A sheet conveying apparatus includes a curved sheet conveyance path through which a sheet passes, and a sensor that is disposed in the sheet conveyance path and detects the passing sheet. The sensor includes a light-emitting portion that collects light from a light source and irradiates the passing sheet in an irradiating range which is broader in a sheet conveyance direction than a width direction, and a light-receiving portion that receives the light arriving at and reflected from the sheet.

A sheet transportation device includes a sheet loading table, a feeding unit that feeds a sheet placed on the sheet loading table, a first detection unit that is provided downstream of the feeding unit in a sheet transportation direction and that detects a position of a leading end of the sheet, a second detection unit that is provided upstream of the feeding unit in the sheet transportation direction and that detects a position of a leading end of a small-size sheet which is smaller than the sheet detected by the first detection unit, and a control unit that starts feeding the sheet based on a result of detection performed by any of the first detection unit or the second detection unit in accordance with a size of the sheet.

A medium transport method, which is performed by a medium transport device having a transport unit which includes rollers that can pinch a medium and which transports the medium, includes inserting the medium to a predetermined position, pressing a side end portion of the medium against a side surface guide, and pinching the medium with the rollers, and transports the medium.

A measurement apparatus including: a conveyance unit configured to convey a sheet in a conveyance direction; a measurement portion configured to measure an image formed on the sheet; a first movement unit configured to move the measurement portion in a predetermined direction orthogonal to the conveyance direction; a second movement unit configured to move the measurement portion to a first position and a second position farther apart from the sheet than the first position; and a first abutment member, a second abutment member, a third abutment member, and a fourth abutment member, which abut against the sheet when the measurement portion is located at the first position. When the measurement portion is moved from the second position to the first position, the third abutment member and the fourth abutment member are brought into abutment against the sheet earlier than the first abutment member and the second abutment member.

A printer includes a lower tray and an upper tray provided above the lower tray. Each tray is provided with an edge guide that is displaceable according to the sheet size and that guides an edge of sheets. A guide sensor capable of detecting the distance to each edge guide is spaced from the edge guide by a gap in the displacement direction of the edge guide.

A sheet feeding device includes a feeding guide of resin material constituting a sheet feeding path along which a sheet is fed; a feeding roller for feeding the sheet along the feeding path, the feeding roller being provided with a metal shaft; a sheet sensor configured to detect the sheet fed along the sheet feeding path; and a grounding member electrically grounding the shaft. The feeding guide has a guiding surface for guiding the sheet, and the guiding surface is provided with a hole portion for exposing the shaft to the sheet feeding path.

A printing apparatus can prevent a print medium from buckling during discharging. In a case in which the print conveyance speed determined by the print mode is higher than or equal to a specified speed, the print medium after printing is conveyed to a discharging tray at the print conveyance speed, and in a case in which the print conveyance speed determined by the print mode is lower than the specified speed, the print medium after printing is conveyed to the discharging tray at the specified speed increased from the print conveyance speed.

The machine (1; 1OO) comprises a winding station (3; 101), adapted to receive secondary winding cores (T) coaxial with, and adjacent to, one another. The machine further comprises a cutting device (11; 104) with a plurality of blades (13; 105), arranged upstream of the winding station (3; 101) with respect to the feeding direction of the web material (N) and adapted to slit the web material into a plurality of strips (S1-S5) of web material. An in-line measurement arrangement (81-87) is also provided for measuring the Poisson's ratio of the web material (N).

The present invention provides a recording medium detecting device, an image forming device, an image forming system, a recording medium detecting method, and a non-transitory recording medium storing a computer readable program capable of detecting a grain direction of a recording medium. A recording medium detecting device has: a sensor capable of detecting a recording medium from a first detection direction and a second detection direction different from the first detection direction; and a control unit. The control unit determines a grain direction of a recording medium from first surface property data obtained when the recording medium is detected from the first detection direction and second surface property data obtained when the recording medium is detected from the second detection direction.

The present disclosure is a sheet producing device for producing a multi-layer sheet by applying a coating material to a sheet material. The sheet producing device includes a radiation light source that emits radiation light, a division part that divides the radiation light into measurement light to be incident on the multi-layer sheet and reference light with which a reference surface is to be irradiated, and an optical member that emits the measurement light onto the multi-layer sheet and receives the measurement light reflected by the multi-layer sheet. An interference detector that detects interference light between the measurement light reflected by the multi-layer sheet and the reference light reflected by the reference surface, and a thickness calculator that calculates a thickness of the sheet material and a thickness of the coating material of the multi-layer sheet based on the detected interference light are further included. As a result, the tact time from the production of the multi-layer sheet to the calculation of the thickness can be shortened.