The present invention provides a thermal print head capable of better performing printing on a printing medium.

The thermal print head includes: a substrate (1), formed with single crystal semiconductor; a resistor layer (4), including a plurality of heating portions (41) arranged in a main scan direction; and a wiring layer (3), configuring a charging path to the plurality of heating portions. The substrate includes: a main surface (11), being a surface opposite to the resistor layer; and a convex portion (13), disposed as protruding from the main surface and extending in the main scan direction. The convex portion includes: an inclining surface (132), inclining relative to the main surface and extending in a linear manner when viewing from the main scan direction; and a curving surface (131), disposed, in a protruding direction of the convex portion, on a position farther away from the main surface than the inclining surface, and curving in a manner that protrudes toward the protruding direction. Each of the plurality of heating portions includes a heating curving portion (411) formed on a portion corresponding to the curving surface.

The present disclosure provides a thermal print head. The thermal print head includes a substrate having a main surface and a convex portion and including a semiconductor material; a resistor layer including a plurality of heat generating portions located on the convex portion; and a wiring layer conducted to the plurality of heat generating portions and formed to contact the resistor layer. The convex portion has a top surface, a first inclined surface and a second inclined surface. The first inclined surface and the second inclined surface are disposed between the main surface and the top surface, separated from each other in a sub-scanning direction, and tilted with respect to the main surface. A first tilted angle of the first inclined surface with respect to the main surface and a second tilted angle of the second inclined surface with respect to the main surface are greater than 55 degrees.

The present disclosure provides a thermal print head. The thermal print head includes a substrate having a main surface and a convex portion and including a semiconductor material; a resistor layer including a plurality of heat generating portions located on the convex portion; and a wiring layer conducted to the plurality of heat generating portions and formed to contact the resistor layer. The convex portion has a top surface, a first inclined surface and a second inclined surface. The first inclined surface and the second inclined surface are disposed between the main surface and the top surface, separated from each other in a sub-scanning direction, and tilted with respect to the main surface. A first tilted angle of the first inclined surface with respect to the main surface and a second tilted angle of the second inclined surface with respect to the main surface are greater than 55 degrees.

The compact thermal printing mechanism according to the invention is applicable for handheld payment terminals. The invention provides a printer chassis (1) with reinforced flat area (20) by at least one reinforcing element comprising a fold of the printer chassis (1). This folded portion of the printer chassis strengthens the chassis and provides a very strong resistance to bending forces of the lateral pressure means (18) of the platen roller (6). The stable and uniform pressure distribution across the paper width ensures uniform print quality.

A thermal printer, includes a head unit including a thermal head configured to perform printing on a recording sheet; a platen unit, which includes a platen roller configured to convey the recording sheet, and is separably combined with the head unit; a printer main body, which has a recording-sheet receiving portion configured to receive the recording sheet, and has the head unit mounted thereto; a printer cover, which has the platen unit mounted thereto, and is coupled to the printer main body so as to be pivotable; and a separator, which is provided in the recording-sheet receiving portion, and is configured to separate parts of the recording sheet, which is rolled into a roll shape around a core body, folded on each other at a rolling start portion, which is rolled around the core body and has a turn-back shape.

A tape includes: a sheet; first and second media arranged adjacent to each other in a longitudinal direction of the sheet, spaced from each other, and peelably stuck to the sheet; a first separating line extending between first and second ends of the sheet in a widthwise direction between the first and second media; and a second separating line formed at a portion of the sheet which is located between a center position of the second medium in the widthwise direction and a first end of the second medium in the widthwise direction. The second separating line is formed at at least a portion of the sheet which is located between first and second ends of the second medium in the longitudinal direction. Each of the first and second separating lines includes a portion formed through or cut in the sheet in a thickness direction.

A printing device 1 includes a platen roller 7 which feeds a thermal tape 42, a thermal head 8 which performs printing on the thermal tape 42, and a control circuit 12. The control circuit 12 rotates the platen roller 7 backward to feed the thermal tape 42 backward in order to make a printing start area PT of the thermal tape 42 reach a backward feed position more away from an outlet 2b than a normal position NP of the thermal head 8. After that, the control circuit 12 rotates the platen roller 7 forward to perform printing using the thermal head 8.

A printing device 1 includes a platen roller 7 which feeds a thermal tape 42, a thermal head 8 which performs printing on the thermal tape 42, and a control circuit 12. The control circuit 12 rotates the platen roller 7 backward to feed the thermal tape 42 backward in order to make a printing start area PT of the thermal tape 42 reach a backward feed position more away from an outlet 2b than a normal position NP of the thermal head 8. After that, the control circuit 12 rotates the platen roller 7 forward to perform printing using the thermal head 8.

An example of an imaging medium includes a substrate, a color-forming layer on the substrate, and a registration mark. The color-forming layer includes a repeated pattern. A repeat of the pattern includes four adjacent color-forming stripes including a black-forming stripe, a cyan-forming stripe, a magenta-forming stripe, and a yellow-forming stripe, or a grid of four color-forming sections including i) a color-forming section selected from the group consisting of black-forming, cyan-forming, light cyan-forming, yellow-forming, magenta-forming, and light magenta-forming, ii) a cyan-forming section, iii) a magenta-forming section, and iv) a yellow-forming section.

An embodiment of the present invention is a thermal head including: a heat dissipation plate having a first surface of a substantially rectangular shape in a plane view, and a second surface that is on an opposite side to the first surface; a board attached to the heat dissipation plat in such a manner as to extend from the first surface to the second surface, via a first end part interposed between the first surface and the second surface; a heating part having a plurality of heating elements, the heating part being disposed on the board over the first surface; and surface-mount devices mounted on the board over the second surface.