Minolta Di620, Manual, Page: 135 / 466

M-116
1155SBM1802A
18-2. Fusing Rollers Pressure Mechanism
●
To ensure that there is a certain width of area of contact between the Upper and
Lower Fusing Rollers, a pressure spring is installed to the front and rear Pressure
Holders.
●
The Lower Fusing Roller is held pressed against the Upper Fusing Roller at all
times. It is released only when servicing the copier. Pressure can be adjusted with
the Pressure Adjusting Screws at the front and rear. (The copier is shipped with the
Lower Fusing Roller released from the Upper Fusing Roller.)
●
The pressure between the two rollers is approx. 100 kg which is reached when the
Pressure Adjusting Screws are fully tightened.
1155SBM1803A
18-3. Oil Application Mechanism
●
The silicone oil is applied to the surface of the Upper Fusing Roller when the Clean-
ing Web being fed off the Web Roller is pressed tightly up against the Upper Fusing
Roller by the Oil Supply/Web Feeding Roller. The surface of the Upper Fusing
Roller is cleaned at the same time when silicone oil is applied to it.
●
The silicone oil is then transferred onto the Lower Fusing Roller. The oil prevents
copies having offsets from being produced and helps the paper be stripped off the
surface of the Upper or Lower Fusing Roller.
● The Oil Supply/Web Feeding Roller is made of foam rubber and is thus elastic. This
provides a wider width of area of contact between this roller and the Upper Fusing
Roller, enhancing cleaning and oil application efficiency. This roller also functions to
feed the Cleaning Web as it is being taken up by the Web Take-Up Roller.
Upper Fusing Roller
Pivot
Lower Fusing Roller
Pressure Spring
Pressure Holder
1140M054