Plural Deep Drawing Patents (Class 72/349)
  • Patent number: 4541265
    Abstract: A process for forming an improved deep drawn and ironed metal shell for use as a pressure vessel having selectively controlled wall thicknesses to impart additional strength to predetermined portions of the improved metal shell. A stepped mandrel is utilized in conjunction with at least one ironing die to fabricate the improved metal shell.
    Type: Grant
    Filed: July 17, 1984
    Date of Patent: September 17, 1985
    Assignee: Purolator Products Inc.
    Inventors: Richard G. Dye, Arthur W. Robichaud
  • Patent number: 4538441
    Abstract: In a redrawing-ironing apparatus provided with a punch fixed on a ram, a die means including a redrawing die and ironing dies, an annular piston for fastening the die means, a cup retained pad adapted to push the inner periphery of the bottom of a drawn cup placed on the redrawing die, and pins fixed on the annular piston and extending axially, the free end surface of the pin is engaged with the flange of the cup retainer pad at the end of the redrawing. As a result, the earing portions of the drawn cup can be prevented from being thinned and broken into fragments at the redrawing.
    Type: Grant
    Filed: June 12, 1984
    Date of Patent: September 3, 1985
    Assignee: Toyo Seikan Kaisha Limited
    Inventor: Horotaka Nishikawa
  • Patent number: 4535618
    Abstract: A system for forming unitary containers from flat metal stock includes a unique arrangement of both previously known and newly discovered apparatus, including means for blanking and cupping the flat metal stock into individual cups; means for drawing and redrawing the cups and bottom profiling them in one machine; and additional means for trimming, flanging, and beading the containers thus drawn. The system and method include, among other things, the utilization of apparatus which permits drawing, redrawing, and bottom profiling to take place in one press. This is accomplished by carrying draw, redraw, and bottom profile tooling in a single press and by inserting the cups in the press for the draw operation and them removing them and reinserting them for the redraw and bottom profile operations.
    Type: Grant
    Filed: July 23, 1984
    Date of Patent: August 20, 1985
    Assignee: Redicon Corporation
    Inventors: Joseph D. Bulso, Jr., Stephen D. Doyle, James A. McClung
  • Patent number: 4534202
    Abstract: A cup feeding mechanism for a bodymaker includes a guide chute defining a vertical path with a stop located at the lower end of the path defining a transfer area. The stop has a specifically configured area for receiving each cup and defining a fixed position for the cup in the transfer area. A drive member is reciprocated transversely of the path and picks up cups from the transfer area and positively drives them into alignment with a ram that extends perpendicular to the axis of the path so that the cups are maintained in accurate alignment with the ram prior to being transferred through the bodymaker.
    Type: Grant
    Filed: August 25, 1983
    Date of Patent: August 13, 1985
    Assignee: National Can Corporation
    Inventor: Walter W. Snyder
  • Patent number: 4530228
    Abstract: An apparatus and method for the high speed production of seamless metal container bodies is disclosed utilizing a reciprocating ram which forces a relatively shallow metal cup through a die assembly to iron the sidewall of said cup to form an elongated ironed container body, the ram is supported and critically aligned by at least two stationary points and also at its rearward end by a slideable ram block assembly to which the ram is rigidly secured, the critical alignment of the rear end of the ram prevents misalignment of the ram relative to the die assembly to avoid producing container bodies of overly inconsistent length.
    Type: Grant
    Filed: March 21, 1983
    Date of Patent: July 23, 1985
    Assignee: National Can Corporation
    Inventors: Walter W Snyder, Dennis G. Dettmer
  • Patent number: 4527413
    Abstract: A forming machine (10) is provided for forming a finished part (12) from a flat blank (14). Draw stations (18-24) are provided to initially form the intermediate part. Each draw station includes a punch (44, 62, 66, 70') and a draw die (48, 64, 68, 72). Each punch defines a shoulder along its length to create a first step (60) in the side walls (26) of the intermediate part. In a subsequent draw stage, a draw punch (70') forms a second shoulder along its length to create a second step (100) in the side walls (26) of the intermediate part. A draw shoulder (61) on the draw punch (71') mates with the step (60) to maintain the concentric shape thereof. In the subsequent necking and final form stages (30, 32, 34) the punch employed also has a shoulder to permit variation of the force applied to the intermediate part between the step and bottom portion.
    Type: Grant
    Filed: September 23, 1983
    Date of Patent: July 9, 1985
    Assignee: Verson Allsteel Press Company
    Inventors: John D. Budrean, John A. Kirkpatrick
  • Patent number: 4527412
    Abstract: A method and apparatus for making a necked container are disclosed wherein a sheet material is formed into a generally cylindrical tubular member and the adjacent longitudinally extending edges of the sheet are butt welded. The welded tubular member is progressively necked-in over a dome-shaped surface of a single mandrel provided within the welded tubular member. The free end of the necked end portion of the tubular member is trimmed and curled to form a necked container body.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: July 9, 1985
    Assignee: Stoffel Technologies, Inc.
    Inventors: Hans F. Stoffel, William T. Saunders, Anthony J. Sporri
  • Patent number: 4522049
    Abstract: An aluminum alloy food can body and a method of forming the same whereby an uncoated high strength aluminum alloy sheet stock is blanked and drawn into a sized cup and redrawn by one or more redraws to form the sized can body. The end wall of the can body is formed into a pressure resistant profile, the side wall adjacent the open end is trimmed and outwardly flanged, a plurality of annular beads is formed in a central portion of the side wall, and at least the interior of the can body is coated with a material compatible with the food product to be packaged in the can. An end portion of the can side wall is ironed to reduce its thickness during at least one of the redraw operations.
    Type: Grant
    Filed: March 14, 1983
    Date of Patent: June 11, 1985
    Assignee: Aluminum Company of America
    Inventor: Ernest J. Clowes
  • Patent number: 4509356
    Abstract: A forming machine (10) is provided for forming a finished part (12) from a flat blank (14). Draw stations (18-24) are provided to initially form the intermediate part. Each draw station includes a punch (44, 62, 66, 70) and a draw die (48, 64, 68, 72). Each punch defines a shoulder along its length to create a step (60) in the side walls (26) of the intermediate part. In the subsequent necking and final form stages (30, 32, 34) the punch employed also has a shoulder to permit variation of the force applied to the intermediate part between the step and bottom portion.
    Type: Grant
    Filed: August 13, 1982
    Date of Patent: April 9, 1985
    Assignee: Verson Allsteel Press Co.
    Inventors: John D. Budrean, John A. Kirkpatrick
  • Patent number: 4507339
    Abstract: A metal container comprising a seamless body and an end wall integral therewith and having on at least its interior surface a protective coating which is the reaction product of a citric acid ester utilized as a lubricant in forming the container and an after-applied synthetic resin.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: March 26, 1985
    Assignee: American Can Company
    Inventors: Adelaida L. Carbo, Raymond H. Good, Richard J. Karas
  • Patent number: 4506534
    Abstract: Apparatus for removing a drawn container from a draw horn which is carried by the inner slide of a double acting press includes a stripper assembly also carried by the inner slide and capable of controlled axial movement relatively of the draw horn. The draw horn and draw riser have coaxial, centrally disposed bores within which is received an elongate shaft of the stripper assembly. The distal end of the shaft carries a stripper pad while the proximal end is adjustably connected to a pivoting linkage mounted on the inner slide and normally pivoted under pressure by a pneumatically actuated piston so as to maintain the stripper assembly in retracted condition, the pad then forming the bottom of the horn.
    Type: Grant
    Filed: January 3, 1983
    Date of Patent: March 26, 1985
    Assignee: Redicon Corporation
    Inventors: Stephen D. Doyle, Joseph D. Bulso, Jr.
  • Patent number: 4503702
    Abstract: A method and apparatus for forming nestable two-piece containers includes forming a cup from a metal blank; redrawing the cup thus formed to approximately one-half its final height while imparting a tapered sidewall thereto by use of a tapered die center; redrawing the container thus formed to its full height while continuing the taper by use of a second tapered die center while simultaneously profiling the bottom of the container thus drawn. The apparatus includes at least two redraw stations, each including a tapered redraw die center and corresponding die. The second of said stations also includes bottom profiling tooling.
    Type: Grant
    Filed: May 5, 1983
    Date of Patent: March 12, 1985
    Assignee: Redicon Corporation
    Inventors: Joseph D. Bulso, Jr., Stephen D. Doyle
  • Patent number: 4502313
    Abstract: An apparatus for drawing and ironing a cup with a peripheral flange from relatively thin material into an elongated container also having a flange by moving a die and punch relative to one another and draw clamping and centering sleeve coaxial therewith and thereafter applying a bottom forming member axially relative to the die against the punch to profile shape said container bottom without the benefit of coolant flooding of said material during drawing and ironing, the improvement comprising; a die of a predetermined shape and size carried in the apparatus, a punch of a predetermined shape and size for cooperating with said die and each having surfaces which define a clearance therebetween during forming of said material; separate passages through said die means and said punch means to permit flow of coolant; valving in line with die and punch passages for independent control of the coolant flow from a supply means to said die and punch to permit regulation of the operating temperature of said die means wit
    Type: Grant
    Filed: May 12, 1982
    Date of Patent: March 5, 1985
    Assignee: American Can Company
    Inventors: Thomas L. Phalin, James J. Ulmes
  • Patent number: 4499750
    Abstract: In a drawing device for presses with a mechanically driven drawing ram (24) and with a sheet metal holder (5) exerting its holding force, acting on the metal sheet (27) and counteracting the drawing direction, by way of a pressure plate (7) by means of a die cushion piston (10), supporting the pressure plate and being under the effect of a pressure medium, in a fixed die cushion cylinder (12), the objective consists in avoiding, or at least reducing, the noise-generating impact shock upon impingement of the drawing ram (24) on the sheet metal holder (5) with the metal sheet (27) lying thereon.
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: February 19, 1985
    Assignee: L. Schuler GmbH
    Inventors: Heinz Gerber, Klaus Adam, Heinz Horn
  • Patent number: 4493201
    Abstract: A strong, seamless one-piece metal bottle of substantially uniform wall thickness for containing and dispensing gas under pressure is produced from a flat metal piece by a series of deep-drawing operations to provide an elongated cylindrical shell having an open end mouth and a slight flange thereabout. A dimple is formed in its bottom end wall. The flange and an adjacent cylindrical open end mouth portion of the shell is then severed from the main body, and the wall thickness of the new open end mouth portion is tapered from the cylindrical side wall of the shell towards its mouth edge. Thereafter, the tapered open mouth end portion is turned or swaged inwardly into a somewhat blunt, rounded-in nose portion of a substantially uniform thickness that substantially corresponds in the thickness to the side and bottom walls of the formed metal bottle and that has an open end of reduced size suitable for mounting a nipple, ferrule or valve fitting therein.
    Type: Grant
    Filed: January 21, 1983
    Date of Patent: January 15, 1985
    Assignee: Alco Industries, Inc.
    Inventor: Donald J. Schmidt
  • Patent number: 4485663
    Abstract: This disclosure relates to a product, the process for making same from precoated metal and the tool used for making the product. The product is a concurrently drawn and ironed sanitary food can wherein the side wall thickness of the container is relatively uniform and approximately 0.001" thinner than the thickness of the starting material. The process is a concurrent multiple drawing and ironing operation wherein the diameter and the wall thickness are reduced in each of a plurality of operations. Finally, the tools used for each drawing and ironing operation have particular configurations designed to permit this concurrent forming of both the diameter and the side wall thickness.
    Type: Grant
    Filed: December 13, 1983
    Date of Patent: December 4, 1984
    Assignee: American Can Company
    Inventors: Vance B. Gold, Thomas L. Phalin
  • Patent number: 4483172
    Abstract: A system for forming unitary containers from flat metal stock includes a unique arrangement of both previously known and newly discovered apparatus, including means for blanking and cupping the flat metal stock into individual cups; means for drawing and redrawing the cups and bottom profiling them in one machine; and additional means for trimming, flanging, and beading the containers thus drawn. The system and method include, among other things, the utilization of apparatus which permits drawing, redrawing, and bottom profiling to take place in one press. This is accomplished by carrying draw, redraw, and bottom profile tooling in a single press and by inserting the cups in the press for the draw operation and then removing them and reinserting them for the redraw and bottom profile operations.
    Type: Grant
    Filed: November 26, 1982
    Date of Patent: November 20, 1984
    Assignee: Redicon Corporation
    Inventors: Joseph D. Bulso, Jr., Stephen D. Doyle, James A. McClung
  • Patent number: 4457150
    Abstract: Drawn and ironed can bodies are formed from cold rolled steel sheet having a thin coating of a nickel-zinc alloy electroplated thereon by drawing the coated steel into a cup and ironing the sidewall of the cup on a mandrel by passing it through a toolpack comprising a plurality of ironing rings each including a generally conical lead-in surface having an angle relative to the axis of the mandrel within the range of 6.degree. to 81/2.degree. and a substantially cylindrical land extending no more than about 0.025 inches in the axial direction of the toolpack through the rings. The diameter of the land on successive ironing rings is progressively smaller in the direction of movement of the can through the toolpack, with the diameter of the final ironing ring being such as to reduce the sidewall of the cup to about one half its original thickness. The length of the land of the final ironing ring may be less than that of the previous ironing rings and preferably is within the range of 0.003 to 0.007 inches.
    Type: Grant
    Filed: February 11, 1982
    Date of Patent: July 3, 1984
    Assignee: National Steel Corporation
    Inventors: William T. Saunders, Lowell W. Austin, John R. Smith, William D. Bingle
  • Patent number: 4454743
    Abstract: An integrated system and apparatus for completely forming the body of a two-piece can in one press, including performing the operations of cupping, drawing, redrawing, bottom profiling, and trimming. The system includes the concept of performing all of the operations required to form the body of a two-piece can in one press and includes feeding the precoated stock material, either in the form of sheet or coil, through a lubricator and into a feeding apparatus which, in turn, selectively feeds sufficient quantities of the stock material into a press. The press carries the double die necessary to perform the typical blanking and cupping operation and passes the cups out of the press in two lanes onto cup conveyors which feed them back into the press whereupon the draw-redraw dies on both sides of the cup die perform the additional steps of first redraw, second redraw, bottom profile, and trimming. The formed containers are then conveyed to secondary processing stations such as beaders, testers, or palletizers.
    Type: Grant
    Filed: February 2, 1982
    Date of Patent: June 19, 1984
    Assignee: Redicon Corporation
    Inventors: Joseph D. Bulso, Jr., Stephen D. Doyle
  • Patent number: 4442692
    Abstract: A drawing and ironing assembly including a punch movable along a path having a plurality of spaced ironing die assemblies with the last of the ironing die assemblies having twin spaced lands, the diameter of the second twin land is slightly greater than the diameter of the first land to produce a very small amount of ironing.
    Type: Grant
    Filed: November 23, 1981
    Date of Patent: April 17, 1984
    Assignee: National Can Corporation
    Inventor: Seung W. Lyu
  • Patent number: 4441354
    Abstract: A process for forming hollow bodies of metal materials, particularly of aluminum alloys, based on a suitable combination of mechanical operations comprising deep drawing, stretching, tapering and tool machining, whereby it is possible to obtain essentially cylindrical one-piece metal bodies with a concave dished bottom and a dome-shaped head provided with a beaded opening. The unitary bodies are characterized in that the cylinder walls are very thin, highly strain-hardened and endowed with high mechanical properties, permitting a remarkable reduction in the metal material amount used in the aforesaid enbloc bodies, destined for being used chiefly as pressure containers, for example for aerosol.
    Type: Grant
    Filed: October 22, 1981
    Date of Patent: April 10, 1984
    Assignee: Tubettificio Ligure S.p.A.
    Inventor: Sergio Bodega
  • Patent number: 4425778
    Abstract: In manufacture of a can body by drawing a cup from a blank and subsequently redrawing the cup, one or more redrawing steps are performed by pulling the sidewall of the cup (2) by means of a punch (12) through an S-shaped path (30,24,31), whereby the wall is bent first in one direction and then in the other, to reduce its diameter, which is then reduced further in a convergent portion (20) of the die (10). The bending induces back tensions which stretch the metal and reduce its wall thickness.
    Type: Grant
    Filed: June 17, 1981
    Date of Patent: January 17, 1984
    Assignee: Metal Box Limited
    Inventors: Josef T. Franek, Paul Porucznik
  • Patent number: 4414836
    Abstract: An improved method and apparatus for deep drawing metal containers is disclosed in which flat sheet metal blanks are initially drawn into shallow cups having an open top, a substantially flat bottom wall, a substantially cylindrical sidewall and a curved transition section joining the bottom wall and sidewall. A redraw sleeve adapted to fit into and support the cups has a first annular clamping surface on its free end contoured and arranged to engage the transition section and the adjacent annular peripheral portion of the bottom wall of a cup. An annular redraw die is supported for movement from a retracted position spaced from the redraw sleeve to a clamping position cooperating with the redraw sleeve to clamp and hold the cups during redrawing. The redraw die has a second clamping surface contoured to engage the outer surface of the transition section and the adjacent annular peripheral portion of the bottom wall of a cup supported on the redraw sleeve.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: November 15, 1983
    Assignee: National Steel Corporation
    Inventor: William T. Saunders
  • Patent number: 4412440
    Abstract: This disclosure relates to a product, the process for making same from precoated metal and the tool used for making the product. The product is a concurrently drawn and ironed sanitary food can wherein the side wall thickness of the container is relatively uniform and approximately 0.001" thinner than the thickness of the starting material. The process is a concurrent multiple drawing and ironing operation wherein the diameter and the wall thickness are reduced in each of a plurality of operations. Finally, the tools used for each drawing and ironing operation have particular configurations designed to permit this concurrent forming of both the diameter and the side wall thickness.
    Type: Grant
    Filed: February 13, 1981
    Date of Patent: November 1, 1983
    Assignee: American Can Company
    Inventors: Thomas L. Phalin, James J. Ulmes
  • Patent number: 4407149
    Abstract: An improved sheet steel suitable for the production of containers and the like has a thin composite coating of nickel and zinc plated on both sides thereof. The steel substrate may be flat rolled blackplate and the composite nickel-zinc coating may be plated thereon by drawing a running length or strip of the steel through a nickel electroplating bath to which has been added the necessary concentration of zinc, and electrodepositing the two coating metals simultaneously and in the desired proportions. The coated steel sheet is particularly useful in forming drawn and ironed cans although it may be used for other purposes.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: October 4, 1983
    Assignee: National Steel Corporation
    Inventors: John R. Smith, William D. Bingle, Lowell W. Austin
  • Patent number: 4404837
    Abstract: An inverted press for producing multiple drawn metal containers combines in one press the functions of cupping and drawing presses. The press includes a blanking and cupping station and several drawing and redrawing stations, disposed one adjacent the other and rendered serially operative by a vertically reciprocable slide assembly. At each stage of operation the material, semifinished article or finished article is under complete control. A method for producing a drawn container by multiple forming and reforming of a drawn article, is also provided.
    Type: Grant
    Filed: November 1, 1982
    Date of Patent: September 20, 1983
    Assignee: American Can Company
    Inventors: Robert J. Allen, Edward W. Blake, Manjeshwar S. Rao, Kurt L. Hahn
  • Patent number: 4373370
    Abstract: An inverted press for producing multiple drawn metal containers combines in one press the functions of cupping and drawing presses. The press includes a blanking and cupping station and several drawing and redrawing stations, disposed one adjacent the other and rendered serially operative by a vertically reciprocable slide assembly. At each stage of operation the material, semifinished article or finished article is under complete control. A method for producing a drawn container by multiple forming and reforming of a drawn article, is also provided.
    Type: Grant
    Filed: July 11, 1979
    Date of Patent: February 15, 1983
    Assignee: American Can Company
    Inventors: Robert J. Allen, Edward W. Blake, Manjeshwar S. Rao, Kurt L. Hahn
  • Patent number: 4373368
    Abstract: A method and apparatus for forming a cylindrical wall-ironed sleeve having a bottom and a radially inwardly enlarged wall thickness at an end remote from said bottom with there being an internally tapered transition region between a normal wall thickness and the enlarged wall thickness, said method including the forming of the sleeve on a mandrel with said enlarged wall thickness being interlocked with said mandrel; the step of introducing a fluid under pressure through the mandrel between the mandrel and the sleeve at the transition region of the sleeve to momentarily radially enlarge the end of the sleeve remote from the bottom and release the inter-lock between the sleeve and the mandrel.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: February 15, 1983
    Assignee: Thomassen & Drijver-Verblifa NV
    Inventor: Hendrik G. Heijting
  • Patent number: 4372143
    Abstract: An apparatus for forming an inward dome in the bottom wall of a metal can body having a beveled peripheral edge bordering the bottom wall. The apparatus includes a housing which supports a convex die member adapted to engage the bottom wall of the can body to form the dome. A pressure ring is disposed radially outward of the die member and is mounted for sliding movement with respect to the die member. The pressure ring is provided with a beveled surface which is adapted to be engaged by the beveled edge of the can body to prevent deformation of the bevelled edge as the dome is formed in the bottom wall. The pressure ring is connected to an air spring which provides uniform resistance to movement of the ring relative to the die member. In addition, the housing and die member are connected through a second air spring to a fixed support and after the dome has been formed, continued axial movement of the can body will result in compression of the second air spring to insure full formation of the dome.
    Type: Grant
    Filed: October 10, 1980
    Date of Patent: February 8, 1983
    Assignee: Jos. Schlitz Brewing Company
    Inventors: Karl Elert, John C. Westphal
  • Patent number: 4364255
    Abstract: Apparatus and method for discharging flanged cups in a controlled oriented fashion from a blanking and forming press. The formed cup is raised to a position slightly higher than the upper face of the drawing die, and moved in a straight line by means of a high pressure air pulse to the inlet of a conduit-like discharge chute. The formed cups are moved through the discharge chute by air pressure issuing from angled slots in the walls of the chute. The invention is particularly advantageous for use with blanking and forming presses simultaneously producing a plurality of formed cups in order to discharge the formed cups separately from each station in an orientation substantially the same as that in which the cup was formed. The invention eliminates damage to the formed cup caused by random bulk handling in conventional discharge equipment.
    Type: Grant
    Filed: October 20, 1980
    Date of Patent: December 21, 1982
    Assignee: The Stolle Corporation
    Inventor: James I. Byrd
  • Patent number: 4346580
    Abstract: Improved ironing material and structure for drawing and ironing can bodies from lightweight flat rolled sheet metal while facilitating stripping from the ironing mandrel and providing desired flanging metal are disclosed. The exterior surface of the mandrel is provided with a uniform-taper transition zone contiguous to the trim height for a can body being formed such that sidewall metal thickness increases uniformly above the main body portion of the can body and expires along the tapered surface of the transition zone. The tapered surface extends beyond formed can body height so that stripping means approach the open end of an ironed can body along a portion of the mandrel having a smaller diameter than the interior diameter of the mandrel mounted can body.
    Type: Grant
    Filed: August 26, 1980
    Date of Patent: August 31, 1982
    Assignee: National Steel Corporation
    Inventor: William T. Saunders
  • Patent number: 4343174
    Abstract: A metal forming tool useful to form internal and external impressions of various configurations upon two piece can bodies of round, oval, triangular, rectangular or irregular and unsymmetrical cross-section.
    Type: Grant
    Filed: November 1, 1979
    Date of Patent: August 10, 1982
    Assignee: American Can Company
    Inventors: Kurt L. Hahn, Howard J. Padgett, Manjeshwar S. Rao
  • Patent number: 4339939
    Abstract: The method of drawing uniformly heavy walled parts in a multiple plunger machine without any intermediate anneals and a machine for carrying out the method. The method comprises a number of press operations which convert a flat blank to a final desired drawn configuration, the relatively uniform wall thickness being maintained throughout the operation by the mouth configuration of each die and by means of supplemental sleeves that assist the punches in extending the drawn shells into the dies with no stretch to the metal or thinning of walls. Work hardening due to stretch or tensile load is minimized allowing more deformation without anneals.
    Type: Grant
    Filed: June 15, 1981
    Date of Patent: July 20, 1982
    Assignee: Textron, Inc.
    Inventors: Walter R. Book, Anthony M. Putetti
  • Patent number: 4324124
    Abstract: A drawing and ironing assembly consists of a redraw assembly, at least one ironing assembly and a stripper assembly that cooperate with a punch to redraw a cup and then iron the sidewall thereof. The redraw assembly includes a support and a redraw ring which are also biased to a centered position and a floating air bearing is defined between the support and the frame surface to reduce friction while a nesting ring is located adjacent the redraw ring. Lubricating means are provided for creating a generally circumferential flow into the opening in the nesting ring. The stripper assembly includes a support which carries the stripper elements and the support is biased to a centered position with respect to a predetermined axis or path for the punch and fluid is supplied to relatively movable surfaces to assist in reducing friction.
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: April 13, 1982
    Assignee: National Can Corporation
    Inventor: Edward G. Maeder
  • Patent number: 4320848
    Abstract: An improved deep drawn and ironed metal shell for use as a pressure vessel having selectively controlled wall thicknesses to impart additional strength to predetermined portions of the improved metal shell. A stepped mandrel is utilized in conjunction with at least one ironing die to fabricate the improved metal shell.
    Type: Grant
    Filed: June 7, 1979
    Date of Patent: March 23, 1982
    Inventors: Richard G. Dye, Arthur W. Robichaud
  • Patent number: 4309888
    Abstract: A method and apparatus are disclosed for forming a drawn container pan having planar side walls and smooth curved corner walls the upper edges of which are formed with an outwardly directed peripheral stacker ledge and an upstanding rim, and wherein the pan is formed by drawing the peripheral edge of a blank between clamping surfaces under selected pressure differential at the portions of the blank forming the side and corner walls of the pan. A method and apparatus are also disclosed for trimming the drawn pan and forming stacking protuberances adjacent the corners of the pan.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: January 12, 1982
    Assignee: Kraftco Corporation
    Inventors: Roland E. Miller, Joseph A. Scaletta, John Valek
  • Patent number: 4305196
    Abstract: An inverted press for producing multiple drawn metal containers combines in one press the functions of cupping and drawing presses. The press includes a blanking and cupping station and several drawing and redrawing stations, disposed one adjacent the other and rendered serially operative by a vertically reciprocable slide assembly. At each stage of operation the material, semifinished article or finished article is under complete control. A method for producing a drawn container by multiple forming and reforming of a drawn article, is also provided.
    Type: Grant
    Filed: July 11, 1979
    Date of Patent: December 15, 1981
    Assignee: American Can Company
    Inventors: John R. Schmidlin, Edward F. Archambault, Robert P. Vandlik, Harold J. Jessogne
  • Patent number: 4300375
    Abstract: A tool pack assembly includes three modular units that are aligned with the path for a punch to redraw and iron a cup into a container shell. The first modular unit has a redraw ring assembly, a lubricating ring and an ironing ring serially supported in a support member while the second modular unit has a lubricating ring and an ironing ring in a support member. The third modular unit has a unique lubricant removal ring, a lubricating ring, an ironing ring and a stripper assembly arranged in series in a support member.
    Type: Grant
    Filed: April 4, 1980
    Date of Patent: November 17, 1981
    Assignee: National Can Corporation
    Inventors: Edward G. Maeder, Harry P. Proctor
  • Patent number: 4263800
    Abstract: A method of forming a nestable and stackable drawn and ironed container is disclosed. The container is designed to permit a plurality of the containers to be stacked within one another to thereby permit transport of empty containers while occupying far less space than previously required for beverage containers.
    Type: Grant
    Filed: March 26, 1979
    Date of Patent: April 28, 1981
    Assignee: Reynolds Metals Company
    Inventors: Horst F. Arfert, Edward D. Gardner, Charles H. Nicklies
  • Patent number: 4262510
    Abstract: An inverted press for producing multiple drawn metal containers combines in one press the functions of cupping and drawing presses. The press includes a blanking and cupping station and several drawing and redrawing stations, disposed one adjacent the other and rendered serially operative by a vertically reciprocable slide assembly. At each stage of operation the material, semifinished article or finished article is under complete control. A method for producing a drawn container by multiple forming and reforming of a drawn article, is also provided.
    Type: Grant
    Filed: July 11, 1979
    Date of Patent: April 21, 1981
    Assignee: American Can Company
    Inventors: Robert J. Allen, Kurt L. Hahn
  • Patent number: 4262512
    Abstract: A drawing and ironing assembly consists of a redraw assembly, at least one ironing assembly and a stripper assembly that cooperate with a punch to redraw a cup and then iron the sidewall thereof. The redraw assembly includes a support and a redraw ring which are also biased to a centered position and a floating air bearing is defined between the support and the frame surface to reduce friction while a nesting ring is located adjacent the redraw ring. Lubricating means are provided for creating a generally circumferential flow into the opening in the nesting ring. The stripper assembly includes a support which carries the stripper elements and the support is biased to a centered position with respect to a predetermined axis or path for the punch and fluid is supplied to relatively movable surfaces to assist in reducing friction.
    Type: Grant
    Filed: April 26, 1978
    Date of Patent: April 21, 1981
    Assignee: National Can Corporation
    Inventor: Edward G. Maeder
  • Patent number: 4261193
    Abstract: An apparatus and method for forming integral domed can bodies for aerosol cans. The apparatus is in the form of plural sets of tools, each set of tools including an inside tool and an outside tool so related as progressively to reduce the diameter of an end portion of the tubular body and in doing so gradually increasing the axial extent of an intermediate frustoconical portion. Each frustoconical intermediate portion is increased in extent axially by seating the previously formed portion on the inside tool and then shaping the blank on that same surface, whereby there is no interruption or stepping of the formed frustoconical intermediate portion of the blank.
    Type: Grant
    Filed: May 7, 1979
    Date of Patent: April 14, 1981
    Assignee: The Continental Group, Inc.
    Inventor: Arnold R. Boik
  • Patent number: 4249408
    Abstract: This invention provides a method for cold extruding 18% nickel maraging steel to form an article of manufacture, such as a sub projectile blank for the manufacture of cannon rounds which includes performing a series of cold extrusion operations on an extrusion blank with a tapered punch to produce a combination forward extrusion and backward extrusion. On the first cold extrusion operation a tapered hole is formed in the extrusion blank and the extrusion blank is elongated. Subsequent cold extrusion operations progressively elongate both the extrusion blank and the tapered hole. The punch and die geometry are such that the tapered hole is elongated by penetration of the punch into the blank and additionally backward extrusion of the material around the punch. Additionally, as the tapered hole becomes increasingly longer, a floating punch is employed wherein at least a portion of the punch is supported by the walls of the tapered hole.
    Type: Grant
    Filed: July 12, 1978
    Date of Patent: February 10, 1981
    Inventor: Robert Lovell
  • Patent number: 4248076
    Abstract: A method and apparatus for forming cup-shaped metal containers from a metal blank by drawing and then redrawing the blank to its finished configuration is disclosed. The method and apparatus is intended for use in a double acting press having inner and outer rams which operate in relatively timed relationship. The means for performing the drawing operation are operatively associated with the outer ram and the means for performing the redrawing operation are carried by the inner ram. The drawing means are pneumatically activated and the redrawing means on the inner ram are telescopically received within the drawing means of the outer ram and carry peripheral radially extending shoulders thereon for engagement with the drawing means so that, for at least a portion of the travel of the inner ram, travel of the drawing means is retarded thereby controlling the timing of the actuation of the drawing means and reducing the stroke of the press required to accomplish the triple action drawing and redrawing function.
    Type: Grant
    Filed: April 2, 1980
    Date of Patent: February 3, 1981
    Assignee: Redicon Corporation
    Inventors: Joseph D. Bulso, Jr., William R. Lewers
  • Patent number: 4224819
    Abstract: A reciprocal ram at commencement of a forward strokes engages a cup-shaped article carrying it through metal working dies and against a doming die at reversal into a rearward stroke immediately followed by stripping of the article from the ram. The ram has an internal chamber constantly fed pressurized air through a rearward restricted orifice, the chamber opening freely of the ram forward end portion and internally of the article when thereon. By preselecting orifice size, chamber and article volumes matched with air pressure, a predetermined volume of air at predetermined pressure is confined in the ram forwardly against the article immediately prior to stripping and preferably engagement of the article by an external stripper results in an internal stripping assist by the confined pressurized air, the increasing exposed volume of the article increasing the air confinement volume reducing the air pressure progressively to substantially atmospheric at completion of article stripping.
    Type: Grant
    Filed: November 17, 1978
    Date of Patent: September 30, 1980
    Assignee: Standun, Inc.
    Inventor: Rimvydas A. Kaminskas
  • Patent number: 4223544
    Abstract: A reciprocal ram carries a metallic cup on an end thereof axially through a die pack opening and a die ring thereof in a working metal forming stroke, the cup is stripped therefrom and the ram moves reversely through the die ring in a return stroke. An annular lubricant nozzle surrounding the die pack opening forwardly adjacent the die ring directs an annular flow of lubricant continuously axially along and against an angled die ring entrance surface to a die ring forming surface during presence of the cup therein, and over the die ring forming surface and through natural adherence along a die ring angled exit surface during lack of presence of the cup regardless of the ram position in its strokes.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: September 23, 1980
    Assignee: Standun, Inc.
    Inventor: Ralph M. Main
  • Patent number: 4217770
    Abstract: Plural dies for stepwise drawing a hollow blank on a mandrel are spaced so that a downstream die is placed at a location where the drawing strain from the previous die has been reduced to zero because the tensile stress in the deforming zone is balanced by adhesion to the mandrel.
    Type: Grant
    Filed: September 11, 1978
    Date of Patent: August 19, 1980
    Assignee: Mannesmann Aktiengesellschaft
    Inventor: Johannes Wassen
  • Patent number: 4214471
    Abstract: Apparatus for forming cup-shaped metal containers from a metal blank by drawing and then redrawing the blank to its finished configuration is disclosed. The apparatus is intended for use in a double acting press having inner and outer rams which operate in relatively timed relationship. The means for performing the drawing operation are operatively associated with the outer ram and the means for performing the redrawing operation are carried by the inner ram. The drawing means are pneumatically activated and the redrawing means on the inner ram are telescopically received within the drawing means of the outer ram and carry peripheral radially extending shoulders thereon for engagement with the drawing means so that, for at least a portion of the travel of the inner ram, travel of the drawing means is retarded thereby controlling the timing of the actuation of the drawing means and reducing the stroke of the press required to accomplish the triple action drawing and redrawing function.
    Type: Grant
    Filed: February 13, 1978
    Date of Patent: July 29, 1980
    Assignee: Redicon Corporation
    Inventors: Joseph D. Bulso, Jr., William R. Lewers
  • Patent number: 4193279
    Abstract: A cup holder sleeve and its support assembly for use in a drawing and ironing machine that has a circular bore and is supported for radial as well as tilting movement of the axis of the elongated bore with respect to the support. The support includes a pair of members that cooperate to define a recess surrounding a circular opening and an enlarged portion of the cup holder sleeve is received into the recess and cooperates with a cupper support element. The cup holder support element and cup holder sleeve are normally radially centered with respect to the opening by centering springs and the cup holder sleeve is normally maintained in engagement with the support element by hold-down springs. The cup holder sleeve and support element can be moved radially while the cup holder sleeve can be tilted with respect to the support element and all of the elements are normally maintained in a predetermined position by the centering springs and the hold-down springs.
    Type: Grant
    Filed: April 26, 1978
    Date of Patent: March 18, 1980
    Assignee: National Can Corporation
    Inventor: Edward G. Maeder
  • Patent number: 4184355
    Abstract: A method of producing heat exchanger fins, comprising the steps of perforating an aperture of a small diameter in a predetermined portion of a sheet material, while simultaneously forming a projecting cylinder of a diameter smaller than that of the flanged aperture to be ultimately formed, and machining the projecting cylinder into a flange of a predetermined dimension by simultaneous burring an ironing operations using a punch of a predetermined size.
    Type: Grant
    Filed: March 16, 1978
    Date of Patent: January 22, 1980
    Assignee: Hidaka Engineering Co., Ltd.
    Inventor: Toyoo Kozima