With Spaced Guide Pins (e.g., Die Set Leader Pins) Patents (Class 83/637)
  • Patent number: 10137489
    Abstract: A rotary stamper includes an upper die plate assembly, a lower die plate assembly, and a support frame having a drive assembly that moves the upper die plate horizontally and vertically along a generally circular pathway while moving the lower die plate along a linear horizontal pathway. The upper die plate is vertically slidably connected to the lower die plate by way of one or more vertical rods that extend from the lower die plate assembly up through the upper die plate. In operation, the lower die plate matches the horizontal movements of the upper die plate as the latter is moved along its circular pathway. Concurrently, the upper die plate moves towards and away from the lower die plate. This maintains a substantially constant alignment between the die plates for carrying out a periodic machining operation on a moving web of material passing there between.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: November 27, 2018
    Assignee: FORMTEK, INC.
    Inventors: Donald R. Hill, James Gafkowski
  • Patent number: 10058908
    Abstract: A processing device is provided which feeds a long plate body from an upstream side to a downstream side and sequentially carries out a press work including a blanking work to the long plate body. The processing device includes a plurality of stages provided along a feed direction of the long plate body, which has a die that applies the press work to the long plate body and a plurality of lifters provided along the feed direction of the long plate body which have lift-up parts that lift up the long plate body from the die. In the plurality of lifters, clearances by the lift-up parts of the lifters arranged in the downstream side are set to be larger than the clearances by the lift-up parts of the lifters arranged in the upstream side.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: August 28, 2018
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Masahiko Furuta, Kazufumi Yonemura
  • Publication number: 20090249935
    Abstract: A food slicer includes a lower container for holding sliced food items and one or more blades at the top. A pushing element is secured within a housing, with the housing being configured to slide vertically with respect to the container. A pair of pillars and a pair of guides form a path such that the pushing element follows a generally straight and vertical path as it moves downward toward the blades.
    Type: Application
    Filed: May 21, 2008
    Publication date: October 8, 2009
    Inventor: Sascha Kaposi
  • Patent number: 7343770
    Abstract: A system and process for stamping parts having tolerances below 1000 nanometers. The inventive system and process is particularly suited for producing optoelectronic parts. The system includes a stamping press and one or a progression of stamping stations for supporting a punch and die. The stamping stations are designed to maintain substantial alignment of the punch and die with minimal moving components. The stamping station includes a shaft for rigidly guiding the punch to the die. The stamping press is capable of providing the punch with the necessary force to perform the stamping operations. The system includes an interface system for interfacing the force of the press with the punch, while simultaneously structurally decoupling the press from the punch. The system also includes a locating sub-plate, for locating the stamping station in alignment relative to each other, and means for in-line machine stock material before entry into the stamping stations.
    Type: Grant
    Filed: July 15, 2003
    Date of Patent: March 18, 2008
    Assignee: Nanoprecision Products, Inc.
    Inventors: Michael K Barnoski, David Cohen, Dan Harris, Sangkyun Kang, Anthony Levi, Miguel Pinilla, Fritz Prinz, Alex Tarasyuk
  • Patent number: 7201101
    Abstract: A punch includes a jig having four punching regions, each punching region having a pattern hole and a concave embossment; guide columns extended upward from a border of the punching regions on the jig; a base for fixing the jig; a punching member punching and embossing the rectangular corner of a sheet member with vertically moving against the jig by guidance of the guide columns; and an elastic body to elastically bias the punching member upward.
    Type: Grant
    Filed: July 7, 2004
    Date of Patent: April 10, 2007
    Assignee: DN Craft Corporation
    Inventor: Wan-Young Oh
  • Patent number: 6761099
    Abstract: A Venetian blind cutting machine comprises a mold assembly, which has a main block and a guiding slot on the main block. A sliding block slidably receives in the guiding slot. The guiding slot has at least one stopping potion for stopping the sliding block. The sliding slot is for receiving slats therein between a closed end of the guiding slot and the sliding block. A cutter is slidably provided at the main block of the mold assembly for free shifting. Two driving bars have ends thereof fastening to the cutter. A joint block has two openings for receiving the driving bars therein and holding the driving bar therein by friction. The joint block is fastened to the sliding block. Whereby, the driving bar will drive the cutter, the joint block and the sliding block to move along with it. The sliding block will press the slats first to lock the slats in the guiding slot automatically.
    Type: Grant
    Filed: April 16, 2002
    Date of Patent: July 13, 2004
    Assignees: Industrial Technology Research Institute, Nien Made Enterprise Co., Ltd.
    Inventors: Jung-Kuei Lin, Lei-Yi Chen
  • Patent number: 6622603
    Abstract: A method and apparatus for punching holes in a substrate which is disposed between a punch head with a fixed partial pattern of holes and a die having a full array pattern of holes. The punch head punches holes in the substrate by aligning with the die and contacting the substrate. Punches contained in the punch head articulate in at least one of x, y, and theta positions in order to precisely align with holes in the die thereby producing holes in the substrate which precisely match holes in the die.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: September 23, 2003
    Assignee: International Business Machines Corporation
    Inventor: Ferdinand D. DiMaria
  • Publication number: 20030010175
    Abstract: A cutting device for shingles that cuts shingles at angles. Several blades, each on pressure plates, are forced into engagement with shingles by rollers that engage one side of the plates.
    Type: Application
    Filed: July 12, 2001
    Publication date: January 16, 2003
    Inventors: Randall D. Cohan, Jill Susann Cohan
  • Publication number: 20020124706
    Abstract: A guide device includes a ram and a column translatable axially relative to each other. The ram has an outer circumferential surface of a squared cross section formed of four flat portions each of which extends axially. The column disposed around the ram has a through hole of a squared cross section formed of four flat portions corresponding to the flat portions of the ram. In each flat portion of the column is provided a needle bearing that rolls on the corresponding flat portion of the ram. Inside the column are provided a plurality of supporting shafts extending in a direction perpendicular to the extending direction or to the axial direction of each flat portion of the ram. Each needle bearing is rotatably supported by the corresponding supporting shaft.
    Type: Application
    Filed: November 2, 2001
    Publication date: September 12, 2002
    Applicant: Isel Co., Ltd.
    Inventor: Masanori Mochizuki
  • Publication number: 20020029670
    Abstract: A gang punch tool assembly and method is provided for punching holes in a plurality of greensheets which are processed sequentially through the assembly. The punch mechanism is a gang punch cooperating with a corresponding die and the greensheet is automatically fed to the gang punch and die, the greensheet punched and then the punched greensheet removed from the punch area and another greensheet positioned for punching. Operation of the gang punch apparatus is efficient and effective and has a high greensheet throughput. A preferred gang punch uses a pressurizable air chamber for controlling punching of the greensheet without damage to the greensheets or gang punch mechanism.
    Type: Application
    Filed: July 16, 2001
    Publication date: March 14, 2002
    Applicant: International Business Machines Corporation
    Inventors: David C. Long, John U. Knickerbocker, Mark J. LaPlante, Thomas Weiss, Robert P. Westerfield
  • Patent number: 6041639
    Abstract: A method and apparatus is provided for forming and shearing a sheet metal workpiece in a single operation. The method includes the steps of: (a) providing a stationary lower die half; (b) stretching the workpiece over the lower die half to stretch-form the workpiece; (c) providing a vertically movable upper die half including a laterally movable floating portion with a shearing edge; (d) moving the upper die half toward the lower die half; (e) moving the floating portion laterally as the upper die half is moved toward the lower die half in order to properly align the floating portion with the lower die half; and (f) shearing the stretch-formed workpiece between the shearing edge and the lower die half as the upper die half moves toward the lower die half.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: March 28, 2000
    Assignee: The Boeing Company
    Inventors: Glen C. Pacher, Alan T. Potter, Kevin A. Gillespy
  • Patent number: 5823087
    Abstract: A punch press having connecting rods which face away from each other are arranged on the eccentric shaft, and each connecting rod is coupled to a connecting lever. Two toggle joint mechanism units are connected to one connecting lever. Two further toggle joint mechanism units are connected to the other connecting lever extending in the opposite direction. The first named toggle joint mechanism units are connected via pressure columns to a first ram. The second named toggle joint mechanism units are connected via further pressure columns to a second ram. Due to the driving structural members which are arranged symmetrically distributed relative to the eccentric shaft of the punch press and the two rams arrived that thereby, the punch press can feature an extremely long space for receipt of the tools without that the height of the punch press, the allowable rated loading and the moving masses must be held overally large.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: October 20, 1998
    Assignee: Bruderer AG
    Inventor: Oskar Eigenmann
  • Patent number: 5490317
    Abstract: The lower ends of alignment bearing shafts of an upper die member of a tape automated bonding apparatus are modified to include tapered alignment pins, each having a tapered surface that is complementary to the tapered interior end of the bore of a respective bushing on a lower die member. The alignment pin serves to guide its associated alignment shaft and a ball bearing sleeve carried thereby into the bushing. In addition, a first set of rails is installed directly beneath a die member actuator, and a second set of rails is installed on the upper die member. The second set of rails slide upon the first set of rails, so that the upper die member effectively mechanically floats on the first set of rails. The lower die member is affixed to a translatable platen, which is driven to an end stop position at the part excision station. Then, the upper die member is lowered onto the lower die member, so that the alignment pins contact the bores in the bushings on the lower die member.
    Type: Grant
    Filed: June 16, 1994
    Date of Patent: February 13, 1996
    Assignee: Microtek Industries, Inc.
    Inventor: Vincent T. Kubert
  • Patent number: 5245904
    Abstract: An electromagnetically-driven punch press having adjustable anti-skid supports for the ball bearings and ball cages of the ball-bearing bushings which carry the movable tool for preventing downward skidding of these balls and their cages when the moving tool punches down against the work material. Adjustable resilient cushioning arrests tool travel for minimizing "tool whip" and tool wear at the end of the work stroke.
    Type: Grant
    Filed: April 23, 1992
    Date of Patent: September 21, 1993
    Inventor: George M. Meyerle
  • Patent number: 4945954
    Abstract: A method and apparatus for aligning two mating tools is provided by a plurality of alignment members extending upward from the surface of one mating tool so that the alignment members engage in slidable contact with alignment tracks formed in the edges of the second mating tool. The alignment members and tracks can be formed in the four corners of rectangular mating tools, and the alignment members can be cylindrical rods with dome shaped tops. The alignment is useful both for tooling set-up as well as tooling usage. The alignment means can be used on a punch and lead form anvil for forming the outer leads of an integrated circuit bonded to a TAB tape.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: August 7, 1990
    Assignee: Microelectronics and Computer Technology Corporation
    Inventors: James D. Wehrly, Jr., Michael J. Bertram
  • Patent number: 4836071
    Abstract: To permit high-speed punching of complex shapes in extremely thin metal strips or ribbons, particularly for miniaturized semiconductor terminal elements, while using standardizing modular punch press components sush as a die, a stripper element and a punch carrier, with minimum longitudinal extent to suppress oscillations of the ribbon as it is being transported, at high punching frequencies, the stripper plate (2) is securely connected to a plurality of guide posts (6). Springs (18, 16) are provided which maintain the posts and the stripper plate in a base position, and lift the stripper plate above a die plate (1). These springs retain the posts, are circumferential spring rings (16) engaging a groove (17) in the posts and fitted in the die plate, or ball-and-detent arrangements (FIG.
    Type: Grant
    Filed: January 29, 1988
    Date of Patent: June 6, 1989
    Assignee: W. C. Heraeus GmbH
    Inventor: Metin Ersoy
  • Patent number: 4726273
    Abstract: A bench press for small die sets has a rack and pinion that can serve several purposes; as a manual-power drive, as an adjustable stop, when the bench press has a power drive, and as an index that adjustably fixes orientation of the top plate relative to the base. Choice of orientation permits work to be advanced to a die set carried by the bench press from any of four directions and similarly permits access to the handle of the pinion from left or right, front or back. The pinion and handle travel up and down with the upper plate of the bench press and the rack is stationary.
    Type: Grant
    Filed: November 20, 1986
    Date of Patent: February 23, 1988
    Inventor: John P. Miceli
  • Patent number: 4638704
    Abstract: A press device comprises a securing member for detachably securing a plate to a body, and a coupling member detachably provided at a part of a driving transmitting portion. The plate, ram, struts and bolster are detachable from the body together.
    Type: Grant
    Filed: September 1, 1983
    Date of Patent: January 27, 1987
    Assignees: Kabushiki Kaisha Daini Seikosha, Kabushiki Kaisha Kuboto Tekkojo
    Inventors: Hiroshi Wanibuchi, Akira Kubota
  • Patent number: 4604930
    Abstract: A light-weight press for punching, forming, etc., in which the guide pins are bored in order that pull rods may be passed therethrough from actuating cylinders to an adjustment mechanism that interrelates the upper ends of the guide pins with the platen of the press. The adjustment mechanism are connected to each other so as to operate simultaneously and ensure that the forces in the press do not become unbalanced. Downward movement of the platen is limited by striking of the upper ends of the guide pins by stop elements associated with the pull rods.
    Type: Grant
    Filed: April 30, 1984
    Date of Patent: August 12, 1986
    Inventors: Robert M. Avila, Glenn A. Hoffman, Jr.
  • Patent number: 4583438
    Abstract: Apparatus for piercing a workpiece includes a rotatable head carrying a punch, the head being designed to rotate out of vertical alignment with the die to provide unobstructed clearance above the die so that the workpiece can be easily lifted therefrom and a new workpiece positioned thereon for the next operation.
    Type: Grant
    Filed: October 19, 1983
    Date of Patent: April 22, 1986
    Inventor: Kenneth W. Kane
  • Patent number: 4494432
    Abstract: A cutter comprising a movable block with an upper cutting edge and a stationary block having a lower cutting edge are movably connected together as a unit for simultaneous insertion and removal in a cutting mechanism to facilitate the interchangeability of different cutting edges. An eccentric cam driven by a drive motor is movable into and out of engagement with cam followers carried by the movable block for reciprocating the movable block relative to the stationary block and for permitting the removal of the two blocks as a unit from the cutter mechanism.
    Type: Grant
    Filed: February 17, 1983
    Date of Patent: January 22, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Mikio Kogane
  • Patent number: 4485708
    Abstract: A punching device for automatic punching machines for the punching of paper, cardboard and the like, comprising: impulsion means for a top shoe; such as an eccentric cam drive; a stationary bottom shoe supporting a counterpunch; a movable top shoe supporting punch knives; and a gripper bar arrangement for intermittent forwarding through the punching device of sheets to be punched wherein the impulsion means for the top shoe is located between the top shoe and a yoke which is connected with the bottom shoe through prestressed tie rods.
    Type: Grant
    Filed: November 18, 1981
    Date of Patent: December 4, 1984
    Inventors: Albert Halff, Manfred Vossen
  • Patent number: 4377957
    Abstract: The blanking tool has a pair of plates, one of which supports a punch and the other has a mating die cavity. The two plates are resiliently joined together to permit limited reciprocal movement. One of the two joined plates has provisions for mounting to a platen of a punch press.
    Type: Grant
    Filed: July 3, 1980
    Date of Patent: March 29, 1983
    Assignee: The Boeing Company
    Inventor: Warren H. Wheeler
  • Patent number: 4129054
    Abstract: Punching press having a top cutter which is vertically movable by an axially guided ram. The top cutter extends beyond the cross-sectional surface area of the ram and cooperates with a bottom cutter mounted on the machine table. The ram is constructed as an angle section, particularly as an equal-limbed L-section, at least on the place of mounting for the top cutter and at least over an axial length corresponding to the length of stroke of the top cutter. The axial guiding system for the ram comprising a pin-and-bush guide which is disposed on the cutting clearance and comprising at least two pins and associated guide bushes situated at a distance from each other on the ram and on the machine frame in an axially parallel configuration.
    Type: Grant
    Filed: January 6, 1977
    Date of Patent: December 12, 1978
    Assignee: Ludwig Boschert, Maschinen- und Apparatebau GmbH & Co. KG
    Inventor: Harald Fazis
  • Patent number: 4104941
    Abstract: An assembly adapted for use in substantially increasing the accuracy of a reusable type punching system features a floating locater or guide templet and associated stripper-punch tip guide element to accurately, positionally locate a punch relative to an associated die part.
    Type: Grant
    Filed: August 12, 1977
    Date of Patent: August 8, 1978
    Assignee: S. B. Whistler & Sons, Inc.
    Inventor: Clarence L. Krueger
  • Patent number: 4086837
    Abstract: A stamping and cutting die-set having exchangeable die plates consisting of an upper and a lower part connected by means of guides and serving to secure at least one cutting die locked by means of at least one clamping system.Two centering pins (3) with conical tips (3a) pointing to the interior of the die-set are located no less than two each in the upper and lower parts (11,1) so as to be displaceable inside boreholes (13a) extending normally to the plane of the plates, these pins each being loaded by strong springs (5), and the tips (3a) of these pins projecting towards the inside of the die-set when the die-plates (2,21) are removed. The die-plates are provided with correspondingly designed hollowconical recesses (4) which are entered by tips (3a) of centering pins (3), which are pre-loaded, after die plates (2,21) are locked by means of clamping system (6,7).
    Type: Grant
    Filed: September 30, 1976
    Date of Patent: May 2, 1978
    Inventor: Manfred Dyck
  • Patent number: 4056029
    Abstract: A novel die set and a power pack that is adapted to be mounted thereon define, in part, the improved punch press comprising the present invention. Hollow, magnetizable leader pins having spring actuated stripper buttons therein are used as the armature for the power pack which also includes coil means positioned concentrically about at least one end of the leader pins. The coil means may be made in several discrete sections which are electrically connected parallel to each other and where more than one coil means is utilized, the plurality of coil means are also connected in parallel to each other. The power pack comprising the present invention is readily attachable to the movable portions of the die set.
    Type: Grant
    Filed: April 29, 1976
    Date of Patent: November 1, 1977
    Inventors: Norman R. Doherty, Richard F. Doherty
  • Patent number: 4022090
    Abstract: The power stroke of the within punch press results from the electrical interaction of an armature, attached in depending relation from a superposed positioned die set, and a solenoid coil located in the supporting base of the press. In assembling each component of the sub-assemblies consisting of the supported die set and of the supporting base, a positional relation is achieved for each component which in the assembly of the die set onto the base contributes to a proper projected positioning of the armature within the encircling solenoid coil, to thereby achieve the required electrical reaction therebetween without losses or other inefficiencies.
    Type: Grant
    Filed: July 14, 1976
    Date of Patent: May 10, 1977
    Inventors: Norman R. Doherty, Richard F. Doherty
  • Patent number: 4017267
    Abstract: Each one of a series of die parts is secured to and located within a precise position on a common die shoe by means of two joint structures. In each joint structure, a sleeve of a fixed length and diameter is telescoped with a slip fit into a longer opening extending through the die part and into the die shoe to precisely locate the die part on the shoe with respect to the other die parts and with respect to the shoe. The inside diameter of the sleeve is larger in diameter than the diameter of a screw which extends through the sleeve and is threaded into a hole in the die shoe to secure the part on the shoe regardless of whether the axis of the screw coincides precisely with the axis of the sleeve. When mounting the die part on the die shoe, the part first is clamped on the die shoe in an initially accurate position with a bore defining the portion of the opening in the die part serving to locate the position of the hole to be drilled and tapped in the die shoe.
    Type: Grant
    Filed: March 22, 1976
    Date of Patent: April 12, 1977
    Assignees: Ronald Hawley, Melvin Enkkeli, Daniel M. Clark, William Bryden, Arthur Adams, Dennis Hillison, Mrs. Dennis Hillison, Irving Hillison, Mrs. Irving Hillison
    Inventor: Lee E. Hawley
  • Patent number: 4004448
    Abstract: A locking mechanism is provided for locking the upper and lower portions of a stamping die together when the die is out of press and releasing the upper and lower portions of the stamping die from locking engagement with each other when the stamping die is in press. The mechanism includes an elongated lockbar operatively associated with a spring-biased safety pin and a fixed pivot pin in the upper portion of the stamping die. A vertical leader pin projects upward from the lower portion of the stamping die into a bushing mounted in the upper portion of the stamping die and includes an undercut portion forming a locking surface for cooperative locking and releasing engagement with the lockbar in response to movement of the safety pin which senses whether the stamping die is in press.
    Type: Grant
    Filed: August 14, 1975
    Date of Patent: January 25, 1977
    Inventor: John W. von Holdt
  • Patent number: 4003283
    Abstract: Disclosed herein is a die set in which the punch holder is guided for reciprocating movement towards and away from the die shoe by two-part leader pins, with the upper leader pin portions fixed to the punch holder and the lower leader pin portions fixed to the die shoe. Tapered surfaces on the upper leader pin portions are received in ball bearing cages located within sleeves on the lower leader pin portions to guide the movement of the punch holder. The tapered leader pin portions press the bearing balls into the sleeve to provide a tight shearing fit with no tolerance which minimizes deflection of the punch holder to provide more accurate punching.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: January 18, 1977
    Inventor: Kasimir Janiszewski
  • Patent number: 3973427
    Abstract: Mold changing apparatus is disclosed for a press having a slide for the upper mold, a movable bolster for the lower mold and transfer bars for successively transferring work pieces. In exchanging the molds, the upper mold is mounting on mounting members which are raised so as to move the upper mold above the transfer bars, thereby permitting the molds to be moved out of the press by the movement of the bolster without causing interference between the upper mold and the transfer bars held in position in the press.
    Type: Grant
    Filed: June 11, 1975
    Date of Patent: August 10, 1976
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventor: Syoziro Shirao
  • Patent number: 3971275
    Abstract: Novel nesting apparatus for aligning separable die set halves of the type having demountable die insert means and utilized in punch press machines which novel apparatus is operable upon cyclic engagement of the die set halves to effect nestable reception of projecting means on one die set half within mating means on the other die set half. The novel nesting apparatus assures accurate alignment of the respective punch and die means during the positioning, clamping, and punching of variously shaped workpieces introduced therein. No auxiliary alignment means is required.
    Type: Grant
    Filed: September 18, 1975
    Date of Patent: July 27, 1976
    Inventor: John J. Mach
  • Patent number: 3948129
    Abstract: A support plate is permanently fixed on the table of the press, which plate has mounted on the top thereof rollers, lateral guides and an abutment. Sets of tools are used, each of them comprising an upper tool and a lower tool. They are connected together by guiding columns and safety upright, so as to have always a constant total height. When being installed the sets of tools are located, or removed by moving the bed-plate of the lower tool on the rollers of the support plate. After placing and locating the tools, the bed-plate of the lower tool is clamped on the support plate and the bed-plate of the upper tool is clamped on the slide member of the press. After removal of the safety upright, the press is then ready to operate.
    Type: Grant
    Filed: September 11, 1974
    Date of Patent: April 6, 1976
    Assignee: Societe Anonyme des Usines Chausson
    Inventor: Alain Edouard Plegat
  • Patent number: 3939747
    Abstract: Profile press and precision cutting apparatus having a pressure multiplier comprising a cutting die loosely supported by a base plate, the cutting die being held in parallelism with the cutting tool by a guide means fixed to the piston rod, which means assures a torsion free guidance of said piston rod.
    Type: Grant
    Filed: April 18, 1974
    Date of Patent: February 24, 1976
    Assignee: Siegfried Harcuba
    Inventors: Siegfried Harcuba, Herbert Dits
  • Patent number: 3933071
    Abstract: A shearproof or notching or nibbling punch has an upper retainer member adapted to be secured to a press and a punch body. The upper body portion is adapted to be secured to the retainer member by bolt means and the lower body portion is square in cross section and has a substantially semi-cylindrical groove extending vertically along the center of each vertical face of the lower body portion. A heel for each groove has its lower portion flatted along its outer side to conform to the lower body configuration, and each heel has a cylindrical portion extending through a conforming aperture in the upper body portion and terminating in a head. Each head lies in an elongated slot in the upper body top surface, the slot being deeper than the height of the head. Springs lying in holes in the retainer member and extending into each slot bias the heels downward to project beyond the flat bottom surface of the lower body.
    Type: Grant
    Filed: March 27, 1975
    Date of Patent: January 20, 1976
    Assignee: Onondaga Tool Corporation
    Inventor: Edward J. Doring
  • Patent number: D255576
    Type: Grant
    Filed: December 7, 1977
    Date of Patent: June 24, 1980
    Assignee: OY. Fiskars AB.
    Inventor: Olof Dahlqvist
  • Patent number: D255577
    Type: Grant
    Filed: December 7, 1977
    Date of Patent: June 24, 1980
    Assignee: OY. Fiskars AB.
    Inventor: Olof Dahlqvist