Light absorption printing process

Details Light absorption printing process Light absorption printing process

1975-12-24

1977-02-08

Hartary, Joseph W.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

235 6112N, 250458, 427157, G01D 1534

Patent

active

040074625

ABSTRACT:
A method and system for recording information on a document surface to accommodate the automatic processing of documents is provided, which requires neither ink jet nor impact printing. A photosensitive material, such as a dye, is applied as a continuous coat over a field of the document surface. Selected locations within the field thereafter are irradiated with a light beam. The light beam is of an intensity and wavelength to effect a change in the light emitting properties of the photosensitive material at the selected locations. Either alphanumeric or bar encoded information may be recorded thereby on a document surface for subsequent detection by an optical reader.

REFERENCES:
patent: 3105908 (1963-10-01), Burkhardt
patent: 3266393 (1966-08-01), Chitayat
patent: 3303341 (1967-02-01), Fram et al.
patent: 3477850 (1969-11-01), Berman
patent: 3609694 (1971-09-01), Brenner
patent: 3723121 (1973-03-01), Hauser
patent: 3803637 (1974-04-01), Martin et al.

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