System for discriminating among different kinds of type carriers

Details System for discriminating among different kinds of type carriers System for discriminating among different kinds of type carriers

1978-11-27

1984-09-25

Coven, Edward M.

Printing

Selective or progressive

Bed and platen machines

101111, B41J 120

Patent

active

044730063

ABSTRACT:
Systems for discriminating among a plurality of type carriers differing in number of characters and pitch of characters are disclosed. In one circuit, the type carrier is provided with synchronizing marks and discrimination marks in addition to the usual type character marks. The synchronizing mark is located at the beginning of a set of characters, and the discrimination mark is located a predetermined distance from the synchronizing mark according to the number of characters and pitch of the particular type carrier. This distance is determined by counting type character marks. In another circuit, one or more discrimination marks are provided between type character marks at the beginning of a set of characters. The number of discrimination marks indicates the number of characters of the particular type carrier. In either circuit, a counter of only a few stages and a simple decoding circuit are all that are required to carry out the discrimination operation.

REFERENCES:
patent: 3845709 (1974-11-01), Gardiner
patent: 3880075 (1975-04-01), Bovett et al.
patent: 3899968 (1975-08-01), McDevitt
patent: 4055117 (1977-10-01), Munday
patent: 4074798 (1978-02-01), Berger
patent: 4152981 (1979-05-01), Sapino et al.

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