Abstract: A sheet conveying device includes an auxiliary tray, a sheet feeding tray, a roller, a driving mechanism, and a pickup roller. The sheet feeding tray is adjacent to the auxiliary tray on a lateral side of the auxiliary tray. The roller is configured to move in a thickness direction of a sheet bundle placed on the auxiliary tray to contact an end of the sheet bundle facing the sheet feeding tray. The driving mechanism is configured to laterally move the auxiliary tray to be on top of the sheet feeding tray when the sheet bundle placed on the auxiliary tray is transferred to the sheet feeding tray. The pickup roller is configured to pick up a sheet one by one from the sheet bundle transferred to the sheet feeding tray.

Abstract: A sheet conveying apparatus includes a paper re-feeding path, a switching member, a reversing roller, a paper discharge roller, a motor, and a revolution control mechanism. The switching member can be switched between a first position and a second position. The reversing roller can reverse a revolving direction thereof between a first revolving direction and a second revolving direction. The paper discharge roller revolves in a third revolving direction for conveying the sheet in a third conveying direction. The motor reverses the revolving direction of the reversing roller and switches the position of switching member by reversing the revolving direction thereof. The revolution control mechanism revolves the paper discharge roller in the third revolving direction with the revolution of the motor, regardless of the reversing of the revolving direction of the motor.

Abstract: A sheet conveying device includes an auxiliary tray, a sheet feeding tray, a roller, a driving mechanism, and a pickup roller. The sheet feeding tray is adjacent to the auxiliary tray on a lateral side of the auxiliary tray. The roller is configured to move in a thickness direction of a sheet bundle placed on the auxiliary tray to contact an end of the sheet bundle facing the sheet feeding tray. The driving mechanism is configured to laterally move the auxiliary tray to be on top of the sheet feeding tray when the sheet bundle placed on the auxiliary tray is transferred to the sheet feeding tray. The pickup roller is configured to pick up a sheet one by one from the sheet bundle transferred to the sheet feeding tray.

Abstract: A sheet conveying apparatus includes a paper re-feeding path, a switching member, a reversing roller, a paper discharge roller, a motor, and a revolution control mechanism. The switching member can be switched between a first position and a second position. The reversing roller can reverse a revolving direction thereof between a first revolving direction and a second revolving direction. The paper discharge roller revolves in a third revolving direction for conveying the sheet in a third conveying direction. The motor reverses the revolving direction of the reversing roller and switches the position of switching member by reversing the revolving direction thereof. The revolution control mechanism revolves the paper discharge roller in the third revolving direction with the revolution of the motor, regardless of the reversing of the revolving direction of the motor.

Abstract: According to one embodiment, there is provided an image processing apparatus including a reading unit and a determining unit. The reading unit generates sheet image data indicating image data of a sheet. The determining unit determines, on the basis of a degree of gradation in the sheet image data generated by the reading unit, whether a planar object adheres on the sheet read by the reading unit.

Abstract: According to one embodiment, there is provided an image processing apparatus including a reading unit and a determining unit. The reading unit generates sheet image data indicating image data of a sheet. The determining unit determines, on the basis of a degree of gradation in the sheet image data generated by the reading unit, whether a planar object adheres on the sheet read by the reading unit.

Abstract: According to one embodiment, there is provided an image processing apparatus including a reading unit and a determining unit. The reading unit generates sheet image data indicating image data of a sheet. The determining unit determines, on the basis of a degree of gradation in the sheet image data generated by the reading unit, whether a planar object adheres on the sheet read by the reading unit.

Abstract: In accordance with one embodiment, an image forming apparatus comprises a paper pickup section configured to pick up paper from a cassette; a calculating section configured to measure the time from the moment the paper is picked up to the moment the conveyance of the paper is detected by a sensor arranged at a given distance away from the paper pickup section, to calculate a delay time with respect to a specified time; and a control section configured to count the number of times the calculated delay time exceeds a delay time stored in a storage section in which a plurality of delay times different in length are stored, and output message information different from each other according to the length of the calculated delay time and the counted times when a plurality of paper is fed.

Abstract: A heat insulation roller of an image forming apparatus of the present invention arranges hollow pipes between a core roller and an outer peripheral roller and obtains a high heat insulating effect though it is light in weight and inexpensive. Further, the core roller and hollow pipes are inserted into the outer peripheral roller before pipe extension, and the outer peripheral roller is extended, and the hollow pipes are uniformly adhered and fixed between the core roller and the outer peripheral roller, and then the ends of the outer peripheral roller and hollow pipes are removed, thus the core roller can be secondarily worked easily.

Abstract: A fixing device of the present invention supports rotatably a fixing belt heated by a heating member using a separation roller having hollow pipes arranged between a core roller and an outer peripheral roller and producing a high heat insulating effect though it is light in weight and inexpensive and prevents the fixing belt from falling in temperature due to the separation roller.

Abstract: A fixing device of the present invention supports rotatably a fixing belt heated by a heating member using a separation roller having hollow pipes arranged between a core roller and an outer peripheral roller and producing a high heat insulating effect though it is light in weight and inexpensive and prevents the fixing belt from falling in temperature due to the separation roller.

Abstract: A heat insulation roller of an image forming apparatus of the present invention arranges hollow pipes between a core roller and an outer peripheral roller and obtains a high heat insulating effect though it is light in weight and inexpensive. Further, the core roller and hollow pipes are inserted into the outer peripheral roller before pipe extension, and the outer peripheral roller is extended, and the hollow pipes are uniformly adhered and fixed between the core roller and the outer peripheral roller, and then the ends of the outer peripheral roller and hollow pipes are removed, thus the core roller can be secondarily worked easily.

Abstract: An ink-jet printer includes a rotary drum 10 for rotating at a constant speed, a sheet loader for loading a paper sheet onto the rotary drum 10, a sheet holding system 20 for holding the paper sheet loaded by the sheet loader on the rotary drum 10, and a print head 200 for printing an image by ejecting ink onto the paper sheet which is held on the rotary drum 10 by the sheet holding system 20 and rotated together with the rotary drum 10. In particular, the sheet loader has a pair of loading rollers 91 and 92 for feeding the paper sheet while pinching the paper sheet, and a roller moving mechanism 28 for separating the loading roller 91 from the other loading roller 92 to release the paper sheet after the leading edge of the paper sheet has been held on the rotary drum 10.

Abstract: An ink jet printer includes a rotary drum having a peripheral surface for holding a paper sheet, a print head for printing an image on the paper sheet held on the peripheral surface by jetting ink to the paper sheet, and an elevator mechanism for setting the print head to a printing position close to the peripheral surfice at a time of printing and to a non-printing position farther from the peripheral surface than the printing position along a normal line of the peripheral surface at a time of maintenance. Particularly, the elevator mechanism includes a pair of guide rails set parallel to the normal line of the peripheral surface, a slider unit rotatably holding the print head and slidably attached to the guide rails, and a driving section for moving the slider unit up and down.

Abstract: Suction ports (14) are provided in one end (15R) of a drum (10), connecting the interior (16) and exterior of the drum (10). Corresponding suction ports (34) are provided at a stationary side (5R), opposing the suction ports (14), respectively. A suction fan (32) is provided, which draws air from the interior (16) of the rotating drum (10) through the corresponding suction ports (34) and the suction ports (14). A printing medium M can be attracted and held onto the outer circumferential surface (11) of the drum (10) by virtue of negative pressure, by utilizing the negative pressure generated in the interior (16) of the drum (10) as the suction fan (32) rotates and a plurality of suction holes (12) extending in a radial direction and connecting the interior and exterior of the drum (10). A damper (38) is provided at the air outlet port of the suction fan (32), for opening and closing the outlet port of the fan (32).

Abstract: An ink-jet printer includes a rotary drum for rotating at a constant speed and holding a paper sheet on its peripheral surface, a print head having ink-jet nozzles aligned in the axial direction of the rotary drum to perform printing by spitting ink from these ink-jet nozzles on the paper sheet rotating together with the rotary drum, and a sheet feed-in mechanism for feeding a paper sheet from a cassette and a manual feed tray to the rotary drum. Particularly, the sheet feed-in mechanism has a loading roller unit for loading the paper sheet to the rotary drum, a pickup section for picking up a paper sheet from one of the cassette and the manual feed tray to strike the leading end of the paper sheet against the loading roller unit, and a control section for controlling the loading roller unit to feed, to the rotary drum, the paper sheet whose posture has been corrected upon strike by the pickup section.

Abstract: An ink-jet printer includes a rotary drum which rotates at a constant speed; a medium holding system which holds a printing medium on the rotary drum; and a print head which prints an image by jetting ink onto a printing medium which is held on the rotary drum by the medium holding system and which rotates along with the rotary drum, while the rotary drum makes a predetermined number (greater than one) of rotations during a printing operation.

Abstract: A printing medium winding apparatus includes a drum on a periphery of which a leading-end holding device and a trailing-end engaging groove are provided. The holding device and engaging groove hold and engage with a leading end and trailing end of a printing paper sheet, respectively, when the paper sheet is fed to the drum. The apparatus further includes a paper sheet lifting device which presses the sheet on the periphery of the drum to keep the sheet in close contact with the periphery, and lifts a part of the sheet from the periphery to be curved and projected radially outwardly until the trailing end of the sheet reaches the engaging groove so that the trailing end can be inserted into the engaging groove.

Abstract: The thermal head supporting device of the invention comprises a pair of positioning members disposed at both sides of a platen, a head press/release mechanism movable toward and away from the platen, and a head unit coupled with the head press/release mechanism. The positioning members are disposed coaxially with the platen. The head unit is formed of a head supporting member removably coupled to the head press/release mechanism with a predetermined play, a thermal head supported on the head supporting member and having a plurality of heating elements arranged in a straight line thereon and in confronting relationship with the platen, and a pair of engagement members attached to both sides of the thermal head adjustably for position, and each of the engagement members has a cutting formed therein allowing each positioning member to be removably fitted therein.

Abstract: In a thermal printer according to the present invention, a platen can be mounted in a pressed abutted condition against a thermal head by fixing the platen in a state where the platen is pressed toward a thermal head which is fixedly provided, and when the pressed abutted condition is released by the operation of a release lever the platen is floated in a free condition and it can be easily taken out.