Method and apparatus for typing characters and optically readabl

Details Method and apparatus for typing characters and optically readabl Method and apparatus for typing characters and optically readabl

1978-11-27

1981-01-27

Zache, Raulfe B.

Boots, shoes, and leggings

400104, G06F 100, B41J 500

Patent

active

042479070

ABSTRACT:
Composer method and apparatus are disclosed in which human readable representations of characters are typed on the first part of a page and are thereafter typed on a second part of the page in the machine readable form. Key stroke signals generated by the typewriter keyboard are stored in a memory prior to being applied to access corresponding type ball positioning signals within a table to print the characters using a conventional type ball on the first portion of the page. Thereafter, the conventional type ball is replaced by a special type ball and the key stroke signals stored in the memory are used to access corresponding ones of a different set of type ball positioning signals within a second memory to enable the special type ball to type optically readable binary coded representations of the characters on the second part of the page. Each character is represented by a string of seven bits plus a parity bit which are typed using either a single strike of a group of eight bits on the special type ball or two different strikes using two different groups of four bits on the special type ball.

REFERENCES:
patent: 2958568 (1960-11-01), Hagelbarger
patent: 3541960 (1970-11-01), Dilsner et al.
patent: 3620344 (1971-11-01), Clancy et al.
patent: 3657522 (1972-04-01), Wildhaber
patent: 3719262 (1973-03-01), Taplin

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