Transparent image marking sheet for projection systems

Details Transparent image marking sheet for projection systems Transparent image marking sheet for projection systems

1980-04-01

1981-10-20

Hoffman, James R.

Coating processes

Optical element produced

Transparent base

428195, 428199, 428510, 428411, B05D 310, B05D 506, G02B 110

Patent

active

042961505

ABSTRACT:
A transparent image sheet carrier for overhead-projection systems is described based upon a dark-tone colored field with image markings in bright-tone contrasting colors, including a sheet bearing a layer containing at least one acid-resistant dye for imparting the dark-tone color to the field; the dye may be discharged in the locale of the image markings by a discharge device with a simultaneous appearance in the image locale of the bright-tone contrasting color.

REFERENCES:
patent: 3653938 (1972-04-01), Obuchi et al.

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