Image projection apparatus

Details Image projection apparatus Image projection apparatus

1987-11-18

1989-05-16

Cuchlinski, Jr., William A.

Optics: image projectors

Selective data retrieval

353 27A, G03B 2308

Patent

active

048304840

ABSTRACT:
An image projection apparatus detects whether or not a film sheet such as a microfiche is clamped between a pair of transparent members upon energization of the apparatus, performs index frame projection when the film sheet is clamped therebetween, and performs ejection when the film sheet is not clamped therebetween, thereby preventing damage to the film sheet and the jam state.

REFERENCES:
patent: 3722991 (1973-03-01), Edhlund
patent: 3743399 (1973-07-01), Smith
patent: 4072860 (1978-02-01), Koleff et al.
patent: 4549797 (1985-10-01), Sawano et al.
patent: 4578787 (1986-03-01), Shimizu et al.

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