Canon Kabushiki Kaisha

Noriaki Koyanagi

Yasumi Yoshida

Takashi Fujita

Yuki Inoue

Youichi Chikugo

Masahiko Yashiro

Kazuo Shishido

Kazunari Hatazaki

Hiroyoshi Maruyama

Takeshi Suga

Minoru Nada

Hiroshi Kokubo

Tamotsu Okada

Hisao Nakajima

Kazuhiro Saitou

Hiroaki Takezawa

Takafumi Monte

A sheet feeding device includes a reversing roller, a guide member and a rotatable member. The guide member includes a curved portion to curve inside a first surface of the sheet and guides the sheet along the curved portion in contact with a second surface opposite to the first surface of the sheet in a first direction. The rotatable member disposed opposed to a sheet guide surface in the curved portion with a gap and is rotated by contacting with the first surface of the sheet. When the sheet is fed by the reversing roller in a second direction, the rotatable member is rotated by contact of the first surface of the sheet with the rotatable member.

Sheet feeding device and an image forming apparatus with a sheet feeding device

An image forming apparatus includes an image forming portion, a reversing portion configured to reverse the sheet received through a first feeding passage by feeding the sheet in a first direction and then in a second direction opposite to the first direction, a sheet feeding portion provided in a second feeding passage branching from the first feeding passage on a side upstream of the reversing portion with respect to the first direction, a first guiding surface forming the second feeding passage for guiding a first surface of the sheet fed by the feeding portion, and a second guiding surface for guiding a second surface, opposite from the first surface, of the sheet fed from the reversing portion in the second direction. The second guiding surface is movable with movement of the first guiding surface for opening the second feeding passage.

Image forming apparatus

A recording material cooling deviceincludes a rotating endless first beltand an endless second beltwhich forms a cooling nip Twith the first beltand which nips and feeds the recording material in the cooling nip Tthrough rotation. A heat sinkfor cooling the first beltor the second beltis provided. On the second beltside, a belt cleaning deviceis provided. The belt cleaning devicecontacts the second beltand removes a deposited matter such as toner and a wax deposited on the second belt. The belt cleaning device is capable of removing the deposited matter deposited on the belt nipping and feeding the recording material for cooling the recording material.

Cooling device, image forming apparatus and image forming system

An external cooling deviceis connectable to an image forming apparatus. The external cooling deviceimproves cooling power of a recording material S after toner image fixation. In this case, even when a heating amount of the fixing deviceis increased, a temperature of the recording material S stacked on a stacking unitcan be lowered to not more than a predetermined temperature at which sticking does not occur. Further, the number of sheets stackable on said stacking unitcan be increased. By this, a user is capable of adjusting glossiness without concern for the sticking of the recording materials S on the stacking unit. Further, the user is not required to frequently carry out the recording material S of the stacking unit. That is, it is possible to provide an image forming systemX capable of flexibly meeting the recording materials S of various kinds.

Cooling device and image forming system

A second sheet discharge portion is provided above a first sheet discharge portion in an image forming apparatus. First and second sheet processing units process a sheet discharged from the first sheet discharge portion, and the second sheet processing unit is provided between the first sheet discharge portion and the first sheet processing unit. A first support portion is provided on the first sheet processing unit. A second support portion is disposed upstream of the first support portion in a sheet discharge direction of the second sheet discharge portion and on or above the second sheet processing unit and supports the sheet discharged from the second sheet discharge portion in collaboration with the first support portion.

Image forming apparatus and sheet processing apparatus

An image forming apparatus includes an apparatus body, an opening/closing portion, and a light emitting element. The apparatus body includes an image forming unit configured to form an image on a sheet. the light emitted by the light emitting element is visible from an exterior surface of the opening/closing portion in a state where the opening/closing portion is at the closed position and is visible from an opposite side, with respect to the exterior surface, of the opening/closing portion in a state where the opening/closing portion is at the open position.

A sheet conveying apparatus of the present invention includes an apparatus body, a conveyance unit which is movably supported by the apparatus body toward an outside of the apparatus body, and includes a sheet conveying path, a conveying guide which forms the sheet conveying path, and is rotatably supported on the conveyance unit wherein in a state that the conveyance unit moves to the outside, the conveying guide can be held in an opening position where the sheet conveying path is opened, and an interlock portion which causes a closure of the conveying guide held in the opening position through interlocking with an operation of mounting the conveyance unit in the apparatus body.

Sheet conveying apparatus and image forming apparatus

A curl correction apparatus includes a supporting member. The supporting member supports a shaft of an elastic roller and a shaft of a metal roller at a first position, and supports only one of the shaft of the elastic roller and the shaft of the metal roller at a second position. When the supporting member is located at the second position, the nip between the elastic roller and the metal roller can be opened by moving the other of the elastic roller and the metal roller.

Sheet conveyance apparatus and image forming apparatus

An image forming apparatus includes a main assembly, a rotatable unit, a first gear, provided in one of the rotatable unit and the main assembly, including a gear portion at an arcuate portion having a center substantially aligned with a rotation center of the rotatable unit, and a second gear, provided rotatably in another one of the rotatable unit and the main assembly, engageable with the first gear in a first rotation region of the rotatable unit. In addition, a third gear is provided at a position different from the second gear with respect to a circumferential direction of the arcuate portion and is engageable with the first gear when the rotatable unit is rotated in a second rotation region thereof. A damper mechanism imparts rotational resistance to the second and third gears when each of the second and third gears is rotated.

A reverse conveying apparatus which again conveys a sheet formed an image by an image forming portion to the image forming portion includes a plurality of roller grippers which supports a sheet formed an image, and a belt which moves the roller grippers to a receiving position where a sheet is received and a carry-out position where a supported sheet is conveyed out. When a sheet is conveyed out in the carry-out position, the sheet is conveyed out such that a rear end thereof when it is received at the receiving position is a leading end.

A sheet conveying path is constituted by a fixed guide portion and a movable guide portion movable in a width direction orthogonal to the conveyance direction of a sheet for regulating the position of one side edge of the sheet by a skew feed correcting portion, and an auxiliary guide for guiding the sheet is provided between the fixed guide portion and the movable guide portion for movement in the width direction. When the skew feed of the conveyed sheet is corrected, the movable guide portion is moved in advance to a position corresponding to the size of the sheet, and in operative association with the movable guide portion, the auxiliary guide is moved to a guide position corresponding to the size of the sheet.

To provide a sheet conveying apparatus capable of enhancing an accuracy of correcting a skew of a sheet, and of preventing position shift of a sheet. The present invention provides a sheet conveying apparatus for conveying a sheet by a sheet conveying unit disposed along a sheet conveying path, including: a skew detection sensor for detecting a skew of the sheet with respect to a sheet conveying direction by a plurality of detection sensors disposed in a direction intersecting perpendicularly the sheet conveying direction; and a skew correction roller adapted to be pivotally moved in a direction of correction of a skew of the sheet in a state with the skewed sheet being held on the basis of a detection signal from the skew detection sensor, in which one of the plurality of detection sensors of the skew detection sensor is disposed nearly on an extension line from a pivotal movement center of the skew correction roller in the sheet conveying direction.

Pivotal sheet conveying apparatus for skew correction and image forming apparatus

An image forming apparatus including a sheet feeding device, an image forming device for forming an image on a sheet fed, a plurality of conveying paths for directing the sheet on which the image has been formed to discharging portions, a changeover device for selecting a desired conveying path from the plurality of conveying paths and a changeover controlling device for controlling the changeover device in conformity with whether a reading device for reading the image of an original has been set at a predetermined position in a body of the apparatus.

Image forming apparatus provided with conveying path changeover device

A both-face automatic original feeding apparatus wherein a plurality of originals having images on their first and second surfaces are successively supplied from an original stacking portion to a predetermined position for reading an original, and each original is reversely rotated through a switch-back path after the first surface of the original passes through the predetermined position, thereby supplying the original to the predetermined position again to direct the second surface of the original to the predetermined position. In such a feeding apparatus, there is provided an introduction path for directing the original supplied from the original stacking portion to the predetermined position; a first discharge path for directing the original to the switch-back path after the original passes through the predetermined position; a surface reverse path for directing the original from the switch-back path to the predetermined position after reversing a first surface and a rear surface of the original; and a controller for controlling the apparatus in such a manner that a preceding original is switched back to convey it in the surface reverse path while a succeeding original is being passed through the predetermined position, and, when a trailing end of the succeeding original leaves the predetermined position, a tip end of the preceding original reaches the predetermined position.

Both-face automatic original feeding apparatus

The present invention provides a sheet feeding apparatus which includes a first conveying device for conveying a sheet stack formed in a stepped fashion by offsetting each sheet by a predetermined distance in a predetermined direction toward the predetermined direction or toward an opposite direction, a separating device disposed at a downstream side of the first conveying means in the predetermined direction and adapted to separate an outermost sheet from the sheet stack being fed by the first conveying device, a second conveying device for conveying the sheet separated by the separating device, and control device for controlling the first conveying device in such a manner that the first conveying device is activated to convey the sheet stack in the predetermined direction and the first conveying device is stopped after the sheet separated by the separating device starts to be conveyed by the second conveying device.

Growing community of inventors

Toride, Japan

Noriaki Koyanagi