Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsKazushi Suzuki, Chikara Imaizumi
Life of this patent
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Abstract
An image forming apparatus includes a lever configured to move a secondary transfer roller from an endless belt. The lever is arranged between a primary transfer surface of the endless belt, which opposes a plurality of image bearing members between an opposing roller and a stretching roller, and a surface opposing the primary transfer surface. The lever is engaged with the secondary transfer roller to separate the secondary transfer roller from the endless belt. Such a simple contact-separation configuration for the secondary transfer roller achieves reduction in size and space of the image forming apparatus.
Claims17
An image forming apparatus comprising:
- a photosensitive member configured to bear a toner image;
- a transfer unit to which the toner image is primarily transferred from the photosensitive member, and including an endless belt configured to contact the photosensitive member and circularly move, a contact member arranged corresponding to the photosensitive member and configured to contact and be separated from the belt, and a moving member configured to move to cause the contact member to contact and be separated from the belt;
- a secondary transfer member configured to contact and be separated from an outer peripheral surface of the belt to secondarily transfer the toner image from the belt to a transfer material;
- and
- an urging member configured to urge the secondary transfer member toward the transfer unit,
- wherein the moving member includes an acting portion configured to cause the secondary transfer member to move in a direction opposite to an urging direction of the urging member, and a movement of the moving member moves the contact member and the secondary transfer member.
An image forming apparatus, comprising:
- a photosensitive member configured to bear a toner image;
- a transfer unit to which the toner image is primarily transferred from the photosensitive member, and including an endless belt configured to contact the photosensitive member and circularly move, a first stretching roller configured to stretch an inner peripheral surface of the belt, and a second stretching roller configured to stretch the inner peripheral surface of the belt;
- a secondary transfer member configured to contact and be separated from an outer peripheral surface of the belt formed between the first stretching roller and the second stretching roller to secondarily transfer the toner image from the belt to a transfer material;
- and
- an urging member configured to urge the secondary transfer member toward the transfer unit,
- wherein the transfer unit includes a moving member configured to move the secondary transfer member in a direction opposite to an urging direction of the urging member, and the moving member is movable within space formed between a position of a shaft of the first stretching roller and a position of a shaft of the second stretching roller.
Dependencies are inferred from the claim text.