Image forming apparatus with reciprocating mechanism for cleaning blade

摘要

An image forming apparatus includes: an image bearing member; a belt; a cleaning blade; a reciprocating mechanism for reciprocating the cleaning blade in the width direction so that one end portion thereof is between first and second positions and the other end portion thereof is between third and fourth positions; and a brush, extending in the width direction, for removing the toner deposited on the belt in contact with the outer peripheral surface of the belt. The brush is provided upstream of the cleaning blade and downstream of the transfer portion with respect to the movement direction of the belt so that one end portion of the brush is between the first and second positions and the other end portion of the brush is between the third and fourth positions.

主权项

1. An image forming apparatus comprising:
an image bearing member configured to bear a toner image; a movable belt configured to feed a recording material onto which the toner image is to be transferred from said image bearing member at a transfer portion; a cleaning blade, in contact with an outer peripheral surface of said belt and extending in a width direction crossing a movement direction of said belt, configured to remove toner deposited on said belt; a reciprocating mechanism configured to reciprocate said cleaning blade in the width direction so that one end portion thereof is moved in a range from a first position to a second position and another end portion thereof is moved in a range from a third position to a fourth position, wherein in the first position, the one end portion is at an outermost position on one end portion side of said cleaning blade, in the second position, the one end portion is at an innermost position on the one end portion side, in the third position, the other end portion is at an innermost position on another end portion side of said cleaning blade, and in the fourth position, the other end portion is at an outermost position on the other end portion side; and a brush, in contact with the outer peripheral surface of said belt and extending in the width direction, configured to remove the toner deposited on said belt, wherein said brush is provided upstream of said cleaning blade and downstream of the transfer portion with respect to the movement direction of said belt so that one end portion of said brush is disposed between the first and second positions and the other end portion of said brush is disposed between the third and fourth positions.