JPS62144178A - Printer device - Google Patents

Abstract

PURPOSE:To omit the flash fixing processing which is required for an electrostatic printing plate generation in a conventional method, by constituting a print picture image forming means with a printing means which can form directly a fixed image on a photosensitive layer based on a proper picture signal. CONSTITUTION:A thermal head printer 9 is provided in the lengthwise direction of a scroll drum 4 and consists of a thermal head 12 pressed to the outside peripheral surface of the drum 4, a supply roll 14 which supplies a transfer sheet 13 where an insulating themosensitive ink layer is formed to a position between the thermal head 12 and the scroll drum 4, and a take-up roll 15 which takes up it. The thermal head 12 is connected to a picture reading part 17 arranged under a platen 16, and heating resistors provided in the thermal head 12 generate heat selectively based on the electric signal outputted from the reading part 17, and the thermosensitive ink is transferred to a photosensitive paper 1 on the scroll drum 4 to form directly an insulating print image.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention is directed to the use of an electrostatic printing plate on which a print image composed of an insulating toner or an electrically conductive toner is fixed to repeatedly obtain printed matter. The present invention relates to printer devices, and particularly relates to improvements to printer devices that can speed up printing.

[Prior Art] As a conventional printer device of this type, the one shown in FIG. 2 is known.

This device consists of a scroll drum (b) that is placed inside the device body (a) and rotates in the direction of the arrow; A supply roller (d) for carrying out the photosensitive sheets 1 to (C) to be wound around the surface, a take-up roller (e) for winding up the sheets, and slots provided along the circumference of the scroll drum (b). Image writing section (f), charging corotron (Q), full exposure lamp (h), developing/cleaning device (i), transfer/discharging corotron (j), peeling belt (
The main parts thereof are composed of a fixing device (1) and a fixing device (1) for plate making. In FIG. 2, (m) and (m) indicate a paper feed cassette, (n) a paper conveyance belt, and (0) a fixing device, respectively.

And in order to use this device to obtain a single copy, i.e., a printed matter, from a dissimilar original, an operating button (not shown) is pressed.
After setting this device to copy mode by operating , place the original (Q
) is read by the image reading section (r), and the signal is output to the latent image loading section (f>), which writes the charged corotron (charged at l). The latent image of the original m (l) is written on the photosensitive sheet (C), which is then developed with toner by the developing and cleaning device (i), and this toner image is transferred to the sheet fed from the paper feed cassette (m). The above-mentioned scroll drum (b) rotates once after copying is completed, and during that time the above-mentioned The photosensitive sheet (C) is configured to be statically neutralized by a transfer and static elimination corotron (j) and a full-surface exposure lamp (h), and cleaned by a development and cleaning device (i) before being used for the next copy. .

On the other hand, in order to obtain a large number of copies, that is, printed matter, from the same type of original, first operate the above operation button to enter the retention mode, and then first immerse the original (q) on the photosensitive sheet (C) using the same process as in the copy mode. An image is written, and this is developed using the developing/cleaning device (i) to form a printed image of insulating toner or conductive toner, and this image is fixed by the fixing device for plate making (1) to form an electrostatic printing plate. This electrostatic printing plate was then charged with the above-mentioned charged corotron (g).
[See Figure 3 (A)], and the entire surface exposure lamp (
h) to expose the conductive part (1) and the insulating part (U
) [see Fig. 3 (B)], this latent image is developed with toner by the above-mentioned developing and cleaning device (i) [see Fig. 3 (C)], and this toner is transferred to the above-mentioned transfer. It is transferred to the paper (S) by a corotron ('') that also serves as a charge remover [3rd
Refer to Figure (D)], and this is fixed by the fixing device (0) to obtain a copy, and the above steps are as follows: charging process of electrostatic printing plate → entire surface exposure process → toner development process → transfer process → fixing By repeating the process, a large number of copies are continuously obtained. After copying multiple copies,
The take-up roll (e) in the scroll drum (b) rotates to take up the photosensitive sheet (C), which is the electrostatic printing plate, and the new photosensitive sheet (C) is placed on the scroll drum (b).
) is configured to be supplied. Furthermore, although FIG. 3 shows an electrostatic printing plate on which a printed image is formed using insulating toner, if the image is formed using conductive toner, the conductive portion and the insulating portion are separated in the charging process. Since a latent image consisting of is directly formed, the above-mentioned entire surface exposure step is not necessary.

[Problems to be solved by the invention] However, in this type of apparatus, the above-mentioned plate-making fixing device (
As 1), a flash fixing device is conventionally used. If you use an oven-type fixing device, there is a risk of fire, while if you use a roller-type fixing device that uses a heated roller, the insulating toner or conductive toner will be crushed during fixing, making the image unclear. Moreover, a member for preventing offset is also required, which has the drawback of taking up a large amount of dedicated space. Therefore, as shown in Figure 2, a flash fixing device is used as the fixing device (1) for plate making, but when this fixing device is used, the photosensitive layer of the photosensitive sheet (C) is exposed to light due to strong light irradiation during fixing. There were problems in that it deteriorated and its charging properties deteriorated.

For this reason, the conventional apparatus, after creating an electrostatic printing plate, rotates the scroll drum (b) multiple times while applying the charging corotron (CI) to charge the printing plate and restore its charging property. A refresh cycle is required, and a waiting time of about 30 seconds to 1 minute is required from the time the printing plate is created until the printing process begins, which leads to problems such as a lack of promptness and a slow printing speed. Ta.

[Means for Solving the Problems] The present invention has been made by focusing on the above-mentioned problems, and its problem is to reduce the waiting time from the creation of an electrostatic printing plate to the start of the printing process. The purpose of the present invention is to provide a printer device with excellent speed that does not require .

That is, the present invention provides an electrostatic printing plate by fixing a print image composed of an insulating toner or a conductive toner to the photosensitive layer of a carrier provided with a photoconductive photosensitive layer, and charging this plate. , if necessary, the entire surface of the plate is exposed to light to form a latent image consisting of a conductive part and an insulating part, this latent image is developed with toner, and this toner is transferred from the plate to a recording medium to repeatedly print. The printer apparatus is characterized in that the image forming means for the printed image is constituted by a printing means capable of directly forming a fixed image on the photosensitive layer based on an appropriate image signal.

Here, the above-mentioned printing means of the present invention includes a recording head that operates based on an appropriate image signal, and a sheet supply section that supplies a transfer sheet to this recording head. Transfer-type thermal printers and pressure-sensitive printers that selectively transfer a pressure ink layer onto the photosensitive layer to directly form a printed image can be used, and inkjet printers that use quick-drying ink can also be used. can do.

[Operation] The present invention operates as follows. That is, in the printer device of the present invention, since the image forming means for the above-mentioned print image is constituted by a printing means capable of directly forming a fixed image on the above-mentioned photosensitive layer based on an appropriate image signal, when producing an electrostatic printing plate, There is no need to perform the above-mentioned flash fixing process.

Therefore, photodeterioration of the photosensitive layer does not occur and a refresh cycle becomes unnecessary, so printing can be performed immediately after the printing plate is created, and printing speed can be increased.

``Example'' Hereinafter, an example of the present invention will be described in detail.The printer device of the present invention, like the conventional device, has a supply roller (2) for zinc oxide photosensitive paper (1) and A scroll drum (4) equipped with a take-up roller (3), a latent image writing section (5) provided along the periphery of this drum (4), a charging roller (6), and an entire surface exposed. lamp(
7) The main parts are composed of a cleaning device (8), a thermal head printer (9), a transfer and neutralizing roller (10), and a peeling belt (11).

The thermal head printer (9) is provided along the length of the scroll drum (4), and includes a thermal head (12) placed in pressure contact with the outer peripheral surface of the scroll drum (4), and an insulating heat-sensitive ink layer formed thereon. Transfer the transferred sheet (13) to the thermal head (12) and the scroll drum (4).
The thermal head (12) is composed of a supply roller (14) for supplying to the Eail and a take-up roller (15) for winding it up. ) A heat-generating resistor (not shown) provided in the thermal head (12) is formed so that a nail (not shown) selectively generates heat based on an electric signal output from a lever reader (17). Thermal ink is transferred to the photosensitive paper (1) on the floor drum (4) to directly form an insulating print image. In Figure 1, (18) (18) indicates the paper feed cassette, (19) indicates the paper conveyance bell 1~, and (20) indicates the paper feed cassette.
indicates a fixing device.

In this device, J
3 and directly forms an insulating print image on the photosensitive paper (1) on the scroll drum (4) using a thermal head printer (12) to create an electrostatic printing plate, which eliminates the need for a conventional flash. Since fixing processing is no longer necessary, the refresh cycle described above can be omitted.

Therefore, printing can be performed immediately after the printing plate is created, so printing speed can be increased, and since the photosensitive layer does not undergo photodeterioration, the durability of the printing plate can also be increased.

In addition, in the copy mode, a latent image is formed on the photosensitive paper (1) by the latent image writing section (5) as in the conventional apparatus,
Printed matter is then obtained through normal copy processing.

Here, in the apparatus according to this embodiment, a thermal head printer (9) is used as the printing means, but the present invention is not limited to this configuration.
A transfer type pressure-sensitive printer using a transfer sheet on which a conductive or insulating pressure-sensitive ink layer is formed may be used, or an inkjet printer or the like may be used, and the configuration thereof is arbitrary.

[Effects of the Invention] As described above, in the printer device of the present invention, the image forming means for the printed image is constituted by a printing means capable of directly forming a fixed image on the photosensitive layer based on an appropriate image signal. , it is possible to omit the flash fixing process conventionally required when producing an electrostatic printing plate.

Therefore, it is possible to prevent photodeterioration of the photosensitive layer and eliminate the need for a refresh cycle, so printing can be performed immediately after the printing plate is created, which has the effect of speeding up printing.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the present invention, Fig. 1 is a side sectional view of a printer device of the present invention, Fig. 2 is a side sectional view of a conventional printer device, and Fig. 3 shows the printing process. An explanatory diagram is shown for each. [Description of symbols] (1)... Zinc oxide photosensitive paper (2) (14)... Supply roller (3) (15)... Winding roller (4)... Scroll drum (5)...・Latent image writing section (6)...Charging corotron (7)...Full surface exposure lamp (8)...Developer and cleaning device (9)...Thermal head printer (10)...Transfer and static elimination Corotron (11)... Peeling belt (12)... Thermal head (13)... Transfer sheet (16)... Platen (17)... Image reading section (18)... Paper feed cassette (19) Paper conveyance belt (20) Fuser patent Applicant Fuji Xerox Co., Ltd. Agent Patent attorney Tomohiro Nakamura (2 others) Figure 3

Claims (4)

[Claims] (1) In the photosensitive layer of the carrier comprising a photoconductive photosensitive layer,
A print image composed of insulating toner or conductive toner is fixed to form an electrostatic printing plate, this plate is charged, and the entire surface of the plate is exposed to light as necessary to form a latent image consisting of conductive and insulating parts. In a printer device that forms a latent image, develops this latent image with toner, and transfers this toner from the plate to a recording medium to repeatedly obtain printed matter, the image forming means for the printed image appropriately converts the image signal into an image signal. 1. A printer device comprising a printing means capable of directly forming a fixed image on the photosensitive layer based on the photosensitive layer. (2) The printer device according to claim 1, wherein the printing means is a transfer type thermal printer. (3) The printer device according to claim 1, wherein the printing means is a transfer type pressure-sensitive printer. (4) The printer device according to claim 1, wherein the printing means is an inkjet printer.