B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
154/29.02
B29C 65/08 (2006.01) B29C 65/00 (2006.01) B32B 38/04 (2006.01)
Patent
CA 1196260
- 12 - DYNAMIC ULTRASONIC LAMINATING APPARATUS HAVING POST-BONDING PRESSURE ROLL, AND CONCOMITANT METHOD Coenraad Eduard Riemersma ABSTRACT An improved method and apparatus for bonding together juxtaposed webs which are subject to being ultrasonically bonded together such as, for example, thermoplastic films or non-woven thermo- plastic webs or elastomeric films to form a laminate as the webs are being driven forward at a relatively high velocity. The apparatus includes an ultrasonic horn and a power-rotated anvil cylinder which define a bonding passageway there- between, and a rotatable pressure roll which is biased towards the anvil adjacent the downstream end of the bonding passageway to apply a pre- determined level of compressive force to the bonded regions of the laminate issuing from the passageway before the bonds in the bonded regions become fully set upon cooling. In a preferred apparatus embodiment of the invention the anvil has a relief-type bonding pattern on its cir- cumferential surface; and the pressure roll is sufficiently rigid and so configured and disposed that substantially only the portions of the laminate juxtaposed raised elements of the bonding pattern are subjected to such post-bonding com- pression.
420087
Kirby Eades Gale Baker
The Procter & Gamble Company
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