JPH0221771A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To minimize the transfer charger ON time, to minimize the quantity of ozone generated attended with discharge and to attain long service life of a recording body by using a reproduced data stored in a page memory so as to discriminate the length of a received picture in the subscanning direction and to control the transfer charger ON time. CONSTITUTION:A means 25 discriminating the length of a received picture in the subscanning direction by using a reproduced data stored in a page memory 24 and a means 25 controlling the ON time of a transfer charger 27 transferring toner developed on a recording body based on the discriminated length onto the recording paper are provided. Since the transfer charger ON time is minimized in this way, the quantity of ozone generated attended with discharge, the damage given to a recording body is minimized and the long service life of the recording body is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a facsimile device, and particularly to a plain paper recording facsimile device using an electrophotographic method.

[Conventional technology]

Conventionally, in plain paper recording facsimile machines using electrophotography, in order to record received images at high speed, a page memory is provided, and the received image information (compressed data) is reproduced, and one page's worth of reproduced data is stored in the page memory. There are some that start recording after accumulating.

Furthermore, recording by the above-mentioned facsimile device uses a laser light source as a recording light source, and deflects the laser light by rotating a polygon mirror. An electrostatic latent image is formed on a photosensitive medium (drum or belt), and after development, it is transferred to plain paper.
This is done by becoming established.

- In the reception recording operation as described above, the ON time of the transfer charger for transferring the toner developed on the photosensitive medium to the recording paper is adjusted to the length in the sub-scanning direction of the paper size set in the device. was set. That is, the setting is 297+++++++ minutes when A4 is set, 3641 minutes when 84 is set, and A5. Similarly, for B5, the transfer charger is turned on for the length in the sub-scanning direction.

In addition, related technologies include the literature, written by Keiji Kubota:
"Facsimile and New Image Communication", Electronic Science Series 96
．． Sanpo Publishing + PP, 46-49 (1983).

[Problem that the invention attempts to solve]

In the above conventional technology, the transfer charger ON time is fixedly set according to the length of the paper size in the sub-scanning direction.
,) damages the recording medium (photosensitive medium), causing cracks on the surface of the recording medium. Also,
The generated ozone (O□) may have an adverse effect on the human body.

The purpose of the present invention is to solve these conventional problems, to provide a facsimile machine that can minimize the ON time of the transfer charger, minimize the amount of ozone generated due to discharge, and extend the life of the recording medium. It is about providing.

[Means to solve the problem]

In order to solve the above problems, a facsimile device of the present invention reproduces received image information (compressed data).

In an electrophotographic facsimile machine that starts recording after storing one page's worth of reproduced data in a page memory, means for determining the length of a received image in the sub-scanning direction based on the reproduced data stored in the page memory; A facsimile apparatus comprising means for controlling an ON time of a transfer charger for transferring toner developed on a recording medium to recording paper based on the determined length.

Further, the facsimile device of the present invention can receive image information (
The electrophotographic facsimile machine starts recording after reproducing the compressed data and storing one page's worth of reproduced data in the page memory. A means for determining the position of the printing section in the sub-scanning direction is provided, and the method corresponds to the determined position of the printing section.

It is characterized by turning on a transfer charger that transfers the toner developed on the recording medium to the recording paper.

[Effect]

In the present invention, the length of the received image in the sub-scanning direction is determined based on the reproduced data stored in the page memory, and the toner developed on the recording medium is transferred to the recording paper based on the determined length. The ON time of the transfer charger is controlled. In addition, means is provided for determining the position of the printed portion of the received image in the sub-scanning direction based on the reproduced data stored in the page memory, and a portion of the image developed on the recording medium is provided in accordance with the determined position of the printed portion. Turn on the transfer charger that transfers the l-ner onto the recording paper. With these, the transfer charger O
To minimize the N time, to minimize the amount of ozone generated due to discharge, and to extend the life of a recording medium.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

This embodiment will be explained by dividing it into a first embodiment and a second embodiment. (I) Figure 2 of the first embodiment is a cross-sectional structural diagram of a facsimile machine to which the present invention is applied. . This shows the cross-sectional structure of an electrophotographic facsimile machine that can record on plain paper.

In FIG. 2, reference numeral 1 denotes a scanner unit for reading the original document (image information) 3 to be transmitted, and reference numeral 2 denotes a plotter unit for recording the received image information on plain paper.

3 is a document, 4 is a lens, 5 is a CCD, 6 is a charger that applies a certain charge to the photoreceptor 10, and 7 is a laser beam 1
, 8 is a developing roller, 9 is a recording paper (plain paper), 10 is a photoreceptor (bell 1-shaped), 11 is a toner developed on the photoreceptor 10, which is transferred to the recording paper 9
12 is a fixing roller, 13 is a cleaning blade, 14 is a discharge lamp, 15 is a laser beam, and 16 is a toner. Hereinafter, the operation of the apparatus shown in FIG. 2 will be explained separately for the scanner section 1 and the plotter section 2.

In the scanner section 1, the yK document 3 is sent to the reading section a, and the lens 4 is used to form an image on the CCD 5, and the image is read as binary information.
0 is given a constant charge, and the charge is removed according to image information using a laser beam 15 generated by a laser generating unit 7, thereby forming an electrostatic latent image. This electrostatic latent image is developed by a developing roller 8 (1 henna 16
A transfer charger 11 transfers the image to the recording paper 9 that has been fed, and a fixing roller 12 fixes the image onto the recording sheet M9. The toner remaining on the photoreceptor 10 without being transferred is scraped off by a cleaning blade 13, and the remaining electrostatic latent image is further removed by a static elimination lamp 14.

FIG. 1 is a block diagram of a facsimile machine showing a first embodiment of the present invention. This is the scanner section 1 shown in FIG.
2 shows a block configuration for controlling the mechanism of the plotter section 2.

In FIG. 1, 21 is a modem that modulates and demodulates data;
22 is a memory for storing image information (compressed data), 23 is a data compression/reproduction circuit for compressing/reproducing data, 24 is a page memory for storing data for one page, and 25 is for controlling the entire device, that is, mechanical control and C that performs communication control
0PU, 26 is a scanner unit that reads the original 3, and 27 is a plotter unit that records the received image.6 The embodiment of the water bottle 1 is characterized by the reception operation, and the transmission operation is the same as the conventional one, so we will not explain it. This will be omitted, and only the reception operation will be described below.

First, analog image information sent via a telephone line is converted into digital data by the modem 21, and -
The data is stored in the memory 22. At this time, the 9-picture information is compressed data, and such a memory 22 is called an SAF memory. Next, the compressed data is sequentially retrieved from the SAF memory, reproduced by the data compression/reproduction circuit 23, and stored in the page memory 24 as raw image information.

While receiving this reproduced data (raw data), when one page is stored, the CPU 25 causes the plotter section 27 to start a series of recording operations, and recording is performed on the recording paper (plain paper) 9.

In the embodiment of the water bottle 1, the CPU 25 has a function of determining the length of the received image in the sub-scanning direction based on the reproduction data stored in the page memory 24, and a function of determining the length of the received image in the sub-scanning direction based on the determined length. It is characterized by the provision of a function to control the 08 hours of the transfer charger that transfers the developed toner onto the recording paper.

That is, when one page of reproduction data is stored in the page memory 24, the CPU 25 determines the length L of the image information in the sub-scanning direction, and the transfer charger 11 is adjusted according to the length L.
Set 08 hours. Here, the sub-scanning direction refers to the direction in which the recording paper 9 and the photoreceptor 10 are fed.

The writing start time by the laser beam 15 at point B in the second figure is taken as a reference 0, and the distance from the transfer start point C is BC=S (mm
), and the linear velocity of the photoreceptor 10 is v (on/5ee),
and transfer charger 1 after (see) = S/v
Just turn on 1.

For the subsequent ON time t2, let the opening width of the transfer charger 11 be W (m ).

t, (see) = (L + W)/v. Conventionally, t (see) is determined according to the length M (1III) of recording paper set in the device in the feeding direction
= (M+W)/v, which required extra transfer charge to exceed the length of one image in the sub-scanning direction.In contrast, in the first embodiment, only the minimum amount of time is required, so the photosensitive The lifespan of the recording medium can be extended.

(■), The device configuration, device operation, and control block of the second embodiment of the water bottle 2 are the same as those in FIG. 2 and FIG.
Reference will now be made to the embodiment of , and only the differences will be described. In the example of water bottle 2.

As a function of the CPU 25, the page memory 2 shown in FIG.
A function is provided to determine the position of the print area in the sub-scanning direction of the received image based on the reproduction data stored in 4, and the toner developed on the recording medium is transferred to the recording paper according to the determined position of the print area. The difference is that the transfer charger for transferring data is turned on.

Therefore, in the embodiment of Sui-Tei 2, when one page of playback data is stored in the page memory 24, the CPU
25 detects the position of the print part in the sub-scanning direction of the image information.

That is, as shown in FIG. 3, L (am) and M (wm) are detected from the image information data in the page memory 24. M here refers to the maximum width of the printed area.

This includes white parts.

Conventionally, the writing point by the laser beam 15 is B, the transfer charge start point is C, BC=S (no), the aperture width of the transfer charge 6 is W (rra), and the linear velocity of the photoreceptor 10 is v (n
wn/5ee), the timing chart was as shown in FIG. 4 after the photoreceptor was driven.

t, (see) = S / v, t2 (see) =
(N+W)/v Here, N (mm) is the length of the set recording paper 9 in the sub-scanning direction.

On the other hand, in the example of Mizui 2, t 1 (see) = (S + L) / v, t,
It is sufficient to set (see)=(M+W)/V. That is, whereas in the past, the transfer charger 11 was turned on over the entire length of the set recording paper 9 in the sub-scanning direction, in the embodiment of the Sui-Tei 2, the transfer charge is only applied to the portion corresponding to the print area M. is being applied. Thereby, the generation of ozone (◯,) can be suppressed to a minimum, and damage to the photoreceptor 10 can be reduced.

In this manner, in the first and second embodiments, the ON time of the transfer charger can be minimized, and the amount of ozone generated due to discharge can be minimized.

In addition, in the first and second embodiments described above, an example of an electrophotographic plain paper recording facsimile device has been described, but an electrostatic recording method plain paper recording facsimile device using a dielectric belt as a recording medium is also applicable. , the above-described embodiments can be similarly applied.

〔Effect of the invention〕

As explained above, according to the present invention, the ON time of the transfer charger is suppressed to the minimum, and therefore the amount of ozone (Ol) generated due to charge discharge is suppressed, and damage to the recording medium is minimized. It can extend the lifespan of the body. At the same time, it is possible to minimize the amount of ozone that is harmful to the human body.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a facsimile machine showing an embodiment of the present invention, FIG. 2 is a cross-sectional structural diagram of a facsimile machine to which the present invention is applied, and FIG. 3 is a diagram showing an example of image information data in a page memory. FIG. 4 is a timing chart 1 of the recording operation. 1: Scanner section, 2 Plotter section, 3: Original, 4: Lens, 5: CCD, 6: Precharger, 7: Laser generation unit, 8: Developing roller, 9: Recording paper (plain paper),
1o: Photoreceptor (belt-like), 11: Transfer charger,]
2: Fixing roller, 13: Cleaning blade, 14: Static elimination lamp, 15: Laser light, 16: Toner 21: Modem, 22: Memory, 23: Data compression/reproduction circuit, 2
4: Page memo 1c 25: CPU, 26: Scanner section,
27: Plotter section.

Claims (2)

[Claims] (1) In an electrophotographic facsimile machine that reproduces received image information (compressed data) and stores one page worth of reproduced data in a page memory, then starts recording the reproduced data stored in the page memory. means for determining the length of the received image in the sub-scanning direction; and means for controlling the ON time of a transfer charger for transferring the toner developed on the recording medium to the recording paper based on the determined length. A facsimile machine characterized by: (2) In an electrophotographic facsimile device that reproduces the received image information (compressed data) and stores one page worth of reproduced data in the page memory, it starts recording the reproduced data stored in the page memory. Accordingly, a means is provided for determining the position of the printing part in the sub-scanning direction of the received image, and a transfer charger for transferring the toner developed on the recording medium to the recording paper is turned on in accordance with the determined position of the printing part. A facsimile device characterized by: