A document transport device includes a placement portion, a slide member, a movable piece, and a detector. A document is to be placed on the placement portion. The slide member includes a document guide that contacts one lateral side of the document which is placed on the placement portion. The movable piece is provided to the slide member, and includes a shading pattern composed of plural patches that have plural densities corresponding to plural document sizes and having plural adjacent patch density differences that are different from each other. The detector detects a density of the shading pattern, and outputs an output signal for document size recognition.

A printer includes: a printing head; a conveyor; a cutter for cutting the medium to provide a segmented medium; a discharge roller; a counter roller; a sensor for detecting whether the segmented medium remains between the discharge roller and the counter roller; and a controller configured to perform: setting an operation mode to one of a first mode and a second mode depending on a medium kind; controlling the printing head and the conveyor to perform a first print control on the medium; controlling the sensor to detect whether the segmented medium has been removed; and permitting a second print control to be performed. When the operation mode is the first mode, the second print control is permitted after the sensor detects whether the segmented medium has been removed. When the operation mode is the first mode, the second print control is permitted without controlling the sensor.

A print data generation device includes a control unit that generates print data, and the control unit calculates a label length for a label to be printed on the basis of the first print data, acquires a maximum label length, generates first print data in a case in which a calculated label length, which is a label length that is calculated, does not exceed the maximum label length, and generates second print data, the label length of which is equivalent to the maximum label length, in a case in which the calculated label length exceeds the maximum label length.

A printer includes a printer body including an installation area where a recording medium is installed, a print head that prints information on the recording medium, a controller, a movable guide that guides the side of the recording medium in the installation area, and a first switch that detects a position of the movable guide attached to the installation area. The controller performs a print control process corresponding to the width of the recording medium based on information obtained by the first switch.

An image forming apparatus includes a plurality of heaters, a plurality of temperature sensors, an object sensor, and control circuitry. The temperature sensors are formed at positions corresponding to the heaters. The object sensor is configured to detect an overlap region of a medium and the heaters. The control circuitry is configured to correct temperature information acquired by the temperature sensors, according to the overlap region detected by the object sensor and the positions of the temperature sensors, and control the heaters based on the corrected temperature information.

An aspect of one or more embodiment may be an inkjet image formation apparatus that may include: a head drive processor that drives a recording head to eject ink; a conveyance processor that drives a conveyance member to convey a recording medium; a carriage drive processor that drives a carriage with the recording head to move in a main scanning direction; a medium detector movable in the main scanning direction and configured to detect the recording medium on a platen; and a medium detection processor that obtains an output of the medium detector that detects plural points on the recording medium, and identify a type of the recording medium based on the obtained output of the medium detector at the plural points.

A web printing apparatus comprising a support platen facing the processing station for supporting the web, when being processed by the processing station and a first guard for guarding a side edge of a web, the first guard being connectable to the support platen for guiding the web along a transport path, when the web is processed by the processing station. A detector is provided for detecting the first guard when connected to the support platen as well as a control unit configured for controlling the processing station to process the web, wherein the control unit is configured to identify the guard based on a detection signal provided by the detector to the control unit. Thereby, the first guard is identified by the control unit which may then control the movement of the print carriage to avoid the first guard, preventing collisions.

A printing device includes: a substrate feed-out section; a substrate transport section; a storage which stores the width size of the substrate; a skew correction section including a skew sensor which detects the skew of the substrate, and adapted to correct the skew of the substrate with reference to an output of the skew sensor and the substrate width size stored in the storage; an image recording section which performs an image recording operation on the substrate; a first sensor which detects a width size-changed portion of the substrate upstream of the skew correction section with respect to the transport direction; and a controller. Upon the detection of the width size-changed portion, the controller stops the substrate skew correction while continuously transporting the substrate. After the width size-changed portion of the substrate reaches a reference position downstream of the skew correction section, the controller restarts the skew correction.

A media processing device includes: a print head extending across a media path, and configured to apply indicia to media; a platen roller assembly adjacent to the print head, the print head configured to draw the media from a media supply along the media path travelling between the print head and the platen roller assembly, the platen roller assembly including: (i) a first platen roller extending across a first portion of a width of the media path, and (ii) a second platen roller coaxial with the first platen roller, and extending across a second portion of the width of the media path; a drive assembly coupled with the first and second platen rollers, the drive assembly configured to selectively drive rotation of either or both of the first and second platen rollers.

A printing device includes a first support portion, a second support portion movable in a moving direction of the second support portion toward and away from the first support portion, a movable probe movably supported by a detector, and a permission mechanism. The movable range consists of a first range and a second range. The permission mechanism is configured to permit the movable probe to move in accordance with the movement of the second support portion in the separating/approaching direction relative to the first support portion in a case where the movement of the second support portion is within the first range, and is also configured to prevent the movable probe from moving irrespective of further movement of the second support portion relative to the first support portion in a case where the movement of the second support portion is within the second range.