Optics: image projectors – Picture carrier
Patent
1993-01-06
1994-06-07
Cuchlinski, Jr., William A.
Optics: image projectors
Picture carrier
353DIG3, G03B 2130
Patent
active
053194004
ABSTRACT:
A sheet of imageable film for use in an overhead projector is provided with at least one, and preferably two, opaque flaps attached in a foldable manner to the film so that the flaps may be unfolded to prevent unwanted light from shining past the edges of the transparency.
REFERENCES:
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patent: 4467541 (1984-08-01), Pettersson
patent: 4480003 (1984-10-01), Edwards et al.
patent: 4869955 (1989-09-01), Ashcraft et al.
patent: 4956225 (1990-09-01), Malbotra
patent: 5044100 (1991-09-01), Roberts et al.
patent: 5104731 (1992-04-01), Gager
Evans Dwight L.
Herbert Alan J.
Russell Terrance J.
Anderson David W.
Cuchlinski Jr. William A.
Dowling William C.
Griswold Gary L.
Kirn Walter N.
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