Optical projection apparatus

Details Optical projection apparatus Optical projection apparatus

1978-03-10

1980-01-01

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

355 45, 355 65, G03B 2752, G03B 2770

Patent

active

041814274

ABSTRACT:
A set of construction units or elements forming the subject of the invention permits the construction of various kinds or optical projection apparatus which are suitable for copying passages of literature and the like so as to produce in this way a collection of technical literature, for example in the form of a card index, for continuously supplementing the user's knowledge and for facilitating his scientific activities.

REFERENCES:
patent: 3728020 (1973-04-01), Abrams et al.
patent: 3894800 (1975-07-01), Rotter
patent: 4059355 (1977-11-01), Fritsch

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