US4823372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film exposure and processor system
Assignee: 3M Co
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Filing: 1987-02-12
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Granted: 1989-04-18
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Expires: 2007-02-12
Abstract
Abstract A film handling system which permits industrial X-rays to be made on site comprises a film cassette having an area for a supply of film and an exposure area and the cassette after exposure of a film is placed in the throat of a processor. Upon placing the cassette in the throat of the processor a rack and pinion dispenses an exposed film from the cassette and upon removal of the cassette a film is moved from the storage area to the exposure area. The exposed film is processed in the processor.
Inventors
- 👤 John A. Svendsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:28
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/003; G03B; G03B42/00; G03B42/02; G03B42/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
244 words
A cassette for use with sheets of film to permit exposure of one sheet in an exposure position and then the dispensing of the exposed sheet and the feeding of another sheet from a supply of sheets to said exposure position, said cassette comprising a housing, said housing comprising a generally rectangular top and bottom wall spaced by connecting side and end walls, said bottom wall affording X-ray exposure of a said sheet therethrough, storage means for containment of a number of sheets in said housing between said said top and bottom wall, one said end wall having an opening through which an exposed sheet may be dispensed, means forming a light seal at said opening, movable pressure pad means for pressing a sheet against said bottom wall, a first drive roller means disposed within said housing for advancing a sheet between said pressure pad means and said bottom wall, a second drive roller means for driving an exposed sheet from between said pressure pad means and said bottom wall out said opening, and drive means, including first and second pinion gears external to said side walls of the cassette, for operation of said first and second drive roller means respectively in response to external forces being placed against said drive means; and one-way bearings for each of said first drive roller means and said second drive roller means affording rotation with said first and second pinion gears each in only one respective direction.
Claim 2
Dependent Claim
244 words
A cassette for use with sheets of film to permit exposure of one sheet in an exposure position and then the dispensing of the exposed sheet and the feeding of another sheet from a supply of sheets to said exposure position, said cassette comprising a housing, said housing comprising a generally rectangular top and bottom wall spaced by connecting side and end walls, said bottom wall affording X-ray exposure of a said sheet therethrough, storage means for containment of a number of sheets in said housing between said said top and bottom wall, one said end wall having an opening through which an exposed sheet may be dispensed, means forming a light seal at said opening, movable pressure pad means for pressing a sheet against said bottom wall, a first drive roller means disposed within said housing for advancing a sheet between said pressure pad means and said bottom wall, a second drive roller means for driving an exposed sheet from between said pressure pad means and said bottom wall out said opening, and drive means, including first and second pinion gears external to said side walls of the cassette, for operation of said first and second drive roller means respectively in response to external forces being placed against said drive means; and one-way bearings for each of said first drive roller means and said second drive roller means affording rotation with said first and second pinion gears each in only one respective direction.
Claim 3
Dependent Claim
16 words
A cassette corresponding to claim 1 further including an intensifying screen positioned on said bottom wall.
Claim 4
Dependent Claim
24 words
A cassette corresponding to claim 2 further including a shield to protect sheets in said storage means from radiation passing through said bottom wall.
Claim 5
Dependent Claim
29 words
A cassette corresponding to claim 1 wherein said pinion gears are disposed outside said housing and adjacent said side walls for driving said rollers upon engagement with stationary racks.
Claim 6
Dependent Claim
176 words
A film handling system affording the exposure and development of successive sheets of X-ray sensitive media comprising a cassette having a light-tight rectangular housing in which are means defining a sheet storage area and an individual sheet exposing are, drive roller means for moving a sheet form said sheet storage area to said exposing area and for dispensing an exposed sheet from said housing, pinion gears external to said housing for driving said drive roller means in one direction to afford movement of a sheet to said exposing area form said storage area and to dispense the exposed sheet from the housing, and a processor for receiving and developing a said sheet, said processor having a chute to receive said cassette, said chute being aligned with a sheet receiving opening of said processor to receive a sheet dispensed from said cassette, said chute including a pair of racks in engagement with said pinion gears for driving said drive roller means upon insertion of said cassette into said chute and removal of said cassette from said chute.
Claim 7
Dependent Claim
176 words
A film handling system affording the exposure and development of successive sheets of X-ray sensitive media comprising a cassette having a light-tight rectangular housing in which are means defining a sheet storage area and an individual sheet exposing are, drive roller means for moving a sheet form said sheet storage area to said exposing area and for dispensing an exposed sheet from said housing, pinion gears external to said housing for driving said drive roller means in one direction to afford movement of a sheet to said exposing area form said storage area and to dispense the exposed sheet from the housing, and a processor for receiving and developing a said sheet, said processor having a chute to receive said cassette, said chute being aligned with a sheet receiving opening of said processor to receive a sheet dispensed from said cassette, said chute including a pair of racks in engagement with said pinion gears for driving said drive roller means upon insertion of said cassette into said chute and removal of said cassette from said chute.
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) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |