Weighted modulus numbering apparatus

Details Weighted modulus numbering apparatus Weighted modulus numbering apparatus

1980-03-20

1982-05-11

Coven, Edward M.

Printing

Selective or progressive

Numbering

371 54, 101 79, 235 92EC, B41L 4500

Patent

active

043287468

ABSTRACT:
Weighted modulus numbering apparatus is capable of printing composite numbers consisting of serial identification numbers and accompanying check digits which are determined in accordance with a system where the check digits for certain identification numbers may be invalid, as by requiring a two-digit number rather than an allowable single-digit number. The check digits are generated in the form of digital (for example, binary) words and decoded to provide a signal representing the validity or invalidity of the check digit. A memory stores the check digit words and a bit representing the validity/invalidity of the check digit. The decoding of an invalid check digit operates to cause the word representing the check digit for the next successive identification number to be stored with the valid/invalid bit in memory. The numbering machine, which presents the successive identification numbers for printing, is caused to increment twice in response to a signal representing an invalid check digit. Since the check digit word stored with the signal representing the invalid check digit represents the check digit for the next successive identification number, a check digit numbering wheel is positioned in response to that check digit word and will print the proper check digit for the next successive identification number and also a valid check digit.

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patent: 3833795 (1974-09-01), Shoshani et al.
patent: 4085670 (1978-04-01), Poole
patent: 4202265 (1980-05-01), Eglowstein et al.
patent: 4236446 (1980-12-01), Lovrich et al.
Lavin et al., IBM Tech. Discl. Bulletin, vol. 10, No. 12, May, 1968, pp. 1872-1873.

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