Konica Minolta Bizhub 501 Service Manual page 80

Theory of Operation Ver.2.0 Mar. 2009
C. Separation mechanism
The separation roller [5] is pressed against the feed roller [8] by the operating pressure generated by the pres-
sure [2] of the spring [4] and the torque of the torque limiter [3]. This operating pressure of the feed roller, sepa-
ration roller and torque limiter becomes a limit torque to prevent the double feed of paper.
When there is no paper between the separation roller and the feed roller, or when only one sheet of paper is con-
veyed, the operating pressure of the feed roller, the paper and the spring is in excess of the limit torque, and
therefore, the separation roller rotates [6] following the rotation of the feed roller. When two or more sheets of
paper are conveyed between the separation roller and the feed roller, the limit torque is greater than the frictional
force between 2 sheets of paper, and accordingly, the separation roller stops and the lower side paper [7] in
contact with the separation roller is not conveyed.
[1] Paper conveyance direction
[2] Pressing
[3] Torque limiter
[4] Spring
[8]
[7] [6]
14. PAPER FEED SECTION (Tray 1/2)
[5]
[5] Separation roller
[6] Driven rotation
[7] 2nd sheet of paper
[8] Feed roller
[1]
[2]
[3]
[4]
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