An image reading device includes: a controller which performs a first drive operation for rotating the discharge roller, and a second drive operation for moving the discharge guide between the third position and the fourth position. The controller stops the first drive operation when performing the second drive operation, and stops the second drive operation when performing the first drive operation.

A sheet conveyance apparatus includes: a pair of conveyance rollers having a first conveyance roller and a second conveyance roller and configured to convey a sheet; a support member configured to support the first conveyance roller; an openable and closable member configured to support the second conveyance roller and pivotable with respect to the support member so as to make the second conveyance roller contact with and separate from the first conveyance roller; a locking protrusion provided on the support member; and a locking member provided to be pivotable with respect to the openable and closable member and lockable to the locking protrusion so as to hold the openable and closable member in a closed position in which the second conveyance roller contacts the first conveyance roller. The locking protrusion or a part of the locking protrusion to which the locking member locked is rotatable.

A printer is provided with a roll paper holding portion that holds roll paper without axially supporting the roll paper; a sheet conveying unit that conveys a sheet supplied from the roll paper, a printing unit that executes printing on the sheet; and a roll paper pressing unit that presses the roll paper held in the roll paper holding portion, wherein the roll paper pressing unit is provided with a pressing roller that presses the roll paper and rotates along with the sheet conveyance, and a rotation suppressing portion that suppresses the rotation of the pressing roller.

An image reading device includes a first roller that is rotatably supported by a frame, a second roller that is supported by the frame in a rotatable and translatable manner and that presses a medium against the first roller, a joint unit that transmits rotation from a drive shaft to the second roller, a drive unit that rotates both the first roller and the drive shaft, and a read unit configured to read an image on a conveyed medium that is conveyed by the rotation of the both of the first roller and the second roller.

A device for reducing rotation of an article during singulation of a stack of articles is disclosed. The device may include a torsion element, a rotatable member configured to rotate about an elongated axis of the torsion element between a first position and a second position, and a revolving member coupled to the rotatable member. An outer surface of the revolving member contacts a drive belt in the first position and an article in the second position. The torsion element exerts torque on the rotatable member when it moves from the first position towards the second position. The torque causes the outer surface of the revolving member to apply a frictional force to the article, thereby minimizing rotation of the article. Systems and methods of singulating articles are also disclosed.

An image recording device is provided, having a recording unit configured to record an image on a sheet, and a tray disposed below the recording unit. The tray includes a sheet holding surface configured to hold the sheet. Additionally, the image recording device includes a sheet feeder disposed between the recording unit and the tray. The sheet feeder includes a roller for feeding the sheet from the tray. The roller is configured to move between a first roller position in which the roller contacts the sheet holding surface of the tray and a second roller position in which the roller is separated from the sheet holding surface. A return guide, disposed between the recording unit and the sheet feeder, defines a second conveying path to guide the sheet having an image recorded on one side thereof back to the feed guide. The return guide has a first opening configured to accommodate the roller of the sheet feeder when the roller is in the second roller position.

A conveying device includes a first guide section, a second guide section, and an urging section. The second guide section has a guide center portion and pivots about the guide center portion. The second guide section is pivotable between a guide position and a separation position. The guide position is a position in which the second guide section is located when a conveyance path of a sheet is formed between the second guide section and the first guide section. When the second guide section is in the guide position, the urging section urges the second guide section in a first pivot direction.

The purpose of the present invention is to provide a sheet post-processing apparatus which facilitates eliminating of a jammed sheet occurring in the path when sheets discharged from an image forming apparatus are stored as being sorted into two directions. The present invention comprises a sheet post-processing apparatus including a first conveying path through which a sheet introduced from a first introducing port is conveyed, a second conveying path through which a sheet introduced from a second introducing port is conveyed, and a stack portion which stacks sheets conveyed through the second conveying path and which is configured to have at least a part of the stack portion be swingable about an axis intersecting with a sheet conveyance direction of a sheet conveyed to the second conveying path between a stack position where sheets are stacked and an open position where the first introducing port of the first conveying path is opened.

A sheet feeding device includes a stacking unit for stacking a sheet; a feeding member for feeding the sheet stack on the stacking unit; a holding member holding the feeding member; a holder supporting portion, provided above the stacking unit, for detachably supporting the holding member; a raising and lowering unit for raising and lowering the holding member; a detection unit for detecting a topmost surface of the sheet stacked on the stacking unit, by detecting the holding member; a control unit for effecting raising and lowering operation of the holding member using the raising and lowering unit before a feeding operation of the feeding member and detect presence or absence of the holding member on the basis of a signal from the detection unit produced with the raising and lowering operation.

Provided is a hologram transcription apparatus including: an exposure part; and a light source part for irradiating light to the exposure part. Here, the exposure part includes a transfer unit for transferring a hologram film, and the exposure part is rotatable to change an angle formed with the light.