Abstract: A static elimination apparatus includes a conveyance unit configured to convey a sheet along a conveyance path, a non-contact static elimination unit arranged above the conveyance path and configured to eliminate static electricity from the sheet in a non-contact state, an upper side guide member arranged to face an upper surface of the sheet and configured to form part of the conveyance path, a lower side guide member arranged to face a lower surface of the sheet and configured to form the conveyance path together with the upper side guide member, a lower side unit in which the lower side guide member is arranged, and an upper side unit in which the non-contact static elimination unit is arranged and that is configured to be rotated upward with respect to the lower side unit to make at least part of the conveyance path exposed.

Abstract: A charge eliminating apparatus configured to remove charges from a sheet on which an image is formed by a printing apparatus, includes a charge eliminating roller pair including a first charge eliminating roller and a second charge eliminating roller configured to form a nip portion together with the first charge eliminating roller, the charge eliminating roller pair being configured to remove the charges from the sheet in a state of contacting the sheet at the nip portion, a first setting unit configured to set a value of a voltage applied to the charge eliminating roller pair, and a second setting unit configured to set whether to apply the voltage to the charge eliminating roller pair, wherein the second setting unit is configured to set whether to apply the voltage to the charge eliminating roller pair without changing the value of the voltage set by the first setting unit.

Abstract: A static elimination apparatus includes a conveyance unit to convey a sheet along a conveyance path, a non-contact static elimination unit to eliminate static from the sheet, a first guide member including a contact portion to guide the sheet, and a plurality of openings arranged next to each other in a width direction. The plurality of openings expose the non-contact static elimination unit to a conveyance path. The contact portion includes a plurality of first ribs arranged on one side with respect to a conveyance center, and a plurality of second ribs arranged on the other side with respect to the conveyance center. The plurality of first ribs and the plurality of second ribs are inclined relative to the sheet conveyance direction so that the further downstream in the sheet conveyance direction each rib is, the greater a distance between each rib and the conveyance center is.

Abstract: An image forming apparatus includes an image forming unit configured to form an image on a sheet, a reversing unit configured to convey a sheet conveyed from the image forming unit in a first direction, stop the conveyance, and then convey the sheet in a second direction, which is opposite to the first direction, an image detection unit disposed to detect at least a portion of the image on the sheet stopped by the reversing unit, and a control unit configured to control the reversing unit and the image detection unit. The control unit is configured to detect the image on the sheet by the image detection unit while the sheet conveyance is stopped by the reversing unit.

Abstract: A static elimination apparatus includes a conveyance unit configured to convey a sheet along a conveyance path, a non-contact static elimination unit arranged above the conveyance path and configured to eliminate static electricity from the sheet in a non-contact state, an upper side guide member arranged to face an upper surface of the sheet and configured to form part of the conveyance path, a lower side guide member arranged to face a lower surface of the sheet and configured to form the conveyance path together with the upper side guide member, a lower side unit in which the lower side guide member is arranged, and an upper side unit in which the non-contact static elimination unit is arranged and that is configured to be rotated upward with respect to the lower side unit to make at least part of the conveyance path exposed.

Abstract: A charge eliminating apparatus includes a conveyance path configured to convey a sheet with an image formed thereon by an image forming apparatus, a non-contact charge eliminating device having an ion generation unit configured to generate ions and a control unit configured to control the ion generation unit, the non-contact charge eliminating device being configured to remove charges from the sheet conveyed in the conveyance path in a non-contact state, a surrounding member configured to surround the control unit, a separating portion configured to separate a first space where the control unit is surrounded by the surrounding member and a second space where the ion generation unit is disposed, and a fan configured to generate an air flow in the first space.

Abstract: A charge eliminating apparatus configured to remove charges from a sheet on which an image is formed by a printing apparatus, includes a charge eliminating roller pair including a first charge eliminating roller and a second charge eliminating roller configured to form a nip portion together with the first charge eliminating roller, the charge eliminating roller pair being configured to remove the charges from the sheet in a state of contacting the sheet at the nip portion, a first setting unit configured to set a value of a voltage applied to the charge eliminating roller pair, and a second setting unit configured to set whether to apply the voltage to the charge eliminating roller pair, wherein the second setting unit is configured to set whether to apply the voltage to the charge eliminating roller pair without changing the value of the voltage set by the first setting unit.

Abstract: A static elimination apparatus includes a conveyance unit to convey a sheet along a conveyance path, a non-contact static elimination unit to eliminate static from the sheet, a first guide member including a contact portion to guide the sheet, and a plurality of openings arranged next to each other in a width direction. The plurality of openings expose the non-contact static elimination unit to a conveyance path. The contact portion includes a plurality of first ribs arranged on one side with respect to a conveyance center, and a plurality of second ribs arranged on the other side with respect to the conveyance center. The plurality of first ribs and the plurality of second ribs are inclined relative to the sheet conveyance direction so that the further downstream in the sheet conveyance direction each rib is, the greater a distance between each rib and the conveyance center is.

Abstract: A static elimination apparatus includes a conveyance unit to convey a sheet along a conveyance path, a non-contact type static elimination unit to perform static elimination on the sheet without being in contact with the sheet, and first and second guide members. The first guide member includes a contact portion to guide the sheet and a plurality of openings arranged in a sheet widthwise direction perpendicular to a sheet conveyance direction to expose the non-contact type static elimination unit to the conveyance path. The second guide member is disposed to face the first guide member and forms a part of the conveyance path together with the first guide member. The contact portion includes an inclined portion upstream in the sheet conveyance direction. The inclined portion is inclined so that a distance to the second guide member decreases downstream in the sheet conveyance direction.

Abstract: A sheet feeding device includes a feeding roller pair, a detecting portion, a first changing portion, a second changing portion, and a controller for controlling the first changing portion and the second changing portion. The controller starts a first feeding operation for feeding a sheet toward the obliquely feeding roller pair in a nipping state of the feeding roller pair and then starts a second feeding operation for feeding the sheet for abutting a side end of the sheet against the reference member in the nipping state of the obliquely feeding roller pair. The controller changes, after the first feeding operation is started and before the second feeding operation is started, a start timing of the second feeding operation on the basis of a detection result of a position of the side end of the sheet detected by the detecting portion.

Abstract: An image forming apparatus includes an image forming portion, a tray rotatably provided on a side surface of a main assembly and including a stacking surface, a feeding portion; and a blowing fan mounted on the tray and generating air blown to a side end of a sheet in a sheet widthwise direction perpendicular to a feeding direction of the sheet by the feeding portion. The blowing fan is disposed on an opposite side to a side where the sheet is stacked on the stacking surface so that a position of at least a part of the blowing fan with respect to the sheet widthwise direction is overlapped with a position of the stacking surface with respect to the sheet widthwise direction.

Abstract: A sheet feeding apparatus includes a sheet supporting portion, a sheet feed portion, an air separation unit, and a control unit. The sheet supporting portion supports a sheet bundle. The sheet feed portion performs a sheet feeding operation by abutting against an uppermost sheet of the sheet bundle supported on the sheet supporting portion and feeding the uppermost sheet. The air separation unit performs an air blowing operation of blowing air to a side face of the sheet bundle supported on the sheet supporting portion and separating sheets. The control unit executes a mode of performing the air blowing operation by the air separation unit, stopping the air blowing operation, and then performing the sheet feeding operation by the sheet feed portion in a state where the air blowing operation is stopped.

Abstract: An image forming apparatus includes an image forming unit configured to form an image on a sheet, a reversing unit configured to convey a sheet conveyed from the image forming unit in a first direction, stop the conveyance, and then convey the sheet in a second direction, which is opposite to the first direction, an image detection unit disposed to detect at least a portion of the image on the sheet stopped by the reversing unit, and a control unit configured to control the reversing unit and the image detection unit. The control unit is configured to detect the image on the sheet by the image detection unit while the sheet conveyance is stopped by the reversing unit.

Abstract: A sheet conveyance apparatus includes a conveyance roller, an abutment member including an abutment surface, an obliquely conveying roller configured to convey the sheet such that the side edge portion is moved toward the abutment surface, a sheet side-edge detection portion, and a controller. The controller is configured to control the conveyance force of the obliquely conveying roller at a first conveyance force until a predetermined time has elapsed, in an abutment operation in which the sheet is abutted against the abutment surface by the obliquely conveying roller, and control the conveyance force of the obliquely conveying roller at a second conveyance force larger than the first conveyance force if the predetermined time has elapsed and the position of the side edge portion of the sheet detected by the sheet side-edge detection portion is out of a predetermined range.

Abstract: A sheet conveyance apparatus includes a conveyance guide configured to guide a sheet along a conveyance center line extending in a conveyance direction, a reference member including an abutment surface, a conveyance unit configured to convey the sheet while abutting a first edge of the sheet against the abutment surface, a detection unit configured to detect a first angle formed between the first edge of the sheet and a second edge adjacent to the first edge, a moving unit configured to move the reference member so as to change a second angle formed between the abutment surface and the conveyance center line, and a control unit configured to perform a movement process in which the moving unit moves the reference member such that, when the first angle is referred to as ?, the second angle becomes an absolute value of a difference 90 degrees minus ?.

Abstract: A sheet conveying apparatus including: a pair of inlet rollers; a pair of outlet rollers; a pair of movable rollers disposed between the inlet rollers and the outlet rollers; a moving unit configured to move the movable rollers; a pair of upstream rollers disposed between the inlet rollers and the movable rollers; a pair of downstream rollers disposed between the movable rollers and the outlet rollers; a first conveyance belt passed over a first inlet roller, a first outlet roller, a first movable roller, a first upstream roller, and a first downstream roller; and a second conveyance belt passed over a second inlet roller, a second outlet roller, a second movable roller, a second upstream roller, and a second downstream roller. A diameter of the pair of upstream rollers and a diameter of the pair of downstream rollers are smaller than a diameter of the pair of movable rollers.

Abstract: A sheet feeding device includes a feeding roller pair, a detecting portion, a first changing portion, a second changing portion, and a controller for controlling the first changing portion and the second changing portion. The controller starts a first feeding operation for feeding a sheet toward the obliquely feeding roller pair in a nipping state of the feeding roller pair and then starts a second feeding operation for feeding the sheet for abutting a side end of the sheet against the reference member in the nipping state of the obliquely feeding roller pair. The controller changes, after the first feeding operation is started and before the second feeding operation is started, a start timing of the second feeding operation on the basis of a detection result of a position of the side end of the sheet detected by the detecting portion.

Abstract: A sheet conveyance apparatus includes a conveyance roller, an abutment member including an abutment surface against which a side edge, in a width direction, of the sheet abuts, and configured to correct a skew of the sheet, an obliquely conveying roller configured to convey the sheet such as the side edge of the sheet is conveyed toward the abutment surface, a sheet side edge detection portion configured to detect a position of the side edge of the sheet, and a control unit configured to control that a conveyance force, in the width direction, by the obliquely conveying roller in response to a detection result of the sheet side edge detection portion becomes smaller than that in an abutment movement.

Abstract: A sheet conveyance apparatus includes a first conveyance unit conveying a sheet, the first conveyance unit including a first rotary member, and a second rotary member contacting with the first rotary member at a contact portion, a second conveyance unit arranged downstream, in a sheet conveyance direction, of the first conveyance unit, a bent conveyance guide forming a sheet conveying path between the first conveyance unit and the second conveyance unit such that the sheet conveying path is bent, and a swing guide provided upstream, in the sheet conveyance direction, of the bent conveyance guide, and guiding the sheet to the bent conveyance guide at a downstream side, in the sheet conveyance direction, of the contact portion. A center of rotation of the swing guide is provided coaxially as a rotation axis of the first rotary member.

Abstract: A sheet conveyance apparatus includes a first conveyance unit conveying a sheet, the first conveyance unit including a first rotary member, and a second rotary member contacting with the first rotary member at a contact portion, a second conveyance unit arranged downstream, in a sheet conveyance direction, of the first conveyance unit, a bent conveyance guide forming a sheet conveying path between the first conveyance unit and the second conveyance unit such that the sheet conveying path is bent, and a swing guide provided upstream, in the sheet conveyance direction, of the bent conveyance guide, and guiding the sheet to the bent conveyance guide at a downstream side, in the sheet conveyance direction, of the contact portion. A center of rotation of the swing guide is provided coaxially as a rotation axis of the first rotary member.