What are the components of a common electrostatic photocopier, and what are the functions of each on

Analog Copier:

Digital Copier:

The principle of electrostatic copying is a method of obtaining a copy using the principle of electrostatic induction. When the surface of the photosensitive material with static electricity is used by electrostatic induction, the local charge changes with the intensity of the light according to the image and the electrostatic latent image is retained. It has the advantages of being simple, fast, clear, expandable and miniaturized, and can also copy color originals.

The wide application of modern electronic technology has brought a lot of convenience to people and greatly improved work efficiency.

If you want to make a copy of a test paper or a document, you only need to spend a few cents, and it will be done in a few minutes. This is all thanks to the electrostatic copier.

Electrostatic photocopiers are made by using the principle that positive and negative electrostatic charges can attract each other. Utilizes photosensitive semiconductor materials.

The electrostatic and photosensitive properties are used to transfer the text and images on the document to the reproduction process on paper by methods similar to photography and printing.

Its copying procedure is: the photosensitive semiconductor is charged first, and then the original ** is placed on the charging surface to form an electrostatic latent image, and the imaging area adsorbs the toner with a heterosexual charge and converts it into a visible image; Then use the heating method to fix ** on the copy paper and become a copy.

Direct and indirect copies:

In the early days, photocopiers used direct copying, and first let the copy paper carry the corresponding electrostatic charge according to the depth of the picture text, the deep charge is dense, and the shallow charge is sparse, so as to form an electrostatic image corresponding to the picture text. Then a black ink powder is directly attracted to the electrostatic image, and through fixing, it finally becomes a photocopy of a picture text.

However, in the past 30 years, the international use of indirect photocopying methods has been adopted. In indirect copying, the electrostatic image is not formed directly on the copy paper, but on a "toner cartridge" composed of a selenium light guide material.

Through development, the ink powder is adsorbed on the electrostatic image, and then transferred to the copy paper to become a copy of the text and pictures. Copy paper can be copied even on ordinary paper, and it is very convenient because the paper does not need to be treated with static electricity like the direct copying method.

Categories: Education, Science, >> Science & Technology.

Analysis: Continue yesterday's talk Yesterday said that it was past the development.

After the development, there's a layer of toner on the drum, which is the same text as the copy.

What does the pattern look like, it's a layer of toner that is adsorbed on the paper by static electricity.

And then the drum goes down and you get to the transfer section, and the copy paper is on top of the transfer, and when the drum turns, the copy paper passes between the drum and the transfer.

At this time, the transfer will be discharged, and the transfer electrode will have the opposite charge on the drum, which is attracted by the opposite sex, but this charge is stronger than the one on the drum, so the toner on the drum is sucked off, and then the paper is on the top of the drum, so the toner will not fall on the transfer, but on the copy paper.

In this way, there is the same text on the paper as a photocopy, but it cannot be taken out and used at the moment, because this layer of toner is still floating on the cracked paper, in which case the text will be blurred when you touch it by hand.

So you also need to fix, what is the problem of fixing. This thing is a bit similar to an iron, with a high-temperature roller on the top and a rubber roller on the bottom, which is to iron the toner on this paper at high temperature and high pressure.

This is the simplest principle of photocopying.

However, in practical application, there will be some more things, such as zooming in and out, you need to use a lens that can move, when zooming out, in order to prevent the extra frame from becoming black, anti-vinyl is also added, and in order to dispose of the remaining toner on the drum after each copy, there is a scraper and a component to collect waste toner.

In order to balance the early stage, the drum was evenly charged, and there was a structure of primary and secondary charging, and in order to remove all the charges left over from the last copy, a lamp was added.

1. The electrostatic photocopier is made by using the principle that the positive and negative charges of electrostatic electricity can attract each other. Taking advantage of the electrostatic and photosensitive properties of photosensitive semiconductor materials, Zhi Xing Chong uses a method similar to photography and printing to transfer the text and images on the document to the reproduction process on paper.

2. When the surface of the photosensitive material with static electricity is made by electrostatic induction, the local charge changes with the intensity of the light according to the image and the electrostatic latent image is retained, and the copy is obtained by a certain dry method of development, image transfer and fixing.

3. The photocopying procedure is: the photosensitive semiconductor is charged first, and then the original is ** on the charging surface to form an electrostatic latent image, and the toner with a heterosexual charge is adsorbed in the imaging area and converted into a visible image, and then the ** is fixed on the copy paper by heating method to become a copy.

The principles of electrostatic copying are described as follows:

1. The electrostatic photocopier is made by using the principle that the positive and negative charges of electrostatic electricity can attract each other.

2. Direct copying and indirect copying The early photocopiers used direct copying, first let the copy paper carry the corresponding electrostatic charge according to the depth of the picture text, the deep charge is dense, and the shallow charge is sparse, so as to form an electrostatic image corresponding to the picture text;

3. A kind of ink powder that shows black is directly attracted by the electrostatic image, and finally becomes a copy of a picture text through fixing. However, in the past 30 years, the international method of indirect photocopying has been adopted;

4. When indirectly copying, the electrostatic image is not directly formed on the copy paper, but is formed on a toner cartridge composed of selenium light guide material, and through development, the ink powder is adsorbed on the electrostatic image book, and then transferred to the copy paper to become a copy of the text and pictures. Copy paper can be copied even on ordinary paper, and it is very convenient because the paper does not need to be closed with electrostatic treatment like in the direct copying method.

The whole process of laser printer work can be said to be a cycle of seven big steps, such as charging and transporting filial piety, **, development, image transfer, fixing, removal and image removal.

The whole laser printing process is made up of "charging" action, first the drum is filled with negative charge or positive charge, the grating bitmap image data in the print controller is converted into the laser beam information of the laser scanner, and the drum is "**" through the reflection prism, and the surface of the drum is represented by a positive charge and the printed image is exactly the same image information, and the toner particles in the toner cartridge are adsorbed to form the toner image on the surface of the drum.

The printing paper is filled with a negative charge by a charging unit before contacting with the photoreceptor drum, and when the printing paper walks through the photoreceptor drum, the toner image of the photosensitive drum is transferred to the printing paper because the positive and negative charges attract each other.