JPS58154856A - Color copying device - Google Patents

Abstract

PURPOSE:To perform color copying operation successively at a higher speed by providing processes for different colors, dividing a projection beam path through optical elements, and irradiating photoconductive screen belts with pieces of beam flux in respective extracted colors and forming latent images in the different colors at the same time. CONSTITUTION:Through an image-forming lens 105, partially transmissive mirrors 106-108, and a total reflecting mirror 109 provided behind a mirror 103, the projection beam path is divided for partial pieces 110-113 of beam flux, and B, G, R, and ND color filters 114-117 are provided for the respective pieces of beam flux to separate the beam into beams in four different colors. Then, the photoconductive screen belts 118-121 of the processes by the colors are irradiated with the four different color beams to form the electrostatic latent images in the different colors at the same time; and they are transferred to corresponding endless belts 130-133, developed, and transferred to a form at transferring parts 144-147. Thus, about 185 color copies are obtained successively in every minute.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a photographic machine 4 apparatus for making color copies.

In the known color copying apparatus, an original is copied by connecting different color filters in between, and the individual extraction forces are applied to the copy paper one after another after the development of an electrostatic flI image of the extraction color. Transferred and subsequently fixed. Transcription I! ii In order to retain the individual color records, the copy paper is conventionally pressed firmly against a rotating drum and removed from the drum only after all of the oaks have been transferred in color. Creating multiple copies is expensive and time consuming.

It is an object of the present invention to indicate a copying device that allows multiple color copies to be made in rapid succession.

According to the invention, one process station is provided for each extraction force 2-, so that electrostatic latent images of the individual extraction colors are formed and developed simultaneously. As a result, even if TF 4-color copying is performed, at least 4
The amount of covey produced can be maintained twice as much. Furthermore,
The apparatus according to the invention is designed as a four-color copying apparatus, since it is possible to use the known process parts known from the production of black-and-white copies, which in any case already make it possible to produce copies in rapid succession. In this case, a copy output of 185 sheets per minute is achieved. It is convenient for the copy paper to pass through the individual process sections successively in time. In the case of this device, in order to keep the record on the copy paper during the transfer of each extracted color, the process section is equipped with a measuring device and a control device to suitably control the transfer point of each force 2-. There is. The measuring device and the control device of the present invention are useful if a so-called one skip occurs, that is, a forward jump or a backward jump.Further details of the invention can be learned from the examples and description thereof.

This publication describes an exemplary embodiment of the present invention.

In the figure, an original 102 is placed on a glass plate 100. Exposure device 170 and two movable mirrors 10
1 and 103, the document is scanned in a band-like manner. Mirrors 101, 103 are now moved in direction 3 of arrow 104 to positions 101', 103'. Mirror 101 adjusts the length of the optical path, i? -Moves at a speed of 2ftk of 103. An imaging lens 105 is provided behind the mirrors 101 and 103. Behind the imaging lens 105 are partially transmitting mirrors 106 , 107 .

108 and a full anti-puller 109 are provided.

If mirror 106 is about 2 times stronger than F'i
The mirror 107 reflects approximately 3 of the intensity of the light that hits it.
31/3%, <2-108 is about 50% of the intensity of the light, and the mirror 109 reflects about 100% of the intensity of the light that hits it, so the part with the same intensity of light is A bundle of rays 110.111.112.113 is obtained.

This partial light-come 110, 111, 112, 113
are provided with blue, green, red, and ND color filters 114 , 115 , 116 , 117 so as to correspond to each partial ray, respectively corona 122 .
11) 11
An electrostatic latent image of the extracted color is created on 8 , 119 , 120 , 121 . This image is formed by the coronas 126, 127, 128, 129, and the corresponding endless insulating belts 130, 131, 132, 133, respectively.
onto which the electrostatic II&image of each extracted color is then stopped.

The direction of movement of the screen belt is indicated by arrows 134 and 135 and coincides with the scanning direction 104 of the encased document. Each insulation belt is yellow.

Magenta, cyan, black toner containers 136.137°1
38, 139 and Tadaki Roller Ro 0.141.14
There is a desk *St* consisting of 21143. Toner storage troughs 136-139 fall onto magnetic rollers 140-143, with respective storage containers being provided on top of each of the corresponding magnetic rollers.

Insulating belts 130 to 13 that each person's magnetic roller corresponds to
Sprinkle color toner corresponding to each skin on B, and then apply visible color 1iii of each extracted color on the insulating belt.
'/a occurs.

If black toner is provided in container 139 as the fourth color, color filter 117 may be omitted.

I can do it. Note that this black color may be provided depending on the necessity.

) Knee tw image is & photo * 144.145.146.
147, Corona 148.149.15
0, 151 onto copy paper passing in the direction of arrow 152. This copy paper is pulled out from the weight cutter 153. Transport bell) 1
54 Copy paper is passed between coronas 151-148 and insulating bell) 133-1300 to transfer zone 147
~144 area.

In this itt, each extracted color cyan, magenta,
Since the transfer of the individual color powders of yellow takes place on the copy paper one after the other in time, the copy paper must be coordinated with the insulating belt acting at the time as each next oh*m is reached. Therefore, the correct recorded color is transferred onto the copy paper. Adjust unregulated measuring and control equipment.

In this way, the running copy paper can pass to locations 147-144 in equal proportions.

The copy vapor goes straight along the transfer section to the fixing device 1.
60 is passed and conveyed is one effect.

Fusing device 160 is a pressure fusing device consisting of two rollers that press against each other and between which the copy paper with the individual extracted color powder-1 passes.

This fixing device 160 is provided at a distance behind the transfer section 144 after I&. This is because the pressure fuser tends to deflect the incoming copy paper away from its path, and such deflection can be caused by force if the spacing between the fuser and the final transfer station is not large enough. 2-This is because one tatami area is given for the transfer of the painting, especially in the last transfer section.Q The completed copy exits the device in the direction of arrow 161, is struck, and placed in a storage basket.

The original is created by an electrostatic residue that produces all the extracted colors, and finally, the extracted colors are simultaneously imaged onto an insulating belt applied to it, and at short intervals, the individual extracted By simply transferring the color image onto the copy paper, multiple color copies can be made in very rapid succession in time.

8 (1: A device can make 185 & copies every minute.

At the hip, the original fee is only one latent image formation to create multiple color copies. This is because the electrostatic potential generated on the screen belt can be transferred onto the insulating belt up to 100 times.

At this time, the screen belt and the absolute belt rotate extremely rc*<<, regardless of the horizontal scanning speed.

Because of this rapid rotation, the screen belt and the insulating belt run parallel to each other in this region so that good image transfer occurs in the region of the transfer coronas 126-129. In addition, in the copy paper (-) transfer portions 144 to 147, if the insulating belt and the copy paper are made flat with each other, a relatively large transfer distance can be maintained.

The running direction of the screen belt and the insulating belt is practically perpendicular. This makes it possible for the existing device consisting of the toner container and the magnetic roller to be located close to the screen belt and the insulating belt, thus saving space. You can save money. That is, even though there are four process sections, they may be drum-shaped.

[Brief explanation of the drawing]

The figure shows a cross-sectional view of a color duplicating device illustrating one embodiment of the invention. In the figure, 102 is a manuscript. 114 and 115 as well as 116 and 117 are Kan-type filters. 118, 119 and 120 and 121 indicate screen photoreceptors. Applicant Canon Co., Ltd.

Claims (1)

[Claims] 1. *The original is exposed to light with a color filter inserted between them, and in the processing section, the electrostatic potential of the extracted colors is exposed, transferred to the copy paper, and fixed there, producing multicolor colors. In a color reproduction device for making copies, a separate process section is provided for each extracted color, optical elements separate the projected light path, and a separate processing section is provided for each extracted color. A beam of light is applied, and each of the above-mentioned process sections has a photoconductor screen photoreceptor,
The electrostatic charge sm of the extracted color is formed thereon, and the electrostatic charge 1 of the photoreceptor is repeatedly transferred by the corona. A color copying machine, characterized in that each insulating material is associated with a dusting device with a corresponding color toner, and the paper passes through the insulating material of the individual process section.