Patent application number | Description | Published |
20080237973 | SHEET POST-PROCESSING APPARATUS - A sheet post-processing apparatus includes driving rollers that are arranged in a leading end position in a sheet conveying direction of a standby tray and axis of which are perpendicular to the conveying direction and driven rollers that rotate following the driving rollers and are provided in a front portion in the sheet conveying direction of the standby tray such that an interval thereof narrows in the sheet conveying direction. The driven rollers may be arranged in the front in the sheet conveying direction of the standby tray while being spaced apart from the standby tray. | 10-02-2008 |
20080315481 | SHEET FINISHER, IMAGE FORMING APPARATUS USING THE SAME, AND SHEET FINISHING METHOD - A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, and a fold reinforcing unit configured to reinforce the fold line formed by the fold unit, and the fold reinforcing unit includes a placement table on which the sheet bundle transported from the fold unit is placed, a band-like elastic member that is extended to face the fold line of the placed sheet bundle and is formed to be longer than the length of the fold line, and a roller unit that includes a reinforce roller and moves the reinforce roller along the direction of the fold line while pressing it to the fold line through the intervening elastic member. | 12-25-2008 |
20080315482 | SHEET FINISHER, IMAGE FORMING APPARATUS USING THE SAME, AND SHEET FINISHING METHOD - A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, and a fold reinforcing unit configured to reinforce the fold line formed by the fold unit, the fold reinforcing unit includes a roller unit that includes a first roller and a second roller, nips the fold line of the sheet bundle transported from the fold unit between the first roller and the second roller, and moves along a direction of the fold line while pressing, and a drive unit configured to move the roller unit along the direction of the fold line from a standby position located at a position separate from an end of the sheet bundle, and the first roller and the second roller are separate from each other at the standby position, and approach each other to nip the fold line in a region where the fold line of the sheet bundle exists. | 12-25-2008 |
20080315483 | SHEET FINISHER, IMAGE FORMING APPARATUS USING THE SAME, AND SHEET FINISHING METHOD - A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, a fold reinforcing unit that includes a reinforce roller, moves the reinforce roller along a direction of the fold line while applying pressure by the reinforce roller to the fold line of the sheet bundle transported from the fold unit, and reinforces the fold line, and a control unit configured to transport the sheet bundle from the fold unit to the fold reinforcing unit and to control to stop the fold line of the sheet bundle at a position of the reinforce roller, and the control unit changes, according to a thickness of the sheet bundle, a transport distance from a specified position in the fold reinforcing unit to the position where the sheet bundle is stopped. | 12-25-2008 |
20080315484 | SHEET FINISHER, IMAGE FORMING APPARATUS USING THE SAME, AND SHEET FINISHING METHOD - A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle, in which printed sheets are bundled, with a staple, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, and a fold reinforcing unit configured to reinforce the fold line formed by the fold unit, the fold reinforcing unit includes a roller unit that includes a reinforce roller and moves along a direction of the fold line while applying pressure by the reinforce roller to the fold line of the sheet bundle transported from the fold unit, a drive unit configured to move the roller unit along the direction of the fold line, and a control unit configured to control a movement speed of the roller unit, and the control unit causes the roller unit to move at a first speed in an outside of a specified range including the edge of the staple, and causes the roller unit to move at a second speed not higher than the first speed in the specified range including the edge of the staple. | 12-25-2008 |
20080315485 | SHEET FINISHER, IMAGE FORMING APPARATUS USING THE SAME, AND SHEET FINISHING METHOD - A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, and a fold reinforcing unit configured to reinforce the fold line formed by the fold unit, the fold reinforcing unit includes a roller unit that includes a first roller and a second roller, and moves along a direction of the fold line while nipping and pressing the fold line of the sheet bundle transported from the fold unit by the first roller and the second roller, a drive unit configured to move the roller unit along the direction of the fold line from a standby position located at a position separate from an end of the sheet bundle, and a nip unit that includes a first nip plate and a second nip plate, and configured to nip the sheet bundle transported from the fold unit at a position between the fold line and the fold unit, and in the nip unit, the first nip plate and the second nip plate are opened in a thickness direction of the sheet bundle when the roller unit is located at the standby position, and the first nip plate and the second nip plate are closed to nip the sheet bundle when the roller unit reinforces the fold line after the sheet bundle is transported to between the first nip plate and the second nip plate. | 12-25-2008 |
20080315486 | SHEET FINISHER, IMAGE FORMING APPARATUS USING THE SAME, AND SHEET FINISHING METHOD - A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit that includes a pair of fold rollers and presses the center stitched by the saddle stitch unit into a nip of the fold rollers to form a fold line, and a fold reinforcing unit configured to reinforce the fold line, and the fold reinforcing unit includes a roller unit that includes a first roller and a second roller, and moves along a direction of the fold line while nipping and pressing the fold line of the sheet bundle by the first roller and the second roller, a drive unit configured to move the roller unit along the direction of the fold line from a standby position, and a nipping unit that includes a first nip plate and a second nip plate, places the sheet bundle on the first nip plate, and nips the sheet bundle at a position between the fold line and the fold unit by the first nip plate and the second nip plate, and a position of the nip of the fold rollers and a position of a nip generated by the first roller and the second roller are disposed to be substantially coincident with a position on an imaginary plane extending from a sheet bundle placement surface of the first nip plate. | 12-25-2008 |
20080315487 | SHEET FINISHER, IMAGE FORMING APPARATUS USING THE SAME, AND SHEET FINISHING METHOD - A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, and a fold reinforcing unit configured to reinforce the fold line formed by the fold unit, the fold reinforcing unit includes a placement table on which the sheet bundle transported from the fold unit is placed, and a roller unit that includes a reinforce roller and moves the reinforce roller along a direction of the fold line while pressing it to the fold line, and the placement table is provided with a groove-like edge clearance along an edge of the sheet bundle. | 12-25-2008 |
20080315488 | SHEET FINISHER, IMAGE FORMING APPARATUS USING THE SAME, AND SHEET FINISHING METHOD - A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, and a fold reinforcing unit configured to reinforce the fold line formed by the fold unit, the fold reinforcing unit includes a roller unit that includes a reinforce roller with a structure for preventing an occurrence of a wrinkle, and moves along a direction of the fold line while applying pressure by the reinforce roller to the fold line of the sheet bundle transported from the fold unit, and a drive unit configured to move the roller unit along the direction of the fold line from a standby position located at a position separate from an end of the sheet bundle. | 12-25-2008 |
20080318752 | SHEET FOLDING APPARATUS, SHEET FOLDING UNIT AND IMAGE FORMING APPARATUS - A sheet folding apparatus, including: a stacker configured to stack a plurality of sheets; a first folding roller configured to rotate around a first axis; a second folding roller configured to rotate around a second axis which is parallel with the first axis and biased to the first folding roller separably to make a nip together with the first folding roller therebetween; a blade unit configured to push a surface of the plurality of sheets, stacked by the stacker, into the nip; a stationary support configured to support the blade unit linearly movable to avoid deviating from a common tangential direction of the first folding roller and the second folding roller at the nip to a first folding roller side; and a movable support relatively movable against the blade unit, configured to bias the blade unit to the first folding roller side deviatably from the common tangential direction to a second folding roller side. | 12-25-2008 |
20080318753 | SHEET FOLDING APPARATUS, SHEET FOLDING UNIT AND IMAGE FORMING APPARATUS - A sheet folding apparatus, including: a stacker configured to stack a plurality of sheets; a first folding roller configured to rotate around a first axis; a second folding roller configured to rotate around a second axis which is in parallel with the first axis and biased to the first folding roller separably to make a nip together with the first folding roller therebetween; a blade unit configured to push a surface of the plurality of sheets stacked by the stacker, into the nip; a first support configured to support the blade unit and configured to move linearly in a common tangential direction of the first folding roller and the second folding roller at the nip; and a second support configured to support the blade unit, configured to move linearly in the common tangential direction when the blade unit passes a section between where the blade unit starts touching at the plurality of sheets and where the plurality of sheets approaches the nip, and configured to deviate the blade away from the common tangential line to the second folding roller side with blocking deviating the blade unit away from the common tangential line to a first folding roller side when the plurality of sheets approaches the nip. | 12-25-2008 |
20080318754 | SHEET FOLDING APPARATUS, SHEET FOLDING UNIT AND IMAGE FORMING APPARATUS - A sheet folding unit, including: a first folding roller configured to rotate around a first axis; a second folding roller configured to rotate around a second axis which is in parallel with the first axis and biased to the first folding roller separably to a separating direction to make a nip together with the first folding roller therebetween; a blade configured to push a surface of a sheet into the nip; and a roller cover configured to move together with the second folding roller in the separating direction to prevent the second folding roller contacting the sheet when the blade unit starts contacting the sheet. | 12-25-2008 |
20090014950 | SHEET POST-PROCESSING APPARATUS HAVING EXCELLENT SHEET STACKING CAPABILITY - A sheet post-processing apparatus discharges and conveys a sheet from a process tray to a storage tray, and decelerates a bundle hook and a paper discharge roller when the bundle hook reaches a discharge start position of a bundle of sheets. At this time, a tangential speed of the paper discharge roller is faster than a movement speed of the bundle hook. Subsequently, the sheet post-processing apparatus stops the paper discharge roller in accordance with a rotation position of the bundle hook, and then decelerates the movement speed of the bundle hook. After the sheets are stacked on the storage tray, the bundle hook accelerates to return to a home position. Additionally, the sheet post-processing apparatus includes a spool | 01-15-2009 |
20090033015 | SHEET FOLDING APPARATUS, SHEET FOLDING METHOD, AND IMAGE FORMING APPARATUS - A sheet folding apparatus including a sheet supporting member which has an inclined surface to support a stack of sheets, a sheet position adjuster which adjusts a position of the stack of sheets along the inclined surface, a sheet pressing unit which presses the stack of sheets against the inclined surface, a folding unit which folds the stack of sheets pressed by the sheet pressing unit, and a controller which controls the sheet pressing unit to press the stack of sheets on the sheet position adjuster against the inclined surface, and to create a gap between the stack of sheets on the sheet position adjuster and the sheet pressing unit to receive a sheet onto the sheet position adjuster. | 02-05-2009 |
20090033016 | SHEET FOLDING APPARATUS, SHEET FOLDING METHOD, AND IMAGE FORMING APPARATUS - A sheet folding apparatus includes an adjuster which supports a stack of sheets stacked on an inclined surface of a sheet path and adjusts a position of the stack of sheets along the inclined surface, a stapler which staples the stack of sheets set at a stapling position, a folding unit which folds the stack of sheets set at a folding position, and a guide provided between the stapler and the folding unit. The stapler ejects a staple from a staple surface by sinking from the inclined surface. The folding unit includes folding rollers and a folding blade which inserts the stack of sheets into a nip between the folding rollers. The guide includes a loading surface offset from the staple surface and an uprising member which is disposed on a part of the loading surface to keep the stack of sheets symmetric with respect to the folding rollers. | 02-05-2009 |
20090033018 | SHEET FOLDING APPARATUS, SHEET FOLDING METHOD, AND IMAGE FORMING APPARATUS - A sheet folding apparatus includes a sheet supporting member which has an inclined surface to support a stack of sheets, a sheet position adjuster which adjusts a position of the stack of sheets along the inclined surface, a sheet pressing unit which presses the stack of sheets from a lower side of the stack of sheets to an upper side of the stack of sheet, and a folding unit which folds the stack of sheets pressed by the sheet pressing unit. | 02-05-2009 |
20090036287 | METHOD OF FOLDING IN THE MIDDLE AND SHEET POST-PROCESSING APPARATUS PROVIDED WITH SADDLE UNIT - A saddle unit provided with a fold-enhancing unit for performing fold enhancement of sheets of paper folded in the middle. The fold-enhancing unit includes a fold-enhancing roller mechanism which performs the fold-enhancing operation in the direction orthogonal to the sheet carrying direction. The fold-enhancing roller mechanism includes a fold-enhancing roller pair that pinches and presses a bundle of sheets at a nip. The roller guide pair provided in the fold-enhancing roller mechanism guides the sheets of paper to the nip of the fold-enhancing roller pair when enhancing the fold of the sheets of paper. The saddle unit changes one or both of the number of times and the velocity of the reciprocating movement according to one or both of the number of sheets of paper and the quality mode which is entered and set by the user from the operation panel of an image forming apparatus or job-set by the personal computer by a user. | 02-05-2009 |
20100219575 | SHEET FINISHER, IMAGE FORMING APPARATUS USING THE SAME, AND SHEET FINISHING METHOD - A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, and a fold reinforcing unit configured to reinforce the fold line formed by the fold unit, the fold reinforcing unit includes a placement table on which the sheet bundle transported from the fold unit is placed, and a roller unit that includes a reinforce roller and moves the reinforce roller along a direction of the fold line while pressing it to the fold line, and the placement table is provided with a groove-like edge clearance along an edge of the sheet bundle. | 09-02-2010 |
20100252982 | SHEET POST-PROCESSING APPARATUS HAVING EXCELLENT SHEET STACKING CAPABILITY - A sheet post-processing apparatus discharges and conveys a sheet from a process tray to a storage tray, and decelerates a bundle hook and a paper discharge roller when the bundle hook reaches a discharge start position of a bundle of sheets. At this time, a tangential speed of the paper discharge roller is faster than a movement speed of the bundle hook. Subsequently, the sheet post-processing apparatus stops the paper discharge roller in accordance with a rotation position of the bundle hook, and then decelerates the movement speed of the bundle hook. After the sheets are stacked on the storage tray, the bundle hook accelerates to return to a home position. Additionally, the sheet post-processing apparatus includes a spool | 10-07-2010 |
20110057375 | SHEET FINISHER, IMAGE FORMING APPARATUS USING THE SAME, AND SHEET FINISHING METHOD - A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, and a fold reinforcing unit configured to reinforce the fold line formed by the fold unit, the fold reinforcing unit includes a roller unit that includes a reinforce roller with a structure for preventing an occurrence of a wrinkle, and moves along a direction of the fold line while applying pressure by the reinforce roller to the fold line of the sheet bundle transported from the fold unit, and a drive unit configured to move the roller unit along the direction of the fold line from a standby position located at a position separate from an end of the sheet bundle. | 03-10-2011 |
20110105291 | SHEET FOLDING APPARATUS, SHEET FOLDING UNIT AND IMAGE FORMING APPARATUS - A sheet folding unit, including: a first folding roller configured to rotate around a first axis; a second folding roller configured to rotate around a second axis which is in parallel with the first axis and biased to the first folding roller separably to a separating direction to make a nip together with the first folding roller therebetween; a blade configured to push a surface of a sheet into the nip; and a roller cover configured to move together with the second folding roller in the separating direction to prevent the second folding roller contacting the sheet when the blade unit starts contacting the sheet. | 05-05-2011 |
20110156333 | SHEET FINISHER, IMAGE FORMING APPARATUS USING THE SAME, AND SHEET FINISHING METHOD - A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle, in which printed sheets are bundled, with a staple, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, and a fold reinforcing unit configured to reinforce the fold line formed by the fold unit, the fold reinforcing unit includes a roller unit that includes a reinforce roller and moves along a direction of the fold line while applying pressure by the reinforce roller to the fold line of the sheet bundle transported from the fold unit, a drive unit configured to move the roller unit along the direction of the fold line, and a control unit configured to control a movement speed of the roller unit, and the control unit causes the roller unit to move at a first speed in an outside of a specified range including the edge of the staple, and causes the roller unit to move at a second speed not higher than the first speed in the specified range including the edge of the staple. | 06-30-2011 |
20110181917 | SHEET FINISHER, IMAGE FORMING APPARATUS USING THE SAME, AND SHEET FINISHING METHOD - A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, and a fold reinforcing unit configured to reinforce the fold line formed by the fold unit, and the fold reinforcing unit includes a placement table on which the sheet bundle transported from the fold unit is placed, a band-like elastic member that is extended to face the fold line of the placed sheet bundle and is formed to be longer than the length of the fold line, and a roller unit that includes a reinforce roller and moves the reinforce roller along the direction of the fold line while pressing it to the fold line through the intervening elastic member. | 07-28-2011 |
20110278784 | SHEET FINISHER, IMAGE FORMING APPARATUS USING THE SAME, AND SHEET FINISHING METHOD - A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, a fold reinforcing unit that includes a reinforce roller, moves the reinforce roller along a direction of the fold line while applying pressure by the reinforce roller to the fold line of the sheet bundle transported from the fold unit, and reinforces the fold line, and a control unit configured to transport the sheet bundle from the fold unit to the fold reinforcing unit and to control to stop the fold line of the sheet bundle at a position of the reinforce roller, and the control unit changes, according to a thickness of the sheet bundle, a transport distance from a specified position in the fold reinforcing unit to the position where the sheet bundle is stopped. | 11-17-2011 |
20140320580 | HEAT SOURCE UNIT AND ERASING APPARATUS USING THE HEAT SOURCE UNIT - A heat source opening and closing mechanism, around a rotation shaft of which a plurality of spring members are wound, is opened and closed an outside unit including a first heating member and a second press roller against an inside unit including a second heating member and a first press roller. The heat source opening and closing mechanism is opened and closed among a closed position where the first press roller faces to the first heating member and the second press roller faces to the second heating member, a first open state in which the load by the outside unit is commensurate with a first elastic force of the spring member, and a second open state in which an opening angle is larger than that in the first open state. | 10-30-2014 |