Heat cutter for plastic wrapping films using film resistors

Details Heat cutter for plastic wrapping films using film resistors Heat cutter for plastic wrapping films using film resistors

1984-02-06

1986-02-04

Albritton, C. L.

Electric heating

Heating devices

Tool or instrument

53219, 83170, 219214, 338308, H05B 100, B65B 1102

Patent

active

045688184

ABSTRACT:
A hand wrapper for plastic film that thermally cuts a length of plastic wrapping film withdrawn from a supply roll includes an improved heat cutter that uses film resistors instead of a metal blade or a single heater wire for the cutting because the film resistors are not likely to break and they have low heat capacity which permits instantaneous cutting of the plastic film without requiring preheating which causes large power losses.

REFERENCES:
patent: 2242645 (1941-05-01), Frost
patent: 2759618 (1956-08-01), Vogt
patent: 2929907 (1960-03-01), Collins
patent: 3131278 (1964-04-01), Rosenthal
patent: 3551259 (1970-12-01), Schwarzkopf
patent: 3579949 (1971-05-01), Michels
patent: 3584572 (1971-06-01), Apicella
patent: 3616990 (1971-11-01), Powell
patent: 3716132 (1973-02-01), Lewyckyj
patent: 3736406 (1973-05-01), Vossen et al.
patent: 4017712 (1977-04-01), Baraff et al.
patent: 4139669 (1979-02-01), Chang

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