US3730383A - Container body and a method of forming the same - Google Patents
Container body and a method of forming the same Download PDFInfo
- Publication number
- US3730383A US3730383A US00167204A US3730383DA US3730383A US 3730383 A US3730383 A US 3730383A US 00167204 A US00167204 A US 00167204A US 3730383D A US3730383D A US 3730383DA US 3730383 A US3730383 A US 3730383A
- Authority
- US
- United States
- Prior art keywords
- side wall
- container body
- container
- wall
- punch
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title abstract description 10
- 239000011253 protective coating Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims description 38
- 239000002184 metal Substances 0.000 claims description 38
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 238000010409 ironing Methods 0.000 abstract description 26
- 238000002407 reforming Methods 0.000 abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 11
- 238000000576 coating method Methods 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005034 decoration Methods 0.000 description 4
- 238000012935 Averaging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/12—Cans, casks, barrels, or drums
- B65D1/14—Cans, casks, barrels, or drums characterised by shape
- B65D1/16—Cans, casks, barrels, or drums characterised by shape of curved cross-section, e.g. cylindrical
- B65D1/165—Cylindrical cans
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/30—Deep-drawing to finish articles formed by deep-drawing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
An aluminum container body and a method of forming the same by ironing the side wall of a drawn cup to thin and lengthen it, and reforming the bottom end wall of the ironed cup to form therein an upwardly domed central portion connected through a substantially vertical wall section and an outwardly and upwardly tapered shoulder into the side wall of the can body. The ironed can body may have a protective coating applied to its inner surfaces and cured thereon prior to reforming the end wall.
Description
limited States atet unn et al.
[54] CONTAINER BODY AND A METHOD OF FORMING THE SAME Assignee:
Filed:
Appl. No.: 167,204
Inventors: Lloyd G. Dunn, Lower Burrell;
James R. Morran, New Kinsington; Donald L. Peters, Delmont, all of Aluminum Company of America,
Pittsburgh, Pa.
July 29, 1971 Related US. Application Data Primary Examiner-George E. Lowrance Assistant Examiner-James R. Garrett Attorney-David W. Brownlee 5 7] ABSTRACT An aluminum container body and a method of forming the same by ironing the side wall of a drawn cup to thin and lengthen it, and reforming the bottom end wall of the ironed cup to form therein an upwardly domed central portion connected through a substantially vertical wall section and an outwardly and upwardly tapered shoulder into the side wall of the can body. The ironed can body may have a protective coating applied to its inner surfaces and cured thereon prior to reforming the end wall.
3 Claims, 6 Drawing Figures [62] Division of Ser. No. 856,331, Sept. 9, 1969.
[52] U.S. Cl ..220/66, 220/70 [5 1] Int. Cl. ..B65d 7/42 [58] Field of Search ..220/66, 70, 3; 113/120 H, 120 S [56] References Cited UNITED STATES PATENTS 2,699,596 l/l955 Aronson ..220/3 X PATENTEU 3,730,383
SHEET 1 BF 2 INVENTORS LLOYD 6. DUNN,
JAMES R. MORRAN 8 DONALD L. PETERS A! Iornoy PAIEMEW H 3, 730.383
SHEET 2 UF 2 I I L '30 P76. 6. 40 j j 54 so 36 4f 42 34\ A m v 74 A 64 FIG. 5.
IN VE/V TORS.
LLOYD 6. DUNN, JAMES R. MORRAN 8 DONALD L. PETERS AHornoy CONTAINER BODY AND A METHOD OF FORMING THE SAME This application is a division of parent application Ser. No. 856,331, filed Sept. 9, I969.
BACKGROUND OF THE INVENTION As shown in US. Pat. No. 3,402,554, it is well known to iron the side wall of a drawn cup to thin it and thereby extend the length of the cup, and to reform the end wall of the ironed container to improve its resistance to outward bulging which may result from high pressures in the container. By ironing the side wall of the container and forming a pressure resistant end wall thereon, the formed container may be of a relatively thin gauge and light in weight. It is desirable, however, to further reduce the weight of drawn and ironed containers without sacrificing the strength of such containers.
SUMMARY OF THE INVENTION The invention provides a method of forming a light weight container by ironing the side wall of a drawn aluminum cup and thereafter reforming the bottom end wall of the ironed cup to form an upwardly domed central portion therein connected through a substantially vertical wall section to a rim or shoulder which tapers into the side wall of the can body. Small radii may be provided in the end profile to connect the vertical wall section with the central domed portion and with the tapered shoulder. The drawn cup may be made of a hard temper aluminum alloy, and an interior protective coating, an exterior decorative ink and an overvarnish may be applied and cured on the ironed cup prior to forming the end profile thereon. By this method, a very light weight container body may be formed which has substantial resistance to outward bulging of the end wall of the container.
Accordingly, an object of the invention is to provide a method of forming a light weight, high strength container body.
Another object of the invention is to provide an improved light weight container body.
BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects and advantages of the invention will be more fully understood and appreciated with reference to the following description and drawings appended thereto in which:
FIG. 1 is a sectional elevation view of an ironing punch, drawn aluminum cup and ironing ring;
FIG. 2 is a elevation view in partial section showing an ironed container body;
FIG. 3 is a sectional elevation view of the ironed container body of FIG. 2 positioned on a punch priorto reforming the end wall of the container against a reforming die;
FIG. 4 is an enlarged sectional elevation view similar to FIG. 3 showing a container body in the dies during reforming ofthe containers end wall;
FIG. 5 is a view similar to FIG. 4 showing completion of reforming of the containers end wall; and
FIG. 6 is an elevation view in partial section showing a container body with an end profile formed thereon.
DESCRIPTION OF A PREFERRED MODE Referring to the drawings, FIG. 1 illustrates a drawn cup 10, preferably formed from hard temper aluminum alloy, having an end wall 12 and a side wall 14. Preferably, cup 10 is made of an aluminum base alloy in a state resulting from cold reduction, e.g., rolling, of approximately percent of the thickness of fully recrystallized, e.g., annealed, stock known as H19 temper. An ironing punch 16 for moving 'cup 10 through at least one ironing ring 18 has a forward end 20 for pushing against end wall 12 of the cup 10, and has a rounded corner 22 between its forward end 20 and its side 24. Punch 16 may be hollow to receive a mandrel, now shown, and the end 20 thereof may be centrally recessed to receive means such as a nut, also not shown, for securing the punch to the mandrel and to an ironing press. The radius of rounded corner 22 of punch 16 is large enough to distribute the force of punch 16 against cup 10 around the corner of the cup and thereby avoid high stress concentration at the corner which could tear or rupture the metal along such corner during ironing, but is also small enough to effect ironing of a maximum length of side wall 14. With an excessively large radius at corner 22, an excessive amount of metal in cup 10 would be formed around the radius and not be disposed far enough outwardly to bear against the working surfaces of ironing ring 18 to be thinned during ironing. An excessively large radius at corner 22 may also cause wrinkling around the corner of the container bottom when the end profile is formed. For a 2 /2 inch diameter can, a corner radius of approximately one-quarter inch has been found to work well.
Ironing ring 18, selected for illustration, has an ironing face 26 and a relief portion 28 therebelow, but may be of a variety of other configurations known in the art. Preferably, ironing ring 18 is made of carbide or high carbon steel, is set in a reinforcing ring, not shown, and has an inside diameter a few thousands of an inch less than the diameter of punch 16 plus the double thickness of side wall 14 of cup 10 to squeeze or iron side wall 14 as cup 10 is moved through ring 18. Cup 10 has an inner diameter slightly larger than the outer diameter of punch 16 so that the punch can be readily moved into cup 10 and the air in the cup be exhausted therefrom. A difference of approximately 0.025 inch in such diameters has been found to be adequate for such purposes. A redraw ring, not shown, may be provided anterior to the ironing ring or rings to redraw cup 10 against punch 16 prior to moving through the ironing ring. FIG. 2 shows a container body 30 after ironing. Container 30 has a substantially flat end wall 32 and a side wall 34 having a thickness less than the thickness of end wall 32, and a rounded corner 36 at the junction of the end wall and side wall.
After the side wall of cup 10 has been ironed, an interior protective coating and exterior decoration in the form of ink and an overvarnish may be applied on the ironed cup and cured thereon. The interior coating is adapted to protect the contents of container 30 against reaction with the metal of the container, and may be applied to the interior surfaces of the ironed container, by spraying or the like as is well known in the art. Coatings for such product protection may be any of a variety of known thermosetting compositions including the epoxy, vinyl and acrylic resins, among others. The decoration for the exterior surfaces of the container may be applied by means of rollers, and an overvarnish sprayed, brushed or rolled thereover. It is noted that such decoration can be applied to substantially the full length of the side wall of the ironed container body to the top of rounded corner 36 thereon. The protective coating and overvarnish can be cured on a container by controlled heating of the same, for example, by controlled heating in an oven, not shown, or by other means and methods well known in the art. Such curing may be effected at a temperature in the range of 300 to 600 F or greater, maintained for 2 to 30 or more minutes. Controlled heating of a container 30 reduces the temper of, or partially anneals, the metal in the container, with the higher temperatures and longer curing times effecting greater reductions in the temper of the metal container. Generally speaking, a harder temper alloy before curing, will also usually result in a harder final temper alloy after heating at a particular temperature for a specified time. Different alloys will, of course, react differently to heat. Commencing with a typical aluminum alloy in a full hard condition, it has been found that curing of a protective coating thereon by heating it to approximately 400 F for 20 minutes will reduce the temper and yield strength of the alloy by approximately percent with corresponding increase in the workability of the metal. With more rapid curing, the reduction in temper may be in the range of 5 per cent or less.
While it is desirable to have a coated container having a hard temper, the present invention takes advantage of the reduction in temper of the metal during curing of coatings thereon, regardless of the degree of such reduction in temper, by forming the end profile on the can after such curing. By forming the end profile after heating the container to cure a coating thereon, the softer or partially annealed metal is more easily formed into a rigid, pressure resistant profile having small radii in its configuration, without fracture or rupture of the metal in the profile. Coating the interior surfaces of the can prior to forming the end profile also assures complete coating of the surfaces since the surfaces are all well exposed, with no sharp corners or vertical interior walls as exist in a formed profile. Furthermore, the interior and exterior coatings act as lubricants for forming the end profile and may reduce or eliminate the need for additional lubricants which would have to be removed after forming of the profile. The coatings also reduce or eliminate metal build-up on the reforming tools.
After the coating or coatings have been cured on the surfaces of container 30, the end of the ironed container body 30 is reformed by means of a reforming punch 40 which is moved into container body 30 and the body moved against a reforming die 42 as illustrated in FIGS. 3 through 5. Reforming punch 40 preferably has a diameter slightly less than the inside diameter of container body 30 so that the punch can be readily moved into the container body. In the practice of the invention, it has been found that a difference of approximately 0.010 to 0.020 inch in the diameters of the punch 40 and container body 30 is sufficient for insertion of the punch into the container body without difficulty. Punch 40 has a recessed end 44 with an annular rim 46 therearound which tapers into the side of the punch at 48. Reforming die 42 comprises a central seat portion 50 and an annular ring 52 therearound. Seat portion 50 is in the form of a cylinder having an upwardly domed end 54 for forming end wall 32 of container 30 inwardly into recess 44 in punch 40, and is rigidly supported. Annular ring 52 is positioned in an enclosure 56 around its base which forms an air chamber 58 under ring 52. Air chamber 58 is sealed and has sufficient air pressure therein, approximately 40 pounds per square inch gauge for a ring 52 having the bottom surface area of the preferred embodiment, to resiliently support ring 52. Springs or other resilient means could be used in lieu of the air support for ring 52. As illustrated, ring 52 has a throat portion 60 for containing or restraining side wall 34 of container 30 during forming of an end profile, and an inwardly tapered shoulder 62 for forming the end wall of container 30 against punch 40. Tapered shoulders 62 on ring 52 and 48 on punch 40 are parallel, and in the preferred embodiment form an angle A of 53 with the horizontal (FIG. 5). Inasmuch as throat 60 does not work or form side wall 34 of container 30, but only restrains it from bulging, the throat has a diameter slightly larger than the diameter of punch 40 plus the double thickness of the side wall of container 30 to assure a small clearance therebetween.
When punch 40 with container body 30 thereon is moved against reforming die 42, end wall 32 is drawn upward into recess 44 by seat 50 before rounded corner 36 on container body 30 is completely flattened between tapered shoulders 48 and 62. As shown in FIG. 4, this permits the slack metal over tapered shoulder 48 on punch 40 to be drawn inwardly by seat 50 into the center of the end profile on container 30. Utilizing the slack or extra metal around corner 36 in forming the upwardly domed central portion of the end profile facilitates the formation of a vertical wall section and sharp radii in the end profile as will be hereinafter described. If rounded corner 36 were completely flattened and squeezed between die shoulders 48 and 62 prior to at least partial drawing of end wall 32 into recess 44, the slack metal at this corner would be driven or forced up the side of punch 40 and could not be drawn into the center of the end profile by seat 50. Drawing of such slack metal into the upwardly domed central portion of the end profile is assured by positioning the domed end 54 of seat 50 by means of die stops and controls, not shown, so that it contacts end wall 32 either approximately simultaneously with, or prior to, contact of tapered die shoulder 62 against corner 36 on can body 30.
After the slack metal in corner 36 is drawn into the center of the container end, further travel of punch 40 completely flattens and squeezes corner 36 between tapered die shoulders 48 and 62 to form a tapered shoulder 64 on the container. Thereafter, with tapered shoulder 64 rightly held and restrained between die surfaces 48 and 62, annular ring 52 moves downward with punch 40. The final travel of punch 40 draws the metal in the end wall tightly around domed end 54 of the punch and forms an upwardly domed central portion 66 and a vertical wall section 68 in the end profile. Two small radii 70 and 72 at the ends of wall section 68, connect such section with shoulder 64 and central domed portion 66 (FIG. 6). Wall section 68 may be of varying lengths but it is always relatively short and only a few thousands of an inch long to minimize loss of container volume. A third small radius 74 is also formed between shoulder 64 and side wall 34 of container 30.
There is little, if any, thinning of the end wall of the container during drawing of the metal over seat50. The additional metal required for forming upwardly domed central portion 66 comes from the slack metal in corner 36 as shown in FIG. 3 prior to reforming of the end wall. Referring to FIG. 6, the thinner gauge of container side wall 34 begins at least continguous container shoulder 64, and preferably extends into such shoulder 64, This is achieved through the use of a reasonably small radius on ironing punch 16 to form a similar radius on container corner 36 during ironing, and drawing of slack metal around corner 36 into the center of the end profile rather than pushing such metal up the side of the punch during reforming. Maximum utilization of the metal is thereby effected to strengthen the end profile of the container body. Moreover, since the side wall of container body 30 was decorated to the top of corner 36 on cup 30 prior to forming the end profile thereon, such decoration will extend at least to the-top of tapered shoulder 64 of the formed profile, and preferably extends around radius 74 and into shoulder 64 to give such a container an aesthetically pleasing appearance. After the end wall of the container body is reformed, punch 40 is moved upward and the container body is removed therefrom. Container body 30 is then ready for necking, flanging, and other operations to be performed before final use.
In reforming the end of container body by the present invention, tapered shoulder 64 effectively reduces the area of end wall which must withstand the internal pressures of the container. The smaller the area of the end wall that faces upwardly against such internal pressures, the less will be the total force against such end wall which could cause the end wall to dome outwardly. If, however, the can end tapers too far inwardly, the can may not have satisfactory stability inasmuch as a can having too small a diameter for the rim on which it sits may fall over when tilted on a relatively small angle. Accordingly, a base diameter has been selected which will provide both stability and strength.
Among the advantages of the present invention, it is believed that straight angular section or leg 68 with relatively small radii 70 and 72 connecting the section with shoulder 64 and domed portion 66 provide rigidity to the end wall to prevent flexing or bulging thereof. Inwardly domed portion 66 acts as an arch to resist outward bulging. As an example of a container body formed by the present invention, cans for containing 12 ounces of liquid, 4.812 inches in height and 2.675 inches in diameter were formed from a hard temper aluminum alloy 0.012 inch thick, and end profiles were formed on the cans having a base angle A on taper 64 as shown in FIG. 4 of 53, radii 70 and 72 of 0.04inch and a base diameter of 2.03 inches. Side wall 34 of these cans was approximately 0.0045 inch thick, starting approximately 0.l25 inch below radius 74 on side wall 34. These can bodies had good stability when filled with liquid and withstood internal pressures in the range of 90 to 95 p.s.i.g. without outward bulging of the end profile.
As presently appreciated, the biggest advantage of this development is that it facilitates the production of very light weight can bodies having substantial end wall strength against outward bulging or doming. The light weight of the can bodies is primarily a result of the ability to use a thinner gauge metal for forming the drawn cup from which the can bodies are formed. Using a thinner gauge metal results in a thinner gauge in the bottom of the container body produced therefrom, as well as a thinner gauge in the side wall of the container body. Prior to this invention, drawn cups for aluminum cans were formed from sheet aluminum of 0.016 inch gauge or thicker in order to produce strong enough end walls on the cans as provided by the relatively thick gauge of metal in the end walls, whereas the present invention permits the use of aluminum sheet in the range of 0.012 to 0.014 inch, depending on the alloy and temper, for producing cans having a high resistance to bulging of the end walls thereof. Thicker sheet can also obviously be used, but such thicker sheet is not necessary for producing a can body of the desired strength. The present invention makes the use of thinner sheet metal possible by ironing the can body using a first punch, and then forming an end profile on the can body using a second forming punch. By using two separate punches, the punch which forms the end profile can have much sharper radii and form a much stronger profile structurally than it could if it were to be employed both in the ironing operation and the forming operation. By using two separate punches, the slack metal around the corner on the ironed can body on the first punch can also be reformed into the final end profile which is formed on the second punch as discussed above. The increase in the structural strength of the profile produced by such forming permits the use of a thinner gauge of metal in the end wall and therefore a thinner gauge for the sheet from which the containers are formed.
The present invention further permits the use of a thinner gauge sheet from which container bodies are formed by taking advantage of the reduction in the temper of the hard temper alloy during curing of the coating on the container body. By forming the end profile after such curing, the end profile can be formed with a vertical wall section therein and small radii which increase the strength of the end profile against outward doming. If the end profile were formed prior to curing, the harder uncoated metal could not be formed into as strong a profile, and the metal would have to be thicker in order to resist pressures in the container without bulging. Forming after curing also'effects an increase in, or recovery of, temper of the metal. For example, a can body originally in a full hard condition which is heated during curing, with anattendant reduction in the temper of the metal by approximately 15 percent, will have the metal in the critical areas which are worked, such as around radii and 72, hardened or re-tempered to approximately -95 percent of the original full hard condition when the can end profile is formed after such'curing. Consequently, with the stronger profile and recovery of part of the metal strength which was lost during curing, a thinner I end wall will have as much resistance to outward bulging as did many previously formed end walls of substantially greater thickness. By way of comparison, the 12 ounce cans described above which were formed by the method of present invention using 0.012 inch thick sheet weigh approximately 26 pounds per 1,000 cans and have side wall thicknesses averaging 0.0045 inch, whereas 12 ounce aluminum cans presently on the market with the same performance with regard to internal pressures, weigh 34 pounds or more per 1,000 cans and have side wall thicknesses of 0.006 inch or more. Twelve ounce cans formed in accordance with the invention from 0.014 inch aluminum sheet weigh approximately 28.5 pounds per 1,000 cans and have side wall thicknesses averaging 0.0047 inch.
While the invention has been described and several practices for the employment thereof have been set forth, it will be obvious to those skilled in the art that many modifications of the invention are possible without departing from the scope thereof. For example, the invention includes within its scope ironing the side wall of a drawn cup using a first punch having a rounded corner around its forward end, and then form- 'ing the end profile on the ironed cup without heating heating could be effected either before ironing or after ironing and before the profile is formed.
Having thus described my invention and certain embodiments thereof, 1 claim:
1. A lightweight metal container body comprising a side wall and a bottom end wall which is substantially thicker than the side wall, said bottom wall having an upwardly domed central portion therein with a substantially vertical wall section extending downward from the periphery of the domed portion to an outwardly and upwardly flaring frusto-conical shoulder leading into the side wall of the container body said bottom end wall including small bend radii connecting said vertical wall section to said central domed portion and to said flaring shoulder and a bend radius connecting and flaring shoulder to said side wall, and the thinner metal of said side wall extending a substantial distance within said flaring shoulder 2. A container body as set forth in claim 1 having a protective coating cured on its inner surfaces.
3. A container body as set forth in claim 2 which is made of an aluminum alloy and, as formed, is in a condition equivalent to at least percent of a full hard condition.
Claims (3)
1. A lightweight metal container body comprising a side wall and a bottom end wall which is substantially thicker than the side wall, said bottom wall having an upwardly domed central portion therein with a substantially vertical wall section extending downward from the periphery of the domed portion to an outwardly and upwardly flaring frusto-conical shoulder leading into the side wall of the container body said bottom end wall including small bend radii connecting said vertical wall section to said central domed portion and to said flaring shoulder and a bend radius connecting and flaring shoulder to said side wall, and the thinner metal of said side wall extending a substantial distance within said flaring shoulder .
2. A container body as set forth in claim 1 having a protective coating cured on its inner surfaces.
3. A container body as set fortH in claim 2 which is made of an aluminum alloy and, as formed, is in a condition equivalent to at least 85 percent of a full hard condition.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16720471A | 1971-07-29 | 1971-07-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3730383A true US3730383A (en) | 1973-05-01 |
Family
ID=22606382
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00167204A Expired - Lifetime US3730383A (en) | 1971-07-29 | 1971-07-29 | Container body and a method of forming the same |
Country Status (1)
Country | Link |
---|---|
US (1) | US3730383A (en) |
Cited By (54)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3861433A (en) * | 1973-09-17 | 1975-01-21 | Plastofilm Ind Inc | Air tight food container |
US3904069A (en) * | 1972-01-31 | 1975-09-09 | American Can Co | Container |
US3942673A (en) * | 1974-05-10 | 1976-03-09 | National Can Corporation | Wall construction for containers |
US3971361A (en) * | 1974-07-15 | 1976-07-27 | General Electric Company | Low thermal mass cooking utensil |
US4151927A (en) * | 1974-07-12 | 1979-05-01 | Reynolds Metals Company | Container construction |
US4165011A (en) * | 1977-09-09 | 1979-08-21 | The Continental Group, Inc. | Bonded can top |
EP0005025A2 (en) * | 1978-04-26 | 1979-10-31 | Ball Corporation | Lightweight metal container |
US4181219A (en) * | 1979-02-01 | 1980-01-01 | Maryland Cup Corporation | Container having premium-containing-and-dispensing bottom structure and method and apparatus for providing same |
US4222494A (en) * | 1977-03-04 | 1980-09-16 | Reynolds Metals Company | Container |
US4294373A (en) * | 1978-11-20 | 1981-10-13 | Ball Corporation | Lightweight metal container |
WO1983002577A1 (en) * | 1982-02-02 | 1983-08-04 | Claydon, Paul, Charles | Method of forming containers |
US4515284A (en) * | 1980-08-21 | 1985-05-07 | Reynolds Metals Company | Can body bottom configuration |
US4522049A (en) * | 1983-03-14 | 1985-06-11 | Aluminum Company Of America | Aluminum alloy food can body and method for making same |
US4523433A (en) * | 1981-05-25 | 1985-06-18 | Nippon Light Metal Co., Ltd. | Cold storage body |
US4651890A (en) * | 1986-05-07 | 1987-03-24 | Coker Gregory F | Beverage can wipe stored in pouch affixed to can |
US4723433A (en) * | 1986-01-28 | 1988-02-09 | Adolph Coors Company | Method and apparatus for doming can bottoms |
US4834256A (en) * | 1987-07-31 | 1989-05-30 | Pac International, Inc. | Can with domed bottom structure |
US4919294A (en) * | 1988-04-06 | 1990-04-24 | Mitsubishi Jukogyo Kabushiki Kaisha | Bottom structure of a thin-walled can |
US4953738A (en) * | 1988-02-19 | 1990-09-04 | Stirbis James S | One piece can body with domed bottom |
US4989434A (en) * | 1989-08-09 | 1991-02-05 | Adolph Coors Company | Method and apparatus for doming can bottoms |
DE3930937A1 (en) * | 1989-09-15 | 1991-03-28 | Schmalbach Lubeca | TWO-PIECE METAL DRINKING CAN |
US5016463A (en) * | 1988-02-05 | 1991-05-21 | Coors Brewing Company | Apparatus and method for forming can bottoms |
US5325696A (en) * | 1990-10-22 | 1994-07-05 | Ball Corporation | Apparatus and method for strengthening bottom of container |
USD384859S (en) * | 1996-07-16 | 1997-10-14 | Cundieff Larry C | Shot glass |
USD387622S (en) * | 1996-05-02 | 1997-12-16 | Young Hoon Lee | Container with lips |
US5836473A (en) * | 1990-04-06 | 1998-11-17 | Ball Corporation | Beverage container with increased bottom strength |
WO1999062765A1 (en) | 1998-06-03 | 1999-12-09 | Crown Cork & Seal Technologies Corporation | Can bottom having improved strength and apparatus for making same |
US6471629B1 (en) * | 1998-12-03 | 2002-10-29 | Aliseo Gentile | Tooling for forming packaging from unitary blanks |
DE102013114007A1 (en) * | 2013-12-13 | 2015-06-18 | Ball Europe Gmbh | Process for the pretreatment of a can body made from a metal sheet |
WO2017151667A1 (en) * | 2016-02-29 | 2017-09-08 | Crown Packaging Technology, Inc. | Concave can end |
USD826003S1 (en) | 2014-08-29 | 2018-08-21 | Yeti Coolers, Llc | Beverage holder |
USD830788S1 (en) | 2017-02-27 | 2018-10-16 | Yeti Coolers, Llc | Beverage holder |
USD830787S1 (en) | 2017-02-27 | 2018-10-16 | Yeti Coolers, Llc | Beverage holder |
USD839049S1 (en) | 2016-06-22 | 2019-01-29 | Yeti Coolers, Llc | Cup |
USD839677S1 (en) * | 2015-08-31 | 2019-02-05 | Yeti Coolers, Llc | Cup |
USD839676S1 (en) * | 2015-08-31 | 2019-02-05 | Yeti Coolers, Llc | Cup |
USD842038S1 (en) | 2016-06-22 | 2019-03-05 | Yeti Coolers, Llc | Cup |
USD856084S1 (en) * | 2016-10-31 | 2019-08-13 | Hiit Bottle, Llc | Fluid container |
USD882343S1 (en) | 2017-03-17 | 2020-04-28 | Yeti Coolers, Llc | Cup |
USD899862S1 (en) | 2017-12-08 | 2020-10-27 | Yeti Coolers, Llc | Cup |
US10835067B2 (en) | 2017-02-27 | 2020-11-17 | Yeti Coolers, Llc | Beverage holder |
USD909818S1 (en) | 2018-08-03 | 2021-02-09 | Yeti Coolers, Llc | Mug |
USD911779S1 (en) | 2018-08-03 | 2021-03-02 | Yeti Coolers, Llc | Mug |
USD934633S1 (en) | 2018-11-08 | 2021-11-02 | Yeti Coolers, Llc | Cup |
USD935278S1 (en) | 2018-11-09 | 2021-11-09 | Yeti Coolers, Llc | Cup |
USD946346S1 (en) | 2020-07-09 | 2022-03-22 | Miir Holdings, Llc | Lid with straw |
USD946352S1 (en) | 2020-07-02 | 2022-03-22 | Miir Holdings, Llc | Cup with lid |
USD992855S1 (en) * | 2022-01-21 | 2023-07-18 | Jian Yue | Urn for human ashes |
USD1000199S1 (en) | 2021-05-25 | 2023-10-03 | Miir Holdings, Llc | Combined lid with mouthpiece and cap |
USD1003112S1 (en) * | 2021-04-20 | 2023-10-31 | William Huckestein | Calibrated coffee glass |
USD1011845S1 (en) * | 2021-10-25 | 2024-01-23 | Kanga, LLC | Insulated beverage container |
USD1011844S1 (en) * | 2021-10-25 | 2024-01-23 | Kanga, LLC | Insulated beverage container |
USD1015803S1 (en) | 2021-05-25 | 2024-02-27 | Miir Holdings, Llc. | Lid for cup |
USD1016560S1 (en) * | 2017-02-23 | 2024-03-05 | Brumate, Inc. | Beverage container |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2699596A (en) * | 1948-06-09 | 1955-01-18 | Union Carbide & Carbon Corp | Process of making gas pressure cylinders having walls with improved uniformity in thickness |
US3268620A (en) * | 1962-07-11 | 1966-08-23 | American Can Co | Coating for a metal surface containing polyvinyl chloride resins, epoxidized polybutadiene, urea-formaldehyde resin, and a methylol phenol ether |
US3272383A (en) * | 1965-07-08 | 1966-09-13 | Harvey Aluminum Inc | One-piece extruded container for canning |
US3423985A (en) * | 1966-02-04 | 1969-01-28 | Stolle Corp | Stripper and pre-draw ring for wall-ironing can bodies |
AT272187B (en) * | 1965-10-24 | 1969-06-25 | Continental Can Co | Containers, in particular cans for contents packed under positive pressure |
-
1971
- 1971-07-29 US US00167204A patent/US3730383A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2699596A (en) * | 1948-06-09 | 1955-01-18 | Union Carbide & Carbon Corp | Process of making gas pressure cylinders having walls with improved uniformity in thickness |
US3268620A (en) * | 1962-07-11 | 1966-08-23 | American Can Co | Coating for a metal surface containing polyvinyl chloride resins, epoxidized polybutadiene, urea-formaldehyde resin, and a methylol phenol ether |
US3272383A (en) * | 1965-07-08 | 1966-09-13 | Harvey Aluminum Inc | One-piece extruded container for canning |
AT272187B (en) * | 1965-10-24 | 1969-06-25 | Continental Can Co | Containers, in particular cans for contents packed under positive pressure |
US3423985A (en) * | 1966-02-04 | 1969-01-28 | Stolle Corp | Stripper and pre-draw ring for wall-ironing can bodies |
Cited By (75)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3904069A (en) * | 1972-01-31 | 1975-09-09 | American Can Co | Container |
US3861433A (en) * | 1973-09-17 | 1975-01-21 | Plastofilm Ind Inc | Air tight food container |
US3942673A (en) * | 1974-05-10 | 1976-03-09 | National Can Corporation | Wall construction for containers |
US4151927A (en) * | 1974-07-12 | 1979-05-01 | Reynolds Metals Company | Container construction |
US3971361A (en) * | 1974-07-15 | 1976-07-27 | General Electric Company | Low thermal mass cooking utensil |
US4222494A (en) * | 1977-03-04 | 1980-09-16 | Reynolds Metals Company | Container |
US4165011A (en) * | 1977-09-09 | 1979-08-21 | The Continental Group, Inc. | Bonded can top |
EP0005025A2 (en) * | 1978-04-26 | 1979-10-31 | Ball Corporation | Lightweight metal container |
EP0005025A3 (en) * | 1978-04-26 | 1979-11-14 | Ball Corporation | Lightweight metal container |
US4294373A (en) * | 1978-11-20 | 1981-10-13 | Ball Corporation | Lightweight metal container |
US4181219A (en) * | 1979-02-01 | 1980-01-01 | Maryland Cup Corporation | Container having premium-containing-and-dispensing bottom structure and method and apparatus for providing same |
US4515284A (en) * | 1980-08-21 | 1985-05-07 | Reynolds Metals Company | Can body bottom configuration |
US4523433A (en) * | 1981-05-25 | 1985-06-18 | Nippon Light Metal Co., Ltd. | Cold storage body |
US4885924A (en) * | 1982-02-02 | 1989-12-12 | Metal Box P.L.C. | Method of forming containers |
WO1983002577A1 (en) * | 1982-02-02 | 1983-08-04 | Claydon, Paul, Charles | Method of forming containers |
US4522049A (en) * | 1983-03-14 | 1985-06-11 | Aluminum Company Of America | Aluminum alloy food can body and method for making same |
US4723433A (en) * | 1986-01-28 | 1988-02-09 | Adolph Coors Company | Method and apparatus for doming can bottoms |
US4651890A (en) * | 1986-05-07 | 1987-03-24 | Coker Gregory F | Beverage can wipe stored in pouch affixed to can |
US4834256A (en) * | 1987-07-31 | 1989-05-30 | Pac International, Inc. | Can with domed bottom structure |
US5016463A (en) * | 1988-02-05 | 1991-05-21 | Coors Brewing Company | Apparatus and method for forming can bottoms |
US4953738A (en) * | 1988-02-19 | 1990-09-04 | Stirbis James S | One piece can body with domed bottom |
JP2647485B2 (en) | 1988-04-06 | 1997-08-27 | 三菱重工業株式会社 | Bottom structure of thin can |
US4919294A (en) * | 1988-04-06 | 1990-04-24 | Mitsubishi Jukogyo Kabushiki Kaisha | Bottom structure of a thin-walled can |
US4989434A (en) * | 1989-08-09 | 1991-02-05 | Adolph Coors Company | Method and apparatus for doming can bottoms |
DE3930937A1 (en) * | 1989-09-15 | 1991-03-28 | Schmalbach Lubeca | TWO-PIECE METAL DRINKING CAN |
US5836473A (en) * | 1990-04-06 | 1998-11-17 | Ball Corporation | Beverage container with increased bottom strength |
US5524468A (en) * | 1990-10-22 | 1996-06-11 | Ball Corporation | Apparatus and method for strengthening bottom of container |
US5325696A (en) * | 1990-10-22 | 1994-07-05 | Ball Corporation | Apparatus and method for strengthening bottom of container |
EP0899199A2 (en) | 1990-10-22 | 1999-03-03 | Ball Corporation | Apparatus and method for strengthening bottom of container |
USD387622S (en) * | 1996-05-02 | 1997-12-16 | Young Hoon Lee | Container with lips |
USD384859S (en) * | 1996-07-16 | 1997-10-14 | Cundieff Larry C | Shot glass |
WO1999062765A1 (en) | 1998-06-03 | 1999-12-09 | Crown Cork & Seal Technologies Corporation | Can bottom having improved strength and apparatus for making same |
US6131761A (en) * | 1998-06-03 | 2000-10-17 | Crown Cork & Seal Technologies Corporation | Can bottom having improved strength and apparatus for making same |
US6220073B1 (en) | 1998-06-03 | 2001-04-24 | Crown Cork & Seal Technologies Corporation | Can bottom having improved strength and apparatus for making same |
US6471629B1 (en) * | 1998-12-03 | 2002-10-29 | Aliseo Gentile | Tooling for forming packaging from unitary blanks |
DE102013114007A1 (en) * | 2013-12-13 | 2015-06-18 | Ball Europe Gmbh | Process for the pretreatment of a can body made from a metal sheet |
USD826003S1 (en) | 2014-08-29 | 2018-08-21 | Yeti Coolers, Llc | Beverage holder |
USD997654S1 (en) | 2014-08-29 | 2023-09-05 | Yeti Coolers, Llc | Beverage holder |
USD829058S1 (en) | 2014-08-29 | 2018-09-25 | Yeti Coolers, Llc | Beverage holder |
USD920746S1 (en) | 2014-08-29 | 2021-06-01 | Yeti Coolers, Llc | Beverage holder |
USD888505S1 (en) | 2014-08-29 | 2020-06-30 | Yeti Coolers, Llc | Beverage holder |
USD839677S1 (en) * | 2015-08-31 | 2019-02-05 | Yeti Coolers, Llc | Cup |
USD839676S1 (en) * | 2015-08-31 | 2019-02-05 | Yeti Coolers, Llc | Cup |
US10850888B2 (en) | 2016-02-29 | 2020-12-01 | Crown Packaging Technology, Inc. | Concave can end |
WO2017151667A1 (en) * | 2016-02-29 | 2017-09-08 | Crown Packaging Technology, Inc. | Concave can end |
CN108778939A (en) * | 2016-02-29 | 2018-11-09 | 皇冠包装技术公司 | Spill can end |
CN108778939B (en) * | 2016-02-29 | 2021-05-25 | 皇冠包装技术公司 | Concave can end |
USD839049S1 (en) | 2016-06-22 | 2019-01-29 | Yeti Coolers, Llc | Cup |
USD842038S1 (en) | 2016-06-22 | 2019-03-05 | Yeti Coolers, Llc | Cup |
USD856084S1 (en) * | 2016-10-31 | 2019-08-13 | Hiit Bottle, Llc | Fluid container |
USD1016560S1 (en) * | 2017-02-23 | 2024-03-05 | Brumate, Inc. | Beverage container |
US10835067B2 (en) | 2017-02-27 | 2020-11-17 | Yeti Coolers, Llc | Beverage holder |
USD830787S1 (en) | 2017-02-27 | 2018-10-16 | Yeti Coolers, Llc | Beverage holder |
USD830788S1 (en) | 2017-02-27 | 2018-10-16 | Yeti Coolers, Llc | Beverage holder |
USD882343S1 (en) | 2017-03-17 | 2020-04-28 | Yeti Coolers, Llc | Cup |
USD899862S1 (en) | 2017-12-08 | 2020-10-27 | Yeti Coolers, Llc | Cup |
USD1011842S1 (en) | 2017-12-08 | 2024-01-23 | Yeti Coolers, Llc | Cup |
USD909818S1 (en) | 2018-08-03 | 2021-02-09 | Yeti Coolers, Llc | Mug |
USD911779S1 (en) | 2018-08-03 | 2021-03-02 | Yeti Coolers, Llc | Mug |
USD1022602S1 (en) | 2018-08-03 | 2024-04-16 | Yeti Coolers, Llc | Mug |
USD979340S1 (en) | 2018-08-03 | 2023-02-28 | Yeti Coolers, Llc | Mug |
USD934633S1 (en) | 2018-11-08 | 2021-11-02 | Yeti Coolers, Llc | Cup |
USD935278S1 (en) | 2018-11-09 | 2021-11-09 | Yeti Coolers, Llc | Cup |
USD982386S1 (en) | 2020-07-02 | 2023-04-04 | Miir Holdings, Llc | Lid |
USD981788S1 (en) | 2020-07-02 | 2023-03-28 | Miir Holdings, Llc | Cup |
USD946352S1 (en) | 2020-07-02 | 2022-03-22 | Miir Holdings, Llc | Cup with lid |
USD1015063S1 (en) | 2020-07-09 | 2024-02-20 | Miir Holdings, Llc | Lid |
USD1019264S1 (en) | 2020-07-09 | 2024-03-26 | Miir Holdings Llc | Straw |
USD946346S1 (en) | 2020-07-09 | 2022-03-22 | Miir Holdings, Llc | Lid with straw |
USD1003112S1 (en) * | 2021-04-20 | 2023-10-31 | William Huckestein | Calibrated coffee glass |
USD1000199S1 (en) | 2021-05-25 | 2023-10-03 | Miir Holdings, Llc | Combined lid with mouthpiece and cap |
USD1015803S1 (en) | 2021-05-25 | 2024-02-27 | Miir Holdings, Llc. | Lid for cup |
USD1011845S1 (en) * | 2021-10-25 | 2024-01-23 | Kanga, LLC | Insulated beverage container |
USD1011844S1 (en) * | 2021-10-25 | 2024-01-23 | Kanga, LLC | Insulated beverage container |
USD992855S1 (en) * | 2022-01-21 | 2023-07-18 | Jian Yue | Urn for human ashes |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3730383A (en) | Container body and a method of forming the same | |
US3760751A (en) | Container body and a method of forming the same | |
US4641761A (en) | Increased strength for metal beverage closure through reforming | |
US4559801A (en) | Increased strength for metal beverage closure through reforming | |
US3998174A (en) | Light-weight, high-strength, drawn and ironed, flat rolled steel container body method of manufacture | |
US4685322A (en) | Method of forming a drawn and redrawn container body | |
US5522248A (en) | Method of forming a metal container body | |
US4885924A (en) | Method of forming containers | |
JP3418628B2 (en) | Pressure-resistant sheet metal closing member, molding method and molding apparatus for the member | |
US4808052A (en) | Method and apparatus for forming container end panels | |
US6460723B2 (en) | Metallic beverage can end | |
US4715208A (en) | Method and apparatus for forming end panels for containers | |
US5046637A (en) | Can end shells | |
US3924437A (en) | Process for the non-cutting production of sheet steel containers | |
US4109599A (en) | Method of forming a pressure resistant end shell for a container | |
US3638597A (en) | Method of forming a rivet | |
US5502995A (en) | Method and apparatus for forming a can shell | |
US20060010957A1 (en) | Method and apparatus for making a can lid shell | |
US5351852A (en) | Base profile for a drawn container | |
US4405058A (en) | Container | |
US4485663A (en) | Tool for making container | |
JPS59178139A (en) | Aluminum alloy can body for food and manufacture thereof | |
US4412440A (en) | Process for making container | |
US6079249A (en) | Methods and apparatus for forming a beaded can end | |
EP0103074A2 (en) | Increased strenght for metal closures through reversing curved segments |