Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Automatic and/or material-triggered control
Patent
1976-06-30
1977-12-20
Drummond, Douglas J.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Automatic and/or material-triggered control
156494, 156499, 219511, B32B 3100, H05B 102
Patent
active
040639851
ABSTRACT:
A manually operable combination strapping tool for applying plastic strapping around an object includes a strap-tensioning and gripping mechanism for holding the strap in a tensioned loop around the object with the supply portion of the strap overlapping the leading end thereof, an electric heating element for melting the facing overlapping strap portions, and pressure means for pressing together the melted overlapping strap portions to form a joint therebetween. A heat regulating apparatus for the heating element includes a bimetallic relay having a reference heating means connected in parallel with the heating element for being heated at a rate such that the temperature of the reference heating means is proportional to the temperature of the associated heating element, and normally closed bimetallic switch contacts connected in series between the associated source of electric power and the parallel combination of the reference heating means and heating element, the switch contacts being responsive to heating of the reference heating means to a reference temperature for switching to an open condition de-energizing the reference heating means and the heating element, the switch means being responsive to the cooling of the reference heating means below the reference temperature for switching to a closed condition for energizing the reference heating means and heating element.
REFERENCES:
patent: 3368323 (1968-02-01), Wood
patent: 3397105 (1968-08-01), Takami
patent: 3553624 (1971-01-01), Dalzell et al.
patent: 3581985 (1971-06-01), Thorsteinsson
patent: 3914153 (1975-10-01), Sato
patent: 3944460 (1976-03-01), Karr
Drummond Douglas J.
Interlake, Inc.
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