Patent US4293595A successfully refreshed from Google Patents.
US4293595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous process for making a conductive medium for electrostatic printing
Assignee: International Paper Co
•
Filing: 1979-03-28
•
Granted: 1981-10-06
•
Expires: 1999-03-28
Abstract
Abstract An improved aqueous process for making a conductive medium for electrostatic printing and the conductive medium therefrom, the process comprising applying to one side of a high density basestock a partially insolubilizable aqueous conductive latex precoat, preferably ranging in coat weight from 0.5 to 1.0 pounds per 3000 ft 2 , the insolubiliztion of the conductive latex resulting from a partial insolubilization of the major conductive component of the latex; applying to the other side of the basestock a first aqueous low-resistance conductive precoat preferably having a coat weight of about 2 pounds per 3000 ft 2 ; partially insolubilizing the conductive latex precoat; applying to the partially insolubilized latex precoat an aqueous dielectric coating preferably ranging in coat weight from 4.5 to 6.5 pounds per 3000 ft 2 ; and applying to the first low-resistance precoat a second aqueous low-resistance conductive coating preferably ranging in coat weight from 0.5 to 1.5 pounds per 3000 ft 2 . The conductive paper comprises on the one side of a high density basestock a partially insolubilized aqueous conductive latex layer, preferably ranging in weight from 0.5 to 1.0 pounds per 3000 ft 2 , the insolubilization of the conductive latex resulting from a partial insolubilization of the major conductive component of the latex and on top thereof a dielectric layer preferably ranging in weight from 4.5 to 6.5 pounds per 3000 ft 2 and comprises on the other side of the basestock at least two aqueous conductive layers, preferably having a total weight of from about 2.5 to 3.5 pounds per 3000 ft 2 .
Inventors
- 👤 William H. Kreiling
- 👤 Edward S. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:45
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/105; G03G5/02; G03G5/0202; G03G5/0205; G03G5/0208; G03G5/0217; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T442/00; Y10T442/20; Y10T442/2041; Y10T442/2049; Y10T442/2057; Y10T442/2066; Y10T442/2418; Y10T442/2459
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
137 words
An improved process for making a conductive medium for electrostatic printing comprising applying to a first side of a high density basestock a partially insolubilizable aqueous conductive latex precoat comprising an interpolymer of a butadienebased polymer latex and a αβ-olefinically unsaturated carboxylic acid monomer, the insolubilization of the conductive latex resulting from partial insolubilization of the major conductive component of the latex; applying to the other side of the basestock a first aqueous low-resistance coating; partially insolubilzing the conductive latex precoat, the extent of said partial insolubilization being controlled so as to provide to said first side of the basestock a surface resistivity of about 1×10 10 ohm/square at 50% relative humidity; applying to the partially insolubilized conductive latex precoat an aqueous dielectric coating; and applying to the first aqueous low-resistance coating a second aqueous low-resistance coating.
Claim 2
Dependent Claim
137 words
An improved process for making a conductive medium for electrostatic printing comprising applying to a first side of a high density basestock a partially insolubilizable aqueous conductive latex precoat comprising an interpolymer of a butadienebased polymer latex and a αβ-olefinically unsaturated carboxylic acid monomer, the insolubilization of the conductive latex resulting from partial insolubilization of the major conductive component of the latex; applying to the other side of the basestock a first aqueous low-resistance coating; partially insolubilzing the conductive latex precoat, the extent of said partial insolubilization being controlled so as to provide to said first side of the basestock a surface resistivity of about 1×10 10 ohm/square at 50% relative humidity; applying to the partially insolubilized conductive latex precoat an aqueous dielectric coating; and applying to the first aqueous low-resistance coating a second aqueous low-resistance coating.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein the αβ-olefinically unsaturated carboxylic acid monomer is selected from the group consisting of acrylic acid, methacrylic acid, αchloroacrylic acid, sorbic acid, cinnamic acid, and maleic acid.
Claim 4
Dependent Claim
34 words
The process of claim 1 wherein the partial insolubilization of the aqueous conductive latex is effected by an amine cross-linking agent selected from the group consisting of urea formaldehyde, melamine formaldehyde and hexamethoxymethyl melamine.
Claim 5
Dependent Claim
33 words
The process of claim 1 wherein the dielectric coating comprises a resin binder and a pigment selected from the group consisting of zinc oxide, titanium oxide, cadmium sulfate, barium sulfate and mixtures thereof.
Claim 6
Dependent Claim
13 words
The process of claim 4 wherein the dielectric coating also includes diatomaceous earth.
Claim 7
Dependent Claim
28 words
The process of claim 4 wherein the resin binder is selected from the group consisting of butadiene-styrene copolymers with acrylic acid, alkali-sensitive butadiene-styrene, styrene-acrylate copolymers and vinyl acetate.
Claim 8
Dependent Claim
26 words
The process of claim 1 wherein each of the low-resistance coatings is selected separately from the group consisting of salt/starch mixtures, protein/salt mixtures, and quaternary amines.
Claim 9
Dependent Claim
29 words
The process of claim 6 wherein the low-resistance coating adjacent the other side of the basestock is a salt/starch mixture and the other low-resistance coating is a quaternary amine.
Claim 10
Dependent Claim
57 words
The process of claim 1 wherein the partially insolubilizable aqueous conductive latex precoat ranges in coat weight from about 0.3 to 5.0 pounds/3000 square feet; the dielectric coating ranges in coat weight from about 2.0 to 10.0 pounds/square feet; and the low-resistance coatings have a total coat weight of from about 1.0 to 10.0 pounds/3000 square feet.
Claim 11
Dependent Claim
45 words
The process of claim 9 wherein the low-resistance coating adjacent the other side of the basestock ranges in coat weight from about 0.5 to 5.0 pounds/3000 square feet and the other low-resistance coating ranges in coat weight from about 0.5 to 5.0 pounds/3000 square feet.
Claim 12
Dependent Claim
56 words
The process of claim 1 wherein the partially insolubilized aqueous conductive latex precoat ranges in coat weight from about 0.5 to 2.5 pounds/3000 square feet; the dielectric coating ranges in coat weight from about 4.5 to 6.5 pounds/square feet and the low-resistance coatings have a total weight of from about 2.5 to 3.5 pounds/3000 square feet.
Claim 13
Dependent Claim
45 words
The process of claim 11 wherein the low-resistance coating adjacent the other side of the basestock ranges in coat weight from about 0.5 to 2.5 pounds/3000 square feet and the other low-resistance coating ranges in coat weight from about 0.5 to 2.5 pounds/3000 square feet.
Claim 14
Dependent Claim
26 words
The process of claim 1 wherein the basestock is selected from the group consisting of metal, metallic foil, paper, non-woven fabrics, wood, plastic film and cloth.
Claim 15
Dependent Claim
10 words
The process of claim 1 wherein the basestock is paper.
References Cited (Backward Citations)
US3784401A
Cited
US3708289A
Cited
US3672988A
Cited
US4081584A
Cited
US3900319A
Cited
US3880793A
Cited
US3898185A
Cited
US4120720A
Cited
US4107114A
Cited
US4148639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |