Back to results
US 4,744,855 AGranted
Welding machine for foil webs
AssigneePfaff Industriemaschinen GmbH
InventorsBernd Ellenberger, Karlheinz Schafer, Paul Reinheimer
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneePfaff Industriemaschinen GmbH
InventorsBernd Ellenberger, Karlheinz Schafer, Paul Reinheimer
Estimating the term…
A welding machine for foil webs which are overlapped comprises an undercarriage which includes a rectangular frame having longitudinal frame members and laterally adjustable transverse frame members with wheels supporting the frame. A welding device is positioned on the frame and it in the frame includes centering elements which may be adjustable so as to position the welding device accurately in respect to the frame. The welding device itself advantageously includes slots extending inwardly from each side into which a respective foil end is positioned and roller means which engage with one of the foils for guiding it as the undercarriage is moved over the top of the respective foils to be welded together. The undercarriage during the welding device includes a drive from the wheels to the rollers which includes a shaft assembly having a plurality of universal joints. The front of the undercarriage carries a guide which projects forwardly thereof and the front edge of the welding machine includes a caster which is engageable with a wall element in the event that the device is to be used for vertical welding. By the arrangement of two rollers on at least one pivotable roller carrier these rollers can always jointly adapt themselves to any unevennesses of the terrain, so that the rollers correlate with one another in pairs take support on the foil strips with substantially equal contact force both in the case of level and of uneven supports. In this manner a uniform and direction-stable forward movement is obtained.
A welding machine for foil webs which are arranged in overlapping relationship, comprising an undercarriage including a supporting frame and a self contained welding device detachably mounted on said supporting frame, means defined between said welding device and said mounting frame permitting the adjustment of height of said welding device, said mounting frame including a rectangular frame having four wheels, and drive means driving at least one of said wheels.
A welding machine for welding foil webs which are overlapped, comprising an undercarriage including a rectangular frame having longitudinal frame members and laterally adjustable transverse frame members, a wheel assembly secured to said longitudinal frame members at longitudinally spaced locations for the wheel support of said frame, a welding device positioned on said undercarriage, centering means for centering said welding device on said undercarriage, said welding device having sides with foil receiving guide slots extending inwardly from each side so as to position respective foil ends from each side in overlapping relationship to each other within said welding device, rotatable pressing roller means carried by said welding device engageable with at least one of said foils for guiding said foils during welding, and drive means connected to at least one of said wheels and to said roller means to rotate said rollers.
A welding machine for foil webs which are arranged in overlapping relationship, comprising an undercarriage including a supporting frame and a self contained welding device detachably mounted on said supporting frame, said frame comprising a chassis with said welding device supported on said chassis, said chassis being equipped with four rollers arranged in pairs on each side of said welding device and taking support on said foil strips, at least one roller carrier arranged on one set of said rollers being moveable perpendicularly to the running plane of the welding device relative to said chassis, said roller carrier comprising a rod having a joint pin pivotal in a plane perpendicular to the running plane of said welding device and extending crosswise to the forward direction thereof, said chassis comprising two roller carriers designed as links and a centerpiece arranged between said links and articulatedly connected to said links for supporting said welding device.
Dependencies are inferred from the claim text.