Release agent management system for a heat and pressure fuser

Details Release agent management system for a heat and pressure fuser Release agent management system for a heat and pressure fuser

1986-03-31

1988-08-23

Grimley, A. T.

Photocopying

Including fiber optics

118 60, 118101, 118260, G03G 1510

Patent

active

047664568

ABSTRACT:
A RAM system suitable for use in copier and printing machines having a relatively slow (i.e. 2 inches per second) process speed while avoiding the prior art problem of excess oil application, particularly outside the copy area. The RAM system contains a supply of release agent material which permits operation without frequent addition of oil to the supply yet without fear of oil spillage.
The RAM system comprises a very thin (i.e. 0.006 inches thick) wick one end of which contacts a supply of release agent material such as low viscosity silicone oil while an intermediate portion thereof is held in contact with a fuser roll member.
An oil reservoir containing a pad is provided. The pad serves as the supply of oil for the one end of the wick. The majority of the oil is contained in the pad, therefore, the problem of spillage found in prior art devices is obviated. The one end of the wick is disposed between the bottom of the pad and the reservoir while the rest of it extends up one vertical wall of the reservoir to a height above the top of the pad sufficient to insure movement of the oil through the wick by capillary action. From the top of the reservoir, the wick follows the outside of the vertical wall in a downward direction and is then routed adjacent the bottom thereof to an oppositely disposed vertical wall.
The wick contacts the fuser roll in an area beneath the reservoir and the reservoir is supported such that the weight thereof serves to effect pressure engagement between the wick and the fuser roll. In order to create an elongated area (nip) of contact between the wick and the roll surface a pressure deformable backing pad is provided.

REFERENCES:
patent: 2975464 (1961-03-01), Schultz
patent: 4182263 (1980-01-01), Naeser et al.
patent: 4277161 (1981-07-01), Calabrese
patent: 4359963 (1982-11-01), Saito et al.
patent: 4378752 (1983-04-01), Knechtel
patent: 4568275 (1986-02-01), Sakurai
patent: 4573428 (1986-03-01), Ogino et al.
patent: 4633805 (1987-01-01), Katsuya et al.

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