Photocopying – Projection printing and copying cameras – Identifying – composing – or selecting
Patent
1984-02-01
1985-09-24
Mathews, A. A.
Photocopying
Projection printing and copying cameras
Identifying, composing, or selecting
355 1, 355 77, 355133, 354 77, 354107, 346110R, 40 15, 40 16, G03B 1724, G03B 2752
Patent
active
045429820
ABSTRACT:
A temporary security badge fabrication system is provided comprising a badge having at least one surface coated with an ambient light sensitive coating which when exposed to ambient light conditions for a specified predetermined period of time will change to a specified color. A means is also provided for printing information on the badge. An attachment means is provided which is mounted to the badge for attaching the badge to a wearer and permitting exposure of the badge to ambient light. Thus when the badge is attached to the wearer and exposed to ambient light for the specified period of time, the badge changes to the specified color.
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"What Fixer Does", p. 68, from the book The Print, Life Library of Photography, Time Life Books.
Mathews A. A.
Temp Badge Security Systems, Inc.
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