Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1988-07-12
1990-12-11
Ball, Michael W.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156 82, 156497, 156498, 156554, 383 65, B29C 6510, B29D 510
Patent
active
049768115
ABSTRACT:
Apparatus for manufacturing plastic film stock material including a sealing head utilizing heated air for continuous welding of reclosable plastic closure strips of plastic film. The sealing head is an elongated block having tapered walls which form a narrow bottom edge. The edge is curved longitudinally to match the curvature of a cooperating platen to define a small welding gap through which pass plastic webs to be welded. The sealing head includes a plurality of air distribution manifolds interconnected by passageways to provide a tortuous path for air flowing through the head from an inlet to an elongated, narrow exit slot formed at the bottom edge of the head. Multiple sealing heads are mounted on a carrier frame for positioning adjacent the platen to produce elongated welds to secure two-piece closure strips to a plastic web.
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Ball Michael W.
Com-Pac International, Inc.
Maki Steven D.
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