Patent application number | Description | Published |
20080251999 | IMAGE FORMING APPARATUS - An image forming apparatus includes a first detecting portion having an abutting portion arranged so as to abut the top surface of sheets on a sheet tray and outputs a signal for determining the presence or absence of the sheets, and a second detecting portion having an abutting portion arranged so as to abut the top surface of the sheets and outputs a signal which determines according to the position of the abutting portion whether the position of the top surface of the blown up sheets is located in a predetermined position. During the sheet feeding operation, the signal which determines that the sheets are absent is input from the first detecting portion to a controller and the signal determining that the top surface of the sheets is located in a predetermined position is not input from the second detecting portion, the controller does not determine that the sheets are absent. | 10-16-2008 |
20080258372 | SHEET PROCESSING APPARATUS AND IMAGE FORMING SYSTEM - A sheet processing apparatus includes a winding unit configured to wind a continuous sheet, a binding unit configured to bind the continuous sheet that is wound and stacked by the winding unit, and a first cutting unit configured to cut the continuous sheet that is bound by the binding unit in a state that the continuous sheet is wound by the winding unit. | 10-23-2008 |
20090295081 | SHEET CONVEYING APPARATUS AND IMAGE FORMING APPARATUS - The present invention provides a sheet conveying apparatus and an image forming apparatus having the same, in which a jammed sheet can be easily viewed and easily removed. | 12-03-2009 |
20100183350 | SHEET FEEDING DEVICE AND IMAGE FORMING APPARATUS - A sheet feeding device includes a sheet accommodating unit supported by an apparatus main body in an insertable and withdrawable manner in a direction orthogonal to a feeding direction of the sheets, a leading edge regulating unit provided fixedly to the sheet accommodating unit, a trailing edge regulating unit provided in the sheet accommodating unit, a side edge regulating unit provided in the sheet accommodating unit, and an insertion position limiting unit configured to contact a frame on a rear of the apparatus main body in an inserting direction of the sheet accommodating unit to limit an insertion position of the sheet accommodating unit, wherein the insertion position limiting unit is arranged on a rear of the sheet accommodating unit and on an upstream of a position of center of gravity of the sheet accommodating unit along a sheet feeding direction. | 07-22-2010 |
20100187746 | IMAGE FORMING APPARATUS - An image forming apparatus includes a sheet storage unit, a sheet feeding unit, a conveyance path for conveying a sheet to the image forming unit, a plurality of sheet detection sensors disposed along the conveyance path, a determination unit for determining whether predetermined time elapses from a detection of a front end of the sheet until a detection of a rear end of the sheet and a discharge unit. When the determination unit determines that the predetermined time has elapsed based on the detection by the sheet detection sensor disposed in the furthest upstream position among the plurality of sheet detection sensors, the sheet is discharged from the discharge unit, and when the determination unit determines that the predetermined time has elapsed based on the detection by the sheet detection sensors other than that disposed in the furthest upstream position, the sheet is stopped. | 07-29-2010 |
20100187747 | SHEET FEEDING APPARATUS AND IMAGE FORMING SYSTEM - A sheet feeding apparatus includes a sheet stacking unit, a suction conveyance unit configured to convey an uppermost sheet stacked on the sheet stacking unit, a suction unit configured to adsorb the sheets onto the suction conveyance unit, and an adsorption completion detection unit. In the sheet feeding apparatus, when the tab-attached sheets are stacked on the sheet stacking unit and fed such that their tab portions are on the downstream side in a sheet feeding direction, the suction unit starts to adsorb the sheet in response to a sheet feeding signal, and the suction conveyance unit starts to convey the sheet immediately after the adsorption completion detection unit detects the completion of the adsorption. When the sheets other than the tab-attached sheets are fed, the suction unit previously adsorbs the sheet onto the suction conveyance unit, and the suction conveyance unit starts to convey the sheet in response to the sheet feeding signal. | 07-29-2010 |
20100194031 | IMAGE FORMING APPARATUS - Even if a sheet surface detection mechanism outputs a signal indicating that an uppermost sheet among blown-up sheets is within a conveyance range, if a trailing edge sheet surface sensor outputs a signal indicating that the uppermost sheet among the blown-up sheets is lower than the conveyance range when the conveyed uppermost sheet passes by the trailing edge sheet surface sensor, a lifting and lowering portion is controlled to lift the tray so that the uppermost sheet is positioned within the conveyance range. | 08-05-2010 |
20130134651 | SHEET FEEDING APPARATUS AND IMAGE FORMING SYSTEM - A sheet feeding apparatus includes a sheet stacking unit, a suction conveyance unit configured to convey an uppermost sheet stacked on the sheet stacking unit, a suction unit configured to adsorb the sheets onto the suction conveyance unit, and an adsorption completion detection unit. In the sheet feeding apparatus, when the tab-attached sheets are stacked on the sheet stacking unit and fed such that their tab portions are on the downstream side in a sheet feeding direction, the suction unit starts to adsorb the sheet and the suction conveyance unit starts to convey the sheet immediately after the adsorption completion detection unit detects the completion of the adsorption. When the sheets other than the tab-attached sheets are fed, the suction unit previously adsorbs the sheet onto the suction conveyance unit, and the suction conveyance unit starts to convey the sheet in response to the sheet feeding signal. | 05-30-2013 |