Device for welding flatly stacked workpieces in the ultrasonic w

Details Device for welding flatly stacked workpieces in the ultrasonic w Device for welding flatly stacked workpieces in the ultrasonic w

1998-03-19

1999-12-21

Sells, James

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

Presses or press platen structures, per se

156 731, 1565801, 1565835, B30B 506

Patent

active

060044276

ABSTRACT:
A device for welding flatly stacked workpieces, preferably layers of tubular segments in the manufacture of sacks, by means of welds of predetermined contour in the ultrasonic welding process comprises at least one sonotrode, which is adjustable, but is stationary during the welding operation and at least one contour roller, which is assigned to said sonotrode and whose shell is provided with a contour profile, which matches the contour of the welds to be formed and which rotates at a circumferential speed that corresponds to the speed of the workpieces passing through. To weld together quite well flatly stacked workpieces, even when they tend to unfold or spread apart, the sonotrode is enclosed by a continuous belt or strap, revolving over deflecting and drive rollers. The carrying run of the belt, passing the active surface of the sonotrode, forces the workpieces to be welded against the contour roller.

REFERENCES:
patent: 4436585 (1984-03-01), Moodie et al.
patent: 5228947 (1993-07-01), Churchland
patent: 5589014 (1996-12-01), Hicks
patent: 5591298 (1997-01-01), Goodman et al.
patent: 5672236 (1997-09-01), Frey

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