An example sheet guide devices comprises a housing and a guide member coupled to the housing. The housing is to receive a stack of sheets to staple. The guide member includes a cylinder shaft, a counterbalance component, and guide arm. The cylinder shaft is rotatable and disposed within the housing. The counterbalance component is disposed with the cylinder shaft to shift a center of gravity of the guide member in a first direction. The guide arm is disposed off-center from a central axis of the cylinder shaft in a second direction.

A printer extension kit that modifies a printer to receive and output longer pieces of paper. The printer extension kit includes an input extension part, an output extension part, and an output extension clip. The paper tray of a printer is extended by the input extension part allowing the printer to hold longer pieces of paper. The input extension part is attached to the paper tray of a printer. The output extension part allows a printer to output longer pieces of paper. In more detail, the output extension part prevents longer pieces of paper from falling of the catch tray of a printer. The output extension part is attached into the catch tray of a printer. The output extension clip provides another means for a printer to output longer pieces of paper. In more detail, the output extension clip is attached along the output paper catch of a printer.

A printer extension kit that modifies a printer to receive and output longer pieces of paper. The printer extension kit includes an input extension part, an output extension part, and an output extension clip. The paper tray of a printer is extended by the input extension part allowing the printer to hold longer pieces of paper. The input extension part is attached to the paper tray of a printer. The output extension part allows a printer to output longer pieces of paper. In more detail, the output extension part prevents longer pieces of paper from falling of the catch tray of a printer. The output extension part is attached into the catch tray of a printer. The output extension clip provides another means for a printer to output longer pieces of paper. In more detail, the output extension clip is attached along the output paper catch of a printer.

A medium conveying apparatus includes a moving mechanism to move the set guide, a guide pair including a first guide having a first opening and a second opening, and a second guide to regulate a vertical direction of the medium conveyance path, a light emitting element and a light receiving element located on an outside of the medium conveyance path with the first guide in between, and on the downstream side of the first opening and the second opening so as to be apart from the moving mechanism by a predetermined distance or more in the medium conveying direction, a first light guide which is bent so as to guide a light emitted from the light emitting element to the first opening, and a second light guide which is bent so as to guide the light incident from the second opening to the light receiving element.

A medium conveying apparatus includes a moving mechanism to move the set guide, a guide pair including a first guide having a first opening and a second opening, and a second guide to regulate a vertical direction of the medium conveyance path, a light emitting element and a light receiving element located on an outside of the medium conveyance path with the first guide in between, and on the downstream side of the first opening and the second opening so as to be apart from the moving mechanism by a predetermined distance or more in the medium conveying direction, a first light guide which is bent so as to guide a light emitted from the light emitting element to the first opening, and a second light guide which is bent so as to guide the light incident from the second opening to the light receiving element.

An image recording apparatus includes a recording unit, first and second rollers, a guide member, and a cutting unit. The recording unit performs image recording on a sheet conveyed in a conveying direction on a first conveyance path. The first roller is located further downstream than the recording unit in the first conveyance path. The second roller is located further downstream than the first roller in the first conveyance path. The guide member has a guide surface that forms a second conveyance path extending from a connection position of the first conveyance path between the first roller and the second roller. The cutting unit is located between the connection position and the second roller, cuts a sheet, and has a cutter. The guide member changes in posture between a first posture for forming the second conveyance path and a second posture for opening the second conveyance path.

An image recording apparatus includes a recording unit, first and second rollers, a guide member, and a cutting unit. The recording unit performs image recording on a sheet conveyed in a conveying direction on a first conveyance path. The first roller is located further downstream than the recording unit in the first conveyance path. The second roller is located further downstream than the first roller in the first conveyance path. The guide member has a guide surface that forms a second conveyance path extending from a connection position of the first conveyance path between the first roller and the second roller. The cutting unit is located between the connection position and the second roller, cuts a sheet, and has a cutter. The guide member changes in posture between a first posture for forming the second conveyance path and a second posture for opening the second conveyance path.

An image forming apparatus includes a printing device, a rotator, an upstream support stand. The printing device prints an image on a plate-shaped printing medium. The rotator rotates while nipping the plate-shaped printing medium and conveys the plate-shaped printing medium to the printing device. The upstream support stand supports the plate-shaped printing medium at a position upstream from the rotator in a conveyance direction of the plate-shaped printing medium and includes a mount. The mount is detachably attached to the rotator.

A sheet conveyance apparatus includes a first guide to guide a conveyed sheet and a second guide to face the first guide and to form a sheet conveyance path together with the first guide, with the second guide being pivotable between a first position in which the sheet conveyance path is formed and a second position in which the sheet conveyance path is opened. A cover is movable between a closed position in which it covers the second guide and an open position in which the second guide is manipulatable, and an abutting portion is provided on the cover to abut the second guide. In a state where the second guide is held at the second position by the holding portion and the cover moves to the closed position from the open position, the abutting portion abuts the second guide to release the second guide held by the holding portion.

A sheet conveyance apparatus includes a first guide to guide a conveyed sheet and a second guide to face the first guide and to form a sheet conveyance path together with the first guide, with the second guide being pivotable between a first position in which the sheet conveyance path is formed and a second position in which the sheet conveyance path is opened. A cover is movable between a closed position in which it covers the second guide and an open position in which the second guide is manipulatable, and an abutting portion is provided on the cover to abut the second guide. In a state where the second guide is held at the second position by the holding portion and the cover moves to the closed position from the open position, the abutting portion abuts the second guide to release the second guide held by the holding portion.