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Electric recording system and electric heat recording sheet
| Details |
Inventors: Kusakawa, Hideaki; Takahashi, Kenzo; Tomura, Koichi; Ohnishi, Masaru; Nakajima, Kumiko;
Assignee: Mitsubishi Denki Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Miller, Jr.; George H.
Assistant Examiner:
Attorney, Agent or Firm: Oblon, Fisher, Spivak, McClelland & Maier
An electric recording system is a novel recording system using an electric heat recording sheet comprising an electric conductive layer and an electric resistant layer, and heating the electric resistant layer by feeding a signal current to the recording sheet by contacting an electrode needle with the recording sheet and recording symbols or figures on the recording medium (e.g., commercial thermo-sensitive paper) through the electric conductive layer. In the other embodiment of the electric heat recording sheet, an electric resistant layer is formed on one surface of an electric conductive layer and an ink layer is formed on the rear surface of the electric conductive layer whereby heat is transferred from the electric resistant layer to print shape image by printing a part of the ink layer on the recording medium, such as a regular paper. In the improved embodiment of the electric heat recording sheet, an electric resistant layer is formed on one surface of the electric conductive layer and a dielectric layer of a polymer film is formed on the rear surface of the electric conductive layer whereby the electric heat recording sheet having excellent recording characteristics and durability is prepared. |
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DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS An electric heat recording sheet (10) having the structure shown in FIG.
1 is prepared.
The reference numeral (1) designates a conductive layer such as metal foil; (2) designates an electric resistant layer which has a resistance being higher than that of the conductive layer for more than one order and is film formability and the electric resistant layer (2) can be a coating of an electric conductive paint or a semiconductor deposited layer.
FIG.
2 shows one embodiment of the recording system using the electric heat recording sheet (10) of FIG.
1.
The reference numeral (1) designates an electric conductive layer; (2) designates an electric resistant layer; (11) designates an electrode needle for recording; (12) designates a paired electrode which is earthed; (13) designates a commercial thermo-sensitive recording paper and (14) designates a recording signal generator.
The transferring of heat by the recording system is performed as follows.
A DC voltage of 2 to 50 V is applied to the electrode needle (11) for recording.
When the resistance of the electric resistant layer (2) is made of a resistor having higher than 10.
sup.
2 .
OMEGA.
cm, arc is discharged between the electrode needle (11) and the electric resistant layer (2) to burn the electric resistant layer (2).
When the electric resistant layer (2) is made of a resistor having lower than 10.
degree.
.
OMEGA.
cm, the electric resistant layer (2) is heated by applying only about 5 V.
In these cases, the heat is caused by the arc discharge as the current passes between the electrode needle (11) and the electric conductive layer (1) and the heat is transferred through the electric conductive layer (1) to record the signals on the heat sensitive recording paper (13).
The first embodiment will be further illustrated by certain examples.
EXAMPLE 1 in a ball mill, 500 g of acrylic resin paint having a solid content of 40% and 20 g of carbon black (Diablack SH manufactured by Mitsubishi Chemical Ind
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