Package making – Progressively seamed cover web or web folds – With closing of web between package units
Patent
1991-08-23
1992-05-12
Terrell, William E.
Package making
Progressively seamed cover web or web folds
With closing of web between package units
531392, 53552, B65B 920, B31B 190
Patent
active
051116430
ABSTRACT:
A fastener strip, with interlocking profiles of resilient material for purposes of enabling one to reclose a plastic bag after its initial opening, is secured to the bag as the bag is being formed over a cylindrical forming tube. To accomplish this, a continuous carrier strip to which the fastener strip material is mounted is passed into the interior of the forming tube to a port in the tube wall, the strip thereby passing to the outer surface of the tube where it travels part way around the tube circumference, reentering the tube interior through a second port. Between the ports, the carrier strip exposes the fastener strip mounted to it to the web from which the bag is being formed, and the fastener strip is heat fused to the web. A specially constructed combination strip which combines the carrier strip and the fastener strip material allows the two to readily separate once the fastener strip material is bonded to the web. This arrangement permits the fastener strip material to be applied to the bag web after the two interlocking halves of the fastener strip material have been joined.
REFERENCES:
patent: 4355494 (1982-10-01), Tilman
patent: 4617683 (1986-10-01), Christoff
patent: 4709533 (1987-12-01), Ausnit
patent: 4840012 (1989-06-01), Boeckmann
patent: 4874257 (1989-10-01), Inagaki
patent: 5046300 (1991-09-01), Custer et al.
Sun-Maid Growers of California
Terrell William E.
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