Process for applying a patch

Details Process for applying a patch Process for applying a patch

1988-01-25

1989-05-23

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156256, 156517, 156519, 53137, 53138R, 493215, B32B 3100

Patent

active

048327760

ABSTRACT:
Apparatus for making a plastic film bag having bag mouth lips projecting beyond a heat-seal band closing the bag mouth applies a stiffening patch bonded to the interior or exterior of a bag mouth lip between the heat-seal band and the bag mouth end for reclosing the bag mouth after the heat-seal band has been opened. For reclosing the bag mouth, the process applies stiffening patches to a web of sheet material for making bags at the time that the bags are formed and filled by clipping from a strip of patch-making material patch pieces having pressure-sensitive adhesive on one side. Apparatus performing the process transfers such patch pieces from a rotary shear onto the bag-making material by an orbiting transfer member having a suction pickup to pick up a patch piece and blowing means for subsequently detaching the patch piece from the transfer member and depositing it onto the web of bag-making material.

REFERENCES:
patent: 2717710 (1955-09-01), Baker et al.
patent: 3250659 (1966-05-01), Jackson
patent: 3431827 (1969-03-01), Wahle et al.
patent: 3553933 (1971-01-01), Seko
patent: 3784545 (1974-02-01), Lucas
patent: 4288967 (1981-09-01), Seko et al.
patent: 4288968 (1981-09-01), Seko et al.
patent: 4448629 (1984-05-01), Malthouse
patent: 4650536 (1987-03-01), Ceraso

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