Method and apparatus for positive positioning of slides

Details Method and apparatus for positive positioning of slides Method and apparatus for positive positioning of slides

1992-06-22

1993-11-30

Foster, Jimmy G.

Special receptacle or package

For plate or sheet

Fragile or sensitive

353120, G03B 2304

Patent

active

052657264

ABSTRACT:
A method and apparatus for positioning slides in a slide tray for either front or rear projection, so that all slides align top to bottom and side to side in a slide tray. Whether viewing either by front or rear projection, a slide is loaded with the image upside down into a slide tray. Through the use of rectangular guides mounted on opposite sides down the length of a reversible slide tray top, which guides, when viewed in cross-section, are symmetric to the vertical centerline of the slide at the approximate meeting of the slide and the top in the slide tray, whereby if the top is reversed the guides maintain their left and right relationship to said centerline but reverse their up and down relationship, all slides bearing a rectangular cutout in the top edge of each slide frame, which cutout is just able to receive either guide, are properly oriented in the slide tray for front or rear projection only if the top seats.

REFERENCES:
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patent: 3504967 (1970-04-01), Hipp, Jr.
patent: 3721494 (1973-03-01), Stine
patent: 4105319 (1978-08-01), Wells et al.
patent: 4605127 (1986-08-01), Magnussen, Jr.
patent: 4674000 (1987-06-01), Lee
patent: 4858003 (1989-08-01), Wirt et al.
patent: 4863025 (1989-09-01), Wolf

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