JPS61274959A - Thermal developing recording apparatus - Google Patents

Abstract

PURPOSE:To obtain a stable developed image, by forming the developed image by heat energy. CONSTITUTION:The electrode needle 7 corresponding to a recording dot is driven by a driven by a drive circuit 9 and allowed to pierce through a resistance layer 1 in the thickness direction thereof to flow a recording current I through a conductive layer 2 and a return electrode 8 and the resistance layer 1 in the vicinity of the electrode needle 7 is allowed to generate heat. This heat is conducted to the part 17 in the vicinity of the electrode needle 7 of toner 1 through the conductive layer 2 to melt the toner of said part 17 under heating. The supply of the current to the electrode needle 7 is stopped to cool the resistance layer 1 having generated heat and the toner 11 at the part 17 is fixed to a heat generating film 6. The heat generating film 6 is continuously or intermittently fed to the direction shown by an arrow and a magnetic brush 10 is also rotated in connection with the feed of the heat generating film 6 and unmelted toner is recovered. Only the thermally melted toner 17 is left on the heat generating film 6 in a closely adhered state to form a stable image.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a non-impact recording type thermal development recording device using powder ink (hereinafter referred to as toner).

<Prior art> Electrostatic recording devices have been widely known as recording devices that use toner, but in general, electrostatic recording devices, due to the principle of construction of the device, require: - A high-voltage power source for charging. do.

- Development is based on Coulomb force between the drum and toner, so development stability is poor.

- Recording quality deteriorates due to fogging, edge effects, etc.

There were problems such as.

OBJECT OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and provides stable development by creating development using thermal energy, without fogging or edge effects, and using a high-voltage power supply. The purpose of the present invention is to provide a stable recording device that does not require

<Example> Hereinafter, an example of the thermal development recording apparatus according to the present invention will be described in detail.

FIG. 1 is used in an embodiment of the thermal development recording apparatus according to the present invention. Showing a cross-sectional view of a heat-generating film for creating a developed film, a resistive layer consisting of carbon black and synthetic resin 1 is shown.
and a conductive layer 2 made of vapor-deposited aluminum coated thereon. FIG. 2 shows a cross-sectional view of another example of the heat generating film, in which a resistive layer 3. A conductive layer such as evaporated aluminum coated thereon4. It consists of a base material 5 made of polyimide or the like coated thereon to provide mechanical strength.

FIG. 8 is an overall configuration diagram of an embodiment of the thermal development recording apparatus according to the present invention, and in the same figure, it is shown in FIG.
(However, the one shown in FIG. 2 may also be used.) A plurality of electrode needles 7 for developing the image are in contact with a part of the resistance layer I side of the heat generating film 6 comprising the resistance layer 1 and the conductive layer 2, and the electrode needles 7 on the same side The return electrode 8 is in contact with the other part. A magnetic brush 10 made of a multipolar permanent magnet is arranged on the opposite side of the electrode needle 7 with the heating film 6 interposed therebetween. and pigments or dyes such as carbon black. A thermofusible toner If made of a thermofusible substance such as carnauba wax and iron powder is magnetically produced.
10 surface, and a part of the heat-melting toner 1 is pressed against the heat-generating film 6 by the magnetic brush IO. Further, the magnetic brush 10 is constantly supplied with toner 11° from the toner cartridge 13.

When creating a developed image, the electrode needle 7 corresponding to the recording dot is driven by the drive circuit 9 as shown in the partial configuration diagram of FIG.
The electrode needle 7 penetrates the resistive layer 1 in the thickness direction to form the conductive layer 2. A recording current I is passed through the return electrode 8 to cause the resistance layer l near the electrode needle 7 to generate heat.

This heat generation is conducted to the portion 17 of the toner 11 near the electrode needle through the conductive layer 1, and thermally melts the toner in the portion I7. When the electricity supply to the electrode needle 7 is stopped, the heat-generated resistance layer I is cooled down, and a portion I7 of the toner II is fixed to the heat-generating film 6.

The heat-generating film 6 is fed continuously or intermittently in the direction of the arrow, and the magnetic brush 10 also rotates in conjunction with the feeding of the heat-generating film 6. Unmelted toner is collected, and only the heat-fused toner 17 is in close contact with the heat-generating film 6. The remainder forms a stable developed image. 14 is a blower brush for removing collected leaked toner and preventing fogging.

The heat-generating film 6 that has been developed with the heat-fusible toner 17 in this way is sent to a fixing section composed of a fixing roller 15 that has a built-in heating element and a paper feed platen 18. The heat-fused toner 17 is thermally transferred onto the recording paper 6 by pressure contact and heating, thereby obtaining a predetermined record.

Here, the heat generating film 6 is in the shape of an endless ribbon and is used repeatedly, and after the thermal transfer to the recording paper is completed, it may be cleaned with a cleaning brush, a knife edge, etc. as in the case of electrostatic recording. Further, as long as the toner is heat-fusible, it may be either a ``-component toner'' or a 6-component toner in which a mixture of toner and iron powder is used in electrostatic recording.

FIG. 5 shows another embodiment of the thermal development recording device according to the present invention, in which a magnetic brush 20 is arranged on the same side as the electrode needles 19 to increase the pressing force of the toner 22 to the heat-generating film 21. 23 to the heat-generating film 2I to improve recording stability.

FIG. 6 shows still another embodiment of the thermal development recording apparatus according to the present invention. As shown in FIG. 7, the heating drum 24 is composed of a conductive layer 38 made of stainless steel or the like with low thermal conductivity and a high heat insulating effect, and a resistance layer 34 made of nichrome vapor deposition or the like. is electrically connected to the conductive layer 33 to constitute a return electrode. In FIG. 6, facing the heating drum 24, a latent image forming surface of four colors, yellow, magenta, cyan, and black, is arranged for color recording. Now, if the heating drum 24 is rotated and the heating surface generated by the recording current applied to the resistance layer 34 by the electrode needles 25 is successively thrust into the toner layer 27 held by the magnetic brush 26 provided on the back surface of the electrode needles 25, the above-mentioned It is possible to melt and fix the toner 27 by storing heat generated by electricity, and to thermally fuse the developer corresponding to the recording dots to the drum surface 628
29 is a toner cartridge, and 29 is a proa brush for preventing fogging.

The surface of the heat-generating drum 24 to which the developer of each color is thermally fused in this way reaches the fixing section, where it is heated by the heating roller 31 that presses against the recording paper 30, and the color image is thermally transferred to the recording paper 30. 35 is a cleaning brush for cleaning the drum surface after transfer.

FIG. 8 shows still another embodiment of the heat development recording device according to the present invention. 2 A light-to-heat conversion drum 3 made of transparent heat-resistant glass has a black body layer 36 formed by metal vapor deposition on the surface.
Toner 4 held by magnetic brush 40 on surface 6'
Laser light 38 from a laser light source 37 is selectively irradiated onto the pressure contact portion of 1 from the shutter 89, passing through the glass layer and absorbing the black body layer 3θl, thereby causing the black body layer 36 to generate heat and toner. After being melted and fixed to form a developed image, thermal transfer is performed on a recording paper 42 by a heating roller 48, thereby recording.

In the above embodiments, constant pressure crimping may be used.

Effects of the present invention> According to the thermal records described in detail above.

1) The heat-melting toner is melted and fixed to the developer holding member by an energy conversion means such as electric-thermal or light-thermal to form a latent image, so the stability of development is excellent.

2) Does not require a high voltage power source like electrostatic recording.

3) Since there is no restriction on the electrical conductivity of the toner, there is a large degree of freedom in selecting toner constituent materials.

4) When the development is performed by electric-thermal conversion, the development formation mechanism can be easily constructed.

5) Since the developer is fixed to the developer holding member and one strength is obtained, it is easy to remove unnecessary toner that causes fog.

6) By placing the magnetic brush facing the toner,
Stronger development can be obtained.

7) In the case of color recording, thermal transfer can be performed after forming multiple color developments on the same development holding member, so two-color misalignment is less likely to occur.

It has the following advantages.

3, 5, 6, 6 and 8 show the overall configuration of the thermal development recording apparatus, and FIGS. 4 and 7 show partial configuration diagrams.

In the figure, 6: heat generating film, 7: electrode needle, 8: return electrode,
9: Drive circuit.

1O: magnetic brush, 11: heat-melting toner.

13: Ink cartridge, 14 Ni blower brush.

15: Fixing roller, 16: Recording paper.

17: Heat-adhesive toner.

182 paper feed platen.

Agent: Patent attorney Aihiko Fuku (and 2 others) Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. Energy converting means such as electricity-thermal or light-thermal, and means for melting and fixing the thermofusible toner to the developer holding member using the thermal energy obtained by the energy converting means;
A thermal development recording apparatus comprising means for transferring the developed image formed on the development holding member to recording paper. 2. The thermal development according to claim 1, wherein the means for melting and fixing the heat-fusible toner to the developer holding member includes a permanent magnet that presses the toner to the developer holding member. Recording device.