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 |
20110198797 | 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. | 08-18-2011 |
20110198798 | 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. | 08-18-2011 |
20110254217 | SHEET FEEDING APPARATUS AND IMAGE FORMING APPARATUS - A sheet feeding apparatus includes: a loading platen on which sheets are loaded, an air blowing section which blows air to sides of a loaded sheet bundle loaded on the loading platen, and an adsorption/conveyance mechanism which adsorbs and conveys a sheet, a driving section moving the loading platen up and down, wherein the air blowing section includes a plurality of air blowing openings facing both sides of the loaded sheet bundle and blowing air to the both sides, wherein each of the plurality of air blowing openings is formed so that a first air flow flows above the loading platen and a second air flow flows below the loading platen when the loading platen reaches a highest position by the driving section, and wherein the loading platen is provided with a penetration thorough which the second air flow flows from below to above the loading platen. | 10-20-2011 |
20120074639 | 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 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; a skew correction section which is provided with a pair of conveyance rollers, and corrects a skew of the sheet being conveyed by the suction and conveyance section; and a control section which controls a force of sucking the sheet, wherein the control section changes the force of sucking the sheet from a first level to a second level that is lower than the first level, before a leading edge of the sheet butts against a pair of conveyance rollers of the skew correction section. | 03-29-2012 |
20120161384 | AIR SHEET FEEDING DEVICE AND IMAGE FORMING SYSTEM HAVING IMAGE FORMING APPARATUS TO WHICH THE AIR SHEET FEEDING DEVICE IS CONNECTED - A sheet feeding device includes: a leading edge contacting section having a leading edge contacting surface with which a leading edge side in a sheet conveyance direction of sheets stored in a sheet storage section, comes in contact; a blowing section having an air outlet which blows air to float the sheets from a side surface perpendicular to the conveyance direction of the sheets stored; a sucking and conveying section provided at an upward position over the sheet storing section, which sucks the sheet floated by the air from the blowing section, and conveys the sheet over an upper end of the leading edge contacting section; and a rise prevention member provided on a side of the sucking and conveying section, which comes in contact with the sheet floated by the air from the blowing section and prevents a contacting portion of the floated sheet from being risen. | 06-28-2012 |
20130279952 | FOIL TRANSFERRING APPARATUS AND IMAGE FORMING SYSTEM USING THE SAME - A second thermal transfer portion of upstream side transfers a foil image, to be not printed, from the foil sheet on a waste sheet, conveyed from an image forming apparatus, on which a desired negative toner image is transferred. The foil image, to be printed, remains on the transferred foil sheet. The waste sheet is ejected out of a foil transferring apparatus. A printing sheet of paper on which the desired positive toner image is transferred is conveyed from the image forming apparatus to a first thermal transfer portion of downstream side to meet time when the foil sheet on which the foil image, to be printed, remains reaches the first thermal transfer portion. The first thermal transfer portion transfers the foil image, to be printed, from the foil sheet on the conveyed printing sheet of paper on which the desired positive toner image is transferred. | 10-24-2013 |
20130287455 | FOIL TRANSFERRING APPARATUS AND IMAGE FORMING SYSTEM USING THE SAME - In a first thermal transfer portion of upstream side, a negative toner image forming portion forms on a photosensitive drum a desired negative toner image which reverses a desired positive toner image selected from all the toner images. The negative toner image forming portion then forms the desired negative toner image on a belt member. The first thermal transfer portion transfers a desired negative foil image from a foil sheet to the belt member so that a desired positive foil image remains on the foil sheet. A second transfer portion transfers the desired positive foil image thus remained on the desired positive toner image formed on the sheet of paper. A cleaning portion removes the desired negative toner image and the desired negative foil image from the belt member. | 10-31-2013 |
20130308992 | IMAGE FORMING SYSTEM - An image forming apparatus transfers a negative toner image on a waste sheet of paper having larger size than that of a printing sheet of paper and transfers all the toner images on the printing sheet of paper. A first thermal transferring portion transfers an unnecessary foil of a foil sheet on the negative toner image of the waste sheet of paper image. A second thermal transferring portion transfers a foil remained on the foil sheet on the positive toner image of the printing sheet of paper. The positive toner image is formed using transparent toner. Any gradation processing is performed on an edge of the positive toner image. | 11-21-2013 |