A sheet detection device includes a sheet guide disposed between a sheet feeding opening into which a sheet is inserted and a printing mechanism of printing on the sheet, the sheet guide including a guide surface through which the sheet passes, a sheet detector including an optical sensor that detects a predetermined position of the sheet, an opening formed in the guide surface, the sheet detector being disposed inside the opening and the optical sensor being exposed through the opening, and a transparent guide cover provided in the guide surface to cover at least a first border position between the sheet detector and the opening on an upstream side in a sheet transport direction.

Certain examples described herein relate to printing systems and methods of operating the same. In an example of a printing system, a porosity determiner determines a porosity of a print medium and a signal generator generates a signal relating to a state of a printing fluid collector based on the porosity determined. In an example of a method of operating a printing system, a pressure measurement is obtained from a vacuum system of the printing system when a print medium is present on a media path of the printing system. This is compared to at least one predefined pressure range and, based on the comparison, an indication is provided setting out a state of a printing fluid collector.

In accordance with an embodiment, a label printer comprises a transmission type sensor configured to enable a first light emitting element to emit light to irradiate a printing medium with the light and to detect light transmitted through the printing medium; a reflection type sensor configured to enable a second light emitting element to emit light to irradiate a printing medium with the light and to detect light reflected by the printing medium; and a light emission control module configured to alternately switch a single light emission period in which either the first light emitting element or the second light emitting element emits light and a both light emission period in which both the first light emitting element and the second light emitting element emit light.

An electrode manufacturing apparatus according to one aspect of the present disclosure is configured to discharge a liquid to form a resin layer or an inorganic layer on an electrode substrate which is being conveyed in a predetermined direction. The electrode manufacturing apparatus includes a detector, a liquid discharger provided downstream of the detector in the predetermined direction and configured to discharge the liquid to form the resin layer or the inorganic layer, and a controller configured to control a discharge condition of the liquid discharger. Points where a property varies are present on the electrode substrate along a direction intersecting the predetermined direction. The detector outputs pieces of detection information obtained by detecting one of the points in time series, and the controller controls the discharge condition of the liquid discharger based on combined detection information obtained by combining the pieces of detection information.

A printer for direct printing on a print substrate comprises a front support supporting a printing device; the front support to be arranged at a front side of a print substrate and to be aligned relative to a rear support across the print substrate in a contact-less manner.

A paper size detection device comprises a first actuator comprising a plurality of operating arms and a first detection arm to move in association with movement of the plurality of operating arms, the plurality of operating arms having lengths or angles different from each other; a first sensor to output different results in accordance with a position of the first detection arm; a second actuator comprising one operating arm and a second detection arm to move in association with movement of the one operating arm; and a second sensor to output different results in accordance with a position of the second detection arm.

A sheet supplying apparatus, which is capable of winding a sheet tightly, includes a driving unit configured to cause a roll including a wound consecutive sheet to rotate in a first direction for feeding the sheet or a second direction opposite to the first direction, a sensor that detects a leading end portion of the sheet separated from an outer circumferential surface of the roll, and a contact body that presses the outer circumferential surface. Before the sheet is fed, in a state in which the contact body presses the outer circumferential surface, the driving unit causes the roll to continuously rotate in the second direction until a detection cycle of the leading end portion by the sensor is less than a predetermined value.

A recording apparatus includes a cassette or a feeding tray that is configured to mount a medium thereon, a transport unit that transports the medium mounted on the cassette or the feeding tray, and a recording head that performs recording on the medium. Furthermore, the recording apparatus includes a medium detection device and a deviation amount acquisition section. The medium detection device detects at least one of both side edges in a width direction intersecting a transport direction of the medium that is transported from the cassette or the feeding tray (step S12). The deviation amount acquisition section acquires a deviation amount of the recording head in the width direction of the medium based on at least one side edge detection position detected by the medium detection device (step S13).

A recording apparatus including a recording head that performs recording, a feed roller that feeds out a set medium, a transport driving roller that transports the medium, which is fed out by the feed roller, towards an opposing position that opposes the recording head, and an auxiliary roller provided between the feed roller and the transport driving roller, the auxiliary roller assisting transportation of the medium. When the apparatus is seen from a side of the apparatus, the auxiliary roller overlaps the feed roller in a height direction of the apparatus.

A medium-discharging device includes: a medium-discharging section that discharges a medium; a medium-receiving tray that receives the medium discharged by the medium-discharging section; a light-emitting section that emits light to the medium-receiving tray; and a control section that controls the light-emitting section, in which the medium-receiving tray is configured to switch between a first state in which the medium-receiving tray is stored in an apparatus main body that includes the medium-discharging section and a second state in which the medium-receiving tray protrudes from the apparatus main body, and the control section controls the light-emitting section in accordance with a state or operation of the medium-receiving tray.