Machine for applying a semipermeable patch on a plastic bag

Details Machine for applying a semipermeable patch on a plastic bag Machine for applying a semipermeable patch on a plastic bag

1976-01-27

1976-10-26

Drummond, Douglas J.

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

With cutting, punching, piercing, severing, or tearing

156556, 156583, B32B 3100, B30B 1534

Patent

active

039881954

ABSTRACT:
The machine includes a horizontal support for a plastic bag and a vertically movable heat-sealing head pivoted to the support for upward movement through an aperture in the support to contact the plastic bag. A vertically movable pressure platen having a vacuum head for holding a patch thereon is mounted directly above the heat-sealing head and is adapted to be moved into engagement with the plastic bag so that the patch can be heat-sealed to the bag. A cutter is mounted adjacent the pressure platen for reciprocating movement along an oblique path to intersect the aperture in the support directly beneath the pressure platen to provide a slit in the plastic bag prior to the heat-sealing of the patch on the bag over the slit.

REFERENCES:
patent: 2865261 (1958-12-01), Seragnoli
patent: 3115731 (1963-12-01), Blythe et al.
patent: 3434908 (1969-03-01), MacDonald
patent: 3490979 (1970-01-01), Calvert et al.

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