JPH02179639A - Developer applying device - Google Patents

Abstract

PURPOSE:To uniformly apply a developer on an arbitrary base by oscillating the developer and electrifying the developer to electrostatically stick the developer onto the base. CONSTITUTION:The base P, such as, ordinary paper, in a cassette 21 is transported by a transporting belt 24 of the developer applying device 2 and is brought into contact with an electrode roller 22 on which a positive voltage is impressed by a DC power source 25. On the other hand, the developer S is supplied onto a vertically oscillating piezoelectric oscillator 27, by which the developer is oscillated and floated. The developer is electrified by the friction of the particles thereof with each other. The developer S electrified negative is stuck onto the base P. The base P (color developing paper) stuck with the developer S is superposed on exposed microcapsule paper and is subjected to pressure development to form color images on the color developing paper; thereafter, the images are fixed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a color developer coating device for producing color developer paper by applying a color developer for image recording onto the surface of a support such as plain paper. Regarding.

[Conventional technology]

Recently, as a color copying machine, for example, Japanese Patent Laid-Open No. 61-137
No. 749, JP-A-61-143738 and JP-A-61
As shown in Japanese Patent No. 173981, etc., microcapsule paper carrying microcapsules that encapsulate a dye precursor and whose mechanical strength changes in response to light is exposed to light, and the microcapsule paper and paper after this exposure are The image forming medium (R colored paper) shipped by the manufacturer as a product is sent into a pressure developing device and brought into close contact with it, and the microcapsules with lower mechanical strength on the microcapsule paper are destroyed and the dye precursor and color developer paper that flow out are removed. The color image on the exposed microcapsule paper is transferred onto the developer paper by reacting with the color developer, and the developer paper after pressure development is sent to a heat fixing device to obtain a color image on the developer paper. types are emerging.

The color developer paper was generally prepared by diffusing a color developer in water or an organic solvent and applying the water or organic medium containing the color developer onto a support.

[Problem to be solved by the invention] However, as described above, when forming a color image,
If a paper manufacturer had to use pre-made developer paper, it would not be possible to form an image on any support desired by the user. For this reason, it is strongly desired by general users to develop a color developer coating device that can easily form color developer paper by applying color developer to any support such as plain paper. was.

However, in the case where water or an organic medium is used as described above, not only is it generally difficult to maintain the apparatus, but it is also difficult to maintain a constant diffusion state of the water or organic medium on the support. there were.

In addition, when using water, it takes a long time to dry, and when using an organic solvent, harmful gases are generated. At present, it is quite difficult to form a color developing paper by coating.

The present invention has been made to solve the above-mentioned problems, and provides a color developer that allows general users to form a color developer paper by uniformly applying the color developer to any support. The purpose is to provide a coating device.

[Means to solve the problem]

In order to achieve this objective, the developer coating device of the present invention includes:
Developer paper is created by attaching a color developer for image recording to the surface of a support such as plain paper.In a developer coating device, particulate developer is vibrated to form a powder mist. , a vibrator that charges particles by friction between particles, a support conveyance device for conveying the support, and the charged color developer is electrostatically attached to the support in the conveying width by the support conveyance device. It is equipped with an electrostatic adhesion device.

[Effect]

According to the present invention configured as described above, the particulate color developer floats in the form of a powder mist due to the vibration of the vibrator, and is charged by friction between the particles. Among these charged color developers, for example, a negatively charged color developer is attracted toward the support across the transport width by, for example, a positive electrostatic force by an electrostatic adhesion device, and adheres to the support. This allows the developer to be reliably and uniformly applied to the surface of any support such as plain paper without using water or organic solvents.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a color image recording apparatus M equipped with an embodiment of the color developer coating apparatus according to the present invention. A microcapsule paper (light-sensitive and pressure-sensitive paper) 7 running between a take-up roll 6 and an original 10 is exposed to light. Approximately at the center of the casing C of the color image recording device M,
A developer coating device 2 is provided, and a pressure developing device 3 is provided near the developer coating device 2.

In this pressure development device 3, the microcapsule paper 7 exposed by the exposure device 1 and the developer paper whose support P is coated with a developer S by the developer coating device 2 are superimposed and subjected to pressure development. Then, the color image of the microcapsule paper 7 is transferred onto the color developing paper. The color developing paper subjected to pressure development by the pressure developing device 3 is sent to a heat fixing device 4, and this heat fixing device 4 performs a fixing action on the color developing paper.

The exposure device 1 has a halogen lamp 8. Below the halogen lamp 8, a rotating color separation filter 9 for three primary colors is provided. 11"-". Guide rollers 12.12 are provided on the left and right sides of this document table 11, and the microcapsule paper 7 exposed at the lower part of the exposure device 1 passes through the guide rollers 12.12 provided on the downstream side of the exposure device 1, and then passes through the guide rollers 12.12 provided on the downstream side. One is co-supplied into the developing device 3.

The developer paper coated with the developer S on the support P by the developer coating device 2 is superimposed on the microcapsule paper 7 by the guide roller 13, and then transferred to the pressure rollers 14 and 14 of the pressure development device 3. A pressure developing action is performed by the pressure of this pressure roller 14.

The microcapsule paper 7 that has passed through the pressure developing device 3 is wound up by a take-up roller 6, and the color developing paper that has passed through the pressure developing device 3 passes through the heat fixing device 4 via a guide roller 15. Then, it further passes through a guide roller 16 and is discharged to the outside.

The developer coating device 2 has an outer box as shown in detail in FIG. 2, and a cassette for storing a support P such as plain paper is located at the lower left side of the outer box in the figure. A support insertion opening I communicating with 21 is provided above the insertion opening 2, and a developer paper outlet O for discharging a developer paper formed by coating the support P with a developer S is provided.

Inside the outer box, a large-diameter electrode roller 22 and a plurality of small-diameter conveyance rollers 23, 23, . A support conveyance belt 24 is stretched across the support conveyance device.A DC power supply 2I'5 that applies a positive voltage of, for example, several hundred volts is connected to the electrode roller 22, and the electrode roller 22 and the following piezoelectric Color development by creating an electric field in the spatial region with the vibrator 27? An electrostatic adhesion device for adhering the FIS to the support P is respectively configured.

A vibrator 26 is provided below the electrode roller 22 with a space of, for example, several inches in between. This vibrator 26 is
It mainly consists of a piezoelectric vibrator 27 that vibrates up and down by applying an alternating current, a metal holder 28 and a back electrode 29 that support both ends of the piezoelectric vibrator 27,
For example, the piezoelectric vibrator 27 has a power of several KH.
It is connected to an AC power source 30 that applies an AC voltage of z and to a ground 31, respectively.

A developer supply device 32 is provided on the side of the vibrator 26 for storing a granular developer S for replenishment and supplying the developer S to the vibrator 26 as needed. It is being

The support P such as plain paper stored in the cassette 21 is sent out from the support insertion opening I to the developer coating device 2, conveyed by the support conveyance belt 24, and transferred to the electrode roller 22. We come into contact with each other.

Here, an AC voltage of several KHz is applied to the piezoelectric vibrator 27 by an AC power source 30, causing it to vibrate up and down, and the developer S from the developer supply device 32 is applied to the upper surface of the piezoelectric vibrator 27.
As shown in detail in FIG. 3, the color developer S repeatedly vibrates so as to jump on the upper surface of the piezoelectric vibrator 27 as the piezoelectric vibrator 27 vibrates. Since the specific gravity of the particles of the color developer S is approximately 1 or less, the color developer S that has jumped out does not fall immediately and is transferred to the electric roller 22.
and the piezoelectric vibrator 27, the particles remain in a floating state for a certain period of time in the form of a powder mist.

At this time, the color developer S with a small floating amount from the piezoelectric vibrator 27
is not charged, but the color developer S, which has a large flying height and has been in the form of powder for a sufficient period of time, repeatedly contacts and collides with itself, so that it becomes positively or negatively charged due to friction.

On the other hand, since a positive voltage of, for example, several hundred volts is applied to the electrode roller 22 in contact with the support P by the direct current 25, in the spatial region between the electrode roller 22 and the piezoelectric vibrator 27, An electric field is generated.

In the spatial region where this electric field is generated, the charged color developer S exists in the form of a powder mist as described above. The charged color developer S follows this electric field and is attracted to the electrode roller 2 by electrostatic attraction.
2 and finally adheres to the surface of the support P.

Note that the positively charged color developer S cannot adhere to the support P because of electrostatic repulsion between it and the electrode roller 22, but releases a positive charge via the ground 31. After that, the powdery color developer S contacts and collides with each other again, and when it is negatively charged, it will adhere to the support P in the same manner as described above.

The support (developer paper) to which the developer is attached in this way is
The support is conveyed by the support conveyor belt 24 and taken out from the developer coating device 2 through the take-out port 0, and a color image is formed therein as described above.

FIG. 4 shows another embodiment, and the difference from the above embodiment is that the support conveyance belt 24 is passed between the belt rollers 33 and 33 separated by a predetermined distance, and the support conveyance belt 24 is A second DC power source 25 is applied to 24, and the support conveying belt 2 is placed between the belt rollers 33 and 33.
A vibrator 26 is arranged below the support conveyor belt 2.
4 and the vibrator 26 to generate an electric field.

FIG. 5 shows still another embodiment, in which a dielectric drum 35 is provided with a charged corotron 34 above the vibrator 26.
The dielectric drum 35 holds the developer S after being charged at one end, and then the support P is brought into contact with the dielectric drum 35 to cause the developer S to adhere to the support P. This is what I did.

〔Effect of the invention〕

As is clear from the detailed description above, according to the present invention, maintenance is relatively easy without using water or organic solutions, etc. A developer can be easily and reliably applied to a support.

Moreover, not only can a color developer paper be produced by uniformly attaching a color developer to a support, but also the layer thickness can be controlled relatively easily.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a color image recording device to which the developer coating device of the present invention is applied, FIG. 2 is a sectional view showing an overview of an embodiment of the developer coating device of the present invention, and FIG. 3 2 is an enlarged view of the main part of FIG. 2, and FIGS. 4 and 5 are schematic diagrams showing other different embodiments. 1... Exposure device, 2... Color developer coating device, 3...
Pressure developing device, 4... Heat fixing device, 22... Electric roller, 24... Support conveyance roller, 26... Vibrator, 27... Piezoelectric vibrator, 29... Back electrode, 30・
... AC power supply, 32... Color developer supply device. Applicant's representative Yasushi Ishikawa $Z 3 times

Claims (1)

[Claims] In a developer coating device that creates developer paper by attaching a developer for image recording to the surface of a support such as plain paper, the particulate developer is vibrated to form a powder mist, and A vibrator that charges particles by friction between particles, a support conveyance device that conveys the support, and an electrostatic device that electrostatically attaches the charged color developer to the support of the conveyance width by the support rod conveyance device. A color developer coating device comprising an electrodeposition device.