Container (e.g., Cans) Patents (Class 219/64)
  • Patent number: 10301692
    Abstract: Object of the present invention is to provide a welding method prevented the fracture at the spot welding zone by recovering the strength of a spot welding zone, namely, the ductility and the toughness in the spot welding zone, and a weld structure manufactured by the method. In the welding method, a spot welding zone provided with a weld nugget 13a is formed by conducting spot welding on the heat treated steel sheets in a stack; the spot welding zone is tempering treated by the high-frequency electrical current application to make the weld nugget have a hardness of 150% or less of the hardness of the heat treated steel sheets, and the heat affected zone surrounding the weld nugget is made to have a hardness of 30% to 90% of the hardness at the weld nugget before the tempering treatment by the high-frequency electrical current application.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: May 28, 2019
    Assignee: NETUREN CO., LTD.
    Inventors: Akira Terajima, Kazuhiro Kawasaki, Fumiaki Ikuta, Yasuyuki Koyata, Yoshitaka Misaka
  • Patent number: 10183377
    Abstract: A method of standardizing a grinder burn etch test may include machining a test sample of substantially equivalent chemical composition and heat treatment to a manufactured part to be audited for grinder burn and receiving data on an expected range of thermal damage that may be caused on the manufactured part during grinding by grinder burn. The method may also include preparing the test sample by laser heat treating at least a portion of the test sample to create a range of thermal damage across predetermined areas on the test sample, wherein the range of thermal damage on the test sample encompasses the expected range of thermal damage that may be caused on the manufactured part during grinding by grinder burn. The method may still further include testing a grinder burn etch bath with the test sample to determine whether the etch bath can detect thermal damage across at least a threshold percentage of the expected range of thermal damage that may be caused on the manufactured part.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: January 22, 2019
    Assignee: Caterpillar Inc.
    Inventors: Jonathan Robert Crow, Trenton G. Jacobson
  • Patent number: 9381596
    Abstract: A welding fixture comprises a suction assembly, a drive assembly, and a positioning assembly. The suction assembly comprises a fixing member and a suction member slidably coupled to the fixing member. The drive assembly couples the fixing member to the suction member. The suction assembly comprises a positioning member slidably coupled to the fixing member, a flange protruding from the positioning member, and an elastic member sleeved on the positioning member. The elastic member is configured to bias the flange away from a side of the fixing member. The drive assembly can move the suction member and thereby moving the workpiece towards the positioning member, so that the weldment makes contact with the workpiece via the positioning member.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: July 5, 2016
    Assignees: FU DING ELECTRONICAL TECHNOLOGY (JIASHAN) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Jian-Qiang Lu, Jian-Hua Xu
  • Publication number: 20140366771
    Abstract: A cylindrical shell for a tank of a railway tank car is made using roll-forming technology and straight longitudinal weld seams. The cylindrical shell has a longitudinal axis and a uniform cross-sectional shape in a plane normal to the longitudinal axis. The cylindrical shell includes a plurality of elongated segments welded together along weld seams extending parallel to the longitudinal axis of the cylindrical shell. Each elongated segment forms a portion of the cross-sectional shape of the shell and is formed by passing a flat piece of metal plate stock material through a roll-forming machine configured to progressively bend the piece of stock material. In one embodiment, exactly three identical elongated segments, each defining an arc of 120 degrees, are welded together along adjacent longitudinal edges to form a cylindrical shell having a circular cross-section.
    Type: Application
    Filed: May 28, 2014
    Publication date: December 18, 2014
    Applicant: Samuel, Son & Co., Limited
    Inventor: Tamo P. Bianchi
  • Publication number: 20140353282
    Abstract: In a welding apparatus for the longitudinal seam welding of can bodies (31?) by way of electrode rollers (8, 17), three drive stages (4, 10, 20), by means of which the wire electrode (25) is driven in addition to the drive by the electrode rollers (8, 17), are provided in the wire course. Preferably, elastic stretching is brought about in this case by the three drive stages (4, 10, 20).
    Type: Application
    Filed: April 26, 2012
    Publication date: December 4, 2014
    Inventor: Peter Taiana
  • Patent number: 8847098
    Abstract: Devices and methods are contemplated in which a first electrode is circumferentially movable about a second electrode such that a tubular work piece can be resistance welded to a second work piece. Most preferably, the first electrode is a wheel-shaped electrode, while the second electrode is static and disk-shaped.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: September 30, 2014
    Assignee: Thermal Structures, Inc.
    Inventor: Vaughn V. Barnes
  • Publication number: 20140169914
    Abstract: In the field of manufacturing container bodies by means of resistance seam welding machines, at least a disturbance variable is collected, particularly errors in cutting the metal sheet. Because of this collection of disturbance variables, at least a control variable is automatically changed in order to compensate or to diminish the influence of the disturbance variable on the welding seam quality.
    Type: Application
    Filed: February 19, 2014
    Publication date: June 19, 2014
    Inventors: Willi Mueller, Daniel Dietrich
  • Patent number: 8668421
    Abstract: In the field of manufacturing container bodies by means of resistance seam welding machines, at least a disturbance variable is collected, particularly errors in cutting the metal sheet. Because of this collection of disturbance variables, at least a control variable is automatically changed in order to compensate or to diminish the influence of the disturbance variable on the welding seam quality.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: March 11, 2014
    Assignee: Soudronic AG
    Inventors: Willi Mueller, Daniel Dietrich
  • Patent number: 8304683
    Abstract: A seam welding apparatus and a seam welding method perform a seaming process on workpieces of various shapes having flange sections, by preventing a welding track formed by upper and lower rotary electrodes from becoming displaced from a welding reference line established on the flange section. The seam welding apparatus includes two rotary electrodes for gripping the flange section therebetween while seam-welding the flange section, a support for synchronizing movements of the two rotary electrodes with each other in a widthwise direction of the flange section, a turning mechanism for pressing at least one of the two rotary electrodes toward the workpiece body, a roller that abuts against an end face of the flange section, and roller adjusting means for positionally adjusting the roller.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: November 6, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Eisaku Hasegawa, Shogo Matsuda, Takafumi Ikeda
  • Patent number: 8097825
    Abstract: A laser-clad processing apparatus of the present invention is one which is for carrying out laser-clad processing onto a valve-seat portion of a cylinder head, and is characterized in that it comprises cylinder-head holding means (1) for holding a cylinder head (H) in an inclining manner so that the central axial line of a valve seat becomes the vertical direction, a laser-processing head (2) for irradiating a laser beam onto a process part of the valve seat and at the same time discharging a powdery material to this process part, rotary means (3) which rotates around the central axial line of the valve seat in such a state that the laser-processing head is inclined with respect to the vertical direction, and powdery-material supply means (4) for supplying the powdery material to the laser-processing head.
    Type: Grant
    Filed: June 29, 2004
    Date of Patent: January 17, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akio Sato, Yoshinori Ishikawa
  • Patent number: 7173209
    Abstract: Where can bodies of sheet metal are welded between the welding rollers of a welding machine, the welding current is not applied to the welding rollers until the body is between the welding electrode rollers. In this way, the quality of the weld at the initial weld point is improved, and where intermediate wire electrodes are used, wire breaks are reliably prevented.
    Type: Grant
    Filed: April 26, 2004
    Date of Patent: February 6, 2007
    Assignee: Elpatronic AG
    Inventors: Eugen Müller, Jean-Paul Ruscher
  • Patent number: 6881919
    Abstract: A powder feed nozzle for laser welding applications including a multiple outlet nozzle tip for focusing a discharged powder stream. The multiple outlet nozzle tip disperses multiple outlet streams and includes a powder discharge outlet and at least one focus gas discharge outlet, radially spaced from the powder discharge outlet, for dispersing a powder stream and a gas stream. Powder flows from a powder source through a powder channel to discharge a powder stream. Focus gas flows through a focus gas channel angled relative to the powder channel to discharge a focus gas stream.
    Type: Grant
    Filed: December 26, 2003
    Date of Patent: April 19, 2005
    Assignee: Aeromet Corporation
    Inventors: Clarence L. Pyritz, Frank G. Arcella, Michael A. House
  • Publication number: 20040195210
    Abstract: Where can bodies of sheet metal are welded between the welding rollers of a welding machine, the welding current is not applied to the welding rollers until the body is between the welding electrode rollers. In this way, the quality of the weld at the initial weld point is improved, and where intermediate wire electrodes are used, wire breaks are reliably prevented.
    Type: Application
    Filed: April 26, 2004
    Publication date: October 7, 2004
    Inventors: Eugen Muller, Jean-Paul Ruscher
  • Patent number: 6747235
    Abstract: Where can bodies of sheet metal are welded between the welding rollers of a welding machine, the welding current is not applied to the welding rollers until the body is between the welding electrode rollers. In this way, the quality of the weld at the initial weld point is improved, and where intermediate wire electrodes are used, wire breaks are reliably prevented.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: June 8, 2004
    Assignee: Elpatronic AG
    Inventors: Eugen Müller, Jean-Paul Ruscher
  • Patent number: 6710291
    Abstract: A process forms workpieces in a forming system with at least one forming station. The workpieces are transported from or to the at least one forming station. Outside the time period provided for the forming of a certain workpiece, a machining takes place in the forming system with a local energy feed on this workpiece.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: March 23, 2004
    Assignee: Schuler Pressen GmbH & Co., KG
    Inventors: Konrad Wegener, Hans Hofele
  • Patent number: 6566624
    Abstract: A welding material in positioned in electrically conductive relation between exterior surface portions of first and second weldable members, such as hydroformed tubes, at a location where the first and second weldable members are to be joined. A welding device comprises first and second electrodes or conductive ends that extend along substantially the entire extent of first sides of the first and second weldable members, respectively. The first and second conductive ends include first and second concave recesses, which nest with the first and second weldable members, respectively. Electrical current is applied across the first and second weldable members by the nesting first and second conductive ends such that the applied current melts the welding material and thereby welds the exterior surface portions to one another. The welding device can be mounted on a robotic mechanism, which can move the welding device between first and second welding positions.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: May 20, 2003
    Assignee: Magna International Inc.
    Inventors: Gianfranco Gabbianelli, Victor J. Malczewski, Richard Ashley
  • Patent number: 6452128
    Abstract: In a rolled seam welding machine which can be fed from the front for producing a lap seam, the welding roller which is disposed in front of the Z rail can be swung away in order to facilitate automatic feeding of the welding stock into the Z rail.
    Type: Grant
    Filed: August 29, 2000
    Date of Patent: September 17, 2002
    Assignee: Elpatronic AG
    Inventor: Eugen Müller
  • Patent number: 6345425
    Abstract: An apparatus includes a scoring device for making transverse score lines on a roll of sheet material, a dimpler device or dimpler roller for making dimples adjacent the score lines at predetermined width locations, and a rollformer adapted to continuously form the sheet material into a tubular shape with channels. A welder is positioned in line with the rollformer and is adapted to weld the tubular shape into a permanent tube. A break off device positioned in line with the rollformer is adapted to break off sections of the tube at the score lines as the permanent tube exits the rollformer. The dimpler device is adapted to form an “in” dimple and an “out” dimple at locations coordinated with the score lines and with a width of the sheet material so that the “out” dimple forms a stop configured to slip into a channel formed in the sheet material by the rollformer but that abuts the “in” dimple which is formed at an end of the channel.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: February 12, 2002
    Assignee: Shape Corporation
    Inventors: James J. Rosasco, Douglas L. Witte, Peter Sturrus
  • Publication number: 20020011466
    Abstract: Where can bodies of sheet metal are welded between the welding rollers of a welding machine, the welding current is not applied to the welding rollers until the body is between the welding electrode rollers. In this way, the quality of the weld at the initial weld point is improved, and where intermediate wire electrodes are used, wire breaks are reliably prevented.
    Type: Application
    Filed: July 27, 2001
    Publication date: January 31, 2002
    Inventors: Eugen Muller, Jean-Paul Rusher
  • Patent number: 6328197
    Abstract: A container body is made from a composite sheet having a metal layer which has at least one side covered by a corrosion-resistant layer, such as a layer of thermoplastic. The sheet is moved under one or more high-pressure water jets which remove a strip of the corrosion-resistant layer in the path of the water stream, leaving an exposed area. The composite sheet may be segmented as necessary to form blanks suitable for forming individual container bodies. Each blank is formed generally into a tube or cylinder so that the corrosion-resistant layer faces interiorly, and so that the exposed areas are respectively located at overlapping ends of the blank. The overlapping, exposed areas are then welded along a seam, forming a seal.
    Type: Grant
    Filed: February 28, 1998
    Date of Patent: December 11, 2001
    Assignee: United States Can Company
    Inventor: Jean Gapihan
  • Patent number: 6288355
    Abstract: To weld a workpiece rounded from plane metal sheet on a seam welding machine, the workpiece is introduced into a preform (7) whose internal shape is approximately the same as the workpiece. Stops (11, 12, 14) are used to fix the workpiece in place in the preform, and the workpiece is then moved together with the preform (7) towards the welding rollers and welded. To this end the preform (7) is arranged on a platform (6) which in its turn is arranged on a movable carriage (3) in the welding machine (1). Welding with the preform makes it possible to weld together any desired sheet metal workpieces, including those which are not uniformly rounded because, for example, they are formed from blanks incorporating recesses.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: September 11, 2001
    Assignee: Elpatronic AG
    Inventor: Jochen Bonsen
  • Patent number: 6215084
    Abstract: In a guide and calibrating tool for guiding container bodies for welding, at least one of the guide rollers is driven. The drive is pneumatic, by compressed air blown by a nozzle onto recesses in the roller. The roller is driven only initially upon restart of the welding machine or in the event of a break in the passage of a series of bodies, in order that no braking is caused by the arrival at the guide tool of the first (and possibly second) body. This enables the gaps between the bodies to be kept more constant even at the start of a series of bodies to be welded, and the first bodies to be welded do not suffer increased slip between the bodies and the welding electrodes.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: April 10, 2001
    Assignee: Elpatronic AG
    Inventors: Marcel Oberholzer, Hermann Schuppisser, Urs Gehrig, Markus Weber
  • Patent number: 6160235
    Abstract: Resistance welds on overlapped sheets of metal, such as the welded side seam of 3 piece cans, are monitored by measuring the width of the extrusion (5, 6) formed by material flowing out from the edge of the overlapped sheets (1, 2) caused by the welding process. The width of the extrusion (5, 6) is interpreted in terms of the temperature of the weld, and the welding process can be adjusted accordingly. The measurement of the extrusion width can be done optically.
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: December 12, 2000
    Assignee: Carnaudmetalbox (Holdings) USA Inc.
    Inventor: David Matthew Lynch
  • Patent number: 6043448
    Abstract: A method for welding using an on/off switching control. The switching control forms a wave cycle with a plurality of peaks. Within a half wave cycle (1/2f) of welding current f, the wave form takes the shape of an inclined straight line A rising to a predetermined current value S1, a pause in the current which causes a straight line B to extend from upper end of line A, a voltage drop as shown by straight line C, which is shown as a straight line from B to a predetermined current drop, a drop pause as shown by straight line D and at least another current rise and current pause extending from straight line D, wherein all the welding periods are of the same time duration so that welding nuggets are evenly formed.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: March 28, 2000
    Inventors: Kazuhiko Yokoya, Johichi Gotoh
  • Patent number: 5951885
    Abstract: In a roller seam welding machine, the upper welding roller is led through a welding-force adjustment device with two spring elements. One spring is already effective when the initial deflection of the welding roller occurs. The other spring comes into operation only when a certain deflection (D) is reached. A marked improvement in weld quality can be obtained in this way, particularly at the start of the weld seam.
    Type: Grant
    Filed: May 1, 1997
    Date of Patent: September 14, 1999
    Assignee: Elpatronic AG
    Inventors: Nobuo Takahashi, Kiyoshi Kobayashi, Akira Takamatsu, Daniel Wenk
  • Patent number: 5925264
    Abstract: An apparatus/method for detecting contamination during welding is disclosed. In one embodiment, contamination is detected during the welding of overlapping metal portion used in the production of can bodies. The apparatus monitors the voltage supplied to a welding electrode during welding. When the voltage increases above a predetermined level, which may indicate the presence of contamination, the electrical energy is directed away from the welding roller before the rollers pass the area of contamination. The diverted electrical energy is directed to a short circuiting device, such as a parallel combination of silicon control rectifiers. As such, the electrical energy may be directed away from the welding rollers to prevent damage to the rollers.
    Type: Grant
    Filed: April 15, 1997
    Date of Patent: July 20, 1999
    Assignee: Ball Corporation
    Inventor: Elie E. Mouannes
  • Patent number: 5841090
    Abstract: For butt welding or lap welding container bodies, each body is guided between an outer current-carrying electrode roller and an inner roller. According to the invention the inner roller is movably mounted and exerts an opposing pressure to the rigidly mounted outer roller. This results in improved weld quality.
    Type: Grant
    Filed: July 31, 1996
    Date of Patent: November 24, 1998
    Assignee: Elpatronic AG
    Inventor: Peter Taiana
  • Patent number: 5841094
    Abstract: For welding sheet-metal blanks coated with electrically conductive material, the thickness of the coating is measured with a measurement device. The welding current source controls the welding current I as a function of the film thickness reading obtained, to keep the power input into the weld zone essentially constant.
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: November 24, 1998
    Assignee: Elpatronic AG
    Inventor: Michael Baumgartner
  • Patent number: 5679272
    Abstract: When welding a series of container bodies, the welding speed is at first increased to prevent the first body from colliding with the second body at the intake to the welding machine. The welding speed is then reduced to a rated welding speed V.sub.s at which minimum gaps are maintained between successive bodies.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: October 21, 1997
    Assignee: Elpatronic AG
    Inventor: Harry Aderhold
  • Patent number: 5676858
    Abstract: The lower welding wheel (2) of a resistance seam welding machine is vertically adjusted by providing retaining pieces (10) for the stator (8) of the electrode roller head, which are able to position the electrode wheel head in different vertical settings on the welding arm (1) of the machine. This makes it possible to eliminate the vertical adjustment for the guide piece (4), allowing welding to be carried out more accurately.
    Type: Grant
    Filed: November 8, 1995
    Date of Patent: October 14, 1997
    Assignee: Elpatronic AG
    Inventor: Rainer Gantenbein
  • Patent number: 5622637
    Abstract: In a seam welding process for overlapping sheets, in particular for welding can bodies, the welding force is momentarily reduced upon each insertion of a can body between the welding rollers. This keeps the welding pressure constant even at the start of a can body. In this way the power input to the sheet can be kept constant even at the start of a can body, and the weld quality even at the start of a can body satisfies requirements.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: April 22, 1997
    Assignee: Elpatronic AG
    Inventor: Peter Taiana
  • Patent number: 5489757
    Abstract: A process and apparatus for resistance-welding produce a welding current which pulsates in periodic half-waves, in particular an alternating current. The, welding current is generated from a primary alternating voltage which is chopped n times (n>1) in each half-wave and pulse width modulated in order to regulate the welding current. A regulator is provided and has a storage device containing the current nominal values for each chopping interval, corresponding to the welding current form, for comparison with each actual current value determined in each chopping interval.
    Type: Grant
    Filed: March 3, 1992
    Date of Patent: February 6, 1996
    Assignee: Elpatronic AG
    Inventors: Hubert Schuermann, Werner Sutter, Markus Weber
  • Patent number: 5420389
    Abstract: The disclosed bearing mount includes a bearing with inner and outer raceways and rollers operating between the raceways, the raceways being fixedly held fast relative to separated structures and the rollers rotatably supporting them and the structures relative to one another. The rollers of the bearing are formed of electrically and magnetically nonconductive material, specifically comprised of silicon nitride material. This bearing mount is effective for operation within a pulsed high energy electrical circuit or within the magnetic fields generated thereby, as in an inner roller electrode or an hour glass roll used in an electric-resistance can welder, inasmush as it isolates the structures electrically from one another via the bearing mount independently of other insulator devices, while operating without magnetic roller polarization and increased roller collisions.
    Type: Grant
    Filed: September 24, 1993
    Date of Patent: May 30, 1995
    Inventor: Joseph R. Davies
  • Patent number: 5366137
    Abstract: The can body to be welded in a welding station is shaped by gradually bending flat metal sheets zone by zone along a linear conveying route until the can body has been shaped. This linear conveying route at the same time leads to the welding station. In this manner can bodies can be produced and welded at a fast rate.
    Type: Grant
    Filed: June 3, 1993
    Date of Patent: November 22, 1994
    Assignee: Elpatronic AG
    Inventors: Peter Gysi, Armin Ineichen, Gideon Levy
  • Patent number: 5290990
    Abstract: The seam welding machine with welding arrangement 10 has a lower part (1) and an upper (2). Load-bearing components are upper and lower longitudinal girders (20, 21) with a rigid connection (3, 4) between them. For clamping sheet blanks (7, 8) for welding, two clamping blocks are provided, each with upper and lower pressure beams (24, 25); at least the upper pressure beams (24) can be raised and lowered by means of jacks. For longitudinal transport of workpieces (7, 8) along the weld axis (Z), each beam has a feed unit (40, 41). Each feed unit comprises a longitudinal guide extending in the direction of the axis (Z), a slide, with clamping devices, guided on this longitudinal guide, and a reversible linear drive connected to the slide.
    Type: Grant
    Filed: July 21, 1992
    Date of Patent: March 1, 1994
    Assignee: Elpatronic AG
    Inventors: Walter Bischofberger, Karl Wueger
  • Patent number: 5249725
    Abstract: The invention is related to an apparatus for re-using a copper wire having been used once for mash seam welding in a mash seam welder for mash seam welding a lap formed by overlapped opposite side edges of a metal sheet or like blank between upper and lower roller electrodes via copper wires. The apparatus is provided in a portion of or in relation to the mash seam welder for taking up the copper wire having been used once for welding and squeezed to have a substantially flat sectional profile as taken-up wire and feeding again the taken-up wire as rewound wire to the mash seam welder to be used again for welding between said upper and lower roller electrodes.
    Type: Grant
    Filed: July 17, 1992
    Date of Patent: October 5, 1993
    Assignee: N.P.W. Technical Laboratory Co.
    Inventor: Minoru Nakatsu
  • Patent number: 5171961
    Abstract: A seam weld machine includes a voltage monitoring circuit (9) for determining weld quality. The voltage is sensed by two pick-ups. A first pick-up is in the form of a conductive rider (10), mounted to directly sense the voltage from a weld wire (4). The wire (8) from the second pick-up is short and is fed through a gap in the z-bar (6) of the machine to emerge close to the wire from the first pick-up, thus reducing electromagnetic interference and noise.
    Type: Grant
    Filed: June 28, 1991
    Date of Patent: December 15, 1992
    Assignee: CMB Foodcan plc
    Inventors: Anthony D. Corton, Andrew J. Boyd
  • Patent number: 5122629
    Abstract: A compact resistance seam welding machine wherein the upper electrode roller (14) is provided on a pivotally mounted arm (12) instead of on a pendulum roller head. The lower electrode roller (16), which is disposed below the upper electrode roller (14), is provided on a rigid lower arm (8) as usual. The pivotal mounting (10) of the arm (12) includes a stack of copper foils (102) on the side adjacent to the lower arm (8) and of a steel strip (101) on the side remote from the lower arm (8). The steel strip (101) and the copper foils (102) are each clamped, on the one side to the machine frame (4) and on the other side to the opposite end of the arm (12). The arm (12) is therefore pivotally mounted on the principle of a parallelogram linkage, while the pivotal mounting (10) serves for the transmission of welding current to the upper electrode roller (14) at the same time. The pivotal mounting ( 10) only permits the upper electrode roller (14) a vertical movement up and down.
    Type: Grant
    Filed: August 22, 1990
    Date of Patent: June 16, 1992
    Assignee: Elpatronic AG
    Inventor: Othmar Stieger
  • Patent number: 5103070
    Abstract: A Z rail for welding the longitudinal edges of can bodies has two supporting bodies, each with a longitudinal groove comprising two lateral surfaces which are at least roughly parallel to each other, and a base surface which is at least roughly perpendicular to the lateral surfaces. Each groove has an undercut profile with an enlargement, which separates one of the lateral surfaces from the base surface. An insert of hard material is interchangeably fastened in the enlargement. The insert extends at least to the plane of the opposite lateral surface and has an outer surface directed away from the base surface. These outer surfaces support the respective edges of edge margins of the sheet metal that is to form the can body. The lateral surfaces of the groove in each supporting body are designed for the direct guidance of lateral faces of the sheet-metal edge margin.
    Type: Grant
    Filed: July 5, 1991
    Date of Patent: April 7, 1992
    Assignee: Elpatronic, AG
    Inventor: Niklaus Portmann
  • Patent number: 5089682
    Abstract: A roller electrode combination for use in electric-resistance welders, the electrode having relatively rotatable components separated by very small gaps, and an electrically and thermally conductive liquid is contained by the components across the gaps; the conductive liquid being a gallium dominant composite eutectic mixture where its phase change from liquid to solid begins at possibly 5-8 degrees C. Special controls are provided for the coolant for the roller electrodes, including a sensor to determining its temperature and a heater to preclude its flow through the roller electrode at temperatures below where such phase change might take place. The roller electrodes may be formed of alloys of copper (Cu) and/or a sintered mixture of copper (Cu) and tungsten (W). A protective coating between 0.0025 and 0.025 millimeters thick may be plated on surfaces of the composite copper (Cu) and tungsten (W) roller electrode that come in contact with the conductive liquid.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: February 18, 1992
    Inventor: Joseph R. Davies
  • Patent number: 5081331
    Abstract: Disposed on a central machine portion (10) are two clamping devices (32,34), each for a respective body blank (P.sub.l,P.sub.r), and a welding device (20) for welding together overlapping margins of the blanks (P.sub.l,P.sub.r). Disposed one at each side of the central machine portion (10) are feed tables (80,82) on each of which a blank (P.sub.l R.sub.r) can be fed through one of the clamping devices (32,24), transversely to the proposed weld seam, into an overlapping position. A supporting device (50) is disposed between the two clamping devices (32,34) to support the margin to be welded of the blank (P.sub.l) fed in on one of the two feed tables (80). This supporting device can be moved out of a supporting position in which it supports the margin to be welded of the blank (P.sub.l) in question, into a position of rest in which it allows this margin to come to lie on the margin of the other blank (P.sub.r).
    Type: Grant
    Filed: April 23, 1990
    Date of Patent: January 14, 1992
    Assignee: Elpatronic AG
    Inventors: Eduard Beyer, Floring Cadalbert
  • Patent number: 5064982
    Abstract: An electric resistance seam welding method for a hard-to-weld steel sheet is disclosed which prevents the occurrence of flashes. The steel sheet has metal harder than tin and an intermetallic compound as coating layers, the sheet thickness of the steel sheet is 0.5 mm or less and portions of the sheet are overlapped for welding with an overlapping width in a range from 2.0 times to 2.3 times the sheet thickness.
    Type: Grant
    Filed: August 16, 1989
    Date of Patent: November 12, 1991
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Makoto Kabasawa, Ono Moriaki
  • Patent number: 5060840
    Abstract: A conveying apparatus feeds can body blanks to a welding unit with the longitudinal edges of the can body blanks even, without being offset in the longitudinal direction. The apparatus includes a centrally disposed revolving device (5; 5'; 5") which serves as a transport unit for the can body blanks (1). Rockers (18) are connected by means of swivel axes (5b) to serve as pusher dogs. Each rocker (18) has two feed pins (18c, 18d) at its front end facing the direction of transport. In the pushing position, the feed pins simultaneously contact the rear edge of a can body blank (1) on either side of the longitudinal edges. Each of the rocker arms is provided with a control arm which extends past the swiveling axis and which has a control surface.
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: October 29, 1991
    Assignee: Krupp Maschinentechnik GmbH
    Inventors: Norbert Lentz, Harald Schmidt
  • Patent number: 5017749
    Abstract: Apparatus for resistance welding an elongate seam in a tubular article, comprises a first electrode wheel outside the article, a second electrode inside the article and a continuous electrode wire arranged to pass over the electrodes to provide surfaces of contact between the electrodes and seam material. The second electrode has a stationary block having a guide surface of like curvature to that of the outer electrode wheel so that the contact arcs of wire passing over the guide surface with the seam material is substantially equal to the contact area of wire passing over the external wheel. The use of this stationary inner electrode improves the weld of geometry and permits welding of can bodies of relatively smaller diameter without use of mercury contact bearings.
    Type: Grant
    Filed: December 11, 1987
    Date of Patent: May 21, 1991
    Assignee: CMB Packaging (UK) Limited
    Inventors: Andrew J. Boyd, Andrea M. Webster
  • Patent number: 4956536
    Abstract: Tin cans are pre-calibrated prior to entering between the electrode rollers of an automatic seam welder, by a device installed immediately upline of the final calibration and weld station; such a device comprises one or more sets of rollers, each set aligned transversely so as to describe an internal circumference encompassing the can, and at least one such set comprises cylindrical rollers occupying positions that are fixed radially in relation to the cans passing through.
    Type: Grant
    Filed: August 7, 1989
    Date of Patent: September 11, 1990
    Assignee: Cefin S.p.A.
    Inventor: Luigi Pazzaglia
  • Patent number: 4950192
    Abstract: A method of manufacturing a color display tube in which after the envelope is formed the shadow mask is displaced relative to the display window via movable positioning members provided in the envelope. After the color display tube is assembled a test pattern is displayed on the display screen and is optimized by means of positioning members 23, such that the shadow mask is accurately aligned relative to the display screen 6. The adjusted position is fixed by forming a number of welds, using a laser 33, between the connection means 12 and the support elements 10 in the display window 1.
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: August 21, 1990
    Assignee: U.S. Philips Corporation
    Inventors: Johan A. Rietdijk, Piet C. J. Rens
  • Patent number: 4947013
    Abstract: The guiding apparatus for a body for the production of can bodies having a non-circular cross-section by interconnecting the edges of the body by means of making a longitudinal seam comprises at both of the mutually opposite sides of the body supported symmetrically at circumferential areas two respective supporting rollers operative for a guiding of the body at the height of the edges to be welded and which are supported by their axes of rotation in succession relative to the direction of feed of the body in a rocker. These rockers are pivotably mounted at one end of a double arm transmission lever such that the supporting rollers operating as guides for the bodies abut continuously uniformly the further fed body for a tapering can body. A small pressing force is maintained by a pneumatic cylinder coupled to the other end of the transmission lever.
    Type: Grant
    Filed: April 5, 1989
    Date of Patent: August 7, 1990
    Assignee: Fael S.A.
    Inventor: Hans Rolli
  • Patent number: 4947014
    Abstract: In order to produce can bodies having a noncircular cross-section, preferably a rectangular cross-section with rounded corners, flat planar blanks are initially deformed in a deforming station by a plurality of similar bending tools, each for producing one respective bend, whereby a respective different bend is made at the same time at the various blanks of the stepwise timed advancing blanks. The bending tool includes a shaping member held stationary at the inside and having a curved outer surface end, furthermore, a roller supported in a supporting body and which is subjected to the action of a spring pressing against the supporting body in order to bend the blank located between the shaping member and pressing roller upwardly during movement by a lifting rod pivotably mounted at the supporting body. This proceeds simultaneously in all bending tools provided for one respective bend by a movable part of the deforming apparatus operating as a press.
    Type: Grant
    Filed: October 19, 1988
    Date of Patent: August 7, 1990
    Assignee: Fael S.A.
    Inventors: Hans Rolli, Jakob Muller
  • Patent number: 4940873
    Abstract: An improved roller electrode combination for use in electric-resistance welders, the electrode having relatively rotatable components separated by very small gaps, and a liquid contained by the components across the gaps; where said liquid is nontoxic, and is highly conductive, both electrically and thermally. The conductive liquid is of a composite eutectic mixture of galliun (Ga), indium (In), tin (Sn) and zinc (Zn), by weight, being approximately 61% Ga, 25% In, 13% Sn, and 1% Zn. A protective coating of the order between 0.0025 and 0.025 millimeters thick is plated on said surfaces of at least one of the components, being of material from gold and/or the platinum family, such as rhodium (Rh). Coolant is circulated through one of the components, and special controls regulate the coolant flow and/or warn of unsafe coolant temperatures; and the conductive liquid thermally cools the other component. The rotor component may be formed of a sintered mixture of copper (Cu) and tungsten (W).
    Type: Grant
    Filed: March 28, 1988
    Date of Patent: July 10, 1990
    Inventor: Joseph R. Davies
  • Patent number: 4939335
    Abstract: What is described is a circuit for measuring the effective voltage drop at the welding position (30) between the welding electrodes (14,16) of a resistance seam welding machine. A first measuring loop (40) for measuring a first loop voltage is secured to the lower welding arm (28) close to the lower welding electrode (16) and is in communication with the upper welding electrode (14) through a sliding contact (44). The second measuring loop (60) is taken close to the welding electrodes (14,16) through the head portion of the Z-rail (12). The conductor turns (42,62) of both measuring loops, which lead to an evaluation circuit (48), are twisted together. Thus the stray effects picked up in the two measuring loops are the same. The difference between the two loop voltages formed in the evaluation circuit (48) is the effective voltage drop which is further processed in the usual manner to monitor the quality of the welding seam produced.
    Type: Grant
    Filed: May 25, 1989
    Date of Patent: July 3, 1990
    Assignee: Elpatronic AG
    Inventor: Willi Mueller