Weighted modulus numbering apparatus
US4328746A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1980 |
| Grant date | May 11, 1982 |
| Priority date | — |
| Expiry date | Mar 20, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41K3/105
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.