Patent US5662995A successfully refreshed from Google Patents.
US5662995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer paper for electrophotography and process for producing the same
Assignee: Fujifilm Business Innovation Corp
•
Filing: 1995-07-03
•
Granted: 1997-09-02
•
Expires: 2015-07-03
Abstract
Abstract Transfer paper for electrophotography of the present invention includes base paper; and a coating layer provided on at least one side of the base paper. The coating layer includes a pigment and a binder, has a solids content in the range of 2 to 10 g/m 2 , and has void-free areas containing no voids having a circle-equivalent diameter of equal to or more than 1 μm and void area containing voids whose circle-equivalent diameter is equal to or more than 1 μm. A proportion of void areas whose equivalent circle diameter is more than 20 μm is not more than 2%, and the average equivalent circle diameter of the void areas and that of the void-free areas as observed on the surface of the coating layer satisfy at least one of the following conditions: (1) the average equivalent circle diameter of the void areas and that of the void-free areas are each from 1.5 to 10 μm; (2) the average equivalent circle diameter of the void areas and that of the void-free areas are each 0.2 to 1.5 times the volume average particle size of the toner used for image formation; and (3) the average equivalent circle diameter of the void areas is from 1.0 to 10.0 μm and that of the void-free area is from 1.5 to 10 μm.
Inventors
- 👤 Kunio Sakurai
- 👤 Tsukasa Matsuda
- 👤 Kyoko Inoue
- 👤 Harumi Watanabe
- 👤 Masaru Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:27
CPC Classifications
G; G03; G03G; G03G7/00; G03G7/0006; G03G7/0013; D; D21; D21H; D21H19/00; D21H19/66; D21H19/70; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24934; Y10T428/249921; Y10T428/249953; Y10T428/25; Y10T428/27; Y10T428/273; Y10T428/277; Y10T428/31; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
223 words
Transfer paper for electrophotography comprising: base paper; and a coating layer provided on at least one side of said base paper, wherein said coating layer comprises a pigment and a binder, has a solid content in the range of 2 to 10 g/m 2 per side, and has first areas containing no voids having a equivalent circle diameter equal to or more than 1 μm and second areas containing voids having an equivalent circle diameter equal to or more than 1 μm; wherein a proportion of said second areas having equivalent circle diameter more than 20 μm is equal to or less than 2%, and the average equivalent circle diameter of said second areas and that of said first areas, as observed on the surface of said coating layer, satisfy at least one of the following conditions: (1) the average equivalent circle diameter of said second areas and that of said first areas are each from 1.5 to 10 μm; (2) the average equivalent circle diameter of said second areas and that of said first areas are each 0.2 to 1.5 times the volume average particle size of the toner used for image formation; and (3) the average equivalent circle diameter of said second areas is from 1.0 to 10.0 μm and that of said first areas is from 1.5 to 10 μm.
Claim 2
Dependent Claim
223 words
Transfer paper for electrophotography comprising: base paper; and a coating layer provided on at least one side of said base paper, wherein said coating layer comprises a pigment and a binder, has a solid content in the range of 2 to 10 g/m 2 per side, and has first areas containing no voids having a equivalent circle diameter equal to or more than 1 μm and second areas containing voids having an equivalent circle diameter equal to or more than 1 μm; wherein a proportion of said second areas having equivalent circle diameter more than 20 μm is equal to or less than 2%, and the average equivalent circle diameter of said second areas and that of said first areas, as observed on the surface of said coating layer, satisfy at least one of the following conditions: (1) the average equivalent circle diameter of said second areas and that of said first areas are each from 1.5 to 10 μm; (2) the average equivalent circle diameter of said second areas and that of said first areas are each 0.2 to 1.5 times the volume average particle size of the toner used for image formation; and (3) the average equivalent circle diameter of said second areas is from 1.0 to 10.0 μm and that of said first areas is from 1.5 to 10 μm.
Claim 3
Dependent Claim
25 words
Transfer paper for electrophotography as claimed in claim 1, wherein said second areas and said first areas alternate on the plane of the coating layer.
Claim 4
Dependent Claim
30 words
Transfer paper for electrophotography as claimed in claim 1, wherein said transfer paper has a surface resistivity of 1×10 9 to 5×10 11 Ω as measured according to JIS K6911.
Claim 5
Dependent Claim
23 words
Transfer paper for electrophotography as claimed in claim 1, wherein said base paper has a formation index equal to or more than 20.
Claim 6
Dependent Claim
26 words
Transfer paper for electrophotography as claimed in claim 4, wherein said base paper has an apparent density equal to or more than 0.8 g/cm 3 .
Claim 7
Dependent Claim
24 words
Transfer paper for electrophotography as claimed in claim 5, wherein said transfer paper has a water content of 3.5 to 6% as a product.
Claim 8
Dependent Claim
24 words
Transfer paper for electrophotography as claimed in claim 5, wherein said transfer paper has a surface resistivity of 1×10 9 to 5×10 11 Ω.
Claim 9
Dependent Claim
24 words
Transfer paper for electrophotography as claimed in claim 4, wherein said transfer paper has a water content of 3.5 to 6% as a product.
Claim 10
Dependent Claim
24 words
Transfer paper for electrophotography as claimed in claim 8, wherein said transfer paper has a surface resistivity of 1×10 9 to 5×10 11 Ω.
Claim 11
Dependent Claim
24 words
Transfer paper for electrophotography as claimed in claim 4, wherein said transfer paper has a surface resistivity of 1×10 9 to 5×10 11 Ω.
Claim 12
Dependent Claim
23 words
Transfer paper for electrophotography as claimed in claim 1, wherein the pigment has an average particle size of from 1.5 to 10 μm.
Claim 13
Dependent Claim
87 words
Transfer paper for electrophotography comprising: base paper; and a coating layer provided on at least one side of said base paper, wherein said coating layer comprises a pigment and a binder and has a solids content in the range of 2 to 10 g/m 2 per side, said coating layer having a 75° specular gloss of 1 to 15%; wherein said pigment has an average particle size of 1.5 to 10 μm, said coating layer has void areas having an average diameter of 1.0 to 10 μm.
Claim 14
Dependent Claim
87 words
Transfer paper for electrophotography comprising: base paper; and a coating layer provided on at least one side of said base paper, wherein said coating layer comprises a pigment and a binder and has a solids content in the range of 2 to 10 g/m 2 per side, said coating layer having a 75° specular gloss of 1 to 15%; wherein said pigment has an average particle size of 1.5 to 10 μm, said coating layer has void areas having an average diameter of 1.0 to 10 μm.
Claim 15
Dependent Claim
46 words
Transfer paper for electrophotography as claimed in claim 12, wherein a proportion of pigment particles having at least one of a sheet structure and a structure built up by tabular crystals is equal to or less than 70% by weight based on the total pigment particles.
Claim 16
Dependent Claim
40 words
Transfer paper for electrophotography as claimed in claim 13, wherein said average diameter of the voids in said void areas formed among the pigment particles is within a range of ±2 μm of said average particle size of said pigment.
Claim 17
Dependent Claim
24 words
Transfer paper for electrophotography as claimed in claim 13, wherein said transfer paper has a surface resistivity of 1×10 9 to 5×10 11 Ω.
Claim 18
Dependent Claim
40 words
Transfer paper for electrophotography as claimed in claim 12, wherein said average diameter of the voids in said void areas formed among the pigment particles is within a range of ±2 μm of said average particle size of said pigment.
Claim 19
Dependent Claim
24 words
Transfer paper for electrophotography as claimed in claim 16, wherein said transfer paper has a surface resistivity of 1×10 9 to 5×10 11 Ω.
Claim 20
Dependent Claim
24 words
Transfer paper for electrophotography as claimed in claim 12, wherein said transfer paper has a surface resistivity of 1×10 9 to 5×10 11 Ω.
References Cited (Backward Citations)
JPS62198876A
Cited
JPS62198877A
Cited
JPH03161760A
Cited
JPH03180599A
Cited
JPH03242654A
Cited
JPH03294600A
Cited
JPH04291351A
Cited
JPH0553363A
Cited
JPH05241366A
Cited
JPH0673699A
Cited
EP0621510A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-09-01 | 2001-03-03 | 2001-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-01 | 2005-03-03 | 2005-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-01 | 2009-03-03 | 2009-09-02 | $7700.00 | Window Closed / Lapsed |