Patent US4269891A successfully refreshed from Google Patents.
US4269891A
Expired / Lapsed
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Recording sheet for ink jet recording
Assignee: Fujifilm Holdings Corp
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Filing: 1979-06-28
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Granted: 1981-05-26
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Expires: 1999-06-28
Abstract
Abstract A recording sheet comprising a support and an ink absorbing layer provided thereon, said recording sheet having a degree of opacity ranging from 55.0% to 97.5% and said ink absorbing layer having an ink absorbing power of about 1.5 mm per minute to 18.0 mm per minute, which is useful in an ink jet recording process and images and characters recorded thereon can be clearly seen by both reflected and transmitted light.
Inventors
- 👤 Nobuhiko Minagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:42
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; B41M5/502; B41M5/508; B41M5/5218; B41M5/5236; B41M5/5254; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/24934; Y10T428/25; Y10T428/256; Y10T428/258; Y10T428/259; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/266; Y10T428/31
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
84 words
An ink jet recording sheet which can be viewed under both reflected and transmitted light comprising a support and an ink absorbing layer provided thereon comprising a white pigment having ink adsorbing ability and a binder resin possessing film forming ability, wherein the weight ratio of white pigment to binder resin is about 0.2 to 10, the degree of opacity of said sheet being about 55.0 to 97.5% and the ink absorbing power of said ink absorbing layer being about 1.5 to 18.0 mm/min.
Claim 2
Dependent Claim
84 words
An ink jet recording sheet which can be viewed under both reflected and transmitted light comprising a support and an ink absorbing layer provided thereon comprising a white pigment having ink adsorbing ability and a binder resin possessing film forming ability, wherein the weight ratio of white pigment to binder resin is about 0.2 to 10, the degree of opacity of said sheet being about 55.0 to 97.5% and the ink absorbing power of said ink absorbing layer being about 1.5 to 18.0 mm/min.
Claim 3
Dependent Claim
18 words
The ink jet recording sheet of claim 1, wherein the degree of opacity is about 65.0 to 95.0%.
Claim 4
Dependent Claim
20 words
The ink jet recording sheet of claim 1, wherein the ink absorbing power is about 2.0 mm/min to 15.0 mm/min.
Claim 5
Dependent Claim
35 words
The ink jet recording sheet of claim 4, wherein said white pigment is clay, talc, diatomaceous earth, calcium carbonate, calcium sulfate, barium sulfate, titanium oxide, zinc oxide, zinc sulfide, satin white, aluminum silicate, or lithopone.
Claim 6
Dependent Claim
25 words
The ink jet recording sheet of claim 4, wherein said binder is oxidized starch, etherified starch, gelatin, casein, carboxymethylcellulose, hydroxyethylcellulose, polyvinyl alcohol, or SBR latex.
Claim 7
Dependent Claim
18 words
The ink jet recording sheet of claim 1, wherein said support is paper or a thermoplastic resin film.
Claim 8
Dependent Claim
17 words
The ink jet recording sheet of claim 6, wherein said paper is 30 to 150 μm thick.
Claim 9
Dependent Claim
16 words
The ink jet recording sheet of claim 7, wherein said support is said thermoplastic resin film.
Claim 10
Dependent Claim
21 words
The ink jet recording sheet of claim 8, wherein said thermoplastic resin film is about 10 to about 20 μm thick.
Claim 11
Dependent Claim
20 words
The ink jet recording sheet of claim 1, wherein said ink absorbing layer is at least about 3 μm thick.
Claim 12
Dependent Claim
21 words
The ink jet recording sheet of claim 9, wherein said ink absorbing layer is about 5 to about 50 μm thick.
References Cited (Backward Citations)
US3889270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |