Ricoh Company, Ltd.

Takehiro Chiba

Tatsuya Ishii

Yuji Karikusa

Yusuke Ishizaki

A conveying device includes a sensor to read a sheet to be conveyed, a first conveyor arranged on an upstream side from the sensor in a sheet conveying direction of the sheet, a second conveyor arranged on a downstream side from the sensor in the sheet conveying direction, and correcting circuitry to correct a distance of the sheet having an error detected when the sensor reads the sheet conveyed by the first conveyor and the second conveyor, to an actual distance. The correcting circuitry uses at least a first correction value correcting a distance read by the sensor when the first conveyor conveys the sheet and a second correction value correcting a distance read by the sensor when the second conveyor conveys the sheet.

Conveying device, image forming apparatus incorporating the conveying device, position detecting method of the image forming apparatus, and recording medium

A device includes a head to perform an operation on a conveyed object; a head moving device to move the head in a width direction orthogonal to a conveyance direction of the conveyed object; a position detector to detect a position of the conveyed object in the width direction; a speed detector to detect a moving speed of the conveyed object in the width direction; a position predictor to obtain a predicted width position of the conveyed object after a predetermined period, based on a detected position of the conveyed object and a detected moving speed of the conveyed object; a speed calculator to calculate a travel speed of the head; and a head travel controller to control the head moving device to move the head at the calculated travel speed. With the calculated travel speed, the head arrives at the predicted width position after the predetermined period.

Device including movable head and head control method

A mark detecting device includes: a belt on which a plurality of marks are provided along a moving direction of the belt; a light-emitting element configured to irradiate at least one of the marks with light; a light-receiving element configured to receive a reflected light reflected from at least one of the belt and the mark of the light irradiated from the light-emitting element and output a signal; and a light amount adjuster configured to compare a first value obtained from the signal output by the light-receiving element and a second value obtained from a signal output by the light-receiving element after the first value is obtained, and to perform light amount adjustment of the light-emitting element when a difference between the first value and the second value is a first threshold or more.

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Kanagawa, Japan

Takehiro Chiba