Stripper Biased Against Product Patents (Class 83/138)
  • Patent number: 10603807
    Abstract: A punching device includes a bottom seat module and an action module. The bottom seat module includes a base plate having a first lower positioning structure, and a restraint member having a plate portion that has a bottom surface facing toward the base plate. The plate portion and the base plate are made of different materials. The action module is movable between a standby position and a punching position, and includes a punching head having a first upper positioning structure. When the action module is at the standby position, one of the first upper positioning structure and the first lower positioning structure slidably engages the other one of the first upper positioning structure and the first lower positioning structure.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: March 31, 2020
    Inventor: Chin-Wen Yen
  • Patent number: 9833829
    Abstract: A punch die includes: a punch body including a punch edge portion at a lower end portion along an axis, a key projecting from an outer periphery, and a punch driver at an upper portion along the axis; a punch guide including an inner hollow elongated along the axis and receiving the punch body to be movable along the axis, and a keyway formed on an internal periphery of the inner hollow to extend along the axis and mesh with the key; a retainer collar rotatably combined with the punch guide at an upper end along the axis and around the axis, the punch driver passing through the retainer collar to be movable along the axis; and a punch head screwed in an upper end portion along the axis of the punch driver to regulate a position of the punch driver.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: December 5, 2017
    Assignee: AMADA HOLDINGS CO., LTD.
    Inventors: Shigeru Endo, Hiroshi Nakai
  • Patent number: 9770751
    Abstract: A punch die includes: a punch body including a punch edge portion at a lower end portion along an axis, a key projecting from an outer periphery, and a punch driver at an upper portion along the axis; a punch guide including an inner hollow elongated along the axis and receiving the punch body to be movable along the axis, and a keyway formed on an internal periphery of the inner hollow to extend along the axis and mesh with the key; a retainer collar rotatably combined with the punch guide at an upper end along the axis and around the axis, the punch driver passing through the retainer collar to be movable along the axis; and a punch head screwed in an upper end portion along the axis of the punch driver to regulate a position of the punch driver.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: September 26, 2017
    Assignee: AMADA HOLDINGS CO., LTD.
    Inventors: Shigeru Endo, Hiroshi Nakai
  • Patent number: 8757037
    Abstract: A method of feeding packaging material (5, 11) between a punch form (1) and an anvil (12) and bringing the punch form (1) and the anvil (12) together so that the packaging material (5, 11) is die-cut in such a manner that a relative sliding (9) occurs between the packaging material (5, 11) and the actual sheet material (4) of the election rubber (3) during the die-cutting course, even when the clamping pressure (8) is applied.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: June 24, 2014
    Assignee: SOBI HB
    Inventor: Soren Cavlin
  • Publication number: 20140109742
    Abstract: A punch assembly for a hydraulic punch press machine that affords the ability to compensate for punch point metal loss due to resharpening by facilitating accurate repositioning of the punch point relative to an aperture in a stripper plate through which the punch point member projects during a stamping stroke of the punch assembly.
    Type: Application
    Filed: October 19, 2012
    Publication date: April 24, 2014
    Applicant: Mate Precision Tooling, Inc.
    Inventors: Mitchell I. Elsmore, Dennis K. Lowry, Ronald C. Windingstad
  • Publication number: 20130036888
    Abstract: In the case of a stripping device (3) for use with a cutting tool (1) with a cutting element, in particular a punch (2), for machining a workpiece, in particular a curved metal sheet (6), at least one fastening piece (4, 28, 40) for fastening it to the cutting tool, a spring-elastic element (21) arranged outside the workpiece contact region, a stripping element (15, 34) which comes into contact with the workpiece and surrounds the cutting element (2), and at least one guide element (11, 26, 33) guiding the stripping element (15, 34) being provided, a device for securing against rotation is provided to essentially prevent the stripping element (15) from rotating.
    Type: Application
    Filed: July 16, 2012
    Publication date: February 14, 2013
    Inventor: Harald Weigelt
  • Patent number: 8087333
    Abstract: A punch unit for a press die is provided for punching a hole in sheet metal. The punch unit includes a piercing punch provided with a sharp projection, a plunger for pressing the piercing punch, a cylinder for supporting the piercing punch and the plunger slidably in a punching direction, and a coil spring for retracting the piercing punch and the plunger. Also disclosed is a press die for punching a hole in sheet metal using the punch unit.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: January 3, 2012
    Assignees: Ones Co., Ltd., Oiles Corporation
    Inventor: Masatoshi Oishi
  • Patent number: 6311594
    Abstract: A punch guiding apparatus includes: a cylindrical punch guide to be vertically movably supported into a punch holder; a stripper plate is detachably mounted to a forward end portion of the cylindrical punch guide; and a ring-shaped fixture. In the construction, the fixture has a ring shape that both ends are brought into contact with or close to each other. Furthermore, the fixture has a non-circular shape in which it has a plurality of elastically deformed portions which are urged and come in contact with an inner peripheral surface of the punch guide so as to be enlarged.
    Type: Grant
    Filed: December 28, 1998
    Date of Patent: November 6, 2001
    Assignee: Amada Company, Limited
    Inventor: Yasuyuki Ootsuka
  • Patent number: 6152005
    Abstract: There is provided a method comprising a process of lightly fitting a distal end portion of a projecting portion 25 of a blank holder 23 into a fitting groove 19 formed in a punch guide 5 so as to be momentarily held therein; and a process of fitting the projecting portion 25 of the blank holder 23 into the fitting groove 19 while punching a punch guide hole 23G in the blank holder 23 when a punching portion 7 of a punch body 9 of a punch assembly 1 is lowered for pressing the blank holder 23 against a die D so that the punch guide 5 descends.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: November 28, 2000
    Assignee: Amada Metrecs Company, Limited
    Inventor: Yasuyuki Ootsuka
  • Patent number: 5964026
    Abstract: The invention relates to a sheet metal work center, in which a locking arrangement (15) is placed between the stationary part (9) of the buffer structure (2) and the releaser (13), wherein at least some of the vertical movements of the upper tool (7) and the releaser (13) can be implemented by using the transfer device (12), the stationary part (9) of the buffer structure (2) and the releaser (13) being connected with the locking arrangement (15).
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: October 12, 1999
    Assignee: Lillbacka Jetair Oy
    Inventors: Jorma Taijonlahti, Mikael Ollikainen
  • Patent number: 5662016
    Abstract: A punching die includes a punch body, a punch guide fitted on the punch body movably up and down with respect to the punch body, a punch head provided on a top portion of the punch body, and a gaseous spring provided between the punch body and the punch guide for pushing the punch guide downwardly with respect to the punch body. The gaseous spring is cylindrical and fitted on the punch body detachably, and includes a device for restricting a maximum length of the gaseous spring.
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: September 2, 1997
    Assignee: Amada Metrecs Company, Limited
    Inventor: Oriya Fujita
  • Patent number: 5553524
    Abstract: A stripper device for a punching tool comprises: a gas cylinder (5) filled with a gas (7) having a cylinder head (27) and a cylinder end (17) attached to a lower end of the cylinder head airtightly; and a piston (9) having a punch head (11) and a piston rod (15); an axial movement restricting member (13, 201) for restricting an axial movement of the piston in the gas cylinder filled with the gas; and a rotational movement restricting members (31; 205, 203) for restricting a rotational movement of the piston in the cylinder body. A stripping force of the stripper device can be obtained by a resilient force generated whenever the gas is compressed by the piston within the gas cylinder for each punching operation. The punch assembly enables plate material of various thicknesses to be punched out without generating stripping miss.
    Type: Grant
    Filed: September 27, 1994
    Date of Patent: September 10, 1996
    Assignee: Amada Metrecs Company, Limited
    Inventor: Oriya Fujita
  • Patent number: 5460067
    Abstract: A device for performing the continuous cutting of materials of any form and nature, provided they are stratified and not flexionally rigid. The device generally comprises: fixed and mobile support surfaces; a mobile cutting shear cooperating with a fixed cutting shear; a fixed blocking unit on the fixed support surface side of the cutting shears; a mobile blocking unit on the mobile support surface side of the cutting shears; an eccentric for driving mobile portions of the device, including the mobile cutting shear, the eccentric being synchronized with the fixed and mobile blocking units; and a link block and slide guide. Non-rigid, stratified materials thereby may be more easily cut in that the invention substantially reduces or eliminates the dragging effect of the material that typically occurs during the cutting process.
    Type: Grant
    Filed: June 22, 1992
    Date of Patent: October 24, 1995
    Inventors: Gianluigi Reis, Giorgio Massocco
  • Patent number: 5253559
    Abstract: A first tool assembly includes a punch holder assembly and a circuit board clamp and a second tool assembly includes a die for receiving punches held and driven by the punch holder assembly. A circuit board has holes formed by the punches and is clamped by the clamp to the die. The circuit board and die are aligned to the punch assembly by an alignment pin secured to the punch assembly operated independently of the operation of the punch assembly. The punch assembly and the clamp are independently controlled by actuators with a convex distortion of the punch assembly and clamp during punching to provide an improved clamping and punching action.
    Type: Grant
    Filed: June 19, 1991
    Date of Patent: October 19, 1993
    Assignee: U.S. Philips Corp.
    Inventors: Michel Philippe, Alain Sorel
  • Patent number: 5179882
    Abstract: A waste removing apparatus is used in a punching machine for manufacturing a carton and removes a waste region of a sheet inserted between a movable die and a fixed die by cutting the sheet along a punching line formed thereon. Two molded plates are provided on the movable die and the fixed die, respectively so as to sandwich a product region of the sheet therebetween. The molded plates have areas slightly smaller than the area of the product region to reliably separate the waste region of a sheet from the product region thereof, even though the sheet is thin and, as such, flexible.
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: January 19, 1993
    Assignees: Nippon Die Steel Co., Ltd., Asahi Machinery Ltd.
    Inventors: Takayuki Takeuchi, Isao Hirata
  • Patent number: 4947718
    Abstract: A punch and die system is disclosed as comprising punch and die templets serving to positionally locate punch and die assemblies relative thereto solely adjacent the region at which punching of a workpiece occurs in combination with guide assemblies for positionally locating the punch and die templets one to the other. The punch and die assemblies are designed to utilize interchangeable punch guide and die members and in a preferred construction a punch element is removably attached to its associated driver and shaped to permit opposite ends thereof to be employed in the punching operation. One or more punch elements may be loosely attached to their associated drivers.
    Type: Grant
    Filed: April 17, 1989
    Date of Patent: August 14, 1990
    Assignee: S. B. Whistler & Sons, Inc.
    Inventor: S. Arthur Whistler
  • Patent number: 4947719
    Abstract: A punch and die system is disclosed as comprising punch and die templets serving to positionally locate punch and die assemblies relative thereto solely adjacent the region at which punching of a workpiece occurs in combination with guide assemblies for positionally locating the punch and die templets one to the other. The punch and die assemblies are designed to utilize interchangeable punch guide and die members and in a preferred construction a punch element is removably attached to its associated driver and shaped to permit opposite ends thereof to be employed in the punching operation. One or more punch elements may be loosely attached to their associated drivers.
    Type: Grant
    Filed: April 17, 1989
    Date of Patent: August 14, 1990
    Assignee: S. B. Whistler & Sons, Inc.
    Inventor: S. Arthur Whistler
  • Patent number: 4947716
    Abstract: A punch and die system is disclosed as comprising punch and die templets serving to positionally locate punch and die assemblies relative thereto solely adjacent the region at which punching of a workpiece occurs in combination with guide assemblies for positionally locating the punch and die templets one to the other. The punch and die assemblies are designed to utilize interchangeable punch guide and die members and in a preferred construction a punch element is removably attached to its associated driver and shaped to permit opposite ends thereof to be employed in the punching operation. One or more punch elements may be loosely attached to their associated drivers.
    Type: Grant
    Filed: April 17, 1989
    Date of Patent: August 14, 1990
    Assignee: S. B. Whistler & Sons, Inc.
    Inventor: S. Arthur Whistler
  • Patent number: 4947717
    Abstract: A punch and die system is disclosed as comprising punch and die templets serving to positionally locate punch and die assemblies relative thereto solely adjacent the region at which punching of a workpiece occurs in combination with guide assemblies for positonally locating the punch and die templets one to the other. The punch and die assemblies are designed to utilize interchangeable punch guide and die members and in a preferred construction a punch element is removably attached to its associated driver and shaped to permit opposite ends thereof to be employed in the punching operation. One or more punch elements may be loosely attached to their associated drivers.
    Type: Grant
    Filed: April 17, 1989
    Date of Patent: August 14, 1990
    Assignee: S. B. Whistler & Sons, Inc.
    Inventor: S. Arthur Whistler
  • Patent number: 4856393
    Abstract: A die cutter for cutting a product from a sheet of material. The die cutter has a rule die blade, which defines the shape of the product. The die blade is held by a die holder, which has an opening corresponding to the die blade, so that the cut product can pass through the die holder. A platen is mounted for relative movement toward and away from the die holder, and has a groove corresponding to the die blade. The die blade thus does not contact the platen at any time. The platen also has passages for the removal of chaff. A resilient stripper plate is mounted on the die holder, adjacent to the die blade, for stripping the material away from the die blade.
    Type: Grant
    Filed: June 10, 1987
    Date of Patent: August 15, 1989
    Inventor: George B. Braddon
  • Patent number: 4843931
    Abstract: A punch and die system is disclosed as comprising punch and die templets serving to positionally locate punch and die assemblies relative thereto solely adjacent the region at which punching of a workpiece occurs in combination with guide assemblies for positionally locating the punch and die templets one to the other. The punch an dide assemblies are designed to utilize interchangeable punch guide and die members and in a preferred construction a punch element is removably attached to its associated driver and shaped to permit opposite ends thereof to be employed in the punching operation. One or more punch elements may be loosely attached to their associated drivers.
    Type: Grant
    Filed: September 1, 1987
    Date of Patent: July 4, 1989
    Assignee: S.B. Whistler & Sons, Inc.
    Inventor: S. Arthur Whister
  • Patent number: 4718161
    Abstract: A press tool having working parts constituted by stamps and dies and attachment parts such as blank-holders, punch-holders, die-holders, and stay blocks of the tool, wherein interchangeable stamps and dies, formed from metallic removable disc like elements are held by detachable die or stamp-holders, and cradles. The cradles are intended to receive and maintain in place the die or stamp-holder, and are provided with at least one recess presenting a form complementary to that of the holders for each of the die or stamp-holders, an adjustable clamp system is provided which cooperates with an associated cradle in order to render the holder radially and axially immovable.
    Type: Grant
    Filed: April 30, 1986
    Date of Patent: January 12, 1988
    Assignee: Essweing S.A.
    Inventors: Jean M. Pfister, Dorice Vrignaud
  • Patent number: 4316399
    Abstract: A punch retainer is formed with a bore in its upper portion for releasably securing a punch therein. The lower portion of the punch retainer is formed as a cylinder for a vertically movable stripper piston. The portion of the cylinder above the piston is connected to a source of gas under pressure so as to bias the piston downwardly. The punch extends downwardly in sealed relation through a central bore in the piston and terminates slightly above the lower end of the piston when the piston is in its lowermost position.
    Type: Grant
    Filed: April 4, 1980
    Date of Patent: February 23, 1982
    Inventor: Bernard J. Wallis
  • Patent number: 4063479
    Abstract: Process and apparatus for cutting continuous strand or roving, particular strands of mineral material such as glass, into short lengths is disclosed. The apparatus employs a rotatable drum equipped with a large number of radially disposed cutting blades, the drum cooperates with a supporting device for supporting the strand as it is cut. Ejector bars are maintained in position on the drum between adjacent cutting blades by elastic mounting members that receive the ends of the ejector bars. The elastic mounting members cause the ejector bars to compress the strand against the support drum as the strand is being cut and, in conjunction with centrifugal force arising from rotation of the drum, to eject the cut pieces of strand from the cutting drum.
    Type: Grant
    Filed: September 2, 1976
    Date of Patent: December 20, 1977
    Assignee: Saint-Gobain Industries
    Inventor: Giordano Roncato
  • Patent number: 4048889
    Abstract: A stripper for use in a sheet punching machine to clear the punch of the punched article is formed of a rectangular prism of resilient elastomeric material having a metal head plate for connection to the punch and a metal stripping plate to clear the punch of the punched article. The head plate and stripper plate have a plurality of projections which are enlarged at the end remote from the plates which engage in cooperating holes in the resilient material. The stripper plate, head plate and elastomeric material can be readily separated to allow convenient exchange and replacement of those parts.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: September 20, 1977
    Inventor: George C. Finley
  • Patent number: 3977281
    Abstract: A hole punching apparatus in which a punch having a center point formed thereon is locked to a punch support by in-line locking pins which can be unlocked to move the punch independently of its support toward the stock to be punched to align the center point of the punch and the location point on the stock, and in which cam means is provided for camming the locking means to release position when the punch is moved toward its original position relative to the punch support, means is provided for automatically restoring the locking pins to locked positions when the punch is restored to its original position and a telescoping connection is provided between the punch and the punch support for maintaining them in alignment when the punch is moved relative to the punch support to bring the center point of the punch into engagement with the stock.
    Type: Grant
    Filed: September 11, 1975
    Date of Patent: August 31, 1976
    Inventor: Herbert H. Lewthwaite
  • Patent number: 3945280
    Abstract: A method and apparatus for cutting threads, particularly threads formed of mineral substances such as glass, are disclosed. A rotating drum carrying a plurality of radially extending cutting blades operates in conjunction with a rotating support drum which carries and supports the thread for cutting by the cutting blades. Ejector elements carried by the cutting drum and positioned in the spaces between the cutting blades are urged radially outwardly by centrifugal force and compress the thread against the surface of the support drum. The ejector elements then serve to strip cut sections of the thread from between the blades as the cutting blades move away from the support drum. Compressed air is supplied to the spaces between the cutting blades to remove waste material resulting from the cutting operation.
    Type: Grant
    Filed: March 21, 1973
    Date of Patent: March 23, 1976
    Assignee: Saint-Gobain Industries
    Inventor: Giordano Roncato