Micr imprinting photo-etched credit card
Abstract
Abstract A personal credit card for use in a hand operated imprinter for placing MICR and OCR encoding on business documents through a suitable carbon comprises a balanced laminated structure of a PVC core having a light insensitive nylon film adhesively bonded on each side. A film of a photo-polymerizable nylon is autogeneously bonded to one of the light insensitive films. The reverse side of the photo-polymerizable film is lightly exposed prior to the autogeneous bonding. The obverse photosensitive side of the film is exposed through a negative containing the requisite visually readable and machine-readable types of characters, and the unexposed background areas are then removed by solvent washing to leave the characters in relief. The prior exposure of the reverse side of the photosensitive film permits ''''over etching,'''' i.e., allows more tolerance in the etching step and assures that 100 percent contact between the two nylon films remains at the autogeneous bond minimizing penetration of the solvent to the sub film and assuring good support of the relief characters.
Inventors
- 👤 John Ramsey Bradford
Bibliographic Details
Claims Analysis
Total Claims: 1References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |