In a printer, an accommodating portion accommodates roll paper. A supply roller pair is disposed upstream of a recording unit in a transport direction, and nips the roll paper. The intermediate roller pair is rotatably disposed between the supply roller pair and the accommodating portion, and nips the roll paper. A second motor and a third motor apply tension to the roll paper between the intermediate roller pair and the accommodating portion. A control unit can switch between a first mode and a second mode. In the first mode, first tension is applied to the roll paper between the intermediate roller pair and the accommodating portion. In the second mode, second tension smaller than the first tension is applied.

A medium-discharging device includes: a device main body including a medium-discharging section that discharges a medium; a medium-receiving tray that receives the medium discharged by the medium-discharging section; and a pressing member that is configured to be attached to and detached from to the device main body and presses the medium discharged by the medium-discharging section against the medium-receiving tray in a state in which the pressing member is attached to the device main body, in which the pressing member is configured to switch, in the state in which the pressing member is attached to the device main body, between a first state in which the pressing member comes into contact with the medium-receiving tray and a second state in which the pressing member retreats upward so as to be apart from the medium-receiving tray.

A medium-discharging device includes: a device main body including a medium-discharging section that discharges a medium; a medium-receiving tray that receives the medium discharged by the medium-discharging section; and a pressing member that is configured to be attached to and detached from to the device main body and presses the medium discharged by the medium-discharging section against the medium-receiving tray in a state in which the pressing member is attached to the device main body, in which the pressing member is configured to switch, in the state in which the pressing member is attached to the device main body, between a first state in which the pressing member comes into contact with the medium-receiving tray and a second state in which the pressing member retreats upward so as to be apart from the medium-receiving tray.

A sheet transport device includes a processor configured to adjust movement of a transport unit that transports a sheet on the basis of a transport load of the sheet.

A sheet processing machine stores sheets transported by a transport unit. The sheet processing machine includes: a reel on which a first end side of a tape is wound; a first stepper motor that rotates the reel about a rotation axis of the reel; a drum configured to wind up a second end side of the tape together with the sheets to form a winding body together with the tape and the sheets; a second stepper motor that rotates the drum about a rotation axis of the drum; and circuitry configured to change an interval between the sheets wound on the drum by controlling a rotation of the first stepper motor and the second stepper motor based on a parameter indicating a condition of the winding body.

A printing medium feeding device includes a loading unit into which a printing medium is loaded, a pickup roller which picks up the loaded printing medium, a retard roller, a forward roller engaged with the retard roller to feed the picked-up printing medium in a first direction, a torque limiter to apply torque in a second direction opposite to the first direction to the retard roller, and a processor. The processor controls driving of the forward roller by generating a pre-driving signal to change a torque state of the torque limiter to an effective torque state for preventing multi-feeding of printing media and controls driving of the forward roller by generating a driving signal to feed the printing medium in the first direction.

A sheet processing machine stores sheets transported by a transport unit. The sheet processing machine includes: a reel on which a first end side of a tape is wound; a first stepper motor that rotates the reel about a rotation axis of the reel; a drum configured to wind up a second end side of the tape together with the sheets to form a winding body together with the tape and the sheets; a second stepper motor that rotates the drum about a rotation axis of the drum; and circuitry configured to change an interval between the sheets wound on the drum by controlling a rotation of the first stepper motor and the second stepper motor based on a parameter indicating a condition of the winding body.

A device for imparting a torsional force onto a wire has a base and a support mounted so as to be rotatable with respect to the base around an axis of rotation. The axis of rotation coincides with a wire path extending through the base and the support. Further, a wire clutching device is mounted on the support and adapted to engage at a wire guided along the wire path, and a rotation mechanism is provided which is adapted for rotating the support with respect to the base.

A medium conveying apparatus includes a medium tray, a feed roller to feed media placed on the medium tray in order from the lower side, a brake roller located to face the feed roller, a torque limiter to control a load applied to the brake roller, and a changing member to change a limit value of a torque of the torque limiter according to a height of the media placed on the medium tray.

A label printer includes a print head configured to perform printing on a label sheet, a transporting roller configured to transport the label sheet downstream, a peeling roller configured to transport a backing sheet in a direction different from a travelling direction of a label to peel the label from the backing sheet, and a control unit configured to control rotation of the transporting roller and rotation of the peeling roller, wherein a maximum friction force between the transporting roller and the label sheet are set such that the maximum friction force between the peeling roller and the backing sheet is not greater than a transport force of the peeling roller so as to make a transport error of the label sheet by the transporting roller within an acceptable value.