Patent US3854816A successfully refreshed from Google Patents.
US3854816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic printing apparatus
Assignee: Fujifilm Holdings Corp
•
Filing: 1973-01-29
•
Granted: 1974-12-17
•
Expires: 1993-01-29
Abstract
Abstract An apparatus for producing a photographic image and producing the desired gradation, comprises a light source of high intensity, at least one shutter for varying the exposure time and means for controlling the intensity of the light inversely proportionally to the exposure time. The apparatus may comprise, for instance, three shutters which are adapted for exposure time of 0.01 second, 0.1 second and 1 second respectively. The shutters are rotatable disks with fan-shaped apertures, provided with filters of different density, the exposure time being controlled by the degree of the angle of the apertures.
Inventors
- 👤 I Fujimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:59
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
129 words
An apparatus for producing a photographic image and for producing the desired gradation from one kind of printing paper comprising a high intensity light source capable of producing a latent image on sensitized printing paper by an exposure of 0.01 second to 1 second, an electric power source for adjusting and effective light-up time of the light source connected thereto, means for varying the intensity of the light, in inverse proportion to the exposure time, at least one shutter for varying the exposure time between 1 second and 0.01 second and means for controlling the intensity of the light to adjust the density of the image produced and for varying the exposure time inversely proportionally to the light intensity, a lens and a light sensitive material containing silver halide.
Claim 2
Independent Claim
129 words
An apparatus for producing a photographic image and for producing the desired gradation from one kind of printing paper comprising a high intensity light source capable of producing a latent image on sensitized printing paper by an exposure of 0.01 second to 1 second, an electric power source for adjusting and effective light-up time of the light source connected thereto, means for varying the intensity of the light, in inverse proportion to the exposure time, at least one shutter for varying the exposure time between 1 second and 0.01 second and means for controlling the intensity of the light to adjust the density of the image produced and for varying the exposure time inversely proportionally to the light intensity, a lens and a light sensitive material containing silver halide.
Claim 3
Dependent Claim
27 words
The apparatus according to claim 1 wherein the means for controlling the intensity of the light in inverse proportion to the exposure time comprises a wedge-shaped member.
Claim 4
Dependent Claim
16 words
The apparatus according to claim 1 wherein the light source is a high pressure mercury lamp.
Claim 5
Dependent Claim
28 words
The apparatus according to claim 2, wherein the means for controlling the exposure time and the intensity of light comprise a gradation selector connected to said wedge-shaped member.
Claim 6
Dependent Claim
30 words
The apparatus according to claim 1, wherein a printing intensity control iris is provided in alignment with said shutter for controlling the total amount of the light in an exposure.
Claim 7
Dependent Claim
12 words
The apparatus according to claim 1 which comprises at least two shutters.
Claim 8
Dependent Claim
45 words
The apparatus according to claim 6 wherein said shutters are disks provided with apertures, the size of the apertures being different, and said shutters are provided with filters of different density in said apertures, whereby the amount of transmitted light through said apertures is equal.
Claim 9
Dependent Claim
21 words
The apparatus according to claim 7 which comprises means for rotating said disks around an axis of rotation at equal speed.
References Cited (Backward Citations)
US3096176A
Cited
US3205767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |