Claims
- 1. In a method for electric discharge recording on the recording surface of an electric discharge recording material using a discharge recording stylus, the improvement which comprises interposing between the recording surface and the discharge recording stylus an electrically anisotropic non-recording layer which is unbreakable by electric discharge, comprises a resin matrix and a metal powder dispersed therein, and has a surface resistance of at least 10.sup.8 ohms and a volume resistance of not more than 10.sup.4 ohms-cm, whereby said electric discharge recording is carried out through said non-recording layer.
- 2. The method of claim 1 wherein the metal powder has an average particle diameter of 0.2 to 20 microns.
- 3. The method of claim 1 wherein the metal powder is in a microspherical, dendric or microlumpy form.
- 4. The method of claim 1 wherein the metal powder has a specific resistance of not more than 2.times.10.sup.-4 ohm-cm.
- 5. The method of claim 1 wherein the metal powder is a powder of a metal selected from the group consisting of copper, aluminum, tin, molybdenum, silver, iron, nickel, zinc and silver-coated copper.
- 6. The method of claim 1 wherein the metal powder is uniformly dispersed in the resin matrix in an amount of at least 20 parts by weight per 100 parts by weight of the resin.
- 7. The method of claim 1 wherein the metal powder is uniformly dispersed in the resin matrix in an amount of 30 to 2,000 parts by weight per 100 parts by weight of the resin.
- 8. The method of claim 1 wherein the metal-containing resin has a surface resistance of 10.sup.9 to 10.sup.14 ohms.
- 9. The method of claim 1 wherein the metal-containing resin has a volume resistance of 1 to 10.sup.4 ohms-cm.
- 10. The method of claim 1 wherein the non-recording layer has a thickness of 3 to 100 microns.
- 11. The method of claim 1 wherein the method of electric discharge recording is an electric discharge transfer recording method or an electric discharge breakdown recording method.
- 12. The method of claim 1 wherein the electric discharge recording is carried out while moving the discharge recording material and the non-recording layer in the same direction at different moving speeds.
- 13. The method of claim 12 wherein the moving speed of the discharge recording material is higher than that of the non-recording layer.
- 14. The method of claim 13 wherein the moving speed of the discharge recording material is not more than 1,000 times that of the non-recording layer.
- 15. The method of claim 1 wherein the electric discharge recording is carried out while moving the discharge recording material and the non-recording layer in different directions.
- 16. The method of claim 15 wherein the moving direction of the non-recording layer is at right angles to that of the discharge recording material.
Priority Claims (4)
Number |
Date |
Country |
Kind |
51/81513 |
Jul 1976 |
JPX |
|
51/81514 |
Jul 1976 |
JPX |
|
52/2658 |
Jan 1977 |
JPX |
|
51/26361 |
Mar 1977 |
JPX |
|
Parent Case Info
This application is a division of application Ser. No. 813,776, filed July 7, 1977, now U.S. Pat. No. 4,163,075.
US Referenced Citations (3)
Divisions (1)
|
Number |
Date |
Country |
Parent |
813776 |
Jul 1977 |
|