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US 2013/0094874 A1Published application
Image forming apparatus preventing failure of recording material detachment from conveyance belt
AssigneeCanon Kabushiki Kaisha
InventorJun Mochizuki
Life of this patent
Estimating the term…
Abstract
A method controls the timing of conveying a recording material to a conveyance belt so that a leading edge position of the recording material overlaps with a separation assisting toner image transferred on the conveyance belt in advance to prevent failure of recording material detachment from the conveyance belt.
Claims13
An image forming apparatus comprising:
- a movable image bearing member;
- an image forming unit configured to form a toner image on the image bearing member;
- a movable endless conveyance belt configured to bear and convey a recording material;
- a transfer member configured to transfer a toner image formed on the image bearing member onto a recording material supported by the conveyance belt;
- and
- a control unit configured to control a timing of feeding a recording material to the conveyance belt so that a part of the recording material including at least a leading edge of the recording material overlaps with a toner layer, the toner layer being transferred in advance to the conveyance belt from the image bearing member, and having a charging polarity being the same as that of a toner image transferred from the image bearing member onto the recording material, and having a length such that, when the part of the recording material including at least a leading edge of the recording material overlaps with the toner layer, the other part of the recording material does not overlap with the toner layer.
3 more elements
An image forming apparatus comprising:
- a movable image bearing member;
- an image forming unit configured to form a toner image on the image bearing member;
- a movable endless conveyance belt configured to bear and convey a recording material;
- a transfer member configured to transfer a toner image formed on the image bearing member onto a recording material supported by the conveyance belt;
- a control unit configured to control a timing of feeding a recording material to the conveyance belt so that a part of the recording material including at least a leading edge of the recording material overlaps with a toner layer, the toner layer being transferred in advance to the conveyance belt from the image bearing member, and having a charging polarity being the same as that of a toner image transferred from the image bearing member onto the recording material, and having a length such that, when the part of the recording material including at least a leading edge of the recording material overlaps with the toner layer, the other part of the recording material does not overlap with the toner layer;
- and
- an operation unit configured to enable an operator to select any one of a plurality of modes according to a type of a recording material to be used,
- wherein the control unit forms the toner layer if the operator selects a mode in which a thin recording material is used, and does not form the toner layer if the operator selects a mode in which a thick recording material is used.
5 more elements
Dependencies are inferred from the claim text.