Plural Deep Drawing Patents (Class 72/349)
  • Patent number: 6006415
    Abstract: A method for impressing holographic images or holograms in the surface of metal objects such as aluminum cans. The surfaces of metal shims and print rolls bearing holograms are hardened as by coating them with thin amorphous diamond coatings or diamond like coatings so the holograms can be embossed into many thousands of metal objects with clarity and consistency.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: December 28, 1999
    Assignee: Aluminum Company of America
    Inventors: Mark W. Schaefer, Thomas L. Levendusky, Simon Sheu, Robert B. Larsen, Neville C. Whittle
  • Patent number: 5987951
    Abstract: New technology for fabricating a one-piece cup-shaped can body which is formed free of side wall ironing from can stock comprising flat-rolled sheet metal substrate precoated with protective organic coating and forming lubricant. A plurality of successive diameter-reduction operations are carried out on a planar blank and cup-shaped work product during which side wall height is increased and side wall substrate is decreased in thickness to provide controlled uniformity in side wall substrate thickness over about 85% to about 95% of side wall height for such can body. The fabricating tooling provides for a preselected clearance between a punch peripheral wall and a die cavity internal wall in each of such plurality of diameter-reduction operations to achieve a desired decrease in side wall thickness as the precoated substrate is moved into a die cavity by relative movement of its respective punch.
    Type: Grant
    Filed: May 30, 1997
    Date of Patent: November 23, 1999
    Assignee: Weirton Steel Corporation
    Inventor: William T. Saunders
  • Patent number: 5946964
    Abstract: A redraw die for a can body maker incorporates an undercut sidewall, a grooved face and a reduced radius at the intersection between the grooved face and the sidewall. The undercut side wall is positioned proximate to the grooved face so as to permit a cup positioned over the redraw die to flex into an ovoid shape without pinching or binding against the side of the redraw sleeve. These features help prevent the formation of wrinkles when the cup is drawn and ironed in the body maker.
    Type: Grant
    Filed: April 1, 1998
    Date of Patent: September 7, 1999
    Assignee: American National Can Company
    Inventors: Walter Snyder, Gregory Giffhorn
  • Patent number: 5941110
    Abstract: Method and apparatus for TWB forming with adaptive control of movable punch and/or die segments in a manner to maintain a holding force at the weld line by the punch and die segments during at least initial forming of the blank in a manner to control and limit movement of the weld line. A tailor welded metal blank having a weld line is positioned between a punch and a die with the weld line spanning a cavity defined between the punch and the die. One or more individual segments of the punch and of the die are moved in a manner to engage opposite side regions of the weld line to apply a holding force to the weld line. Relative movement of the punch and/or die segments is adaptively controlled during at least initial deformation of the blank by the punch in a manner to maintain the holding force applied to weld line at a selected holding force value to retain the weld line in a plane defined by the punch and die segments, thereby reducing weld line movement.
    Type: Grant
    Filed: May 12, 1997
    Date of Patent: August 24, 1999
    Assignee: Northern University
    Inventors: Jian Cao, Brad L. Kinsey
  • Patent number: 5881444
    Abstract: A method for impressing holographic images or holograms in the surface of metal objects such as aluminum cans. The surfaces of metal shims and print rolls bearing holograms are hardened as by coating them with thin amorphous diamond coatings or diamond like coatings so the holograms can be embossed into many thousands of metal cans with clarity and consistency.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: March 16, 1999
    Assignee: Aluminum Company of America
    Inventors: Mark W. Schaefer, Thomas L. Levendusky, Simon Sheu, Robert B. Larsen, Neville C. Whittle
  • Patent number: 5862582
    Abstract: A method for making hollow workpieces such as beverage containers with a circular die in which an aluminum alloy is strip cast whereby the alloy is solidified rapidly without substantial precipitation. Thereafter, the aluminum alloy is formed into a cup which is drawn and passed through one or more dies to iron the walls of the cup and thereby lengthen the side walls thereof using at least one circular die having a die angle of less than about 6.degree.. It has been found that the use of such small die angles prevents or minimizes galling and tearoffs.
    Type: Grant
    Filed: November 3, 1995
    Date of Patent: January 26, 1999
    Assignee: Kaiser Aluminum & Chemical Corporation
    Inventor: Tyzh-Chiang Sun
  • Patent number: 5823041
    Abstract: Method and apparatus for forming a non-cylindrical can body having a bottom wall and a side wall from an elongated flat strip of sheet metal having a known grain orientation. A non-circular blank is formed from the metal strip in a first forming press with the grain extending in a known direction. The blank is drawn by the press into a non-cylindrical can blank with the grain direction being known in the bottom wall of the can blank. The can blank is moved toward a second press and is oriented automatically as it passes through an orienting station so the direction of the grain is known when entering the second press. The can blank is redrawn to form a non-cylindrical can body with a known grain direction in the bottom wall of the can body by maintaining the orientation of the can blank as it is drawn and redrawn in the second press.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: October 20, 1998
    Assignee: Can Industry Products, Inc.
    Inventor: James A. McClung
  • Patent number: 5787752
    Abstract: This invention relates to a method to manufacture cell-cans by DI can method, by manufacturing a bottomed cylindrical cup-shaped intermediate product from a sheet material of which both surfaces are nickel plated and annealed in an atmosphere of inert gas making the metal nickel layer thickness and the hardness at predetermined values, then ironing the intermediate product at a predetermined ironing rate, securing a thickness of the metal nickel layer of more than 1.0 .mu.m and a Vickers hardness of more than HV 200 on the side wall of finished cell-cans. By this, conventional defect problems due to the cracks generated on the intermediate product can be solved completely and the problem of hair-lines formed on the surface of finished cell-can can be eliminated.
    Type: Grant
    Filed: March 14, 1996
    Date of Patent: August 4, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Akira Iwase, Katsuhiko Mori, Yoshio Gohda, Susumu Kitaoka, Tokiya Fujimoto, Tadahiro Tokumoto, Hisashi Komeno
  • Patent number: 5775160
    Abstract: An improved can body maker apparatus has a redraw system of reduced mass. An air actuator is incorporated into the redraw motion assembly to maintain a cam actuated arm in contact with a cam surface during the reform cycle. A improved mechanical linkage eliminates the conventional redraw carriage. The redraw sleeve is supported within a fluid bearing mounted in a stationary housing.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: July 7, 1998
    Assignee: Aluminum Company of America
    Inventors: Karl S. Fleischer, Behzad Bakhti-Suroosh
  • Patent number: 5771733
    Abstract: Compact rolling block comprising at least one rolling mill stand having a horizontal axis and at least one rolling mill stand having a vertical axis, two end rolling mill stands having the same axis and being separated by a central rolling mill stand having an axis substantially at 90.degree.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: June 30, 1998
    Assignee: Daniele & C. Officine Meccaniche S.P.A.
    Inventors: Ferruccio Tomat, Attilio Sacchi, Gianni Nonino, Giorgio Lavaroni
  • Patent number: 5742993
    Abstract: A method for making hollow workpieces such as beverage containers with a circular die in which an aluminum alloy is strip cast whereby the alloy is solidified rapidly without substantial precipitation. Thereafter, the aluminum alloy is formed into a cup which is drawn and passed through one or more dies to iron the walls of the cup and thereby lengthen the side walls thereof using at least one circular die having a die angle of less than about 6 degrees and a chamfer angle of less than 35 degrees. It has been found that the use of such die angles prevents or minimizes galling and tearoffs.
    Type: Grant
    Filed: August 15, 1996
    Date of Patent: April 28, 1998
    Assignee: Kaiser Aluminum & Chemical Corporation
    Inventor: Tyzh-Chiang Sun
  • Patent number: 5722282
    Abstract: A method for manufacturing a cup-shaped article includes making the thickness of a cylinder portion of a cup-shaped configuration uniform, between a step of drawing a flat plate material portion into a cup-shaped configuration and a step of ironing the cup-shaped configuration into a final cup-shaped article. Increasing the thickness may be performed by coining or axial compression. The thickness increasing step may be replaced by a step, provided prior to the drawing step, of providing a plate material portion having a greater thickness at a radially inner portion than at a radially outer portion.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: March 3, 1998
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kouichi Mine, Akio Hotta
  • Patent number: 5692409
    Abstract: A die for the toolpack of a wall-ironing apparatus for forming metal cans is laterally displaceable for accommodating misalignment of the wall-ironing punch from its central axis. Restoring force to return the die to its own central position is provided by pneumatically operated biassing elements. For increasing the restoring force available, those biassing elements which are on the upstream side of lateral die movement are rendered ineffective on the die by engagement with stops located at the central die position. Usually, as described, the die is one of a pair of dies coupled for lateral movement together.
    Type: Grant
    Filed: August 21, 1995
    Date of Patent: December 2, 1997
    Assignee: Carnaudmetalbox (Holdings) USA, Inc.
    Inventors: Christopher Francis Cheers, Brian Hill, Paul Porucznik
  • Patent number: 5678439
    Abstract: An annular device (10) particularly for use as a spacer between dies (200) in a drawing and wall ironing process, the device including an outer delivery channel (30) which is linked to an inner delivery channel (40) by angled slots (50), so that liquid passing from the outer to the inner channel merges in the inner channel to form a vortex of fluid. The device also includes a lip (42) on the wall of the inner channel adjacent to the bore of the device, which serves as directing means to force the merged vortex of liquid out of the spacer in a longitudinal manner for cooling, lubricating and washing adjacent members.
    Type: Grant
    Filed: November 29, 1995
    Date of Patent: October 21, 1997
    Assignee: Carnaudmetalbox plc
    Inventors: Paul Robert Dunwoody, Richard Mark Orlando Golding
  • Patent number: 5678444
    Abstract: A method of sequentially manufacturing a hollow knock pin avoids distortion due to the large forces of shearing. A rounded corner of a deep-drawn cup shape is supported closely both on the inside radius and on the outside radius by curved walls matched to the cup's surface. The bottom of the cup is punched out close to the rounded corner. Due to the close support, no distortion occurs during the shearing operation. The close support also permits the pin bore to be smoothed by plastic deformation of the metal, without elastic deformation of the lip adjacent to the rounded corner.
    Type: Grant
    Filed: January 23, 1996
    Date of Patent: October 21, 1997
    Inventor: Hachiro Nagamori
  • Patent number: 5650087
    Abstract: A metal mould for making a frozen confectionery product is made of a titanium-containing materials, the mould being produced by cold-working a sheet-formed blank, either by deep-drawing or by pressing two half shells which are subsequently welded together. By using titanium for the ice lolly moulds, it is possible to avoid the use of poisonous inhibitors, without any risk of corrosion on the moulds. There is a considerable risk of corrosion on the moulds as the moulds used in the production of frozen confectionery products are subjected to freezing baths with strong saline solutions. When using titanium material for making the metal moulds, it is further possible to perform stress-relieving annealing at a lower temperature than was formerly possible when the moulds were made of stainless steel.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: July 22, 1997
    Assignee: Gram A/S
    Inventor: Klaus Gram
  • Patent number: 5647242
    Abstract: New technology for fabricating a one-piece cup-shaped can body is formed free of side wall ironing from can stock comprising flat-rolled sheet metal substrate precoated with protective organic coating and forming lubricant. A plurality of successive diameter-reduction operations are carried out a planar blank and cup-shaped work product during which side wall height is increased and side wall substrate is decreased in thickness to provide controlled uniformity in side wall substrate thickness over about 85% to about 95% of side wall height for such can body. The fabricating tooling provides for a preselected clearance between a punch peripheral wall and a die cavity internal wall in each of such plurality of diameter-reduction operations to achieve a desired decrease in side wall thickness as the precoated substrate is moved into a die cavity by relative movement of its respective punch.
    Type: Grant
    Filed: July 1, 1994
    Date of Patent: July 15, 1997
    Assignee: Weirton Steel Corporation
    Inventor: William T. Saunders
  • Patent number: 5630337
    Abstract: A container body is produced from a blank, by first forming the blank from sheet stock in hexagonal shape, thereby eliminating scrap from the blanking process. A die ring is configured to laterally redistribute material from the point areas of the hexagon into intermediate areas during the draw-and-iron can forming process, usefully incorporating this material instead of trimming it.
    Type: Grant
    Filed: September 7, 1995
    Date of Patent: May 20, 1997
    Inventor: Elmer D. Werth
  • Patent number: 5626049
    Abstract: Draw processing flat-rolled sheet metal substrate preselectively precoated on each surface with organic coating and draw lubricant into one-piece can bodies ready for assembly into sanitary packs free of any requirement for washing, organic coating or repair of organic coating after fabrication and before such direct usage. Selective organic precoating includes embodying a blooming compound which is made available as draw lubricant responsive to heat and/or pressure of draw forming; also, surface application of a draw lubricant after curing of the organic coating. Combined lubricant on each surface is verified before start of fabricating. Draw-forming of tensile strength sheet metal is controlled over side wall height by clamping solely between planar clamping surfaces and by interruption of draw to establish a flange at the open end of cup-shaped work product.
    Type: Grant
    Filed: April 14, 1995
    Date of Patent: May 6, 1997
    Assignee: Weirton Steel Corporation
    Inventor: William T. Saunders
  • Patent number: 5626046
    Abstract: A ram that is utilized in high speed apparatus for forming elongated one piece metal can bodies from shallow cups is constructed by metallurgically bonding either a nose piece to a body or a tail piece to a body, the body constructed from a single integral piece having an elongated thin walled tube section with either a tail piece section or a nose piece section for connection to a drive means.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: May 6, 1997
    Assignee: Sequa Corporation
    Inventor: Ralph Main
  • Patent number: 5617755
    Abstract: A press having a frame, a tool support 41 mounted on the frame, a ram 8 movable toward and away from the tool support, and a blank holder 20 surrounding the ram for movement towards and away from the tool support by a crosshead 21 has a crosshead plate 45 guided during motion towards and away from the tool support by pillars 42, 43 operably engaged with the tool support. The blank holder is adjustable to align with the tool support 20 and ram 8.
    Type: Grant
    Filed: August 11, 1995
    Date of Patent: April 8, 1997
    Assignee: Carnaudmetalbox (Holdings) USA, Inc.
    Inventors: Christopher F. Cheers, Brian Hill, Paul Porucznik, Ian Flude
  • Patent number: 5605069
    Abstract: A metal drawn and ironed container body having a sidewall, an annular neck integrally formed with the sidewall and extending upwardly and inwardly from an upper end of the sidewall, and a bottom integrally formed with and diposed adjacent a lower end of the sidewall. The bottom includes an annular convex support, an annular transition wall interconnecting the lower end of the sidewall to the convex support, and a generally concave center panel extending upwardly and inwardly relative to the convex support. The transition wall includes a first convex annular portion extending generally downwardly and inwardly from the lower end of the sidewall, a first concave annular portion extending generally downwardly and inwardly from the first convex annular portion, a second convex annular portion extending downwardly and inwardly from the first concave annular portion, and a second concave annular portion extending downwardly and inwardly from the second convex annular portion.
    Type: Grant
    Filed: April 12, 1995
    Date of Patent: February 25, 1997
    Assignee: Ball Corporation
    Inventor: K. Reed Jentzsch
  • Patent number: 5590558
    Abstract: Draw processing flat-rolled sheet metal substrate preselectively precoated on each surface with organic coating and draw lubricant into one-piece can bodies ready for assembly into sanitary can packs free of any requirement for applying organic coating or adding organic coating for repair purposes after fabrication and before such direct usage. Cupping of precoated flat-rolled sheet metal can stock using preselected tooling configurations and clearance avoids any increase in side wall metal thickness gage. Tension elongation during redraw is controlled over side wall height by clamping solely between planar clamping surfaces, tooling configurations and preselected clearances to decrease thickness gage uniformly over side wall height between flange metal open end of can body and curved transition zone at closed end. Surface area of the cavity entrance zone for each die is fabricated about multiple radii forming sharp edge about which coated can stock is drawn into each die cavity.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: January 7, 1997
    Assignee: Weirton Steel Corporation
    Inventors: William T. Saunders, deceased, William H. Dalrymple
  • Patent number: 5564300
    Abstract: An improved can body maker apparatus has a ram system that incorporates a ram guidance mechanical linkage that supports the linear motion of the ram and translates non linear circular motion of the crank into the linear motion of the ram.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: October 15, 1996
    Assignee: Aluminum Company of America
    Inventor: P. Michael Mueller
  • Patent number: 5555761
    Abstract: A bodymaker tool pack including a plurality interleaved ironing and spacer rings through which a ram or punch forces a workpiece to redraw a metal can body. Hydrostatic pads are created between the punch and spacer rings to effectively guide the punch through the tool pack. Additionally, the ironing and spacer rings are themselves supported by hydrostatic pressure pads formed within the tool pack housing.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: September 17, 1996
    Inventor: Roderick A. Lavy
  • Patent number: 5544517
    Abstract: A predrawn can made of a metal sheet coated with an organic film is subjected to a process which reduces its diameter and thins its walls by a high thinning ratio. The thinning is achieved by a blank holder (1), a redrawing die (3) and an ironing die (4), the reduction ratio for the ironing die being defined by ##EQU1## wherein T.sub.2 equals the thickness of the can before ironing and T.sub.3 equals the thickness after ironing, wherein the reduction ratio for the ironing die is in the range of 10 to 50%. The wall at the top end portion of the can is maintained thicker than the rest of the can wall.
    Type: Grant
    Filed: September 7, 1994
    Date of Patent: August 13, 1996
    Assignee: Toyo Kohan Co., Ltd.
    Inventor: Keiichi Shimizu
  • Patent number: 5507166
    Abstract: Apparatus for stripping a cylindrical workpiece, such as a can body, from a cylindrical supporting device, such as a punch in a can body making machine, using a plurality of circumferentially spaced apart fingers which are mounted for radial and linear sliding movement between a non-stripping location and a stripping location.
    Type: Grant
    Filed: August 23, 1994
    Date of Patent: April 16, 1996
    Assignee: Coors Brewing Company
    Inventors: Charles A. Orlick, Roger A. Hahn
  • Patent number: 5460024
    Abstract: Method and device for drawing and ironing a metallic or metalloplastic can by utilizing a chamber arranged for flow of lubricant therethrough, including an input opening and an output opening, and which is placed upstream of at least one drawing die. The chamber includes an annular, long and narrow, cylindro-conical antechamber located upstream of the die, adjacent to the external surface of the can which is being drawn, the antechamber having a length lo between 3 and 50 mm, and a thickness jo between 25 and 200 .mu.m.
    Type: Grant
    Filed: June 10, 1994
    Date of Patent: October 24, 1995
    Assignee: American National Can Company
    Inventors: Rene Meneghin, Louis Trepied
  • Patent number: 5456097
    Abstract: A lubrication system for an body maker of the type which is used in a container fabrication facility to shape a metallic can body includes a filter, a first conduit for conveying coolant from the body maker to an inlet side of the filter, a second conduit for conveying coolant from an outlet side of the filter to the body maker, a pump in one of the conduits for pumping coolant in a circuit which includes the filter, the conduits and the body maker, and a coolant makeup system for adding coolant to the circuit. The coolant makeup system is constructed and arranged to continuously supply coolant to the circuit to make up for continuous losses of coolant at the body maker.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: October 10, 1995
    Assignee: Crown Cork & Seal Company, Inc.
    Inventors: Nashat Z. Zakhary, Armen Zakarian
  • Patent number: 5454254
    Abstract: An air bag actuator is incorporated into the redraw motion assembly of a can body maker apparatus to maintain a cam actuated arm in compression during the reform cycle. Additionally, a housing is provided to enclose an air bag actuator, preventing axial displacement of the air bag and inadvertent damage to it during operations. The air bag actuator also functions as a pivotal link in the redraw system and eliminates the need for a complex pneumatic systems that include surge tanks, air supply tanks, and housing.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: October 3, 1995
    Assignee: Aluminum Company of America
    Inventor: Peter M. Mueller
  • Patent number: 5454253
    Abstract: An improved can body maker apparatus has a redraw system of reduced mass. An air actuator is incorporated into the redraw motion assembly to maintain a cam actuated arm in contact with a cam surface during the reform cycle. A improved mechanical linkage eliminates the conventional redraw carriage. The redraw sleeve is supported within a fluid bearing mounted in a stationary housing.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: October 3, 1995
    Assignee: Aluminum Company of America
    Inventor: Peter M. Mueller
  • Patent number: 5454252
    Abstract: In a can body maker for the forming of a shallow metal cup blank into a relatively deep shaped cup body, a redraw sleeve for use in a redraw mechanism has a generally cylindrical body portion with a first end adapted to engage the redraw mechanism and an opposite, second end for contact with the shallow cup blank during the forming of the deep shaped cup body. The second end has a radially inwardly directed, circumferentially disposed, deformable face that facilitates uniform contact with the metal cup while compensating for minor misalignment of the cup and ram.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: October 3, 1995
    Assignee: Aluminum Company of America
    Inventor: Peter M. Mueller
  • Patent number: 5400635
    Abstract: A can forming apparatus interposes a plurality of feed guides projecting part way into a path of feed of a can blank. The feed guides hold a leading can blank and embrace it in cooperating outer peripheral recesses to move the can blank into alignment with a die. Radially extended portions, continuous from the recesses, press the can blank downward after the can blank is released from the recesses. A pair of leaf springs or a pair of rollers temporarily hold the can blank before it is pressed downward by the radially extended portions of feed guides. An elongated punch is advanced into the die bore effect deep drawing and ironing of the can blank in the die bore thereby forming a can body. The punch is driven in reciprocating linear motion, supported on fluid bearings. Pressurized gas is admitted through the punch into the can body at a time in the can-forming cycle appropriate to remove the can from the punch. The pressurized gas separates the can body from the punch.
    Type: Grant
    Filed: August 25, 1993
    Date of Patent: March 28, 1995
    Assignee: Mitsubishi Materials Corporation
    Inventors: Akira Kawaguchi, Toshihiko Kawashima
  • Patent number: 5347839
    Abstract: New tooling technology for deep drawing one-piece can bodies from flat-rolled sheet metal can stock (58) which is precoated on both surfaces with an organic coating and draw lubricant. A draw die curved-surface cavity (122) entrance is formed using a radius of curvature (132) with a practical maximum of about five times nominal sheet metal thickness gage; and, preferably is formed about multiple radii of curvature (R.sub.L, R.sub.S, R.sub.L) to increase surface area (140) without increasing projection on the clamping plane. Die cavity wall (156) is tapered about 1.degree. to provide increasing cross section with increasing penetration of draw punch (160). Redraw die (90) has a sleeve-like configuration in a cross-sectional plane which includes its central longitudinal axis (70); such configuration enables increase in production rate by enabling coaxial relative movement of such die into work product registry (98,99) which position cups for redraw.
    Type: Grant
    Filed: April 27, 1993
    Date of Patent: September 20, 1994
    Assignee: Weirton Steel Corporation
    Inventor: William T. Saunders
  • Patent number: 5343729
    Abstract: New technology for fabricating a one-piece cup-shaped can body having a protective organic coating as formed. Such can body is formed free of side wall ironing from can stock comprising flat-rolled sheet metal substrate precoated with protective organic coating and forming lubricant. A plurality of successive diameter-reduction operations are carried out on a planar blank and cup-shaped work product under tension during which side wall height is increased and side wall substrate is decreased in thickness to provide controlled uniformity in side wall substrate thickness over about 85% to about 95% of side wall height for such can body. The fabricating tooling provides for a preselected clearance between a punch peripheral wall and a die cavity internal wall in each of such plurality of diameter-reduction operations to achieve a desired decrease in side wall thickness as the precoated substrate is moved into a die cavity by relative movement of its respective punch.
    Type: Grant
    Filed: October 12, 1990
    Date of Patent: September 6, 1994
    Assignee: Weirton Steel Corporation
    Inventor: William T. Saunders
  • Patent number: 5333484
    Abstract: A cylindrical workpiece prepared by drawing a sheet-like blank of austenite stainless steel is ironed in the axial direction in one step or in successive first and second steps. When the ironing operation is effected in one step, the wall thickness reduction percent is selected within a range of 35-45%. When the workpiece is ironed in the two steps, the first step is effected with the wall thickness reduction percent not exceeding 35%, while the second step is effected with the wall thickness reduction percent selected within a range of 35-45%.
    Type: Grant
    Filed: September 2, 1992
    Date of Patent: August 2, 1994
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kohichi Mine, Norio Itoh
  • Patent number: 5329799
    Abstract: Method and apparatus for pressing a sheet blank into a tubular container, including a first process or device for drawing the blank into an intermediate workpiece having a tubular portion and a bottom portion closing one end of the tubular portion, and a second process or device for ironing the tubular portion in the axial direction. The second process includes a forward ironing step for placing the workpiece on a first ironing punch and forcing the workpiece and first punch together into a first die hole, to iron the tubular portion in an axial direction from the above one end toward the other end, and a backward ironing step for placing the workpiece on a columnar second ironing punch and forcing the workpiece and second punch together into a second die hole, with a columnar pushing punch held in pressing contact with the outer surface of the bottom portion of the workpiece, to iron the tubular portion in the direction opposite to that in the forward ironing step.
    Type: Grant
    Filed: May 25, 1993
    Date of Patent: July 19, 1994
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Norio Ito, Koichi Mine
  • Patent number: 5282306
    Abstract: The present invention relates to a process for preparing a printed can be draw-forming or draw-redraw-forming a preliminarily printed metal blank or laminate. By forming an original plate for printing by an image processing by a computer, a print image faithful to the original image can be manifested on the side wall portion of the can, and formation of an undesirable stripe pattern can be prevented. Furthermore, a print image excellent in the linearity can be displayed without an error on the draw-formed can in due consideration of the anisotropy owing to the plastic flow of the blank.
    Type: Grant
    Filed: April 13, 1990
    Date of Patent: February 1, 1994
    Assignee: Toyo Seikan Kaisha, Ltd.
    Inventors: Imazu Katsuhiro, Akihiko Machii, Masao Ishinabe, Tomomi Kobayashi
  • Patent number: 5271259
    Abstract: An apparatus is provided for extending and retracting a redraw sleeve of a container bodymaker and for electromagnetically holding the redraw sleeve in its extended position against a container blank. A linear motor is disposed between two bulkheads and is interconnected with the redraw sleeve through one or more actuating rods. An electromagnet assembly is disposed proximate to a redraw die and, when activated, holds the redraw sleeve against the container blank while a reciprocating ram forces the container blank through the redraw die. The linear motor and the electromagnet assembly are axially disposed relative to the redraw die and the bulkheads to provide adequate access to the nose of the ram, the redraw sleeve and other components.
    Type: Grant
    Filed: June 12, 1992
    Date of Patent: December 21, 1993
    Assignee: Ball Corporation
    Inventors: Edward C. Miller, Randall S. Worwag
  • Patent number: 5271258
    Abstract: A core cap is formed from a one-piece sheet metal blank in which an inner cylindrical sleeve is formed and a reverse-fold outer sleeve determining a bight therebetween, and a recess is gradually formed by stamping in the bight and the inner sleeve so as to provide a keyway with parallel side walls symmetrically parallel with the axis of the inner sleeve.
    Type: Grant
    Filed: March 23, 1992
    Date of Patent: December 21, 1993
    Assignee: SLM Canada Inc.
    Inventors: Real Bernier, Rosaire Michel
  • Patent number: 5257523
    Abstract: A can body maker apparatus including a stationary support frame; a housing having forming and ironing dies located therein mounted on the support frame; an elongated ram; a reciprocating ram drive; and a redraw assembly which includes a redraw sleeve for supporting a can body preform thereon; a redraw carriage for supporting and axially displacing the redraw sleeve relative the ram; a redraw electromagnetic coil fixedly positioned relative the stationary support frame; and a permanent magnet fixedly mounted with respect to the redraw carriage in displaceable relationship with the coil along the coil axis for coacting with the electromagnetic field produced by the coil for controllably reciprocatingly displacing the redraw carriage.
    Type: Grant
    Filed: July 13, 1992
    Date of Patent: November 2, 1993
    Assignee: Coors Brewing Company
    Inventors: Roger A. Hahn, Phillip W. Gold, Harold Cook, Jr.
  • Patent number: 5249447
    Abstract: Disclosed is a process for the preparation of a thickness-reduced deep-draw-formed can, which comprises the steps of (i) coating a crystalline thermoplastic resin on a metal plate, (ii) heating the coated metal plate at a temperature higher than the glass transition point (Tg) of the thermoplastic resin and draw-forming the coated metal plated, and (iii) heating the obtained preliminarily drawn cup at a temperature higher than the glass transition temperature (Tg) of the thermoplastic resin and redrawing the cup at a bend-pulling speed of at least 1 m/min. According to this process, damage of the coating layer can be drastically moderated, and a deep-draw-formed can having prominently improved corrosion resistance and heat resistance can be obtained.
    Type: Grant
    Filed: February 25, 1993
    Date of Patent: October 5, 1993
    Assignee: Toyo Seikan Kaisha Ltd.
    Inventors: Masanori Aizawa, Tetsuo Miyazawa, Katsuhiro Imazu, Seishichi Kobayashi, Hiroshi Ueno
  • Patent number: 5249448
    Abstract: Redraw carriage apparatus (28) for use with a crank and slide press (10) includes a redraw carriage (32) that is secured to frame members (14a and 14b) by spaced-apart guide rods (34), and by spaced-apart support frames (36 and 37) that are bolted to respective ones of the frame members (14a and 14b) by cap screws (30), that are homed against one of the frame members (14b) by homing cap screws (76), and that support first and second (60 and 62) ends of the guide rods (34). Removal and replacement of the redraw carriage apparatus (28) is achieved by removal of the cap screws (30 and 76) and by movement of the redraw carriage apparatus (28), without disturbing alignment of a tool pack subassembly (16), by movement that is transverse to a longitudinal axis (24).
    Type: Grant
    Filed: July 9, 1992
    Date of Patent: October 5, 1993
    Assignee: Ball Corporation
    Inventors: Russell J. Fedor, Marc D. Sullivan
  • Patent number: 5235842
    Abstract: Die alignment apparatus for aligning redraw and ironing dies in die slots of a tool pack of a crank and slide press includes an alignment die and a calibration fixture. The alignment die includes a die body and a pair of position transducers disposed in the die body along separate ones of transducer axes. The calibration fixture locates the alignment die by a pair of locator pins that engage an outer cylindrical surface of the alignment die; and the transducers are calibrated by contact with a calibration punch that is a part of the calibration fixture. In use, the alignment die and an alignment punch replace the production punch and the redraw and ironing dies.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: August 17, 1993
    Assignee: Ball Corporation
    Inventors: Gordon L. Freeman, Michael D. Miles
  • Patent number: 5209099
    Abstract: New tooling technology for deep drawing one-piece can bodies from flat-rolled sheet metal can stock (58) which is precoated on both surfaces with an organic coating and draw lubricant. A draw die curved-surface cavity (122) entrance is formed using a radius of curvature (132) with a practical maximum of about five times nominal sheet metal thickness gage; and, preferably is formed about multiple radii of curvature (R.sub.L, R.sub.S, R.sub.L) to increase surface area (140) without increasing projection on the clamping plane. Die cavity wall (156) is tapered about 1.degree. to provide increasing cross section with increasing penetration of draw punch (160). Redraw die (90) has a sleeve-like configuration in a cross sectional plane which includes its central longitudinal axis (70); such configuration enables increase in production rate by enabling coaxial relative movement of such die into work product registry (98, 99) which position cups for redraw.
    Type: Grant
    Filed: March 8, 1990
    Date of Patent: May 11, 1993
    Assignee: Weirton Steel Corporation
    Inventor: William T. Saunders
  • Patent number: 5179854
    Abstract: In a process for the production of a draw-ironed can, supposing that at the draw-ironing step, the blank thickness is A, the maximum thickness of the side wall of a cup-shaped body obtained by draw working of the first stage is B and the maximum thickness of the side wall of a cup-shaped body obtained by redraw working of the second stage is C, the increase of thickness B is controlled to up to 20% of thickness A and the increase of thickness C is controlled to up to 30% of thickness A, and supposing that the final thickness of the side wall of the draw-ironed can finally obtained by ironing working is D, the thickness reduction ratio of the side wall of the obtained draw-ironed can satisfies the following requirements:(B-D)/B.times.100.ltoreq.70%,and(C-D)/C.times.100.ltoreq.70%.According to this process, the surface roughness of the final can body is improved, barrel breaking is prevented at the ironing step, and a draw-ironed can having improved necking workability and flanging workability is obtained.
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: January 19, 1993
    Assignee: Toy Seikan Kaisha Ltd.
    Inventors: Kenzo Matsui, Katsuhiro Imazu
  • Patent number: 5174706
    Abstract: A safe opening container lid having a bead side plate portion and a removable plate portion. The bead side plate portion has a first loop portion formed at the outer side of a tear line defining a removable plate portion, the loop portion being bent upwardly from the portion where the tear line is formed, the return portion of the loop portion that returns toward the tear line being spaced apart from the tear line forming portion, and the return portion being further bent outwardly at a position inward of the tear line. The removable plate portion has a second loop portion formed at the inner side of the tear line, the second loop portion being bent downwardly from the portion where the tear line is formed, the return portion of the second loop portion that returns toward the tear line being spaced apart from the tear line forming portion, and the return portion being further bent inwardly at a position outward of the tear line.
    Type: Grant
    Filed: January 10, 1992
    Date of Patent: December 29, 1992
    Inventor: Keiji Taniuchi
  • Patent number: 5168742
    Abstract: A wall ironing ring (8, 11, 14) for use in cooperation with a punch (1) to reduce the thickness of a sidewall of a cup (17) drawn from a laminate of a polyester film and sheet aluminum or sheet aluminum alloy has a frusto conical entry surface (24) to the ring which converges at an angle between 1.degree. and 4.degree. to a central axis perpendicular to the plane of the ring and terminates at a land of short length, measured at said axis; and divergent exit surface extends from said land at an angle in the range from 5.degree. to 15.degree.. The ironing ring may be made from a material having a thermal conductivity greater than 50 W/m.degree.C. used in cooperation with a like ring of smaller land diameter held apart from the first ring by a spacer (7) in which coolant is applied to the cup.
    Type: Grant
    Filed: January 17, 1991
    Date of Patent: December 8, 1992
    Assignee: CMB Foodcan plc
    Inventors: Peter J. Heyes, Stephen J. Digby, Steven P. Williams, Kevin M. Ambrose, Pravin Mistry
  • Patent number: 5168740
    Abstract: Drawn bores similar to a sleeve and provided with an inner thread are used as a substitute for nuts. The starting materials are flat sheet-metal blanks. In the course of step-by-step deformation with shaping tools, the wall thickness of the drawn bores decreases, compared to the starting material. This is true in particular with increased height of the drawn bores and sheet-metal blanks with larger surfaces. Accordingly, the invention is intended to recite a method according to which it becomes possible to produce high drawn bores, having a wall thickness comparable to the thickness of the original material, from sheet-metal blanks with large surfaces for highly stressed screw connections. This object is attained by means of a changed sequence of the step-by-step operation. Flat pressing of the sheet-metal piece is only performed after partial inward crimping has been started.
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: December 8, 1992
    Inventor: Albert Griesemer
  • Patent number: 5160031
    Abstract: An open-top container that is generally circular in cross-section and is formed from deformable metal by utilizing a press to force bottom portions of an upwardly opening workpiece into a die to carry out drawing operations that alter bottom and side wall portions of the workpiece to elongate the workpiece and to provide the workpiece with tapered, fluted side portions that enable the resulting container to be nested with a like container for empty shipment and storage in a minimum of space. As a part of the container configuration process, each container is provided with a pluraltiy of vertically extending "flutes" that extend along the side walls of the container, and with at least one ring-like formation that serves to enhance container strength, container stability and/or container handling characteristics.
    Type: Grant
    Filed: August 16, 1991
    Date of Patent: November 3, 1992
    Assignee: Berwick Manufacturing Inc.
    Inventors: Stephen P. Palisin, Jr., Raymond J. Keller