US3652271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectrostatic recording member
Assignee: AB Dick Co
•
Filing: 1970-04-20
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Granted: 1972-03-28
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Expires: 1990-04-20
Abstract
Abstract A photoelectrostatic copy sheet is prepared by using a paper base sheet having a roughness in the range of from 100 to 250 Sheffield units. Bonded to the rough surfaced paper is a photoconductive layer comprising zinc oxide and in another embodiment sub-millimicron sized particles of hydrophobic silica dispersed in a resin binder. The layer conforms to the rough fiber textured surface of the base sheet to provide a finished recording surface having a roughness in the range of from 70 to 250 Sheffield units and a gloss (75*, Gardner) not in excess of 20 percent. This sheet has the appearance, feel and handle of an uncoated piece of paper.
Inventors
- 👤 Dennis M Bornarth
- 👤 Frank Schneidinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:27
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G5/02; G03G5/04; G03G5/05; G03G5/0503; G03G5/0507
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
38 words
The recording member as defined in claim 1 wherein said layer additionally includes sub-millimicron size particles of a hydrophobic silica, said silica being present in an amount not exceeding about 5 percent by weight of the zinc oxide.
Claim 2
Dependent Claim
17 words
a barrier coating applied to said base support providing a solvent hold-out in excess of 60 millimeters;
Claim 3
Dependent Claim
17 words
a barrier coating applied to said base support providing a solvent holdout in excess of 60 mm;
Claim 4
Dependent Claim
17 words
a barrier coating applied to said base support providing a solvent holdout in excess of 60 mm;
Claim 5
Dependent Claim
12 words
said base support providing a solvent hold-out in excess of 60 millimeters;
Claim 6
Dependent Claim
73 words
a photoconductive layer covering and bonded to said base support comprising an organic solvent laid coating of zinc oxide dispersed in an insulating resin binder having the following physical characteristics: a. roughness (Sheffield) 70-150 b. gloss (75*, Gardner) below about 20% said recording member having a basis weight in the range of from 15 to 25 lbs. per (17 inches X 22 inches - 500) and a caliper of 3.0 to 4.5 mils.
Claim 7
Dependent Claim
73 words
a photoconductive layer covering and bonded to said base support comprising an organic solvent laid coating of zinc oxide dispersed in an insulating resin binder having the following physical characteristics: (a) roughness (Sheffield 125-175 (b) gloss (75*, Gardner) below about 7% said recording member having a basis weight in the range of from 15 to 25 lbs. per (17 inches X 22 inches - 500) and a caliper of 3.0 to 4.5 mils.
Claim 8
Dependent Claim
97 words
a photoconductive layer covering and bonded to said base support comprising an organic laid coating of finely divided photoconductive zinc oxide and sub-millimicron sized hydrophobic silica particles dispersed in an insulating resin binder containing from 0.1 percent to 10 percent by weight of a silicone resin, and having the following physical characteristics: a. roughness (Sheffield) about 100 b. gloss (75*, Gardner) below about 7 percent said recording member having a basis weight in the range of from 15 to 25 pounds per (17 inches X 22 inches - 500) and a caliper of 3.0 to 4.5 mils.
Claim 9
Dependent Claim
54 words
The recording member as defined in claim 2 wherein said resin binder is a mixture of at least two resins, one of said resins having vinyl acetate as the major monomeric component and the other resin being a silicone resin, said mixture comprising no more than 10 percent by weight of the silicone resin.
Claim 10
Dependent Claim
96 words
a photoconductive layer covering and bonded to said base support comprising an organic solvent laid coating comprising a resin binder having a finely divided photoconductive zinc oxide and sub-millimicron sized hydrophobic silica particles dispersed therein, said silica particles being present in an amount not exceeding about 5 percent by weight of the zinc oxide, and having the following physical characteristics: a. roughness (Sheffield) 100-250 b. gloss (75*, Gardner) below about 10 percent said recording member having a basis weight in the range of from 15 to 25 pounds per (17 inches by 22 inches - 500).
Claim 11
Dependent Claim
18 words
The recording member as defined in claim 1 wherein said resin binder includes a styrenated acrylic copolymer resin.
Claim 12
Dependent Claim
10 words
A photoelectrostatic recording member having improved visual readability properties comprising:
Claim 13
Dependent Claim
23 words
The recording member as defined in claim 5 wherein the layer has a thickness in the range of from 0.1 to 0.5 mil.
Claim 14
Dependent Claim
19 words
The recording member as defined in claim 5 wherein the particle size of the silica is about 0.20 millimicrons.
Claim 15
Dependent Claim
57 words
The recording member as defined in claim 5 wherein said paper base is treated with a solvent barrier precoat to render said support surface resistant to the penetration of organic solvents, said precoat being selected from the group consisting of polyvinyl alcohol, starch, casein, animal glue, carboxymethyl cellulose, methyl cellulose, styrene-butadiene latex, acrylic latex, polytetraflouroethylene, and align.
Claim 16
Dependent Claim
46 words
The recording member as defined in claim 5 wherein said resin binder is selected from the group consisting of multipolymers containing vinyl acetate as the major monomeric component, polyvinYl acetate resin, polyester resin, copolymers of vinyl chloride-vinyl acetate, phenoxy resin, acrylic resin, and copolymers of styrene-butadiene.
Claim 17
Dependent Claim
10 words
A photoelectrostatic recording member having improved visual readability properties comprising:
Claim 18
Dependent Claim
25 words
The recording member as defined in claim 10 wherein the remainder of said resin binder is a resin having polyvinyl acetate as the major component.
Claim 19
Dependent Claim
10 words
A photoelectrostatic recording member having improved visual readability properties comprising:
Claim 20
Dependent Claim
18 words
The recording member as defined in claim 11 wherein said resin binder includes a styrenated acrylic copolymer resin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |