Image forming apparatus

摘要

An image forming apparatus includes a developing unit configured to develop using toner an electrostatic latent image formed on a photosensitive member, a mounting unit to which a container is mounted, the container including a containing unit configured to contain toner and a pump unit, and performing a supplying operation for supplying toner by expansion and contraction of the pump unit, a driving unit configured to rotationally drive the container to cause the container to perform the supplying operation, and a controller configured to control a rotational speed of the container based on a time for which the supplying operation has been performed.

主权项

1. An image forming apparatus comprising:
a photosensitive member; an exposure unit configured to expose the photosensitive member to form an electrostatic latent image on the photosensitive member; a developing unit configured to develop using toner the electrostatic latent image formed on the photosensitive member by the exposure unit; a container including a containing unit configured to contain toner and a pump unit configured to change internal pressure of the containing unit, wherein, the pump unit in the container expands and contracts according to rotation of the container, and the container supplies toner from the containing unit to the developing unit, a driving unit configured to rotate the container; a detection unit configured to detect a predetermined portion of the rotating container; and a controller configured to control the driving unit so that a rotational speed of the container becomes a predetermined speed, based on a detection result of the detection unit, wherein, in a case where toner is to be supplied from the container to the developing unit, the container changes from a first state in which the pump unit has contracted to a second state in which the pump unit has expanded, and changes from the second state to the first state, and wherein, the controller stops the driving unit in response to the detection unit detecting a trailing edge area included in the predetermined portion.