Specifications

21-4. 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 each of
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 reached
when the Pressure Adjusting Screws are fully tightened. (To release the
Lower Fusing Roller, therefore, you have only to loosen these screws.)
•
As the screws are tightened [arrow
➀
], the Pivot Plates are moved in the
direction of arrow
➁
, pulling the Pressure Springs. Then, the Pressure
Holders are moved in the direction of arrow
➂
, thus pressing the Lower
Fusing Roller up [arrow
➃
] against the Upper Fusing Roller. (The
mechanisms are identical in the rear.)
* The illustration shows the
unit viewed from the front
of the copier.
Upper Fusing Roller
Lower Fusing Roller
Pressure Holder
Pressure Spring
Pivot Plate
Pressure Adjusting
Screw
21-5. Oil Application Mechanism
•
The silicone oil is applied to the surface of the Upper Fusing Roller when
the Cleaning 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.
M-169