A printing device includes a main body, an opening/closing cover that is coupled to the main body and moves to an open position or a closed position, a roll paper holder provided on the main body and configured to accommodate a first roll paper, and a remaining amount detecting section that detects a remaining amount of the first roll paper accommodated in the roll paper holder, and the remaining amount detecting section shifts from a first state in which the remaining amount of the first roll paper is not detected to a second state in which the remaining amount of the first roll paper is detected, with movement of the opening/closing cover from the open position to the closed position.

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.

To use roll paper up to a terminal end of a last printing sheet and prevent the printing sheet from dropping after printing on the last printing sheet in a printer, the last printing sheet is stopped such that a side downstream of the terminal end of the last printing sheet in a feeding direction is located at a nipping position where the printing sheet is nipped by a thermal head and a platen roller if the terminal end of the last printing sheet in the roll paper is detected.

An example media handling system includes a web media holder with a core hub capable of coupling to a core of a web media roll, a sensor to take a measurement at the circumferential surface of the web media roll, and a controller to determine a length of the web media roll. In that example, the controller may determine the length of the web media roll based on a first distance measurable by the sensor when the core hub is in a first orientation, a second distance measureable by the sensor when the core hub is in a second orientation after a number of rotations with respect to the first orientation of the core hub, and reference value corresponding to the core.

In an example, an indicator may comprise an arm pivotally disposed within a media tray, an indicator plate movably coupled to the media tray, and a latch engaged with the arm and the indicator plate. The media tray may receive print media. The latch may support the indicator plate in a raised position, and the latch may release the indicator plate to a lowered position upon the arm pivoting the latch from a latched position to a released position.

An example printing device may comprise a first sensor to detect when a media pathway is blocked, where the first sensor may send a first signal to a light source to display a first brightness when the media pathway is blocked, and a second sensor to detect when a supply area door is in an open position, where the second sensor is to send a second signal to the light source to display a second brightness when the supply area door is in an open position.

A printing device includes a main body, an opening/closing cover that is coupled to the main body and moves to an open position or a closed position, a roll paper holder provided on the main body and configured to accommodate a first roll paper, and a remaining amount detecting section that detects a remaining amount of the first roll paper accommodated in the roll paper holder, and the remaining amount detecting section shifts from a first state in which the remaining amount of the first roll paper is not detected to a second state in which the remaining amount of the first roll paper is detected, with movement of the opening/closing cover from the open position to the closed position.

In a printing apparatus for performing printing on labels of roll paper formed by winding a label sheet with the labels peelably attached to the label sheet, a label remaining number detecting unit, during a printing operation, determines a thickness of the label sheet from a length between the labels included in the label sheet fed out from a label sheet feed-out unit to a printing unit, the length being determined by a label length detecting unit while a distance to a cylindrical outer surface of the roll paper detected by a distance sensor.

An example media handling system includes a web media holder with a core hub capable of coupling to a core of a web media roll, a sensor to take a measurement at the circumferential surface of the web media roll, and a controller to determine a length of the web media roll. In that example, the controller may determine the length of the web media roll based on a first distance measurable by the sensor when the core hub is in a first orientation, a second distance measureable by the sensor when the core hub is in a second orientation after a number of rotations with respect to the first orientation of the core hub, and reference value corresponding to the core.

To use roll paper up to a terminal end of a last printing sheet and prevent the printing sheet from dropping after printing on the last printing sheet in a printer, the last printing sheet is stopped such that a side downstream of the terminal end of the last printing sheet in a feeding direction is located at a nipping position where the printing sheet is nipped by a thermal head and a platen roller if the terminal end of the last printing sheet in the roll paper is detected.