Ultrasonic welding apparatus

Details Ultrasonic welding apparatus Ultrasonic welding apparatus

1983-06-20

1985-07-16

Wityshyn, Michael

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

Presses or press platen structures, per se

53479, 156 731, 228 1R, 228 11, 264 23, 4251742, B29C 2708, B65B 5122

Patent

active

045294739

ABSTRACT:
An ultrasonic welding apparatus for providing a closure on plastic film bags wherein the end of the film bags is gathered, twisted or not twisted, and then welded to provide a hermetic seal, includes an anvil having a recess into which the gathered plastic material is placed for welding. The side of the recess is lined with low friction material, such as nylon or Teflon, to accomodate a sliding fit between the resonator and the anvil recess. Absent a close fit between the anvil side surface and the resonator side surface, bag material will escape into such space, thereby preventing a hermetic seal. The low friction material prevents destruction of the opposing surfaces subjected to high intensity vibrational forces.

REFERENCES:
patent: 2675276 (1954-04-01), Daugherty
patent: 3008779 (1961-11-01), Spriggs
patent: 3184354 (1965-05-01), Strother
patent: 3386870 (1968-06-01), Morin
patent: 3518920 (1970-07-01), Bimba
patent: 3763769 (1973-10-01), Bysouth et al.
patent: 4075046 (1978-02-01), MacDonald
patent: 4190690 (1980-02-01), Rabeneck et al.

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