Abstract: In a first step, a sheet is conveyed in a direction, whereby a leading end portion of the sheet is fed to a position between a decurl roller and a decurl pinch roller, which are in positions spaced apart from each other. In a second step, the leading end portion of the sheet is curved and held by causing the decurl pinch roller to come close to or press against the decurl roller. In a third step, the leading end portion of the sheet is withdrawn from between the decurl roller and the decurl pinch roller by conveying the sheet in a direction opposed to the conveying direction. After executing the first to third steps, the sheet is conveyed in the conveying direction through the first step while the sheet is curved by the decurl roller.

Abstract: A sheet conveyance apparatus includes a conveyance roller pair that has a roller with a uniform diameter in a sheet width direction and that is configured to pinch and convey a sheet, and a guide unit that is provided on an upstream side of the conveyance roller pair and that is configured to regulate a position of an edge of the sheet, wherein the conveyance roller pair conveys the sheet in a state in which the sheet is bended by the guide unit so that on a roller side with a uniform diameter in a sheet width direction, the sheet convexly bends.

Abstract: A printing apparatus has a sensor unit which optically detects, at a measurement position, a surface of a sheet, for measuring a moving state of the sheet. The sensor unit measures the moving state of the sheet when the sheet is located at the measurement position, and measures a moving state of a surface of the rotary member when the sheet is not located at the measurement position. The sensor unit has at least one of an image sensor arranged to perform imaging of one of the surface of the sheet and the surface of the rotary member so as to obtain image data, based on which the moving state is measured and a Doppler velocity sensor.

Abstract: A control unit includes a memory storing correction data obtained by associating information acquired by a first acquisition unit (rotary encoder) with information acquired by a second acquisition unit (direct sensor) with respect to, at least one rotation of a conveying roller. When a plurality of images are sequentially printed on a first surface and a second surface of a continuous sheet, the control unit reads the correction data corresponding to the rotation information acquired by the first acquisition unit from the memory and corrects at least one of driving control of a print head and driving control of the roller. The correction data used in printing on the first surface of the sheet is different from that used in printing on the second surface of the sheet.

Abstract: An apparatus includes a first conveyance unit configured to convey a sheet, a first guide located downstream of the first conveyance unit in a conveyance direction and configured to guide a first side end of the conveyed sheet, a skew unit configured to convey the sheet in an oblique direction to come closer to the first guide, a second guide configured to contact a second side end opposite the first side end to guide the second side end, a second conveyance unit located downstream of the first guide in the conveyance direction, and a control unit configured to perform control so that, after conveying the sheet by the skew unit with the first guide contacting the first side end while the second guide is separated from the second side end, the second guide moves to a position close to the second side end.

Abstract: With front face printing, the sheet fed from a sheet feeding unit is led into a nipped position between a first pinch roller and a decurling roller from a first direction, and is discharged by decurling force being applied thereto at the decurling roller. On the other hand, the sheet fed from a reverse unit is led into the nipped position from a second direction opposite to the first direction, and is discharged by decurling force being applied thereto at the decurling roller.

Abstract: A device includes a conveying unit conveying a sheet, a guide, disposed downstream of the conveying unit in a conveying direction, guiding one side end of the conveyed sheet while being in contact with a side end, a feeding unit obliquely conveying the sheet closer to the guide, a pressing unit pressing the conveyed sheet in a direction in which the sheet moves away from the guide, and a control unit controlling the pressing unit and the feeding unit so that the feeding unit nips the pressed sheet to form a loop in the sheet between the conveying unit and the feeding unit and then conveys the sheet while the side end of the sheet is in sliding contact with the guide.

Abstract: A decurling unit regulates a decurling force so as to be smaller when a sheet is returned from a printing unit to a sheet feeding unit than when the sheet is fed from the sheet feeding unit to the printing unit.

Abstract: A both-side recording apparatus that enables both-side recording on continuous paper using a single recording head, without cutting the continuous paper at an intermediate position, is provided. Reduction in size and costs of the apparatus is achieved by eliminating a conveying path dedicated to both-side recording. The apparatus includes a paper-feeder that feeds continuous paper, a recording head that records an image on the continuous paper, a reversing unit that reverses the continuous paper such that a recording surface of the continuous paper facing the recording head is reversed, and a rewinding mechanism that rewinds the fed continuous paper to the paper-feeder. During both-side recording, recording is performed on the back side of the continuous paper by rewinding the continuous paper by the rewinding mechanism, setting the back side of the continuous paper to oppose the recording head by the reversing unit, and feeding the continuous paper from the paper-feeder.

Abstract: A device includes a conveying roller configured to convey a recording medium, a follower roller configured to press the recording medium against the conveying roller, a detector configured to detect a direction of skew of the conveyed recording medium, and a changer configured to change a state of contact between the recording medium and the conveying roller in accordance with a result of the detection by the detector such that a length of a portion of the conveying roller that is in contact with the recording medium in a conveyance direction is larger on a side toward which the recording medium is skewed than on an opposite side.

Abstract: An apparatus includes a line-type recording head including a plurality of recording elements formed thereon, a holding unit configured to hold a sheet, a conveyance mechanism configured to convey the sheet held by the holding unit to a position of recording by the recording head, a shift mechanism capable of relatively shifting a position of the sheet in a sheet width direction with respect to the recording head while the sheet is fed from the holding unit to the recording position, and a control unit configured to control the conveyance mechanism and the shift mechanism.

Abstract: A sheet conveying device includes a first conveying unit configured to convey a sheet in a conveying direction; a conveying path configured to guide the sheet to the first conveying unit, the sheet having been conveyed by the first conveying unit in a direction opposite to the conveying direction; a second conveying unit configured to convey the sheet in the conveying path; a rotation direction detecting unit configured to detect a rotation direction of the second conveying unit; and a control unit configured to perform control, at startup, to drive the first conveying unit in a direction that causes the sheet to be conveyed in the conveying direction, and if the rotation direction detecting unit detects rotation of the second conveying unit, to drive the second conveying unit in the rotation direction that is detected by the rotation direction detecting unit.

Abstract: In a first step, a sheet is conveyed in a direction, whereby a leading end portion of the sheet is fed to a position between a decurl roller and a decurl pinch roller, which are in positions spaced apart from each other. In a second step, the leading end portion of the sheet is curved and held by causing the decurl pinch roller to come close to or press against the decurl roller. In a third step, the leading end portion of the sheet is withdrawn from between the decurl roller and the decurl pinch roller by conveying the sheet in a direction opposed to the conveying direction. After executing the first to third steps, the sheet is conveyed in the conveying direction through the first step while the sheet is curved by the decurl roller.

Abstract: In order to stabilize a performance of a pump employed for processing in an inkjet printing apparatus such as sucking ink from a printing head with a low cost configuration and without the need of using any specific detecting unit, the following configuration is employed. Namely, a tube pump having a member with a curved surface aligned with a flexible tube for supporting the tube and a roller which moves while pressing (squeezing) the flexible tube is driven with a DC motor. To keep revolutions always constant, a current PWM control is employed for changing a power applied to the motor according to load fluctuations, and a phase of the roller is determined based on the current PWM value to manage a pressure generated by the pump and a discharge rate.

Abstract: A compact sheet material feeding device with a small height is provided. The device includes a lower sheet material stacking unit, an upper sheet material stacking unit disposed above and movable relative to the lower sheet material stacking unit, a feeding mechanism swingable between a first position relatively near to the lower sheet material stacking unit and a second position away from the lower sheet material stacking unit, a holding member configured to hold the feeding mechanism at the second position, and a pressing plate configured to move sheet material stacked in the upper sheet material stacking unit toward the feeding mechanism so that the sheet material is pressed against the feeding mechanism.

Abstract: In order to stabilize a performance of a pump employed for processing in an inkjet printing apparatus such as sucking ink from a printing head with a low cost configuration and without the need of using any specific detecting unit, the following configuration is employed. Namely, a tube pump having a member with a curved surface aligned with a flexible tube for supporting the tube and a roller which moves while pressing (squeezing) the flexible tube is driven with a DC motor. To keep revolutions always constant, a current PWM control is employed for changing a power applied to the motor according to load fluctuations, and a phase of the roller is determined based on the current PWM value to manage a pressure generated by the pump and a discharge rate.

Abstract: A method includes pulling out and conveying a sheet having splice portions, acquiring information relating to a position of an indentation on the sheet formed in addition to a splice portion, and performing processing on the sheet but a position corresponding to the acquired position of the indentation and its vicinity.

Abstract: A printer has a pair of a right side member (8) and a left side member (9) placed on opposite side portions of a base (53), rollers including a transport roller (3), a carriage chassis (12), a platen (2) and a feed unit. The right side member and the left side member are formed by molding a resin material. The roller, the carriage chassis, the platen and the feed unit are positioned and held with the pair of the right side member and the left side member.

Abstract: Provided is a printing apparatus, including a sensor unit which optically detects, at a measurement position, a surface of a sheet, for measuring a moving state of the sheet. The sensor unit measures the moving state of the sheet when the sheet is located at the measurement position, and measures a moving state of a surface of the rotary member when the sheet is not located at the measurement position.

Abstract: Provided is a printing apparatus including a sensor unit for measuring a moving state of a sheet by optically detecting a surface of the sheet conveyed by a conveying unit. The sensor unit measures and compares the moving states of the sheet at a first measurement position and a second measurement position which are distinct from each other in a main scanning direction, to thereby obtain information on a skew state of a skew component of the moving sheet.