Ricoh K-C3.5L Service Training page 107

Offset when Making Many Copies on
Target fusing temperature lowered by 10°C
Target fusing temperature lowered by another
5°C
Slide 107
More on Offset when Making Copies
If narrow paper is fed through the fusing unit continuously, the temperature at the
ends of the rollers becomes higher than at the center.
This is because paper is not drawing heat away from the ends.
Then, if a wider paper is used soon after, the higher temperature could cause
offset to appear at the sides of the copy.
This is very likely when making several copies of an original with many
pages using the rotation sort feature (sets of copies are made with SEF and
LEF paper alternately – the ends of the rollers heat up when making a copy
on SEF paper, then offset will appear when making the next set on LEF
paper).
The machine deals with this as explained on the slide.
However, note that if A6 is detected, the temperature increases 10°C as
explained earlier (Thick paper from the By-pass Tray).
Narrow Paper
If the smallest copy paper width detected during a
40-second interval is less than 220 mm.
If, during the next 80 seconds, the smallest width
detected is again less than 220 mm.
107
Model K-C3.5L