JPS59144271A - Transfer type polychromatic recording device - Google Patents

Abstract

PURPOSE:To reset the lengthwise restriction of recording paper in a device which performs recording of proper size by forming a polychromatic toner image on an intermediate recording medium and then transferring it to a recording form. CONSTITUTION:A high voltage is applied to a conductive layer to transfer toner images in respective colors formed successively on a photosensitive drum 1 to the circumferential flank of the cylindrical intermediate transfer medium 5a so that they overlap one another, color by color, thus forming a polychromatic toner image on the intermediate transfer medium 5a temporarily. Then, the recording paper 6a is attracted electrostatically by a transfer charger 12 and the recording paper 6a after the 1st formation of the polychromatic toner image is moved again as shown by an arrow 6b to transfer the image. At this time, the front end of the recording paper 6a' having the polychromatic toner image reaches a fixing device 9 to form a polychromatic fixed image and the paper is discharged. When a long-sized picture is recorded, the 3rd or 4-th polychromatic toner image, etc. is formed on the medium 5a and only transferred to the recording paper 6a' successively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer type multicolor recording device, and more particularly to a device that enables multicolor recording of any suitable size in the longitudinal direction, which is the running direction of recording paper.

First, a conventional transfer type multicolor recording apparatus will be described using an example of a xerography type recording method. FIG. 1 is a block diagram showing an example of a conventional transfer type multicolor recording apparatus.

The year is written on the surface of the photosensitive drum l, which is an intermediate recording medium.

A selenium thread photosensitive layer is formed and uniformly charged by a corona discharger 2. As a second step, a laser light source 3 (thus,
The uniformly charged photosensitive drum 1 is exposed to light to form a magenta electrostatic latent image. As a third step, the M-color developer 4 containing magenta toner (hereinafter referred to as M-color toner) having a charge of opposite polarity to the magenta electrostatic latent image is used to convert the M-color toner into the M-color toner using electrostatic force. The above-mentioned maze/red color electrostatic latent image (is attracted and developed. In the fourth step, the recording paper 6a cut to a certain size from the recording paper supply tray 6 is transferred to the recording paper 6a made of urethane resin whose surface has been treated to be conductive. The recording paper 6a is held by the roll 5, and an electric charge having the opposite polarity to the M color toner is applied to the recording paper 6a.
Transfer to.

Next, the surface of the photosensitive drum 1 is cleaned by a cleaner 10, and the first to fourth steps are exposed using a laser light source 3f modulated with electrical signals of yellow and cyan, respectively, to produce yellow light.

The toner images developed by the 1-color developer 7 and the 0-color developer 81 containing cyan toner (hereinafter referred to as Y color toner and C color toner) are transferred to M color toner first. The images are sequentially superimposed and transferred onto the recording paper 6a.

As a fifth step, the recording paper 6a on which the three-color toner images have been transferred is heated by the fixing device 9. By the above heating, the three types of toners are mixed in color and fused to the recording paper 6a, forming a multicolor fixed image. The recording paper 6a on which the multicolor fixed image has been formed is discharged to the outside by a conveyor belt 11 or the like.

As stated above, in the conventional transfer type multicolor recording device, since a multicolor toner image is formed on the recording paper 6a while being wrapped around the circumferential side of the transfer roll 5, the recording paper 6a
There is a drawback that the length in the longitudinal direction cannot be made larger than the circumferential length of the transfer roll 5.

The present invention was made in view of the above-mentioned circumstances.
The purpose is to provide a transfer type multicolor recording device that has no restrictions in the longitudinal direction of recording paper.

Hereinafter, the present invention will be explained with reference to the drawings of an embodiment.

FIG. 2 is a block diagram showing an embodiment of a transfer type multicolor recording apparatus according to the present invention, in which parts given the same reference numerals as those in FIG. 1 indicate the same functional parts. The recording method of the apparatus according to this embodiment is an example of a xerographic method.

The feature of the apparatus according to this embodiment is that instead of transferring the toner image formed on the photoreceptor drum to recording paper, a separate intermediate transfer medium is provided, and the toner image on the photoreceptor drum is transferred to the intermediate transfer medium. are sequentially transferred for each color to form a multicolor toner image on the intermediate transfer medium, and then the multicolor toner image on the intermediate transfer medium is transferred to recording paper, and this is repeated multiple times as necessary. By repeating the transfer so as to contact the portion of the recording paper where the previous transfer was completed, it is possible to form an image without any restriction in one paper feeding direction.

This will be explained in detail below with reference to FIG.

The recording process from FIG. 1 to the third step is the same as the conventional one described above. That is, the photosensitive drum 1 is uniformly charged with a corona discharger 2, and the uniformly charged photosensitive drum 1 is exposed to light by a laser light source 3 modulated by a magenta electric signal to form a magenta electrostatic latent image. After forming the electrostatic latent image, the latent image is developed with an M color toner having a charge opposite in polarity to the electrostatic latent image by the M hue developing device 4.

Next, as a fourth step, the circumference of a cylindrical intermediate transfer medium 5a is constructed of a dielectric layer on the outside and a conductive layer on the inside in contact with the dielectric layer, and has a structure in which a high voltage can be applied to the conductive layer. The M color toner image formed sequentially on the photosensitive drum 1 is sequentially electrostatically adhered to the side surface by applying a high voltage to the conductive layer.

On the other hand, before the transfer of the M color toner image is completed, the surface of the photosensitive drum l in the area where the transfer has been completed is sequentially subjected to static neutralization and removal of residual toner by a cleaner 10 or the like.
The surface of the photosensitive drum l is uniformly charged again by the corona discharger 2 from the cleaned/cleaned area, and the uniformly charged photosensitive drum l is exposed to laser light 3 modulated by a yellow electric signal. , after forming a yellow electrostatic latent image, it is developed by a one-color developer 7 with seven-color toner having a load of opposite polarity to that of the electrostatic latent image.

Next, the Y color toner images sequentially formed on the surface of the photosensitive drum l are transferred to the intermediate transfer medium on which the M color toner image has already been formed.
Electrostatically adhere to (a) one after another.

Similarly, the C0 color developer 8 is placed on the surface of the photosensitive drum 1.
By forming a C color toner image, and electrostatically adhering this C color toner image sequentially to the M color and Y color toner images previously formed on the intermediate transfer medium 5a, the intermediate transfer medium 5a A multicolor toner image is formed thereon.

As a fifth step, while moving the recording paper 6/a previously drawn out from the recording paper roll 6' in the direction of the arrow 6'b, the multicolor toner image formed on the intermediate transfer medium 5a is sequentially transferred to the transfer charger 12. According to the recording paper 6'a1,
Transfer by electrostatic attraction.

All the multicolor toner images on the intermediate transfer medium 5a are transferred to the recording paper 6.
When the transfer to /a is completed, the movement of the recording paper 6'a is stopped. During this time, the intermediate transfer medium 5a on which the multicolor toner image has been transferred is sequentially cleaned by a cleaner 10a or the like.

The photosensitive drum 1 is also cleaned by the cleaner 10, and the cleaned portion is uniformly charged by the corona discharger 2 for the next image formation, and then colored magenta by the laser light source 3 modulated by the magenta electric signal. The process of forming six latent images, forming an M color toner image by the M color developing device 4, and further transferring the M color toner image sequentially formed on the photosensitive drum 1 to the intermediate transfer medium 5a is the process of forming Y color and C color toner images. The toner is repeatedly applied to the intermediate transfer medium 5a (this second
When the first multicolor toner image is formed, the recording paper 6'a, on which the first multicolor toner image has been formed, is moved again in the direction of the arrow 6'b, while the intermediate transfer medium 5a The second multicolor toner image formed on the top is transferred to transfer charger 1.
2, the toner images are sequentially transferred onto the recording paper 6/a so as to be in contact with the first multicolor toner image.

During this time, the leading edge of the recording paper 6/a on which the multicolor toner image has been formed reaches the fixing device 91, and the multicolor toner image is sequentially fused to the recording paper 6'a by irradiation with a strobe or the like, forming a multicolor fixed image. is formed, and is then sequentially discharged to the outside by a conveyor belt) υ, etc.

If you want to record an even longer image, do the same for the 3rd and 4th time.
It is sufficient to form the multicolor toner image for the first time on the intermediate transfer medium 5a and sequentially transfer it to the recording paper S/a.

Furthermore, since the final image can be made to have any size, it is possible to form a multicolor fixed image of any size in the longitudinal direction of the recording paper 6/a.

In the detailed explanation of the present invention, an example of the xerographic recording method is used, but a dielectric drum is used in place of the photosensitive drum 1 and the laser light source 3, and an electrostatic latent image is formed by a multi-needle electrostatic recording head. It is obvious that the present invention can also be applied to a transfer type electrostatic recording method in which a magnetic head is used to form a magnetic latent image on a magnetic drum, and a magnetography method in which a magnetic latent image is formed on a magnetic drum and developed with magnetic toner.

° As described above, according to the present invention, since the intermediate recording medium, intermediate transfer medium, and recording paper are moved in one direction, the machine groove is simple and the intermediate transfer medium can easily achieve dimensional accuracy compared to recording paper. Since a multicolor toner image is formed on the recording paper and then transferred to the recording paper, a high quality long one-sided image with little color shift can be easily obtained by combining the conventional techniques, so the effect is excellent.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of a conventional transfer type multicolor recording apparatus, and FIG. 2 is a block diagram showing an embodiment of the present invention. l-...Photosensitive drum, 2...Corona discharger, 3...
...Laser light source, 4...Developer for M color, 5
...Transfer roll, 5a...Intermediate transfer medium, 6
...Recording paper supply tray, 6'...Recording paper roll, 5a, 5'a...Recording paper, 7...Y
Hue developer, 8...Developer for C color, 9...
・Fuser, 10, 10a...Cleaner, 11...
...Conveyor belt, 12...Transfer charger. Patent applicant Toyo Denki Seizo Co., Ltd. Representative Atsushi Doi

Claims (1)

[Claims] A transfer type multicolor recording device 5 forms a toner image on an intermediate recording medium and transfers the toner image to a recording sheet to form a fixed multicolor image on the recording sheet. A multicolor toner image is formed on the intermediate transfer medium by providing a medium and repeating the operation of transferring the toner image formed on the intermediate recording medium one color at a time to the intermediate transfer medium multiple times for each type of toner. At the same time, the multicolor toner image is transferred onto the recording sheet, and the transfer process of forming the multicolor toner image on the recording sheet is repeated an arbitrary number of times in order to suitably move the recording sheet in the feeding direction. 1. A transfer type multicolor recording device, characterized in that it records a multicolor fixed image having a length of .