Method and apparatus for sealing a microporous plastic material

Details Method and apparatus for sealing a microporous plastic material Method and apparatus for sealing a microporous plastic material

1977-07-20

1978-11-07

Wityshyn, Michael G.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156273, 156380, 156443, 156502, 219 1053, 219 1081, B29C 2704, B29D 2310

Patent

active

041244273

ABSTRACT:
An apparatus for heat-sealing two lapped end portions of a sheet of microporous plastic material in a substantially envelope or sleeve-like form in which a platen is adapted to receive the sheet material and the opposed walls of the sheet material are forced or urged towards the platen to align the end portions. A predetermined amount of dielectric heat energy is applied to the end portions to seal them together.

REFERENCES:
patent: 2438498 (1948-03-01), Geist, Sr. et al.
patent: 2441699 (1948-05-01), Gramelspacher
patent: 2635127 (1953-04-01), Yardney et al.
patent: 3088118 (1963-05-01), Clark
patent: 3360420 (1967-12-01), Paul et al.
patent: 3580780 (1971-05-01), Klawunn et al.
patent: 3681170 (1972-08-01), Pevitt, Jr.
patent: 3696061 (1972-10-01), Selsor et al.
patent: 3892620 (1975-07-01), Heussy
patent: 3996088 (1976-12-01), Crouch

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