EP0151298A2 - Deckel für Dose - Google Patents

Deckel für Dose Download PDF

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Publication number
EP0151298A2
EP0151298A2 EP84115831A EP84115831A EP0151298A2 EP 0151298 A2 EP0151298 A2 EP 0151298A2 EP 84115831 A EP84115831 A EP 84115831A EP 84115831 A EP84115831 A EP 84115831A EP 0151298 A2 EP0151298 A2 EP 0151298A2
Authority
EP
European Patent Office
Prior art keywords
panel
shell
blank
curl
wall
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.)
Granted
Application number
EP84115831A
Other languages
English (en)
French (fr)
Other versions
EP0151298A3 (en
EP0151298B1 (de
Inventor
Henry C. Bachmann
Omar L. Brown
Ermal C. Fraze
James R. Gregg
David K. Wynn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dayton Reliable Tool and Manufacturing Co
Original Assignee
Dayton Reliable Tool and Manufacturing Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dayton Reliable Tool and Manufacturing Co filed Critical Dayton Reliable Tool and Manufacturing Co
Publication of EP0151298A2 publication Critical patent/EP0151298A2/de
Publication of EP0151298A3 publication Critical patent/EP0151298A3/en
Application granted granted Critical
Publication of EP0151298B1 publication Critical patent/EP0151298B1/de
Priority to SG87691A priority Critical patent/SG87691G/en
Expired legal-status Critical Current

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Classifications

    • 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
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/44—Making closures, e.g. caps

Definitions

  • This invention relates to metal shells used to form ends of can type containers.
  • Most can type containers for example beer cans and soft drink cans, are required to withstand internal pressure, rough handling, and substantial temperature differences, yet maintain a complete hermetic seal to protect the contents of the can.
  • Cans of this type are used in very large volumes, billions of cans per year, and at present the metal most used for this purpose is aluminum due to its light weight, comparative inexpensiveness and workability.
  • the typical modern can consists of a unitary deep drawn body, usually with a necked inward throat at the top which terminates in an outwardly extending body curl, and an end for the can which comprises the shell (to which the present invention pertains, provided witn self-opening structure such as tear tabs and related score lines in the shell.
  • the sheils are manufactured from sheet metal by severing a suitable blank from a strip thereof, forming the blank to define a central panel surrounded by a reinforcing countersink and chuck wall configuration, and a shell curl which is designed to interact with the body curl in seaming apparatus to attach the end to the can with the requisite hermetic seal.
  • the underside of the shell or end curl is provided with a sealing compound to assist in the formation of the seal.
  • the shell is the basic part of the end and is formed from the blanks, then the shells are operated upon in converting apparatus which adds the desired score lines, tear tab, and the integral rivet attachment between the shell and the tab, all in known manner.
  • the sealing compound may be applied to the underside of the shell, specifically to the downward facing or bottom portion of the shell curl, either before the converting operation, or after, the former being more typical.
  • a blank is severed from sheet material, usually steel or aluminum, and it is then formed to a shape comprising a generally flat central panel and a chuck wall extending, in this initial stage, upwardly and outwardly from the central panel, blending into a curved flanged portion.
  • the blank is formed to include a groove around the central panel inward from the chuck wall. This initial blank is then subjected to a curling operation to form a curled edge on the flange, the curled edge being turned somewhat under the flanged portion.
  • the partially formed shells are fed through further tooling where they are gripped in the flange portion, while the curled edge is protected in the tooling against deformation. If the groove is already in the blank, then the groove may be reformed. If not, the thus clamped blank is moved against a stationary support applied against the major underside of the central panel.
  • the formation of the end shells according to the prior art requires a three stage operation, and the above described formation of a reinforeing channel shape into the shel results from a working of a band of the metal blank between the chuck wall and the central panel which is essentially uncontrolled and thus susceptible to breaks, distortion, or potential thinning of the shell at this critical point in its structure.
  • prior art shells are subject to a condition in the region of the peripheral flange and curled edge which is known in the art as "earring".
  • ears When the blank of metal is severed from the supply strip, usually a strip withdrawn from a roll thereof, prior practice is to cut or sever a round blank, and little attention is given to the grain direction of the metal, which runs lengthwise of the strip. It has been known for some time, but apparently uncorrected, that forming of the metal (particularly thin aluminum) in operations which are intended to produce a round shell, results in some distortion of the shape from the initial round blank, because the metal tends to stretch slightly more with the grain than across the grain, and to stretch even further at 45° to the grain.
  • Tne result of such uneven "growth" of the metal appears as a slight deformation in the edge of the blank which is subjected to the curling operation.
  • the curled under edge thus is somewhat closer to the chuck wall in certain areas than in others around the shell; i.e. the end curl becomes irregular with respect to the chuck wall.
  • the design may accommodate for the enlargement of the "earrings", such that the edge between such earrings is completely tucked under the body curl during seaming.
  • This leaves an excess of metal in the cover or end hook extending into the seam in the region where the earrings exist, and this can lead to puncturing of the thin can body in the region of the neck, or to wrinkling of the excessive material within the curled seam, thereby destroying the uniformity of the seam.
  • the tendency is to have an unacceptably great percentage of cans which leak after they have been filled and sealed. This of course is unacceptable from the standpoint that the packaged product is lost, and additional damage from spillage, etc. may also result.
  • the present invention therefore, provides a method and apparatus whereby the aforementioned earring problem is essentially overcome, and furthermore in which a shell is provided having more uniform thickness throughout its extent, including the requisite chuck wall and the re-enforcing panel wall connecting between the chuck wall and the central panel of the shell.
  • the invention provides a shell having an improved partial curl at its periphery in which the inward edge of the curl is pre-formed such that during the seaming-operations, when the end formed from the shell is attached to a can, the curl will roll smoothly into the curled seam, minimizing the possibility of wrinkled seams and/or punctures or cuts.of the can neck in the region of the seam.
  • the earring is minimized, and the inner curl diameter spacing from the chuck wall of the shell is made more uniform and concentric, by forming the shell from a blank which is multi-sided in configuration rather than circular.
  • the shape of the blank is such that the diameter of the blank parallel to the grain of the strip from which it is formed is less than the diameter of the blank transverse to the grain direction.
  • the diameters with and transverse to the grain and at 45° to the grain direction are different and the transition of the side edges of the blank are rounded.
  • the invention also provides a finished shell, and a process of manufacturing such a shell, in which the shell is formed in two steps solely by reciprocable tooling in one or more presses, for example a standard single action press. No additional curling or the like is necessary to finish the desired pre-formed curl at the periphery of the shell.
  • the object of the invention is to provide a unique shell for making can ends which is characterized by minimized earring, more uniform concentricity of the inner and outer curl with the chuck wall, more uniform thickness especially through the connection between the chuck wall and the central panel, and an improved pre-formed curl around the periphery of the shell; to provide tooling for a reciprocating press, preferably of the single-acting type, which can manufacture such shells rapidly in larege quantities; to provide an improved method for making such shells including the use of a specially designed multi-sided blank to accommodate for the different response of the blank material to tthe tooling acting along or across the grain, and also including controlled formation of the juction area between the chuck wall and the central panel of the more uniform thickness of the shell material is maintained.
  • Tne making of a shell according to the invention is generally divided into two operations, each of which can be carried out within a conventional single-action ram press having a specially adapted tooling.
  • a typical press utilized is a Minster P2-45, although may other models are also suitable for use.
  • the relatively thin metal stock S (Fig. 3) from which the shell is ultimately formed is fed to one or more stations within the press.
  • the press ram operates at each of these first stations to separate a blank B from the stock, and to partially form the shell from the blank.
  • the partially completed shell formed at each of the first stations is then transferred to a corresponding second station within the same press, where the forming of the shells is completed, the press is opened, and the completed shells are discharged from the press.
  • a partially formed shell is finished by each second tooling station while a blank is produced and partially formed by each first station tooling. Moreover, the transfer of shells between stations is accomplished so that a shell partially formed in a first station by one press stroke is completed stroke is completed at the second station by the next succeeding stroke. It should be understood, however, that the first and second stations and corresponding tooling can readily be located in different presses, and the partially formed shells can be transferred immmediately from one press to the other (second), or the partially formed shells can be collected from the first press and later processed in second station tooling by the second press.
  • a portion of the strip of material from which the blanks are cut is shown at S in Fig. 3, and the shape of the blank is indicated within the area designated B which, as will be described, is a multi-sided form with rounded transitions from one side to the next, rather than an accurate circle of the same diameter throughout.
  • the seam between a typical end and the body of a can is seen to include the body book BH and the end or cover hook CH, and the region of overlap between these two is indicated by the dimension OL.
  • a quantity of sealing compound is located in the area between the top of the body hook and the undersurface of the end, however this compound is not illustrated in Fig. 1.
  • the effect of earring is either to cause a very small amount of overlap, or to cause excessive overlap in which case the end of the end or cover hook interferes with the bending of the seam parts at the top of the seam, or punctures the wall of the can body in this region.
  • a typical dimension along this diameter, for a typical size blank to form one standard size of an end is 2.987 inches.
  • the vertical diameter V--V of the blank is typically 2.980 inches.
  • the diameter III--III of the blank at 45° in each direction from the vertical diameter is 2.974 inches; the diameter IV--IV of the blank at 22.5° in each direction from the diameter V--V is 2.982 inches; and the diameter II--II at 22.5° in each directioh from horizontal is 2.984 inches.
  • a blank of this configuration when produced in accordance with the invention from 0.0114 aluminum, results in a shell which has an inner curl diameter ICD (Fig.
  • Fig. 2 there is shown in cross-section, substantially enlarged beyond the normal size of an actual shell, the configuration of a finished shell as provided by the invention.
  • the shell is, of course, an integral metal part, made from a suitable metal blank, shaped as previously described, and in its final configuration including a flat central panel 10, a countersunk reinforcing area 11 extending into a relatively straight upward and outward shaped chuck wall 12, and a lip or curl edge portion 13 which terminates at the inner curl diameter.
  • the press tooling for each of the first stations is shown in Figs. 4 - 7.
  • the upper tooling is connected for operation by the press ram, while the lower tooling is fixed to the press frame.
  • the lower tooling includes die cut edge 14, over which the metal stock S as it enters the tooling at a level generally indicated by line 16. Die cut edge 14, along with die form ring 18 are solidly supported on a suitable base member. Additionally, the lower tooling includes draw ring 24, positioned between die form ring 18 and die cut edge 14. A center pressure pad 25 is located concentrically within form ring 18. Draw ring 24 is supported by springs (not shown), mounted in .the base member, which, compress due to pressure exerted upon draw ring 24 when the tooling is closed. The center pressure pad 25 is also supported by a spring (not shown) which will compress in response to force exerted by the upper tooling.
  • draw ring 24 and center pressure pad 25 are retained in the lower tooling with draw ring 24 bottoming against die cut edge 14 and center pressure pad 25 against form ring 18.
  • the uppermost surface of draw ring 24 is then at a position some distance below the lowest point of shear on the die cut edge 14, while the uppermost surface of the center pressure pad 25 is some distance above draw ring 24 and below the lowest point of shear on die cut edge 14.
  • the upper tooling is provided with blank punch 30 positioned to cooperate with draw ring 24 for as the tooling is closed.
  • a knockout and positioner 32 is located above die form ring 18, and punch center 34 is provided with an appropriate configuration to produce the partially completed shell, as well as to clamp a blank in cooperation with center pressure pad 25.
  • Blank punch 30, knockout and positioner 32, and punch center 34 are all closed simultaneously upon the lower tooling as the press ram is lowered.
  • Figs. 4 - 7. The sequential operation of the first station tooling to produce the blank from the stock and partially form a shell is shown in Figs. 4 - 7.
  • Fig. 4 the tooling is shown already partially closed.
  • the stock S enters the tooling along a line indicated at 16, and as the press ram is lowered, a flat blank B is produced by shearing the stock material between die cut edge 14 and blank punch 30.
  • the distance by which blank punch 30 leads punch center 34 is less than the distance at which the uppermost surface of center pressure pad 25 is above the uppermost surface of draw ring 24 in lower tooling 12. This causes the entire central panel of blank B to be clamped between punch center 34 and center pressure pad 25 first, followed by pinching of the outermost part of blank B between blank punch 30 and draw ring 24 before any forming begins.
  • Use of the central clamping secures the blank B in a centered position within the tooling during subsequent forming of a shell from the blank. Holding the blank in a centered position contributes to controlled working of the blank and minimizing variation in the curled lip portion provided at the outer edge of the completed shell, providing a more even amount of material for later seaming.
  • the press ram continues to move downward as the punch center 34 begins to form the chuck wall 12 on blank B.
  • the blank material is no longer held between the blank punch 30: and the draw ring 24, but is still held between punch center 34 and pad 25, and the draw ring 24 no longer controls the formation of the shell.
  • the clearance between the inside diameter of the blank punch 30 and the outside diameter of the die form ring 18 is selected to provide an appropriate amount of drag or resistance on the blank B to insure proper formation.
  • the inside diameter of blank punch 30 slightly narrows above the curves shown at 49 (shown exaggerated for clarity).
  • the drag on the outermost portion of blank B is increased. This is to insure that this portion of the resulting shell 48 is drawn more tightly over die form ring 18 so that the curl found in shell 48 extends to the very edge of shell 48, without any straight or less than fully curled portions.
  • Fig. 7 the tooling is shown in its closed position with the press ram bottomed against appropriate stop blocks.
  • the first portion of the shell formation operation is completed, with the flat central panel 10 terminating at a relatively large radius area 52 to produce a soft stretch so as not to overwork the material in this area.
  • the large radius area 52 forms the junction region of chuck wall 12 with the central panel 10, and will later form the shell countersink and panel form radius.
  • a sufficiently large radius is provided that a much tighter radius can later be provided for the shell countersink while maintaining sufficient material thickness.
  • the reverse bends applied to the inner wall of die center form ring 18 and the outer wall of punch center.34 serve to produce a straight chuck wall 12 without either inward or outward bowing, enabling the shell to fit accurately within the second station tooling.
  • the shell is further provided with a lip 53 extending generally outwardly and upwardly from the chuck wall 51, but having general downward curvature.
  • Lip 53 is provided with two distinct curvatures, giving lip 53 a 'gull-wing" cross-sectional configuration. Its portion adjacent chuckwall 12 has only slight relative curvature and thus provides the upward extension of lip 53, while the outermost portion is provided with a relatively sharp downward curvature by dieform ring 18. However the outer edge of lip 53 is located to at least even with, if not above, the point where lip 53 connects with the shell chuck wall 12.
  • knockout and positioner 32 Upon closure of the tooling, knockout and positioner 32 does not contact the partly completed shell. Once the forming operation has been completed, the press ram is raised to open the tooling, and the shell pre-form is held within blank punch 30 by the tight fit of its lip 53 therein, and is carried upward by the upper tooling. Once the lowermost portion of the shell pre-form has cleared the stock level indicated in Fig. 3 at 16, knockout and positioner 32 halts its upward movement while blank punch 30 and punch center 34:continue to rise with the press ram. When upward movement of knockout and positioner 32 is stopped the shell pre-form will contact it, and this pushes the shell pre-form from within the still-moving blank punch _ 30.
  • the partly formed shell 48 is then held in position on knockout and positioner 32 through application of a vacuum, via appropriate passageways (not shown) through the upper tooling to the surface of punch center 34. This vacuum then causes the shell pre-form to adhere to the surface of knockout and positioner 32 until it is removed.
  • the tooling for the second station is shown in Figs. 8 - 11, including upper tooling 61 supported on the press ram and lower tooling 62 supported on the press bed.
  • the lower tooling 62 includes a curl die 64 and panel form punch 66, both fixed in turn to suitable base members.
  • An insert 71 is mounted within panel form punch 66.
  • a spring pressure pad 72 is concentrically mounted between curl die 64 and panel form punch 66, supported by a plurality of springs 74 (not shown) mounted within the base which supports the lower tooling.
  • a fitting 75, for connection of a source of vacumn, leads into vacumn passageways 76, 78 provided to supply vacuum to the upper surface of panel form punch 66.
  • the upper 61 tooling includes a curl form punch and positioner 84 having a projection 85 for defining the forming characteristics of the lower surface of form punch and positioner 84.
  • panel form die 86 is mounted generally for movement along with the form punch and positioner 84. Panel form die 86 is supported from the press ram through a plurality of springs 90 (not shownt, which are selected to provide a "dwell" in the downward movement of panel form die 86 as the press ram is lowered.
  • Vacuum passageways 92, 93 are provided through panel form die 86, form punch and positioner 84, and their mounting respectively, thus vacuum may be supplied to the lower face of panel form die 86.
  • the sequential operation of the tooling of each of the second stations for completion of a shell is shown in detail in Figs. 9 - 11.
  • the shell pre-form enters the open tooling of the second station and is properly positioned on the lower tooling.
  • the large radius area 52 and chuck wall 12 are supported by the spring pressure pad 72, with the entire central panel 10 supported some distance above insert 71.
  • the shell pre-form is located and held in place by the vacuum supplied to the upper surface of panel form punch 66.
  • lowering of the press ram causes panel form die 86 to contact chuck wall 12, clamping it between panel form die 86 and spring pressure pad 72.
  • the spring-pressure on form die 86 is selected to be more easily compressible than the springs supporting the pressure pad, so that once contact with chuck wall 12 is made, panel form die 86 is held in position by spring pressure pad 72 and begins to dwell despite further lowering of the press ram. Subsequently, form punch and positioner 84 contacts lip 53.
  • Insert 71 includes a raised center 91 which now is positioned against the shell pre-form panel 50. Downward movement of spring pressure pad 72 effectively causes upward movement of the panel 50 with respect to the remainder of shell pre-form, reducing the distance between the uppermost portion of the shell pre-form and the panel 50.
  • the shell material from the large panel radius area 52 begins to pull away from the spring pressure pad 72 and wrap around the edges of the panel form punch 66 and the panel form die 86 (Figs. 9 and 10).
  • the tooling is shown in its closed position in Fig. 11.
  • the completed shell 48 now includes a pressure resistant panel 50 surrounded by countersink 98 and a die curled lip 53 having a hook portion, i.e. an outer curl edge section of relatively lesser radius of curvature, suitable for seaming onto a can.
  • the reasons for formation of the "gull-wing" lip 53 at the first station 10 can now be readily appreciated.
  • lip 53 by forming the less sharply curved portion of lip 53 at the first station, so as to extend upwardly as well as outwardly from chuck wall 12, some travel distance is provided for lip 53 during die curling of the outermost portion. If lip 53 were to be formed at the first station to extend from chuck wall 12 at the final desired angle, satisfactory die curling of the outer edge cannot be accomplished.
  • the result of these operations is to produce a shell which is characterized by its more uniform thickness throughout its cross section, and by uniformity of the spacing between chuck wall 12 and the inner curl diamer, i.e. the edge of the curled lip 53.
  • FIG. 12 An alternative embodiment for the upper tooling 61 is shown in Fig. 12, wherein the completed shell is coined about the outer edge of panel 50 adjacent wall 98 for additional strength. While coining of shells is typically performed in a separate coining press, the embodiment of.Fig. 12 enables coining to be performed as part of the forming process, eliminating the need for separate equipment and a separate process.
  • the central portion of panel form die 86 is provided with an annular recess into which a coining ring 97 and a spacer 99 are placed.
  • Coining ring 97 is in turn secured by retainer 101 which is attached to panel form die 86. Spacer 99 is selected so that when the tooling is fully closed as shown in Fig. 12, the working surface 100 of coining ring 97 contacts the shell 10A and provides sufficient compression to properly coin the outer edge of panel 50 of shell 10A.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
EP84115831A 1984-01-16 1984-12-19 Deckel für Dose Expired EP0151298B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SG87691A SG87691G (en) 1984-01-16 1991-10-21 Shell for can

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US57124384A 1984-01-16 1984-01-16
US571243 1984-01-16

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP88108470.1 Division-Into 1988-05-27

Publications (3)

Publication Number Publication Date
EP0151298A2 true EP0151298A2 (de) 1985-08-14
EP0151298A3 EP0151298A3 (en) 1985-12-04
EP0151298B1 EP0151298B1 (de) 1989-05-03

Family

ID=24282900

Family Applications (2)

Application Number Title Priority Date Filing Date
EP88108470A Expired - Lifetime EP0292982B1 (de) 1984-01-16 1984-12-19 Deckel für Dose
EP84115831A Expired EP0151298B1 (de) 1984-01-16 1984-12-19 Deckel für Dose

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP88108470A Expired - Lifetime EP0292982B1 (de) 1984-01-16 1984-12-19 Deckel für Dose

Country Status (9)

Country Link
EP (2) EP0292982B1 (de)
JP (4) JPH0615091B2 (de)
AU (2) AU573675B2 (de)
CA (1) CA1250488A (de)
DE (2) DE3484750D1 (de)
HK (2) HK62991A (de)
NZ (1) NZ210588A (de)
SG (1) SG58391G (de)
ZA (1) ZA85146B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112222271A (zh) * 2020-09-24 2021-01-15 中国航发贵州黎阳航空动力有限公司 一种分流器外壳的热拉伸成形方法

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NZ210588A (en) * 1984-01-16 1988-01-08 Dayton Reliable Tool & Mfg Co Shell used in manufacture of can ends: non-circular blank having rounded corners is cut from sheet metal
US4571978A (en) * 1984-02-14 1986-02-25 Metal Box P.L.C. Method of and apparatus for forming a reinforced can end
FR2570969B1 (fr) * 1984-10-03 1989-01-20 Gallay Sa Procede d'obturation avec sertissage et retreint d'une extremite d'une virole par un fond serti et mandrin de sertissage adapte a sa mise en oeuvre.
US4715208A (en) * 1986-10-30 1987-12-29 Redicon Corporation Method and apparatus for forming end panels for containers
US4713958A (en) * 1986-10-30 1987-12-22 Redicon Corporation Method and apparatus for forming container end panels
JPH01213148A (ja) * 1988-02-18 1989-08-25 Toyo Seikan Kaisha Ltd 一体成形耐圧缶とその製造方法
JPH07112580B2 (ja) * 1989-01-23 1995-12-06 株式会社北海製作所 圧力容器のコニカル鏡板成形法
DE3916665A1 (de) * 1989-05-23 1990-11-29 Haar Maschbau Alfons Vorrichtung zum herstellen von deckeln oder aehnlichen gegenstaenden aus metallblech
JPH082472B2 (ja) * 1991-01-16 1996-01-17 東洋製罐株式会社 缶蓋のカール成形方法
JP2546221B2 (ja) * 1995-08-08 1996-10-23 井関農機株式会社 施肥装置付き歩行型苗植機
SE508716C2 (sv) * 1996-01-15 1998-11-02 Tetra Laval Holdings & Finance Botten för en förpackning med inre övertryck
GB9711290D0 (en) * 1997-06-03 1997-07-30 Metal Box Plc Easy open ends
US6079249A (en) * 1998-11-02 2000-06-27 Alfons Haar Inc. Methods and apparatus for forming a beaded can end
CN104607540B (zh) * 2014-12-29 2017-04-19 义乌市易开盖实业公司 罐盖多级复合气压反向成型模及成型方法

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US3537291A (en) * 1967-10-04 1970-11-03 Reynolds Metals Co Apparatus for and method of forming an end closure for a can
US3957005A (en) * 1974-06-03 1976-05-18 Aluminum Company Of America Method for making a metal can end
US4372720A (en) * 1980-09-04 1983-02-08 American Can Company Forming of end closures

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GB1574226A (en) * 1976-06-14 1980-09-03 Styner & Bienz Ag Method of producing a cover for a tin having a weakening scoring for tearing it open apparatus for carrying out this method and a cover produced in accordance with such method
US4217843A (en) * 1977-07-29 1980-08-19 National Can Corporation Method and apparatus for forming ends
US4448322A (en) * 1978-12-08 1984-05-15 National Can Corporation Metal container end
JPS5846369A (ja) * 1981-09-14 1983-03-17 Minolta Camera Co Ltd 電子複写機用定着ロ−ラ−のクリ−ニングロ−ラ−
EP0103074A3 (de) * 1982-09-09 1984-05-23 Ball Corporation Erlangung erhöhter Steifigkeit für Metalldeckel durch Umstülpen gekrümmter Abschnitte
NZ210588A (en) * 1984-01-16 1988-01-08 Dayton Reliable Tool & Mfg Co Shell used in manufacture of can ends: non-circular blank having rounded corners is cut from sheet metal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3537291A (en) * 1967-10-04 1970-11-03 Reynolds Metals Co Apparatus for and method of forming an end closure for a can
US3957005A (en) * 1974-06-03 1976-05-18 Aluminum Company Of America Method for making a metal can end
US4372720A (en) * 1980-09-04 1983-02-08 American Can Company Forming of end closures

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112222271A (zh) * 2020-09-24 2021-01-15 中国航发贵州黎阳航空动力有限公司 一种分流器外壳的热拉伸成形方法
CN112222271B (zh) * 2020-09-24 2023-03-24 中国航发贵州黎阳航空动力有限公司 一种分流器外壳的热拉伸成形方法

Also Published As

Publication number Publication date
JPH0773766B2 (ja) 1995-08-09
EP0292982B1 (de) 1991-06-26
NZ210588A (en) 1988-01-08
SG58391G (en) 1991-08-23
EP0292982A1 (de) 1988-11-30
JPH0647471A (ja) 1994-02-22
DE3478000D1 (en) 1989-06-08
CA1267854C (de) 1990-04-17
CA1250488A (en) 1989-02-28
AU3751085A (en) 1985-07-25
AU573675B2 (en) 1988-06-16
EP0151298A3 (en) 1985-12-04
ZA85146B (en) 1985-08-28
JPS60170544A (ja) 1985-09-04
JPH0615091B2 (ja) 1994-03-02
HK62991A (en) 1991-08-23
HK9392A (en) 1992-01-31
DE3484750D1 (de) 1991-08-01
AU1262288A (en) 1988-06-02
JPH0771709B2 (ja) 1995-08-02
EP0151298B1 (de) 1989-05-03
JPH0679376A (ja) 1994-03-22
AU590473B2 (en) 1989-11-02
JPH0671366A (ja) 1994-03-15

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