Optics: image projectors – Picture carrier
Patent
1985-07-31
1987-07-14
Haroian, Harry N.
Optics: image projectors
Picture carrier
353DIG5, G03B 2154
Patent
active
046799230
ABSTRACT:
A protecting device (1) for transparencies (8) intended for overhead projection and pivotably mounted about a swivel pin (9) in the protecting device (1) is provided in the form of an unfoldable file. This file comprises a bottom cover (2) shaped as a rectangular frame with a transparent window (5) and comprising side members (6,7) secured thereto and situated at opposing rim portions. The swivel pin (9) is mounted in one side of the frame, preferably adjacent one corner of the frame, and in such a manner that it extends substantially perpendicular from said frame. The transparencies (8) are provided with a gripping register (10a, b, c) and are collated in a swivel cover (11) so as to be turned out individually, said swivel cover being pivotably mounted about the swivel pin. As a result, the protecting device can also be used as an easily operatable and detached presentation device which can be moved on the working surface of the overhead projector during the presentation, and whereby the transparencies (8) can be projected in any combination and sequence at the same time as they are always well protected in the device.
REFERENCES:
patent: 3253358 (1966-05-01), Wright
patent: 3264767 (1966-08-01), Coffman
patent: 3438703 (1969-04-01), Winnemann
patent: 3524703 (1970-08-01), Wright
patent: 3544211 (1970-12-01), Albee
patent: 3913740 (1975-10-01), Bisberg
patent: 4548487 (1985-10-01), Nielsen
IBM--Tech. Bulletin, "Visual Projection System", vol. 9, #12, 5/67.
LandOfFree
Protecting device for transparencies does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Protecting device for transparencies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Protecting device for transparencies will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1425191