JPS62297864A - Image recorder - Google Patents

Abstract

PURPOSE:To obtain the simple and highly reliable constitution of a recorder by unitedly arranging toner feeding and removing means in an image recorder for recording an image by a recording electrode and toner on a specific position. CONSTITUTION:A hopper 4 for storing conductive magnetic toner 5 is arranged on the side where an electrode 2 arranged obliquely from the vertical direction of a developing member 9 forms an acute angle with the member 9. While being regulated at the quantity to be carried by a toner regulating means 4a and sucked by a strong permanent magnet 10, the toner 5 is carried on the surfaces of sleeves 7, 8 and after arriving at the tip of the electrode, forms a toner chain arriving at the outside of the member 9 to contribute to image recording. Also, the excess toner is recovered to a hopper 4 by the rotation of a magnet roll 6. Since the feeding to such hopper 4 and removal are executed at one part, the device is simplified and the reliability is increased.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention uses conductive magnetic toner to directly form an image in an area where a recording electrode and a conductive developing member face each other. The present invention relates to an image distribution device formed on a conductive recording member.

[Conventional technology]

Using 4-electromagnetic toner, recording electrode and conductive toner ('J3
A toner chain of conductive magnetic toner is formed using a magnetic field in the area where the material faces the recording material, and a toner chain is formed with conductive magnetic toner to correspond to the image signal between the recording electrode and the conductive developing member, which are electrically connected by this toner chain. Artist-recording devices are known in which a voltage is applied to inject a charge into a portion of the toner chain that is in contact with a conductive developer member, thereby depositing toner on the developer member corresponding to the image. .

Such image recording apparatuses are excellent in that they can record images at low voltage and at high speed.

However, on the other hand, the image formed by adhesion of toner on the developing member: 1 still contains a considerable amount of unnecessary toner, which becomes a stain on the background of the image.

Therefore, it has been considered to remove unnecessary toner other than strongly adhered toner by injecting charge onto the developing member using magnetic force. Such technology is known, for example, from Japanese Unexamined Patent Publication No. 5
No. 9-3462.

[Problem that the invention seeks to solve]

Conventionally known means for removing unnecessary toner other than those to which charges are injected by applying a voltage are provided with a toner supply means and a toner removal means for removing unnecessary toner, respectively, and the overall structure is is complex and reliability remains an issue.

An object of the present invention is to provide an extremely compact image recording device with a simplified overall configuration.

[Means for solving problems]

The above object is an image recording device that includes a recording electrode, a conductive developing member whose surface is an insulating layer, and a permanent magnet that is placed between the developing member and facing the recording electrode. A toner storage hopper that is installed at an angle with respect to the direction and has a single toner regulating means that integrates toner supply and removal means on the acute angle side, and a toner supply and removal means that consists of a magnetic roll with a sleeve cleaned. This is achieved by

[Effect]

The toner supply/removal means uses a magnet roll to create a steady flow of toner from a hopper equipped with one toner regulating means, and the recording electrode device is placed in this flow, so that the recording electrode tip is exposed to the magnetic field of the permanent magnet. Therefore, a certain amount of toner exists regardless of the presence or absence of an image and regardless of its density. In addition, unnecessary toner that becomes background dirt is selectively removed by the magnetic attraction of the magnetic roll of the toner supply and removal means directly from the developing member, and is collected directly into the hopper, resulting in a simple structure that produces good images. can get.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of the image recording apparatus of the present invention, and FIG. 2 is a detailed diagram of the recording section of FIG. 1.

A plurality of recording electrodes 2 arranged in a row are provided on a ceramic substrate 1, which are made by a thick film process. The ceramic substrate 1 has a tapered shape at the end on the recording section side, and has a laminated structure of magnetic plates 3 made of a magnetically permeable material for concentrating magnetic flux. The toner supply and removal means consists of a hopper 4 equipped with one toner regulating means 4at, a magnet roll 6 and a sleeve 7 which are alternately magnetized with N and Sj poles, and a sleeve 8 with a protruding channel 2. 4 stores conductive magnetic toner 5. The developing member 9 is mostly composed of a conductive member 9a, has a hollow shape, has a mirror-finished surface, and is coated with an insulating layer 9b having a thickness of about 2 to 100 μm. The material of the developing member 9 is, for example, aluminum, in which case the surface is made of alumite, hard alumite,
Alternatively, the insulating layer 9b is formed by subjecting porous hard aluminum oxide to a surface treatment such as impregnating it with a tetrafluoride resin (Mitsubishi Metals trademark: Taflam treatment). The electrode 2 is installed obliquely with respect to the vertical direction of the developing member 9, and a toner supply/removal means is provided on the acute angle side. A permanent magnet 10 is arranged below the electrode inside the developing member 9. A conductive rubber roller 11 is pressed below the developing member 9 through a recording sheet 12'. A pulse drive circuit 13 is connected to the recording electrode 2 and the conductive member 9a of the developing member 9, and a transfer voltage application circuit for transferring toner from the developing member 9 to the recording paper 19 is connected to the conductive rubber roller 18. ing.

Next, the operation of one embodiment of the image recording apparatus of the present invention described above will be explained using FIGS. 1 and 2.

As shown in FIG. 2, the toner 5 stored in the hopper 4 is conveyed in the direction of arrow A over the rotation of the magnet roll 6 (over the sleeve 7.8) and reaches the tip of the electrode.

The amount of toner to be conveyed is determined by toner regulating means 4a provided in the hopper.

At the tip of the electrode, a toner chain connecting the electrode 2 and the outer surface of the developing member 9 in a chain is created by the magnetic field generated by the permanent magnet 10, which is stronger than the magnetic field generated by the magnet roll 6 at the tip of the sleeve 8. The surplus toner 5 is transferred to the sleeve 8,
7 and stored in the hopper 4. When the pulse drive circuit 13 applies a voltage to the plurality of recording electrodes 2 according to the image signal, charges are injected into the toner forming the toner chain. At the same time, charges of a different polarity from the charges injected into the toner 5 are induced at the boundary between the conductive member 9a and the insulating layer 9b of the developing member 9, and these two charges are attracted to each other by Coulomb force. As the developing member 9 further rotates in the direction of arrow B, the toner chain is cut and a developed image is formed with the charged toner. At this time, a part of the toner is conveyed on the developing member regardless of the image due to external force such as frictional force with the developing member 9, and becomes a stain on the recorded image. This unnecessary non-image toner is removed from the magnetic roll 6.
It can be selectively attracted as shown by arrow C by the magnetic attraction force of , and by the rotation of the magnet roll 6, it can be conveyed as shown by the arrow, stored in the hopper 4, and removed from the phenomenon member 9. The high-quality recorded image obtained on the developing member is transferred to the recording paper 12 by mechanical contact and the electrostatic field created by the conductive rubber row 211, and then transferred to the recording paper 12 by a fixing device shown in the figure.
The image is fixed on the recording paper 12 as a permanent image.

According to the non-embodiment, the same magnet roll is used for toner supply and toner removal, so that the toner supply and removal device can be miniaturized.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, the toner supply and removal means may be provided with a plurality of magnetic coils for supply and removal in one hopper.

〔Effect of the invention〕

According to the present invention, since the recording electrode is installed at an angle with respect to the vertical direction of the developing member, and the toner supply and removal means is provided on the acute angle side, there is no need to provide two separate means for supplying and removing toner. In addition, the present invention is equipped with a toner regulating means that can supply toner to the tip of the electrode without requiring a conveyance path for toner collection, and can remove unnecessary toner on the developing member that becomes a stain on the background of the recorded image. This can be carried out using the same means as above, and the apparatus is simple and has the effect of obtaining highly reliable and high-quality images.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the configuration of an embodiment of the present invention, and FIG. 2 is an enlarged view of the recording section of FIG. 1.

Claims (1)

[Claims] 1. A recording electrode, a conductive developing member whose surface facing the recording electrode is an insulating layer, and a recording area formed between the recording electrode and the conductive developing member. a toner supply means for supplying conductive magnetic toner to the conductive magnetic toner; and a magnetic field applying means for forming a toner chain of the conductive magnetic toner between the recording electrode in the recording area and the surface of the insulating layer of the conductive developing member. , a recording drive section that applies a voltage corresponding to a recorded image to an electrically conductive circuit formed between the first electrode, the toner chain, and the conductive developing member; and the recording area of the conductive developing member. In the image recording apparatus, the recording electrode is arranged to be inclined toward the moving side of the recording area with respect to the vertical direction of the conductive developing member, and the recording electrode and the conductive recording member are The side where the angle formed is an acute angle,
The image recording apparatus further comprises a toner supply and removal means for supplying the toner and collecting toner other than that used for recording in a region close to the recording electrode and the surface of the conductive developing member. .