| Patent application number | Description | Published |
|---|
| 20080237968 | SHEET SUPPLYING DEVICE AND IMAGE FORMING APPARATUS - A sheet supplying device which supplies a sheet, including: a sheet supplying tray which stacks a bundle of sheets; a first air blowing section which blows air against a side of the bundle of sheets stacked on the sheet supplying tray; a second air blowing section which blows air from downstream of the bundle of sheets in a sheet conveyance direction, onto a leading section of the sheets; a vacuum conveyance section which vacuums an uppermost sheet of the bundle of sheets and conveys the sheets one by one; a shielding member which shields air blown from the first air blowing section; a vacuum detection sensor which detects that a sheet has been vacuumed by the vacuum conveyance section; and a control section which controls the shielding member to open so that air generated by the first air blowing section is blown to the bundle of sheets. | 10-02-2008 |
| 20090085275 | IMAGE FORMING APPARATUS - An image forming apparatus includes: a common conveyance path through which a sheet fed from a sheet feed tray is conveyed from a registration roller to a transfer section; a direct conveyance path through which the sheet is directly fed from the sheet feed tray to the common conveyance path; a delay conveyance path in which the sheet after being branched from the direct conveyance path is joined to the common conveyance path, and is caused to delay in being fed from the sheet feed tray to the common sheet conveyance path; a conveyance section which conveys the sheet fed from the sheet feed tray to the transfer section; and a controller which controls the conveyance section to convey once the sheet fed from the sheet feed tray from the direct conveyance path to the delay conveyance path, and thereafter to convey to the common conveyance path. | 04-02-2009 |
| 20090236795 | SHEET FEEDING APPARATUS, HOUSING INCORPORATING THE SAME AND IMAGE FORMING APPARATUS - A sheet feeding apparatus including a sheet tray for storing a plurality of sheets of paper, the sheet tray capable of being pulled out in a direction perpendicular to a sheet feed direction; a pair of side regulating members for regulating both lateral surfaces of the sheets, the regulating members being provided over the sheet tray and perpendicular to the sheet feed direction; a vacuum type belt to suck a sheet of paper from above and feed the sheets; and a moving mechanism for moving one of the belt and one of the regulating members that is provided on a back side in the direction of pulling out the sheet tray in the vertical directions, in such a way that, when the sheet tray is pulled out, the uppermost end of the regulating member is lower than the lowermost surface of the vacuum type belt. | 09-24-2009 |
| 20090243191 | SHEET FEEDING DEVICE - As a guide member provided on a conveyance path through which a sheet is conveyed toward a separation device, a guide member having a sloping guide surface is used, and the aforesaid guide member is arranged so that an uppermost stream point of the sloping guide surface may be positioned at the upstream side of a separation point of the aforesaid separation device and a lowermost stream point of the aforesaid guide surface may be positioned at the downstream side of the aforesaid separation point. | 10-01-2009 |
| 20100129127 | SHEET SUPPLY APPARATUS, SHEET SUPPLY UNIT AND IMAGE FORMING APPARATUS - An sheet supply apparatus is provided which controls vertical movement of a sheet support tray so that a position of an upper surface of stacked sheets on the support tray is adjusted to a height located below a separation air outlet, wherein adsorption is possible at the height and so that a fall region, in which a pressure difference with respect to a separation region is generated, is formed below the separation region in which the separation air blasted from the separation air outlet is blasted along the sheet adsorbed on the adsorbent surface. | 05-27-2010 |
| 20100148419 | SHEET SUPPLY APPARATUS, SHEET SUPPLY UNIT AND IMAGE FORMING APPARATUS - A sheet supply apparatus including: a suction conveyance mechanism which suctions a topmost sheet of a plurality of sheets stacked and conveys the suctioned sheet to a sheet conveyance path; an outlet elevation mechanism which moves an air outlet to and from a first position at which the air outlet faces the side of the stacked sheets and a second position at which the air outlet faces a side of the sheet suctioned onto the suction surface; a suction detection sensor; a sheet supply detection sensor; and a control section which moves the air outlet to the first position or to the second position by controlling the outlet elevation mechanism based on detections by the sensors. | 06-17-2010 |
| 20100181716 | SHEET SUPPLY APPARATUS - A sheet supply apparatus includes: an endless belt which has a plurality of vents penetrating from a front surface to a rear surface and is stretched around a plurality of rollers including a drive roller and driven by the drive roller; a suction section having a suction port which suctions air and faces to a rear surface of the belt, wherein the sheet supply apparatus suctions a sheet to the front surface of the belt through vents of the belt facing to the suction port and carries the sheet, and the sheet supply apparatus further includes a guide member which guides a leading edge of the sheet being conveyed to a down stream side of the suction port in a conveyance direction, in a direction separating from the front surface of the belt. | 07-22-2010 |
| 20100209163 | SHEET FEEDING DEVICE AND IMAGE FORMING APPARATUS - A sheet feeding device including: a sheet feeding tray; a first air blowing section which blows air against a lateral side of the sheet bundle; a second air blowing section which blows air against a leading edge of the sheet bundle; a sheet adsorption conveyance section which conveys sheets one by one; a sheet type information transmission section; a shielding member arranged to open or shield the ventilating path; a shielding state switching section which switches to any one state of opening, partial shielding and overall shielding, wherein in the partial shielding state, less amount of air is allowed to pass than the opening state; a sheet adsorption detecting section; and a control section which controls to switch among the state of opening, partial shielding and overall shielding of the ventilating path, in accordance with the information from the sheet type and the sheet adsorption detection. | 08-19-2010 |
| 20100264577 | SHEET FEEDING APPARATUS AND IMAGE FORMING APPARATUS - A sheet feeding apparatus which includes a sheet loading tray for stacking sheets; a suction and conveyance section which is placed above stacked sheets on the sheet loading tray and sucks and conveys a sheet in the sheet conveying direction; an air blowing section which blows air at the stacked sheets on the sheet loading tray and causes the sheet to float up; and a skew correction section which corrects a skew of the sheet conveyed by the suction and conveyance section. | 10-21-2010 |
| 20100295238 | SHEET-SUPPLYING DEVICE, IMAGE FORMING APPARATUS AND IMAGE FORMING SYSTEM USING THE SAME DEVICE - A sheet-supplying device, including: a sheet stacking plate on which plural sheets are stacked; an air-suction sheet conveying mechanism which draws up a sheet and conveys the sheet; an air-suction detecting sensor which detects that the air-suction sheet conveying mechanism has drawn up the sheet;
| 11-25-2010 |
| 20110140344 | SHEET FEEDING APPARATUS AND IMAGE FORMING SYSTEM - A sheet feeding apparatus including: a sheet loading table; and an adsorption conveyance section having: multiple belts with through-holes; and an air suction section in an inside of the belts and absorbs air through the through-holes; wherein the conveyance section sucks air, allows the sheet to be adsorbed to the belt, and conveys it; the adsorption conveyance section further includes: a first roller provides driving force to the belts; a second roller rotated by the belts, and a third roller between the first roller and the second roller and rotated by the belts, and the belts are supported by those rollers; and an outer surface of the belts mostly protrudes towards the sheets on the table at a central part of the third roller in a cross section perpendicular to the conveyance direction containing a shaft of the third roller. | 06-16-2011 |
| 20110140345 | SHEET FEEDING APPARATUS AND IMAGE FORMING APPARATUS - A sheet feeding apparatus is constituted from a sheet loading section having a raising and lowering plate, sheet side surface regulating members that regulate side surfaces of sheets, and an air blowing section that blows air towards the side surface of sheets in a top part, a sheet suction and conveying section, a reflection type sensor which detects the upper limit position of the sheets in the sheet loading section, a control section which, when an output of the reflection type sensor becomes an output indicating the state between the sheets that are put in the floating state due to the air flow blown out from an air blowing section and the sheets that are maintaining the stacked state, carries out control so as to raise the raising and lowering plate. | 06-16-2011 |
| 20110163491 | SHEET FEEDING APPARATUS AND IMAGE FORMING SYSTEM - A high productivity sheet feeding apparatus in which there is no occurrence of abnormalities related to sheet feeding irrespective of the size and type of sheet, and an image forming system having that sheet feeding apparatus are provided. This sheet feeding apparatus has the feature that it has, a stacking unit for stacking sheets, a conveying unit that is placed above and spaced from said stacking unit and that conveys the sheets, a flotation unit that makes the sheets in the upper part of the sheets stacked in said stacking unit float up towards said conveying unit, and a suction unit that sucks the air included in between the plurality of sheets that have been made to float up towards said conveying unit by said flotation unit. | 07-07-2011 |
