US4157474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray film cassette
Assignee: Hipoint Research Inc
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Filing: 1977-08-01
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Granted: 1979-06-05
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Expires: 1997-08-01
Abstract
Abstract An improved x-ray film cassette including a film support plate and a resilient concave-convex window member formed of a highly x-ray transparent material. The convex side of the window member is positioned facing the film supporting plate so that when the cassette is loaded with film, the window member is deformed into a substantially flat shape and the film is clamped over its entire surface area between the window member and the support plate.
Inventors
- 👤 Paul G. Koontz
- 👤 Arthur M. Cantu
- 👤 Richard L. Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:47
CPC Classifications
G; G03; G03B; G03B42/00; G03B42/02; G03B42/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
181 words
An improved x-ray film cassette which comprises; a frame having sides and an open top and bottom; a resilient concave-convex window member attached to and closing the open top of said frame, the convex side of said member facing the bottom of said frame, said window member being a composite material comprised of powdered carbon and a fibrous material selected from the group consisting of synthetic organic fibers, carbon filaments and both synthetic organic fibers and carbon filaments held in a matrix of cured plastic material; a film support plate closing the bottom of said frame and hingedly attached thereto so that said support plate can be selectively opened and closed, said support plate being spaced from said window member whereby when said support plate is in the closed position with x-ray film supported thereon, said window member is deformed into a substantially flat shape and said x-ray film is clamped under pressure over its entire surface area between said window member and said support plate; and means for locking said support plate in the closed position attached to said frame.
Claim 2
Dependent Claim
181 words
An improved x-ray film cassette which comprises; a frame having sides and an open top and bottom; a resilient concave-convex window member attached to and closing the open top of said frame, the convex side of said member facing the bottom of said frame, said window member being a composite material comprised of powdered carbon and a fibrous material selected from the group consisting of synthetic organic fibers, carbon filaments and both synthetic organic fibers and carbon filaments held in a matrix of cured plastic material; a film support plate closing the bottom of said frame and hingedly attached thereto so that said support plate can be selectively opened and closed, said support plate being spaced from said window member whereby when said support plate is in the closed position with x-ray film supported thereon, said window member is deformed into a substantially flat shape and said x-ray film is clamped under pressure over its entire surface area between said window member and said support plate; and means for locking said support plate in the closed position attached to said frame.
Claim 3
Dependent Claim
20 words
The apparatus of claim 1 wherein said fibrous material is carbon filaments and said plastic material is a thermosetting resin.
Claim 4
Dependent Claim
24 words
The apparatus of claim 2 wherein said carbon filaments have an average diameter of 0.0007 inch and said thermosetting resin is a phenolic resin.
Claim 5
Dependent Claim
12 words
The apparatus of claim 3 wherein said phenolic resin is bisphenol A-novalak.
Claim 6
Dependent Claim
114 words
An improved x-ray film cassette which comprises: a rectangular frame having sides and an open top and bottom; a highly x-ray transparent window member formed of a composite material comprised of powdered carbon and a fibrous material selected from the group consisting of synthetic organic fibers, carbon filaments and both synthetic organic fibers and carbon filaments held in a matrix of cured plastic material attached to and closing the open top of said frame; a film support plate closing the bottom of said frame and hingedly attached thereto so that said support plate can be selectively opened or closed; and means for locking said support plate in the closed position attached to said frame.
Claim 7
Dependent Claim
114 words
An improved x-ray film cassette which comprises: a rectangular frame having sides and an open top and bottom; a highly x-ray transparent window member formed of a composite material comprised of powdered carbon and a fibrous material selected from the group consisting of synthetic organic fibers, carbon filaments and both synthetic organic fibers and carbon filaments held in a matrix of cured plastic material attached to and closing the open top of said frame; a film support plate closing the bottom of said frame and hingedly attached thereto so that said support plate can be selectively opened or closed; and means for locking said support plate in the closed position attached to said frame.
Claim 8
Dependent Claim
39 words
The apparatus of claim 5 which is further characterized to include a uniform layer of felt and an x-ray activated luminescent screen attached to each of the inwardly facing surfaces of said window member and said film support plate.
Claim 9
Dependent Claim
23 words
The apparatus of claim 6 wherein said window member in concave-convex in shape with the convex side thereof facing said film support member.
Claim 10
Dependent Claim
20 words
The apparatus of claim 7 wherein said fibrous material is carbon filaments and said plastic material is a thermosetting resin.
Claim 11
Dependent Claim
24 words
The apparatus of claim 8 wherein said carbon filaments have an average diameter of 0.0007 inch and said thermosetting resin is a phenolic resin.
Claim 12
Dependent Claim
12 words
The apparatus of claim 9 wherein said phenolic resin is bisphenol A-novalak.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-04 | 1982-12-04 | 1983-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-04 | 1986-12-04 | 1987-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-04 | 1990-12-04 | 1991-06-05 | $7700.00 | Window Closed / Lapsed |