JPH04212164A - Electrostatic recording material and communication path forming device to conducting layer for the material - Google Patents

Abstract

PURPOSE:To offer an electrostatic recording material whose full surface can be used for recording and simultaneously, which can obtain sufficient earthing by arranging a connecting means for earthing in the vicinity of a latent image writing position to the electrostatic recording material. CONSTITUTION:A conductive layer (c) and a dielectric layer (d) are laminated on an insulation base material (a), so that the conductive layer (c) is exposed on the end surface. The full rear surface of the insulation base material (a) is coated with a conductive coating material, and a conductive coating film 21 is provided. In this state, the shape of a roll is obtained, and then, the end surface of this rolllike part is coated with the conductive coating material 20. Thus, the conductive layer (c) and the conductive coating film 21 of the recording material rear surface are connected with the conductive coating material 20, as shown by the figure.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to an electrostatic recording material and a device for forming a conductive path to its conductive layer, which is employed in recording devices such as electrostatic recording type copying machines, facsimile machines, printers, etc. .

0002

[Prior Art] In a recording device that records an electrostatic latent image on a dielectric layer of an electrostatic recording material (hereinafter referred to as recording material) and visualizes the electrostatic latent image using a developing device, stable In order to obtain an image, it is necessary to use the conductive layer of the recording material as an electrode and maintain it at a predetermined potential. For this reason, as shown in FIG. 9, conventionally used recording paper has a dielectric layer b formed on a base material a, which is made entirely conductive by infiltrating a conductive agent from both sides. This conductive base material a is grounded. However, in this type of recording material, in order to make the base material a conductive, a conductive agent is permeated into the base material a, and the base material a is impregnated with a conductive agent.
Due to its thinness, it was transparent to light and was not a desirable recording material for purposes other than as a second original. In particular, in order to obtain full-color high-quality images, it is desirable that the recording material be white and glossy like photographic paper. In order to obtain opacity, gloss, whiteness, and smoothness, it is advantageous to use a synthetic resin film such as polyethylene terephthalate or synthetic paper as a base material, but it is necessary to lower the resistance of the film or synthetic paper itself. That is difficult. Also, on the other hand,
There is a demand for recording materials for high-precision recording devices that are based on synthetic resin films or the like that are less susceptible to environmental changes.

Therefore, as shown in FIG.
and the insulating base material a such as the above synthetic resin film,
A recording material provided with a conductive layer c has been proposed, and since it is not possible to directly ground the base material a, the following grounding method has been proposed. (2) An exposed portion of the conductive layer c is formed without providing the dielectric layer b for several mm from the end in the width direction, and the exposed portion is grounded. (2) A conductive agent made of a mixture of conductive particles such as carbon black or metal powder and resin is applied to the exposed portion to form a coated film portion, and the coated film portion is grounded. (2) The dielectric layer b is partially destroyed, and a conductive protrusion is inserted into the recording material from the destroyed part and grounded. ■ A small amount of conductive fine particles are mixed into the dielectric layer b and grounded from the surface of the dielectric layer b of the recording material.
Publication No.).

0004

[Problems to be Solved by the Invention] However, according to the configurations (1) to (3) above, there is a problem in that a portion that cannot be used for recording is created on the recording material. or,
According to the configuration (2) above, there is a problem that an electrostatic latent image may not be recorded in the area where the conductive fine particles are present, and the developing bias in the developing device may not work effectively. The present invention has been made in view of the problems of the prior art, and its purpose is to be able to form a good image on almost the entire surface of a recording material, and to make it possible to form a good image on almost the entire surface of a recording material, and to make it possible to form a good image on almost the entire surface of a recording material. An object of the present invention is to provide a recording material and a device for forming a conductive path to the conductive layer, which enables connection between a recording device and a conductive layer of the recording material that does not easily become a conductor.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the recording material of the present invention is produced by winding an electrostatic recording material formed in such a way that a conductive layer is exposed on the end surface into a roll shape. It is made by applying a conductive agent to the end face of the roll-shaped part. Further, the device for forming a conductive path to the conductive layer of the recording material of the present invention includes:
An electrostatic recording material formed such that a conductive layer is exposed on the end surface is rolled into a roll shape, and a conductive means connected to the conductive layer of the electrostatic recording material is provided on the end surface of the rolled portion. It is something. Furthermore, in order to achieve the above object, another recording material of the present invention is an electrostatic recording material formed such that a conductive layer is exposed on the end surface, and a conductive agent is applied to the end surface and the back surface. be.

[0006]

[Operation] In the recording material constructed as described above, the conductive layer of the recording material can be grounded to the recording device via the conductive agent applied to the end face of the roll-shaped portion. Further, the device for forming a conductive path to the conductive layer of the recording material configured as described above includes:
By connecting a conductive means to the conductive layer exposed on the end face of the roll-shaped portion, the conductive layer of the recording material can be grounded to the recording device.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 11 is a schematic diagram of an electrostatic recording type recording apparatus in which the recording material according to the present invention can be used. First, to explain the outline of this recording device, a recording material A wound into a roll is set on a feeding shaft 1 (hereinafter, a roll made of this recording material is referred to as a recording material roll 11), and the leading edge of the recording material A is It passes over the electrostatic recording head 2 and developing head 3 which are inactive, and is sandwiched between a drive roller 4 and a pinch roller 5. In this state, an image forming operation standby state is established. When the image forming operation is started, the drive roller 4 starts rotating, an electrostatic latent image is recorded on the recording material A by the electrostatic recording head 2, and this electrostatic latent image is developed on the developing head 3. Just before the leading edge of the developed image passes the cutter 6, the cutter 6 is driven to cut off the remaining part of the leading edge of the recording material A, and then immediately after the trailing edge of the developed image passes the cutter 6. Then, the rotation of the drive roller 4 is stopped and the cutter 6 is driven to cut the recording material A, and the sheet-like recording material A is discharged onto a paper discharge tray (not shown) while only the paper discharge roller pair 7 is rotated. .

In the present invention, the recording material A is a material in which a conductive layer c and a dielectric layer b are laminated on an insulating base material a, as shown in FIG. This is then rolled to form a roll. A first example of such a recording material roll 11 will be described using FIG. 2. In this embodiment, the conductive layer c of the recording material A is exposed on the end surface (hereinafter referred to as the roll end surface) 12 of the roll-shaped portion, and is used as the recording material A to be set in a recording apparatus. A) shows a state in which recording material A is wound into a roll and a portion is unrolled. By bringing an electrode from the recording device side (hereinafter referred to as an external electrode) into contact with this roll end surface 12, the conductive layer c of the recording material A is grounded to the recording device.

As such external electrodes, for example, those shown in FIGS. 1(a) to 1(c) can be used. In FIG. 1(a), a conductor such as metal, conductive rubber, carbon, etc. is pressed against the roll end surface 12 using an elastic metal body for connection. On the left side of the roll 11 in the drawing, an electrode is formed by a conductor 13 and an elastic body 14. On the right side of the roll 11 in the drawing, a roller 15 forms an electrode in order to reduce sliding friction. However, since the moving speed of the roll 11 differs in the radial direction, the side surface of the roller 15 should be brought into contact with the outer edge (circumference) of the roll end surface 12, or the shape of the roller 15 should be changed so that the radius becomes smaller toward the center. A conical shape is preferable in order to reduce slippage. In FIG. 1(b), a brush 16, which is an elastic conductor, is pressed against the roll end surface 12 to serve as an electrode. Since it is possible to follow minute irregularities on the roll end surface 12, good ground contact is possible even when the recording material A is winding misaligned. In FIG. 1(c), the conductor rotary plate 17 in contact with the roll end surface 12 is integrally constructed with the support shaft 18 of the roll 11 (parts that rotate together with the support shaft 18 are also considered to be part of the shaft). 18 to the conductive layer c. In this example, the conductor rotating plate 1
7 is brought into close contact with the roll end face 12 by means of an elastic body 14 and a conductor stopper 19, and is connected via a conductor rotary plate 17, a stopper 19, and a support shaft 18. Here, the pressing rotary plate 1
7', the spring 14, and the spring stopper 19' are made of conductors,
Connection may be made through these.

According to this embodiment, since the conductive material such as the brush 16 is brought into direct contact with the roll end surface 12, the conductive layer c of the recording material A and the conductive material come into contact at a plurality of points or lines, and locally Although there are some points where there is no contact, on average it is sufficiently possible to obtain conduction. Furthermore, since the external electrodes are brought into contact with the rolled portion of the recording material A, a relatively large lateral pressure (recording material A
(The conductive layer c exposed on the end surface of the recording material A is thin with a thickness of 1 to 10 μm and has a flat surface.) It is difficult to apply enough lateral pressure to the upper part of the recording material A to prevent it from buckling and to reliably electrically connect it to the external electrode.)

Next, a second embodiment of the recording material roll 11 is as follows.
This will be explained using FIG. 2(b). In this embodiment, as in the first embodiment, after being wound into a roll, a conductive agent 20 is applied to the entire or part of the end surface 12 of the roll, and the resulting material is used as a recording material A to be set in a recording device. It is something. Figure 2
(b) shows the application state of the conductive agent 20 on the roll end surface 12. The film layer made of the conductive agent 20 has a weak film forming strength and is easily sheared when unwound from the roll 11. If the permeability of the conductive agent 20, which depends on the viscosity and surface tension, is too strong, a large amount of the conductive agent 20 may enter between the wound recording materials A, causing unrecordable areas or stains. Therefore, it is desirable that the conductive agent 20 to be applied be selected in consideration of the above-mentioned characteristics, and that an agent that is the same color as the recording material A or transparent is selected. By bringing an external electrode from the recording device side into contact with the conductive agent 20 applied to the roll end surface 12, the conductive layer c of the recording material A is grounded to the recording device. Here, the conductive agent and the external electrode constitute a conductive means.

According to this embodiment, even if the roll end face 12
Even if the conductive material 20 is not completely flat due to winding misalignment, the conductive material 20 can connect each layer.

Next, a third embodiment of the recording material roll 11 is as follows.
This will be explained using FIGS. 3(a) and 3(b). In this embodiment, a metal plate or metal foil (hereinafter referred to as
A conductive plate (referred to as a conductive plate 30) is provided. FIG. 3A shows a state in which recording material A is wound into a roll, a conductive plate 30 is provided on the end surface 12 of the roll, and a portion of recording material A is unwound. Although FIG. 3B shows a case in which a conductive agent 20 is interposed between the roll end surface 12 and the conductive plate 30, it is possible to directly contact the conductive plate 30 with the roll end surface 12 without intervening such a conductive agent 20. You can let me. Further, the conductive plate 30 does not have to have a shape that completely covers the roll end face 12. In order to bring the conductive plate 30 into close contact with the roll end face 12 (in the case of the roll end face 12 on which a film of the conductive agent 20 is formed, the conductive plate 30 is attached to the roll end face 12 where a film of the conductive agent 20 is formed), the conductive plate 30 may be pressed against the roll end face 12; It may be bonded using an adhesive or a conductive agent having adhesive strength. By bringing an external electrode from the recording device into contact with the conductive plate 30 provided on the roll end surface 12, the recording material A
The conductive layer c of is grounded to the recording device. As such external electrodes, for example, those shown in FIGS. 1(a) to 1(c) above can be used.

According to this embodiment, the electrically conductive plate 30 provided on the end surface of the recording paper roll 11 allows reliable electrical connection to the external electrode on the recording apparatus side. In each of the above embodiments, the conductive agent 20 applied to the roll end surface 12
Alternatively, if the conductive plate 30 provided on the roll end face 12 is formed so as to extend from the roll end face 12 to the inner surface of the core (hollow part) of the roll 11, the roll 1
1, and can be connected to the recording device from this support shaft. In particular, when the metal foil is bonded to the roll end face 12 with a conductive adhesive and a portion of the metal foil is bonded to the support shaft, manufacturing is easy and electrical connection can be made at low cost. Further, in each of the above embodiments, the recording material A is wound into a roll without using a core member, but a hollow cylindrical or rod-shaped core member is used to record on the circumferential surface. Material A may be wound into a roll.

Next, using the hollow cylindrical core member 40,
A fourth embodiment in which the recording material A is wound around the circumferential surface to form a roll will be described with reference to FIGS. 4(a) and 4(b). In this embodiment, a conductive agent 20 is applied from the roll end face 12 to the end face 41 of the roll 11 core member 40 to make both end faces electrically conductive. 4(a) shows a state in which the recording material A is wound onto a hollow cylindrical core member 40 to form a roll, and is partially unwound, and FIG. A state in which the conductive agent 20 is applied to the end face 41 of the member is shown. FIG. 5 shows an example of an external electrode suitable for the transfer material of this embodiment. This is connected to the conductive agent 20 applied to the end face 41 of the core member. A conductive left stopper 42 is fixed on a support shaft (not shown) of a core member 40 provided in the recording apparatus. The core member 40 on which the recording material is wound into a roll is passed through the support shaft, and with its left end surface abutting against the left stopper 42, an electrode 43, which is a conductor, a metal spring 44, which is an elastic conductor, and a conductor are connected. A right stopper with which a certain metal flange 45 is integrated is attached to the support shaft. As a result, the left stopper 42 and the electrode 43 are connected to the conductive agent 2 on the end surface 41 of the core member.
0 film and connect the conductive layer c of the recording material A to the recording device.

Conductor 42 from roll end surface 12 of recording material A
, 43 can be pressed against each other to establish conduction, but this may cause problems such as buckling of the recording material A due to the thrust load or a large load when being unwound. In this regard, according to this embodiment, the roll end surface 12 and the core member end surface 41 are electrically connected to each other by the film of the conductive agent 20, and the conductors 42 and 43 are pressed against the core member end surface 41, so that the recording material A is subjected to no load. It is possible to connect electrically without causing any problems. In this embodiment, conduction is made from both the left and right ends of the core member 40, but conduction may be made from either one. Further, the core member 40 may be a rod-shaped member that is not hollow. FIG. 6 shows a modification of the mechanism for conducting electrically from the core member end face 41, in which the left stopper 42 is fixed to the support shaft 46, and the right stopper 47 is screwed onto the support shaft 46. Both stoppers 42 and 47 are disc-shaped and support the core member 40 at their peripheral edges. This peripheral area is
It contacts the inner surface and end surface of the core member, but is formed to escape to the outside so as not to contact the recording material A on the roll 11. In addition, when using a hollow cylindrical core member, the conductive agent 20 may be applied from the roll end surface 12 to the end surface and inner surface of the core member, thereby connecting the roll end surface 12 and the inner surface of the core member. good. When forming a conductive path through the core member itself, a more reliable electrical connection can be achieved if the core member itself is made of a conductor such as metal.

[0017] Next, a recording material that can form a good image on almost the entire surface of the recording material, and also enables connection between the conductive layer of the recording material and the recording device, in which the back surface of the recording surface is unlikely to become a conductor. Another example will be described.

In the above-mentioned recording material, the end face of the roll-shaped portion is grounded using a conductive means connected to the conductive layer. If the distance between the two points is large, the resistance of the conductive layer in the recording material portion extending between this distance also increases, ensuring sufficient grounding (the conductive layer in the portion facing the recording head 2 exhibits sufficient electrode function). It may become difficult to maintain a predetermined potential. Therefore, it is desirable to use a recording material that can be brought into contact with the ground near the recording head 2, preferably also in the area facing the recording head 2. In this embodiment, in order to enable such grounding, the conductive layer is exposed at the end of the recording material, so that the conductive layer can be brought into contact with the back surface of the recording material. A conductive paint, which is a conductive agent, is applied over the entire surface of the device, and the conductive layer exposed at the end is connected to the conductive paint portion on the back side.

FIG. 7 shows a schematic configuration diagram thereof. A conductive layer c and a dielectric layer b are laminated on an insulating base material a so that the conductive layer c is exposed at the end surface, and a conductive paint is applied to the entire back surface of the insulating base material a. A conductive paint film 21 is provided, and a conductive paint 20 is applied to the end face to connect with the conductive paint film 21. This insulating base material a has opacity, glossiness, whiteness,
It is desirable to use synthetic paper or synthetic resin film, which has good smoothness and is advantageous for high image quality. According to this, the conductive layer c of the recording material is connected to the conductive paint film 21 on the back surface of the recording material via the conductive paint 20 applied to the end surface of the recording material, and thereby, the back surface of the recording material is Can be grounded. Normally, when a recording material is cut, the conductive layer is exposed at the edges, so the recording material of this embodiment can be produced by applying a conductive paint to the edges of the recording material. However, in the general process of producing rolls of recording material, the recording material is wound while being cut, so if a load is applied to the edge of the recording material between cutting and winding, the recording material becomes more wrinkled. This may occur and make it difficult to wind up neatly. In this case, it is advantageous to produce the recording material roll as in the following example.

In this example, a conductive layer c is formed on an insulating base material a.
A laminated layer of dielectric layer b and dielectric layer b is formed so that the conductive layer c is exposed on the end surface, and a conductive paint film 21 is provided by applying conductive paint to the entire back surface of the insulating base material a, and then rolled. After forming the roll-shaped part, conductive paint 20 is applied to the end face of the roll-shaped part.
This connects the conductive layer c and the conductive paint film 21 on the back surface of the recording material with the conductive paint 20, as shown in FIG. 8(b). According to this, as shown in FIG. 8(a), when the recording paper is unwound (unwound) from the roll-shaped part, a part of the conductive paint 20 on the end face of the roll-shaped part is broken, and the conductive paint 20 is broken in parts. There is a possibility that the connection between the conductor layer c and the conductive paint film 21 will be lost, but the conductive paint 20 is not broken.
Since the connection goes around the area, sufficient grounding can be obtained.

[0021] When applying the conductive paint 20 to the end surface of the recording paper wound into a roll, if the viscosity of the conductive paint 20 is relatively low, capillary action between the recording materials will cause the conductive paint 20 to coat the end surface. This is undesirable because it penetrates into the recording surface from the outside, resulting in unrecordable areas, and also causes adhesion between the recording materials. Therefore, it is desirable to adjust the viscosity to an appropriate level. If the viscosity is appropriate, the amount of permeation can be minimized, and when it is unwound from the roll during use, the coating film made of the conductive paint 20 is broken according to the thickness of the recording material, and the cross section of the recording material is You can leave it as is.

[0022]

[Effect] As described above, according to the present invention, since the external electrode is brought into contact with the rolled portion of the recording material, a relatively large lateral pressure (recording Even if pressure is applied from the end face in the width direction of the material, it will not buckle,
This has excellent effects in that a good electrical connection can be realized and the entire surface of the recording material can be used for recording.

[0023] Furthermore, by having a conductive agent applied to the end face of the roll-shaped portion and forming a conductive path to the conductive layer through the conductive agent, the connection with the conductive layer of the recording material can be stabilized. It also prevents the roll from unraveling.

Furthermore, if at least one of the metal plate and metal foil is provided directly on the end face of the roll-shaped portion, the conductive layer of the recording material and the metal plate etc. can be brought into contact over a relatively large area; Continuity can be made more reliable. Furthermore, if at least one of a metal plate and a metal foil is brought into contact with the end surface of the roll coated with a conductive agent, the presence of the metal plate etc. can further enhance the above-mentioned effect of preventing the roll from unraveling. This effect is best achieved when the end face of the roll is bonded to a metal plate or the like using a conductive agent having adhesive strength.

Furthermore, if a conductive path to the conductive layer is formed through the conductive agent applied to the end surface of the core member, even if the conductor is pressed against the end surface of the core member, no load will be applied to the recording material. Electrical connection is possible without

Furthermore, if a conductive path to the conductive layer of the recording material is formed through the hollow inner surface of the core member around which the recording material is wound,
By enabling conduction from the inner surface of the core member, it is possible to conduct the recording material while suppressing an increase in the number of parts.

[0027] Furthermore, in an electrostatic recording material in which a conductive layer is formed so as to be exposed on the end surface, and a conductive agent is coated continuously on the end surface and the back surface, the conductive layer is exposed on the end surface of the recording material. The conductive layer of the recording material is connected to the film made of the conductive agent on the back side of the recording material through the applied conductive agent, and as a result, it can be grounded from the back side of the recording material in the same way as in the past. can be used for recording, and has the excellent effect that sufficient grounding can be obtained by arranging the conductive means for grounding near the position where the latent image is written on the electrostatic recording material.

[Brief explanation of the drawing]

1A to 1C are schematic configuration diagrams showing external electrodes that connect a conductive layer of a recording material to a recording device, respectively; FIG.

FIG. 2(a) is a perspective view showing a recording material roll according to a first embodiment, and FIG. 2(b) is a diagram showing a state in which a conductive agent is applied to the end surface of the recording material roll according to a second embodiment.

FIG. 3(a) is a perspective view of a recording material roll according to a third embodiment, and FIG. 3(b) is a diagram showing a state in which a conductive agent is applied to the end surface of the roll.

FIG. 4 is a diagram showing a state in which a conductive agent is applied to the end surface of the recording material roll according to the fourth embodiment.

FIG. 5 is a schematic configuration diagram showing external electrodes suitable for connecting the recording material roll of FIG. 4 to a recording device.

FIG. 6 is a schematic configuration diagram showing another external electrode suitable for connecting the recording material roll of FIG. 4 to a recording device.

FIG. 7 is a schematic configuration diagram of a recording material according to another embodiment of the present invention.

FIG. 8(a) is a perspective view showing a recording material roll according to still another embodiment of the present invention, and FIG. 8(b) is a diagram showing a state in which a conductive agent is applied to the end surface of the recording material roll.

FIG. 9 is a cross-sectional view of an electrostatic recording material consisting of a conductive base material and a dielectric layer.

FIG. 10 is a cross-sectional view of an electrostatic recording material consisting of an insulating base material, a conductive layer, and a dielectric layer.

FIG. 11 is a schematic configuration diagram of an electrostatic recording type recording apparatus to which the present invention can be applied.

[Explanation of symbols]

A Recording material 11 Recording material roll 12 Roll end face 20 Conductive agent, conductive paint 21 Conductive paint film 30 Conductive plate 40 Core member 41 Core member end face

Claims (7)

[Claims] 1. An electrostatic recording material obtained by winding an electrostatic recording material formed so that a conductive layer is exposed on the end surface into a roll shape, and applying a conductive agent to the end surface of the roll-shaped portion. 2. In an apparatus for forming a conductive path to a conductive layer of an electrostatic recording material, an electrostatic recording material formed so that the conductive layer is exposed on the end surface is rolled into a roll shape, and the rolled portion is 1. An apparatus for forming a conductive path to a conductive layer of an electrostatic recording material, characterized in that a conductive means connected to the conductive layer of the electrostatic recording material is provided on an end face. 3. The conductive means has a conductive agent applied to an end surface of the roll-shaped portion, and forms a conductive path to the conductive layer via the conductive agent. 2. A device for forming a conductive path to a conductive layer of an electrostatic recording material according to item 2. 4. The conductive means has at least one of a metal plate and metal foil connected to the end face of the roll-shaped portion or the conductive agent, and at least one of the metal plate and the metal foil. 4. The apparatus for forming a conductive path to the conductive layer of an electrostatic recording material according to claim 2, wherein the conductive path to the conductive layer is formed through the conductive layer. 5. An electrostatic recording material is wound around a core member to form a roll, a conductive agent is applied from an end surface of the roll-shaped portion to an end surface of the core member, and a conductive agent is applied to the end surface of the core member. 4. The apparatus for forming a conductive path to the conductive layer of an electrostatic recording material according to claim 3, wherein the conductive path to the conductive layer is formed via a conductive agent. 6. An electrostatic recording material is wound around a hollow cylindrical core member to form a roll, a conductive agent is applied from the end face of the roll-shaped portion to the hollow inner surface of the core member, and the conductive agent is coated on the core member. 4. The apparatus for forming a conductive path to the conductive layer of an electrostatic recording material according to claim 3, wherein the conductive path to the conductive layer is formed through a hollow inner surface. 7. An electrostatic recording material comprising an electrostatic recording material formed such that a conductive layer is exposed on the end surface, and a conductive agent coated continuously on the end surface and the back surface.