US4778711A
Expired / Lapsed
US
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Paper for receiving toner images in electrophotography
Assignee: New Oji Paper Co Ltd
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Filing: 1987-02-25
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Granted: 1988-10-18
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Expires: 2007-02-25
Abstract
Abstract An electrophotographic image transfer paper for a copier including a fixing operation, comprises a sheet of raw paper, and a receiving layer on the paper for reducing blistering of the sheet during fixing of an image on the sheet, the receiving layer including a coating on at least one side of the sheet, having a center-line-average surface roughness not more than 2.0 micrometer and an air permeability less than or equal to 4,000 seconds.
Inventors
- 👤 Hiroyoshi Hosomura
- 👤 Katsumi Harada
- 👤 Hiroshige Yamauchi
- 👤 Hitoshi Kuramoto
- 👤 Masao Ota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:18
CPC Classifications
G; G03; G03G; G03G7/00; G03G7/0006; D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/58; D21H25/00; D21H25/08; D21H25/12; D21H25/14; D21H11/00; D21H11/02; D21H11/04; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28; D21H17/62; D21H17/63; D21H17/66; D21H17/67; D21H17/68; D21H21/00; D21H21/14; D21H21/28; D21H21/30; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24934; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31971; Y10T428/31989
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
99 words
An electrophotographic image transfer paper for a copier including a fixing operation, comprising: a sheet of raw paper; and a receiving layer on the paper for reducing blistering of the sheet during fixing of an image on the sheet, the receiving layer including a coating on at least one side of the sheet, said coating comprising pigments and adhesives, wherein the pigment to adhesive ratio, the pigment average particle size, and the coating weight are capable of providing a center-line average surface roughness not more than 2.0 micrometers and an air permeability less than or equal to 4,000 seconds.
Claim 2
Dependent Claim
99 words
An electrophotographic image transfer paper for a copier including a fixing operation, comprising: a sheet of raw paper; and a receiving layer on the paper for reducing blistering of the sheet during fixing of an image on the sheet, the receiving layer including a coating on at least one side of the sheet, said coating comprising pigments and adhesives, wherein the pigment to adhesive ratio, the pigment average particle size, and the coating weight are capable of providing a center-line average surface roughness not more than 2.0 micrometers and an air permeability less than or equal to 4,000 seconds.
Claim 3
Dependent Claim
23 words
A paper according to claim 1, wherein said coating has a coating weight ranging from 5 to 30 g/m 2 per one side.
Claim 4
Dependent Claim
25 words
A paper according to claim 2, wherein the ratio of the pigment to adhesive in the coating is within the range of 95:5 to 60:40.
Claim 5
Dependent Claim
19 words
A paper according to claim 2, wherein the pigment has an average particle size of 1.5 micrometer or less.
Claim 6
Dependent Claim
33 words
A paper according to claim 1, wherein said coating has a surface electrical resistivity of at least 8×10 8 ohms measured at a temperature of 20° C. and a relative humidity of 85%.
Claim 7
Dependent Claim
31 words
A paper according to claim 1, wherein the standard deviation of the coefficient of static friction between adjacent sheets of paper in a stack is less than or equal to 0.05.
Claim 8
Dependent Claim
20 words
A paper according to claim 6, wherein the coated layer includes a lubricant in an amount from 0.1% to 5%.
Claim 9
Dependent Claim
21 words
A paper according to claim 6, wherein the coated layer includes a coarse-grained pigment in an amount from 1% to 10%.
Claim 10
Dependent Claim
32 words
The paper of claim 5, wherein the coating has a surface electrical resistivity of at least 1×10 9 ohms measured at a temperature of 20° C. and a relative humidity of 85%.
Claim 11
Dependent Claim
28 words
The paper of claim 6, wherein the standard deviation of the coefficient of static friction between adjacent sheets in a stack is less than or equal to 0.02.
Claim 12
Dependent Claim
17 words
The paper of claim 1, wherein the coating has an air permeability of at least 600 seconds.
Claim 13
Dependent Claim
18 words
The paper of claim 2, wherein the pigment has an average particle size of 1.0 micrometer or less.
Claim 14
Dependent Claim
23 words
The paper of claim 2, wherein said ratio of pigment to adhesive in said coating is within the range of 95:5 to 70:30.
Claim 15
Dependent Claim
16 words
The paper of claim 13, wherein said center-line-average surface roughness is not more than 1.5 micrometers.
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) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |