Seiko Epson Corporation

Masashi Oba

Daiki Tokushima

Naoki Hori

Yujiro Nomura

Kaneo Yoda

Atsushi Imamura

Kunihiro Kawada

Shinji Kawakami

A printing apparatus includes: a driving roller configured to drive a recording medium by rotation thereof while being in contact with the recording medium; a discharging head configured to discharge liquid onto a recording medium; a driven rotational member configured to be driven to rotate as a result of transport of the recording medium while being in contact with the recording medium; a rotation position detection unit configured to detect a rotation position of the driven rotational member; and a control unit configured to rotate the driving roller to transport the recording medium and adjust a timing of discharging the liquid from the discharging head in accordance with a detection result of the rotation position detection unit. The control unit adjusts a rotational speed of the driving roller in accordance with a linear pressure applied to the recording medium on the driving roller.

Printing apparatus and printing method

An output value of the transport position output portion when a first mark which is provided in a recording medium is at a predetermined position with respect to a detection region is stored in a storage portion as a reference value, and a start timing of the printing of the image is controlled based on the timing at which the mark detection portion detects the mark after confirming that the first mark reaches a predetermined range from the detection region based on comparison of the output value of the transport position output portion and the reference value with each other, when the transport in the first direction of the recording medium is started.

A method includes, a first step of starting rotation of a rotating axle, which is configured to detachably support a web, in a direction in which the web is wounded onto the rotating axle, a second step of detecting a tension applied to the web after the first step, a third step of performing open loop control on torque applied to the rotating axle until the tension greater than a designated value is detected with the second step, and a fourth step of performing feedback control on the torque applied to the rotating axle based on the detection value of the tension applied to the web after the tension greater than the designated value is detected with the second step.

Tension control method, and printing device

An image forming apparatus includes a control unit that applies a tension to a recording medium in a first region between a rotational shaft and a driving roller using a torque applied to the rotational shaft and the driving roller, and applies a tension to the recording medium in a second region where a support member supports the recording medium using a torque applied to the driving roller and a holding unit. The control unit selectively executes an image forming mode where the head is caused to execute image forming by applying a tension to the recording medium in the second region while applying a tension to the recording medium in the first region, and a medium detaching mode where the tension in the first region is released when the recording medium is stopped, while applying a tension for detaching a medium to the recording medium in the second region.

Image forming apparatus, method of controlling tension of recording medium

A rotation shaft configured to rotate in a direction in which a sheet is fed in and in a direction in which the sheet is wound while supporting the sheet, a control unit configured to apply tension to the sheet by the rotation shaft by controlling torque applied to the rotation shaft, an ejection unit configured to eject light-curable liquid onto the sheet, and an irradiation device configured to irradiate light onto the liquid ejected onto the sheet by the ejection unit are provided. The tension applied to the sheet by the rotation shaft when the rotation shaft rotates in the direction in which the sheet is wounded is smaller than the tension applied to the sheet by the rotation shaft when the rotation shaft rotate in the direction in which the sheet is fed in.

Image recording apparatus and sheet transfer method

A mark detection method includes a first step for acquiring a signal that is outputted from a detector configured to output a signal of a first level when a detection value is equal to or more than a first threshold value and output a signal of a second level different from the first level when the detection value is less than the first threshold value, while a state of a web is being detected using the detector, a second step for acquiring conveyance information indicative of a state of conveyance of the web, and a third step for determining whether or not to count the signal of the second level outputted by the detector based on the conveyance information.

Mark detection method and print apparatus

An image recording device includes a support member, a print head, a tension adjustment unit, and a control unit. The control unit is configured: to move the print head to the retracted position; to control the tension adjustment unit to adjust the tension of the print medium to a print tension while the print head is positioned at the retracted position; to move the print head to the print position; to control the print head to execute printing; to move the print head to the retracted position, and to control the tension adjustment unit to release the tension of the print medium while the print head is positioned at the retracted position.

Image recording device, image recording method

An image formation device includes a transport section that transports a recording medium in a transport direction, a width-direction positional change section that changes a position of the recording medium in a width direction, a detector that detects a position of an edge of the recording medium in the width direction within a detection area, a control section that performs width-direction positional control by operating the width-direction positional change section in accordance with a detection result of the detector and by performing feedback control on the position of the recording medium in the width direction, and an image formation section that is located so as to face the recording medium and performs image formation on the recording medium. The control section performs control, during the image formation, in a first control mode where the width-direction positional control is performed with a first frequency response characteristic corresponding to a frequency band including a high frequency band or in a second control mode where the width-direction positional control is performed with a second frequency response characteristic corresponding to a frequency band lower than the high frequency band.

Image formation device and transport control method for recording medium

An image recording device includes: a support member for supporting a sheet-shaped print medium; a print head that moves between a print position, at which printing of an image onto the print medium is executed, and a retracted position, farther away from the support member than the print position, while also facing the support member, with the print medium interposed therebetween; a tension adjustment unit for adjusting the tension of the print medium being supported by the support member; and a control unit whereby printing is executed by the print head having been positioned at the print position while the tension of the print medium is adjusted to a print tension by the tension adjustment unit, whereas the print head is positioned at the retracted position when the tension of the print medium is being altered by the tension adjustment unit.

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Nagano, Japan

Masashi Oba