High precision-heating and fusing apparatus

Details High precision-heating and fusing apparatus High precision-heating and fusing apparatus

2006-04-05

2008-11-25

Tran, Hoan H (Department: 2852)

Electrophotography

Control of electrophotography process

Control of fixing

C399S334000

Reexamination Certificate

active

07457557

ABSTRACT:
A high precision-heat fusing device is provided for heating unfused toner images in an electrostatographic reproducing machine. The high precision-heating and fusing apparatus includes (a) an endless rotatable shell defining an interior and having an exterior surface, a first end, a second end, and an axis for rotation; (b) at least six heating elements each having an end-to-end length and being selectively activatable, and arranged end-to-end in series and parallel to the axis of rotation; (c) at least six temperature sensors for sensing a temperature of the exterior surface at axially spaced apart points; and (d) a controller connected to the at least six heating elements and to the at least six temperature sensors for precisely sensing and controlling the temperature of the exterior surface at each of the axially spaced apart points.

REFERENCES:
patent: 6301454 (2001-10-01), Nishida et al.
patent: 6407366 (2002-06-01), Yoshimura
patent: 6734397 (2004-05-01), Kato et al.
patent: 6862424 (2005-03-01), Matsunaka et al.
patent: 6882804 (2005-04-01), Eskey
patent: 7027749 (2006-04-01), Kamei

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