3879256 is referenced by 24 patents and cites 4 patents.

Apparatus for welding thermoplastic sheet-like elements wherein two rows of staggered vibration transmitting members engage one side of the sheet-like elements against anvils located on the other side of said sheet-like elements to produce welds therebetween. Means are provided to advance the sheet-like elements between the anvils and vibration transmitting members, and compression members are located in the spaces between members in the first row of vibration transmitting members with which said sheet-like elements come into contact for maintaining the sheet-like elements uniformly flat across the width thereof.

Apparatus for vibration welding of sheet materials
Application Number
Publication Number
Application Date
December 21, 1972
Publication Date
April 22, 1975
Rust Jr Edgar C
Crompton & Knowles Corporation
B23k 01/06
B06b 03/00
B29C 65/08
B29C 65/00
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