How to photograph papers and documents?

How to photograph papers and documents?

Called XEROGRAPHY photocopy process balziiroghravi and called allketrostatiket dry printing photographic process was invented by Chester F. Carlson world in 1937 and became used in 1950, the photographic process a paper document on the glass surface of the machine and then set the options you want, such as the number of copies required, size, opacity, and then press the Start button. What happens inside the imaging machine after this moment is what we will try to explain it.

Support the idea of machine work & the basics of static electricity electrostatic additional shipments with positive or negative on the article but without freedom of movement, as we know, that the positive charge attracts negative charge and vice versa, as we have stated previously that the stator consists on the body and not moving, for example if you knead the pieces of wool balloon the balloon becomes the ability to glue wall wall, for example, because the process of rubbing the balloon was added for static charge.

Using the same principle documents Copier with a machine called the drum light-sensitive material called photoconductive, shipped shipments static as in the balloon and black powder is also called cylinder charged toner can attract black powder granules.

The properties of the cylinder and the black powder to complete the process of photography.

1. charging for specific parts of the cylinder, so that the only parts that attract black powder granules, the document image to be filmed on the surface of the cylinder in the form of static charge (electrostatic) on the surface of the roller

2. move the black granules purdah shipped on the surface of the cylinder that are document image to be filmed and then black powder is transferred to the surface of the white paper.

3. install granulated black powder on the surface of the paper with heat as this heat-sensitive grains.

The imaging process

Article making the cylinder drum are materials connect optical photoconductive and more precisely the photographic process is as follows:

1. charging the surface of the cylinder with a positive charge.

2. pass the light shining on the surface of the paper to be photographed and placed on the glass surface of the imaging machine, light is reflected from the white areas of the surface of the paper and come up against the roller drum installed below

3. collide when photons of light reflected from the white areas with surface roller free electrons from the atoms of the surface of the cylinder because it is connect optical photoconductive, السودء areas on the surface of the paper such as text and images is not reflected by the light which makes the surface of the cylinder corresponds to the black areas are regions fraught with a positive charge.

4. disseminate accurate black powder granules called the toner is negative charge, black powder granules are attracted to positive charge on the cylinder and a picture.

5. pass the white paper is a positive charge on the drum to attract black powder granules.

6. the paper is heated by the hot surface of the pass stick black powder granules with the surface of the paper.

When the imaging machine shed a bright light on the paper to be photographed, a green color on the cylinder drum with a positive charge, the reflected light from white areas on the paper to be photographed when give to drink you on the cylinder to release electrons tied positive shipments leaving the cylinder with a positive charge is the black areas on the paper to be photographed, the positive charges remaining on the disc and the image to attract toner powder granules with a negative charge to be ready to stick the white paper which the image appears.

Inside the imaging machine

Copier has many parts to complete its work and the main parts are:

* Cylinder composed of light-sensitive material.

* Corona wires

* Lamp light and lenses

* Granulated black powder

* Convection heater

Cylinder composed of light-sensitive Photoreceptor Drum

Drum roller is the main part of the copier and consists of a metal cylinder covered with a layer of light-sensitive material photoconductive. These light-sensitive layer is a substance of semiconductors such as Silicon or germanium, selenium. These materials have the capacity to deliver electricity when exposed to light and the buffer in the dark. Thus, the roller drum are soundproof electricity in the dark but when falling off photons of light to light-sensitive material it sucks energy photons and liberated electrons making it conductive to electricity. The electrons to the positive charge equation consisting on the cylinder to leave areas that were exposed to light is a positive charge to form the image.

Corona Corona wire Wires

Copier work it is necessary to expose the surface of the roller and the paper for shipment to a positive charge at the outset. This process is carried out through wire corona wires koruna where these wires with high voltage and then related to its shipment of roller-cation.

Wires used to ship roller koruna are sensitive to light and the white paper with a positive charge

Projector lamp and Lamp and lenses Lenses

Working light bulb to provide adequate light is reflected on the surface of the paper to be photographed and the image of the document on the cylinder. The reflected light on the white parts of the original sheet to be photographed while not reflected something of the black areas (text and images).

Wipe the surface of the paper, bright light of an appropriate light source when the source moves to wipe the sheet in the form of package minutes of light the lamp moving with mirror work on guiding light reflected from paper to a collage of fall on the cylinder that moves as well. The lentils