Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With cutting – punching – piercing – severing – or tearing
Patent
1975-04-02
1977-03-01
Drummond, Douglas J.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With cutting, punching, piercing, severing, or tearing
83544, 83607, 156583, B32B 3106, B26D 508
Patent
active
040100634
ABSTRACT:
A pedagogic sealing apparatus for seaming thermoplastic layers includes a sealing station and a trimming station. The sealing station includes a movable platen jaw which compresses the layers against a fixed jaw. Current flow through a resistance ribbon in the fixed jaw elevates the temperature of the layers to provide a fused seam between the layers. An indicator is provided to apprise the student of the termination of a preselected duration heating pulse and the commencement of a cooling cycle. The platen jaw is heated by a resistance ribbon optionally actuated conjunctively with the fixed jaw ribbon to seal layers which require additional heat to fuse their interface.
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patent: 2581977 (1952-01-01), Spalding et al.
patent: 2802086 (1957-08-01), Fener
patent: 2927620 (1960-03-01), Elliott
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