Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With separate heating means for work
Patent
1977-02-14
1978-08-22
Drummond, Douglas J.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With separate heating means for work
11 1AD, 156583, 219243, 219505, B32B 3100, B42C 1900, H05B 1100
Patent
active
041087135
ABSTRACT:
A low mass electrical heater for rapid heating of a heat reactivatable adhesive, such as used in laminating machines or book binding machines, incorporates a low mass, low heat capacity metal plate. The plate is constructed of either magnesium or aluminum and has a thickness of less than 0.1 inch. An electrical insulating layer comprising silicone rubber is bound to one surface of the metal plate and a resistance type heating element is arranged in a pattern on the insulating layer. The heating element preferably has a high watt density of greater than 20 watts/in..sup.2. A fast-acting temperature sensor is arranged between the heating element and the first silicone layer. The sensor preferably is a thermistor having a thickness of less than 0.06 inches. When the electrical heater is used in a book binder, the heater is mounted on a pivoting means and the book binding to be heated has its backbone positioned on a heat transfer surface of the heating element metal plate. The metal plate then oscillates to permit leaves of the booklet to be slashed into an adhesive layer which is melted by the electrical heater. When used in a laminating machine, the heater is positioned adjacent a pouch to be laminated such that heat is transferred to the heat reactivatable adhesive of the pouch to permit sealing.
REFERENCES:
patent: 3153140 (1964-10-01), Theodore et al.
patent: 3283284 (1966-11-01), Eisler
patent: 3569665 (1971-03-01), Hager
patent: 3973787 (1976-08-01), Staats et al.
Drummond Douglas J.
General Binding Corporation
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