US 4,431,282 AGranted

Device for mounting diapositives in a strip and an apparatus for projecting the strip-mounted diapositives

OwnerLiesel Martin geb. Boserinventor

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Abstract

Diapositives are mounted in a strip formed by a pair of flexible sheet members each having at least two picture openings therein in side-by-side relationship and the sheet members are fastened to each other in face-to-face relationship mutually offset by a single picture opening. The frame is interposed between the sheet members and a diapositive is moveably positioned within an opening in the frame. The thickness of the frame is greater than that of the diapositive so that a diapositive is freely moveable within a frame opening and has play between the sheet members. An apparatus for projecting the strip mounted diapositives is provided with a pair of cassettes one of which contains a strip in which the diapositives are mounted and the second cassette contains a strip without any diapositives. The ends of the strips are automatically connected to each other for successively introducing the diapositives into the apparatus.

Claims13

Dependent claims

In an apparatus for the projection of diapositives mounted in a strip which successively introduces the diapositives into the apparatus for projection, a first cassette adapted to contain a first strip having a plurality of diapositives successively mounted therein, a second cassette adapted to contain a second strip in which no diapositives are mounted, means on the ends of said first and second strips for self-connecting an end of one strip to the adjacent end of the other strip such that said ends are securely fastened together during the time said first strip with its diapositives is moved from said first cassette through the apparatus for successive projection of the diapositives mounted therein, said self-connecting means comprises spring wire hooks on said adjacent ends of said strips, an inclined guide surface within an opening in at least one of said cassettes through which said strip passes into and out of said cassette, said guide surface acting against one of said hooks when said strip ends pass through said opening to engage said hooks to interconnect the adjacent ends of said strips.

Dependencies are inferred from the claim text.