Sanyo Electric Co., Ltd.

Sanyo Electric., Ltd.

Akio Akao

Hiroshi Kano

Michio Kunimitsu

Hiroshi Tomita

Masato Takami

The thermal transfer printer of the present invention is provided with a cam follower mounted on a thermal transfer head in one body and an eccentric cam, which is controlled within a semicircle so as to be positioned at either a first position for releasing it from the cam follower to press the thermal transfer head to a platen or a second position for pressing it to release the thermal transfer head from the platen, as a construction for pressing the thermal transfer head to the platen and releasing the thermal transfer head from the platen, whereby the mechanism for pressing the thermal transfer head to the platen and releasing the thermal transfer head from the platen itself can be remarkably small-sized and is simple in action due to its remarkably small working quantity, the printer can be small-sized as a whole and improved in reliability of operation as well as durability. Furthermore, the thermal transfer printer can be stably carried out the subsequent controls after initial powering, since the positional relation between the thermal transfer head and the platen is controlled so as to be initially set to the predetermined relation without delay when it is initially powered.

Thermal transfer printer head position homing mechanism

The present invention relates to a method and a circuit for enhancing a fine line in the direction perpendicular to the arraying direction of the printing elements (i.e., in the direction of moving the printing paper) of a line printer which prints by applying either thermal elements or wires giving dot impact, and in which, for example, supposing the successive 4 printing elements comprising A, B, C and D, when the printing element C prints black and all others do white, the printing element C prints black and the other print while, the printing element B is made to print black to enhance a fine line by printing with two printing elements, so that the total visibility of the fine line is improved.

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Hirakata, Japan

Akio Akao