Patent US4739375A successfully refreshed from Google Patents.
US4739375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing internegatives and slides
Assignee: ECB TECHNOLOGIES Inc A CORP OF DISTRICT OF COLUMBIA
•
Filing: 1987-02-20
•
Granted: 1988-04-19
•
Expires: 2007-02-20
Abstract
Abstract An apparatus for producing internegatives includes a slide holder for positioning the slide from which the internegative is to made, a primary photoflash unit for back-illuminating the slide and projecting the image thereof into a camera, a secondary photoflash unit for directing a contrast correction exposure into the camera via a reflecting plate, and a stored programmed controlled processor for controlling the time duration of the primary exposure, the contrast correction exposure, and the operation of the camera so as to properly exposure the film in the camera. A back-illuminated light screen is provided to allow the operator to evaluate the brightness of the slide so as to control the duration of the primary exposure and the contrast correction to consistently produce properly exposed internegatives. In a second embodiment, a single photoflash unit, in cooperating with a movably mounted neutral density filter, is used to effect both the primary and contrast correcting exposures.
Inventors
- 👤 Roman Kuzyk
- 👤 Richard H. Bender
- 👤 Lewis Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:22
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/62; G03B27/6207; G03B27/323
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
194 words
An apparatus for producing an exposed film image of a transparency, comprising: means for positioning a transparency from which an exposed film image is to be made; means for determining the presence or absence of a transparency positioned by said first-mentioned means and for providing a signal at least indicative of the absence of a transparency; camera means having a selectively controllable shutter for exposing film therein with an image of a transparencey positioned by said first-mentioned means; illumination means selectively controlled to project light onto the transparency for a selected time duration to expose film in said camera means with an image of the transparency; and control means coupled to said camera means and said illumination means for selectively opening said shutter and controlling said illumination means to project light onto the transparency for a selected time duration to expose film in said camera means with an image of the transparency and responsive to a signal from said second-mentioned means indicative of the absence of a transparency to control said illumination means to project light for another selected time duration into said camera means to further expose the film in said camera means.
Claim 2
Independent Claim
194 words
An apparatus for producing an exposed film image of a transparency, comprising: means for positioning a transparency from which an exposed film image is to be made; means for determining the presence or absence of a transparency positioned by said first-mentioned means and for providing a signal at least indicative of the absence of a transparency; camera means having a selectively controllable shutter for exposing film therein with an image of a transparencey positioned by said first-mentioned means; illumination means selectively controlled to project light onto the transparency for a selected time duration to expose film in said camera means with an image of the transparency; and control means coupled to said camera means and said illumination means for selectively opening said shutter and controlling said illumination means to project light onto the transparency for a selected time duration to expose film in said camera means with an image of the transparency and responsive to a signal from said second-mentioned means indicative of the absence of a transparency to control said illumination means to project light for another selected time duration into said camera means to further expose the film in said camera means.
Claim 3
Dependent Claim
50 words
The apparatus of claim 1, further comprising: filter means movably mounted for movement between an operative position to filter light entering said camera means and an inoperative position and coupled to said second-mentioned means for movement to said inoperative position in response to a transparency positioned by said first-mentioned means.
Claim 4
Dependent Claim
14 words
The apparatus of claim 2, wherein said filter means comprises a neutral density filter.
Claim 5
Dependent Claim
23 words
The apparatus of claim 2, wherein said filter means comprises an electrical actuator for effecting movement thereof between the operative and inoperative positions.
Claim 6
Dependent Claim
32 words
The apparatus of claim 2, wherein said filter means comprises a mechanical linkage responsive to the presence or absence of the transparency for effecting movement thereof between the inoperative and operative positions.
Claim 7
Dependent Claim
29 words
The apparatus of claim 1, further comprising: color correction filter means movably mounted between a first position to filter light entering said camera means and a second inoperative position.
Claim 8
Dependent Claim
32 words
The apparatus of claim 6, further comprising: means for determining the position of said color correction filter means and providing a signal indicative of said color correction filter in its first position.
Claim 9
Dependent Claim
48 words
The apparatus of claim 7, wherein said control means responds to said signal indicative of said color correction filter in its first position to change the control of said illumination means to the light projected onto transparency to vary the exposure of the film in said camera means.
Claim 10
Dependent Claim
28 words
The apparatus of claim 1, further comprising: user operable switch means for inhibiting operation of said illumination means to effect the other of the selected time duration exposures.
Claim 11
Dependent Claim
15 words
The apparatus of claim 1, wherein said illumination means comprises a selectively triggerable photoflash tube.
Claim 12
Dependent Claim
23 words
The apparatus of claim 10, wherein said illumination means further comprises a light exit panel through which light from said photoflash tube passes.
Claim 13
Dependent Claim
40 words
The apparatus of claim 11, wherein said illumination means further comprises a housing for mounting said photo tube and said light exit panel, said housing configured so light from said photoflash tube does not directly irradiate said light exit panel.
Claim 14
Dependent Claim
18 words
The apparatus of claim 11, wherein said light exit panel is fabricated rom a translucent, light diffusing material.
Claim 15
Dependent Claim
27 words
The apparatus of claim 11, wherein said first-mentioned means comprises a bracket having spaced guides each with a groove for supporting a side edge of a transparency.
Claim 16
Dependent Claim
31 words
The apparatus of claim 11, wherein said first-mentioned means comprises a bracket having spaced apart, resiliently mounted guide means each with a groove for supporting a side edge of a transparency.
Claim 17
Independent Claim
208 words
An apparatus for producing an exposed film image of a transparency, comprising: means for determining the relative brightness of a transparency from which film is to be exposed; means for providing a signal representative of the relative brightness of the transparency; means for positioning a transparency from which an exposed film image is to be made; means for determining the presence or absence of a transparency positioned by said positioning means and for providing a signal at least indicative of the absence of a transparency; camera means having a selectively controllable shutter for exposing film therein with an image of a transparency positioned by said third-mentioned means; illumination means selectively controllable to project light onto the transparency for a selected time duration to expose film in said camera means with an image of the transparency; control means coupled to said camera means and said illumination means and said fourth-mentioned means for selectively opening said shutter and controlling said illumination means to project light onto the transparency for a selected time duration to expose film in said camera means with an image of the transparency and responsive to the relative brightness signal to at least partially control the selected time duration as a function of the relative brightness signal.
Claim 18
Independent Claim
208 words
An apparatus for producing an exposed film image of a transparency, comprising: means for determining the relative brightness of a transparency from which film is to be exposed; means for providing a signal representative of the relative brightness of the transparency; means for positioning a transparency from which an exposed film image is to be made; means for determining the presence or absence of a transparency positioned by said positioning means and for providing a signal at least indicative of the absence of a transparency; camera means having a selectively controllable shutter for exposing film therein with an image of a transparency positioned by said third-mentioned means; illumination means selectively controllable to project light onto the transparency for a selected time duration to expose film in said camera means with an image of the transparency; control means coupled to said camera means and said illumination means and said fourth-mentioned means for selectively opening said shutter and controlling said illumination means to project light onto the transparency for a selected time duration to expose film in said camera means with an image of the transparency and responsive to the relative brightness signal to at least partially control the selected time duration as a function of the relative brightness signal.
Claim 19
Dependent Claim
50 words
The apparatus of claim 16, wherein said control means is responsive to a signal from said positioning means indicative of the absence of a transparency to control said illumination means to project light for another selected time duration into said camera to further expose the film in said camera means.
Claim 20
Dependent Claim
50 words
The apparatus of claim 17, further comprising: filter means movably mounted for movement between an operative position to filter light entering said camera means and an inoperative position and coupled to said fourth-mentioned means for movement to said inoperative position in response to a transparency positioned by said third-mentioned means.
Claim 21
Dependent Claim
14 words
The apparatus of claim 18 wherein said filter means comprises a neutral density filter.
Claim 22
Dependent Claim
23 words
The apparatus of claim 18, wherein said filter means comprises an electrical actuator for effecting movement thereof between the operative and inoperative positions.
Claim 23
Dependent Claim
32 words
The apparatus of claim 18, wherein said filter means comprises a mechanical linkage responsive to the presence or absence of the transparency for effecting movement thereof between the inoperative and operative positions.
Claim 24
Dependent Claim
29 words
The apparatus of claim 16, further comprising: color correction filter means movably mounted between a first position to filter light entering said camera means and a second inoperative position.
Claim 25
Dependent Claim
32 words
The apparatus of claim 22, further comprising: means for determining the position of said color correction filter means and providing a signal indicative of said color correction filter in its first position.
Claim 26
Dependent Claim
49 words
The apparatus of claim 23, wherein said control means responds to said signal indicative of said color correction filter in its first position to change the control of said illumination means to vary the light projected onto transparency to vary the exposure of the film in said camera means.
Claim 27
Dependent Claim
28 words
The apparatus of claim 17, further comprising: user operable switch means for inhibiting operation of said illumination means to effect the other of the selected time duration exposures.
Claim 28
Dependent Claim
14 words
The apparatus of claim 16, wherein said illumination means comprises selectively triggerable photoflash tube.
Claim 29
Dependent Claim
23 words
The apparatus of claim 16, wherein said illumination means further comprises a light exit panel through which light from said photoflash tube passes.
Claim 30
Dependent Claim
27 words
The apparatus of claim 16, wherein said third-mentioned means comprises a bracket having spaced guides each with a groove for supporting a side edge of a transparency.
Claim 31
Dependent Claim
31 words
The apparatus of claim 16, wherein said third-mentioned means comprises a bracket having spaced apart, resiliently mounted guide means each with a groove for supporting a side edge of a transparency.
References Cited (Backward Citations)
US3060796A
Cited
US3308716A
Cited
FR1460895A
Cited
US3645620A
Cited
US3754825A
Cited
US4043662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-19 | 1991-10-19 | 1992-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-19 | 1995-10-19 | 1996-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-19 | 1999-10-19 | 2000-04-19 | $7700.00 | Window Closed / Lapsed |