A printer includes a body including a label sheet storage location and a cover rotatably attached to the body and covering the storage location when closed. The cover includes a roller having a shaft that is used for conveying the label sheet when the cover is closed and a peeling bar extending above the roller. The body includes a pressing member extending along the direction and pressing the sheet against the bar for peeling a label from the label sheet and a release lever arranged at an end of the pressing member. The release lever has a recess and rotates between a first position at which the shaft fits into the recess and a second position at which the shaft is released. The release lever rotates from the first to second positions to open the cover when a release button is pressed.

A printer includes a body including a label sheet storage location and a cover rotatably attached to the body and covering the storage location when closed. The cover includes a roller having a shaft that is used for conveying the label sheet when the cover is closed and a peeling bar extending above the roller. The body includes a pressing member extending along the direction and pressing the sheet against the bar for peeling a label from the label sheet and a release lever arranged at an end of the pressing member. The release lever has a recess and rotates between a first position at which the shaft fits into the recess and a second position at which the shaft is released. The release lever rotates from the first to second positions to open the cover when a release button is pressed.

A sticker machine, for peeling a sticker from a liner paper during a conveying process of the sticker. The sticker machine includes a turning peeling portion, configured to cause the sticker to be peeled from the liner paper by conveying the liner paper in a direction different from a travel direction of the sticker; and a sticker guiding portion, configured to guide the sticker to be conveyed in a prescribed direction to the turning peeling portion, for causing the sticker after being peeled to enter an output port. In a conveying direction of the sticker, the sticker guiding portion is disposed at a position further upstream than the turning peeling portion.

In some embodiments, a handheld label application device includes a housing assembly, a print head mounted inside the housing assembly and configured to print on a label, and a sensor positioned inside the housing assembly, wherein the sensor is configured to detect at least one optical attribute of a label before it is printed on by the printer.