Welding thin thermoplastic film by ultrasonic energy

Details Welding thin thermoplastic film by ultrasonic energy Welding thin thermoplastic film by ultrasonic energy

1985-12-10

1987-05-26

Wityshyn, Michael

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 734, 156 736, 1563084, 1565801, B29C 6508

Patent

active

046683160

ABSTRACT:
Thin plastic film is welded by ultrasonic energy by placing two layers of film upon one another on a supporting surface having a cavity. A source of ultrasonic energy, such as a resonator, is brought with its output surface in close proximity to, but non-contacting relation with, the exposed surface of the films for coupling ultrasonic energy via a thin air or gas column to the films at the area of the cavity. The dissipation of ultrasonic energy causes a weld and when the films are moved relative to the resonator output surface and supporting surfce, a seam weld is achieved.

REFERENCES:
patent: 3508989 (1970-04-01), Lawrence et al.
patent: 3728183 (1973-04-01), Wasco et al.

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