A printer for security paper, such as a multifunction printer, a printer, a facsimile machine or a copier, is configured to perform a printing operation by distinguishing between security paper and normal paper. The printer for security paper includes: a security paper sensor disposed on a printing paper feeding path; and a control unit for comparing a first sensing value sensed by the security paper sensor when printing paper to be determined is not present near the security paper sensor with one or more second sensing values sensed by the security paper sensor for the corresponding printing paper on the feeding path, during the course of conveying the corresponding printing paper on the feeding path, determining printing paper as security paper when a comparison value is above a predefined reference value, and determining printing paper as normal paper when the comparison value is below the predefined reference value.

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 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 liquid ejection apparatus includes a conveying unit, a winding unit, a printing unit, and a rotation control unit. The conveying unit is configured to intermittently convey a printing medium by a predetermined feed amount. The winding unit is configured to wind the printing medium conveyed by the conveying unit. The printing unit is configured to perform printing on the conveyed printing medium. The rotation control unit is configured to control the winding unit to rotate in a winding direction at a predetermined timing after the conveying unit has started to convey the printing medium intermittently, and then cause the winding unit to rotate in a reverse direction opposite to the winding direction.

A liquid ejection apparatus includes a conveying unit, a winding unit, a printing unit, and a rotation control unit. The conveying unit is configured to intermittently convey a printing medium by a predetermined feed amount. The winding unit is configured to wind the printing medium conveyed by the conveying unit. The printing unit is configured to perform printing on the conveyed printing medium. The rotation control unit is configured to control the winding unit to rotate in a winding direction at a predetermined timing after the conveying unit has started to convey the printing medium intermittently, and then cause the winding unit to rotate in a reverse direction opposite to the winding direction.

A printer for security paper, such as a multifunction printer, a printer, a facsimile machine or a copier, is configured to perform a printing operation by distinguishing between security paper and normal paper. The printer for security paper includes: a security paper sensor disposed on a printing paper feeding path; and a control unit for comparing a first sensing value sensed by the security paper sensor when printing paper to be determined is not present near the security paper sensor with one or more second sensing values sensed by the security paper sensor for the corresponding printing paper on the feeding path, during the course of conveying the corresponding printing paper on the feeding path, determining printing paper as security paper when a comparison value is above a predefined reference value, and determining printing paper as normal paper when the comparison value is below the predefined reference value.

A printing apparatus includes a print section, a supply path, a correction roller pair, an adjusting mechanism and a controller. The print section is configured to perform printing on a medium. The supply path is configured to supply the medium to the print section. The correction roller pair is configured to enable the medium transported on the supply path to strike the correction roller pair to correct skewing of the medium. The adjusting mechanism adjusts a nip load applied to the correction roller pair. The controller is configured to control the adjusting mechanism based on print job information. The correction roller pair includes a driving roller that has a plurality of convex portions disposed on a peripheral surface along a circumferential direction of the driving roller and a driven roller that is disposed to face the driving roller to be driven by the driving roller.

A printing apparatus includes a print section, a supply path, a correction roller pair, an adjusting mechanism and a controller. The print section is configured to perform printing on a medium. The supply path is configured to supply the medium to the print section. The correction roller pair is configured to enable the medium transported on the supply path to strike the correction roller pair to correct skewing of the medium. The adjusting mechanism adjusts a nip load applied to the correction roller pair. The controller is configured to control the adjusting mechanism based on print job information. The correction roller pair includes a driving roller that has a plurality of convex portions disposed on a peripheral surface along a circumferential direction of the driving roller and a driven roller that is disposed to face the driving roller to be driven by the driving roller.

An image forming apparatus performs skew correction by bringing a leading end of a conveyed sheet in contact with a registration roller pair being in a stopped state and by forming a first loop with a loop roller pair, and thereafter, refeeds the sheet to an image former by adjusting timing. In a case of feeding a sheet with a length equal to or longer than a prescribed length, after having formed the first loop, the image forming apparatus forms a second loop in a loop accommodator that is disposed on an upstream side than the loop roller pair and accommodates a formed loop.

A printing apparatus includes a print section, a supply path, a correction roller pair, an adjusting mechanism and a controller. The print section is configured to perform printing on a medium. The supply path is configured to supply the medium to the print section. The correction roller pair is configured to enable the medium transported on the supply path to strike the correction roller pair to correct skewing of the medium. The adjusting mechanism adjusts a nip load applied to the correction roller pair. The controller is configured to control the adjusting mechanism based on print job information. The correction roller pair includes a driving roller that has a plurality of convex portions disposed on a peripheral surface along a circumferential direction of the driving roller and a driven roller that is disposed to face the driving roller to be driven by the driving roller.