Multiple rate ram system

Details Multiple rate ram system Multiple rate ram system

1992-11-13

1993-06-22

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

118 60, G03G 1520

Patent

active

052219488

ABSTRACT:
A release agent management (RAM) system incorporated in an electrophotograpic printing machine having a heat and pressure fuser assembly to aid in the removal of fused copies from the fuser roll. The fuser assembly includes a heated fuser roll, a pressure roll, a sump containing a quantity of release agent, a pair of metering rolls and a donor roll. Each of the metering rolls is immersed in a quantity of release agent and is able to selectively be brought into contact with the donor roll. The donor roll acts as the transport to transfer release agent from either or both of the metering rolls to the heated fuser roll. The dual roll metering system provides a RAM system which can uniformly provide two or more oiling rates varying with the process speed of the printing machine. It also provides a RAM system which can switch oiling rates without creating oil slugs which ultimately reach the fuser thereby degrading copy quality.

REFERENCES:
patent: 4231653 (1980-11-01), Nagahara et al.
patent: 4352551 (1982-10-01), Iwao
patent: 4593992 (1986-06-01), Yoshinaga et al.
patent: 4905049 (1990-02-01), Bickerstaff et al.
patent: 4942433 (1990-07-01), Stuart
patent: 5099289 (1992-03-01), Kurotori et al.

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