Ricoh Company, Ltd.

Akihiro Musha

Takashi Saito

Shingo Matsushita

Nobuyoshi Suzuki

Yuusuke Shibasaki

Ikuhisa Okamoto

Katsuhiro Kosuge

Takuya Morinaga

Makoto Hidaka

Kiyoshi Hata

Wataru Takahashi

Ryuji Yoshida

Shuuya Nagasako

Hitoshi Hattori

Satoshi Saito

Naohiro Kikkawa

Naoyuki Ishikawa

Hidetoshi Kojima

Naoki Oikawa

Go Aiba

Shohichi Satoh

Kei Sasaki

Takamasa Matsumoto

Jun Yamada

Keisuke Sugiyama

Takeshi Akai

Takao Watanabe

Takuya Sano

Joh Ebara

Kyosuke Nakada

Takaya Ochiai

Hirotaka Hayashi

Takehisa Shimazu

Nagayasu Yoshida

Masatada Satoh

A sheet processing device includes a sheet processing unit that is moved to perform sheet processing on a sheet; a sheet-processing moving unit that moves the sheet processing unit; a drive-mode determining unit that determines a drive mode of the sheet-processing moving unit; and a drive control unit that drives the sheet-processing moving unit in accordance with the drive mode. The drive-mode determining unit determines the drive mode such that the sheet processing unit is moved at combination acceleration that is a combination of first acceleration and second acceleration with a shift of time that is determined based on the cycle of the natural vibration that occurs during acceleration of the sheet processing unit.

Sheet processing device, image forming system, and computer-readable storage medium

A sheet processing apparatus includes: a sheet fastening unit of a pressing fastener method in which a bundle of sheets is fastened by using a pair of pressing fastener members; a conveying unit that conveys the bundle of sheets that are fastened by the sheet fastening unit; a separating unit that, after the sheet fastening unit performs a fastening operation on the bundle of sheets, moves both one and the other pressing fastener members, between which the bundle of sheets is interposed, so as to separate a sheet that adheres to the pressing fastener member; and a control unit that, after the separating unit finishes an operation to separate the sheet, controls the conveying unit so as to convey the bundle of sheets that are fastened by the sheet fastening unit.

Sheet processing apparatus, image forming system, and image forming apparatus

A sheet processing device comprising: a pressing unit that presses a fold line part of a folded sheet bundle; and a moving unit that moves a pressing position of the pressing unit in a fold direction of the folded sheet bundle, wherein the pressing unit includes a pair of pressing rollers that holds the folded sheet bundle therebetween, and the pair of pressing rollers changes an angle &#x3b8; between a thickness direction of the folded sheet bundle and a line connecting the rotational centers of the pressing rollers in the middle of movement.

Sheet processing device, image forming system, and method of additionally folding sheet bundle

According to an aspect of an embodiment, a sheet processing apparatus includes: a conveying unit configured to convey sheets; a stacking unit configured to stack the conveyed sheets to form a sheet stack; and a binding unit configured to include a pair of toothed jaw and bind the sheet stack by pressing the sheet stack between the pair of toothed jaw, wherein at least one portion of edges of the toothed jaw is rounded.

Sheet processing apparatus having binding unit and image forming system thereof

The present invention is concerning a method for attaching a pair of crimping members in a sheet binding device that binds a sheet bundle by engagement of the pair of crimping members, wherein at least one of the crimping members is attached to a member to which the one of the crimping members is to be attached in a state where the pair of crimping members is in engagement.

Method for attaching crimping members, sheet binding device, and image forming apparatus

The present invention is concerning a sheet processing device comprising: a pressing unit that includes a first pressing roller arranged on one side of a thickness direction of a folded sheet bundle, and a second pressing roller and a third pressing roller arranged on the other side across a fold line part of the folded sheet bundle, and a moving unit that moves the pressing unit in a state in which each of a first line and a second line is not parallel to the thickness direction of the folded sheet bundle, the first line connecting the rotational center of the first pressing roller and the rotational center of the second pressing roller, and the second line connecting the rotational center of the first pressing roller and the rotational center of the third pressing roller.

A sheet processing apparatus includes a conveyance unit to transport a sheet bundle including multiple sheets in a sheet conveyance direction and a binding device including a clamping unit. The clamping unit includes multiple projections and multiple recesses to engage the respective projections to clamp the sheet bundle inserted therebetween. At least one of the multiple projections includes an inclined portion facing a sheet conveyance direction, and an inclination of the inclined portion is 45 degrees or smaller relative to a face parallel to the sheet conveyance direction.

Clamping binding device

A postprocessing apparatus includes a stacking unit that stacks a sheet, an abutting unit that corrects a conveying direction of the sheet, a return roller that abuts the sheet against the abutting unit, a shift conveying unit that shifts the sheet in a width direction, and a width direction detector that detects a width direction position of the sheet. When the sheet is shifted by the shift conveying unit by a predetermined amount, passed to the return roller, and abutted against the abutting unit, distances A and B are nearly the same, where the distance A is a distance from a conveying direction position of a side of the sheet to a rear end of the sheet and the distance B is a distance from the return roller to the abutting unit.

Postprocessing apparatus, and image forming apparatus and image forming system including the postprocessing apparatus

A sheet binding device binds a sheet bundle by causing a movable-crimping-member moving unit to move a movable crimping member thereby holding a sheet bundle between crimping members. The movable-crimping-member moving unit includes: a link mechanism that includes a first link member rotatably connected to the movable crimping member, a second link member rotatably connected to a fixed member fixed to a device body and connected to the first link member through a connecting part; a connecting member rotatably connected to the connecting part, and capable of moving between a first position causing the link mechanism to be extended and a second position causing the link mechanism to be more flexed than in the first position; and a connecting-member moving unit that includes a rotary member capable of rotating on a displaceable rotating shaft, and reciprocates the connecting member by rotation of the rotary member in one direction.

Sheet binding device, sheet processing apparatus, image forming apparatus, image forming system, and sheet binding method

A sheet processing apparatus including a stacking tray that stacks sheets, a conveying member that conveys a sheet to the stacking tray and discharges the sheet bundle from the stacking tray, wherein the conveying member includes a conveying roller and a conveying belt stretched by a plurality of stretch rollers, and a sheet processor that performs predetermined processing to the sheet bundle. When the conveying member conveys the sheet to the stacking tray, a part of the conveying belt that is not wound on the stretch roller contacts the conveying roller by moving the conveying belt as such a nip for conveying the sheet is formed. When the conveying member discharges the sheet bundle from the stacking tray, a part of the conveying belt that is wound on the stretch roller contacts the conveying roller by moving the conveying belt so that a nip for conveying the sheet is formed.

Sheet processing apparatus and image forming system

A sheet processing apparatus includes a pair of squeezing members having a projection and a recess to engage each other, to squeeze a sheet bundle inserted therebetween in a direction of thickness of the sheet bundle, and a pressure applying unit to apply pressing force to the squeezing members to squeeze and bind the sheet bundle. The pressing force generated between the squeezing members by the pressure applying unit increases in strength as a relative distance between the squeezing members decreases.

Sheet processing apparatus, image forming system, and sheet binding method

A creasing device forms a crease in a to-be-folded portion of a sheet. The creasing device includes a sheet-information reading unit that reads any one of sheet information and binding information; a determining unit that determines a surface, on which the crease is to be formed, of the sheet according to the one of the sheet information and the binding information read by the sheet-information reading unit; and a creasing unit that forms the crease on the surface determined by the determining unit.

Creasing device, image forming system, and creasing method

A sheet processing apparatus performs predetermined processing on a sheet or a sheet bundle. The sheet processing apparatus includes: a conveying unit that conveys a sheet along a conveying path; an aligning unit that, each time a sheet is conveyed by the conveying unit, aligns the sheet; a stacking unit that reverses a conveying direction of a sheet to convey the sheet backward to a branch path branched from the conveying path, and stacks the sheet in the branch path; and a binding unit that binds a sheet bundle aligned by the aligning unit, in the conveying path.

Sheet processing apparatus, image forming system, and sheet processing method

A sheet processing apparatus includes a stacking channel to stack multiple sheets into a sheet bundle, and a binding device to bind together the sheet bundle, the binding device including multiple clamping portions to clamp the sheet bundle to create multiple clamping marks on the sheet bundle. When the binding device binds a corner area of the sheet bundle, a longitudinal direction of each of the multiple clamping marks forms an angle within a range from 30 degrees to 60 degrees with a side of the corner area of the sheet bundle.

A skew correction device for aligning a booklet that is a folded bundle of sheets on a conveying path includes a first member against which a leading end of the booklet abuts in a conveying direction; a second member configured to push a trailing end of the booklet in the conveying direction so that the leading end of the booklet abuts against the first member; and a deflection generating member configured to deflect the booklet downward when the trailing end is pushed.

Growing community of inventors

Kanagawa, Japan

Akihiro Musha