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US 8,626,014 B2Granted
Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorYutaka Kakehi
Life of this patent
Estimating the term…
Abstract
In an image forming apparatus that separates a thin recording material by pushing up a transfer belt, if a position where a thick recording material separates from the transfer belt is far from a leading end of a recording-material guide, conveyability of the separated thick recording material after separation becomes stable. A stretching member is provided downstream of a push-up means and upstream of the recording-material guide in a recording-material conveying direction, and the stretching member separates a thick recording material from the transfer belt.
Claims12
An image forming apparatus comprising:
- an image bearing member configured to bear a toner image;
- a movable belt member configured to bear and convey a recording material;
- a transfer member configured to electrostatically transfer the toner image formed on the image bearing member onto the recording material born and conveyed by the belt member;
- a push-up member having a plurality of protrusions in a width direction of the belt member and configured to push up, from an inner side, the belt member downstream of the transfer member in a conveying direction of the recording material so that the plurality of protrusions forms a plurality of protruded portions on the belt member in a thickness direction of the belt member;
- an execution portion configured to execute a first mode in which the plurality of protrusions of the push-up member forms a plurality of protruded portions in a width direction of the belt member by pushing up the belt member and a second mode in which the plurality of protrusions of the push-up member is separated from the belt member;
- a control portion configured to execute the first mode in case that a recording material having a first stiffness is conveyed by the belt member, and to execute the second mode in case that a recording material having a second stiffness larger than the first stiffness is conveyed by the belt member.
3 more elements
An image forming apparatus comprising:
- an image bearing member configured to bear a toner image;
- a movable belt member configured to bear and convey a recording material;
- a transfer member configured to electrostatically transfer the toner image formed on the image bearing member onto the recording material born and conveyed by the belt member;
- a push-up member having a plurality of protrusions in a width direction of the belt member and configured to push up, from an inner side, the belt member downstream of the transfer member in a conveying direction of the recording material so that the plurality of protrusions forms a plurality of protruded portions on the belt member in a thickness direction of the belt member;
- an execution portion configured to execute a first mode in which the plurality of protrusions of the push-up member forms a plurality of protruded portions in a width direction of the belt member by pushing up the belt member and a second mode in which the plurality of protrusions of the push-up member is separated from the belt member;
- a control portion configured to execute the first mode in case that a recording material having a first thickness is conveyed by the belt member, and to execute the second mode in case that a recording material having a second thickness larger than the first thickness is conveyed by the belt member.
3 more elements
An image forming apparatus comprising:
- an image bearing member configured to bear a toner image;
- a movable belt member configured to bear and convey a recording material;
- a transfer member configured to electrostatically transfer the toner image formed on the image bearing member onto the recording material born and conveyed by the belt member;
- a push-up member having a plurality of protrusions in a width direction of the belt member and configured to push up, from an inner side, the belt member downstream of the transfer member in a conveying direction of the recording material so that the plurality of protrusions forms a plurality of protruded portions on the belt member in a thickness direction of the belt member;
- an execution portion configured to execute a first mode in which the plurality of protrusions of the push-up member forms a plurality of protruded portions in a width direction of the belt member by pushing up the belt member and a second mode in which the plurality of protrusions of the push-up member is separated from the belt member;
- a control portion configured to execute the first mode in case that a recording material having a first basis weight is conveyed by the belt member, and to execute the second mode in case that a recording material having a second basis weight larger than the first basis weight is conveyed by the belt member.
3 more elements
Dependencies are inferred from the claim text.