JPH04185475A - Image recorder - Google Patents

Abstract

PURPOSE:To remove residual ink from an image recorder without requiring manual operation by applying a voltage between the surface of a cleaning member and a member contacting therewith before the residual ink is dried. CONSTITUTION:Upon finish of print operation, a platen drum 5 is separated from other rollers and brought into contact with a first cleaning roller 11. A voltage V1 is then applied between the platen drum, i.e., a negative pole, and the first cleaning roller 11, i.e., a positive pole, while simultaneously they are rotated to separate the residual ink from the platen drum 5 and adhere the residual ink entirely onto the outer surface of the first cleaning roller 11. The uppermost layer is then exfoliated together with the residual ink and discarded.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention applies ink whose adhesion changes depending on the polarity of an applied voltage onto a printing plate in a pattern, and then applies the ink pattern on the printing plate to a printed material. The present invention relates to an image recording device that transfers onto a body.

[Conventional technology] Lithographic printing, letterpress printing, gravure printing, etc. are used in printing technology, but they require complicated processes to create plates and require dampening water to butter the ink. It was extremely troublesome to handle. Furthermore, the adhesion of the ink was easily affected by temperature and humidity, and it lacked environmental stability. For this reason, there are many difficulties in applying conventional printing techniques to recording peripheral devices such as computers.

On the other hand, printers using various recording methods, such as laser beam printers, inkjet printers, thermal transfer printers, wire dot printers, and daisy-foil printers, are known as recording peripheral devices for computers and other devices. However, there was a problem in that it was not suitable for the large-volume printing achieved by the above-mentioned printing technology in terms of cost and the like.

To solve these problems in printers, when a voltage is applied to ink through a pair of electrodes, adhesive ink no longer adheres to the electrodes, or non-adhesive ink adheres to the electrodes. By supplying the ink between an electrode (plate) with a desired pattern and a counter electrode, and applying a DC voltage between the pair of electrodes, the pattern of the electrode is The present inventors have developed an image recording device that records images by changing the adhesion of ink accordingly (Japanese Patent Laid-Open No. 1-31628).
(Refer to Publication No. 8).

[Problems to be Solved by the Invention] In the conventional image recording apparatus described above, if the ink remaining on the surfaces of the inking member, plate, and intermediate transfer member is not removed immediately after printing is completed, the ink dries and the ink is damaged. The king member, plate, and intermediate transfer member may adhere to each other, causing problems in the next printing, but since the ink residue on these surfaces could not be completely removed without manual intervention, it was necessary to clean the ink after printing was completed. was a very tedious task.

An object of the present invention is to provide an image recording apparatus that can remove ink remaining in the image forming apparatus without manual intervention.

[Means for Solving the Problems] The image recording apparatus of the present invention includes a cleaning member having a conductive member on its surface, an inking member having conductivity that applies ink in a pattern on a printing plate, and the inking member. It has a power supply that applies a voltage between the surface of the cleaning member and a member whose surface abuts the cleaning member to move the ink remaining on the member or the plate toward the cleaning member.

[Function] After printing is completed and before the ink residue in the image recording device dries, a voltage is applied to the surface of the cleaning member so that the ink residue moves toward the cleaning member having a conductive member on the surface. The voltage may be applied between the cleaning member and the member whose surface is in contact with the cleaning member.

[Example] Next, an example of the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view showing an image recording apparatus which is an embodiment of the present invention, FIG. 2 is a partially sectional side view of a cleaning roll 11, and FIG. 2 is a perspective view showing an example of a plate 4. FIG.

The image recording device of the present invention includes at least one pair of conductive members. In the image recording apparatus shown in FIG. 1, an ink carrying roll 1 and a plate roll 3, which are inking members, are a pair of conductive members.

The ink carrying roll 1 is a member that has a cylindrical shape and rotates in six directions indicated by arrows. This ink carrying roll 1 is preferably made of a conductive material such as aluminum, copper, or stainless steel.A recording material is coated on the surface (cylindrical surface) of the ink carrying roll 1 by a coating roll 9 rotating in the direction of arrow E. The ink 2 is formed to have a uniform thickness. The material constituting the ink carrying surface of the ink carrying roll 1 may be any material that can form a desired layer of the ink 2 on its surface by conveying the ink 2 by rotation in the six directions of the arrows. If so, it can be used without any particular restriction. More specifically, a conductor made of metal such as stainless steel is preferred.

The surface of the ink carrying roll 1 made of such a material is
Although it may be a smooth surface, from the point of view of further improving the conveyance and carrying capacity of the ink 2, it is preferable to have an appropriately rough surface (for example, according to JIS B
The ink 2, which preferably has a surface roughness of about IS (0601), is replenished into the ink reservoir 10.

The ink 2 on the surface of the ink carrying roll 1 comes into contact with the plate 4 on the plate roll 3 rotating in the direction of arrow B, and the ink 2 is transferred to the image area of the plate 4 to form an ink image.
For example, a plate for offset printing, a plate for gravure printing, a letterpress plate, etc. can be used.

Further, the plate 4 is composed of a conductive part and an insulating part, and for example, by applying a voltage between the plate 4 and the ink carrying roll 1, the ink does not adhere to the conductive part of the plate 4, and the ink adheres only to the insulating part. Alternatively, a roll may be further interposed between the printing plate 4 and the ink carrying roll 1 to form a uniform ink layer (or the rolls may be used as a pair of conductive members). A voltage may be applied.The blank cylinder 5, which is an intermediate transfer member, rotates in the direction of arrow C while being in pressure contact with the plate 4, and transfers the ink image on the plate 4 to the blank cylinder 5.

The impression cylinder 6 rotates in the direction of the arrow while being in pressure contact with the blank cylinder 5,
The recording medium 7 (
The ink image on the blank cylinder 5 is transferred onto (paper, cloth, metal sheet, etc.). An image corresponding to the ink image is formed on the recording medium 7.

In some cases, the ink image on the plate 4 may be directly transferred onto the recording medium 7 without providing the blank cylinder 5, but the surface material of the blank cylinder 5 can prevent wear and deterioration of the plate 4. The image with the same pattern as plate 4 can be transferred to recording medium 7.
You can get on top.

Now, if the ink layer on the blank cylinder 5, plate 4, and ink carrying roll 1 is not removed after printing is completed, the ink layer will dry and cause problems in the next printing.

A plate 4 wound around a plate roll 3 is in contact with the ink 2 on the surface of the ink carrying roll 1.
As shown in the figure, a base material 4a made of a conductive material such as metal
A desired pattern 4b of insulating material is provided thereon. Materials for the base material 4a include aluminum, copper, stainless steel, platinum, gold, chromium, nickel, phosphorous copper,
Carbon, conductive polymer, or various polymers in which metal fillers are dispersed are used. pattern 4
As the material b, thermal transfer recording materials (mainly wax and resin), electrophotographic toners, vinyl polymers, and natural or synthetic polymers are used.

As the plate 4, a plate having an insulating film on which an image-like conductive pattern is formed by discharge breakdown on a base material made of a conductive material can also be used. Furthermore, a plate having a photographic image in which a conductive pattern of a silver image is formed by depositing silver particles on a base material made of a conductive material can also be used. Further, the shape of the plate 4 is not limited to a flat surface, and may be a roll shape, a curved shape, or a polygonal shape.

The shape of the ink carrying roll 1 is not limited to a roll, and a blade-like application member may also be used.

In this way, by applying a voltage between the plate 4 and the ink carrying roll 1 from the power source 14, the adhesion of the ink 2 that comes into contact with the conductive portion of the plate 4 changes, and the difference in adhesion causes the ink 2 to be applied onto the plate. It is deposited in a pattern to form an ink image. The voltage of the power supply 14 is practically 3 to 100V,
Furthermore, a DC voltage of 5 to 80 V is preferable, and a high frequency (10
Hz ~ 100kHz) AC bias voltage (1ov
By further applying −t 0OV), the image quality can be improved by −
It can be sharpened by 1.

Furthermore, in this embodiment, after printing is completed, the blank cylinder 5, the plate 4
and a first cleaning roll 1 which is a cleaning member for removing ink on the ink carrying roll 1.
1. A second cleaning roll 12 and a third cleaning roll 13 are provided, and a power source 15 for applying a voltage such that the potential of the first cleaning roll 11 is higher than that of the blank cylinder 5 by an amount of V , a power supply 16 for applying a voltage such that the potential of the second cleaning roll 12 is higher than that of the plate 4 by V2, and a voltage of the third cleaning roll 13 is V2 higher than that of the ink-carrying roll 1. A power source 17 is provided for applying a voltage that reaches a potential.

These cleaning rolls 11, 12, and 13 are constructed by stacking conductive members in multiple layers so that they can be peeled off one by one. Specifically, as shown in Figure 2,
Metal sheets, sheets with conductive fillers such as carbon or metal powder dispersed in polymers or ceramics, or sheets with metal powders such as copper or nickel dispersed in resin fibers such as polyethylene fibers or polypropylene fibers, carbon fibers ( A conductive porous sheet, such as carbon paper) or a conductive porous sheet made by dispersing conductive filler in the resin and making it porous by foaming, sintering, swelling, etc., is used as a cylindrical base material.
Each conductive layer 11 is wound around the outer circumference of a (mandrel) layer by layer using an adhesive such as vinyl acetate, neorene, EVA, epoxy, acrylic, carboxymethyl cellulose, etc.
A configuration in which a to 11-h are formed can be used.

The conductivity of the sheet forming each conductive layer is σ = 10−'Ω
-1 or more is preferable.

The number of layers of the conductive layer is 10 layers to 1000 layers, more preferably about 50 layers to 700 layers, and the 0 layer thickness is 10 μm to 2 mm.
degree is preferred.

When the conductive layer is formed from a porous sheet, the above-mentioned effects can be further obtained.

In addition, from the viewpoint of mechanical strength, the base 11-j is
Cylindrical molded bodies made of metal such as stainless copper, aluminum, copper, etc., and resin molded bodies made of plastics such as polyamide, polyethylene, polyacetal, polycarbonate, etc., are used.

Note that the cleaning member is not limited to the above-mentioned cleaning roll, but may also be a multilayer structure in the shape of a flat plate, a semicircle, or an appropriate curved surface.

Next, a description will be given of an operation when cleaning is performed after printing using the image recording apparatus of this embodiment is completed.

After printing is completed, the voltage applied between the ink carrying roll 1 and the printing plate 4 is turned off, and the printing cylinder 5 is made independent from the other rolls by moving its rotating shaft by means not shown. Next, the first cleaning roll 1 is placed on the blank cylinder 5.
1 are brought into contact with each other, and a voltage V1 is applied such that the blank cylinder 5 becomes a negative electrode and the first cleaning roll 11 becomes a positive electrode by turning on the power source 15.
By rotating the cleaning roll 11, the ink residue is peeled off from the blank cylinder 5 and completely adhered to the outer surface of the top layer of the first cleaning roll 11. Next, the top layer of the first cleaning roll 11 is removed. You can peel it off along with the ink residue and discard it. On the other hand, the first
Since the cleaning roll 11 has a new conductive layer on its outer surface, the blank cylinder 5 can be cleaned in the same manner again.

Similarly, when removing ink residue (not shown) remaining on the plate 4, the plate roll 3 is made independent of the other rolls by moving its rotation axis by means not shown. The second cleaning roll 12 is brought into contact with the plate roll 3 and the second cleaning roll 12 is applied on the plate roll 3 and the second cleaning roll 12 is applied by turning on the power supply 16 so that the plate 4 becomes the negative electrode and the second cleaning roll 12 becomes the positive electrode. By rotating the cleaning roll 12 of 2, the ink residue is removed from the plate 4.
First, the top layer of the second cleaning roll 12 may be peeled off and discarded together with the ink residue.On the other hand, Since the second cleaning roll 12 has a new outer surface of a conductive layer, the plate 4 can be cleaned in the same manner again.

Similarly, when removing ink residue (not shown) remaining on the ink carrying roll 1, the ink carrying roll l is
The rotating shaft is moved by means not shown to make it independent from other rolls. Next, the third cleaning roll 13 is brought into contact with the ink carrying roll 1, and a voltage V is applied such that the ink carrying roll 1 becomes the negative electrode and the third cleaning roll 13 becomes the positive electrode by turning on the power supply 17, and at the same time By rotating the ink carrying roll 1 and the third cleaning roll 13, the ink residue is peeled off from the ink carrying roll 1 and completely adhered to the outer surface of the uppermost layer of the third cleaning roll 13. next,
The uppermost layer of the third cleaning roll 13 may be peeled off together with the ink residue and discarded. On the other hand, since the third cleaning roll 13 has a new conductive layer on its outer surface, the ink carrying roll 1 can be cleaned again in the same manner.

Furthermore, in the case of an image recording apparatus in which the blank cylinder 5 is omitted, the first cleaning roll 11, the power supply 15, and the cleaning operation thereof are also omitted.

The cleaning rolls 11, 12, and 13 may be brought into contact with the blank cylinder 5, the cylinder roll 3, and the inlet carrier roll l with a constant pressure during cleaning, but if necessary, each cleaning roll may be contacted with the above-mentioned rolls. It is preferable to have an interval adjustment means such as a screw so that the interval can be set to a predetermined distance. These may be performed electrically or manually.

In addition, the contact width between the cleaning roll surface and each roll surface is usually about 0.1 mm to 30 mm, and this contact width can be set appropriately depending on the amount and type of ink. If the sheet is made of a porous sheet, the sheet can be peeled off with the ink soaked in the sheet, and the peeled sheet can be handled very easily.

Further, the cleaning member may have a structure in which the entire conductive member can be easily replaced every time the cleaning is performed, instead of having a multilayer structure with a conductive member on the surface.

Furthermore, a method may also be used in which only one cleaning roll is provided in the entire apparatus and a voltage is applied between the cleaning roll and the roll whose outer peripheral surface is in contact with the cleaning roll so that the ink residue moves toward the cleaning roll. good.

Practically speaking, the power supply for the voltage applied during cleaning is preferably a DC voltage of 3 to 100 V, more preferably 5 to 80 volts, and a high frequency (10 Hz to 100 kHz) (7) AC bias voltage (10 V to 10 ov) is preferred. By applying it, the cleaning effect is further enhanced.

The above-described cleaning method according to the present invention can be applied to a printing process using ink whose adhesion changes depending on the application of voltage, and the cleaning method of the present invention can be applied to a printing process that uses ink whose adhesion changes depending on the application of voltage. It can be suitably used for cleaning plate rolls, plan cylinders, etc.

Furthermore, even if the ink residue is present on the flat plate rather than on the roll, cleaning can be performed by moving the cleaning member along the flat plate using a drive means suitable for the purpose.

In this embodiment, the plate 4 side is the cathode and the ink carrying roll 1 side is the anode, but depending on the properties of the ink used, the plate 4 side may be the anode and the ink carrying roll 1 side is the cathode.

Specifically, the voltage from the power source 14 is preferably applied between the respective rotation axes of the printing roll 3 and the ink carrying roll 1.

The thickness of the layer of ink 2 formed on the surface of the ink carrying roll 1 depends on the size of the gap between the ink carrying roll 1 and the coating roll 9, the fluidity or viscosity of the ink 2, the material of the surface of the ink carrying roll 1, etc. Although it varies depending on the roughness or the rotational speed of the ink carrying roll 1, it is approximately 0.001 to 100 at the ink transfer position where the ink carrying roll 1 faces the pattern plate 4 on the plate roll 3.
It is preferably about mm, more preferably 0.001 to 10 mm.

If the layer thickness of the ink 2 is less than 0.001 mm, it becomes difficult to form a uniform ink layer on the ink carrying roll 1. On the other hand, if the ink layer thickness exceeds 100 mm, it becomes difficult to convey the ink 2 while keeping the surface layer of the ink layer (the layer in contact with the conductive pattern plate 4) at a uniform circumferential speed. Roll 1 and conductive pattern plate 4
It is no longer easy to connect electricity to the device.

If the ink 2 contains water (water-soluble ink, emulsion ink), it can be changed from adhesive to non-adhesive by voltage application and can be used in the image recording apparatus of the present invention.

Next, the mechanism by which ink changes from adhesive to non-adhesive due to voltage application will be explained.

When the ink is energized by applying a voltage, it electrolyzes to generate gas, and this gas prevents the ink from adhering to the electrodes. In order for the ink to electrolyze and generate gas, the ink contains a solvent such as water, alcohol, or glycol, or a solvent in which an electrolyte such as sodium chloride or potassium chloride is dissolved. The lower the electrical resistance of the ink, the better, and it is preferable to make the volume resistance 10'Ω・Cl11 or less. If the 0 volume resistance exceeds 10'Ω・cm, the amount of current will decrease, or to prevent the amount of current from decreasing. high
Voltage is required.

Further, regarding the transfer of ink to the plate, almost the entire thickness direction of the portion of the ink layer to which the voltage is applied is transferred (hereinafter referred to as bulk transfer).

The ink has a weak cohesive force in liquids such as water and alcohol, and suitable adhesion cannot be obtained.This ink was applied to a 2 mm thick plate of platinum-plated stainless steel plate that was placed vertically. In some cases, it is preferable that the ink be substantially retained on the platinized stainless steel plate.

In addition, ink was sandwiched between two platinum-plated stainless steel plates to make the ink thickness 2 mm, and when the two platinum-plated stainless steel plates were separated from each other with no voltage applied, ink did not appear on either plate. It is preferable that they adhere to the same degree.

The viscosity of the ink is 10' to 10' at a shear rate of 10 rad/s and a temperature of 25°C. Poise, even 10
'~10'' poise is preferred.

Ink that uses the above-mentioned mechanism is basically composed of inorganic or organic fine particles and a liquid dispersion medium. The fine particles in the ink make it easier to cut the ink and improve the resolution of the image. Ink is an amorphous solid of a colloidal sol and is a non-Newtonian fluid in terms of fluidity.

In order to change the adhesion of ink by applying voltage, fine particles are contained in the ink. A fine particle dispersion is formed by kneading in the above-mentioned liquid dispersion medium, for example, in a homogenizer, a colloid mill, or an ultrasonic disperser. Such particles include metals (Au, Ag,
Cu, etc.) particles, sulfides (zinc sulfide ZnS, antimony sulfide 5bzSs, potassium sulfide 2S, calcium sulfide CaS, germanium sulfide GeS, cobalt sulfide CoS, tin sulfide SnS, iron sulfide FeS, copper sulfide C+gS, manganese sulfide MnS, sulfide Molybdenum Mo5ss, etc.) particles, silicic acid (orthosilicic acid H4S1
04, metasilicate HzSiOs, mesotrisilicate H,Si
20. , mesotrisilicate H2S1,0. , mesotetrasilicic acid H851, 4011, etc.) particles, polyamide resin particles, polyamideimide resin particles, iron hydroxide particles, aluminum hydroxide particles, fluorinated mica particles, polyethylene particles,
Montmorillonite particles, fluororesin, etc. can be used. It is also possible to use polymer particles containing various charge control agents used as toners for electrophotography.

The above-mentioned fine particles have an average particle diameter of 1.00 μm or less,
Preferably, particles with a diameter of 0.1 μm to 20 μm, especially 10 gm or less, can be used, and such fine particles are present in the ink in an amount of 1 part by weight or more, preferably 3 parts by weight to 90 parts by weight, based on 100 parts by weight of the ink. Preferably from 5 parts by weight
It can be contained in an amount of 60 parts by weight.

Liquid dispersion media used in ink include ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and polyethylene glycol (weight average molecular weight, approximately 10
0-1000), ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, methyl calpitol, ethyl calpitol, butyl calpitol, ethyl calpitol acetate, diethyl calpitol, triethylene glycol monomethyl ether, triethylene Glycol monoethyl ether, propylene glycol monomethyl ether, glycerin, triethanolamine, formamide, dimethylformamide, dimethyl sulfoxide, N-methyl-2-pyrrolidone, 1.3-
dimethylimidazolidinone, N-methylacetamide,
Ethylene carbonate, acetamide, succinonitrile, dimethyl sulfoxide, sulfolane, furfuryl alcohol, N,N-dimethylformamide, 2-ethoxyethanol, hexamethylphosphoric triamide, 2-nitropropane, nitroethane , γ-butyrolactone, propylene carbonate, 1,2,6-hexandriol, dipropylene glycol, hexylene glycol, and the like can be used alone or in combination of two of them. The liquid dispersion medium is used in an amount of 40 to 95 parts by weight, more preferably 60 parts by weight, per 100 parts by weight of the ink.
It is preferable to contain up to 85 parts by weight.

In a preferred embodiment, in order to control the viscosity of the ink, the above-mentioned polymer soluble in the liquid dispersion medium is added to the ink material in an amount of 1 to 90 parts by weight, more preferably 1 to 90 parts by weight, based on 100 parts by weight of the ink material.
It can be contained in an amount of 50 parts by weight, particularly 1 to 20 parts by weight. Such polymers include vegetable polymers such as guar gum, locust bean gum, gum arabic, taragant, carrageenan, pectin, mannan, and starch; microbial polymers such as xanthan gum, dextrin, succinoglucan, and gartran; gelatin, casein, Animal polymers such as albumin and collagen; cellulose polymers such as methyl cellulose, ethyl cellulose, and hydroxyethyl cellulose; starch polymers such as soluble starch, carboxymethyl starch, and methyl starch; alginate polymers such as propylene glycol alginate and alginate;
Semi-synthetic polymers such as saccharide derivatives: vinyl polymers such as polyvinyl alcohol, polyvinylpyrrolidone, polyvinyl methyl ether, carboxyvinyl polymer, sodium polyacrylate; their conversion polyethylene glycol, ethylene oxide, propylene oxide block copolymers , alkyd resin, phenol resin, epoxy resin, aminoalkyd resin, polyester resin, polyurethane resin, acrylic resin, polyamide resin, polyamideimide resin, polyesterimide resin, silicone resin, and other synthetic polymers are used alone or in combination of two or more. be able to. It is also possible to use greases such as silicone grease and liquid polymers such as bolybdenum.

Since the change in ink adhesion is caused by the generation of gas due to electrolysis, water, methanol,
A solvent such as ethanol, glycerin, ethylene glycol, or propylene glycol, or a solvent in which an electrolyte such as potassium iodide or lithium borofluoride is dissolved is preferably used. The contents of the liquid dispersion medium and fine particles are the same as those described above. In particular, when water or a liquid containing water is used as a liquid dispersion medium, hydrogen gas is easily generated on the cathode side, which is preferable.When water and another liquid dispersion medium are mixed, the water content is It is preferably 1 part by weight or more, more preferably 5 parts by weight or more per 100 parts by weight.

In the case of ink that generates gas through electrolysis, the fine particles contained in the ink include those previously fried, as well as silica, fluorocarbon, titanium oxide, carbon black, and fluorocarbon.

In a preferred embodiment of the ink, considering the viscoelastic properties of the ink, it is preferable to use swellable fine particles capable of retaining the above-mentioned liquid dispersion medium as all or part of the fine particles in the ink. For example, N
a-montmorillonite, Ca-montmorillonite, 3-
Octahedral synthetic smectite, Na-hectolite, Li-
Examples include fluorinated micas such as hectorite, Na-teniolite, Na-tetrasilicic mica, and Li-teniolite, synthetic mica, and silica. The above-mentioned fluorinated mica can be represented by the following general formula (1).

General formula (1) % formula %) In the formula, W is Na or Li, and X and Y are M g t ”
, p e * +.

6-coordinate ions such as Ni", Mn", AI", Fe", Li", 2 is AI", Si", Ge",
Fe”, B” or a combination thereof (AI”/Si
”) represents a cation with a coordination number of 4.

The average particle diameter of the swellable fine particles is preferably 75 μm or less, more preferably 0.8 to 15 μm, and preferably 8 μm or less in a dry state.

The ink may contain colorants such as carbon black and other dyes and pigments that are generally used in the fields of printing and recording, if necessary. When the ink contains a coloring material, the content of the coloring material is 0.00 parts by weight per 100 parts by weight of the ink.
The amount is preferably 1 to 40 parts by weight, and more preferably 1 to 20 parts by weight. In addition, a color-forming compound that develops color upon application of voltage may be contained instead of or together with the colorant.

In addition, electrolytes that give conductivity to ink, thickeners,
It may contain a thinning agent, a surfactant, etc. or,
It is also possible for the above-mentioned fine particles themselves to also function as a coloring material.

To obtain such an ink, for example, a liquid dispersion medium and fine particles may be mixed in a conventional manner.

[Effects of the Invention] As explained above, the present invention enables ink residue to be removed without manual intervention by incorporating an ink residue cleaning means into the apparatus, and the maintenance of the apparatus is facilitated. There is a certain effect.

[Brief explanation of drawings]

1 is a schematic side view of an image recording apparatus that is an embodiment of the present invention, FIG. 2 is a partially sectional side view of the cleaning roll 11 in FIG. 1, and FIG. 3 is a schematic side view of an image recording apparatus used in the apparatus shown in FIG. FIG. 4 is a perspective view showing an example of a plate 4 to be used. ■... Ink carrying roll, 2... Ink, 3...
Plate roll, 4... plate, 5... plan cylinder, 6... impression cylinder, 71. . Recorded object, 8... Ink image, 9... Coating roll, 10... Ink reservoir, 11... First cleaning roll, 12... Second cleaning roll,
13...Third cleaning roll, 14...Power source, 15...Power source, 16...Power source, 17...Power source. Patent applicant Canon Co., Ltd.

Claims (1)

[Scope of Claims] An image recording apparatus that applies ink whose adhesion changes depending on the polarity of an applied voltage onto a plate in a pattern, and transfers the ink pattern on the plate to a recording medium, comprising: A cleaning member having a cleaning member on its surface, a conductive inking member that applies the ink in a pattern on the plate, and a voltage that moves the ink residue on the plate toward the cleaning member. An image recording apparatus characterized by having a power source applied between a surface of a cleaning member and a member whose surface abuts the cleaning member.