Fuji Xerox Co., Ltd.

Junichirou Sameshima

Norio Hokari

Yukio Hayashi

Mikio Kobayashi

Shuji Iseki

Ryoichi Tsuruoka

Takeshi Okoshi

Satoshi Honobe

Toshikazu Tsumita

Satoshi Fukada

Tomonori Sato

Yoshiaki Watanabe

Atsuyuki Kitamura

Wataru Suzuki

Masaaki Tokunaga

Nobuo Hyakutake

Hiroki Ando

Yoshiyuki Takashima

Tsuneo Fukuzawa

Yoshihiro Enomoto

Toshiyuki Matsui

Satoru Torimaru

Fumiaki Maekawa

Ryouichi Tsuruoka

Takizo Sagawa

Kenji Tomizawa

An image forming apparatus includes: an image carrier; a latent-image forming device; a developing device; a latent-image forming device contacting/separating mechanism; and a developing device contacting/separating mechanism, and the latent-image forming device contacting/separating mechanism allows the latent-image forming device to be movable to the latent-image forming device contacting position in a state where the developing device is moved to the developing device contacting position.

Image forming apparatus component positioning mechanism

An image-forming apparatus includes: first and second frame members opposing each other; image-holding members each having a rotation shaft; a supporting unit provided to the first frame member and having insertion holes each supporting an end portion of a rotation shaft of a corresponding image-holding member inserted in an insertion direction from the second frame member to the first frame member; and flat elastic bodies provided to the respective insertion holes, each flat elastic body having a plate member bent to form: an attachment part attached to the supporting unit; a leg part extending from the attachment part in the direction opposite to the insertion direction; and an elastic part extending from the leg part in the insertion direction through the insertion hole to press the end portion of the rotation shaft at a position spaced apart from the insertion hole in the insertion direction.

Image-forming apparatus

There are plural subunits having a positional relationship that at least one of the subunits is located at such a position as to obstruct an operation of replacing another. There are provided positioning portions that are provided on the main body frame and position the respective subunits, and a subunit releasing mechanism that moves at least an outside subunit from a positioning and fixing position to a prescribed releasing position or a subunit fixing mechanism that holds the outside subunit at a prescribed releasing position and moves it from the released position to a prescribed, positioning and fixing position. Also provided is an axial movement prohibiting portion that prohibits in advance axial movement of a subunit before it is positioned. Further, a two-direction positioning portion is allowed to position a subunit preferentially over a one-direction positioning portion.

Subunit attaching structure and subunit attaching/removing method in image forming apparatus

An endless belt type delivery device includes a drive roller, a plurality of driven rollers including a tension apply roller disposed in such a manner that the respective axial directions of the rollers are set parallel to each other, an endless belt wound around the respective rollers in such a manner that the endless can be driven by rotating the drive roller, and meandering adjusting means, provided in at least two of the above-mentioned rollers, for biasing contact pressures between the two or more rollers and the endless belt toward the axial-direction end portions of the rollers. The contact pressure between the rollers and the endless belt are biased in the opposite direction to the meandering direction of the endless belt by the meandering adjusting means, thereby being able to correct the meandering of the endless belt.

Endless belt type delivery device

A transfer drum includes a pair of annular frames, a coupling member for coupling the annular frames, and a transfer material holding member being wrapped around the annular frames. In the transfer drum, the coupling member is attached so that a top face of a main body, other than attachment ends of the coupling member, is positioned relative to the annular frames to be lower than outer peripheral surfaces of the annular frames. The transfer material holding member has ends in a circumferential direction overlapped on and bonded to each other and ends in an axial direction stuck to the outer peripheral surfaces of the annular frames. The transfer material holding member is attached so that it is placed out of contact with the top face of the main body of the coupling member.

Transfer drum

In an optical detecting device, used for an image forming apparatus, for detecting an object to be detected, such as a paper, by an optical means including a light emitting means 20c, a photo sensing means 20d, a reflecting means 20b, and the like, there is provided at least one of a paper detecting devices in which conductive attracting means connected to a predetermined potential is disposed close to the optical means, the optical means is attached to a periodical replacing component of the image forming apparatus, a reflecting means 20b and a paper transporting path are oriented in different directions with respect to a photo sensing means 20d and a distance from the light emitting means 20c and the like to the reflecting means 20b is different from a distance from the light emitting means 20c and the like to the paper transporting path.

Optical detecting device for an image forming apparatus and an image

A belt transporter roller for an image forming apparatus according to the present invention has a rotating shaft of an elastic roller; and an elastic fin wound around the rotating shaft and provided along an axial direction thereof, the fin including at least two spiral groups different in winding direction.

Roller for belt transporting apparatus and image forming apparatus

The method reduces vibrations generated in a contactor due to movement of the moving body by which the contactor contacts with a moving body. When a stroke of vibration of the contactor is halved at an intermediate point of an amplitude thereof, the vibrations are made different from each other in frequency between the reciprocation stroke in the forward side which corresponds to one of the halved stroke portions and the reciprocation stroke in the backward side which corresponds to the other halved stroke portion.

Vibration reducing method

An image formation apparatus for forming an image includes an endless belt member and an inner face cleaning member which is provided on an inner face of the endless belt member. The cleaning member captures deposits deposited on the inner face of the endless belt member and holds the captured deposits. The inner face cleaning member includes fibers densely arranged and projecting radially outward from the inner face cleaning member. The inner face cleaning member is fixed in a contact state so that a contact face does not move while the endless belt is moving.

Inner face cleaning member for an intermediate transfer device

In order to set a position of a movable member in which a strip-like movable member which is disposed to be movable along a width direction perpendicular to a longitudinal direction of the member is disposed so that one edge of the movable member along the longitudinal direction facing a defined line; and the strip-like movable member is positioned with respect to a fixing member under a condition where the one edge is parallel to the defined line to maintain a uniform protruding amount from the defined line is maintained, the one edge of the movable member is made coincident with the defined line; the movable member is temporily fixed to the fixing member by interposing a position setting jig according to the protruding amount between the movable member and the fixing member; and after cancelling the temporarily fixing step to remove the position setting jig, directly fixing the movable member to the stationary member. Alternatively, a position setting jig according to the protruding amount is made coincident with the define line; and after abutting the one edge of the movable member against the position setting jig, the movable member is fixed to the fixing member. Further, position setting jigs for a movable member suitable for the above methods is provided.

Method of setting a position of a movable member, and a position setting

To bring a sheet 6 electrostatically into intimate contact with a conveyor belt 1 for transporting the sheet 6 by attraction means 60, a press roll 50A for pressing the sheet 6 against the conveyor belt 1 is disposed upstream from the attraction means 60. The press roll 50A is formed at the center with a large diameter part 51 for pressing the center of the sheet 6 stronger than both ends thereof. When transfer to the rear side of the sheet is executed at double-sided image formation, if both ends of the sheet 6 come in contact with the conveyor belt 1, the center of the sheet 6 is pressed strong, whereby deformation at the center is suppressed and a swell is smoothed out in the both-end direction. Relief parts at the rear end of the sheet are also prevented. Resultantly, the intimate contact property of the sheet 6 with the conveyor belt 1 is improved.

Image formation system with swell correction

Image forming apparatus with transfer belt pressing member

An image forming apparatus including a plural number of paper transporting units including at least first and second paper transporting units, in-unit paper sensing mechanism located in the first paper transporting unit, unit-to-unit paper sensing mechanism located between the first and second paper transporting units, and drive control mechanism for controlling the operations of the plural number of the paper transporting units, wherein the drive control mechanism includes first mechanism operating such that when any of the in-unit paper sensing mechanism located in the first paper transporting unit detects a paper transport trouble, the first mechanism stops the paper transporting operation of the second paper transporting unit in response to a sensing signal indicative of the presence of a paper from the unit-to-unit paper sensing mechanism, and second mechanism stops the paper transporting operation of the first paper transporting unit upon the stop of the paper transporting operation of the second paper transporting unit, and drives the first paper transporting unit to move the paper a predetermined distance in the direction that is reverse to the normal direction.

Growing community of inventors

Ebina, Japan

Junichirou Sameshima