Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Automatic and/or material-triggered control
Patent
1997-06-18
1999-01-26
Sells, James
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Automatic and/or material-triggered control
156502, 156510, 156580, 1565831, 100 33PB, B31F 500
Patent
active
058633782
ABSTRACT:
An apparatus for heat sealing two pieces of plastic strapping together. The apparatus includes a heating element, upper and lower pressure elements, a rotation actuation member and a sealing actuation assembly. The heating element is movable between an engaged heating position --which orients the heat element between the pieces of plastic strapping --and a retracted position. The lower pressure element exerts pressure upon at least the bottom piece of plastic strapping during the heating of same by the heating element, and, in cooperation with the upper pressure element, upon both pieces of plastic strapping again during direct attachment of the melted portions of the plastic strapping after the heating element is relocated to its retracted position. The lower pressure element further releases pressure while facilitating the placement and removal of the pieces of plastic strapping between the upper and lower pressure elements. The lower pressure element also at least partially disengages the plastic strapping from the heating element so as to facilitate its retraction. The rotation actuation member is operably associated with the sealing actuating assembly to impart rotation to same, while sequencing the operations of the heating element and the upper and lower pressure elements through a uni-directional, rotational cycle, to, in turn, ultimately weld the pieces of plastic strapping together.
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Nelson Timothy H.
Panjwani Srichand Sitaldas
Midwest Industrial Packaging, Inc.
Sells James
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