Ultrasonic method of producing a score in a thermoplastic film p

Details Ultrasonic method of producing a score in a thermoplastic film p Ultrasonic method of producing a score in a thermoplastic film p

1991-04-11

1993-04-13

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 70, 264564, 264565, 264566, 264146, 264159, 4251742, 425291, B29C 5306

Patent

active

052020657

ABSTRACT:
A method of creating a score in a pouch formed from a thermoplastic film is described. Ultrasonic energy is used to create the score in a film that is later formed into a pouch. The score can be used to open the pouch by pulling opposite sides of the scored area. The ultrasonic force is applied to the film as a part of a downstream process in a blown film manufacturing line to produce the pouch.

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