Contact fuser apparatus with release agent management system

Details Contact fuser apparatus with release agent management system Contact fuser apparatus with release agent management system

1987-05-21

1988-09-13

Lawrence, Evan K.

Coating apparatus

With heat exchange, drying, or non-coating gas or vapor...

With solid heat exchange means contacting work

118 70, 118104, 432 60, 432228, G03G 1520

Patent

active

047701161

ABSTRACT:
A heat and pressure roll fusing apparatus for fixing toner images to copy substrates, the toner comprising a thermoplastic resin. The apparatus includes an internally heated fuser roll cooperating with an unheated bare metal backup or pressure roll to form a nip through which the copy substrates pass with the images contacting the heated roll. The heated fuser roll is characterized by a comformable outer layer or surface which by way of example is fabricated from a silicone rubber or "Viton" material to which a low viscosity polymeric release fluid is applied. Release fluid is contained in a sump and the pressure roll is partially immersed in the fluid. Thus, the release fluid is applied to the surface of the internally heated fuser roll via the bare metal pressure roll. The roll structures are such as to provide maximum area of contact in the nip, while minimizing the area of contact between the pressure roll and the copy substrates.

REFERENCES:
patent: 3716221 (1973-02-01), Gorka et al.
patent: 3964431 (1976-06-01), Namiki
patent: 4087676 (1978-05-01), Fukase
patent: 4170957 (1979-10-01), Eddy et al.
patent: 4214549 (1980-07-01), Moser
patent: 4254732 (1981-03-01), Moser

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