JPS62234990A - Current supply transfer recording method - Google Patents

Abstract

PURPOSE:To prevent running cost from becoming markedly high, by forming a resistance layer and an ink layer to separate sheets and superposing both sheets at the time of used and pressing an electrode needle to both sheets from the resistance layer side to apply voltage thereto to performed recording. CONSTITUTION:The two kinds of sheets respectively having a resistance layer 1 and an ink layer 4 are superposed and a voltage pulse is applied to an electrode needle 6 and a return electrode 7 to heat a part of the resistance layer 1 by Joule heat. A part of the ink layer 4 on a support layer 3 is heated, melted or sublimed by said heat to perform transfer to recording paper 5. Therefore, unlinke the case of the thermal transfer recording by a usual thermal head, the lowering of image quality or life due to the accumulation of heat is not generated at all and stable image quality is obtained at a high speed and the sheet comprising the resistance layer can be repeatedly used many times and, therefore, an extremely economical recording method is obtained.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to an electrical transfer recording method.

Conventional technology> Conventionally known electrical thermal transfer recording methods include:
A recording sheet consisting of a resistive layer, a conductive layer, an ink layer, and, if necessary, a support layer (U.S. Pat.
No. 97 and No. 41,103, 0≦6), or a recording sheet consisting of a resistive layer, a support layer, and an ink layer (Japanese Patent Application Laid-open No. Sho-Otsu O-7/293). There is a method for recording by pressing an electrode needle against the layer side and applying a voltage.

Compared to thermal transfer methods using normal thermal heads, these methods have extremely high recording speeds because there is no heat accumulation in the heads, and because the heads themselves are simple, they are inexpensive and have a long lifespan. It has useful characteristics and has attracted attention in many fields such as machines, facsimiles, computer terminals, and recorders.

However, compared to thermal transfer methods using normal thermal heads, these methods have major drawbacks such as ■ The recording sheet is extremely expensive, resulting in significantly higher running costs. It's limited.

<Problems to be Solved by the Invention> The present inventors have conducted extensive research on a recording method that has the characteristics of electrical transfer recording and has running costs equivalent to thermal transfer recording using a normal thermal head. Ta.

As a result, a method was adopted in which the resistive layer was heated by electricity and the ink layer was thermally transferred to the recording paper to obtain a record, and the resistive layer and the ink layer were made into separate sheets. The present inventors have discovered that the above-mentioned object can be achieved by using such a recording method, and have arrived at the present invention.

The features of the present invention are: i! Since it has the characteristics of i-electrotransfer and the resistance layer and ink layer are separate sheets, it is possible to repeatedly use the sheet consisting of resistance 1, and therefore the sheet consisting of the ink layer. It is now possible to use only those for replacement, and the running cost is equivalent to that of conventional thermal transfer recording.

The current transfer recording method of the present invention will be explained below with reference to the drawings.

Figure -/ is a diagram showing an overview of the recording method and recording sheet of the present invention.

In the figure, / is a resistance layer, which is made of a resin having a thickness of about 3 to 30 μm and containing a conductivity imparting agent such as carbon black or metal powder. λ is made of 24 conductive layers, such as aluminum! 3 is a support layer, which is made of a film of polyester, polyimide, capacitor paper, etc. and has a thickness of about 3 to 30 μm. is the ink layer) and contains color or black pigments or dyes at the melting point! A heat-melting transferable ink mixed with a wax or resin of θ˜/, 2<7″C is also a heat-melting transferable ink containing a sublimable dye.

By stacking two sheets (such as the resistance layer and the ink layer) together and applying a voltage pulse to the electrode needle 6, the return path iii, and the pole 2, a part of the resistance layer is heated by Joule heat. . By heating and melting or sublimating a part of the ink layer on the support layer, the ink layer is transferred to the recording paper.

FIGS. 1A and 1B are diagrams illustrating an overview of the recording method and recording sheet of the present invention when no conductive layer is used as the recording sheet. Numbers in the figure are the same as in figure -/.

This is a method in which a voltage pulse is applied to a pair of electrode needles in close proximity to each other without providing a conductive layer, and the resistance layer between the electrode needles is heated by Joule heat.
Transfer and recording to the recording paper is performed in exactly the same manner as in the case of .

<Effect of the invention> In this way, the resistance layer and the ink layer are made into separate sheets,
Unlike thermal transfer recording using a normal thermal head, by using the method of using both sheets stacked together, there is no deterioration in image quality or life expectancy due to heat accumulation, and stable image quality can be obtained at high speed. It can be said that this is an extremely economical recording method because the sheet made of this material can be used repeatedly.

<Example> The present invention will be explained in more detail with reference to Examples below.
The present invention is not limited to the following examples unless they go beyond the scope of the invention.

Example Ketjen black (manufactured by Japan Easy Co., Ltd.) 9 g, polycarbonate resin (manufactured by Maupei Co., Ltd., Mθrlon) 10 I
A mixture of I and dichloromethane λθ01, λO0
The mixture was placed in a 3θOCC mayonnaise bottle together with -1154 glass peas from No. 1, and dispersed in a paint shaker (manufactured by Red Devil) for 2 hours.

The above dispersion was coated on a polyester film with a thickness of 72 μm using a wire-by-coating method, so that the dry thickness/-2
The hemorrhage was stopped to obtain resistance islands.

After performing aluminum ablation of 1000% on this resistance layer, sheet A was obtained by removing from a polyester film.

On the other hand, carbon black (manufactured by Mitsubishi Chemical Industries, MA//
)/θi, paraffin wax (/¥!°F)azi,
Synthetic wax (manufactured by Mitsubishi Chemical Corporation, Guyacarna-30)
) 41ji and the mixture with 2 dragon Δ glass beads/θθI
At the same time, the mixture was stirred and dispersed at 7.20° C. for 2 hours using a JOOCC stainless steel sand grind mill to obtain an ink.

The above ink is applied onto a polyester film with a thickness of μm! Sheet B was prepared by hot-melt coating at 7.2θ° C. so that the thickness of the sheet was 7.2 μm.

Sheets A and B thus obtained were stacked together and printed on a commercially available electrical transfer recording printer (manufactured by IBM, Q).
When a printing test was carried out using a 67JO printer, extremely clear images were obtained, and it was found that the resistance layer sheet B could be used repeatedly and used in the form of an endless sheet.

[Brief explanation of drawings]

Figures / and - are schematic diagrams of recording sheets used in the recording method of the present invention. In the figures, / is a resistive layer, = is a conductive layer, 3 is a support layer, Hiroshi is an ink layer, ! is the recording paper, g is the electrode needle, 7 is the return electrode, ? represents a voltage pulse. Applicant: Mitsubishi Chemical Industries, Ltd. Agent: Patent attorney - Others/names

Claims (1)

[Claims] (1) In this method, the resistive layer is heated by electricity and the ink layer is thermally transferred to the recording paper to obtain a record.The resistive layer and the ink layer are formed on separate sheets, and when used, the two sheets are overlapped, and the resistive layer is A recording method characterized by pressing an electrode needle against the side and recording by applying a voltage.