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

B - Operations, Transporting

31

B

154/29.08

B31B 1/90 (2006.01)

Patent

CA 1080596

ABSTRACT OF THE DISCLOSURE The machine includes a horizontal support for a plas- tic 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 di- rectly 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 pres- sure 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.

270349

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