Canon NP7161 B. Controlling the Fixing Temperature

CHAPTER 6 FIXING SYSTEM
6–2
COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
B. Controlling the Fixing Temperature
The copier uses two thermistors mounted at the rear ends of the upper roller to monitor
surface temperature. When copies are made continuously using sheets of B4 or less, the
temperature of the area (center) coming into contact with the paper will be lower than the
temperature of the areas (ends) not coming into contact with the paper. To prevent such a
problem, the target temperature is varied in steps to suit the width of copy paper and the
temperature detected by the thermistor during copying operation.
To improve fixing on rough surface paper or tracing paper, a special paper mode (U13) has
been added to user mode, thereby enabling a target temperature unique to these types of paper.
• Paper Width >257 mm
Table 6-101
• 257 mm > Paper Width > 216 mm
Table 6-102
• 216 mm > Paper Width > 182 mm
Table 6-103
Temperature detected by
thermistor at Start key on
Target temperature immediately
after Start key on Target temperature during continuous copying (upper limit)
Less than 170°C
170°C or more, less than 180°C
180°C or more, less than 190°C
190°C or more
179°C
188°C
193°C
193°C
196°C
201°C
206°C
211°C
169°C
178°C
183°C
183°C
193°C 211°C 183°C
General plain paper Paper with rough surface Tracing paper General plain paper
Paper with rough surface Tracing paper
Temperature detected by
thermistor at Start key on
Target temperature immediately
after Start key on Target temperature during continuous copying (upper limit)
Less than 170°C
170°C or more, less than 180°C
180°C or more, less than 190°C
190°C or more
171°C
181°C
181°C
181°C
196°C
200°C
206°C
209°C
161°C
171°C
171°C
171°C
181°C 209°C 171°C
General plain paper Paper with rough surface Tracing paper General plain paper
Paper with rough surface Tracing paper
Temperature detected by
thermistor at Start key on
Target temperature immediately
after Start key on Target temperature during continuous copying (upper limit)
Less than 170°C
170°C or more, less than 180°C
180°C or more, less than 190°C
190°C or more
177°C
186°C
192°C
200°C
196°C
202°C
207°C
214°C
167°C
176°C
182°C
190°C
200°C 214°C 190°C
General plain paper Paper with rough surface Tracing paper General plain paper
Paper with rough surface Tracing paper