Tokyo Electric Co.

Kabushiki Kaisha Tec

Eiichi Furuya

Akira Suzuki

Akira Nuita

Tsuyoshi Matsushita

Tsugio Narushima

Tsutomu Fujiwara

Mamoru Tago

Narumi Kikuchi

Yutaka Wada

Hisao Suzuki

Katsuya Endo

The thermal head supporting device of the invention comprises a pair of positioning members disposed at both sides of a platen, a head press/release mechanism movable toward and away from the platen, and a head unit coupled with the head press/release mechanism. The positioning members are disposed coaxially with the platen. The head unit is formed of a head supporting member removably coupled to the head press/release mechanism with a predetermined play, a thermal head supported on the head supporting member and having a plurality of heating elements arranged in a straight line thereon and in confronting relationship with the platen, and a pair of engagement members attached to both sides of the thermal head adjustably for position, and each of the engagement members has a cutting formed therein allowing each positioning member to be removably fitted therein.

Thermal head supporting device

Disclosed is a method for driving a printer carrier. One power source is connected via a constant current circuit to the carrier motor. Data storing means stores the current command data corresponding to the acceleration, constant speed printing and deceleration of the carrier motor. According to the method, the current command data from the data storing means is latched in synchronism with a clock signal. The latched data is converted to a current reference voltage. The output current of the constant current drive circuit is varied in accordance with the current reference voltage. Changing the current command data as desired makes it possible to adjust freely the torque of the carrier motor for acceleration and deceleration on a constant voltage from one power source.

Printer carrier driving method

Growing community of inventors

Shizuoka, Japan

Eiichi Furuya