US 2026/0072389 A1Published application

Sheet conveyance apparatus and image forming apparatus

AssigneeCanon Kabushiki Kaisha

InventorWATARU TAKAHASHI

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Abstract

A sheet conveyance apparatus includes a conveyance rotary member pair, an abutment portion, a first skewing rotary member pair, a switching unit, a driving unit, and a control unit. The switching unit switches the first skewing rotary member pair between a nipping conveyance state in which a sheet is nipped and conveyed and a non-nipping state in which nipping of the sheet is released. The control unit controls a rotational speed of the first skewing rotary member pair to be a first speed when the sheet is obliquely conveyed to the abutment portion by the first skewing rotary member pair, and controls the rotational speed of the first skewing rotary member pair to be a second speed lower than the first speed when the first skewing rotary member pair is in the non-nipping state and the conveyance rotary member pair conveys the sheet.

Claims13

Dependent claims

A sheet conveyance apparatus comprising:

a conveyance rotary member pair configured to nip and convey a sheet;
an abutment portion disposed on one side in a width direction orthogonal to a sheet conveyance direction with respect to the sheet being conveyed;
a first skewing rotary member pair disposed downstream of the conveyance rotary member pair in the sheet conveyance direction and configured to obliquely convey the sheet toward the abutment portion;
a switching unit configured to switch the first skewing rotary member pair between a nipping conveyance state in which the sheet is nipped and conveyed and a non-nipping state in which nipping of the sheet is released;
a driving unit configured to rotationally drive the first skewing rotary member pair;
and
a control unit configured to control the switching unit and the driving unit,
wherein the control unit is configured to
control a rotational speed of the first skewing rotary member pair to be a first speed in a case where the sheet is obliquely conveyed to the abutment portion by the first skewing rotary member pair, and
control the rotational speed of the first skewing rotary member pair to be a second speed lower than the first speed in a case where the first skewing rotary member pair is in the non-nipping state and the conveyance rotary member pair conveys the sheet.

7 more elements

A sheet conveyance apparatus comprising:

an abutment portion disposed on one side in a width direction orthogonal to a sheet conveyance direction with respect to a sheet being conveyed;
a first skewing rotary member pair configured to obliquely convey the sheet toward the abutment portion;
a second skewing rotary member pair configured to obliquely convey the sheet toward the abutment portion;
a first switching mechanism configured to switch the first skewing rotary member pair between a nipping conveyance state in which the sheet is nipped and conveyed and a non-nipping state in which nipping of the sheet is released;
a fourth switching mechanism configured to switch the second skewing rotary member pair between a nipping conveyance state in which the sheet is nipped and conveyed and a non-nipping state in which nipping of the sheet is released;
a first driving unit configured to rotationally drive the first skewing rotary member pair;
a fourth driving unit configured to rotationally drive the second skewing rotary member pair;
and
a control unit configured to control the first switching mechanism, the fourth switching mechanism, the first driving unit, and the fourth driving unit,
wherein the second skewing rotary member pair is disposed such that the first skewing rotary member pair is positioned between the second skewing rotary member pair and the abutment portion in the width direction,
wherein the second skewing rotary member pair is disposed such that an angle between an oblique conveyance direction of the second skewing rotary member pair and the sheet conveyance direction is larger than an angle between an oblique conveyance direction of the first skewing rotary member pair and the sheet conveyance direction, and
wherein the control unit is configured to
control a rotational speed of the first skewing rotary member pair to be a first speed in a case where the second skewing rotary member pair is in the non-nipping state and the sheet is obliquely conveyed to the abutment portion by the first skewing rotary member pair, and
control the rotational speed of the first skewing rotary member pair to be a fourth speed higher than the first speed in a case where the first skewing rotary member pair is in the non-nipping state and the sheet is obliquely conveyed to the first skewing rotary member pair by the second skewing rotary member pair.

11 more elements

A sheet conveyance apparatus comprising:

an abutment portion disposed on one side in a width direction orthogonal to a sheet conveyance direction with respect to a sheet being conveyed;
a first skewing rotary member pair configured to obliquely convey the sheet toward the abutment portion;
a second skewing rotary member pair configured to obliquely convey the sheet toward the abutment portion;
a first switching mechanism configured to switch the first skewing rotary member pair between a nipping conveyance state in which the sheet is nipped and conveyed and a non-nipping state in which nipping of the sheet is released;
a fourth switching mechanism configured to switch the second skewing rotary member pair between a nipping conveyance state in which the sheet is nipped and conveyed and a non-nipping state in which nipping of the sheet is released;
a first driving unit configured to rotationally drive the first skewing rotary member pair;
a fourth driving unit configured to rotationally drive the second skewing rotary member pair;
and
a control unit configured to control the first switching mechanism, the fourth switching mechanism, the first driving unit, and the fourth driving unit,
wherein the second skewing rotary member pair is disposed such that the first skewing rotary member pair is positioned between the second skewing rotary member pair and the abutment portion in the width direction,
wherein the second skewing rotary member pair is disposed such that an angle between an oblique conveyance direction of the second skewing rotary member pair and the sheet conveyance direction is larger than an angle between an oblique conveyance direction of the first skewing rotary member pair and the sheet conveyance direction, and
wherein the control unit is configured to
control a rotational speed of the second skewing rotary member pair to be a fifth speed in a case where the first skewing rotary member pair is in the non-nipping state and the sheet is obliquely conveyed to the first skewing rotary member pair by the second skewing rotary member pair, and
control the rotational speed of the second skewing rotary member pair to be a sixth speed lower than the fifth speed in a case where the second skewing rotary member pair is in the non-nipping state and the sheet is obliquely conveyed to the abutment portion by the first skewing rotary member pair.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/307,214Filed 22 Aug 2025
Priority: JP 2024-15750211 Sep 2024
Published: 12 Mar 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G03G 15/6564
For sheet registration: with correct timing of sheet feeding
G03G 15/6567
Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the…:…
G03G 15/0189
Using more than one reusable electrographic recording member, e.g. one for every monocolour image: primary transfer to an intermediate transfer belt
G03G 2215/00405
The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is…:…