B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 65/08 (2006.01) B29C 59/00 (2006.01) B42D 1/08 (2006.01) B29C 53/06 (2006.01)
Patent
CA 2246977
There is provided an improved ultrasonic welding method for simultaneously welding a plurality of plastic sheets to a compressible album cover comprising a layer of plastic compatible for ultrasonic welding to the plastic sheets. The improved method generally comprises the steps of: (a) providing an ultrasonic die press having opposing compression die members, the die members including at least one compressed seam producing die surface and at least one ultrasonic welding surface; (b) placing the plurality of plastic sheets on the plastic layer of the album and placing this assemble between the opposing die members; (c) engaging the ultrasonic die press to create at least one compression seam by compressing said album cover between the opposing die members and to create at least one ultrasonic weld between the plastic sheets and the plastic layer thereby obtaining an album with ultrasonically welded sheets; (d) disengaging the die press and removing the completed album therefrom. The present invention also contemplates a method wherein the welding seams in the album cover are obtained by a simple compression die by placing the album cover in a compression die prior to placing thereon the plastic sheets and completing the ultrasonic welding. Also contemplated is a method of creating fold lines in the album cover simultaneously with the welding seam lines.
Albums Df Ltee
Bcf Llp
Trico Industries Inc.
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