Image-forming apparatus with a fixing device for fixing a toner

Details Image-forming apparatus with a fixing device for fixing a toner Image-forming apparatus with a fixing device for fixing a toner

1994-08-03

1996-12-03

Dang, Thu Anh

Photocopying

Contact printing

Light boxes

219216, 355282, 355295, 492 53, G03G 1520

Patent

active

055813402

ABSTRACT:
An image-forming apparatus for forming an image on a sheet-like material, having an image-forming unit for forming a toner image on the sheet-like material, and a heated roller for heating the sheet-like material with the toner image. The heated roller includes a surface layer having a heat-shrunk fluorine resin. A pressure roller is arranged in rolling contact with the heated roller, for pressing the sheet-like material against the heated roller. A member for providing at least one of the following conditions: a) temperature at the surface of the heated roller of at least 200.degree. C.; b) a pressure between the heated roller and the pressure roller of at least about 72.5 N; c) a hardness of the surface of the pressure roller of at least about 40.degree. (ASKER-C system); and d) an elastic surface layer on the pressure roller having a thickness of at most about 50 .mu.m and which comprises a fluorine resin.

REFERENCES:
patent: 3912901 (1975-10-01), Strella et al.
patent: 4812873 (1989-03-01), Inagaki et al.
patent: 4842944 (1989-06-01), Kuge et al.
patent: 4985733 (1991-01-01), Kurotori et al.
patent: 5289246 (1994-02-01), Menjo
patent: 5289247 (1994-02-01), Takano et al.
patent: 5327202 (1994-07-01), Nami et al.
patent: 5331385 (1994-07-01), Ohtsuka et al.

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