公开(公告)号：US3841947A

公开(公告)日：1974-10-15

申请号：US23633072

申请日：1972-03-20

Applicant: CENTRE NAT ETD SPATIALES

Inventor： BOCQUET M ,  CHATAIN M

IPC: B29C65/00 ,  B29C65/08 ,  B32B31/08 ,  B32B31/16

CPC classification number: B29C65/08 ,  B29C66/0044 ,  B29C66/1122 ,  B29C66/43 ,  B29C66/71 ,  B29C66/7352 ,  B29C66/73921 ,  B29C66/81 ,  B29C66/8122 ,  B29C66/81422 ,  B29C66/81429 ,  B29C66/8167 ,  B29C66/81811 ,  B29C66/8221 ,  B29C66/8242 ,  B29C66/8248 ,  B29C66/836 ,  B29C66/91 ,  B29C66/9241 ,  B29C66/92431 ,  B29K2027/18 ,  B29L2022/022 ,  B29K2067/003 ,  B29K2911/12

Abstract: 1. A device for continuously ultrasonically welding together overlapping edges of very thin films of thermoplastic material, comprising a first operative component in the form of an anvil, a second operative component in the form of an ultrasonic welding head with a welding tool opposite and adjacent said anvil, said operative components being movable relative to each other towards and away from each other, means for guiding said edges in overlapping longitudinal relation between said operative components, yieldable clamping means responsive solely to gravity for continuously and flexibly urging one of said operative components towards the other with a constant force in order to uniformly and continuously clamp the overlapping edges between said operative components, means for continuously supplying power to said welding tool in order to weld together the clamped overlapping edges, an enclosure in which said power supply means is housed, means for circulating coolant liquid through said enclosure and over said power supply means immersed therein to keep the temperature of said tool constant, and drive means for continuously driving at uniform speed the welded overlapping edges longitudinally away from said operative components.