JPS6320348B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a charger for charging a photoreceptor of an electronic copying machine, for example.

Traditionally, most electrophotographic copying machines use chargers that use corona dischargers.
Corona dischargers are dangerous because they use high pressure, pollute the atmosphere and equipment due to ozone generation, and are expensive. On the other hand, charging methods using rollers and brushes, which have been tried variously for a long time, do not damage the photoreceptor mechanically or electrically, and there is no method that can be applied to photoreceptors that are used repeatedly over several thousand times. Ta.

In recent years, as a charging device that solves the above-mentioned drawbacks all at once, a contactor with a flexible electrical resistor provided on the base, an electrode with a moderate resistance value that comes into contact with this contactor, and a A charging device has been proposed which is characterized by having a means for applying an electric field, and charging an object by bringing the contactor into contact with the object to be charged. The charging device according to this proposal applies a DC voltage to an electrode placed on the back of a contact made of a brush-like material with a moderate electrical resistance, and attenuates the DC voltage.
This is a completed contact type charger by applying AC voltage. By using this charging device, very good results have been obtained in repeated charging over several thousand times.

Conventionally, there are two types of contact type chargers: one using velveteen and the other using cut fibers.
In the case of velveteen (fabric), the length of the hair is almost constant, so there is no problem with this, but it is not possible to increase the density of the hair much, which can lead to uneven charging. Ta. On the other hand, flocked hairs can be formed at a higher density than velveteen, but on the other hand, the hairs have uneven lengths, so there is a risk of uneven charging. Furthermore, when the hair is transplanted using a simple electrostatic method, the hair is not planted uniformly, which also causes uneven charging.

This invention was made in view of the above-mentioned circumstances, and its purpose is to obtain a high-quality charger that can uniformly perform electrostatic flocking on the hair body and that does not cause uneven charging. The purpose of this invention is to provide a method for manufacturing a charger that can be used.

The present invention will be described below based on an embodiment shown in the drawings. FIG. 1 shows a schematic configuration of an electrostatic flocking device, and 1 is a first electrode. This first electrode 1 has a predetermined electrical resistance, for example 10 ³ to 10 ¹²
It is made of conductive rubber with a thickness of 1 to 10 mm and has a resistance of Ω·cm. This first electrode 1 is connected to a DC power source 2, and a DC voltage of 40 KV is applied thereto. Furthermore, a conductive adhesive 3 is applied to the lower surface of the first electrode 1. This adhesive 3 is maintained at a viscosity of 500 CPS by mixing the first liquid and the second liquid. +
Carbon (Dataite SH-B manufactured by Fujikura Kasei Co., Ltd.) etc. is used, and the second liquid is epoxy ADR331 (manufactured by Asahi Dow Co., Ltd.): Polyamide L-15 (manufactured by Sanyo Chemical Co., Ltd.) =
A 1:1 mixture is used. According to experiments, when 2 parts of the first liquid and 1 part of the second liquid are mixed, the resistance value becomes 10 ⁶ Ωcm.
It has been confirmed that when a portion of the second liquid is mixed, the resistance value is maintained at 10 ⁴ Ω·cm. In addition, 4 is a 120 Hz that faces the surface where the adhesive 3 is applied and is 10 cm apart.
A conductive plate 6, which serves as a second electrode that is grounded, is connected to the upper surface of the diaphragm 5 of the speaker 4.
is provided. Furthermore, this conductive plate 6 and the first
A mesh 7 made of a conductive member and grounded is interposed between the electrode 1 and the electrode 1 . Therefore, an electric field of 4 KV/cm is formed between the first electrode 1 and the conductive plate 6.

Next, a method of transplanting hair using an electrostatic flocking device configured as in the case of Joju will be explained. first,
Cutting fiber that should be transplanted e.g. REC
-B (manufactured by Unitika), 6 d in thickness and 1.0 mm in length, is placed on the conductive plate 6, and when an AC signal (120 Hz) is applied to the speaker 4 and a DC voltage is applied to the first electrode 1, the diaphragm 5 vibrates, and the conductive plate 6 also vibrates due to the vibration. Therefore, the cut fibers a on the conductive plate 6 fly due to static electricity, pass through the mesh 7, and are vertically adhered to the adhesive 3 coated surface of the first electrode 1. That is, when the cut fiber a passes through the mesh 7, it is aligned vertically and then flies to the surface where the adhesive 3 is applied, so that one end of the cut fiber a sinks into the softened adhesive 3 and becomes vertical. will be transplanted.

In this case, since the mesh 7 and the conductive plate 6 are at the same potential, the distance from the mesh 7 to the conductive plate 6 is as follows.
Kulonka has no effect on cutlet fiber a,
During this time, the cut fiber a is physically caused to fly due to vibration. This eliminates irregularities in the cut fibers a and allows for uniform flocking. In other words, the mesh 7 functions as a kind of grid.

The lengths of the cut fibers a, which are thus implanted on the electrode 1 via the adhesive 3, are uneven, but after the adhesive 3 has solidified, the electric razor 8 is used as shown in FIG. By cutting the cut fiber a to a predetermined length, the length dimensions can be made uniform. As is well known, the electric shaving force 8 is composed of a fixed blade and a movable blade that rotates or reciprocates inside the fixed blade.
The flocked cut fiber a can be cut without bending or laying down.

The cut fibers a, which are flocked to the electrode 1 via the adhesive 3 as described above, have a predetermined electrical resistance, and by fixing the electrode 1 to the charger base 9 as shown in FIG. , it can be used as a charger for a photoreceptor in an electronic copying machine.

As explained above, this invention cuts the cut fibers that are electrostatically flocked to the electrodes with adhesive to a predetermined length. This has the effect that it can be easily cut into pieces and a high quality charger can be obtained.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention.
The figure is a schematic configuration diagram of the electrostatic flocking device, FIG. 2 is a sectional view showing a cutting state, and FIG. 3 is a sectional view of a charger. DESCRIPTION OF SYMBOLS 1... First electrode, 2... Power source, 3... Adhesive, 4... Speaker (excitation means), 5... Vibration plate,
6... Conductive plate (second electrode), a... Cut fiber bar.

Claims (1)

[Claims] 1. A first electrode having a conductive adhesive layer and a second electrode connected to an excitation means are arranged facing each other with a mesh having the same potential as the second electrode interposed therebetween, and the second electrode is placed on the second electrode. A cut fiber is placed on the cut fiber, and a potential difference is applied between the first electrode and the second electrode, and the cut fiber on the second electrode is caused to fly while being vibrated by the vibration excitation means to bond the first electrode. A method for producing a charger, which comprises flocking hair to a drug layer.