Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1975-02-12
1977-01-11
Van Horn, Charles E.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
83 39, 83917, 93 33R, 93 35R, 156227, 156270, 156290, 156306, 156465, 156510, 156529, 156583, B31B 114, B31B 122, B31B 1914, B31B 2114
Patent
active
040025195
ABSTRACT:
Successive pouches are formed from a web of plastic film by advancing the web through a folding station and folding the web along a longitudinal fold line to form a two-ply portion and a single ply portion adjacent thereto. At a sealing station, confronting surfaces of the two-ply folded portion of the web are sealed together along longitudinally spaced apart seal areas extending transversely across the two-ply portion to define a series of successive pouches interconnected by the seal areas. At a flap forming station predetermined waste areas are severed and removed from the single ply portion of the web to form the same into a series of successive flaps extending alongside each of the pouches and adapted for being folded over the pouches to close the same. The predetermined waste areas are quickly severed and removed by first piercing the single ply web at a predetermined point spaced from the free longitudinal edge thereof and corresponding to one end of the waste area, and then severing the single ply portion from the point of piercing along two spaced apart cut lines extending to the free longitudinal edge thereof. The waste area is graspingly engaged closely adjacent to the free longitudinal edge during severing to facilitate severing the waste area free from the remaining web, and is thereafter ejected clear of the advancing web by a blast of air. After heat sealing and flap formation, the web is advanced to a cut-off station and successively severed transversely across the folded web and across a medial portion of each seal area to separate the interconnected pouches from one another.
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Moseley Ronald E.
Stewart Henry G.
Engraph, Inc.
Lewris Basil J.
Van Horn Charles E.
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