Abstract: A printer includes a conveyor to convey a medium placed on a table, an ink head including a first nozzle group to discharge a first ultraviolet curable ink and a second nozzle group to discharge a second ultraviolet curable ink before or after the first ultraviolet curable ink is discharged, and mounted on a carriage, an ultraviolet irradiator on the carriage to irradiate the ultraviolet curable inks discharged onto the medium with ultraviolet light, and an attachment structure including fixing portions to fix the ultraviolet irradiator. A position of the ultraviolet irradiator with respect to the carriage is changeable by selecting one of the fixing portions depending on whether a conveying direction of the table is unidirectional or bidirectional.

Abstract: A thermal transfer light pen and a thermal transfer apparatus favorably perform thermal transfer even using light as a heat source to a thermal transfer sheet and performing thermal transfer to a transfer object with an uneven surface. A thermal transfer light pen includes a hollow pen body including a front end portion, a pressing body in the front end portion of the pen body and including a curved surface projecting toward a front end, a light guide including a first end and a second end, at least a portion of the light guide inside the pen body, and a light source connected to the first end of the light guide. The second end of the light guide is disposed in the front end portion of the pen body and faces the pressing body in the pen body. The pressing body is made of a material transparent to light emitted from the light source.

Abstract: The image forming apparatus includes: a paper feed unit; a print unit; a registration roller; a sheet leading end sensor provided downstream, in a transport direction of the recording paper, of the registration roller; a time measuring unit for measuring a time from a start point of transportation of the recording paper by the registration roller to a point of detection of the leading end of the recording paper by the sheet leading end sensor; a memory unit for storing a reference image forming time and a reference time; a print control unit; and an arithmetic unit for obtaining a difference between the reference time and the time detected by the time measuring unit. The print control unit adjusts the length of the image forming period in accordance with the adjusted image forming time determined based on the difference obtained by the arithmetic unit and the reference image forming time.

Abstract: A diaphragm pump includes a pump chamber, a diaphragm, and a diaphragm deformer. The pump chamber is box-shaped and includes at least an inlet opening, an outlet opening, and a diaphragm attaching opening. The pump chamber is provided with an inner space. A diaphragm is made of an elastically deformable material, and is provided in the pump chamber so as to cover the diaphragm attaching opening. The diaphragm deformer elastically deforms the diaphragm to change a capacity of the inner space. The outlet opening is located at a highest position in the inner space of the pump chamber.

Abstract: A diaphragm pump includes an inflow chamber and an outflow chamber. The inflow chamber is provided with an inflow valve seat. An inflow valve that prevents backflow of a liquid is disposed against the inflow valve seat. The outflow chamber is provided with an outflow valve seat. An outflow valve that prevents backflow of a liquid is disposed against the outflow valve seat. The diaphragm pump also includes an inflow-valve presser that presses the inflow valve against the inflow valve seat, and an outflow-valve presser that presses the outflow valve against the outflow valve seat. Each of the inflow valve and the outflow valve is defined by an elastically deformable member. Each of the inflow valve seat and the outflow valve seat includes a surface at least a portion of which is a curved surface.

Abstract: A diaphragm pump includes a pump chamber, a diaphragm, and a diaphragm deformer. The pump chamber is box-shaped and includes at least an inlet opening, an outlet opening, and a diaphragm attaching opening. The pump chamber is provided with an inner space. A diaphragm is made of an elastically deformable material, and is provided in the pump chamber so as to cover the diaphragm attaching opening. The diaphragm deformer elastically deforms the diaphragm to change a capacity of the inner space. The outlet opening is located at a highest position in the inner space of the pump chamber.

Abstract: A thermal transfer light pen and a thermal transfer apparatus favorably perform thermal transfer even using light as a heat source to a thermal transfer sheet and performing thermal transfer to a transfer object with an uneven surface. A thermal transfer light pen includes a hollow pen body including a front end portion, a pressing body in the front end portion of the pen body and including a curved surface projecting toward a front end, a light guide including a first end and a second end, at least a portion of the light guide inside the pen body, and a light source connected to the first end of the light guide. The second end of the light guide is disposed in the front end portion of the pen body and faces the pressing body in the pen body. The pressing body is made of a material transparent to light emitted from the light source.

Abstract: A diaphragm pump includes an inflow chamber and an outflow chamber. The inflow chamber is provided with an inflow valve seat. An inflow valve that prevents backflow of a liquid is disposed against the inflow valve seat. The outflow chamber is provided with an outflow valve seat. An outflow valve that prevents backflow of a liquid is disposed against the outflow valve seat. The diaphragm pump also includes an inflow-valve presser that presses the inflow valve against the inflow valve seat, and an outflow-valve presser that presses the outflow valve against the outflow valve seat. Each of the inflow valve and the outflow valve is defined by an elastically deformable member. Each of the inflow valve seat and the outflow valve seat includes a surface at least a portion of which is a curved surface.

Abstract: An image forming apparatus includes a high speed correction mode in which, at the time of a successive image forming process on a plurality of recording sheets, a preset number of recording sheets among the plurality of recording sheets are subjected to image formation based on a corrected image writing position, and other recording sheets are subjected to image formation based on the corrected image writing position; and a linear correction mode in which the plurality of recording sheets are subjected to image formation based on the corrected image writing position; and performs switching to either one of the high speed correction mode and the linear correction mode according to a correction amount ?b for a recording sheet detected at the time of image formation with respect to a correction amount ?a for the preset number of recording sheets.

Abstract: The image forming apparatus includes: a paper feed unit; a print unit; a registration roller; a sheet leading end sensor provided downstream, in a transport direction of the recording paper, of the registration roller; a time measuring unit for measuring a time from a start point of transportation of the recording paper by the registration roller to a point of detection of the leading end of the recording paper by the sheet leading end sensor; a memory unit for storing a reference image forming time and a reference time; a print control unit; and an arithmetic unit for obtaining a difference between the reference time and the time detected by the time measuring unit. The print control unit adjusts the length of the image forming period in accordance with the adjusted image forming time determined based on the difference obtained by the arithmetic unit and the reference image forming time.

Abstract: An image forming apparatus includes a high speed correction mode in which, at the time of a successive image forming process on a plurality of recording sheets, a preset number of recording sheets among the plurality of recording sheets are subjected to image formation based on a corrected image writing position, and other recording sheets are subjected to image formation based on the corrected image writing position; and a linear correction mode in which the plurality of recording sheets are subjected to image formation based on the corrected image writing position; and performs switching to either one of the high speed correction mode and the linear correction mode according to a correction amount ?b for a recording sheet detected at the time of image formation with respect to a correction amount ?a for the preset number of recording sheets.

Abstract: A pair of registration rollers are provided upstream in a paper transport path from an image forming position, and a paper transport position detection portion is provided upstream in the paper transport path from the pair of registration rollers. When consecutive print processing on a plurality of sheets of paper is performed, a paper transport position in the paper transport path is detected by the paper transport position detection portion for a sheet of paper that has been set in advance among the plurality of sheets of paper. A correction amount of a position for image writing to a photosensitive drum is determined based on the paper transport position, and correction of the image writing position is performed based on the correction amount.

Abstract: The present invention provides a sheet feeding apparatus including an overlapped feeding detection apparatus which can securely detect overlapped feeding as to a sheet being fed, and a document feeding apparatus and an image processing apparatus including the sheet feeding apparatus. A paper feeding apparatus 1b includes a paper feed tray 11, a pickup roller 61, a paper roller 63, a sorting roller 64, feeding rollers 66a, resist rollers 67, a paper ejection roller 73, a passage detection sensor 69, an overlapped feeding detection sensor 68 and a second detection apparatus 71. Recording paper is delivered from the paper feed tray 11 by the pickup roller 61 according to a printing instruction from a user. The recording paper is fed to the resist rollers 67 through the paper roller 63, the sorting roller 64, the feeding rollers 66a and the passage detection sensor 69. The recording paper temporarily stops at the resist rollers 67.

Abstract: A paper multi-feed detection apparatus and a paper multi-feed detection method are provided for preventing the detection capability from being deteriorated by a noise factor and improving the detection precision even where an area around the feeding path has no extra space in terms of the shape and there are many noise-generating factors because of a demand for a smaller size of the device. An ultrasonic transmission opening formed in one of two feeding guide plates is large so as to discharge outside a reflected wave which returns through the ultrasonic transmission opening, and an ultrasonic receiving opening formed in the other feeding guide plate is smaller than a receiving face area of a receiver for receiving the ultrasonic wave.

Abstract: The present invention provides a sheet feeding apparatus including an overlapped feeding detection apparatus which can securely detect overlapped feeding as to a sheet being fed, and a document feeding apparatus and an image processing apparatus including the sheet feeding apparatus. A paper feeding apparatus 1b includes a paper feed tray 11, a pickup roller 61, a paper roller 63, a sorting roller 64, feeding rollers 66a, resist rollers 67, a paper ejection roller 73, a passage detection sensor 69, an overlapped feeding detection sensor 68 and a second detection apparatus 71. Recording paper is delivered from the paper feed tray 11 by the pickup roller 61 according to a printing instruction from a user. The recording paper is fed to the resist rollers 67 through the paper roller 63, the sorting roller 64, the feeding rollers 66a and the passage detection sensor 69. The recording paper temporarily stops at the resist rollers 67.

Abstract: A pair of registration rollers are provided upstream in a paper transport path from an image forming position, and a paper transport position detection portion is provided upstream in the paper transport path from the pair of registration rollers. When consecutive print processing on a plurality of sheets of paper is performed, a paper transport position in the paper transport path is detected by the paper transport position detection portion for a sheet of paper that has been set in advance among the plurality of sheets of paper. A correction amount of a position for image writing to a photosensitive drum is determined based on the paper transport position, and correction of the image writing position is performed based on the correction amount.