Arrangement for driving a printing head along a printing line

Details Arrangement for driving a printing head along a printing line Arrangement for driving a printing head along a printing line

1978-08-14

1981-08-25

Sewell, Paul T.

Typewriting machines

Carriage or carriage-moving or movement-regulating mechanism

Carriage-return mechanism

400322, B41J 1930, B41J 1970

Patent

active

042856060

ABSTRACT:
An arrangement for driving the printing head along a printing line of a recording medium comprises a reversible direct-current electric motor which is coupled to the head for moving the latter forwards and backwards along the printing line. The head prints only during the forwards movement and during this movement the motor is supplied with a first voltage which causes the forwards movement of the head at a first substantially constant velocity. After the printing of a last character the head is moved away from the recording medium by an electromagnet and the motor is supplied with a second voltage which causes the backwards movement of the head at a second substantially constant velocity, greater than the first velocity. During the backwards movement of the head two rollers advance the recording medium and held it tensioned in correspondence with the printing line.

REFERENCES:
patent: 2664988 (1954-01-01), Metzner
patent: 3292530 (1966-12-01), Martin
patent: 3628645 (1971-12-01), McFeaters et al.
patent: 3854563 (1974-12-01), Cowardin et al.
patent: 3855448 (1974-12-01), Hanagata
patent: 3858702 (1975-01-01), Azuma
patent: 3865033 (1975-02-01), Taguchi et al.
patent: 3882988 (1975-05-01), Sloan et al.
patent: 3910395 (1975-10-01), Colglazier et al.
patent: 4034842 (1977-07-01), Giacone
patent: 4039065 (1977-08-01), Seki et al.
D.C. Power Supply Handbook, 1970, Hewlett-Packard Co., pp. 29-30.

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