Fig. 4-87 Upper And Lower Rollers - Canon NP-70 Service Manual

4-74
NP -70
1) SEPARATION ROLLER
The separation roller rotates simultaneously with the drum but in the opposite direction. It
conveys copying paper, separated by the Paper Separating Subassembly, to the Heater Assembly.
The separation roller is made up of 12 roller sections on a shaft, the first one from the front
end being a rubber roller which comes into contact with the separation belt. (Refer to Chapter
2 for details on drive of this separation roller.)
2) DELIVERY ROLLERS 1 & 2
After undergoing the "fixing" process by the Heater Assembly, the copying paper is passed
between one set of rollers, called delivery roller 1, and then another set, called delivery roller
2, for delivery into the copy tray. At the same time, any residual charge is removed from
copies by an AC corona called the residual charge eliminator.
a) Delivery Roller 1
Delivery roller 1 is composed of a main roller and an auxiliary roller positioned directly
above. The lower roller is made up of 4 rubber rollers on a shaft, and the upper roller is
composed of 4 plastic rollers, also, on a shaft. The auxiliary roller is pressed against the
lower roller by springs, which exert a downward pressure on the shaft.
Spring
Upper Roller
Lower Ro er
Delivery Sprocket 1
Fig. 4-87 Upper and Lower Rollers
b) Delivery Roller 2
Delivery roller 2 is identical to delivery roller 1 except that 4 steel rollers, rather than
rubber ones, are fitted on its shaft. Its upper roller is the same as that of delivery roller 1.
Second Printing-June, 1974
© CANON INC.