| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 271114000 | Variably or intermittently driven | 11 |
| 20080265489 | Automatic Document Feeder - An automatic document feeder with a drive system that can efficiently handle double-side scanning and accommodate more than one timing sequence for sequentially picking individual sheets from a stack using only two motors—a pick motor and a media motor. The automatic document feeder includes a pickup unit with a pick roller, a set of de-skew rollers, a main media path configured to guide a media sheet from the pickup unit to a scanning region and from the scanning region to an output tray, and a switch-back path configured to guide the media sheet back into the main media path. The drive system is operable to provide a high-speed picking mode and a delayed picking mode. In the high-speed picking mode, the pickup unit is driven by the pick motor to pull a subsequent media sheet from a stack of media sheet as soon as a previously pulled media sheet has passed the pick roller. In the delayed picking mode, the de-skew rollers are driven by the pick motor to advance the media sheet toward the scanning region and the subsequent media sheet is pulled from the stack by the pickup unit when the previously pulled media sheet has passed the de-skewed rollers. | 10-30-2008 |
| 20090057987 | SHEET CARRYING DEVICE, DOCUMENT CARRYING DEVICE, IMAGE FORMING APPARATUS, AND SHEET CARRYING METHOD - A sheet carrying device includes a pickup roller sending out a sheet to a carrying path one by one from a document mounting tray, a roller first driving motor rotating the pickup roller, a control section controlling the roller first driving motor, and a slip detecting device detecting whether the pickup roller slips in an amount not less than a predetermined amount in carrying the sheet. Detecting that the pickup roller slips, the control section controls the roller first driving motor to perform a slip-settling operation for decreasing a start-up acceleration of the pickup roller from a time when starting to rotate to a time when reaching a predetermined speed. This allows reliably carrying a sheet and suppressing a decrease in a carrying speed of the sheet in order to prevent a decrease in a speed of a process including sheet carrying, even when the pickup roller slips in feeding the sheet from the sheet mounting tray. | 03-05-2009 |
| 20100096800 | SHEET PROCESSING APPARATUS AND IMAGE FORMING APPARATUS HAVING THE SAME - A sheet processing apparatus including a cross-directionally moving device for moving a sheet in a direction crossing a sheet discharging direction, and a cross-side restricting member for receiving one side edge of the sheet moved in the crossing direction by the cross-directionally moving device, and restricting the movement of the sheet, wherein the cross-directionally moving device moves the next sheet from a position between the other side edge of the sheet received by the cross-side restricting member and the cross-side restricting member to the cross-side restricting member. | 04-22-2010 |
| 20100133741 | MANUAL SHEET FEEDER AND IMAGE FORMING APPARATUS INCLUDING SAME - A manual sheet feeder including a pickup roller; a pickup arm; a sheet stopper; a rotation regulation member; a solenoid including a movable core having a straight line motion; a solenoid link rotatively coupled to the movable core; and a first spring to bias the pickup arm in a direction in which the pickup arm is rotated downward. At start of sheet feeding operation, the pickup arm is rotated by the first spring in a direction in which the pickup roller is moved downward in conjunction with rotation of the solenoid link caused by the straight line motion of the movable core in one direction, and the rotation regulation member is rotated in conjunction with the rotation of the solenoid link caused by the straight line motion of the movable core in the one direction to release regulation of rotation of the sheet stopper. | 06-03-2010 |
| 20110198800 | RETARD ROLLER AND RETARD ROLLER MODULE HAVING SUCH RETARD ROLLER - A retard roller and a retard roller module are provided. The retard roller is used in an automatic document feeder for providing a frictional force to separate plural documents from each other. Unidirectional rotation of the retard roller is permitted. Due to the unidirectional rotation, the contact surface of the retard roller can be switched. During the sheet-feeding process, the document is contacted with a specified contact surface. By rotating the retard roller, the document is contacted with another contact surface. | 08-18-2011 |
| 20110316222 | SHEET FEEDING APPARATUS AND IMAGE FORMING APPARATUS - The present invention provides a sheet feeding apparatus including a sheet stacking portion, a feeding roller, a biasing member, and a cam member, wherein a predetermined idling section in which the feeding roller does not work with rotation of the feeding shaft is provided between the feeding roller and the feeding shaft, the sheet feeding apparatus comprises a returning mechanism which returns the feeding roller to the initial feeding position after the feeding roller finishes feeding the sheet on the sheet stacking portion, and when a sheet feeding operation is started, at a time when the cam member starts rotating together with the feeding shaft and passes the idling section, the feeding roller starts rotating, feeds out the sheet on the sheet stacking portion and then is returned to the initial feeding position by the returning mechanism. | 12-29-2011 |
| 20130026700 | RETARD ROLLER AND RETARD ROLLER MODULE HAVING SUCH RETARD ROLLER - A retard roller and a retard roller module are provided. The retard roller is used in an automatic document feeder for providing a frictional force to separate plural documents from each other. Unidirectional rotation of the retard roller is permitted. Due to the unidirectional rotation, the contact surface of the retard roller can be switched. During the sheet-feeding process, the document is contacted with a specified contact surface. By rotating the retard roller, the document is contacted with another contact surface. | 01-31-2013 |
| 20130320611 | SHEET CONVEYING DEVICE, IMAGE READING DEVICE, AND IMAGE FORMING APPARATUS - A sheet conveying device such as a feed mechanism includes a pick-up roller and a cover member. The pick-up roller feeds, into an apparatus, a sheet such as a document on a placing table such as a document placing table on which the sheet is placed. The cover member such as a pick-up cover covers the pick-up roller. The cover member is supported at both ends thereof on a shaft of the pick-up roller or on shaft bearings that receive the shaft of the pick-up roller. | 12-05-2013 |
| 20140183813 | SHEET FEEDER AND IMAGE FORMING APPARATUS INCORPORATING SAME - A sheet feeder, which is included in an image forming apparatus, includes a sheet bypass member openably closable to one side surface of a body of the image forming apparatus, a pickup roller to feed and convey a sheet loaded on the sheet bypass member, and an arm to hold the pickup roller and to open and close with the pickup roller. The arm includes a contact portion extending in a shape of projection toward an upstream side from the pickup roller in a sheet conveying direction of the sheet bypass member. As the sheet bypass member is rotated upward to be closed and stored to the side surface of the body, the contact portion of the arm contacts the sheet bypass member to rotate the arm upward to cause the sheet bypass member to approach to the side surface of the body. | 07-03-2014 |
| 20190144223 | SHEET CONVEYING DEVICE AND IMAGE FORMING APPARATUS | 05-16-2019 |
| 271115000 | In oscillatory movement | 1 |
| 20110316223 | SHEET FEEDING APPARATUS AND IMAGE FORMING APPARATUS - At a start of sheet feeding operation, a feed cam starts to rotate in association with rotation of a feed shaft and a feed roller starts to rotate from a time when the feed shaft has passed an idle zone, so as to send out each of sheets on a rising and lowering plate. After that, the feed roller is returned to a feed initial position by a return mechanism including a conveyance roller and a feed rotatable member. A cam curve of the feed cam reduces a rising speed as compared to a rising speed of a conventional rising and lowering plate, and reduces generation of noise at the time of collision between the sheets on the rising and lowering plate and the feed rotatable member. Thus, an image forming apparatus having lower noise level can be provided. | 12-29-2011 |
