communicating the ball receiving hole 2 with the bore 3. Such ~ -communicating passage 4 can be formed, for example, by drilling simul-taneous with drilling the hole 2. The function of the communicating passage 4 will be understood from the explanation hereinafter described.
In general, as a result of the profile of the drill used in the drilling step mentioned above, a conical inclined surface 6 is formed at the bottom of the hole 2. According to the present invention, a recess 7 is ~ormed in this bottom surface 6, remaining a portion of the bottom surface 6 m the vicinity of the circumference thereof unrecessed (Fig. 2).
~ 7Z058 The recess may be Pormed, after drilling the hole 2, by using a hammering tool 20, as shown in Fig. 2. Namely, the tool 20 is inserted into the previously drilled hole 2 so that the head portion of the tool 20 hammers and depresses the bottom surface 6 to form the recess portion 7 corres-ponding to the profile of the tool 20. ;
By forming such recess 7 in the bottom surface 6 of thehole 2, the plane rotation of a ball supporting seat of plastics, which is .
to be inserted and closely filled in the bottom part of the hole 2 including ;
the recess part by the operational s$eps hereinafter described, is effec-tivly obstructed. Since the plane rotation of the seat is considered to accidentally cause clogging the passage way of ink during the use of the ball point pen, the obstraction of such rotation is necessary. In order :~
to obtain the effective obstruction of the rotation, the recess 7 is prefer-ably formed to have at least one angular portion, rather than a circular , recess which cannot provide the effect to resist to the plane rotation of the ball supporting seat.
: .
The recess may be, for instance, a triangular depression 7a in Fig. 3a, a square depression 7b~in Fig. 3b, a square depression having its cen$ral portion remained undepressed 7c in Fig. 3c, or a circular depression 7d having its circumference a plurality of outward projections in Fig. 3d. However, in the case when protrusions are formed in portions close to the upper edge around the recess 7 in the opera~ional step described below, the recess 7 and, accordingly, the head proPile oP tool 20 may be circular without any angular portion. when the recess may be circular in shape, then it may be formed with simul-taneously with the drillmg of the balI receiving hole 2.
In order to obtain seat-retaining means by which more complete retainin~ effect, especially the axial movement of the ball receiving sea$, can be accomplished, it is preferred to perform a pro-$rusion-forming s$ep after the recess-forming step abo~e described.
'~.
lL~721358 In the protrusion-f~rmin~ step, another hammering tool 21 is inserted in the ball receiving hole 2. This tool 21 is different from the tool 20 in that the peripheral edge of the head of the tool 21 has corners 22 adap-ted to abut the inclined conical surface 6 around the recess 7. As the head of the tool 21 strikes and presses the surface 6 around the recess 7, the portions of the surface 6 abutted by the corners 22 o~ the tool 21 are collapsed to form indentations 10 on the remaining unrecesse~ surface 6, and the reactionary deformation in the form oî
inward protrusions 8 is simultaneously produced in plural portions close to the upper ~edge 9 around the recess 7, as wlll be seen from Fig. 4.
Figs. 5 and 6 show configurations of protrusions 8 formed by using, for example, a triangular and a square head prophils of the tools 21, respectively, over a circular recess 7. Althoughneglected from the drawings, it will be ~apparently understood that the recess - : , .
having angùlar portions, as exemplified by 7a, 7b, 7c, or 7d, may be well eoorperated by the tool 21 havmg a head profile of circular or angular, to form~ slmllar protrusions and indentahons. ~ -The indentations 10 are effective, as well as the recess 7, to prevent the plane rotation of the ball supporting seat.
~With the thus processed tip body 1, the next operational step is undertaken as in Fig. 7, wherein the pointed end 5 of the tip - `
body 1 is pressed strongly onto a sheet 11 of a material constituting the ball supporting seat, and~is pulled in one direction to cut the sheet as ~ --if the pointed end 5 is a cutting knife~ Alternatively, the sheet of plastics 11 may be pressed against the pointed~end 5. The sheet material enable to use in the present invenhon is plastics having high wear-resistant and selflubricating properties, such as, for example, polyamide or poly acetal. Thus, the sheet ll of plastics is cut to let a portio 1 12 thereof be ~072051~ ~
transferred to the tip body 1. The portion 12 of sheet 11 is closely fitted into the opening of the hole 2, well conforming to the circumferen-tial wall of the hole. The sheet 11 of plastics usually has a thickness ~
of about 0. 3 mm, so that the cutting by ~he pointed end 5 can be performed ;
by putting a load of only about 7 to 8 kg on the sheet. This provides a much easier method for fitting the seat into the hole 2 of the tip body, as compared with the conventional method in which, for example, a pre-formed thin and round piece of plastics is inserted through the opening of the hole having a diameter of 0. 6 mm. Moreover, the cutting by using the pointed end S can make the portion 12 of she t well conform to the shape of the hole 2. ~r In the next operational step shown in Fig. 8, a pusher rod 23 having a diameter corresponding to that of the hole 2 and having a flat pushing surface 24 is inserted to the hole 2 to force the plastics clogging the opening of the hole 2 deep into the hole. A further forcing ~ -of the pusher rod 23 causes a load of typically about 11 to 12 k8 on the portion 12 of plastlcs, so that the portion 12 may be deformed due to the plastic deformation, and fills all the corners of the bottom portion of the hole 2 ineluding the recess 7 and even behind the pro~ection~, as shown in FiB. 8. It will be noted that the diameter of the pusher rod 23 must be substantiaily equal to that of the hole 2, because otherwise the plastics will flow out around the rod 23 and inconveniently fill a space ~
which is expected to provlde a cavity 18 ( in Fig. 13 ) for pooling ink. ~ ;
From observation of the~ state of filling of the plastics, by vertically cutting the tip body into two halves, it has been found thae the plastics partly invades the narrow communicating passage 4, as denoted by 13 in Fig. 8. This phenomenon has a substantial significance in precision control of the projection of the ball in the final product.
Namely, the degree of the pro jection of the ball is generally defined by the final position of the pusher rocl 23 at the end of its compression ~-~ .
~L07ZOS~ , stroke. Therefore, when the communicating passage 4 is not provided, it is quite difficult to make the volume of the space including the recess 7 defined by the pusher rod 23 at its end of the stroke coincide with ~he volume of the portion 12 of plastics. On the controry, when the commu-nicating passage 4 is provided and the plastics is allowed to partly invade the passage 4, then such coincidence can easily be obtained.
Subsequent to the pushing step by using the rod 23 as above-described, another pusher rod 25 having an end 26 rounded at a curvature equal to that of the ball is inserted and pressed onto the upper sur~ace of the .
portion 12 of plastics to form a curved depresion which constitutes a ball supporting surface 14, as shown in Fig. 9. This step of forming the ball supporting surface 14 is preferably repeated once more after the sub-squent step of punching described below.
In the next operational step shown in Fig. 10, both the plastics 12 and the bottom portion of the hole 2 are punched together due ~;
to shearing by using a punching cutter blade 27 made of a hard metal, to thereby form a groove 15 for guiding ink. The communicating passage 4 has an effective function to reduce, to sOme extent, the load required for punching. Ho~vever, when the profile line of cutting or punching :::: : :
becomes longer, the larger load will be required for punching. And too large cross- sectional area of the ink guldmg groove 15 will incon- ;
veniently reduce the area of the ball supporting surface 14. The supply of ink will be rendered smooth when the width of the ink guiding groove 15 is sufficiently small, due to~the capillary action. However, thepunch-ing blade 27 required for cutting such small groove must be correspond-ingly small and is more likely to be ~amaged. Thus, the punching blade -~
27 is preferably shaped, as shown in Fig. 11, to have a stiffening or strengthening large thickness at its middle portion and gradually thinned~ -ends. The configuration of the ball supporting surface 14 and the ink guiding groove 15 punched by the blade 27 is clearly shown in Fig. 12.
~'~
. '- 10- ', ~2Q51 3 ; ~
As a matter of fact, the narrow width of the blade is typically about 0.1 mm.
It is -to be noted that the protrusions 8 effectively prevent the ball supporting seat from being axially moved during the extraction of the punching blade 27. Such function of the protrusions 8 has a substantial significance in maintaining the precision of the projection of the ball from -' the opening of the ball receiving hole 2 in the final product, and completely obviate the inconvenience tha~ the balI supporting seat is axially moved to accidentally clog the passage of the ink during the use of the ball point pen. ' Hereinafter j the portion 12 of plastics having already punched the ink guiding groove 15 is referred to as " ball supporting seat l! and is denoted by a numeral 16. ~ ' After the ink guiding groove has been formed by punching, the 'ball 17 IS mounted on the ball supporting seat 16. Then, the pointed end 5 of the tip body 1 is shrunk around the ball 17, by a well-Xnown and conventional method, to embrace the ball within the ball receiving hole 2. The thus completed tip of the ball point p`en i5 shown in Fig. 13 ~ ' in which a~ numeral 18 denotes a cavity constituting an ink pool, the function thereof belng well-known in the art.' ~ '-As being'understood'from the description hereinbefore, the ball supporting seat of plastics is 'firmly retained by means of the recess, protrusions and indentations. As a result, the ball supporting seat is ' never planely be rotated7 and is never axlally be moved during process- `
ing, as well as after the complete assembly, so that a good relationship ' between ~he ba~ll and the ball supporting surface is maintained.
Furthermore, since protrusions may be positioned in the vicînity of the upper edge of the recess formed at the bottom of the hole, ; ~'' such protrusions can readily be formed by hitting the bottom surface around the recess by using the hammering tool.
~1~7205~3 -, In addition, the insertion of $he ball supporting seat into the ball receiving hole of the tip body can easily be accomplished by cutting the sheet of plastics constituting the supporting seat by using the pointed end of the tip body.
Fur1her, the improved retaining of the ball supporting seat by the recess, protrusions and indentations can positively be provided by utilizing the plastic deformation of the plas~ics. `
It should be apparent that the various modifications to the .
present invention may be made by those skilled in the art. For example, although the bottom surface of the ball receiving hole has-been shown in the drawings as a conical inclined surface, i~ wïll obviously be under- ~ ;
stood that a fht bottom surPace may similarly be usable.
,~ .
-:
: ~ ' ' ::
: :
- '.
:`
~.
~6~7;~058 In addition, it is quite difficult to insert the prefabricated supporting seat into the ball receiving hole, which makes the mass-production of the ball point pen difficult and troublesome.
SUMMARY O~ THE INVE~NTION
It is therefore an object of the present invention to provide a ball point pen in which the ball supporting seat can be firmly secured in position by seat-retaining means provided in the ball receiving hole of the tip body to thereby prevent the plane rotation and/or the axial movement of the seat held in the ball receiving hole It is another object of the present invention to provide a method of making a tip for a ball point pen in which the formation of seat-retaining means in the ball receiving hoie and the enga8ement of the means with the ball supporting seat, as well as the insertion of the seat into the ball receiving hole are simply and effectively accomplished. ~
In a prior art tip for a ball point pen, there is included a cylindrical metallic tip body having a pointed end, a ball receiving hole having its opening at the pointed end of the tip, a ball supporting seat of a plastics held in the bottom of the ball receiving hole, a bore for deliver-ing inl~ to the ball receiving hole through the ball supporting seat and having its opening at the end of the tip body opposit.e to the pointed end.
A ball is rotatably received within the ball receiving hole and supported on the seat.
According to the improvement of the present invention, there is provided a recess formed in the bottom surface of the ball receiv-ing hole. The recess should have at least one angular portion, and the ball supporting seat made of plastics is deformed to fill all the corners of the bottom of the hole including the recess, thereby preventing the ball supporting seat from planely rotating on the bottom surface of the ball receivlng hole.
3_ ,:
7z~5~3 In the case when both the plane rotation and the axial movement require to be prevented, at least one protrusion may further be formed in the vicinity of the upper edge around the recess~ The ball supporting seat made of plastics is also deformed to fill all the corners of the bottom of the hole including the recess and behind the protrusion due to the plastic deformation. A recess in a circular form without any angular portion may be used when the recess and the protru-sion are both provided.
Such recess and protrusion can be easily provided accord-ing to the method of the present invention. Namely, the bottom surface of the ball receiving hole is hitted and depressed by means of the hammer-ing action of a tool to thereby form a recess corresponding to the profile of the tool. The protrusion can be provided by using a hammering tool having at least one portion adapted to abut the upper edge around the recess. This tool hammers and depresses the abutted portion to thereby form protrusion due to the reactionary deformation in the vicini~y of the upper ed8e of the recess.
In the method of the present invention, the insertion of the ball supporting seat can be easily and conveniently inserted into the bottom of the ball receiving hole, and firmly retained in position. The pointed end of the tip body is pressed strongly onto a sheet of a plastics constituting the ball supporting seat to cut out a portion of the plastics and transfer the portion of the plastics to the opening of the ball receiving hole. Thè thus cut out portion of the plastics is then forced deep into the bottom of the hole adapted to deform the portion to fill all the corners of the bottom of the hole including the recess and even behind the protrusion .
In order to form an ink guiding groove communicating the ball receiving hole and-~he ink delivering bore through the ball supporting seat, both a portlon of the seat and the bottom of the hole are punched at a time by using a punching cutter blade.
- 4- ~;
~Z0S8 On the upper surface of the ball supporting seat is prefer-ably formed a curved depression as a ball supporting surface, on which the ball is rotatably seated.
The present invention will become more clear from the folls:~wing description of preferred embodiments taken in conjunction with the accompanying drawings. Like numerals refer to like parts throughout.
'` ' ' '~.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 i5 a sectional view of the tip body used in the present invention;
' ' . ' Fig. 2 is a sectional view showing forming a recess in the bottom surface of the ball receiving hole of the tip body;
Figs. 3a to 3d are plane views of the bottom surface of the ~!
ball receiving hole in which depressions of various shapes have been formed;
Fig. 4 is a sectional view showing ~rming protrusions;
... : ...... ~ . . :
Figs. 5 and 6 show conf1gurations of protrusions formed at . . . .
the upper edge of a circular recess by usin~g a tool with a triangular and a square profile, respectively ;
.
Fig. 7 is a sectional view showing cutting a sheet of plastics constituting the ball supporting seat by usin~ the pointed end of the tip body;
Fig. 8 is a sectional view showing forcing the cut out ball supporting seat into the bottom of the ball receiving hole;
Fig. 9 1S a sect1onal Yiew showing forming a curved depres-sion on the upper surface of the seat;
Fig. 10 is a sectional v1ew showing punching the bottom of the ball receiving hole by using a punching cutter blade to form the ink guiding groove;
~'~
- 5~ `
2~8 ~
Fig. 11 is a perspective view of a preferred shape of 1he punching cutter blade;
Fig 12 is a sectional view taken along line A-A of Fig. 10;
and Fig. 13 is a sectional view of the tip for a ball point pen completely assembled.
DETAILEI) DESCRIPTION OF
THE PREFERRED EMBODIMENT
Referring now to Fig. 1, a tip body 1 used in the present invention is made of a rod-like cylindrical metallic material, e.g.
stainless steel, having high corrosion and wear-resistant properties.
The metallic material is first subjected to milling to form a frusto-conical shape, and after drilling a ball receiving hole 2 at one end of the cylind~
rical metallic material, the material is cut to a predetermined length required for manufacturing the ~ip bod~ 1. Then a bore 3 for inserting a core, which delivers ink from a ink reservoir (not shown), is bored in the metaIlic material at the other end thereof to complete the tip body 1 having a pointed end 5. The thickness of the annular wall of the pointed end opening is typically about 0.03 mm.
It is preferred, in the present invention, to form a narrow passage 4 communicating the ball receiving hole 2 with the bore 3. Such ~ -communicating passage 4 can be formed, for example, by drilling simul-taneous with drilling the hole 2. The function of the communicating passage 4 will be understood from the explanation hereinafter described.
In general, as a result of the profile of the drill used in the drilling step mentioned above, a conical inclined surface 6 is formed at the bottom of the hole 2. According to the present invention, a recess 7 is ~ormed in this bottom surface 6, remaining a portion of the bottom surface 6 m the vicinity of the circumference thereof unrecessed (Fig. 2).
~ 7Z058 The recess may be Pormed, after drilling the hole 2, by using a hammering tool 20, as shown in Fig. 2. Namely, the tool 20 is inserted into the previously drilled hole 2 so that the head portion of the tool 20 hammers and depresses the bottom surface 6 to form the recess portion 7 corres-ponding to the profile of the tool 20. ;
By forming such recess 7 in the bottom surface 6 of thehole 2, the plane rotation of a ball supporting seat of plastics, which is .
to be inserted and closely filled in the bottom part of the hole 2 including ;
the recess part by the operational s$eps hereinafter described, is effec-tivly obstructed. Since the plane rotation of the seat is considered to accidentally cause clogging the passage way of ink during the use of the ball point pen, the obstraction of such rotation is necessary. In order :~
to obtain the effective obstruction of the rotation, the recess 7 is prefer-ably formed to have at least one angular portion, rather than a circular , recess which cannot provide the effect to resist to the plane rotation of the ball supporting seat.
: .
The recess may be, for instance, a triangular depression 7a in Fig. 3a, a square depression 7b~in Fig. 3b, a square depression having its cen$ral portion remained undepressed 7c in Fig. 3c, or a circular depression 7d having its circumference a plurality of outward projections in Fig. 3d. However, in the case when protrusions are formed in portions close to the upper edge around the recess 7 in the opera~ional step described below, the recess 7 and, accordingly, the head proPile oP tool 20 may be circular without any angular portion. when the recess may be circular in shape, then it may be formed with simul-taneously with the drillmg of the balI receiving hole 2.
In order to obtain seat-retaining means by which more complete retainin~ effect, especially the axial movement of the ball receiving sea$, can be accomplished, it is preferred to perform a pro-$rusion-forming s$ep after the recess-forming step abo~e described.
'~.
lL~721358 In the protrusion-f~rmin~ step, another hammering tool 21 is inserted in the ball receiving hole 2. This tool 21 is different from the tool 20 in that the peripheral edge of the head of the tool 21 has corners 22 adap-ted to abut the inclined conical surface 6 around the recess 7. As the head of the tool 21 strikes and presses the surface 6 around the recess 7, the portions of the surface 6 abutted by the corners 22 o~ the tool 21 are collapsed to form indentations 10 on the remaining unrecesse~ surface 6, and the reactionary deformation in the form oî
inward protrusions 8 is simultaneously produced in plural portions close to the upper ~edge 9 around the recess 7, as wlll be seen from Fig. 4.
Figs. 5 and 6 show configurations of protrusions 8 formed by using, for example, a triangular and a square head prophils of the tools 21, respectively, over a circular recess 7. Althoughneglected from the drawings, it will be ~apparently understood that the recess - : , .
having angùlar portions, as exemplified by 7a, 7b, 7c, or 7d, may be well eoorperated by the tool 21 havmg a head profile of circular or angular, to form~ slmllar protrusions and indentahons. ~ -The indentations 10 are effective, as well as the recess 7, to prevent the plane rotation of the ball supporting seat.
~With the thus processed tip body 1, the next operational step is undertaken as in Fig. 7, wherein the pointed end 5 of the tip - `
body 1 is pressed strongly onto a sheet 11 of a material constituting the ball supporting seat, and~is pulled in one direction to cut the sheet as ~ --if the pointed end 5 is a cutting knife~ Alternatively, the sheet of plastics 11 may be pressed against the pointed~end 5. The sheet material enable to use in the present invenhon is plastics having high wear-resistant and selflubricating properties, such as, for example, polyamide or poly acetal. Thus, the sheet ll of plastics is cut to let a portio 1 12 thereof be ~072051~ ~
transferred to the tip body 1. The portion 12 of sheet 11 is closely fitted into the opening of the hole 2, well conforming to the circumferen-tial wall of the hole. The sheet 11 of plastics usually has a thickness ~
of about 0. 3 mm, so that the cutting by ~he pointed end 5 can be performed ;
by putting a load of only about 7 to 8 kg on the sheet. This provides a much easier method for fitting the seat into the hole 2 of the tip body, as compared with the conventional method in which, for example, a pre-formed thin and round piece of plastics is inserted through the opening of the hole having a diameter of 0. 6 mm. Moreover, the cutting by using the pointed end S can make the portion 12 of she t well conform to the shape of the hole 2. ~r In the next operational step shown in Fig. 8, a pusher rod 23 having a diameter corresponding to that of the hole 2 and having a flat pushing surface 24 is inserted to the hole 2 to force the plastics clogging the opening of the hole 2 deep into the hole. A further forcing ~ -of the pusher rod 23 causes a load of typically about 11 to 12 k8 on the portion 12 of plastlcs, so that the portion 12 may be deformed due to the plastic deformation, and fills all the corners of the bottom portion of the hole 2 ineluding the recess 7 and even behind the pro~ection~, as shown in FiB. 8. It will be noted that the diameter of the pusher rod 23 must be substantiaily equal to that of the hole 2, because otherwise the plastics will flow out around the rod 23 and inconveniently fill a space ~
which is expected to provlde a cavity 18 ( in Fig. 13 ) for pooling ink. ~ ;
From observation of the~ state of filling of the plastics, by vertically cutting the tip body into two halves, it has been found thae the plastics partly invades the narrow communicating passage 4, as denoted by 13 in Fig. 8. This phenomenon has a substantial significance in precision control of the projection of the ball in the final product.
Namely, the degree of the pro jection of the ball is generally defined by the final position of the pusher rocl 23 at the end of its compression ~-~ .
~L07ZOS~ , stroke. Therefore, when the communicating passage 4 is not provided, it is quite difficult to make the volume of the space including the recess 7 defined by the pusher rod 23 at its end of the stroke coincide with ~he volume of the portion 12 of plastics. On the controry, when the commu-nicating passage 4 is provided and the plastics is allowed to partly invade the passage 4, then such coincidence can easily be obtained.
Subsequent to the pushing step by using the rod 23 as above-described, another pusher rod 25 having an end 26 rounded at a curvature equal to that of the ball is inserted and pressed onto the upper sur~ace of the .
portion 12 of plastics to form a curved depresion which constitutes a ball supporting surface 14, as shown in Fig. 9. This step of forming the ball supporting surface 14 is preferably repeated once more after the sub-squent step of punching described below.
In the next operational step shown in Fig. 10, both the plastics 12 and the bottom portion of the hole 2 are punched together due ~;
to shearing by using a punching cutter blade 27 made of a hard metal, to thereby form a groove 15 for guiding ink. The communicating passage 4 has an effective function to reduce, to sOme extent, the load required for punching. Ho~vever, when the profile line of cutting or punching :::: : :
becomes longer, the larger load will be required for punching. And too large cross- sectional area of the ink guldmg groove 15 will incon- ;
veniently reduce the area of the ball supporting surface 14. The supply of ink will be rendered smooth when the width of the ink guiding groove 15 is sufficiently small, due to~the capillary action. However, thepunch-ing blade 27 required for cutting such small groove must be correspond-ingly small and is more likely to be ~amaged. Thus, the punching blade -~
27 is preferably shaped, as shown in Fig. 11, to have a stiffening or strengthening large thickness at its middle portion and gradually thinned~ -ends. The configuration of the ball supporting surface 14 and the ink guiding groove 15 punched by the blade 27 is clearly shown in Fig. 12.
~'~
. '- 10- ', ~2Q51 3 ; ~
As a matter of fact, the narrow width of the blade is typically about 0.1 mm.
It is -to be noted that the protrusions 8 effectively prevent the ball supporting seat from being axially moved during the extraction of the punching blade 27. Such function of the protrusions 8 has a substantial significance in maintaining the precision of the projection of the ball from -' the opening of the ball receiving hole 2 in the final product, and completely obviate the inconvenience tha~ the balI supporting seat is axially moved to accidentally clog the passage of the ink during the use of the ball point pen. ' Hereinafter j the portion 12 of plastics having already punched the ink guiding groove 15 is referred to as " ball supporting seat l! and is denoted by a numeral 16. ~ ' After the ink guiding groove has been formed by punching, the 'ball 17 IS mounted on the ball supporting seat 16. Then, the pointed end 5 of the tip body 1 is shrunk around the ball 17, by a well-Xnown and conventional method, to embrace the ball within the ball receiving hole 2. The thus completed tip of the ball point p`en i5 shown in Fig. 13 ~ ' in which a~ numeral 18 denotes a cavity constituting an ink pool, the function thereof belng well-known in the art.' ~ '-As being'understood'from the description hereinbefore, the ball supporting seat of plastics is 'firmly retained by means of the recess, protrusions and indentations. As a result, the ball supporting seat is ' never planely be rotated7 and is never axlally be moved during process- `
ing, as well as after the complete assembly, so that a good relationship ' between ~he ba~ll and the ball supporting surface is maintained.
Furthermore, since protrusions may be positioned in the vicînity of the upper edge of the recess formed at the bottom of the hole, ; ~'' such protrusions can readily be formed by hitting the bottom surface around the recess by using the hammering tool.
~1~7205~3 -, In addition, the insertion of $he ball supporting seat into the ball receiving hole of the tip body can easily be accomplished by cutting the sheet of plastics constituting the supporting seat by using the pointed end of the tip body.
Fur1her, the improved retaining of the ball supporting seat by the recess, protrusions and indentations can positively be provided by utilizing the plastic deformation of the plas~ics. `
It should be apparent that the various modifications to the .
present invention may be made by those skilled in the art. For example, although the bottom surface of the ball receiving hole has-been shown in the drawings as a conical inclined surface, i~ wïll obviously be under- ~ ;
stood that a fht bottom surPace may similarly be usable.
,~ .
-:
: ~ ' ' ::
: :
- '.
:`
~.
Claims (21)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a tip for a ball point pen including a cylindrical metallic tip body having a pointed end, a ball receiving hole having its opening at the pointed end of the tip body, a ball supporting seat of a plastics held in the bottom of the ball receiving hole, a bore for delivering ink to the ball receiving hole through the ball supporting seat and having its open-ing at the end of the tip body opposite to the pointed end, and a ball rotatably received within the ball receiving hole and supported on the seat; the improvement comprising a recess formed in the bottom surface of said ball receiving hole, said recess having at least one angular portion, said ball supporting seat being deformed to fill all the corners of the bottom of the hole including said recess, thereby pre-venting said ball supporting seat from planely rotating on the bottom surface of the ball receiving hole.
2. The tip for a ball point pen according to claim 1, wherein said recess is a triangular depression.
3. The tip for a ball point pen according to claim 1, wherein said recess is a square depression.
4. The tip for a ball point pen according to claim 1, wherein said recess is a square depression having its central portion remained undepressed.
5. The tip for a ball point pen according to claim 1, wherein said recess is a circular depression having its circumference a plurality of outward projections.
6. The tip for a ball point pen according to claim 1, wherein a ball supporting surface is formed as a curved depression on the upper surface of said ball supporting seat, said ball being rotatably seated on the supporting surface.
7. In a tip for a ball point pen including a cylindrical metallic tip body having a pointed end, a ball receiving hole having its opening at the pointed end of the tip body, a ball supporting seat of a plastics held in the bottom of the ball receiving hole, a bore for delivering ink to the ball receiving hole through the ball supporting seat and having its open-ing at the end of the tip body opposite to the pointed end, and a ball rotatably received within the ball receiving hole and supported on the seal; the improvement comprising a recess formed in the bottom surface of said ball receiving hole, at least one protrusion formed in the vicinity of the upper edge around said recess, said ball supporting seat being deformed to fill all the corners of the bottom of the hole including said recess and behind said protrusion, thereby preventing said ball supporting seat from planely rotating and axially moving on the bottom surface of the ball receiving hole.
8. The tip for a ball point pen according to claim 7, wherein said recess is a circular depression, and the protrusion is formed in the vicinity of the upper edge around the circular recess.
9. The tip for a ball point pen according to claim 7, wherein said recess has at least one angular portion, and the protrusion is formed in the vicinity of the upper edge around the recess.
10. The tip for a ball point pen according to claim 7, wherein a ball supporting surface is formed as a curved depression on the upper surface of said ball supporting seat, said ball being rotatably seated on the supporting surface.
11. In a method of making a tip for a ball point pen including forming a cylindrical metallic tip body having a pointed end, a ball receiv-ing hole having its opening at the pointed end of the tip body and a bore for delivering ink to the ball receiving hole and having its opening at the end of the tip body opposite to the pointed end, inserting a ball supporting seat of a plastics into the bottom of the ball receiving hole, putting a ball on the ball supporting seat in the ball receiving hole, and shrinking the pointed end of the tip body; the improvement comprising the steps of, after forming the tip body, forming a recess in the bottom surface of the ball receiving hole, said recess having at least one angular portion, applying the pointed end of the tip body onto a sheet of a plastics constituting the ball supporting seat to thereby cut out a portion of the plastics and transfer said portion of the plastics to the opening of the ball receiving hole, forcing the thus cut out portion of the plastics deep into the bottom of the ball receiving hole adapted to deform the portion of the plastics to fill all the corners of the bottom of the hole including said recess, punching both a portion of the ball supporting seat and the bottom of the hole at a time to thereby forming an ink guiding groove communicating between the ball receiving hole and the ink delivering bore through the ball supporting seat, and then putting the ball on the ball supporting seat.
12. The method according to claim 11, which further comprises, prior to inserting the ball supporting seat, forming a narrow passage communicating between the ball receiving hole and the ink delivering bore.
13. The method according to claim 11, wherein said recess is formed by using a hammering tool which hammers and depresses the bottom surface of the ball receiving hole.
14. The method according to claim 11, wherein said punching step is carried out by using a punching cutter blade, a horizontal section of which having a stiffening large thickness at its middle portion and gradually thinned ends.
15. The method according to claim 11, which further comprises, after inserting the ball supporting seat, forming a curved depression as a ball supporting surface on the upper surface of the ball supporting seat of the plastics.
16. In a method of making a tip for a ball point pen including forming a cylindrical metallic tip body having a pointed end, a ball receiv-ing hole having its opening at the pointed end of the tip body and a bore for delivering ink to the ball receiving hole and having its opening at the end of the tip body opposite to the pointed end, inserting a ball supporting seat of a plastics into the bottom of the ball receiving hole, putting a ball on the ball supporting seat in the ball receiving hole, and shrinking the pointed end of the tip body; the improvement comprising the steps of, after forming the tip body, forming a recess in the bottom surface of the ball receiving hole, forming at least on protrusion in the vicinity of the upper edge around said recess, applying the pointed end of the tip body onto a sheet of a plastics constituting the ball supporting seat to thereby cut out a portion of the plastics and transfer said portion of the plastics to the opening of the ball receiving hole, forcing the thus cut out portion of the plastics deep into the bottom of the ball receiving hole adapted to deform the portion of the plastics to fill all the corners of the bottom of the hole including said recess and behind the protrusion, punching both a portion of the ball supporting seat and the bottom of the hole at a time to thereby forming an ink guiding groove communicating between the ball receiving hole and the ink delivering bore through the ball supporting seat, and then putting the ball on the bail supporting surface.
17. The method according to claim 16, which further comprises prior to inserting the ball supporting seat, forming a narrow passage communicating between the ball receiving hole and the ink delivering bore.
18. The method according to claim 16, wherein said recess is formed by using a hammering tool which hammers and depresses the bottom surface of the ball receiving hole.
19. The method according to claim 16, wherein said protrusion is formed by using a hammering tool having at least one portion adapted to abut the upper edge around the recess, said tool hammering and pro-truding the abutted portion of the upper edge around the recess.
20. The method according to claim 16, wherein said punching step is carried out by using a punching cutter blade, a horizontal section of which having a stiffening large thickness at its middle portion and gradually thinned ends.
21. The method according to claim 16, which further comprises, after inserting the ball supporting seat, forming a curved depression as a ball supporting surface on the upper surface of the ball supporting seat of the plastics.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1976032283U JPS5513082Y2 (en) | 1976-03-19 | 1976-03-19 | |
| JP1644977A JPS53115322A (en) | 1977-02-17 | 1977-02-17 | Tip for ball point pen and method of producing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1072058A true CA1072058A (en) | 1980-02-19 |
Family
ID=26352802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA274,269A Expired CA1072058A (en) | 1976-03-19 | 1977-03-18 | Ball point pen tip with supporting seat press fitted into corners of ball receiving hole |
Country Status (7)
| Country | Link |
|---|---|
| US (2) | US4231146A (en) |
| CA (1) | CA1072058A (en) |
| CH (1) | CH617623A5 (en) |
| DE (1) | DE2712058C2 (en) |
| FR (1) | FR2344410A1 (en) |
| GB (2) | GB1571318A (en) |
| IT (1) | IT1086630B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5614082U (en) * | 1979-07-14 | 1981-02-06 | ||
| DE3811530C1 (en) * | 1988-04-06 | 1989-10-12 | Gebr. Schneider Gmbh, 7741 Tennenbronn, De | |
| JP2531752Y2 (en) * | 1991-10-29 | 1997-04-09 | 株式会社サクラクレパス | Applicator |
| DE69329348T2 (en) * | 1992-06-26 | 2001-03-08 | Gillette Co | PEN |
| US5383901A (en) * | 1993-10-18 | 1995-01-24 | Ethicon, Inc. | Blunt point needles |
| CA2138719C (en) * | 1993-12-22 | 2004-08-03 | Nobuo Sekine | Ballpoint pen and cap therefor |
| CH692244A5 (en) * | 1998-01-28 | 2002-04-15 | Premec Sa | Method for fixing a spring in a hollow body. |
| US6224284B1 (en) | 1999-10-12 | 2001-05-01 | Dri Mark Products Incorporated | Metallic ink composition for wick type writing instruments |
| EP1329337A1 (en) * | 2002-01-17 | 2003-07-23 | Schächter, Friedrich | Tool for manufacturing the tip of a ballpoint pen |
| CN107639391A (en) * | 2017-10-25 | 2018-01-30 | 平阳县尚伟笔业有限公司 | A kind of written processing method |
| US11660905B2 (en) * | 2019-09-11 | 2023-05-30 | Kotobuki & Co. Ltd. | Ball pen tip manufacturing machines, ball pen tips, and ball pens |
Family Cites Families (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR965140A (en) * | 1950-09-04 | |||
| FR965870A (en) * | 1950-09-23 | |||
| CH218660A (en) * | 1939-08-19 | 1941-12-31 | Weiller Otto | Ball point for writing implements. |
| BE472576A (en) * | 1943-08-09 | |||
| BE467540A (en) * | 1945-07-09 | |||
| BE478936A (en) * | 1946-07-24 | |||
| FR945809A (en) * | 1947-04-17 | 1949-05-16 | Ballpoint pen enhancements | |
| US2487483A (en) * | 1947-07-26 | 1949-11-08 | Peter J Gaylor | Ball point pen |
| FR978043A (en) * | 1948-11-12 | 1951-04-09 | Jarry Ets | Ballpoint Pen Improvements |
| CH290326A (en) * | 1950-03-27 | 1953-04-30 | Scholz Walter | Ballpoint pen with a writing ball held by a magnet. |
| FR1108400A (en) * | 1954-07-06 | 1956-01-12 | Improvement in ballpoint writing devices | |
| DE1209912B (en) * | 1958-03-28 | 1966-01-27 | Faber Castell A W | Ballpoint pen with a ball that can be moved inwards against a restoring force |
| FR1225648A (en) * | 1957-08-19 | 1960-07-01 | D C B Ltd | Improvements to writing instruments |
| CH340427A (en) * | 1957-09-14 | 1959-08-15 | Gossiaux Willy | Method of manufacturing a bar to be machined, bar to be machined resulting from this method and use of said bar |
| US2969583A (en) * | 1958-09-08 | 1961-01-31 | Schachter Friedrich | Ball point pen |
| US3048148A (en) * | 1959-03-18 | 1962-08-07 | Salvatore P Sirianni | Ball point pen |
| CH357003A (en) * | 1959-09-24 | 1961-09-15 | Caran D Ache Crayons | Ball point |
| US3237279A (en) * | 1964-03-17 | 1966-03-01 | Amphenol Borg Electronics Corp | Method of providing small drive units with thrust bearings |
| US3641659A (en) * | 1965-08-30 | 1972-02-15 | Continental Can Co | Manufacture of vented closures |
| US3584101A (en) * | 1968-10-08 | 1971-06-08 | Stewart Warner Corp | Method for making lip-type rotary shaft seals |
| US4061430A (en) * | 1972-06-02 | 1977-12-06 | Montblanc-Simplo Gmbh. | Socket structure for the ball of a ball point pen refill |
| JPS5025628U (en) * | 1973-06-29 | 1975-03-24 | ||
| US3959061A (en) * | 1974-10-24 | 1976-05-25 | Kraftco Corporation | Apparatus and method for inserting membrane into container lids |
-
1977
- 1977-03-17 IT IT7748532A patent/IT1086630B/en active
- 1977-03-18 CA CA274,269A patent/CA1072058A/en not_active Expired
- 1977-03-18 DE DE2712058A patent/DE2712058C2/en not_active Expired
- 1977-03-18 FR FR7708127A patent/FR2344410A1/en active Granted
- 1977-03-18 GB GB11554/77A patent/GB1571318A/en not_active Expired
- 1977-03-18 GB GB22739/79A patent/GB1571319A/en not_active Expired
- 1977-03-21 CH CH350577A patent/CH617623A5/de not_active IP Right Cessation
-
1979
- 1979-02-15 US US06/012,553 patent/US4231146A/en not_active Expired - Lifetime
- 1979-04-27 US US06/034,006 patent/US4251164A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE2712058C2 (en) | 1986-07-03 |
| US4231146A (en) | 1980-11-04 |
| CH617623A5 (en) | 1980-06-13 |
| FR2344410B1 (en) | 1983-06-10 |
| FR2344410A1 (en) | 1977-10-14 |
| IT1086630B (en) | 1985-05-28 |
| DE2712058A1 (en) | 1977-09-29 |
| GB1571318A (en) | 1980-07-16 |
| US4251164A (en) | 1981-02-17 |
| GB1571319A (en) | 1980-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1072058A (en) | Ball point pen tip with supporting seat press fitted into corners of ball receiving hole | |
| EP3120992B1 (en) | Method for anchoring a joining element in an object and joining element to be used in the method | |
| US4262562A (en) | Golf spike wrench and handle | |
| CA1103618A (en) | Cosmetic pencils | |
| JPH074814B2 (en) | A punching device for making a punch with an undercut | |
| US5471719A (en) | Air gun pellet forming method | |
| US3853495A (en) | Fitment of handles to bladed hand tools | |
| US2578351A (en) | Method of making rock drill bits | |
| KR920009475A (en) | Manufacturing method of nozzle of solenoid valve | |
| GB1591589A (en) | Spacer | |
| JPH0241208A (en) | Drill for manufacturing drill hole with undercut section and manufacture of said drill | |
| JP2607713Y2 (en) | Ball pen refill | |
| JP3235355B2 (en) | Method for manufacturing ballpoint pen tip | |
| EP0795694A2 (en) | Bearing retainer for a roller bearing for use in a guide-post of a die-set | |
| JPH02169143A (en) | Metal joining parts and production thereof | |
| JP4030070B2 (en) | Ballpoint pen | |
| JP2862908B2 (en) | Movable blade body holding structure of cutting machine | |
| JPH0386419A (en) | Movable blade holding structure of shear | |
| JPS6213197B2 (en) | ||
| GB2401526A (en) | Animal Ear Tag | |
| JPS59147724A (en) | Stud planting method | |
| JPH0780100B2 (en) | Collar member connection method for drill | |
| JPS6334812Y2 (en) | ||
| JPH05573Y2 (en) | ||
| JP3361963B2 (en) | Tooling equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |