A printer may include a printhead assembly, a clutch assembly, and/or a printer ribbon transport assembly. An example clutch assembly includes a first spool engagement member defining a first friction torque; a first friction member configured to frictionally engage the first spool engagement member; a second spool engagement member defining a second friction torque that is larger than the first fiction torque; and a second friction member configured to frictionally engage the second spool engagement member.

A printing apparatus includes a printing cylinder (17) that holds and transfers a sheet (4), a supply-side transfer cylinder (16 (sheet supply unit)) that supplies the sheet (4) to the printing cylinder (17) at a supply position (P1), and first to fourth inkjet heads (27-30). The printing apparatus includes a transfer mechanism (18) that receives the sheet (4) after printing at a receiving position (P2) and transfers the sheet (4) to one of a discharge route (44) and a reversing route (42). The reversing route (42) employs an arrangement that returns the reversed sheet (4) to the printing cylinder (17) at a return position (P3) located on the downstream side of the receiving position (P2) in the transfer direction of the sheet (4) and on the upstream side of the supply position (P1) in the transfer direction of the sheet (4). A cooling means (45) for cooling the transfer surface (24 (outer peripheral surface)) of the printing cylinder (17) is provided between the receiving position (P2) and the return position (P3). It is possible to provide the printing apparatus that suppresses an increase in the temperature of the transfer surface of the printing cylinder and always sets the temperature of the sheet at an appropriate temperature.

A thermal head includes a substrate, an electrode, and a gap. The electrode is located on the substrate. The gap is located between the substrate and the electrode. The thermal head contains glass in an inner portion of the gap.

The present disclosure provides a substrate for a thermal print head. The substrate for the thermal print head includes: a main surface on which a ridge portion is formed; a base material; and a glaze layer. The ridge portion extends along a first direction in a plan view and is formed of a pedestal portion which is a part of the base material and the glaze layer disposed on a top surface of the pedestal portion. A hollow portion is disposed inside the glaze layer.

A cooling control system and method comprise a power meter for measuring a power of a laser, a temperature controller configured to adjust a temperature of fluid circulating through a cooling block, and a chip connected to the cooling block wherein the temperature controller regulates said temperature of the coolant in order to prevent the chip from overheating or from developing condensation on the chip.

An illustrative heating section in a dye sublimation apparatus may include one or more individually controllable fans. More specifically, a computer or a controller may control speed and/or orientation of the fans for a convective heat transfer to a printed sheet in the heating section. Furthermore, the speed and/or orientation of the fans may be dynamically adjusted based upon the temperature requirement of different stages of the dye sublimation process. Compared to the conventional systems that rely only upon radiative heat which generally results in non-uniform heat distribution within the heating section, the embodiments disclosed herein generate a uniform or nearly uniform heat distribution and also avoid hot spots within the heating 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.

An insulating substrate comprises a ceramic substrate having a major surface, a plurality of first ribs formed on the major surface, and a glaze layer disposed on the major surface so as to cover the plurality of first ribs. The plurality of first ribs in plan view extend in a first direction and are spaced in a second direction orthogonal to the first direction and thus aligned.

A thermal head includes: a heat dissipation plate having a first surface, and a second surface that is on an opposite side to the first surface; a board attached to the heat dissipation plate, the board having a first part located on the first surface, a second part located on the second surface, and an end part connecting the first part and the second part; a heat generating part including a plurality of heating elements, the heat generating part being disposed over the first surface; and at least one surface-mount device mounted on the board over the second surface.

Provided herein is a printhead for a printing apparatus. The printhead comprises a first burn line of heating elements disposed on a first surface of the printhead, and a second burn line of heating elements disposed on a second surface of the printhead. The second surface is opposite to the first surface. Thereafter, one of the first burn line of heating elements or the second burn line of heating elements is configured to perform a printing operation.