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Publication numberUS3291984 A
Publication typeGrant
Publication dateDec 13, 1966
Filing dateMay 27, 1964
Priority dateMay 27, 1963
Publication numberUS 3291984 A, US 3291984A, US-A-3291984, US3291984 A, US3291984A
InventorsWasser Eric Sigvard
Original AssigneeWasser Eric Sigvard
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Flexible hermetically sealed X-ray film pack with elastic material in compression therein
US 3291984 A
Abstract  available in
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Description  (OCR text may contain errors)

3,291,984 FLEXEBLE HERMETICALLY SEALED X-RAY FILM PACK WITH ELASTIC MATERIAL IN COMPRES- SION THEREIN Eric Sigvard Wasser, Kungsholmsstrand 185, Stockholm, Sweden N Drawing. Filed May 27, 1964, Ser. No. 370,700 Claims priority, applicationggveden, May 27, 1963, 9 9 1 Claim. (Cl. 25068) The invention relates to an X-ray film pack comprising a covering which is closed in air-tight manner at its edge and encloses an X-ray film as well as intensifier foils bearing against said film under pressure.

With X-ray exposures for medical and technical purposes, there are usually employed intensifier foils which bear on the two emulsion sides of the light-sensitive X-ray film. When the X-ray radiation strikes on these intensifier foils, they fiuoresce and produce visible light, which acts on the X-ray film. In order in such cases to obtain sharp images, it is necessary that the contact between the intensifier foils and the emulsions of the X-ray film is sufiiciently good.

One known process for achieving such a good contact consists in that the intensifier foils, with the X-ray film disposed therebetween, are arranged in a rubber cassette and that thereafter the air is removed from the cassette. In this way, there is obtained a uniformly distributed pressure over the entire cassette and the foils are pressed against the film. This method presupposes, however, that the cassette has a valve and a suitable closure device; in addition, a suction pump is required for the evacuation.

A more simple method of obtaining a satisfactory vacuum in an X-ray film pack of the type initially referred to consists according to the invention in arranging, between the covering and an intensifier foil, a layer of United States Patent 0 "ice an elastically compressible material which is enclosed in the compressed condition in the pack. In the production of the pack, the insert consisting of film, intensifier foils and the layer of elastically compressible material are placed in a rubber sheath or in a sheath of soft plastic, thereafter a pressure is exerted on the sheath from outside, which compresses the layer of elastically compressible material and then, while maintaining the pressure on the sheath, the latter is sealed, either by adhesives or by another mechanical method, or if it is a plastic sheath, it is heat bonded. The result hereby achieved is that after the air-tight closure of the sheath and after removing the external pressure acting on the sheath, the external air pressure and the intrinsic elasticity of the compressible material force the intensifier foil satisfactorily against the X-ray film. It is not necessary in this case to use a pump for the evacuation of the covering.

The elastically compressible material expediently consists of foam rubber or foam plastic.

What I claim is:

An X-ray film pack comprising a hermetically sealed envelope of soft and flexible material of the class consisting of rubber and plastic, and within the envelope an X-ray film, intensifier foils on either side of the X-ray film, and an elastically compressible solid material in compression between the envelope and a said foil.

References Cited by the Examiner UNITED STATES PATENTS Q RALPH G. NILSON, Primary Examiner.

W. F. LINDQUIST, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2852692 *Sep 27, 1954Sep 16, 1958Siemens Reiniger Werke AgPlate holder for chi-ray films
US2925766 *Sep 6, 1956Feb 23, 1960Ceaverken AbLocking devices for photographic cassettes, particularly cassettes for xray photographs
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3348042 *Feb 10, 1965Oct 17, 1967Picker X Ray Mfg LtdFlexible, light-impervious, fluid-tight chi-ray film pack
US3392281 *Oct 13, 1964Jul 9, 1968Eastman Kodak CoMethod and apparatus for conditioning an chi-ray film pack for exposure by evacuatingaid film pack
US3419719 *Jul 19, 1965Dec 31, 1968Eastman Kodak CoX-ray film pack containing absorbable gas and means for absorbing said gas
US3986035 *Dec 24, 1974Oct 12, 1976Andreas SchmitzerVacuum film holder for X-ray films and intensifying foils
US5973768 *Jul 3, 1996Oct 26, 1999Imation Corp.Light-tight bag having a trapped air exit
U.S. Classification378/184, 206/455, 378/187
International ClassificationG03B17/34, G03B42/04
Cooperative ClassificationG03B42/04, G03B17/34
European ClassificationG03B17/34, G03B42/04