Fused plastic bag closure and apparatus for making same

Details Fused plastic bag closure and apparatus for making same Fused plastic bag closure and apparatus for making same

B - Operations, Transporting

65

D

220/12, 93/66

B65D 33/16 (2006.01) B65B 51/00 (2006.01)

Patent

CA 1260884

FUSED PLASTIC BAG CLOSURE AND APPARATUS FOR MAKING SAME 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.

514377

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