JPS595435B2 - Radial recording method for letters, numbers, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses a radiation type recording device, for example, a device that records characters such as letters and numbers by depositing independently charged symbol droplets on a recording medium to record uniform letters and numbers. It concerns the method of recording.

A symbol droplet is dropped onto the recording medium at high speed using an electrical signal,
Various methods of recording characters and related devices and machines are known in the art, all of which have conventionally used ink containing pigments or dyes and binders in the symbol droplets.

In other words, the ink had to be colored and have the property of being fixed on the recording medium. Although this is natural, this type of general ink had the drawback of clogging the nozzle of the recorder.
Furthermore, inks that use unsupported substances as colorants and other additives have the drawback of abrading the inner surface of the nozzle and changing the size of the nozzle. The droplets that are continuously flowed out from the nozzle at high speed must always have the same shape and size, otherwise the image quality of letters and numbers on the recording medium will be impaired. Otherwise, the image quality will be impaired again, but in order for the droplets to flow out at the same speed and in the same shape and size, it is absolutely necessary to avoid ink from clogging the nozzle. For this reason, conventionally, the nozzle had to be cleaned several times during work. In addition, conventional inks contain binders and binders, and the viscosity of the ink is relatively high, so there is a limit to the rate at which the ink can be extracted from the nozzle. For this reason, the recording speed of letters, numbers, etc. had to be slowed down depending on the type of ink. The present invention was invented with the aim of eliminating the drawbacks of these conventional methods.

The present invention will be explained in detail below.

Any radiation recorder, for example, has a nozzle at the end of a pipe connected to an ink tank and has an opening from which ink is discharged, and the ink discharged from the nozzle is reduced to a uniform shape and size. It has a device that splits the droplets into droplets, charges the droplets according to a signal, and further separates the charged droplets from the uncharged droplets, even if only the charged droplets are placed on the recording medium (
A recording device that has a device for forming characters, numbers, etc. by dropping it onto recording paper does not have a binder, which is a binding agent, and does not have a pigment or dye, which is a coloring agent.

Only a solvent such as water or alcohol is placed in an ink tank, the solvent is supplied from the ink tank to a nozzle at a predetermined pressure, and the solvent is discharged from a nozzle with a predetermined shape, such as a round shape (diameter 10 microns). It is divided into droplets of a certain shape, and a signal is applied from an information source device to charge the droplets that are to become a latent image.The charged droplets are then dropped onto a recording medium (for example, paper) to form an image. The droplets of solvent dropped on the recording medium are arranged in dots to form the desired literary numeral (for example (l:)). The droplets are deposited as a latent image.

Next, fine particle powder consisting of a pigment and a binder is sprinkled onto this latent image to form an image. Here, the fine particle powder is sprinkled immediately after a latent image is formed on the recording medium by small droplets, a screen with 5 to 8 micron punch is placed on the recording medium, and the fine particle powder is placed on the screen. , vibrate the screen and sprinkle it evenly over the entire recording medium,
Fine particles are applied onto the latent image and adsorbed thereon, and later the fine particles temporarily attached on the non-latent image are removed by suction, for example, in a vacuum chamber. In this way, a desired image is formed. The adhesion between the latent image created by the solvent droplets and the sprinkling fine powder is achieved by selecting a binder that is soluble in the solvent droplets, and when the fine powder comes into contact with the solvent droplets, the binder dissolves into the solvent droplets. I like to be treated while being treated. Examples of solvents used in the present invention include water, ethanol, ethylene glycol, acetone, tetrachloroethane, propyl acetate, butyl acetate, etc., but they have no fluidity, have a relatively high surface tension, and have a low dielectric constant. A relatively low value is preferred.

Further, the fine particle powder is composed of a pigment and a binder, and the ratio thereof is preferably 50:50 to 10:90, and a dye may be used instead of the pigment.

In some cases, dye alone may be sufficient. However, using only dyes has the disadvantage of poor resistance. The binder is styrene,
Examples include polyvinyl chloride, starch, casein, natural rosin, ceramic, affalt, low molecular weight polystyrene, ketone resin, maleic acid resin, coumaron resin, phenolic resin, and phenol-modified alkyd resin. Natural and synthetic resins that are hard, brittle, and easy to powder are preferred. Finally, after the fine particles are adsorbed onto the latent image, those using an oil-based solvent as the solvent and a resin as the binder are heated at around 100 to 150 C to fix the image on the recording medium. Alternatively, it is necessary to perform a process of passing it through a vapor such as Trichlorene.

However, when fixing an image using a combination such as water and starch, no means such as heat treatment is required. The present invention is constructed as described above, but in one embodiment, ethyl alcohol as a solvent is dripped as small droplets using a recording device and dropped onto a recording medium (high-quality paper). Draw the characters as a latent image, and then apply the following fine particle powder to 20
After sprinkling it onto a high-quality paper on which a latent image was recorded by placing it on a micron grid screen and vibrating it, it was placed in a vacuum chamber to absorb the fine powder on the non-latent image, and then heated at around 150℃ for 2 to 3 hours. "Mountains and the Sea" on high-quality paper in seconds
I recorded the words.

Fine particle powder pigment: 50 parts of carbon black (size of 20 microns or less) Binder: 50 parts of polystyrene resin (size of 5 microns or less) The present invention provides an ink that does not cause any harm to the nozzle of a radiation recorder. The use of the ink not only solves the conventional problem of nozzle clogging, which hinders work, but also minimizes the life of the nozzle without being consumed by inorganic substances in the ink, and improves the quality of the image. Changes in nozzle no longer occur due to nozzle wear.

Claims (1)

[Claims] 1. A fluid such as water or alcohol is ejected from a nozzle, split into small droplets, given a charge according to a signal, and only the charged droplets are separated and dropped onto recording paper to print desired letters, numbers, etc. A radiation-type recording method for letters, numbers, etc., characterized by recording a latent image, and applying fine powder such as pigment to the surface of the latent image and fixing it to form a visible image.