Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container
Patent
1982-11-12
1985-06-18
Coan, James F.
Manufacturing container or tube from paper; or other manufacturi
Container making
Pliable container
493211, 493215, 493927, B31B 190
Patent
active
045239185
ABSTRACT:
An improved method and mechanism for forming a chain of laterally interconnected plastic bags which have confronting releasably interlocking rib and groove profile elements on the inner confronting wall surfaces or at the edge of said surface including advancing a tube or a folded film of plastic bag material having interlocked rib and groove profile elements, forming spaced spot seals at the profile element and alternately at another location to permanently join the layers of material and permanently join the rib and groove elements over the area of the spot, forming lateral seals extending the width of the material at the location of the spot seals to provide side seams for the adjacent bags, and cutting through the material along the center of the seam to partially separate the bags with the cuts extending a predetermined distance partially into the spot seals to control their remaining strength and control the separation force needed to separate adjacent bags.
REFERENCES:
patent: 3411419 (1968-11-01), Becker et al.
patent: 3543379 (1970-12-01), Naito
patent: 3552278 (1971-01-01), Guenther
patent: 3783750 (1974-01-01), Heimeijer
patent: 4041846 (1977-08-01), Lerner
patent: 4175994 (1979-11-01), Norton et al.
patent: 4290467 (1981-09-01), Schmidt
Coan James F.
Minigrip Inc.
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