Printer with a motor controlled by chopping means

Details Printer with a motor controlled by chopping means Printer with a motor controlled by chopping means

1985-12-27

1988-05-24

Pearson, Charles A.

Typewriting machines

Having power-driven operator for plural functions

Usable selectively

4001442, 400214, 4001571, B41J 2334

Patent

active

047462361

ABSTRACT:
A printer in which a daisy wheel on a carriage is caused, by a hammer actuating mechanism, to impact against a printing sheet fed by a sheet feed mechanism, so that the sheet is printed with use of a ribbon interposed between the sheet and the wheel. The hammer actuating mechanism, a printing ribbon feed mechanism, a correction ribbon feed mechanism, and a correction ribbon lift mechanism constituting a first driven section, and the sheet feed mechanism constituting a second driven section, are connected to a single DC motor by means of clutch means. In driving the first driven section, the motor is supplied with a predetermined supply voltage from an external power source. In driving the second driven section, the motor is supplied with a supply voltage chopped by chopping means so that the second driven section is driven with a smaller driving force and at a lower rotating speed than the first driven section is.

REFERENCES:
patent: 3636867 (1972-01-01), Bonzano
patent: 3663880 (1972-05-01), Gabor
patent: 3760925 (1973-09-01), Bossi
patent: 3825103 (1974-07-01), Riley
patent: 3843912 (1974-10-01), Anderson
patent: 3972280 (1976-08-01), Swatik et al.
patent: 4338035 (1982-07-01), Kondo et al.
patent: 4376585 (1983-03-01), Fromme et al.
patent: 4395149 (1983-07-01), Longrod
patent: 4402073 (1983-08-01), Hammond
patent: 4472073 (1984-09-01), Valle et al.
patent: 4480938 (1984-11-01), Polk et al.
patent: 4538931 (1985-09-01), Nagashima

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