Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1972-05-23
1977-05-24
Van Horn, Charles E.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156 86, 156201, 156203, 156215, 156218, 156229, 156272, 156306, B29D 2310
Patent
active
040253759
ABSTRACT:
A method and apparatus for continuous welding together of sheets of the type in which adhesion is derived from the melting and re-hardening of the sheet material itself rather than from an externally applied adhesive. A sheet, formed into a tube with the opposite sides overlapping, is tensioned longitudinally so as to form longitudinally extending stress lines which appear as ripples, at least at the overlapping edges such that the sheets weld at the bottom of the valleys formed by the ripples. As the tensioned sheet moves continuously between a heating element and a backing plate, both of which are stationary relative to the tube forming means, the sheets weld as the material from the sides of the valley of at least one sheet runs to the bottom of the valley, at which point the weld bead is formed, whereby the thickness of the weld bead may be more than twice the thickness of the original unheated sheet material.
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Lewris Basil J.
Mira-Pak Inc.
Van Horn Charles E.
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