Patent US4686138A successfully refreshed from Google Patents.
US4686138A
Expired / Lapsed
US
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Direct image offset printing plates
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1986-06-11
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Granted: 1987-08-11
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Expires: 2006-06-11
Abstract
Abstract There is disclosed a direct image printing plate for offset printing which comprises a water resistant support and an image receiving layer provided thereon which comprises an inorganic pigment and a mixed binder comprising a water-soluble high polymer compound and a synthetic high polymer latex. There is also disclosed a direct image printing plate for offset printing which comprises a water resistant support and an image receiving layer provided thereon which comprises a mixed pigment comprising a synthetic silica fine powder of 20μ or less in particle diameter and a colloidal silica of 50 mμ or less in particle diameter and a binder which is preferably polyvinyl alcohol.
Inventors
- 👤 Koji Toyama
- 👤 Hideo Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:33
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/10; B41C1/1091; B41N; B41N3/00; B41N3/03; B41N3/036; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24934; Y10T428/25; Y10T428/259
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
42 words
A direct image printing plate for offset printing which comprises a water resistant support and an image receiving layer provided thereon which comprises an inorganic pigment and a mixed binder comprising a water-soluble high polymer compound and a synthetic high polymer latex.
Claim 2
Dependent Claim
42 words
A direct image printing plate for offset printing which comprises a water resistant support and an image receiving layer provided thereon which comprises an inorganic pigment and a mixed binder comprising a water-soluble high polymer compound and a synthetic high polymer latex.
Claim 3
Dependent Claim
54 words
A direct image printing plate for offset printing which comprises a water resistant support and an image receiving layer provided thereon which comprises a mixed pigment comprising a synthetic silica fine powder of 20μ or less in particle diameter and a colloidal silica of 50 mμ or less in particle diameter and a binder.
Claim 4
Dependent Claim
54 words
A direct image printing plate for offset printing which comprises a water resistant support and an image receiving layer provided thereon which comprises a mixed pigment comprising a synthetic silica fine powder of 20μ or less in particle diameter and a colloidal silica of 50 mμ or less in particle diameter and a binder.
Claim 5
Dependent Claim
40 words
A direct image printing plate for offset printing according to claim 1 wherein the mixed binder comprises 5 to 80 parts by weight of the synthetic high polymer latex and 100 parts by weight of the water-soluble high polymer compound.
Claim 6
Dependent Claim
21 words
A direct image printing plate for offset printing according to claim 1 wherein the water-soluble high polymer compound is polyvinyl alcohol.
Claim 7
Dependent Claim
22 words
A direct image printing plate for offset printing according to claim 1 wherein the synthetic high polymer latex is an acrylic emulsion.
Claim 8
Dependent Claim
24 words
A direct image printing plate for offset printing according to claim 2 wherein the inorganic pigment comprises at least 30% of the mixed pigment.
Claim 9
Dependent Claim
30 words
A direct image printing plate for offset printing according to claim 2 wherein the mixing ratio of the synthetic silica fine powder and the colloidal silica is 20:80 to 80:20.
Claim 10
Dependent Claim
18 words
A direct image printing plate for offset printing according to claim 2 wherein the binder is polyvinyl alcohol.
Claim 11
Dependent Claim
32 words
A direct image printing plate for offset printing according to claim 1 wherein the amount of the mixed binder is 3 to 30 parts for 100 parts by weight of the pigment.
Claim 12
Dependent Claim
25 words
A direct image printing plate for offset printing according to claim 1 which has an intermediate layer between the support and the image receiving layer.
Claim 13
Dependent Claim
25 words
A direct image printing plate for offset printing according to claim 2 which has an intermediate layer between the support and the image receiving layer.
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) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |