Encoded print wheel system

Details Encoded print wheel system Encoded print wheel system

1976-09-01

1978-02-21

Sewell, Paul T.

Textiles: fiber preparation

197 18, B41J 130

Patent

active

040747980

ABSTRACT:
A method and apparatus for providing variable print hammer energy information and variable character spacing information for every character of every font in an electronic typing system having interchangeable print wheels, wherein the individual print wheels carry self-descriptive information in coded form on a read-only memory. The descriptive information is encoded on a portion of the print wheel and contains, in high density, machine readable, permanent form, sufficient coded data to instruct the electronic typing system as to the optimal use of the particular font of characters contained on the type wheel. In a preferred embodiment, a single initializing revolution of the print wheel upon each insertion or machine start-up cycle serves to load the encoded data into a read/write memory for subsequent call-up and use by the electronic typing system during the print-out of each character. The data is serially encoded on the print wheel for reading by single track optional sensing apparatus. Alternate embodiments using parallel data tracks and magnetic sensing apparatus are discussed.

REFERENCES:
patent: 3858509 (1975-01-01), Grundherr
patent: 3905463 (1975-09-01), Boyce et al.
patent: 3949853 (1976-04-01), Lahr et al.
patent: 3954163 (1976-05-01), Gabor
An Arrangement for Encoding the Impact Energy for Associated Characters in a Serial Printer, Gordon Sohl, Xerox Disclosure Journal, vol. 1, Nos. 9/10, Sept./Oct. 1976, p. 25.
Character Wheel for Low-Cost Changeable Font Printer, IBM Technical Discl. Bulletin, C. A. Branson, et al., vol. 16, No. 5, Oct. 1973, p. 1515.

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