US3567931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiographic film transport with film conveyor belts which function as intensifying screens
Assignee: HERMAN H EELKEMA
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Filing: 1969-10-10
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Granted: 1971-03-02
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Expires: 1989-10-10
Abstract
Abstract Two continuous flexible sheets of material opaque to light but transparent to X-rays, each having on one side thereof a coating of crystaline material which emits light upon the impinging thereon of X-rays, the continuous sheets being mounted for continuous rotation with portions of each sheet being parallel and the coated surfaces of said portions being in juxtaposition, a strip of film having emulsion on at least one side thereof positioned between the juxtaposed portions of the sheets and means for simultaneously advancing each of the sheets and the film equal distances.
Inventors
- 👤 Herman H Eelkema
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:15
CPC Classifications
G; G03; G03B; G03B42/00; G03B42/02; G03B42/021
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
24 words
Continuous intensifying screen apparatus as set forth in claim 1 wherein the housing is constructed to fit within the film slot of X-ray tables.
Claim 2
Dependent Claim
193 words
Continuous intensifying screen apparatus for use with X-ray equipment comprising: a. crystals of material which emit electromagnetic radiations upon the impinging thereon of X-rays; b. first and second continuous sheets of flexible material suBstantially opaque to the electromagnetic radiations emitted by said crystals and substantially transparent to X-rays; c. said crystals being affixed to one continuous surface of each of said sheets of material in substantially uniform coatings; d. a housing adapted to be mounted in X-ray equipment; e. means mounting said continuous sheets of material in said housing for continuous rotation with portions of said one continuous surface having said crystals affixed thereto of each of said sheets lying in parallel juxtaposition to each other and in a plane generally transverse to the X-ray beam of the equipment and intersecting said beam; f. means for mounting an elongated strip of film, having an emulsion on each side thereof sensitive to the electromagnetic radiation emitted by said crystals and X-rays, between said portions of said continuous sheets and parallel therewith; and g. means affixed to said housing for advancing the strip of film and the continuous sheets of material substantially equal amounts simultaneously.
Claim 3
Dependent Claim
28 words
Continuous intensifying screen apparatus as set forth in claim 3 wherein the means mounting the continuous sheets of material include two pairs of spaced apart generally parallel rollers.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |