Agfa-gevaert Ag

Reimund Kluge

Walter Bauer

Manfred Schmidt

Heinrich Farber

Eberhard Werner

Gunter Muller

A cassette for x-ray film has a cover and a bottom. A magnetic sheet is secured to the cover and a fluorescent screen is, in turn, secured to the magnetic sheet. A ferromagnetic foil is mounted on the bottom of the cassette and carries a second fluorescent screen. When a sheet of film is inserted in the cassette and the cassette is closed, the film is flanked by the fluorescent screens, which, in turn, are flanked by the magnetic sheet and the ferromagnetic foil. The magnetic sheet and ferromagentic foil are attracted to one another and thereby urge the fluorescent screens into engagement with the film. The ferromagnetic foil is mounted on the bottom of the cassette via connecting elements which permit the ferromagnetic foil to undergo relatively large amounts of movement relative to the bottom of the cassette. In this manner, the ferromagnetic foil can conform to deformation of the cassette. Each of the connecting elements includes a flexible strip which carries an adhesive layer at both of its longitudinal edges, and the adhesive layers are offset relative to one another. One of the adhesive layers is located on that surface of the flexible strip which faces the bottom of the cassette and engages only the flexible strip and the bottom of the cassette. The other adhesive layer is situated on that surface of the flexible strip which faces the ferromagnetic foil and engages only the flexible strip and the ferromagnetic foil.

Container for photosensitive material

An arrangement for projecting data onto an X-ray film has a housing which is designed to support a film cassette. The housing has a pair of mutually perpendicular slots which are capable of receiving a data carrier card. The slots are so designed that the data-carrying part of the card is exposed when the card is supported in either of the slots. A light source for illuminating the data-carrying part of the card is positioned so as to be on the optical axis of the data-carrying part when the card is accommodated in a first one of the slots but not the second. A partially light-transmissive mirror is mounted between the latter slot and the light source and is inclined at an angle of 45.degree. to both of the slots. The mirror transmits a portion of the light from the light source to one of the slots and reflects the light returning to it from this slot towards the film inverting the image of the data in the process. The mirror further reflects a portion of the light from the light source to the other of the slots and transmits the light returning to it from this slot towards the film without inverting the image of the data. The slot selected for the card is thus determined by the required orientation of the image of the data on the film. A focusing lens is mounted between the mirror and the film. The lens is so arranged relative to the above-mentioned second slot that it is located on the optical axis of the data-carrying part of the card when the latter is inserted in such slot. The position of the light source, as well as the relative positions of the light source and the mirror, make it possible to uniformly and brightly illuminate the data-carrying part of the card in either slot using only a single light source.

Arrangement for projecting data onto film

X-ray film in a cassette or camera is magnetically gripped by a pair of magnetic units which engage opposite sides of the film. Each of the units includes a sheet of magnetic material and an intensifying screen located on that side of the associated magnetic sheet which faces the other unit. The units have cooperating first portions which engage a first region of the film and cooperating second portions which engage a second region of the film. The units are designed in such a manner that the magnetic force of the second portions exceeds that of the first portions so that the second region of the film is gripped more strongly than its first region. Furthermore, the units are arranged such that the second portions thereof engage the film no later than the first portions thereof. In this manner, entrapment of air bubbles on the surface of the film is prevented and image quality is improved.

Method and arrangement for gripping X-ray film

The housing of a cassette for motion picture film or magnetic tape consists of two or more sections which are separably coupled to each other by detents each having a preferably elastic toothed hook which is provided on one of the sections and whose tooth or teeth can snap behind one or more shoulders in one or more sockets provided in the other section or sections. The hooks do not project beyond the general outline of the housing when their teeth engage the respective shoulders. The housing may consist of an inner casing which is received in an outer casing having two shells which are separably coupled to each other and/or to the inner casing, or of an inner casing and a one-piece outer casing which receives the inner casing and is separably coupled to the rear end wall of the inner casing.

Growing community of inventors

Unterhaching, Germany

Reimund Kluge