Optics: image projectors – Selective data retrieval – Plural picture rows on single microcard
Patent
1975-08-08
1976-12-28
Stephan, Steven L.
Optics: image projectors
Selective data retrieval
Plural picture rows on single microcard
G03B 2308
Patent
active
039998479
ABSTRACT:
Carrier apparatus retains sheet-like microfilm to be positioned in an apparatus for projecting images for either viewing or copying. The carrier is moved in first and second orthogonal directions such that the microfilm can be positioned to align a specific frame at a projection station. The carrier is mounted on a support which includes a pair of spaced guide members along at least one of the directions and means mounted between the guide members in contacting relationship therewith. Each pair of guide members and the structure therebetween forms point contact support such that the carrier may be moved smoothly for accurate positioning of the microfilm for alignment of a specific frame thereon. In one embodiment the guide members each include a V-shaped groove and the structure therebetween includes a plurality of rollers mounted in point contacting relationship in the V-shaped grooves. In a modified embodiment each of the guide members consists of a roller and the structure therebetween includes a rail member having V-shaped grooves on each of the surfaces thereof facing the rollers. In a further modification of the carrier supporting apparatus, each of the guide members is a roller having a groove along its outer circumference and a rail is mounted therebetween to engage each grooved surface of each pair of guide members.
REFERENCES:
patent: 2701176 (1955-02-01), Baumgard
patent: 3744891 (1973-07-01), Dennis et al.
patent: 3790266 (1974-02-01), Ueda et al.
patent: 3834800 (1974-09-01), Brownscombe
patent: 3836242 (1974-09-01), Kluver et al.
patent: 3869201 (1975-03-01), Lysle
Kagawa Masakazu
Maeda Masahiro
Minolta Camera Kabushiki Kaisha
Stephan Steven L.
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