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US 2009/0154964 A1Published application
Image processing apparatus and method
AssigneeCanon Kabushiki Kaisha
InventorTakaaki Tsuruya
Life of this patent
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Abstract
An image forming apparatus controls the conveyance speed of a transfer material at the time a leading edge of the transfer material enters a transfer nip, to be slower than the moving speed of an image bearing member. Furthermore, the image forming apparatus controls the conveyance speed of the transfer material at the time a trailing edge of the transfer material exits the transfer nip, to be faster than the moving speed of the image bearing member.
Claims21
An image forming apparatus comprising:
- an image bearing member configured to bear a toner image and move;
- a transfer member configured to form a nip with the image bearing member and move;
- and
- a control device configured to control a moving speed of the transfer member, wherein
- a transfer material is conveyed through the nip and the toner image on the image bearing member is transferred on the transfer material,
- wherein the image forming apparatus has a marginless mode in which the toner image is formed on said image bearing member in an area that covers the transfer material and an area outside the transfer material, and the toner image is transferred to extend beyond an edge of the transfer material, and
- wherein at least at a time of transferring the toner image onto a leading edge of the transfer material in a transfer material conveyance direction in the marginless mode, the control device controls the moving speed of the transfer member so that a conveyance speed of the transfer material at a time of entering the nip becomes slower than the moving speed of the image bearing member.
4 more elements
An image forming apparatus comprising:
- an image bearing member configured to bear a toner image and move;
- a transfer member configured to form a nip with the image bearing member and move;
- and
- a control device configured to control a moving speed of the transfer member, wherein
- a transfer material is conveyed through the nip and the toner image on the image bearing member is transferred on the transfer material,
- wherein the image forming apparatus has a marginless mode in which the toner image is formed on said image bearing member in an area that covers the transfer material and an area outside the transfer material, and the toner image is transferred to extend beyond an edge of the transfer material, and
- wherein at least at a time of transferring the toner image onto a trailing edge of the transfer material in a transfer material conveyance direction in the marginless mode, the control device controls the moving speed of the transfer member so that a conveyance speed of the transfer material at a time of exiting the nip becomes faster than the moving speed of the image bearing member.
4 more elements
An image forming apparatus comprising:
- an image bearing member configured to bear a toner image and move;
- a transfer member configured to form a nip with the image bearing member and move;
- and
- a control device configured to control a moving speed of the transfer member, wherein
- a transfer material is conveyed through the nip and the toner image on the image bearing member is transferred on the transfer material,
- wherein the image forming apparatus has a marginless mode in which the toner image is formed on said image bearing member in an area that covers the transfer material and an area outside the transfer material, and the toner image is transferred to extend beyond an edge of the transfer material, and
- wherein at least at a time of transferring the toner image onto both a leading edge and a trailing edge of the transfer material in a transfer material conveyance direction in the marginless mode, the control device controls the moving speed of the transfer member so that a conveyance speed of the transfer material at a time of entering the nip becomes slower than the moving speed of the image bearing member and that the conveyance speed of the transfer material at the time of exiting the nip becomes faster than the moving speed of the image bearing member.
4 more elements
Dependencies are inferred from the claim text.