A printing apparatus includes a plurality of set units to set rolled print media, a conveyance unit to convey the print media, a printing unit, a detection unit, and display units. The printing unit prints an image on the print media conveyed by the conveyance unit. The detection unit detects whether any one of the print media is fed to a predetermined printable position at which printing is performable by the printing unit. Each display unit is provided on a different one of the plurality of set units and configured to indicate whether a print medium set in a corresponding set unit is being fed. When the printing unit performs printing on the print medium, each display unit indicates whether the print medium set in the corresponding set unit is being fed in accordance with a result of detection performed by the detection unit.

A printing apparatus includes a plurality of set units to set rolled print media, a conveyance unit to convey the print media, a printing unit, a detection unit, and display units. The printing unit prints an image on the print media conveyed by the conveyance unit. The detection unit detects whether any one of the print media is fed to a predetermined printable position at which printing is performable by the printing unit. Each display unit is provided on a different one of the plurality of set units and configured to indicate whether a print medium set in a corresponding set unit is being fed. When the printing unit performs printing on the print medium, each display unit indicates whether the print medium set in the corresponding set unit is being fed in accordance with a result of detection performed by the detection unit.

A printing device includes a roll paper holder configured to accommodate a first roll paper and a second roll paper and having first and second side walls configured to contact side surfaces of the first roll paper, a remaining amount detecting section having a first projection projecting from the first side wall to detect a remaining amount of the first roll paper accommodated in the roll paper holder, a roll paper guide configured to be installed in the roll paper holder and having a third side wall configured to contact a side surface of the second roll paper when the second roll paper is accommodated in the roll paper holder, and a detection assistance section provided on the roll paper guide and having a second projection projecting from the third side wall in a state of being in contact with the first projection.

Examples described herein relate to system and methods consistent with the disclosure. For instance, the imaging system comprises a tray to receive print media, a first sensor to detect a first printing event in the imaging system, a second sensor to detect a second printing event in the imaging system, and a processing resource to determine if the first sensor detected a first printing event, based on the first sensor detecting print media reaching or dropping below a threshold level in the tray, set a logic state based on determining if the first sensor detected the first printing event, maintain the set logic state responsive to the determination that the first sensor detected the first printing event until the second printing event is detected by the second sensor.

A printer includes a housing in which a sheet is stored in a rolled shape, a head by which an image is printed on the sheet, a flapper configured to pivot around an axis at a first end thereof including a surface extending from the first end to a second end of the flapper and biased to press the stored sheet against the housing, and a protrusion at the first end of the flapper that rotates around the axis as the flapper pivots, a sensor, and a controller configured to issue a signal when the protrusion is rotated around the axis to move into a detection range of the sensor.

An image forming system includes an image forming apparatus, a first conveyance path, a sheet feeding unit, a sheet post-processing unit, and a controller. The image forming apparatus has a first feed portion, and an image forming portion. The sheet feeding apparatus has a sheet stacking portion, a second feed portion, a relay conveyance portion, and a remaining amount detecting portion. When, during continuous printing, the existing number of recording sheets present in a conveyance passage from a confluence portion to the first feed portion is more than the constituting number of recording sheets contained in one bundle of sheets and in addition the sensing result of the remaining amount sensor is equal to or less than a predetermined amount, the controller controls first feed portion such that the existing number of the recording sheets is less than the constituting number of recording sheets.

In some examples, a non-transitory machine readable medium can include instructions executable by a processing resource to assert a low print media level notification responsive to determination that a first amount of print media in a media receptacle of an imaging device is less than a set value, detect a second amount of print media in the media receptacle of the imaging device, compare the detected second amount of print media to a print media threshold that is based on the set value and a selectable print media value, and maintain the low print media level notification responsive to a determination that the detected second amount of print media is less than the print media threshold.

A printer device includes a hopper configured to receive a roll of paper, a printing head, a conveyor, a flapper, and a remaining paper sensor. The printing head prints on the paper. The conveyor draws out an end of the paper from the roll and conveys the paper to the printing head. The flapper contacts an outer peripheral surface of the roll and presses the roll against an inner wall of the hopper at a drawing-out point where the paper is drawn out from the roll. The remaining paper sensor provides an indication that an amount paper remaining in the roll has reached a predetermined amount of paper.

There is provided a print apparatus and a media roll for the print apparatus, comprising a media identifier located on an end of a core section of the media roll. A type of media loaded into the print apparatus is determined by sensing the media identifier on the media roll using a non-contact sensor to scan the end of the core section.

A printing device includes a roll paper holder configured to accommodate a first roll paper and a second roll paper and having first and second side walls configured to contact side surfaces of the first roll paper, a remaining amount detecting section having a first projection projecting from the first side wall to detect a remaining amount of the first roll paper accommodated in the roll paper holder, a roll paper guide configured to be installed in the roll paper holder and having a third side wall configured to contact a side surface of the second roll paper when the second roll paper is accommodated in the roll paper holder, and a detection assistance section provided on the roll paper guide and having a second projection projecting from the third side wall in a state of being in contact with the first projection.