Xerographic toner fixing station

Details Xerographic toner fixing station Xerographic toner fixing station

1980-08-28

1982-02-16

Moses, R. L.

Photocopying

Including fiber optics

219216, 226181, 226188, G03G 1500

Patent

active

043156827

ABSTRACT:
A fuser roll apparatus in a toner fixing station associated with an electrophotographic or xerographic device for fixing a toner image onto a copy sheet by the application of heat and pressure. The fusing apparatus includes a heated fuser roll and a pair of smaller, spaced backup rolls, each of the backup rolls having a peripheral surface covering of a different elastic modulus from the other. The backup rolls are arranged so as to cooperate with the heated fuser roll to define two fusing nips through which a copy sheet sequentially passes. The downstream roll has the harder peripheral surface covering. As the copy sheet passes through the two nip areas in succession, the downstream backup roll tends to pull against the upstream backup roll. Thus, the copy sheet is tensioned as it passes over the portion of the surface of the heated fuser roll between the two backup rolls.

REFERENCES:
patent: 3707215 (1972-12-01), Familant
patent: 3945726 (1976-03-01), Ito et al.
patent: 3995551 (1976-12-01), Mitter
patent: 4124156 (1978-11-01), Waffner
patent: 4163892 (1979-08-01), Komatsu et al.
patent: 4172975 (1979-10-01), Noda
British Journal of Applied Physics, vol. 9, Nov. 1958 pp. 428-433.

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