Textiles: fiber preparation
Patent
1975-05-08
1977-07-12
Burr, Edgar S.
Textiles: fiber preparation
197133R, B41J 1930, B41J 1992
Patent
active
040348423
ABSTRACT:
An arrangement for driving a 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: 3292530 (1966-12-01), Martin
patent: 3628645 (1971-12-01), McFeaters et al.
patent: 3684075 (1972-08-01), Staller et al.
patent: 3854563 (1974-12-01), Cowardin et al.
patent: 3855448 (1974-12-01), Hanagata et al.
patent: 3858702 (1975-01-01), Azuma
patent: 3865033 (1975-02-01), Taguchi et al.
patent: 3882988 (1975-05-01), Sloan et al.
DC Power Supply Handbook, 1970, Hewlett-Packard Co., pp. 29-30.
Burr Edgar S.
Ing. C. Olivetti & C. S.p.A.
Sewell Paul T.
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