Rapid wake up fuser

Details Rapid wake up fuser Rapid wake up fuser

1996-01-11

1997-02-11

Ramirez, Nestor R.

Electrophotography

Image formation

Fixing

399336, G03G 1520

Patent

active

056026358

ABSTRACT:
An apparatus for fusing images to a sheet. A fuser device is provided using a transparent fusing roll having an internal heating device which focuses the energy to a narrow area of the roll adjacent the nip formed with a pressure roll. A transparent fuser roll is used in a pressure nip fusing system to take advantage of the quick response of a focused lamp system while at the same time yielding the desirable image quality attributes of the pressure nip in two roll fusing. The focused lamp is completely enclosed and the heated region of the paper is within the nip contact region so there exists no possibility of igniting the paper. A lateral temperature smoothing device, or leveling roll, is also provided to maintain a fairly uniform temperature axially across the fuser roll. This is particularly useful for a wide fuser roll, i.e., 17 inches, through which narrower paper, i.e., 11 or 14 inches, is passing to prevent the ends of the fuser roll which do not contact the paper from overheating. A quick start up from cold start is possible so that no standby power is required.

REFERENCES:
patent: 3452181 (1969-06-01), Stryjewski
patent: 3948214 (1976-04-01), Thettu
patent: 4355225 (1982-10-01), Marsh
patent: 4435069 (1984-03-01), Sato
patent: 4563073 (1986-01-01), Reynolds
patent: 4724303 (1988-02-01), Martin et al.
patent: 5087946 (1992-02-01), Dalal et al.
patent: 5390013 (1995-02-01), Snelling

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