Screen projection apparatus

Details Screen projection apparatus Screen projection apparatus

1993-09-20

1994-10-04

Wintercorn, Richard A.

Optical: systems and elements

Projection screen

Roll up screen

160120, 160310, 359443, 359449, G03B 2156, A47H 100, E06B 908

Patent

active

053531523

ABSTRACT:
A screen projection apparatus includes a housing within which a pair of projection screens are stored in a rolled position on motor driven rollers. A pair of access doors are mounted on the housing and support an idler roller over which a screen passes. The access doors open, one at a time, and the idler roller ensures that each of the screens when unrolled hangs in a common plane thereby eliminating the need to refocus the optical projection equipment which is used with the apparatus.

REFERENCES:
patent: 4045123 (1977-08-01), Brown
patent: 4089361 (1978-05-01), Zeppmeisel
patent: 4159162 (1979-06-01), Christoffel
patent: 4369829 (1983-01-01), Casiday
patent: 4679406 (1987-07-01), Weiblen
patent: 4951730 (1990-08-01), Hsu
patent: 5140461 (1992-08-01), Blood et al.

Affiliated with

Also associated with

Rating

Screen projection apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Screen projection apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Screen projection apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-585677