Patent US4692773A successfully refreshed from Google Patents.
US4692773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming method using image forming elements having different concentrations and pitches
Assignee: Canon Inc
•
Filing: 1986-01-02
•
Granted: 1987-09-08
•
Expires: 2006-01-02
Abstract
Abstract A method for forming images with a gradation characteristic based on the arrangement of image forming elements comprises modulating an arrangement pitch of the image forming elements in at least one arrangement direction without quantization in accordance with the gradation level.
Inventors
- 👤 Asao Saito
- 👤 Kunio Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:55
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/50; H04N1/40; H04N1/40025; H04N1/40031; H04N1/40087
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
103 words
A method of forming on a medium an image with areas having different light-reflecting properties providing different optical reflection densities, the method comprising: providing on the medium a plurality of image forming elements, at least one color of which is provided in different concentrations, with different pitches therebetween in different areas of the image; and selecting the concentrations of said image forming elements and the pitch thereof in accordance with the optical reflection densities of respective areas of the image to be formed, wherein the pitches of higher concentration image forming elements are greater than the pitches of lower concentration image forming elements.
Claim 2
Independent Claim
103 words
A method of forming on a medium an image with areas having different light-reflecting properties providing different optical reflection densities, the method comprising: providing on the medium a plurality of image forming elements, at least one color of which is provided in different concentrations, with different pitches therebetween in different areas of the image; and selecting the concentrations of said image forming elements and the pitch thereof in accordance with the optical reflection densities of respective areas of the image to be formed, wherein the pitches of higher concentration image forming elements are greater than the pitches of lower concentration image forming elements.
Claim 3
Dependent Claim
21 words
A method according to claim 1, wherein the image forming elements are ink dots formed by inks having different dye concentrations.
Claim 4
Dependent Claim
27 words
A method according to claim 1, wherein said image forming elements are provided in a plurality of colors and in a plurality of concentrations for each color.
Claim 5
Dependent Claim
18 words
A method according to claim 3, wherein one of the colors of the image forming elements are black.
Claim 6
Dependent Claim
29 words
A method according to claim 3, wherein the colors of the image forming elements are selected from the group consisting of cyan, magenta, yellow, red, green, blue and black.
Claim 7
Independent Claim
108 words
A method of forming on a medium an image with areas having different light-reflecting properties providing different optical reflection densities, the method comprising: providing on the medium a plurality of image forming elements, at least one color of which is provided in different concentrations, with different areas and different pitches therebetween in different areas of the image; and selecting the concentrations and areas of said image forming elements and the pitch thereof in accordance with the optical reflection densities of respective areas of the image to be formed, wherein the pitches of higher concentration image forming elements are greater than the pitches of lower concentration image forming elements.
Claim 8
Independent Claim
108 words
A method of forming on a medium an image with areas having different light-reflecting properties providing different optical reflection densities, the method comprising: providing on the medium a plurality of image forming elements, at least one color of which is provided in different concentrations, with different areas and different pitches therebetween in different areas of the image; and selecting the concentrations and areas of said image forming elements and the pitch thereof in accordance with the optical reflection densities of respective areas of the image to be formed, wherein the pitches of higher concentration image forming elements are greater than the pitches of lower concentration image forming elements.
Claim 9
Dependent Claim
21 words
A method according to claim 6, wherein the image forming elements are ink dots formed by inks having different dye concentrations.
Claim 10
Dependent Claim
26 words
A method according to claim 6, wherein said image forming elements are provided in a plurality of colors and a plurality of concentrations for each color.
Claim 11
Dependent Claim
18 words
A method according to claim 8, wherein one of the colors of the image forming elements are black.
Claim 12
Dependent Claim
29 words
A method according to claim 8, wherein the colors of the image forming elements are selected from the group consisting of cyan, magenta, yellow, red, green, blue and black.
References Cited (Backward Citations)
US27555A
Cited
US1790723A
Cited
US1656338A
Cited
US1817098A
Cited
US3197558A
Cited
US3404221A
Cited
USRE27555E
Cited
US3681650A
Cited
US3739084A
Cited
US3683212A
Cited
US3747120A
Cited
US3864696A
Cited
US3961306A
Cited
US4050077A
Cited
US4108654A
Cited
US3977007A
Cited
JPS5211712A
Cited
JPS53102034A
Cited
US4178597A
Cited
US4389712A
Cited
US4386272A
Cited
US4386272C1
Cited
US4272771A
Cited
US4414635A
Cited
US4468706A
Cited
US4314274A
Cited
US4394693A
Cited
US4353079A
Cited
US4313684A
Cited
US4342051A
Cited
US4339774A
Cited
US4368491A
Cited
US4300142A
Cited
US4403874A
Cited
US4547812A
Cited
US4394662A
Cited
US4431319A
Cited
US4413275A
Cited
US4412225A
Cited
US4412226A
Cited
JPS57156264A
Cited
US4365275A
Cited
US4446470A
Cited
JPS5860878A
Cited
US4438453A
Cited
US4580150A
Cited
US4549222A
Cited
US4488245A
Cited
US4533928A
Cited
US4492965A
Cited
US4559542A
Cited
JPS58212970A
Cited
US4560997A
Cited
US4604654A
Cited
US4499479A
Cited
JPS5941969A
Cited
US4494128A
Cited
JPS5952658A
Cited
US4595948A
Cited
US4631578A
Cited
US4635078A
Cited
US4533923A
Cited
US4533920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |