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US 11,345,557 B2Granted
Sheet feeding apparatus
AssigneeCanon Kabushiki Kaisha
InventorAkiyuki Mitamura
Life of this patent
Estimating the term…
Abstract
In a first mode, the control unit controls the driving source such that the rotary feeding member starts to move toward the first position based on an elapse of a first time since the detection portion detected a leading edge of the sheet, and positions the rotary feeding member at the first position when a trailing edge of the sheet passes through the separation nip. In a second mode, the control unit controls the driving source such that the rotary feeding member starts to move toward the first position based on an elapse of a second time longer than the first time since the detection portion detected the leading edge of the sheet, and positions the rotary feeding member at a position separated more from the stacking portion than the first position when the trailing edge of the sheet passes through the separation nip.
Claims20
A sheet feeding apparatus comprising:
- a stacking portion on which a sheet is stacked;
- a rotary feeding member configured to feed the sheet stacked on the stacking portion;
- a rotary conveyance member configured to convey the sheet, fed by the rotary feeding member, in a conveyance direction;
- a rotary separation member configured to form a separation nip together with the rotary conveyance member, and configured to be rotated by rotation of the rotary conveyance member with a predetermined load torque in a case where the sheet is conveyed by the separation nip in the conveyance direction, the separation nip being configured to separate the sheet from another sheet;
- a supporting portion configured to rotatably support the rotary feeding member;
- a driving source configured to drive the supporting portion such that the rotary feeding member moves between a first position and a second position, the first position being a position at which the rotary feeding member abuts against the sheet stacked on the stacking portion, the second position being a position at which the rotary feeding member is separated from the sheet stacked on the stacking portion;
- a detection portion configured to detect the sheet in a position positioned downstream of the separation nip;
- and
- a control unit configured to control the driving source,
- wherein the control unit is configured to execute a first mode and a second mode,
- wherein in the first mode, the control unit is configured to control the driving source such that the rotary feeding member starts to move toward the first position based on an elapse of a first time since the detection portion detected a leading edge of the sheet, and position the rotary feeding member at the first position when a trailing edge of the sheet passes through the separation nip, and
- wherein in the second mode, the control unit is configured to control the driving source such that the rotary feeding member starts to move toward the first position based on an elapse of a second time longer than the first time since the detection portion detected the leading edge of the sheet, and position the rotary feeding member at a position separated more from the stacking portion than the first position when the trailing edge of the sheet passes through the separation nip.
9 more elements
A sheet feeding apparatus comprising:
- a stacking portion on which a sheet is stacked;
- a rotary feeding member configured to feed the sheet stacked on the stacking portion;
- a rotary conveyance member configured to convey the sheet, fed by the rotary feeding member, in a conveyance direction;
- a rotary separation member configured to form a separation nip together with the rotary conveyance member, and configured to be rotated by rotation of the rotary conveyance member with a predetermined load torque in a case where the sheet is conveyed by the separation nip in the conveyance direction, the separation nip being configured to separate the sheet from another sheet;
- a supporting portion configured to rotatably support the rotary feeding member;
- a driving source configured to drive the supporting portion such that the rotary feeding member moves between a first position and a second position, the first position being a position at which the rotary feeding member abuts against the sheet stacked on the stacking portion, the second position being a position at which the rotary feeding member is separated from the sheet stacked on the stacking portion;
- a detection portion configured to detect the sheet in a position positioned downstream of the separation nip;
- and
- a control unit configured to control the driving source,
- wherein the control unit is configured to execute a third mode and a fourth mode,
- wherein in the third mode, the control unit is configured to control the driving source such that the rotary feeding member is positioned at the first position in a period of time from when the rotary feeding member starts to feed the sheet until when a trailing edge of the sheet passes through the separation nip, and position the rotary feeding member at the first position when the trailing edge of the sheet passes through the separation nip, and
- wherein in the fourth mode, the control unit is configured to control the driving source such that the rotary feeding member starts to move toward the second position based on an elapse of a third time since the detection portion detected a leading edge of the sheet, control the driving source such that the rotary feeding member starts to move toward the first position based on an elapse of a fourth time longer than the third time since the detection portion detected the leading edge of the sheet, and position the rotary feeding member at a position separated more from the stacking portion than the first position when the trailing edge of the sheet passes through the separation nip.
9 more elements
Dependencies are inferred from the claim text.