In a case where a skew of a document being conveyed is detected by a detection unit, an image reading apparatus notifies that documents having different sheet widths may be included in documents stacked on a stacking unit.

A sensor assembly configured to detect rolled stock on a core includes a sensor configured to detect a first roll of stock unwinding from a core, the stock unwinding from the core of the first roll is supplied as a web of stock, wherein in response to the sensor detecting a first detection configuration, the sensor takes no action and continues to detect the first roll, and wherein in response to the sensor detecting a second detection configuration, the sensor provides a command to a splice assembly to transition to a second roll of stock to replace the first roll of stock.

A sheet fed device having a media tray and a sensor assembly is disclosed. The media tray includes a major surface having a leading portion and a trailing portion. The sensor assembly is operably coupled to the media tray. The sensor assembly includes a detector spaced-apart from and movable relative to the media tray in a path laterally across the major surface between the leading portion and the trailing portion.

A recording apparatus includes a recording head performing recording on a recording medium; a cassette on which the recording medium to be transported to the recording head is placed; and a transporting path for transporting the recording medium from the cassette to the recording head. In addition, the recording apparatus includes a medium thickness sensor obtaining thickness information by measuring a thickness of the recording medium in the cassette or the transporting path; a surface information acquisition section acquiring surface information of the recording medium in the cassette or the transporting path; and a determination section specifying a type of the recording medium based on the thickness information and the surface information of the recording medium.

A detection sensor includes: a single light-emitting element that radiates light onto a conveyed material; and multiple light-receiving elements that receive interference light including the light that is scattered at a surface of the conveyed material and the light that is scattered inside the conveyed material.

An image forming device including an optical sensor, an ultrasound sensor, and a conveyance guide. The optical sensor and the ultrasound sensor are disposed alongside a conveyance path of a sheet and are used to determine sheet type. The conveyance guide guides the sheet along the conveyance path. The conveyance guide is structured such that, on the conveyance path between the optical sensor and the ultrasound sensor, the sheet is in contact with the conveyance guide while a portion of the sheet is in a light irradiation range of the optical sensor and a different portion of the sheet is in an ultrasound irradiation range of the ultrasound sensor.

Provided is a recording medium detection device which prevents the decline in productivity. The recording medium detection device comprises a first detecting section and a second detecting section. The first detecting section performs a first adjustment process and makes a detection of a recording medium being transported. The second detecting section is located more downstream than the first detecting section in the transportation direction of the recording medium, performs a second adjustment process which takes a longer time than the first adjustment process, and makes a detection of the recording medium being transported.

A sensing apparatus can be configured to detect an edge of a paper that is received by an automated transaction machine (ATM). The paper can move along a path located inside the ATM, the path having opposite first and second sides. The sensing apparatus can include a light emitter and a light detector on the first side of the path, with the light emitter positioned so that it can emit light across the path to the second side. The light detector can be configured to detect light from the light emitter and can emit a signal corresponding to an amount of detected light. The sensing apparatus can also include a control circuit that can control a flow of power to the light emitter, and the control circuit can also receive the signal emitted by the sensor.

In a medium conveying device, a projector projects light, a projection light amount of the light changes, at every fixed time, to a first projection light amount and a second projection light amount less than the first projection light amount, a receiver receives the light projected from the projector, a processor determines, at fixed sampling timings, whether a reception light amount of the receiver is at a first reception light level or a second reception light level smaller than the first reception light level, determines, when the reception light amount alternately changes to the first reception light level and the second reception light level, that a medium is not present on a conveying path, and determines, when the reception light amount is fixed to either the first reception light level or the second reception light level, that the medium is present on the conveying path.

Provided are a sheet position detection apparatus, a sheet conveyance apparatus, and an image formation apparatus. The sheet position detection apparatus has a first and a second conveyance roller which are arranged to oppose across a sheet to be conveyed and to nip the sheet, and a detector configured to detect an end position of the sheet, the detector has a light emitter and a light receptor arranged on the first conveyance roller side, the light emitter and the light receptor are arranged such that a light emitted from the light emitter is reflected on a reflective face of the second conveyance roller and enters the light receptor, and the detector detects passage of an end of the sheet based on a change in the amount of light entering the light receptor when the sheet shields a light emitted from the light emitter.