Patent application number | Description | Published |
20080232880 | Sheet conveying device and image forming apparatus - A sheet conveying device includes a pair of upstream rollers and a pair of downstream rollers each including a drive roller and a driven roller, a calculating unit, and a control unit. The upstream rollers include a measuring unit that obtains speed information of the upstream rollers. The calculating unit calculates a target value based on the speed information. The control unit controls the speed of the drive roller of the downstream rollers based on the target value. | 09-25-2008 |
20080303202 | SHEET CONVEYING DEVICE AND IMAGE FORMING APPARATUS - A fluctuation detecting unit detects a fluctuation of an endless belt generated when a sheet is brought into contact with a predetermined position of the endless belt at an upstream side in a conveying direction from a nip portion based on fluctuation information acquired by a fluctuation information acquiring unit. An entry timing estimating unit estimates entry timing of the sheet into the nip portion based on a detection of the fluctuation. A correction control unit corrects a speed fluctuation of the endless belt generated when the sheet enters the nip portion by performing a feedforward control of a first driving unit based on the entry timing. | 12-11-2008 |
20090060613 | Image transfer apparatus, image fixing apparatus, and registration apparatus - A load torque variation upon entry or exit of a sheet into a nipping portion is reduced while a nipping force necessary for image formation is provided. An image transfer apparatus, an image fixing apparatus, or a registration apparatus comprises an opposite roller, a transfer roller, and a compression spring for pressing the opposite roller onto the transfer roller. A sheet of transfer material is transported into a nipping portion between the opposite roller and the transfer roller, where an image on the opposite roller is transferred to the transfer material. The apparatus includes a retaining unit configured to retain a certain distance between the first rotating body and the second rotating body as long as the thickness of the transfer material that passes through the nipping portion remains the same. | 03-05-2009 |
20090116860 | Image forming device - An image forming device is disclosed that is able to enlarge a gap of a nipping portion with a simple and inexpensive structure, and able to reduce impact when a front end of a recording sheet runs into or a back end of the recording sheet passes through the nipping portion. The image forming device includes an image carrying unit, an image forming unit, a transfer unit, a conveyance unit, a determination unit that determines whether a thickness of the recording sheet is greater than a threshold value, and a cam member that rotates to enlarge or reduce the gap of the nipping portion between the image carrying unit and the transfer unit according to rotational positions of the cam member. When the thickness of the recording sheet is greater than the threshold, the cam member rotates so that the gap of the nipping portion is enlarged. | 05-07-2009 |
20090162118 | Driving apparatus and image forming apparatus - A driving apparatus includes a driving unit, a driven unit driven by the driving unit, a driving control unit configured to control the driving unit by performing feed-forward control based on feed-forward target data determined in advance to reduce a speed change of the driven unit. The speed change of the driven unit is expressed substantially as a positive half cycle of a sinusoidal waveform having an amplitude and a time duration, and the feed-forward target data is calculated from the amplitude and the time duration to represent a rectangular waveform approximating the positive half cycle of the sinusoidal waveform. | 06-25-2009 |
20090207461 | Image forming apparatus - In an image forming apparatus, a distance adjusting unit adjusts an inter-unit distance between a contact unit and an image carrier by moving the image carrier or the contact unit by applying an opposing force to the image carrier or the contact unit against a biasing force applied by a biasing unit based on thickness information of a recording sheet acquired by a thickness-information acquiring unit and data indicating a relationship between the thickness information and an inter-unit distance change amount stored in a data storage unit. | 08-20-2009 |
20090212488 | Sheet conveying device and image forming apparatus - A sheet conveying device includes a torque estimation unit that, based upon a first load torque generated at a time that a sheet-like member passes through a first nip between a first driving roller and a first driven roller of an upstream sheet conveying unit, estimates a second load torque generated at a time that the sheet-like member passes through a second nip between a second driving roller and a second driven roller of a downstream sheet conveying unit; and a control unit that controls the driving torque such that the second load torque is counterbalanced by applying a counterbalancing torque in synchronization with a timing of entry of the sheet-like member into the second nip. | 08-27-2009 |
20090212491 | Sheet conveying device and image forming apparatus - A second rotary member is arranged opposite to a first rotary member to form a nip between them. A driving unit drives the first rotary member. A sheet-width measuring unit measures a width of a sheet to be fed into the nip. A speed compensating unit compensates a fluctuation of a rotation speed of the first rotary member occurring when the sheet is fed into the nip. The speed compensating unit adjusts a compensation target value for compensating the fluctuation of the rotation speed of the first rotary member based on the width of the sheet measured by the sheet-width measuring unit. | 08-27-2009 |
20090220277 | Image forming apparatus - An image-carrier driving unit drives an image carrier. An image forming unit forms an image on the image carrier. A moving-member driving unit drives a moving member that is movable towards and away from the image carrier. A detecting unit detects a position of the moving member at predetermined sampling times while the moving member is moving. A movement control unit performs a feedback control on the moving-member driving unit such that a detection result of the detecting unit follows a target value corresponding to each of the predetermined sampling times when the moving member moves while the image forming unit is forming the image on the image carrier. | 09-03-2009 |
20100046991 | Image forming apparatus - An image forming apparatus includes an image transfer belt, a first pressure member, a second pressure member, and an adjustable tension member. The image transfer belt is trained around multiple rollers for rotation along an endless belt travel path to convey an image for transfer to a recording sheet. The first pressure member is disposed on an outer surface of the image transfer belt. The second pressure member is disposed on an inner surface of the image transfer belt opposite the first pressure member. The first and second pressure members define an image transfer gap therebetween. The adjustable tension member is disposed on the image transfer belt adjacent the image transfer gap to adjust tension on the image transfer belt when the recording sheet enters and exits the image transfer gap. | 02-25-2010 |
20100054781 | Transfer device and image forming apparatus - A transfer roller lies opposite to a supporting roller across an image carrying belt and abuts against the outer surface of the image carrying belt to form a transfer nip. A driving force transmission unit transmits driving force from a driving source to a driving roller. A drive control unit performs drive control of the driving source. A feedforward control unit performs feedforward control on the driving source via the drive control unit. An entry detecting unit detects entry of a sheet in the transfer nip. The feedforward control unit considers an entry detection signal output by the entry sensor as a trigger for performing feedforward control after a predetermined time. | 03-04-2010 |
20110110156 | SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME - There is provided a technology which can allow a semiconductor chip formed with a nonvolatile memory to be sufficiently reduced in size. There is also provided a technology which can ensure the reliability of the nonvolatile memory. In a memory cell of the present invention, a boost gate electrode is formed over a control gate electrode via an insulating film. The boost gate electrode has the function of boosting a voltage applied to a memory gate electrode through capacitive coupling between the boost gate electrode and the memory gate electrode. That is, during a write operation or an erase operation to the memory cell, a high voltage is applied to the memory gate electrode and, to apply the high voltage to the memory gate electrode, the capacitive coupling using the boost gate electrode is subsidiarily used in the present invention. | 05-12-2011 |
20120132978 | SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD OF SEMICONDUCTOR DEVICE - A semiconductor device with a nonvolatile memory is provided which has improved characteristics. The semiconductor device includes a control gate electrode, a memory gate electrode disposed adjacent to the control gate electrode, a first insulating film, and a second insulating film including therein a charge storing portion. Among these components, the memory gate electrode is formed of a silicon film including a first silicon region positioned over the second insulating film, and a second silicon region positioned above the first silicon region. The second silicon region contains p-type impurities, and the concentration of p-type impurities of the first silicon region is lower than that of the p-type impurities of the second silicon region. | 05-31-2012 |
20120155944 | BOOKBINDING SYSTEM USING UNFIXED TONER IMAGE AS ADHESIVE - A bookbinding system includes an image forming unit to form a toner image on a sheet; a fixing device to fix the toner image onto the sheet; a sheet stacker to load sheets passing through the fixing device, to create a sheet bundle, in which the sheet bundle stacked on the sheet stacker is adhered to produce a complete book; an adhesive toner image forming unit to form an adhesive toner image on an area corresponding to a spine of the complete book; and a heater to heat the unfixed adhesive toner image formed on each sheet of the sheet bundle stacked on the sheet stacker, wherein the adhesive toner image on the sheet stacked on the sheet stacker is the unfixed toner image. | 06-21-2012 |
20120163846 | Image Formation Apparatus, Driving Control Method, And Computer Program Product - An image formation apparatus includes an image carrier; a driving source generating a driving force for the image carrier; a drive transmission unit; a driving control unit controlling the driving source; an image formation unit forming an image on a surface of the image carrier; a transfer nip between a transfer member and the surface of the image carrier; a driving-force exerting unit exerting a driving force on any one of the image carrier and a first drive transmission member on a drive transmission path, and a specific drive transmission member imparting weakest spring characteristics among drive transmission members to a drive transmission system; a detecting unit detecting an estimation parameter used in estimating a driving-load-torque variation amount of the image carrier; a torque-variation-amount estimation unit; and a driving-force control unit controlling the driving force to cancel the driving-load-torque variation. | 06-28-2012 |
20130051886 | SHEET BINDING DEVICE AND IMAGE FORMING APPARATUS INCORPORATING SAME - An image forming apparatus includes an image forming unit to form an adhesive toner pattern in a predetermined bonding range of a sheet, outside a printable range in which an image according to image data is formed, a stacking unit to stack multiple sheets one on top of another, and a sheet binding device that includes a fusing device to fuse and fix the adhesive toner pattern formed on the multiple sheets to bind the multiple sheets together, and a bonding strength setting unit to determine, in accordance with a desired bonding strength, at least one of a number of color toners used for forming the adhesive toner pattern, a bonding manner, a number of pixels of the adhesive toner pattern, a toner area ratio of the adhesive toner pattern, and a layer thickness of the adhesive toner pattern. | 02-28-2013 |
20140072388 | SHEET POST-PROCESSING APPARATUS, IMAGE FORMING SYSTEM, AND SHEET BINDING METHOD - A sheet post-processing apparatus includes: a binding unit that binds, as a bundle, a plurality of sheets by heating and pressing binding margin portions of the sheets set in advance, using toner interposed between the sheets as an adhesive material; and a pre-heating unit that heats the binding margin portions of the sheets while the sheets are stacked. | 03-13-2014 |
20140209996 | SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD OF SEMICONDUCTOR DEVICE - A semiconductor device with a nonvolatile memory is provided which has improved characteristics. The semiconductor device includes a control gate electrode, a memory gate electrode disposed adjacent to the control gate electrode, a first insulating film, and a second insulating film including therein a charge storing portion. Among these components, the memory gate electrode is formed of a silicon film including a first silicon region positioned over the second insulating film, and a second silicon region positioned above the first silicon region. The second silicon region contains p-type impurities, and the concentration of p-type impurities of the first silicon region is lower than that of the p-type impurities of the second silicon region. | 07-31-2014 |
20140242796 | METHOD OF MANUFACTURING SEMICONDUCTOR DEVICE - To improve a semiconductor device having a nonvolatile memory. a first MISFET, a second MISFET, and a memory cell are formed, and a stopper film made of a silicon oxide film is formed thereover. Then, over the stopper film, a stress application film made of a silicon nitride film is formed, and the stress application film over the second MISFET and the memory cell is removed. Thereafter, heat treatment is performed to apply a stress to the first MISFET. Thus, a SMT is not applied to each of elements, but is applied selectively. This can reduce the degree of degradation of the second MISFET due to H (hydrogen) in the silicon nitride film forming the stress application film. This can also reduce the degree of degradation of the characteristics of the memory cell due to the H (hydrogen) in the silicon nitride film forming the stress application film. | 08-28-2014 |