Abstract: A microfiche film pack having a pair of opaque covers, one of which is formed with an offset portion providing a pocket. A sheet of photosensitive material is partially positioned in said pocket, and has a tab which extends from the pocket, there being a light trap in the form of elongated indentations in said covers on opposite sides of said photosensitive sheet. The tab near the indentations is formed with several apertures through which the covers are bonded to each other to cooperate with the indentations in providing the light trap.The covers are provided with an end portion to be held in fixed position relative to the tab on the photosensitive sheet to enable the latter to be pulled from the pocket in the covers.

Abstract: A multi-compartment envelope which is resistant to tearing includes a first sheet folded along a medial line to define a front and back panel and a second sheet whose margins are adhesively secured to the interior surface of the front panel. A slot in the front panel permits access to the pocket formed by said front panel and the second sheet adhered thereto while a second pocket is formed in the envelope by adhesively securing lateral flaps on the back panel to the front surface of the front panel thereby providing a reinforced construction.

Abstract: A cassette for holding x-ray film and the like is disclosed. A cam hinge urges a cassette lid and a tray into a closed film holding position from which visible light is excluded. The lid and tray are pulled toward one another by magnetic attractors located around the lid and tray edges. A low-stress latch secures the lid and tray in their closed position. A light lock within the tray insures the exclusion of visible light from the cassette interior.

Abstract: Hermetically sealed package for photographic sheet materials provided with one or two tearstrips which extend at the end of the package in the form of a loop. In order to facilitate the opening of the package in the dark a small part of the package is scored in the corners where the tearstrip extends, so that it can easily be torn off whereupon a sufficiently long extremity of the tearstrip is freed to open the package without difficulty.

Abstract: A round tray for photographic transparencies has a bottom wall, a ring-shaped inner wall and radially extending partitions which are rigid with the two walls and define an annulus of compartments for transparencies. At least a portion of each partition resembles a wedge or sector whose width increases radially outwardly so that the parts of compartments between such portions have a constant width to thus prevent excessive changes in orientation of inserted transparencies. The transparencies may be yieldably held in the respective compartments by discrete leaf springs which are secured to a cover overlying the bottom wall and separably attached to the inner wall, or by bifurcated elastic parts of the partitions.

Abstract: A flexible compartmented package having a primary chamber serving as a mixing or reaction chamber, and one or more secondary chambers capable of being filled with a liquid, paste or similar substance to be mixed or reacted with a substance contained in the primary chamber. To enable any of the secondary chambers to be joined with the primary chamber in communication therewith, each of the secondary chambers is separated from the primary chamber by a sealing seam having a portion capable of being ruptured to destroy the seal by means of applying pressure to the secondary chamber which is intended to be joined with the primary chamber.

Abstract: Apparatus and a method for handling and reading any one of a number of film strips, each having a number of segments with each segment containing a plurality of information-containing, high-reduction image frames. The film strips are housed in a cassette which is movable with respect to a fixed reference to align a desired film strip with a reading station disposed across the optical path of an optical system. A film strip is moved out of the cassette by a force applied to one of its side edges. Control information carried by each film strip is sensed as the film strip moves out of the cassette and the sensed information is used to control the distance through which the film strip moves so that a particular segment thereof will stop at the reading station. The optical system is moved relative to the reading system so that the optical path of the optical system is selectively alignable with a particular image frame of the film strip removed from the cassette.

Abstract: An opaque vinyl envelope having facing polished inner surfaces and an open edge into which an intensifier screen and X-ray film are inserted. The other three edges are completely sealed except for a valve at one edge. Reinforcing strips are attached along the open edge. The three sealed edges of the envelope are heat sealed without pressure to eliminate an internal bead and minimize leakage along the bead when the open edge is closed and the envelope evacuated. An insert that has a relatively rough surface or is pourous assures full evacuation.

Abstract: A shipping, storage tray for protecting the surface integrity of a sensitive brittle plate, such as glass, placed therein. The sensitive plate is cushioned along its lower peripheral edge on ridge and groove shaped side walls of a ductile, conformable support tray which prevent surface contact of the plate and the tray bottom. The edges of the tray are folded back and beneath the tray exterior to prevent flakes from the raw sheared edges from being deposited inside the tray and on the plate surface. A chemical coating to enhance wetability of subsequent photo-sensitive coatings on the plate surface is deposited in the tray bottom.

Abstract: Successive carrier-length sections in which paper articles have been inserted, such as photoprints and negatives, are torn from the multi-leaf carrier stock along transverse score lines at successive interval locations along the stock. Initially bound together along only one longitudinal edge while incorporated in the body of the stock, two leaves of each carrier-length section become bonded together also at one end thereof when a carrier-length section is severed from the main stock by tearing it off along the transverse score lines, and in the act of tearing, withdrawing a portion of an intervening third lead from between the two other leaves so as to permit interengagement of contact adhesive patches pre-applied thereto.

Abstract: The present invention relates to a package comprising a stack of flexible light-sensitive sheet material. Four corner pieces of a strong material embrace the short side edges of the stack, the pack is placed in a rigid box, and spring means are provided in the closed box for urging each corner piece towards the diagonally opposite corner piece on the stack of sheet material.

Abstract: A belt-forming package, intended for use in packaging radiographic dental films is presented. The package is characterized in that the film materials are separately packed in such a way that taking one film packet out of the belt is facilitated by the provision of zones of less mechanical strength at the circumference of each separate packet. Opening of the separate packets puts no problems as a lip-like portion having an asymmetric wave-type form is overlappingly sealed to another portion so that the rupturing of the seal between both portions, causing the opening of the concerning separate packet is facilitated.