Image forming apparatus
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United States of America Patent
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Jun 16, 2015
Grant Date -
Sep 25, 2014
app pub date -
Mar 21, 2014
filing date -
Mar 22, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An image forming apparatus includes a belt unit detachable from a main body, a sensor unit, a blocking member, a moving mechanism, and a determination portion. The sensor unit includes a light emitting element configured to emit an outgoing light toward the belt, a first light receiving element configured to output a first signal, and a second light receiving element. The blocking member includes a first window and a second window. The moving mechanism is configured to move the blocking member between a first position in which the outgoing light passes the first window and a second position in which the outgoing light passes through the second window. The determination portion is configured to, when the blocking member is in the second position, determine whether the belt unit is attached to the main body based on the first signal output from the first light receiving element.
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