Abstract: A portable printer device is capable of holding a plurality of paper rolls. The portable printer device comprises a single printing portion which is provided for printing of each of the plurality of paper rolls. A paper roll hold device includes a plurality of paper roll hold portions each of which holds one of the plurality of paper rolls, and includes a plurality of paper passages each of which is provided to deliver a paper from one of the plurality of paper roll hold portions to the printing portion.

Abstract: A thermal printer, including a drive platen, which has its external dimensions reduced to a level suitable for use in connection with portable information apparatuses. The thermal printer includes a thermal head; a platen cooperating with the thermal head to nip a printing sheet between the platen and the thermal head; an elastic member elastically pressing the thermal head and the platen to each other; a frame carrying the thermal head in a fixed manner and the platen in a movable manner relative to the thermal head; and a drive mechanism driving the platen. The drive mechanism includes a rotation drive source, a gearing unit for transmitting a torque from the rotation drive source to the platen, and a pivot member capable of pivoting about a rotation axis of a gear, arranged prior to the platen in the gearing unit, together with the platen and following gears arranged behind the prior or former gear.

Abstract: A portable printer device is capable of holding a plurality of paper rolls. The portable printer device comprises a single printing portion which is provided for printing of each of the plurality of paper rolls. A paper roll hold device includes a plurality of paper roll hold portions each of which holds one of the plurality of paper rolls, and includes a plurality of paper passages each of which is provided to deliver a paper from one of the plurality of paper roll hold portions to the printing portion.

Abstract: A roll paper cutter, for cutting roll paper which is fed out from a roll of paper so that it can be separated from an outer circumference of the roll of paper, comprises: a rail extending in the longitudinal direction of the rail perpendicular to the roll paper feeding direction; a stationary knife fixed at and supported by a carriage moving along the rail in the longitudinal direction of the rail; and a rotary knife pivotally supported by the carriage and rotated coming into contact with the stationary knife when the carriage is moved. When the carriage is moved in the longitudinal direction of the rail, a cutting edge intersection formed by the rotary knife, which is rotated by the movement of the carriage, and also formed by the stationary knife crosses and cuts the roll paper in the width direction.

Abstract: A thermal printer, including a drive platen, which has its external dimensions reduced to a level suitable for use in connection with portable information apparatuses. The thermal printer includes a thermal head; a platen cooperating with the thermal head to nip a printing sheet between the platen and the thermal head; an elastic member elastically pressing the thermal head and the platen to each other; a frame carrying the thermal head in a fixed manner and the platen in a movable manner relative to the thermal head; and a drive mechanism driving the platen. The drive mechanism includes a rotation drive source, a gearing unit for transmitting a torque from the rotation drive source to the platen, and a pivot member capable of pivoting about a rotation axis of a gear, arranged prior to the platen in the gearing unit, together with the platen and following gears arranged behind the prior or former gear.

Abstract: A roll paper cutter, for cutting roll paper which is fed out from a roll of paper so that it can be separated from an outer circumference of the roll of paper, comprises: a rail extending in the longitudinal direction of the rail perpendicular to the roll paper feeding direction; a stationary knife fixed at and supported by a carriage moving along the rail in the longitudinal direction of the rail; and a rotary knife pivotally supported by the carriage and rotated coming into contact with the stationary knife when the carriage is moved. When the carriage is moved in the longitudinal direction of the rail, a cutting edge intersection formed by the rotary knife, which is rotated by the movement of the carriage, and also formed by the stationary knife crosses and cuts the roll paper in the width direction.