US4622262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording materials of improved lubricity for use in electroerosion printing
Assignee: International Business Machines Corp
•
Filing: 1986-02-14
•
Granted: 1986-11-11
•
Expires: 2006-02-14
Abstract
Abstract Electroerosion recording materials are provided with a surface lubricant film of lubricating conductive material in a polymeric binder. The lubricating conductive agent reduces stylus scratching of the conductive layer during electroerosion printing, improves contrast, provides a beneficial coating on the writing electrode or stylus and improves the handling and writing characteristics of the recording material. The lubricating conductive agent/polymer films are especially useful where the substrate of the recording material is light transmissive and, after the electroerosion process, the resulting product is suitable for direct-negative applications.
Inventors
- 👤 Mitchell S. Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:21
CPC Classifications
G; G03; G03F; G03F1/00; G03F1/68; B; B41; B41M; B41M5/00; B41M5/24; B41M5/245; B41N; B41N3/00; B41N3/03; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/269
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
113 words
An electroerosion recording medium suitable for electroerosion writing of a pattern therein by electrical pulses through a multi-stylus recording head, said pulses having a short duration and having a magnitude less than about 100 volts, including in combination a support layer, a thin conductive layer capable of being removed in selected areas thereof by said electroerosion writing when said styli contact said thin conductive layer, and a lubricating overlayer on the stylus-contacting side of said thin conductive layer, said overlayer being less than 1000 angstroms in thickness and being comprised of solid laminar graphite particles dispersed in a binder wherein said graphite particles are dispersed noncontinuously in a lateral direction of said overlayer.
Claim 2
Dependent Claim
113 words
An electroerosion recording medium suitable for electroerosion writing of a pattern therein by electrical pulses through a multi-stylus recording head, said pulses having a short duration and having a magnitude less than about 100 volts, including in combination a support layer, a thin conductive layer capable of being removed in selected areas thereof by said electroerosion writing when said styli contact said thin conductive layer, and a lubricating overlayer on the stylus-contacting side of said thin conductive layer, said overlayer being less than 1000 angstroms in thickness and being comprised of solid laminar graphite particles dispersed in a binder wherein said graphite particles are dispersed noncontinuously in a lateral direction of said overlayer.
Claim 3
Dependent Claim
22 words
The recording medium of claim 1, where said overlayer has a density in the order of about 5 micrograms per square centimeter.
Claim 4
Dependent Claim
19 words
The recording medium of claim 1, where the amount of graphite in said overlayer is about 70-80%, by weight.
Claim 5
Dependent Claim
23 words
The recording layer of claim 1, where the amount of graphite in said overlayer is in the range of about 50-80%, by weight.
Claim 6
Dependent Claim
29 words
The recording medium of claim 1, where said overlayer has a density in the order of about 5 micrograms per square centimeter, and contains about 50-80% graphite, by weight.
Claim 7
Dependent Claim
141 words
An electroerosion recording medium suitable for electroerosion writing of a pattern therein by electrical pulses through a multi-stylus recording head, said pulses having a short duration and having a magnitude less than about 100 volts, including in combination: a support layer, a thin conductive layer capable of being removed in selected areas thereof by said electroerosion writing when said styli contact said thin conductive layer, and a lubricating overlayer on the stylus - contacting side of said thin conductive layer, said overlayer having a density of less than 20 micrograms per square centimeter and a thickness and conductivity such that said thin conductive layer is removed by electrical arcs produced by said electrical pulses, said overlayer being comprised of solid laminar graphite particles dispersed in a binder wherein said graphite particles are dispersed noncontinuously in a lateral direction of said overlayer.
Claim 8
Dependent Claim
141 words
An electroerosion recording medium suitable for electroerosion writing of a pattern therein by electrical pulses through a multi-stylus recording head, said pulses having a short duration and having a magnitude less than about 100 volts, including in combination: a support layer, a thin conductive layer capable of being removed in selected areas thereof by said electroerosion writing when said styli contact said thin conductive layer, and a lubricating overlayer on the stylus - contacting side of said thin conductive layer, said overlayer having a density of less than 20 micrograms per square centimeter and a thickness and conductivity such that said thin conductive layer is removed by electrical arcs produced by said electrical pulses, said overlayer being comprised of solid laminar graphite particles dispersed in a binder wherein said graphite particles are dispersed noncontinuously in a lateral direction of said overlayer.
References Cited (Backward Citations)
US3411948A
Cited
DE1496152A1
Cited
US3514325A
Cited
GB1244177A
Cited
JPS5016653A
Cited
US4086853A
Cited
DE2434105A1
Cited
US4248950A
Cited
JPS5213746A
Cited
FR2333406A1
Cited
JPS5438A
Cited
GB1545726A
Cited
US4439485A
Cited
US4384012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-10 | 1990-05-12 | 1990-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-10 | 1994-05-12 | 1994-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-10 | 1998-05-12 | 1998-11-11 | $7700.00 | Window Closed / Lapsed |