JPS5865454A - Image forming device - Google Patents

Abstract

PURPOSE:To obtain synthesized pictures easily by forming the latent images corresponding to the light information differing successively on an image carrier, and transferring the same successively with two developing means. CONSTITUTION:The 1st picture information is applied from an optical path 3 onto a drum 1 which is electrostatically charged with an electrostatic charger 2, and the 1st latent image is formed in an area P1. The 1st latent image is developed by the 1st developing means 4 and is turned to a sensible image as the 1st picture. On the other hand, a copying machine 5 is fed by a feed roller 6 via a timing roller 7 up to the position S1 of the 1st transfer position. The 1st picture is transferred on a transfer material 5. The light image corresponding to the 2nd picture is irradiated to the area P2 spaced at a distance D from the area P1 on a photosensitive drum 1 to form the 2nd latent image. This area P2 is developed by arriving at the position of the 2nd developing means 9 in accordance with the rotation of the drum 1, and is turned to a sensible image as the 2nd picture.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image forming apparatus, and more particularly, to an image forming apparatus capable of producing good images in accordance with different lighting conditions.

Conventionally, in an image forming device that synthesizes images according to different optical information, such as a copying device, the transfer material is held and circulated in order to transfer the KJI image onto the bone transfer material by weight. A configuration with a moving mechanism was common. However, the above-mentioned transfer mechanism is complicated and becomes an obstacle to miniaturization of the image forming apparatus itself.

The present invention has been made in view of the above points, and an object thereof is to provide a simple and excellent opening device.

The device of the present invention includes a II carrier that moves endlessly;
a means for layering a latent layer on the am carrier according to the optical information; a bsil image means for providing a predetermined color agent; and a position of the image carrier different from the first image carrier. The second time to buy the agent! A Marugame 1 transfer means, a second transfer means provided behind the second developing means, and a running transfer are provided between the ll image means and the 1,111 snow developing means, and the first transfer means is used for transfer. A means for conveying the material to the second transfer position is referred to as a buttock mold.

ε Hereinafter, details of the present invention will be explained with reference to the drawings.

FIG. 1 is an explanatory diagram of a concrete image forming apparatus based on the present invention.

Reference numeral 1 denotes a photoreceptor drum, which has image forming areas P*-Pt for forming and supporting different 2110 m diameters in the figure.

Snow is a charger, 3 is an image irradiating device that provides image information to be formed on the photosensitive drum, and 4 is a first current means. Reference numeral 5 is a transfer transfer material housed in a cassette or the like, 6 is a feeding four, and 7 is a 1SL tie-making dart. S is a first transfer means, and 9 is a 21st image means. Io is the J1!1 conveyance guide that conveys the transfer material from the paper feed cassette to the first transfer position, 11. Im the second transport guy F, 1! is IR2
These are timing suits. 14 is a second transfer means, 15
1 is a conveying means, and 16 is a fixing means.

17 is a cleaning means for the photosensitive drum.

The operation of the first illustrated device will be explained below. The tenth image information is applied from the optical path 3 to the good/bad light drum l, which has been charged in advance by the charger 2, and the first m-th image is formed in the area P. The first latent image is developed by the first IA image means 4 and visualized as a first image. On the other hand, the transfer material 5 is fed by the feeding roller 6 via the swinging roller 7 and between the first conveyance guides 1o to the first transfer means position 8tt. A first image is transferred to the transfer material 5 by a corona discharger 8 provided as a first transfer means. Further, a corresponding light image is irradiated to form a second latent image. This second latent image also changes as the drum rotates.
It passes through the developing means 4 position, but at this time the 11th! The image means 4 is stopped in operation and, if necessary, is mechanically moved away from the drum to prevent it from acting on the surface of the photoreceptor drum.
-I'm bored. At the same time, the feed row 26 is not operated. Therefore, no new transfer material is fed to the second fm image in area P. Next, the second latent image forming area P*I
d. As the drum 1 rotates, it reaches the position of the second developing means 9, is developed, is visualized as a second image, and then rotates to the rear to form a second image.
The transfer section S is reached. At this time, the transfer material on which the first image has been transferred is sent to the second transfer means position 83 via the second timing roller 2, passing between the second conveyance guides 11.13. At this second transfer means position, synchronization is established with the second timing roller 12 so that the leading edge of the transfer material 17 matches the leading edge of the second image. Of course, the interval between the first and second image forming areas Pt-Pt is also suitably set to be synchronized.

That is, 8. The length on the drum circumference of and S is 8° and B
oo The length of the conveyance path of the transfer material at the threshold is t, 4r is the image engraving area length and the width of the transfer material is m, the circumferential speed of the drum is VD, and the conveyance mode of the transfer material is Vp. is L, (, Vn, Vp (VD=Vp) It is effective as a means for synchronization to change D using the relational expression. In other words, the timing of light image irradiation of the first image and the second image can be defined using the above relationship.

At the second transfer means position S, the fs2 image is transferred onto the transfer material 5, which already carries the first image, by the corona discharger 14 provided as the second transfer means. Next, the transfer material 5 after the transfer is separated from the drum L, is sent to the fixing means 16 by a conveyor [15], is fixed, and is discharged outside the machine.

By the above-described operation, the first and second images are multiple-transferred onto the transfer material 5, and a composite image is easily formed. Especially the 11th
Different colors OSS for i image means 4 and 317A my means 14
If you add the agent (for P4, black for the former and red for the latter), you can easily make multicolor copies. In particular, when a means based on electronically converted information such as a laser beam is used as the optical image irradiation means, it is effective because the information to be synthesized can be selected from a wide range.

FIG. 2 illustrates different implementation devices according to the invention. In the figure, members common to those in FIG. 1 are indicated by the same number. In FIG. 2, a second fixing means 18 is provided in the middle of the second conveyance guide section of the feeding apparatus O shown in FIG. 1.

That is, the transfer material to which the first image has been transferred is fixed with the transferred image prior to the next transfer, and then transferred to the second conveyance guide 13.
The image is sent to the second transfer section S through the path. Here, the fixing by the second fixing means does not need to be perfect, and it is sufficient that the image is not disturbed during movement of the transfer material. By fixing at the point of the second transfer in this way, disturbances in the transfer at the middle of the second transfer path (DL error, second transfer means position S) can be prevented and a high-quality multiple copy image can be obtained. It will be done.

As described above in detail in Gutaioka, the present invention is excellent in that a composite image can be easily obtained with a simple configuration.

[Brief explanation of drawings]

Figure 1 shows the original BAK-based concrete tsuba-er Il! Forming device explanatory diagram, FIG. 2 is a modified example device 1iil! based on the present invention! Ming diagram. -La, 7: first tying roller, 8: first transfer means,
9: Second developing means, 1G, first transport guide. Applicant: Canon Co., Ltd.

Claims (1)

[Claims] U) An endlessly movable image carrier; means for sequentially forming acid bodies on the image carrier according to different optical information; #l image means and said tml
a second developing means that supplies a developer to a position on the image carrier different from that of the developing means; The rattan 1 transfer means provided between the second transfer means, the Marugame 2 transfer means provided behind the 21A image means, and the transfer material subjected to transfer by the first transfer means to the second transfer means position. An image forming apparatus comprising: means for conveying; (741) The image forming apparatus according to the invention as set forth in claim 1, wherein the conveying means includes a heat fixing member.