US2754515A - Device for stapling wires - Google Patents

Description

July 17, 1956 F. KING DEVICE EOE STAPLING WIRES Filed Dec. 1l, 1953 IN V EN TOR. /EkA/vx KING BY @M A TTOPNE Y United States PatentO DEVICE non STAPLING wrREs Frank King, Port Monmouth, N. J., assigner tomarrow Fastener Co. Inc., Brooklyn, N. Y., a corporation of New York Application December 11, 1953, Serial No. 397,520

9 claims. (cl. 1-49) i This invention relates to Staplers and similar devices particularly adapted for stapling wires and cable.

In stapler devices, particularly those of the springactuated type, the length of the driver stroke is definitely limited due to considerations such as the 'maximum handle movement which may be conveniently encompassed by the hand of the operator, and other factors. Furthermore, these prior art devices are so constructed that the maximum length of the staple is equal to the length of the driving stroke of the staple driver. Therefore, these prior art devices are capable of utilizing only staples hav,- ing a denite limited length.

It is a primary object of the present invention to provide a stapling device permitting the utilization of a longer staple than heretofore employed without requiring an increase in the length of the driver stroke.

Another object is to provide a stapler of the character described and having a novel construction rendering it particularly suitable for stapling wires, insulated cable, and the like.

A further object is to provide the stapler with a novel staple magazine having a longitudinal groove or channel in the bottom thereof and serving as a guide for the wire received therein, whereby the stapler may be quickly and easily placed in proper aligned relation to the wire to be stapled.

Still another object is to provide arstapler of the character described wherein said staple magazine maintains the wire in proper alignment with the staple so that when the staple is driven its legs are prevented from accidentally passing through the wire insulation to injure the latter. v

A further object is to provide a wire stapler of the character described and so constructed that the outer end of the staple driven is prevented from contactingand injuring the wire insulation at the end of the driver stroke.

Another important object is to provide a novel staple magazine which will provide the above-noted advantages and modes of operation and whichmay be employed with both conventional prior art Staplers and the novel stapler disclosed in my prior co-pending application Serial No. 303,900, led August 12, 1952 and issued as U. S. Letters Patent No. 2,671,215 on November 9, 1954,'the present staple magazine being easily substituted for that in said prior application without requiring major changes in the remaining parts of the stapler.

A further object is to provideastaple magazinecomprising a pair of outer vertical wall portions the lower edges of which are formed integral with a pair of inner vertical wall portions spaced therefrom the latter having integral with the upper edges thereof a horizontal web portion, whereby said inner wall portions and `said web portion form a U-shaped channel or groove'adapted lto receive the wire to be stapled, the staple to be driven thus being initially positioned to straddle the wire before the stapling operation commences. y

Other objects and advantages of the present invention are inherent in the structure claimed and disclosed vor ice 2 Will become apparent to those skilled in the art as the detailed description proceeds in connection with the accompanying drawing wherein: y

Fig. 1 is a vertical longitudinal sectional view of a Stapler in accordance with the present invention;

Fig. 2 is a transverse vertical sectional view taken on line 2-2 of Fig. 1;

Fig. 3 is a sectional view similar to Fig. 2 but showing only the lower portion of the device with parts in the position assumed at the end of the staple driving stroke;

Fig. 4 is a sectional view on line 4--4 of Fig. l;

Fig. 5 is a front elevational View with the upper portion of the device broken away;

Fig. 6 is a side elevational View of the novel staple; magazine; and

" Fig. 7 is a top plan view of the magazine.

Referring now to the drawing, reference numeral 10i designates a spring-actuated type of stapler embodying; the invention. The stapler 10 is similar to that disclosed; in said prior application Serial No. 303,900 except for* the novel stapler magazine and several minor details ofi' construction, as will be explained in detail below, and. reference is hereby made to said prior application for a more detailed disclosure of the stapler mechanism which is common to both said prior and the present applications,i like parts therof.

The stapler 10 comprises a body 11 comprising a pair of similar, symmetrically disposed parts 12 having meet ing edges 14 along a longitudinal vertical plane through the middle of the body. The body is formed with a hand hole 15. It is open at the bottom and at its front end and at the forward portion of its upper end. Each of the body portions 12 has a side wall 16 from whichext'end inwardly, curved portions 17 forming said hand hole 15. At the lower end of each of the side walls 16 is a longitudinal bottom .edge 18. The side walls 16 have rear ends 19. The upper portion of the rear end of the said walls 16 and the top portions thereof are curved as at 20 meeting along the meeting plane 14. At their forward ends, side walls 16 are formed with vertical shoulders 21 from which extend forwardly side walls 22 spaced further apart than side walls 16.

The side walls 22 have forward edges 23. The shoulder 21 has an intermediate semi-circular shoulder portion 21a. At the axis of shoulder portions 21, side walls 22 are formed with aligned through-openings 24. The wall portions 20 are upwardly curved as at 20a at their forward ends. Extending from the upper ends of walls 20a are forwardly and upwardly inclined edges 25 merging with a downwardly curved edge 26 from which extend downwardly and forwardly, inclined edges 27. The edges 27 extend down to the forward edges 23. Forward edges 23 are formed with longitudinal grooves 23a for the purpose hereinafter appearing. The side wall portions 22 are formed adjacent the curved edges 26 with aligned through-openings 28.

Fitted over the front of the body is a front nose piece 32. Nose piece 32 may be made of hardened steel. It comprises a front wall 33 from which extend rearwardly parallel side walls or ilanges 34. The front wall 33 has a bottom edge 35 spaced below the bottom edge 18 of the body. The side walls 34 have bottom edges 36 in the same plane as edges 35. The front wall 33 has a forwardly pressed substantially rectangular portion 38 for the purpose hereinafter appearing. Furthermore, said wall 33 is formed below the forwardly spaced portion 3S with a pair of parallel horizontally aligned vertical slots 39.

At theA upper end of the front wall 33 is an upwardly y and rearwardly inclined wall 40 contacting the inclined` edges 27 'andextending about half way up said edges.

Saidtside wallsorv flangesr34 'contact the "outer surfaces edges 42 are inclined edges 43.' Extending `forwardly from the edges 43 areedges 44. Extending 4upwardlyfrom the front ends of edges 44 arevertical'edges 45.V Extendingl froml the upper ends of vedges 45are rearwardly inclined edges 46 from which extend edges 47 located around'and spaced from the openings 28. Edges 47 extend down to the upper ends of the front wall'33, The-upper ends of the side'walls 34 thus comprise ears 48 and they are formed with Aopenings registering with `the openings 28 in the side wall portions 222 Extending through theregisteringopenings 28, isa shaft 50 riveted at its ends as shown in Fig. 2 of the drawing. The portion of the side. walls 34 bounded by edges 42, 43 comprises ears'51 formed with'through openings registeringwith the openings 24 in the side wall porf tions 22. Extendingpthrough registeringopenings 24, is a bolt 53. Bolt 53'is removable, forthe purpose hereinafter appearing. It will now be understood .that shaft 50 and bolt 53 serve toattach nose piece32'to the front of the body.

Mounted-on the body 11is a bottom stop, member S5. Said bottom stopmember55 is Aa metalplate and may be hardened.. Itis inxhorizontal position as shown in Figs. l and 2.

Attached onto the .top surface of 'the-bottom stop 55 is a shock absorber 60 of the same shape asmember 55 and overlying the sameand made of either rubber, plastic or any other suitable material to absorb shocks.

Mounted on andbetweenwall portions 22`is'a top stop 61.v Top stop 61.is.fo`rmed with a plurality of downwardly pressed lips 63 arranged in acircle, for the purpose here-Y inafter appearing. Top stop 61lis disposed above the the front wall 67 'are side walls 70. The side walls 70' are formed with rearwardlyl extending vhooks.70a `having upwardly and rearwardly inclinedunder edges 7Gb located substantially midway between the front and reary ends of said side walls.

It will be noted that the cup. is open at its upper end.

Inserted within the cup and contacting th'e bottornwall 468Y is the lower end .of a coil compression spring 72, the upper end of which contacts the underside of the top stop 61. The downwardly pressed lips 63 are received within the upper end of spring 72. Riveted to the front wall 67 as by rivet 73 is a driver blade 74 passing through.l

registering slots in the bottom stop 55 'and the shock absorber 60, respectively. The head of the rivet 73`rnay he moved through the recess formed by the forwardly pressed wall 38.

The front wall 67 hasa forwardly pressed lip 75 'contactingV the upper edge of theblade 74; Also thefront wall 67 has side extensions 77 received within'the groove 23a and contacting the rear;surface of ithe front wall 332 It will now` be understood that. the compression spring 72l presses'the plunger-downwardly Within the bottom of the stap1er body 11 is a.novel staple magazine,177"wherein resides` the noveltyof'the present-invention over the disclosurein saidiprior applica'- tion Serial No. 303,900. Magazine 177 comprises an outer"ca'sing' 178`havingy a^pair of longitudinal vertical outer side wall portions 179 formed at their forward edges with lugs 180 projecting through slots 39 so that the hardened nose piece 32 aids in supporting the forward end of magazine 178. The wall portions 179 are provided at their rear upper ledgeswith integral upstanding apertured ears-.181-reeeivingA a pivot pirrSl which also passes throughI suitable registered 'openings in body 11. Whenbolt '53f'i'stiremoved, noseipiece32 may be swung forwardly andlmagazine 177 'may then be swung downwardly about its pivot pin 81 for servicing-or cleaning out staplernltl.Y

As shown in Fig. 4, the lower ends of outer walll portions 179 are curved'inwardlyandupwardly at 182 and are integral with a pair of inner wall portions 183 spaced from outer wall portions 179 to form therebetween a spaeefor receiving the lower leg portions of the staples S. The upper .ends of inner wall portions 183 are curved inwardly at 184 andare. integral with a horizontal web portion 18S-extending therebetween.

Mounted within'the hollow interior of magazine casing 178 and extending,therethroughout is a'staple guide 186 having a U-shaper configuration in cross-section and cornprisinga horizontalweb portion- 187 secured to the upper surface of casingwebportion 185 by rivets 186. Integral withthe opposite ends. of web portion 187 are vertical walllportions188 extending upwardly parallel to outer side wall portions 179'and spaced inwardly from the latter to the-same extent as the inner side wall portions 183.

Thev upper endsfvof 'outer side wall'portions 179 are formedintegral. with. horizontal top-wall portions 189 extending inwardly therefrom and having opposite inner edges. 190 (Fig. 7).spaced fromeach other to provide a longitudinal slot:191"ha,ving its forward end closed by a pair of Vintegral-horizontal-flanges 192 integral with top wall portions 189.` The forward edges 193 of flanges 192 are spaced rearwardly. of the forward edges 194 of cuter side.walllportions.179 lto provide a space through which staple driver. 74 may slidedu'ring its driving stroke.

Referring again to Fig.V 4, the-upper edges of vertical wall portions 188.of staple guide 186 are spaced below the top wall'portions 189l of 'magazine casing 178'. lt willthus.v be seen thatcasing 178 and staple guide 186 cooperate to form an enclosed longitudinal space or channel-way of inverted U-shaped configuration adapted to receive a horizontallyfaligned series or strip of U-shaped staples indicatedat S in Fig. 1. Referring to Fig. l, the forward edges 18-31'of lthe inner wall portions 183 of casing 178 are spaced a considerable distance rearwardly of the forwardend -ofrmagazine 177,'portions of walls 182,"183'bein`gcutaway forwardly of said edges 183.

The outer width 4of magazine casing .178 is slightly less than ther interior dimension between side walls 16 of staplebody 1I wherebyV casing 178 may be received between. walls'l." The lower edges 18 of the latter need not;extend` down to the lower ends of'wall portions 179. However-,it is preferable thatthe lower edges 35, 36 of front wal133 and sidewalls'34 of nose piece 32 substantiallyfcoincide withV the vlower ends of magazine 178. Hence to substitute magazine 177 for the magazine 78 in my prior application Serial No. v303,900 it is merely necessaryto replace the latter 'by the former, and a longer nose piece 32l maybe substituted if so desired.

Extending .through the interior of staple guide 186 is a rod 19'5 the' rear endl of -which projects upwardly at 196 and then arcuately to form a hook portion 197' engaging pivot pin 81'. A staple-pusher 198 comprising a horizontal top portion 199 -integral with a vertical portion 200. is slidablyv mounted within magazine casing 178 and staple guide 186,' top portion 199 sliding within slot 191 of casing 1781 Pusher'portion 200 is provided with an aperture receiving rod .195 and is urged forwardly by the forward .endofa compression coil spring 201 having a rear endv abutting against a stopr collar 202'secured atV the rear end of Yrod 195. The forward end of the latter is provided with projecting lugs 202 to retain pusher 198 or rod 195. It will thus be seen that pusher 198 willv be urged forwardly by spring 201 to continuously feed the stack of staples S toward the front of magazine 177 where the foremost staple of said stack will be driven downwardly during the stroke of staple driver 74, as will be explained in more detail below.

Means is provided for raising and releasing the plunger 65 to drive a staple from the magazine. To this end there is pivoted'on the shaft 50 a handle 85. Handle 85 has a top wall 86 from which extend side flanges 87. Said flanges 87 are formed with through openings through which the shaft 50 passes. The said side flanges 87 t over the side walls 34 of the front nose piece. The top wall S6 has a forwardly and downwardly inclined eX- tension 89 contacting the inclined edges 27. The lower end of ange 89 substantially meets the upper end of ange 40. On shaft 50 and within the body is a torsion spring 91, one arm of which contacts the underside of the top wall of the handle and the other arm of which engages the back of top stop 61. Thus the torsion spring 91 tends to raise the handle.

Attached to the underside of the handle, rearwardly of the shaft 50, is a saddle 92 formed with a pair of downwardly extending apertured anges 93 carrying a transverse pivot pin 94. Pivoted to the pivot pin 94 and disposed within the flanges 93 is a link 95. Link 95 has a pair of side walls 96 interconnected by a rear web 97. The lower ends of side walls 96 carry a transverse pivot pin 98. Side walls 16 of the body members 11 are formed with aligned openings carrying a transverse pivot pin 100 disposed below and forwardly of the pivot pin 98.

Pivoted to the pivot pin 100 is a lever 101. Lever 101 comprises side flanges 102 interconnected byl a bottom 3 web 103. Side walls 102 have upwardly and rearwardly extending arms formed with openings through which the pivot pin 98 passes. Said side walls 102 also have downwardly and forwardly inclined arms carrying a transverse pivot pin 105. Pivoted to the pivot pin 105 is the upper end of link 106. Link 106 has side walls 107 interconnected by front web 108. On the pivot pin 105 is a torsion spring 109 having one arm engaging the front edge of the web 103 and a second arm contacting the back of the web S. Thus torsion spring 109 tends to swing the link 106 forwardly.

The side walls 16 of the body members 11 are formed with aligned through-openings through which pass a transverse pivot pin 110. Pivoted on the pivot pin 110 is a trigger member 111. Trigger member 111 has side walls 112 interconnected by a bottom web 113. Side walls 112 are formed adjacent their rear ends with kidney shaped openings 114 through which pivot pin 110 passes. These kidney shaped openings 114 are somewhat elongated but have a notch 115 at their rear lower ends, for the purpose hereinafter appearing. The side walls 112 are in alignment with the side walls 70 of the cup 66. Saidv side walls 112 have at their forward ends upwardly projecting pointed portions 116 engaging under edges 70b of the hook 70a. Said side walls 112 are formed with aligned through openings rearwardly of the pointed portions 116 carrying a transverse pivot pin 119. The lower ends of the side walls 107 of the links 106 are formed with apertures through which the pivot pin passes.

It will be noted that the torsion spring 109 normally tends to press the trigger 111 forwardly so that the pivot pin 110 is located at the rear end of the slots 114 and is engaged within the oifset portions 115 of said slots.

When the handle 85 is in its normal up position and the plunger 65 restson the shock absorber 60, the parts are in the position shown in Fig. l of the drawing. When it is desired to operatevthe device, the handle 85 is depressed causing the handle to swing downwardly about the shaft 50. Link 95 is then pushed downwardly to rotate the lever 101 in a clockwise direction about the pivot pin to raise the link 106 and thus swing the trigger 111 in a clockwise direction about the pivot pin to raise the plunger 65. As the plunger is raised, the pointed ends of the trigger slide upwardly and rearwardly along the under edges 70b of the hooks 70a. At a predetermined point in the vertical movement of the plunger, the pointed ends 116 move beyond the hooks and permit the compressed spring 72 to cause the plunger to descend and at the same time the driver blade will push out the foremost staple in the staple magazine. As the plunger descends the hook 70a will move down below the Vpointed ends 116. When the handle is released the trigger 111 will swing in a counterclockwise direction down with the upward movement of the handle.

The forward edges of the flanges 112 adjacent the pointed ends 116 are curved or cammed downwardly and rearwardly as at 117. As the cammed edges 117 contact the downwardly and forwardly curved or cammed edges 118 of the hooks 70b (see Fig. 3), the trigger 111 is pushed rearwardly against the tension of the torsion spring 109 so that the trigger will by-pass the hooks 70a. During such movement the shaft of the pivot pin 110 will move out of the oifset portion of the kidney shaped slot 114. l

Elongation of the slot 114 permits the trigger to move back. However, as soon as the pointed end 116 passes below the hook 70a, torsion spring 109 will again snap the trigger forwardly and the pivot pin 117 will again snap into the offset portions 115 of the slots 114 and then the tacker will again be in the position shown in Fig. l.

The manner of utilizing stapler 10 to staple a wire will now be brieily described. The wire indicated at W is shown as having an insulating cover but any type of wire may be employed. The reference letter B indicates a wooden member to which wire W is to be stapled. As shown in Figs. l, 2 and 5, wire W is placed adjacent member B and stapler 10 is positioned so that wire W lies within the groove or channel formed by inner wall portions 183 and web portion 185 of magazine 178. The groove or channel thus acts as a guide for the wire and enables the stapler 10 to be quickly and easily moved into proper aligned relation with wire W.

Furthermore, it will be seen that before the stapling operation commences, the foremost staple to be driven is in a straddling position with respect to wire W and the pointed lower ends ofthe staple legs of the U-shaped staple are below the top surface of wire W and render it impossible for the staple to pierce the insulation of wire W. Also the lower end of staple driver 74, when in its lowermost position as in Fig. 3, is spaced above wire W and cannot injure the insulation thereof. It will now be apparent that the device of the present invention enables the utilization of a staple which is considerably longer than the stroke of driver 74 and successfully attains the objects of the invention stated above.

It is to be understood that the specific embodiment disclosed in the drawing and described above is merely illustrative of one of the many forms which the invention may take in practice without departing from the scope thereof delineated in the appended claims.

I claim:

1. A staple magazine comprising a longitudinal horizontal hollow outer casing having a pair of outer vertical horizontally-spaced wall portions, a pair of inner vertical wall portions each adjacent to and spaced inwardly from a respective one of said outer wall portions and having lower ends integral with the lower ends of said outer Wall portions and upper ends spaced below the upper ends of said outer wall portions, and a horizontal web portion integral with and extending between said upper ends of tne inner wall portions, and a U-shaped longitudinal staple guide within said casing and having a horizontal base portion resting upon and secured to the upper surface of said web portion and wall portions extending vertically upwardly from said base portion, each of the last-recited wall portions b'eing adjacent to and spaced inwardlyy from'. ak respective' one of said casing outerV wallportions,V said* casing-web portion' and inner wall portionsforming therebetween a downwardlyopening channel having-at its underside, an' uncovered, open longitudinal' groove for receiving vva 'wire or similar workpiece tobe stapled, said groove extending abovethe lower endof thepassages formed between the vertical outerwall portions of the casingv andthe` inner wally portions of said casing.

2. A staplemagazinecomprisingalongitudinal casing, channelway'm'eanswithin the'casing1 forreceiving and guiding a supply of U-shaped staples-forming an uncovered open groove` opening downwardly throughout its length, and means on the underside-of the casing for receiving and guiding a wire orv similar workpiece to be stapled and'maintainingf said workpiece in aligned relation toe said staples, saidfstaple receiving and guiding means comprising a stapleimagazine having an elongated passage, lhaving portionsto'y receive the crown and leg portions ofthe-staples, said'groove being'located between the portions of the passage whichreceive the legs of' theV staples and extending above thelower ends of said-passage portions.

3. Astaple'magazine Vas recited in claim-2 wherein the last-recited means comprises a pair of spaced vertical elements and a horizontal element spaced above the lower ends of'saidpair of elements, said three elements forming said longitudinal groove for receiving said'workpiece.

4. A staple magazine for a strip of staples each having a crown portion and leg portionsextending down fromthe crown portion, said magazine comprising means to` form alongitudinal passage for suchA strip, said passage'having portions to-receive said crown and leg portions of the staples, and said=magazine beingy formed with a downwardly opening lchannel having atits underside, an uncovered,` open longitudinal groove -located between the portionsA of the passage' that receive the leg portions of the staples and extending above the lower ends of said last-recited passage portions, said groove being adapted' lower ends integral with the lower ends of said outer wall portions and upper ends'spaced below the upper endsv of 'said cuter wall portions, and a horizontal web portion integral with and extending between said upper ends'of the' inner wall portions, and a longitudinal staple guide Within said casing and having wall portions extending vertieallj.,y upwardly from said web portion, each of the last-recited wall portions being adjacent to and spaced inwardly from a respective one of said casing outer wall portions, said casing web portion and inner wall portions forming therebetween a downwardly vopening channel having at its underside, an uncovered, open longitudinal groove for receiving a wireY or similar workpiece tov be stapled, said groove extending above the lower-'ends of the passages formed between said outer vertical Wall portions and said inner vertical wall portions.

6. A staple magazine comprisingA a longitudinal hori-` zontal-hollow louter casing having a pair of outer vertical horizontally-spaced wall portions, a pair of inner vertical wall portions each adjacent to and spaced inwardly from a respective oneof said outer wall' portions and yhaving upper ends spaced belowthe upper ends of said outer wall portions, anda horizontal web portion integral with and extending between saidupper ends of theinner'wall portions, and a longitudinal staple guide'within said casing and having wall' portions extending vertically upwardly'fromsaidportion, eachv of the 'last-recited wall portions being'adjacent tofand spaced inwardly from a respective one of said'casing outer wall'portions, said' casing. web portion and inner wall portions forming therebetween a downwardly opening channel having at its underside an uncovered, open longitudinal groove for receiving a wire of similar workpiece to' be stapled, said groove extending abovethe lower ends of the passages formed between said outer vertical wall portions and said inner vertical wall portions.

7. A stapler device comprising a body anda staple magazine mounted at the underside of said body, said stapler magazine comprising a longitudinal horizontal hollow outer casingghaving a pair of outer vertical horizontally-spaced wall portions, a pair of inner vertical wall portions each adjacent to and each spaced inwardly from a respective one of said outer wall portions and having upper ends spaced below the upper ends of said outer wall portions, and a horizontal web portion integral with and extending between said upper ends of the inner wall portions, and a longitudinal staple guide within said casing and having wall portions extending vertically upwardly from said portion, each of the last-recited wall portions being adjacent to and spaced inwardly from a respective one of said casing outer wall portions, said casing web portion and inner wall portions forming therebetween a downwardly opening channel having at its underside an uncovered, open longitudinal groove for receiving a wire or similarl workpiece to be' stapled, said l grooves extendingabove the lower ends of the passages formed between said outer and inner vertical `wall portions, a'staple driver mounted for vertical reciprocal movementA within the body to drive staples from said magazine, and actuating means for moving said staple driver in a downward driving stroke having a length less than the length of the staples accommodated by said magazine. Y

8. A stapler device comprising a bodyl and a staple magazine mounted within the lower A end of the body, said'magazine being for a strip of staples each having a crown portion and leg portions extending down from the crown portion, said magazine comprising means to form a longitudinal'passage for such strip, said passage having portions to receive said crown and leg portions of the staples, and said magazine i being formed with means forming a longitudinal downwardly opening uncovered, open groove located between the portions of the passage that receive the leg portions of the staples an'dladjacent the lower ends of said last-recited passage yportions and extending above said lower ends, said groove being adapted to receive a wire or the like'longitudinal element to be stapled,l a staple'driver slidably `mounted within the body for vertical reciprocalmovement within thel body to vdrive staples'from saidmagazine, and vactuating means on the body for moving the` staple driver in a downward driving stroke having a length less than theheight of'said magazinel passage portions which receive thestaple leg portions, and means to stopthe downwardly stroke of 'the driver to prevent lthe crown portion of the staple from cutting through the wire.

9. A stapler device comprising abody and a staple magazine for a strip of staples each having'a crown portion and leg portions extending down from the crown portion, said magazine comprising means to form a longitudinal passage for such strip, said passage having por-v tions to receive said crown and leg portions of lrthe staples, y and said magazine being provided'with 'means formed with a longitudinal groove located"between the portions of the passage that receiveltheleg vportions of the staples and adjacent the lower endsofsaidlastlrecited portions, and extending above said lower.y ends, said groove beingv downwardly opening, uncovered and open at the bottom throughoutrits'length and'adaptedto receive a wire 'or thev like longitudinal elementfto be stapled, a stapleI drivermounted for'vertical'reciprocal movement within the'body to drive'vstaples'from: said magazine, actuating means forA urging saidl'stapleA vdriver downwardly, and means for stopping the' 'downward movement of said'dri'ver'at a lowermostposition where 10 the lower end of the driver is located intermediate the 2,285,512 Harley June 9, 1942 upper and lower ends of said magazine passage portions 2,314,848 Polzer 1 Mar. 23, 1943 which receive the staple leg portions. 2,351,044 Heller June 13, 1944 2,524,061 Lindstrom Oct. 3, 1950 References Cited in the le of this patent 5 2,637,030 Wickman May 5, 1953 UNITED STATES PATENTS FOREIGN PATENTS

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