Automatic print wheel element changing mechanism for a serial pr

Details Automatic print wheel element changing mechanism for a serial pr Automatic print wheel element changing mechanism for a serial pr

1980-01-14

1981-08-04

Pieprz, William

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Plural type-set-assemblages selectively movable from a...

400151, B41J 354

Patent

active

042819385

ABSTRACT:
A type element interchange mechanism is incorporated into a high speed serial printer with rotary print wheel and linear carriage movement. A number of print wheels are selectively mountable onto a carriage, which carries a print wheel, print hammer, and print hammer solenoid, from one or more removable carousels, each carousel typically carrying several different type font print wheels. Print wheels are transferred directly between the carriage and a carousel, without the necessity of intermediate transfer mechanisms or steps, through the controlled linear translation of the carriage and the carousel. The print wheel-carrying carousel has a plurality of arms and is rotated to present the desired arm in position for transfer of a print wheel with the carriage. Microprocessor controls are provided so that print wheel changes are implemented automatically in response to input signals defining the desired font type. A computer controlled initialization program is provided which in addition to providing a startup and reset procedure also automatically identifies the print wheel identification numbers by reading coded slots located in the center hub of the print wheels.

REFERENCES:
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patent: 4214837 (1980-07-01), Bacher
patent: 4217055 (1980-12-01), Moon
Blean, "Automatic Print Wheel Loader", IBM Technical Disclosure Bulletin, vol. 18, No. 10, pp. 3350-3351 3/76.
Kollar et al., "Multiple Belt Photocomposer", IBM Technical Disclosure Bulletin, vol. 10, No. 4, pp. 418-419 9/67.
Cooper, "Electronic Typewriter Type Font Coding", IBM Technical Disclosure Bulletin, vol. 19, No. 11, p. 4242, 4/1977.

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