Patent US1895727A successfully refreshed from Google Patents.
Patent EP0276497A1 successfully refreshed from Google Patents.
EP0276497A1
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Process for the production of multiple radiographic images
Assignee: Agfa Gevaert NV
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Filing: 1987-01-27
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Granted: —
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Expires: 2007-01-27
Abstract
Abstract A process for the production of multiple radiographic images in which a corresponding number photosensitive layers is exposed in a single shot to penetrating radiation and to photons emitted by fluorescent material sensitive to such penetrating radiation, characterized in that during such exposure each said photosensitive layer is located between a layer of said fluorescent material and a visible light reflecting layer which comprises white pigment particles and has a diffuse white light reflection density of less than 0.30.
Inventors
- 👤 Romain H. Bollen
- 👤 Raymond L. Florens
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 10:40
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/16; G03C5/17
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
80 words
A process for the production of multiple radiographic images in which a corresponding number of photosensitive layers is exposed in a single shot to penetrating radiation and to photons emitted by fluorescent material sensitive to such penetrating radiation, characterized in that during such exposure each said photosensitive layer is located between a layer of said fluorescent material and a visible light reflecting layer which comprises white pigment particles and has a diffuse white light reflection density of less than 0.30.
Claim 2
Dependent Claim
80 words
A process for the production of multiple radiographic images in which a corresponding number of photosensitive layers is exposed in a single shot to penetrating radiation and to photons emitted by fluorescent material sensitive to such penetrating radiation, characterized in that during such exposure each said photosensitive layer is located between a layer of said fluorescent material and a visible light reflecting layer which comprises white pigment particles and has a diffuse white light reflection density of less than 0.30.
Claim 3
Dependent Claim
26 words
A process according to claim 1, wherein the diffuse white light reflection density of the or each said visible light reflecting layer is less than 0.10.
Claim 4
Dependent Claim
31 words
A process according to claim 1 or 2, wherein said pigment comprises particles of barium sulphate and/or titanium dioxide having an average grain size in the range 0.1 to 1 µm.
Claim 5
Dependent Claim
21 words
A process according to claim 3, wherein said particles are present in an amount between 30 and 60 g per sq.m.
Claim 6
Dependent Claim
28 words
A process according to any preceding claim, wherein said photo-sensitive material contains a substance which fluoresces in the visible part of the spectrum when struck by ultra-violet light.
Claim 7
Dependent Claim
17 words
A process according to any preceding claim, wherein said photo-ensitive layer is a silver halide emulsion layer.
Claim 8
Dependent Claim
22 words
A process according to any preceding claim, wherein such visible light reflecting layer is constituted by a support for said photo-sensitive layer.
Claim 9
Dependent Claim
31 words
A process according to claim 7, wherein a said support is coated with a said photo-sensitive layer on each of its faces and is held between front and rear fluorescent layers.
Claim 10
Dependent Claim
51 words
A process according to claim 7, wherein a said support is coated with a said photo-sensitive layer on only one of its faces, the support being folded in two to form a double thickness of support between two outwardly facing photo-sensitive layers which are held between front and rear fluorescent layers.
Claim 11
Dependent Claim
34 words
A process according to claim 7, wherein two fluorescent layers carried by opposite faces of a light-opaque support are sandwiched between two said photo-sensitive layers, each carried by a said visible light reflecting support.
Claim 12
Dependent Claim
44 words
A process according to any of claims 1 to 6, wherein each said photo-sensitive layer is carried by a light transparent support and such supports are held between front and rear fluorescent layers with a said visible light reflecting layer sandwiched between such supports.
Claim 13
Dependent Claim
17 words
A process according to any preceding claim, wherein said photo-ensitive layers are substantially identical to one another.
Claim 14
Dependent Claim
20 words
A process according to any preceding claim, wherein each said photo-ensitive layer is in contact with a said fluorescent layer.
Claim 15
Dependent Claim
23 words
A process according to claim 13, wherein at least one light-opaque layer is present between the or each pair of successive photo-sensitive layers.
Claim 16
Dependent Claim
71 words
A radiographic film pack assembly comprising a plurality of photo-layers and a plurality of layers in fluorescent material sensitive to penetrating radiation arranged so that each said photo-sensitive layer faces a said fluorescent layer, characterised in that each said photo-sensitive layer is located between a said fluorescent layer and a visible light reflecting layer which comprises white pigment particles and has a diffuse white light reflection density of less than 0.30.
Claim 17
Dependent Claim
71 words
A radiographic film pack assembly comprising a plurality of photo-layers and a plurality of layers in fluorescent material sensitive to penetrating radiation arranged so that each said photo-sensitive layer faces a said fluorescent layer, characterised in that each said photo-sensitive layer is located between a said fluorescent layer and a visible light reflecting layer which comprises white pigment particles and has a diffuse white light reflection density of less than 0.30.
Claim 18
Dependent Claim
21 words
An assembly according to claim 15, and having the feature or features specified in any one of claims 2 to 14.
References Cited (Backward Citations)
GB504283A
Cited
FR2084669A5
Cited
DE2808646A1
Cited
EP0028521A1
Cited
DE3128600A1
Cited
EP0182253A2
Cited
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