JPS61291152A - Electrostatic recording apparatus - Google Patents

Abstract

PURPOSE:To facilitate the manufacturing of the electrodes of a high-density printed electrode plate and to enable the lowering in the capacity between electrodes, by superposing two printed electrode plates wherein electrode leading end parts and wiring parts are collectively formed and using the cross-sections thereof as the terminal surfaces of recording electrodes and arranging electrodes in a zigzag pattern. CONSTITUTION:A printed electrode plate is constituted by forming electrode part patterns 32 and matrix wiring parts 33 to the front and back surfaces of a substrate 31 and providing protective cover coatings 34 to both outside surfaces t he substrate 31. As the material of the substrate 31 and the cover coatings 34, polyimide or a glass/epoxy resin for enhancing the hardness of each electrode is used. Copper or nickel is used in the electrode part patterns 32 and matrix wiring parts 33 to the front and back surfaces of a substrate 31 and providing protective cover coatings 34 to both outside surfaces of the substrate 31. As the material of the substrate 31 and the cover coatings 34, polyimide or a glass/epoxy resin for enhancing the hardness of each electrode is used. Copper or nickel is used in the electrode part patterns 32 and the matrix wiring parts 33 and an insulating resin is used as a filler material 35. Printed electrode plates 30a, 30b having the same constitution are superposed back to back and the pitch (p) between electrodes, the width (w) of each electrode and the thickness (h) of each electrode part pattern are made equal. These electrode part patterns are arranged in electrode arrangement in a zigzag pattern and superposed in constitution such that the pitches p' of the electrodes with adjacent electrodes become equal.

Description

[Detailed Description of the Invention] [Summary] Two printed electrode plates each having an electrode tip and a wiring part formed at the same time are
By stacking them together, using the cross section as the end surface of the recording electrode, and arranging the end surfaces in a staggered manner, the electrode density can be reduced compared to when using only one set of printed electrode plates, making it easier to manufacture high-density electrodes. Moreover, the capacitance between the electrode lines is reduced by increasing the pinch between the electrodes.

[Industrial application field]

The present invention relates to an electrostatic recording device, and more particularly, the present invention relates to an electrostatic recording device, in which a recording electrode and a magnetic toner developer are disposed via an insulating recording medium 3, and a recording electrode of a recording device forms a toner image on the insulating recording medium at the same time as an image signal is applied. Regarding the structure of

[Conventional technology]

FIG. 3 shows an external view of a conventional electrostatic recording device.

In the figure, the recording electrode 1 constitutes a multi-stylus in which electrode needles 2 consisting of a plurality of groups are arranged in a row.

An insulating recording medium 3 made of a dielectric film is brought into contact with the electrode needle 2 of the recording electrode 1.

On the other hand, a magnetic toner developer 6 having a rotating magnetic roller 5 is disposed inside a fixed cylindrical sleeve 4 at a position facing the electrode needle 2 of the recording electrode 1 with the insulating recording medium 3 interposed therebetween. Further, on the cylindrical sleeve 4, a counter electrode 7 divided into a plurality of segments is arranged in close contact with each other.

To perform recording, a magnetic I/N is transferred to the outer circumference of the cylindrical sleeve 4, a voltage corresponding to the image signal is applied to the electrode needle 2, and a voltage of opposite polarity is applied to the counter electrode 7. By applying a magnetic toner to the insulating recording medium 3, a toner image is formed.

FIG. 4 is a diagram showing the principle of toner image formation, and in order to make it easier to understand the explanation of the operation of configuration 1 below, each figure is 1ffl, and the same parts are given the same reference numerals and their overlaps. yExplanation will be omitted.

FIG. 4 shows an enlarged view of how a toner image 19 is formed by adhering toner to the insulating recording medium 3 while a voltage is applied to the electrode needles 2.

When voltage pulses of opposite polarity are applied to the electrode needle 2 and the counter electrode 7 while the insulating recording medium 3 is moving, for example, in the direction of the arrow P shown in the figure, the gap between the electrode needle 2 and the insulating recording medium 3 is An aerial discharge occurs in the microgap, and a latent image charge 20 is formed on the surface of the insulating recording medium 3 on the electrode needle 2 side.

At the same time, charges of opposite polarity are injected into the toner at the tip of the magnetic brush] 8 carried onto the opposing electrode 7 of the selected segment, and are attracted to the Coulomb force of the latent image charge 20 to be applied to the insulating recording medium 31. A toner image 19 is formed. Incidentally, an uneven layer having a predetermined height is formed on the surface of the two examples of electrode needles of the insulating recording medium 3 in order to maintain the micro-gaps necessary for generating an aerial discharge.

FIG. 5 shows an overall configuration diagram of a conventional recording apparatus.

In the figure, the insulating recording medium 3 is mounted on rollers 8, 9, and 8 with a dielectric film J in a heddle shape. ]O to rotate at a constant speed.

The tip of the electrode needle 2 of the recording electrode 1 is placed in contact with the inside of the insulating recording medium 3. Further, a magnetic toner developer 6 having a counter electrode 7 on the surface of the cylindrical sleeve 4 is installed facing the recording electrode 1 .

After forming a toner image on the insulating recording medium 3 as explained with reference to FIGS. is conveyed in parallel to the insulating recording medium 3, and the I/toner image is transferred onto the recording paper X2 from the back side using the transfer roller 13.

Thereafter, the transferred image on the recording paper 12 is fixed to the recording paper 12 by the fixing device I4. On the other hand, the insulating recording medium 3 is further rotated, and a corona static eliminator 16 is placed on both sides of the insulating recording medium 3.
When alternating voltages with different phases are applied to the respective corona static eliminators at the portions where and 17 are arranged facing each other, the charge of the magnetic toner remaining on the insulating recording medium 3 is erased, and the insulating recording of the magnetic toner is The force of adhesion to the medium 3 is weakened.

Further, when the insulating recording medium 3 is rotated and generally transported to the recording section, the remaining magnetic toner is collected by the magnetic force of the magnetic roller 5 in the magnetic toner developing device 6.

As described above, the recording process is repeated to output an image, and since such a recording device performs the latent image forming process using the recording electrode and the developing process using the developing device at the same time, it is difficult to use an output device such as a facsimile. This has the advantage of simplifying the structure of the device, making it smaller and cheaper.

Further, since magnetic toner is used, untransferred toner can be collected in a developing device and reused without cleaning, so maintenance is easy and the cost of consumables is low.

On the other hand, the recording electrode 1 used in an electrostatic recording device is manufactured by a process of arranging multi-styli in a horizontal line, molding them with a resin such as epoxy, and manually connecting each group, so-called matrix connection.

Conventionally, multi-stylus electrodes have been used in the recording method, but these multi-stylus electrodes are connected manually and are difficult to mass-produce, making it impossible to expect a reduction in cost. Therefore, the overall cost of the recording device is 1~
Compared to this, the cost of recording electrodes accounts for a large proportion. Therefore, we attempted to reduce the cost by using a printed electrode plate that forms the recording part and the pattern connection part all at once.

FIG. 6 shows an external view of a conventional printed electrode plate.

In the figure, reference numeral 21 is a printed electrode plate, in which an electrode portion 23 and a through-hole land portion 24 are arranged in an electrode area 22, and the electrode portion 23 is pattern-connected to a through-hole land portion 24 for each group. There is.

FIG. 7 is an enlarged view of part A shown in FIG.
a) is a front view, and FIG. 7 (bl is a back view). In both figures, an electrode pattern is formed on the surface of the printed electrode plate 21.The electrodes of the electrode section 23 are connected in groups. For this purpose, a through-hole land 24a is provided as shown in the figure, and a 7 trisock connection land 2 on the back side is provided.
4h and m1ffi respectively. On the back side, when X electrodes are in one group, a++h++ ・
・・V+ and aZ+b2+ ・・' y2 and aXlb
Connect in the order of X+...VX.

In such a shape, if the electrode part 23 has a resolution of, for example, 240 dots/inch, the pattern area of the part where the through-pole land 24a is installed is smaller than the tip of the electrode due to the area of the land itself. Also, the pattern density is as high as 30 to 40 mm/inch.

[Problem that the invention seeks to solve]

At present, the technical level for temporary printing of such high-density wiring is 120 to 240 dots/inch, and the yield rate is not that good. This poses a problem in reducing product costs or in manufacturing high-density electrodes of 240 dots/inch or more.

Furthermore, in printed boards with such high density wiring,
The line capacitance between electrodes increases as the density of the electrode pattern increases. This line capacitance poses a problem in the driving time of the electrode driver.

When electrodes are driven by a single-stage switching element, the cycle is 30 ps for recording at a recording medium speed of 5 cm/s and a resolution of 240 dots/inch, but if a load capacitance of 500 pp is connected to the output of the switching element at this recording speed, There is a problem when the output waveform is rounded and does not reach the set recording voltage (7).

The present invention was created in view of the drawbacks of the prior art as described in -.
The purpose of the present invention is to provide a recording electrode that facilitates the electrode manufacturing of high-density purine 1 to electrode plates and allows for a reduction in interelectrode capacitance.

[Means to solve the problem]

In the electrostatic recording device of the present invention, as shown in FIGS. 3, 1, and 2, a recording electrode 1 and a magnetic toner developer 6 are disposed facing each other with an insulating recording medium 3 in between, and the magnetic toner developer A counter electrode 7 divided into a plurality of segments 1 is disposed opposite the recording electrode 1 on a cylindrical sleeve 4 enclosing the magnetic roller 5 of the device 6, and the recording electrode 1 and the counter electrode 7
By selectively applying a voltage between the insulating recording medium 3 and
In a recording device that forms a henna image 19, a recording electrode 1
an electrode tip and two sheets of pudding 1 to electrode plate 3 in which the electrode tip is connected in 7 trisodes for each of the plurality of segments.
0a, 30b, and the printed electrode plates 30a, 30h
The electrode tip portions are arranged in a staggered arrangement.

[Effect]

In the present invention, two Pudding I/electrode plates 30a and 30b, each of which has an electrode tip and a wiring part formed at the same time, are superimposed, the cross section of which is used as the end face of the recording electrode, and the electrode arrangement is staggered, so that only one This makes it easier to manufacture high-density electrodes by making the electrode density more relaxed than in the case of printed electrode plates, and also reduces the capacitance between electrode lines by increasing the pitch between the electrodes.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a cross-sectional diagram of one printed electrode plate of the present invention. In the figure, the structure of the printed electrode is such that an electrode part pattern 32 and a 71 helix wiring part 33 are formed on the front and back sides of a substrate 31, respectively, and a cover coat 34 is provided on both outer sides for protection.

The substrate 31 and the cover coat 34 are made of, for example, polyimide F or glass epoxy resin in order to increase the hardness of the electrodes. Copper (Co), nickel (N1), etc. are used for the electrode part pattern 32.7 and the triturus wiring part 33. The filler 35 is made of insulating +AJ resin.

The dimensions shown are the electrode pattern thickness, W is the electrode width, and p
indicates the electrode pitch.

FIG. 2 shows a cross-sectional view of an embodiment of the invention. In the figure,
The printed electrode plates 3Qa and 30b have the same configuration and are stacked back to back, and the pitch between the electrodes, the electrode width W, and the thickness h of the electrode portion are also made the same.

Here, to show an example in which the density of electrode needles is designed to be 400 dots/inch, the interelectrode pitch p is 1 for each electrode.
25tItLl, the electrode width w75, and the electrode part pattern thickness h5011m.

This electrode part pattern is arranged in a staggered manner as shown in FIG. 2, and the electrodes are superimposed so that the pitch p' between each electrode and the adjacent electrode is equal.

At this time, the electrode pin and pin 2 pins are 62.5 no Irfl (
(equivalent to 400 dots/inch). The density of the electrode needle is 3
When designing to 00F width/inch, the pitch p between each electrode may be 166.7 degrees.

〔Effect of the invention〕

As explained in detail above, according to the electrostatic recording device of the present invention, the manufacturing method and structure of the electrode part are very simple, and the electrode density can be increased or the line capacitance can be easily reduced. This has the effect of enabling high-quality image output.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of a printed electrode plate of the present invention, Fig. 2 is an embodiment of the present invention, Fig. 3 is an external view of a conventional electrostatic recording device, and Fig. 4 is a diagram of the principle of toner image formation in a conventional example. , Fig. 5 is an overall configuration diagram of a conventional example, Fig. 6 is an external view of a conventional printed electrode plate, and Fig. 7 is a diagram of a conventional printed electrode plate.
An enlarged view of part A of the figure is shown. In the figure, 1 is a recording electrode, 3 is an insulating recording medium, 4 is a cylindrical sleeve, 5 is a magnetic roller, 6 is a magnetic toner developer, 7 is a counter electrode, and 30a and 30b are printed electrode plates, respectively. sii Akira nbuso>)-tpig, 71 Ike4b@1.
CD Figure 1 / $ Departure B ribs and vagina 2nd figure 'L 4 rows of 4 rows of 4 pieces' Figure 5
Figure 4 8'(L#cqpu')>he&Pitq? 14! F
Figure 6

Claims (1)

[Claims] A recording electrode (1) and a magnetic toner developing device (6) are arranged opposite to each other with an insulating recording medium (3) interposed therebetween, and a magnetic roller (5) of the magnetic toner developing device (6) A counter electrode (7) divided into a plurality of segments is arranged on the cylindrical sleeve (4) to face the recording electrode (1), and a counter electrode (7) is arranged between the recording electrode (1) and the counter electrode (7). In a recording device that forms a toner image on the insulating recording medium (3) by applying a voltage to the recording electrode (1), the recording electrode (1) is connected to the tip of the electrode in a matrix for each of the plurality of segments. An electrostatic recording device comprising two printed electrode plates (30a, 30b), the electrode tips of the printed electrode plates (30a, 30b) being stacked in a staggered arrangement.