JPH0358843A - Image forming device using electrically conductive recording material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field 1] Using a recording material whose viscosity changes when energized, this recording material is selectively brought into a non-contact state and a contact state with respect to an electrode portion. The present invention relates to technology for forming images using, for example, technology for providing printing machines, printers, and various image forming apparatuses.

[Prior Art] Examples of applying such an image forming principle are currently being proposed in the present application and Japanese Patent Application No. 1983-702'J9 filed by the applicant. Hereinafter, such an image forming method will be explained with reference to the drawings.

FIG. 2 shows an enlarged sectional view of the image forming section, showing a pair of electrodes 1 and 2 facing each other, and a recording material which is sandwiched between the pair of electrodes and whose viscosity changes when energized. 3, and an image-shaped insulating portion 4 provided on the electrode.

This recording material is composed of at least a liquid dispersion and an electrolyte, and examples of materials that can be used are as follows.

Examples of polyhydric alcohol solvents that can be used as a liquid dispersion medium for the recording material of the present invention include ethylene glycol, brobylene glycol, diethylene glycol,
triethylene glycol, tetraethylene glycol,
Polyethylene glycol (weight average molecular weight, approximately 100~
1000), ethylene glycol monomethyl ether,
Examples include ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, methyl carbitol, and the like, and these polyhydric alcohol solvents may be used alone or in combination of two or more. The liquid dispersion medium is 40 to 95% by weight, and even 60% by weight based on the entire ink.
The content is preferably 85% by weight. The polyhydric alcohol solvent may also be used in combination with another liquid dispersion medium, and the polyhydric alcohol solvent may be used in an amount of 1 part to the total liquid dispersion medium in the recording material.
It is desirable that the content is 0 to 100% by weight.

Water is generally used as the other liquid dispersion medium, but other liquids can also be selected and used as appropriate, such as triethanolamine, formamide, dimethylhonolemamide, dimethinoresanolefoxide,・Methyl-2-brolidone, 1,3-dimethylimidazolidinone, N-methylacetamide, ethylene carbonate, acetamide, succinonitrile, dimethyl sulfoxide, sulfolane, furfuryl alcohol, N,N-dimethylformamide, etc. alone or Two types of mixed media can be used.

As the electrolyte, it is preferable to use one that does not generate halogen ions even by electrolysis.

Further, the electrolyte used in the present invention is preferably one that is difficult to deposit even by electrolysis, and one that can ensure electrical conductivity to the extent that voltage adhesion of the recording material can be smoothly controlled.

Preferred electrolytes that can be used in the recording material of the present invention include lithium borofluoride (LiBF.+), sodium hexafluorophosphate (NaPFa), ammonium hexafluorophosphate (N}!.+PFa), and sodium acetate (CHaCOONa). ), and can be used alone or in combination with other electrolytic materials.

FIG. 3 shows a state in which one of the pair of electrodes constituting the image forming part, electrode 1, is used as an anode and the other electrode 2 is used as a cathode, and a voltage is applied thereto.

FIG. 4 shows a pair of electrodes separated from each other in opposing positions while a voltage is applied between them.

In the figure, the recording material 3 does not adhere to the portion where the electrode 2 is in contact with the recording material 3, but the recording material 3 selectively adheres to the insulating portion 4 on the electrode 2. As a result, a pattern of the recording material is formed that corresponds to the shape formed by the electrode and the insulating section.

In FIG. 5, the polarity of the voltage applied between a pair of electrodes is reversed from that in FIGS. 3 and 4, with electrode 2 being the anode and electrode 1
The figure shows a voltage being applied using the electrode as a cathode.

FIG. 6 shows a situation in which the opposing positions of the electrodes are separated while a voltage is applied between the pair of electrodes; in this case, the recording material 3 is separated from the electrode 1 and adheres to the electrode 2.

In the case of Fig. 7, the opposing positions of the pair of electrodes are separated without applying a voltage between them, and the recording material 3 records information on both electrodes 1 and 2 due to its own viscosity. material 3
adheres to the recording material, making it impossible to form an image using the recording material on each electrode.

[Problems to be Solved by the Invention] It is an object of the present invention to use the above-mentioned recording material without wasting it and to increase the economic effect.

[Means for Solving the Problems] The present invention achieves the above object in an image forming apparatus that applies an ink material onto an original (master) and transfers ink corresponding to a pattern of the original onto an image receptor. An original plate having a pattern of conductive parts and non-conductive parts, a recording material as an ink material that has different adhesion states to positive and negative electrodes, a conductive container containing this recording material, and a recording material. The apparatus includes a coating means for coating the original onto the original, and an image receptor for transferring the pattern of the recording material on the original, and applies a bias voltage to prevent the recording material from adhering to the container.

[Example] Hereinafter, the present invention will be explained in detail according to examples.

Embodiment 1 FIG. 1a is a diagram that best represents the features of the present invention. In the figure, the ink K stored in the ink hopper KT is transferred to the ink carrying roll as the coating roll CR rotates (in the direction of the arrow). Move to KR. Then, when the liner KL made of a conductive material provided inside the ink hopper KT is used as a cathode and the coating roll CR is used as an anode, electricity is supplied from the power source BTI, and the ink K moves to the coating roll CR without adhering to the inner wall of the ink hopper. . At this time, the voltage of the power source BT2 was about 30 (DC), and the current was applied intermittently, but it may be applied as appropriate.

The liner KL may be any electrically conductive material, such as metal, paper or plastic-based aluminum foil, conductive paint, conductive rubber, or conductive paper, and may be appropriately selected from the ink hopper KT located outside the liner. .

FIG. 1b is a diagram showing only the ink storage section, and the coating roll CR is attached and detached from the main body of the apparatus together with the ink hopper KT to seal the opening of the ink hopper 10.

FIG. 1C is a diagram showing an example applied to the apparatus, in which the ink K stored in the ink hopper KT is transferred to the coating roll C.
As R rotates (in the direction of the arrow), it moves to the ink carrying roll KR.

The ink K is supplied from the power source BT2 using the ink carrying roll KR as the anode and the plate cylinder P as the cathode using the image forming method by energization. The ink K is selectively moved to the non-conductive portions on the plate to form an image. After the formed ink image is transferred to the blanket B, it is recorded by supporting the recording material RP together with the presser I.

At this time, the gap between the coating roll CR and the ink carrying roll KR is approximately 0.1 (mm), and the diameter is approximately 80 ('m).
In m), a steel material plated with platinum was used. The plate cylinder P has a diameter of approximately 1so (mm) and a surface of the light alloy with a diameter of 5 (mm).
It has a thick layer of conductive rubber, and the voltage of the power supply BT2 is approximately 30 (V) DC per width of approximately 80 (mm) for image formation.
The blanket cylinder B has a diameter of approximately 160 (mm) and is made of a light alloy with a 5 (mm) thick conductive rubber layer on the surface, or a blanket made of sheet-like conductive rubber with an equivalent thickness on the light alloy surface. A fixed device is used, and the number of rotations is approximately 1.
20 (RPM), the recording speed on the recording material is approximately 1000
(mm/sec) was obtained.

Embodiment 2 FIG. 8 is a diagram showing a second embodiment of the present invention, in which an ink hopper KT and a liner KL are detachably attached. When the liner KL of the ink storage part housed in the ink hopper KT serving as a guide is removed, the electric connector CN engages in conjunction with mechanical positioning and separation, and in this case, the connection is not made. To be released.

The liner KL of the ink storage section is made of a paper-based material coated with aluminum foil.

Example 3 FIG. 9 is a diagram showing a third embodiment of the present invention.

It has a sealing member S that can be opened and closed manually or in conjunction with mechanical positioning when the ink hopper KT is attached or detached, and is advantageous for storage and protection.

Example 4 FIG. 10 is a diagram showing a fourth embodiment of the present invention.

The ink hopper KT is provided with a recording material remaining amount inspection window F.

Example 5 FIG. 11 is a diagram showing a fifth embodiment of the present invention.

The ink hopper KT is equipped with a recording material remaining amount detector E, and this detection signal can be used to control energization.For example, when the remaining amount of ink K becomes smaller than a certain value, the liner Energization to KL and coating roll CR can be stopped.

The recording material used in this example had the following composition: glycerin 1 borofluoride lithium cyanide pigment colloidal hydrated silicate hexaglycerin polyricinoleate 00 10 10 60 20 parts by weight parts by weight Parts by weight Parts by weight Water For yellow ink: Glycerin Boro Lithium fluoride Yellow pigment Colloidal hydrated silicate Hexaglycerin Polyricinolate Water For magenta ink: 20 Parts by weight 1 0 0 1 0 1 0 60 20 Parts by weight Parts by weight Parts by weight 20 Parts by weight Glycerin 100 Parts by weight Lithium fluoroborate Magenta pigment Colloidal hydrated silicate Hexaglycerin Polyricinolate 10 Parts by weight 10 Parts by weight 60 Parts by weight 20 Parts by weight Water 20
Parts by weight For black ink: Glycerin 66 parts by weight Lithium borofluoride 7 parts by weight Carbon plaque
7 Parts by weight Colloidal hydrated silicate 3
It was 4 parts by weight of water and 22 parts by weight.

[Effects of the Invention] As explained above, the contact portion of the recording material container with the recording material is made of a conductive member, and the recording material can be supplied by controlling the energization, so that the recording material can be used without wasting it.

Easy to change colors.

Easy maintenance of recording material (ink).

It has the effect of

[Brief explanation of drawings]

FIG. 1a is a sectional view of an ink supply device embodying the present invention, showing the positions of the ink supply device and coating roll CR. FIG. 1B is a diagram showing only the ink storage section, and FIG. 1C is a diagram showing a printing machine using an ink supply device according to the present invention. 2 to 7 are diagrams showing the image forming principle to which the present invention is applied. FIG. 8 is a diagram showing a second embodiment of the present invention, and is a diagram showing a liner K
FIG. 9 is a cross-sectional view showing the third embodiment of the present invention and shows the state of the sealing member S that can be opened and closed; FIG. FIG. 11 is a diagram showing a fourth embodiment of the present invention, and is a cross-sectional view showing the state of the recording material remaining amount inspection window F. FIG. A cross-sectional view showing the state of E is shown. KT is the ink hopper K is the ink CR is the coating roll KR is the ink carrying roll KL is the liner BTI, BT2 is the electric source CN is the electric connector P is the plate cylinder B is the blanket cylinder I is the impression cylinder RP is the recording material lol 2 Illustration 3 illustrations yoke 4 illustrations 8 illustrations

Claims (1)

[Claims] (1) In an image forming apparatus that applies an ink material onto an original plate (master) and transfers the ink corresponding to the pattern of the original onto an image receptor, the original plate has a pattern of conductive parts and non-conductive parts; A recording material as an ink material having different adhesion states to electrodes of positive polarity and negative polarity, a conductive container containing the recording material, a coating means for applying the recording material onto the original plate, and a recording material on the original plate. An image forming apparatus using an energized recording material, comprising: an image receptor to which a pattern is transferred; and a bias voltage that prevents the recording material from adhering to the container is applied.