Insertion of draw tape strips in draw tape bag manufacture

Details Insertion of draw tape strips in draw tape bag manufacture Insertion of draw tape strips in draw tape bag manufacture

1984-09-20

1986-07-01

Larson, Lowell A.

Manufacturing container or tube from paper; or other manufacturi

With cutting, breaking, tearing, or abrading

Including assembling or disassembling of distinct members

493194, 493225, 493381, 493928, B05B 114

Patent

active

045977500

ABSTRACT:
A method of inserting a continuous, pliable strip into each hem formed along an edge, an edge of one of a pair of superposed panels forming an elongated, continuous web, the hem being formed by turning an edge portion of a panel inward between the panels. Each strip is fed from a position outside the web on the hemmed side of the web, across the hem(s) to a position between the panels within the web, reversed in direction and fed to a position between the portions of the panel forming a hem. Each strip is then turned from a transverse direction to a longitudinal direction and fed longitudinally into the hem. An apparatus for performing the steps of the method is described for use in the manufacture of thermoplastic film draw strip bags and feeds a pair of extremely thin and flexible plastifilm strips into a pair of hems, each formed in one of a pair of superposed panels, eventually forming the sides of the finished bag. A suitable mechanism such as pinch rollers are provided downstream from the apparatus for advancing the web through the apparatus and drawing the web with inserted strips away from the apparatus.

REFERENCES:
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patent: 2798523 (1957-07-01), Barrett
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patent: 3512456 (1970-05-01), Meyer
patent: 3687357 (1972-08-01), Hansen
patent: 3738567 (1973-06-01), Ruda
patent: 3772968 (1973-11-01), Ruda
patent: 3803990 (1974-04-01), Pedersen

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