Optics: image projectors – Picture carrier
Patent
1997-02-18
1998-11-03
Dowling, William
Optics: image projectors
Picture carrier
353 97, G03B 2114
Patent
active
058298576
ABSTRACT:
Folder apparatus for holding and positioning a plurality of transparencies for projection by an overhead projector includes a base panel with two wing panels extending outwardly and in opposite directions from and secured to the base element. The transparencies are disposed against one wing panel and are movable from the position against the one panel to a position on the base panel for projection, and are movable from the projection position on the base panel to a storage position against the other panel. Transparencies include a base element with extensions through which extend holes or apertures. The holes or apertures receive guide rods which are secured to the base panel. The transparencies move on the guide rods. A gradual reveal frame for gradually revealing material on the transparency being projected is also disclosed.
REFERENCES:
patent: 3531193 (1970-09-01), Diehl
patent: 3709590 (1973-01-01), Bisberg
patent: 3913740 (1975-10-01), Bisberg
patent: 4137650 (1979-02-01), Hayes
patent: 4203659 (1980-05-01), Constantine et al.
patent: 4679923 (1987-07-01), Nielsen
patent: 4688911 (1987-08-01), Simbal
patent: 4787738 (1988-11-01), Joffe
patent: 5121984 (1992-06-01), Jones
patent: 5198846 (1993-03-01), Zilber
patent: 5321451 (1994-06-01), Olugboji
patent: 5469235 (1995-11-01), Zako
patent: 5475453 (1995-12-01), MacCarthy
Dowling William
Shields H. Gordon
LandOfFree
Transparency folder and holder 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 Transparency folder and holder apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transparency folder and holder apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-682755