Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With casting – plastic molding – or extruding means
Patent
1993-05-18
1995-01-24
Aftergut, Jeff H.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With casting, plastic molding, or extruding means
156198, 156289, 1563084, 1563096, 156311, 264323, 425384, B32B 3120, B32B 3126
Patent
active
053840020
ABSTRACT:
The open edge of a plasticboard is moved into a heating and sealing unit having a metal form with a U-shaped cross-section. A spacing tape and a release tape line the metal form. An induction or resistance heater is coupled to the metal form to raise the temperature thereof and heat the open edge to form a molten plastic edge wall, with the outer edges of the edge wall in sealing engagement with the form. The molten plastic fills the cavity between the form and the edge wall and forms a solid, continuous end wall upon cooling of the molten plastic. A batch sealing unit has a form moved directly into engagement with the edge wall to be sealed. A continuous sealing unit has an elongated form. A conveyor moves the plasticboard through the form in a continuous flow path with the form inclined to the path of the edge board to establish relative lateral movement. A cooling unit cools the end wall as the board moves from the form. A release unit is located between the heating and sealing unit and the edge wall to insure release from the sealing unit and to accommodate any offset surface portion in the edge wall and thereby totally confine molten plastic and form a smooth end wall.
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Leatherman Alfred F.
Repik Clyde P.
Aftergut Jeff H.
Heller, Jr. William C.
Yoder Michele K.
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