Flexible bags – With closure – Gathered bag mouth
Patent
1986-07-25
1987-11-10
Garbe, Stephen P.
Flexible bags
With closure
Gathered bag mouth
53479, 156253, 1563096, 156499, 383 94, B65D 3316
Patent
active
047062983
ABSTRACT:
A plastic bag for retaining a content therein and wherein the bag has a gathered throat portion adjacent an end opening thereof, the gathered throat portion being formed by randomly disposed wall portions of the plastic material fused together by two or more rows of adjacent spaced apart fused zones of plastic material disposed about a plurality of needle holes. The apparatus comprises at least one set of opposed gathering jaw plates for gathering, in a random fashion, a circumferential portion of the plastic bag adjacent the end opening thereof to form a gathered throat portion. Two pressing plates are disposed on a respective side of the gathered throat portion and are each provided with two or more spaced apart rows of needle receiving bores disposed adjacent one another in differing planes. A needle support block of heat conductive material has needles secured thereto for conducting heat from the block. The block is connected for movement to and away from one of the pressing plates once the pressing plates have moved to a pressing position so that the needles will enter the bores of both pressing plates to puncture a press portion of the gathered throat portion of the bag to fuse plastic material adjacent randomly disposed wall portions of the plastic material in the areas of the penetrating needles and in adjacent spaced apart planes.
REFERENCES:
patent: 2783599 (1957-03-01), Weikert
patent: 3038651 (1962-06-01), Cloudsley
patent: 3111794 (1963-11-01), Spolsino
patent: 3358905 (1967-12-01), Soesbergen
patent: 3372797 (1968-03-01), Grevich
patent: 3374598 (1968-03-01), Piroutek
patent: 3432980 (1969-03-01), Seiferth et al.
patent: 4159077 (1979-06-01), Hall
patent: 4188769 (1980-02-01), Bright, Jr.
Lipes Arnold
Soga George
Garbe Stephen P.
Packaging Automation Machinery Co. Ltd.
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