Microprocessor controlled card reader/printer
US4058056A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1976 |
| Grant date | Nov 15, 1977 |
| Priority date | — |
| Expiry date | Jun 21, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K17/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In this full duplex card reader/printer, a transport mechanism carries a card first past a read head at a constant rate and then incrementally past a printer. Under microprocessor control a message is printed on the card which is responsive to data read from the same card. A first transducer associated with the drive transport mechanism provides "read sprocket" pulses that are utilized by the microprocessor to ascertain the presence under the read head of a card data column. Stepping of the card past the printer is enabled by the microprocessor when a responsive message is ready for printing. As the card is stepped to each new print position, a "move sprocket" pulse is transmitted to the microprocessor. The microprocessor then compares the next message character with the character available for printing, as indicated by a set of pulses supplied from the printer. When these are the same, the microprocessor generates a command to print the character.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.