US4442172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink jet recording sheet
Assignee: Nippon Paper Industries Co Ltd
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Filing: 1982-07-02
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Granted: 1984-04-10
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Expires: 2002-07-02
Abstract
Abstract Ink jet recording sheet comprising more than 1 g/m 2 (as solid content) of water-soluble polymer coated onto the surface of a base sheet comprising uniformly 15-45 wt. parts of synthetic silicate 0.1-1 wt. part of a wet strength additive and 2-10 wt. parts of a particular glass fiber with respect to 100 wt. parts of wood pulp. This ink jet recording sheet provides superior ink absorbency and high recording density without feathering and also has superior stiffness and dimensional stability.
Inventors
- 👤 Hiroyo Oshima
- 👤 Matsukuma Daisaku
- 👤 Kojima Yutaka
- 👤 Kobayashi Yukio
- 👤 Nagai Koichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:54
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/63; D21H17/67; D21H17/68; B; B41; B41M; B41M5/00; B41M5/50; B41M5/502; B41M5/508; B41M5/52; D21H13/00; D21H13/36; D21H13/38; D21H13/40; B41M5/5236; B41M5/5254; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/25; Y10T428/256; Y10T428/259
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
Ink jet recording sheet characterized in that 1 g/m 2 or more (as solid content) of water-soluble polymer is coated onto the surface of a base sheet comprising a uniform mixture of 15-45 wt. parts of synthetic silicate and 0.1-1 wt. parts of a wet strength additive and 2-10 wt. parts of glass fiber of 5-7 μm diameter and 2-4 mm length with respect to 100 wt. parts of wood pulp.
Claim 2
Dependent Claim
71 words
Ink jet recording sheet characterized in that 1 g/m 2 or more (as solid content) of water-soluble polymer is coated onto the surface of a base sheet comprising a uniform mixture of 15-45 wt. parts of synthetic silicate and 0.1-1 wt. parts of a wet strength additive and 2-10 wt. parts of glass fiber of 5-7 μm diameter and 2-4 mm length with respect to 100 wt. parts of wood pulp.
Claim 3
Dependent Claim
30 words
Ink jet recording sheet according to claim 1, wherein said wood pulp is at least one member selected from the group consisting of chemical pulp, semi-chemical pulp and mechanical pulp.
Claim 4
Dependent Claim
39 words
Ink jet recording sheet according to claim 1, wherein said synthetic silicate comprises about 67-71 wt. % of SiO 2 , about 10-12 wt. % of Al 2 O 3 and about 6 wt. % of Na 2 O.
Claim 5
Dependent Claim
48 words
Ink jet recording sheet according to claim 1, wherein said wet strength additive is at least one member selected from the group consisting of polyamide resin, epichlorhydrine-modified polyamide resin, ethoxy-modified polyamide resin, glyoxal, melamine-formaldehyde resin, modified melamine-formaldehyde resin, modified urea-formaldehyde resin, polyethylene imine, polyethylene imine-derivative and dialdehyde starch.
Claim 6
Dependent Claim
39 words
Ink jet recording sheet according to claim 1, wherein said water-soluble polymer is at least one member selected from the group consisting of oxidized starch, modified starch, polyvinyl alcohol, sodium alginate, carboxymethyl cellulose, a water-soluble cellulose derivative and casein.
Claim 7
Dependent Claim
27 words
Ink jet recording sheet according to claim 1, wherein said water-soluble polymer is coated in amount of 2-5 g/m 2 onto the surface of said base sheet.
Claim 8
Dependent Claim
29 words
Ink jet recording sheet according to claim 1, wherein said water-soluble polymer is coated onto the surface of said base sheet by using size press system or coater system.
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) | 1987-04-10 | 1987-10-10 | 1988-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-10 | 1991-10-10 | 1992-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-10 | 1995-10-10 | 1996-04-10 | $7700.00 | Window Closed / Lapsed |