US3930165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cassette
Assignee: Bar-Ray Products Inc
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Filing: 1974-10-21
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Granted: 1975-12-30
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Expires: 1994-10-21
Abstract
Abstract A film cassette for daylight handling of X-ray film. The cassette includes a flat, thin profiled housing with an opening along one edge through which film sheets may be inserted and removed. Internally of the housing are opposed intensifying screens, one of which is movable away from the other to permit insertion and removal of the X-ray film sheets. A plate member having a lifting mechanism cooperates with the movable intensifying screen to urge it against the other intensifying screen when a film sheet is in place in the cassette and is operable to separate the intensifying screen to permit removal of the X-ray film sheet after exposure and insertion of a new sheet.
Inventors
- 👤 Alfred Robinson
- 👤 Joseph S Schatz
- 👤 Leonhard Katz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:53
CPC Classifications
G; G03; G03B; G03B42/00; G03B42/02; G03B42/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
337 words
In a film cassette having a front and back wall and edge walls connecting three edges of the front and back walls together leaving an opening at one edge wall, first intensifying screen means disposed adjacent the inner surface of said back wall, second intensifying screen means disposed in opposed facing relation to said first screen means, and means for mounting said second screen means for movement toward and away from said first screen means, the improvement comprising: a. plate means disposed between the second screen means and the front wall; b. means for mounting said plate means in said housing at a fixed distance from said first screen means and for sliding movement toward and away from one edge wall of the housing between first and second positions; c. a plurality of first fingers fixed to the surface of said plate means facing the second screen means with each finger having a lifting surface facing away from said second screen means; d. a plurality of second fingers fixed to the surface of said second screen means facing said plate means for cooperating with the first fingers, said second fingers each having a second lifting surface facing away from said plate means for slidably engaging said first lifting surfaces; e. at least one of the first and second lifting surfaces being inclined in a plane extending obliquely to said plate and second screen means and extending in the direction of sliding movement of said plate means; f. said first lifting surfaces being disposed relative to said second lifting surfaces to permit movement of said second screen means toward said first screen means when said plate is in said first position; g. said first lifting surfaces engaging said second lifting surfaces to move said second screen means away from the first screen means as said plate is slid from said first position to said second position; and h. means for pressing said second screen means toward said first screen means when said plate is in said first position.
Claim 2
Dependent Claim
337 words
In a film cassette having a front and back wall and edge walls connecting three edges of the front and back walls together leaving an opening at one edge wall, first intensifying screen means disposed adjacent the inner surface of said back wall, second intensifying screen means disposed in opposed facing relation to said first screen means, and means for mounting said second screen means for movement toward and away from said first screen means, the improvement comprising: a. plate means disposed between the second screen means and the front wall; b. means for mounting said plate means in said housing at a fixed distance from said first screen means and for sliding movement toward and away from one edge wall of the housing between first and second positions; c. a plurality of first fingers fixed to the surface of said plate means facing the second screen means with each finger having a lifting surface facing away from said second screen means; d. a plurality of second fingers fixed to the surface of said second screen means facing said plate means for cooperating with the first fingers, said second fingers each having a second lifting surface facing away from said plate means for slidably engaging said first lifting surfaces; e. at least one of the first and second lifting surfaces being inclined in a plane extending obliquely to said plate and second screen means and extending in the direction of sliding movement of said plate means; f. said first lifting surfaces being disposed relative to said second lifting surfaces to permit movement of said second screen means toward said first screen means when said plate is in said first position; g. said first lifting surfaces engaging said second lifting surfaces to move said second screen means away from the first screen means as said plate is slid from said first position to said second position; and h. means for pressing said second screen means toward said first screen means when said plate is in said first position.
Claim 3
Dependent Claim
116 words
The improvement in a film cassette according to claim 1 wherein: a. said last mentioned means includes spring means fixed to the opposing surface of one of said plate and second screen means; and b. the opposing surface of the other of said plate and second screen means includes raised seating surfaces cooperating with said spring means, said spring means and seating surfaces opposing each other when said plate is in said first position to create a force urging said second screen means toward said first screen means and being out of opposing relation when said plate is in said second position to remove the force urging said second screen means toward said frist screen means.
Claim 4
Dependent Claim
76 words
The improvement in a film cassette according to claim 2 wherein: a. said spring means comprises a plurality of separate springs each having a curved compressible surface facing the cooperating seating surfaces; and b. each of said seating surfaces includes an inclined portion extending in the direction of sliding movement of said plate means and along which said springs slide as said plate is moved from said first to said second positions to compress the springs.
Claim 5
Dependent Claim
27 words
The improvement in a film cassette according to claim 3 wherein: a. the seating surfaces for the spring means are located at positions spaced from the fingers.
Claim 6
Dependent Claim
41 words
The improvement in a film cassette according to claim 4 wherein: a. the springs are fixed to the plate means at positions spaced from the finger on said plate means for cooperation with seating surfaces disposed on the second screen means.
Claim 7
Dependent Claim
41 words
The improvement in a film cassette according to claim 3 wherein: a. the seating surfaces for the spring means are defined by the surfaces of the fingers on one of said plate and second screen means which face the cooperative fingers.
Claim 8
Dependent Claim
52 words
The improvement in a film cassette according to claim 3 wherein: a. all Of said lifting surfaces are inclined in planes extending obliquely to the plate and second screen means; and b. said lifting surfaces oppose each other, at least to some extent, when the plate means is in said first position.
Claim 9
Dependent Claim
45 words
The improvement in a film cassette according to claim 3 further including: a. second spring means for urging the plate means toward the first position; and b. actuator means accessible from the exterior of the cassette for moving the plate means toward the second position.
Claim 10
Dependent Claim
126 words
The improvement in a film cassette according to claim 8 wherein: a. the second fingers fixed to the second screen means include side fingers extending laterally beyond the side edges of the second screen means in a direction generally perpendicular to the direction of sliding movement of the plate means, said side fingers having lifting surfaces facing away from said plate means; b. said actuating means is disposed between the side fingers and the back wall of the cassette; and c. said actuating means includes third lifting surfaces facing in the same direction as the lifting surfaces of the first lifting fingers on the plate means for engaging the lifting surfaces of the side fingers in the same manner as said first and second lifting surfaces.
Claim 11
Dependent Claim
106 words
The improvement in a film cassette according to claim 8 wherein: a. said plate means includes side wing means extending laterally beyond the side edges of the plate means in a direction generally perpendicular to the direction of sliding movement of the plate means; b. said second spring means is disposed adjacent the side edges of the plate means for engaging said side wing means to urge the plate means toward said first position; and c. said actuating means is disposed adjacent the side edges of the plate means for engaging the side wing means along a surface thereof facing the edge wall having the opening
Claim 12
Dependent Claim
40 words
The improvement in a film cassette according to claim 8 wherein: a. said plate means is mounted for sliding movement between a first position proximate the edge wall having the opening and a second position removed from said edge wall.
Claim 13
Dependent Claim
40 words
The improvement in a film cassette according to claim 10 further comprising: a. light seal means fixed to the plate means adjacent the edge wall having the opening for closing the opening when said plate is in the first position.
Claim 14
Dependent Claim
105 words
The improvement in a film cassette according to claim 12 wherein: a. the light seal means is a flexible strip of material secured across the edge of the plate means adjacent the edge wall having the opening and normally extends beyond the plate means in spaced relation to the bottom wall of the casing; and b. the edge wall of the cassette having nthe opening includes an inclined portion overlying said opening and in the path of sliding movement of the plate means and the light seal thereon for deflecting the light seal downwardly across said opening as the plate moves to said first position.
References Cited (Backward Citations)
US3870889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |