US3677641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic printing apparatus
Assignee: Eastman Kodak Co
•
Filing: 1970-08-24
•
Granted: 1972-07-18
•
Expires: 1990-08-24
Abstract
Abstract The need for a manual adjustment to the exposure to be made by a photographic printer having average and point-by-point density determining apparatuses is obviated by a device for selecting a principal subject area of a negative from which said point-bypoint density data is derived.
Inventors
- 👤 James L King
- 👤 Lee O Arrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:33
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/80; G03B27/73; G03B27/735
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
204 words
In a photographic printer having: a. control means for regulating the exposure of print material, and b. means responsive to the density characteristics of the means to be printed for controlling the operation of said control means, said responsive means comprising: 1. means for producing a signal proportional to the average density of said means to be printed, 2. means for scanning said means to be printed and producing signals representative of the point-by-point density characteristics of at least some area of said means to be printed, 3. means adapted to receive said signals from said scanning means for producing a correction signal, and 4. means for combining said average density signal and said correction signal into a resultant signal, said resultant signal being applied to said control means for regulating said exposure of said print material, the improvement of means cooperative with said responsive means for producing signals corresponding to a set of point-by-point density characteristics for respective areas within said area of said means to be printed, and means for weighting the different point-by-point density characteristics within said set thereof according to the respective areas of said means to be printed, thereby to produce a correction signal for said average density signal.
Claim 2
Dependent Claim
204 words
In a photographic printer having: a. control means for regulating the exposure of print material, and b. means responsive to the density characteristics of the means to be printed for controlling the operation of said control means, said responsive means comprising: 1. means for producing a signal proportional to the average density of said means to be printed, 2. means for scanning said means to be printed and producing signals representative of the point-by-point density characteristics of at least some area of said means to be printed, 3. means adapted to receive said signals from said scanning means for producing a correction signal, and 4. means for combining said average density signal and said correction signal into a resultant signal, said resultant signal being applied to said control means for regulating said exposure of said print material, the improvement of means cooperative with said responsive means for producing signals corresponding to a set of point-by-point density characteristics for respective areas within said area of said means to be printed, and means for weighting the different point-by-point density characteristics within said set thereof according to the respective areas of said means to be printed, thereby to produce a correction signal for said average density signal.
Claim 3
Dependent Claim
28 words
means for scanning said means to be printed and producing signals representative of the point-by-point density characteristics of at least some area of said means to be printed,
Claim 4
Dependent Claim
28 words
means for scanning said means to be printed and producing signals representative of the point-by-point density characteristics of at least some area of said means to be printed,
Claim 5
Dependent Claim
41 words
In a photographic printer having: a. control means for regulating the exposure of print material, and b. means responsive to the density characteristics of the means to be printed for controlling the operation of said control means, said responsive means comprising:
Claim 6
Dependent Claim
41 words
In a photographic printer having: a. control means for regulating the exposure of print material, and b. means responsive to the density characteristics of the means to be printed for controlling the operation of said control means, said responsive means comprising:
Claim 7
Dependent Claim
45 words
means for scanning said means to be printed and producing signals representative of the point-by-point density characteristics of at least some area of said means to be printed, 3 means adapted to receive said signals from said scanning means for producing a correction signal, and
Claim 8
Dependent Claim
45 words
means for scanning said means to be printed and producing signals representative of the point-by-point density characteristics of at least some area of said means to be printed, 3 means adapted to receive said signals from said scanning means for producing a correction signal, and
Claim 9
Dependent Claim
16 words
means adapted to receive said signals from said scanning means for producing a correction signal, and
Claim 10
Dependent Claim
16 words
means adapted to receive said signals from said scanning means for producing a correction signal, and
Claim 11
Dependent Claim
20 words
The improvement of claim 2 including a reticle for defining the respective areas of the said means to be printed.
Claim 12
Dependent Claim
41 words
The improvement of claim 2 wherein said switch means are arranged in the form of a keyboard, the respective keys of which are positioned on said keyboard to correspond positionwise with respective areas of and within said means to be printed.
Claim 13
Dependent Claim
99 words
means for combining said average density signal and said correction signal into a resultant signal, said resultant signal being applied to said control means for regulating said exposure of said print material, the improvement of means cooperative with said responsive means for producing signals corresponding to a set of point-by-point density characteristics for respective areas within said area of said means to be printed, and means for weighting the different point-by-point density characteristics within said set thereof according to the respective areas of said means to be printed, thereby to produce a correction signal for said average density signal.
Claim 14
Dependent Claim
99 words
means for combining said average density signal and said correction signal into a resultant signal, said resultant signal being applied to said control means for regulating said exposure of said print material, the improvement of means cooperative with said responsive means for producing signals corresponding to a set of point-by-point density characteristics for respective areas within said area of said means to be printed, and means for weighting the different point-by-point density characteristics within said set thereof according to the respective areas of said means to be printed, thereby to produce a correction signal for said average density signal.
Claim 15
Dependent Claim
88 words
means for combining said average density signal and said correction signal into a resultant signal, said resultant signal being applied to said control means for regulating said exposure of said print material, the improvement of means cooperative with said responsive means for selecting an area from within said area of said means to be printed form which said correction signal shall be predominantly dependent, said means for selecting comprising a plurality of switch means, each of which corresponds to a respective area of the means to be printed.
Claim 16
Dependent Claim
88 words
means for combining said average density signal and said correction signal into a resultant signal, said resultant signal being applied to said control means for regulating said exposure of said print material, the improvement of means cooperative with said responsive means for selecting an area from within said area of said means to be printed form which said correction signal shall be predominantly dependent, said means for selecting comprising a plurality of switch means, each of which corresponds to a respective area of the means to be printed.
Claim 17
Dependent Claim
88 words
Apparatus for use with a photographic printer comprising: a. means for scanning a negative from which a print is to be made to produce signals representative of the point-by-point optical density of said negative, b. means for selecting from all said density signals those signals which correspond to a selected area of interest within said negative, c. means adapted to receive said selected signals for computing therefrom a control signal, and d. means reSponsive to said control signal for regulating in accordance therewith the exposure of said printer.
Claim 18
Dependent Claim
88 words
Apparatus for use with a photographic printer comprising: a. means for scanning a negative from which a print is to be made to produce signals representative of the point-by-point optical density of said negative, b. means for selecting from all said density signals those signals which correspond to a selected area of interest within said negative, c. means adapted to receive said selected signals for computing therefrom a control signal, and d. means reSponsive to said control signal for regulating in accordance therewith the exposure of said printer.
Claim 19
Dependent Claim
43 words
The apparatus of claim 5 wherein said selecting means comprises a keyboard, and respective switch means cooperative with the keys of said keyboard, said switch means being respectively adapted to apply selected signals from among said density signals to said exposure regulating means.
Claim 20
Dependent Claim
58 words
The apparatus of claim 6 wherein said keyboard has an area format substantially like the area format of a negative to be printed by said printer, and wherein each of said switch means cooperative with the said keys is adapted to apply to said exposure regulating means density signals respectively corresponding to a respective area within said negative.
Claim 21
Dependent Claim
27 words
The apparatus of claim 7 including reticle means cooperative with said negative to subdivide said negative into areas corresponding to the arrangement of keys on said keyboard.
Claim 22
Dependent Claim
94 words
In a photographic printer, a. means for scanning line-by-line a means to be printed and producing therefrom signals representing the point-by-point optical density of said means to be printed, b. means for dividing the signals from each of said scan lines into line-segment groups of signals, c. means for grouping the signals from said scan lines into sets of signals, d. means for selecting signals which simultaneously obtain in a given set and a given group of signals, and e. means responsive to the selected signals for controlling the printing exposure of said printer.
Claim 23
Dependent Claim
94 words
In a photographic printer, a. means for scanning line-by-line a means to be printed and producing therefrom signals representing the point-by-point optical density of said means to be printed, b. means for dividing the signals from each of said scan lines into line-segment groups of signals, c. means for grouping the signals from said scan lines into sets of signals, d. means for selecting signals which simultaneously obtain in a given set and a given group of signals, and e. means responsive to the selected signals for controlling the printing exposure of said printer.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |