Abstract: An arrangement for supplying unexposed X-ray films to a handling apparatus, such as a cassette unloading and loading apparatus, includes a channel member bounding a channel into which a receptacle unit including an inner receptacle member and an outer tubular casing member can be introduced. The casing member is shiftable relative to the receptacle member so as to respectively cover and uncover a withdrawing opening of the receptacle member in its closed and open relative position. At least one arresting device is provided which arrests the members in their closed position. The arresting device is released by a releasing device mounted on the channel member when the receptacle unit reaches its releasing position in the channel. Then, the casing member is retained in the releasing position, and the receptacle member continues its movement until it reaches its open position.

Abstract: A circumferentially complete seal is received in a circumferentially complete groove machined into a surface of a first member forming part of an ionography imaging chamber. The surface of the first member is separated from a surface of a second member of the imaging chamber by a clearance which occasionally connects the interelectrode gap of the imaging chamber with the atmosphere. The seal has an inflatable elastic inner section adjacent to the bottom of the groove and a reciprocable second section which resembles a plunger and is moved from the groove, across the clearance and into sealing engagement with the surface of the second member in response to inflation of the first section. The latter contains a strip-shaped connector which is bolted to the first member to deform a portion of the first section into sealing engagement with the surface at the bottom of the groove.

Abstract: Sheet material is physically contacted only at its lateral edge portions by transport elements for transporting the sheet material along a predetermined transport path. The central portions of the sheet material are not physically contacted, to prevent damage to them. Because the sheet material is held only at its lateral edge portions, sagging or bulging of the central portion of the sheet material could occur. To prevent this, the sheet material is tensioned in direction transverse to the sheet material transport direction, during actual transport, to an extent sufficient to prevent sagging or bulging of the sheet material during such transport.

Abstract: A sealing device which can open or seal a gap between two spaces that are maintained at different pressures has two members provided with surfaces flanking the gap and a seal which is received in a recess provided in one of the surfaces and extending transversely of the gap. The seal has a first section constituting a diaphragm or a hose which is secured to the recessed member and a second section resembling a flap integral with but pivotable relative to the first section at that side of the first section which is nearer to the low-pressure space. The first section is deformable in response to admission of pressurized fluid against one of its sides whereby the other side moves the flap, or at least the free marginal portion of the flap, against the surface of the non-recessed member.

Abstract: A roller to be used in apparatus for wet treatment of photographic material comprises a hollow metallic core and two inserts with coupling shafts provided therein. A coat of chemically resistant thermoplastic material is applied around and sealingly surrounds the core to protect it from the corrosive action of media used in the wet treatment process. The outer surface of the thus coated roller is thereupon machined to a high-quality finish.

Abstract: An ionography imaging chamber for use in the cassette of an X-ray apparatus has a flat prismatic pressure vessel defining an interelectrode gap for compressed high Z gas and a dielectric charge-receiving sheet which is to be exposed to a pattern of X-rays. The pressure vessel fits into the compartment of a strongly deformation-resistant jacket having a centrally located sleeve consisting primarily of polyurethane foam, a thin tubular inner envelope which consists at least in part of convoluted fibrous material, and a thin tubular outer envelope which also consists at least in part of convoluted fibrous material. That envelope which takes up compressive stresses has a layer of carbon epoxy fibers. The other envelope takes up tensional stresses and contains Kevlar fibers. The pressure vessel has two flat tray-shaped main portions which consist of polyurethane foam.

Abstract: A roller to be used in apparatus for wet treatment of photographic material comprises a hollow metallic core and two inserts with coupling shafts provided therein. A coat of chemically resistant thermoplastic material is applied around and sealingly surrounds the core to protect it from the corrosive action of media used in the wet treatment process. The outer surface of the thus coated roller is thereupon machined to a high-quality finish.