US4073968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for desensitization of a color developer
Assignee: Fujifilm Holdings Corp
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Filing: 1976-10-27
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Granted: 1978-02-14
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Expires: 1996-10-27
Abstract
Abstract A method of desensitization of a color developer to form a color upon reaction with a color former which comprises coating a photocurable composition containing a photocurable compound on a color developer sheet and then irradiating the coated surface with light to cure the photocurable compound and thereby desensitize the color developer surface.
Inventors
- 👤 Akio Miyamoto
- 👤 Hiroharu Matsukawa
- 👤 Teruo Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:04
CPC Classifications
G; G03; G03F; G03F7/00; B; B41; B41M; B41M5/00; B41M5/124; B41M5/128
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
47 words
A method for desensitization of a color developer sheet to form a color by reaction with a color former which comprises coating a photocurable composition on the color developer and then irradiating the coated color developer with light to cure the photocurable composition prior to color formation.
Claim 2
Independent Claim
47 words
A method for desensitization of a color developer sheet to form a color by reaction with a color former which comprises coating a photocurable composition on the color developer and then irradiating the coated color developer with light to cure the photocurable composition prior to color formation.
Claim 3
Dependent Claim
13 words
The method of claim 1, wherein said photocurable composition comprises a photocurable compound.
Claim 4
Dependent Claim
28 words
The method of claim 2, wherein said photocurable compound is selected from the group consisting of cinnamic acid compounds, chalcone acid compounds, stilbazole compounds and photocurable rubber compounds.
Claim 5
Dependent Claim
22 words
The method of claim 2, wherein said photocurable compound is selected from the group consisting of compounds containing vinyl or vinylidene linkages.
Claim 6
Dependent Claim
28 words
The method of claim 4, wherein said photocurable compound is a compound containing an acryl, acryloyl, acrylamide, allyl, unsaturated polyester, vinyl ester, vinyl ether, or vinyl thioether group.
Claim 7
Dependent Claim
22 words
The method of claim 2, wherein the photocurable composition contains one or more sensitizers, polymerization inhibitors, binders, fillers, oils, solvents and waxes.
Claim 8
Dependent Claim
24 words
The method of claim 6, wherein the amount of the sensitizer is about 0.01 to about 20% by weight based on the photocurable compound.
Claim 9
Dependent Claim
25 words
The method of claim 6, wherein the amount of the polymerization inhibitor is about 0.0001 to about 5% by weight based on the photocurable compound.
Claim 10
Independent Claim
65 words
A method for desenitization of a color developer sheet which comprises preparing a photocurable composition including a photocurable compound, coating the photocurable composition on a color developer sheet, and then irradiating the coated surface with light to cure the photocurable compound prior to color formation thereby reducing or destroying the function of the color developer to form a color by reaction with a color former.
Claim 11
Independent Claim
65 words
A method for desenitization of a color developer sheet which comprises preparing a photocurable composition including a photocurable compound, coating the photocurable composition on a color developer sheet, and then irradiating the coated surface with light to cure the photocurable compound prior to color formation thereby reducing or destroying the function of the color developer to form a color by reaction with a color former.
Claim 12
Independent Claim
75 words
A method for desensitization of a color developer sheet which comprises printing a photocurable composition containing a photocurable compound on selected areas of the surface of said sheet on which said color developer is present, and then irradiating the coated surface with light to cure the photocurable compound prior to color formation thereby desensitizing the ability of the color developer to form a color on reaction with a color former in those selected areas printed.
Claim 13
Independent Claim
75 words
A method for desensitization of a color developer sheet which comprises printing a photocurable composition containing a photocurable compound on selected areas of the surface of said sheet on which said color developer is present, and then irradiating the coated surface with light to cure the photocurable compound prior to color formation thereby desensitizing the ability of the color developer to form a color on reaction with a color former in those selected areas printed.
Claim 14
Independent Claim
116 words
A method for desensitization of selected areas of a color developer used in a pressure sensitive copying paper assembly including a layer of a color former and a layer of a color developer which causes a reaction to occur upon contact of said color former with said color developer which comprises coating a photocurable composition containing a photocurable compound on selected areas such that said layer of color former and said layer of color developer are separated by said photocurable composition and then irradiating the coated photocurable composition with light to cure the photocurable compound prior to color formation and thereby form a film between said layer of color developer and said layer of color former.
Claim 15
Independent Claim
116 words
A method for desensitization of selected areas of a color developer used in a pressure sensitive copying paper assembly including a layer of a color former and a layer of a color developer which causes a reaction to occur upon contact of said color former with said color developer which comprises coating a photocurable composition containing a photocurable compound on selected areas such that said layer of color former and said layer of color developer are separated by said photocurable composition and then irradiating the coated photocurable composition with light to cure the photocurable compound prior to color formation and thereby form a film between said layer of color developer and said layer of color former.
References Cited (Backward Citations)
US3952117A
Cited
US4007310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |