Toner image fixing device with flat paper-guiding member

Details Toner image fixing device with flat paper-guiding member Toner image fixing device with flat paper-guiding member

1995-07-26

1996-06-18

Pendegrass, Joan H.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

219216, G03G 1520

Patent

active

055283519

ABSTRACT:
An elastically-deformable heat-resistant belt is made in the form of a cylinder made of nickel, which accommodates therein a heater lamp and a reflecting plate for concentrically directing radiant heat from the heater lamp to the vicinity of an area wherein the cylinder-like belt comes into contact with a recording paper sheet carrying a toner image. When the recording paper is transferred along a guide plate, the driving roller rotates the heat-resistant belt in contact with the recording paper. At this time, the rotating belt and the guide plate are pressed against each other and, furthermore, the movable guide plate is further pushed toward the belt by rotation of an eccentric cam with an operating lever to vary the pressed condition of the belt to form a flat surface of a paper transferring portion with a variable nip width therebetween. The recording paper sheet is transported being pressed against a flat surface of the heat-resistant belt with a suitable nip width and, thereby, the toner image is fixed onto the recording paper by heat. The fixing condition of the device can be freely changed with a freely settable nip width. The device can effectively fix by heat a toner image developed on recording paper, preventing the latter from being curled.

REFERENCES:
patent: 3452181 (1969-06-01), Stryjewski
patent: 5124755 (1992-06-01), Hediger

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