JP2594198B2 - Image forming device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an image forming apparatus such as a printer device and electronic mail that is connected to the computer or a word processor, and more particularly to an improvement of the image forming apparatus can determine the reproducibility of the original image .

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 54-81714 discloses an example of a conventional method for determining the reproducibility of an image in an image forming apparatus. A technology has been disclosed in which a part of the image is detected and fed back to the transmitting side, and the image quality of the received image is determined on the transmitting side.

Japanese Patent Application Laid-Open No. 53-132937 discloses that a document transmitted from a transmitting side to a receiving side is returned to a transmitting side so that a sender transmits a document having the same content as that of a document transmitted by the sender. There has been disclosed a technique that allows the user to visually confirm that the operation has been completed.

[0004]

However, in the above-mentioned prior art, it is possible to determine whether the transmitted original image has reached the receiving side without fail. For example, the original image is transmitted to the receiving side. If it is determined that it has not arrived,
The sender had to send the manuscript again, which was very complicated.

Here, the cause of the inability to transmit the original image is as follows.
When the sender is on the receiving side, the sender must repeat the complicated transmission operation many times. On the other hand, if the unreceivable original is urgent important data, There was a problem that it could not be received immediately.

It is considered that the cause of the reception failure on the receiving side is that the transfer sheet, the thermal paper, the ink ribbon, the ink sheet, and the like have been consumed. further,
Due to problems in manufacturing and storing the transfer sheet, thermal paper, ink ribbon, ink sheet, and the like, the image quality may be extremely poor. In this case, depending on the device, the contents of the memory are sequentially cleared after the printing of the image is completed, so that reprinting cannot be performed and important data cannot be reproduced.

[0007] The present invention has been made in consideration of the above-mentioned matters, and its purpose is to determine whether an image is normal or abnormal, and further, when an abnormality has occurred in the image quality, the image has been transmitted. The character code relating to the original image is transferred to another memory means, and an alarm signal is sent to the transmitting side.
Feedback to stop character code transmission.
It is an object of the present invention to provide an image forming apparatus capable of causing the image forming apparatus to perform an operation.

[0008]

According to the present invention, there is provided an image forming apparatus for forming an image on an output sheet based on a character code relating to a document image input from a transmitting side. in a storage means for storing the character codes the inputted character code I read the printed output image on the output paper
A reading unit that outputs a read output code as a code, and is connected to the storage unit and the reading unit, and stored in the storage unit.
Between the read character code and the read output code of the reading means.
When the degree of mismatch exceeds a certain allowable value, a comparing means for outputting a mismatch signal and a path connected to the comparing means and provided between the transmitting side and the storage means, wherein the mismatch signal is input. A switching means for switching the path so as to connect the storage means and a different memory means, and an alarm in parallel with the switching of the path.
Feeds back the signal to the transmitting side and sends the character code
And control means for stopping transmission of the message .

[0009]

SUMMARY OF According to the above-structured image forming apparatus, and the character code read from the storage means, compares the read output code read by the image reading means, acceptable results, the degree of mismatch is constant comparison If the value exceeds the value ( it is determined that the reproducibility of the image is out of the predetermined range ), the character code related to the document image stored in the storage unit is transferred to another memory unit. Can be sent
Feeds back the alarm signal to the receiving side and character code
Can be stopped.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example in which the present invention is applied to a laser printer. In FIG. 1, reference numeral 10 denotes a printer. Page memory 40 (described later) coded print data sent from (character codes) D _i is input to the modulator 11 via a calibration Kurata generator 60, appropriately modulates the laser beam from the laser tube 12 Thus, the modulator 11 outputs a modulation output. This modulation output is
An electrostatic latent image is formed on the drum-shaped photoconductor 15 via the rotating mirror 13 and the reflecting mirror 14, and the developing device 16
A predetermined image output is formed by the fixing device 7 and the fixing device 18 on the output paper 20 conveyed from the paper feeding device 70, and the configuration up to this point is the same as a normal laser printer.

Reference numeral 30 denotes a paper discharge unit from which the output paper 20 is discharged, and an image reading device 31 for detecting and reading an output image on the output paper 20 is provided near the paper discharge unit. The image reading device 31 is, for example, a CCD (Charge Co.)
(Dupled Device = charge coupled device).
32 is a light source, 33 is a lens, and 34 is a paper discharge tray.

Reference numeral 40 denotes a page memory as storage means.
Its on the input side is provided with a switching circuit 41, character such as encoded printing data D _i from the transmission side S
The code v is transmitted to the page memo 4 via the switching direction 41.
0, and sequentially stores the print data _Di in the order of addresses. Reference numeral 42 denotes a read control circuit controlled by, for example, a timing signal of a transport system. The control signals p and q are input to the page memory 40 and a code conversion circuit 43 to be described later, and control the data input / output timing in these.

Reference numeral 43 denotes a code conversion circuit as a conversion means, which drives the image reading device 31 based on the control signal q, converts the read output of the image reading device 31 into a code, and outputs a read output code u. . A circuit 44 receives the read output code u and the character code v read from the page memory 40 and compares them. Reference numeral 50 denotes another memory circuit, and reference numeral 51 denotes a printer connected thereto.

Next, the operation of the laser printer will be described. Now, when the printing data D _i from the transmission side S is assumed which is transferred, the printing data D _i is the switching circuit 41
Are sequentially stored in the page memory 40 in the order of addresses. Then, from the page memory 40, the print data D _i
Are sequentially sent to the modulator 11 via the character generator 60, and output paper 20
Output as image above. Then, the output paper 20
Arrives at a predetermined position of the paper discharge unit 30, a timing signal of the transport system is input to the reading control circuit 42, whereby the reading control circuit 42 outputs control signals p and q.

The page memory 40 receiving the control signal p
Outputs the character code v, which is the head address of the internal memory, to the comparison circuit 44. On the other hand, the code conversion circuit 43 receiving the control signal q drives the image reading device 31 to read the output image on the output paper 20 located in the paper discharge unit 30 and converts the read output into a character code. Then, the read output code u is output to the comparison circuit 44.

The comparison circuit 44 has a character code v
Is compared with the read output code u to determine whether both u and v match. Hereinafter, similarly, the image of one page is determined one by one. As a result of the comparison, if the character code v and the read output code u do not match, or if the degree of mismatch exceeds a certain allowable value, the stop display a
And an alarm signal c is fed back to the transmitting side S.
To stop sending signals such as print data from the sending side.
Then, the processing such as the printing operation is stopped.

If the processing cannot be stopped,
At the same time as the output is stopped, the switching command b is output and the switching circuit 4
1 is switched and the character code v is stored in another memory 5.
0 or output by another printer 51.

Furthermore, by feeding back the alarm signal c to the sender S, Ru stops the transmission of the signal, such as print data
At the same time, the transmitting side S is caused to retransmit the character code v .

[0020]

As described above, according to the present invention,
The character code read from the storage means is compared with the read output code read by the image reading means, and as a result of the comparison, if it is determined that the reproducibility of the image is out of the predetermined range, the storage means Related to the stored original image
Since the character codes can be transferred to different memory means, the character codes can be stored in different memory means or output by another printer.

Therefore, the image forming apparatus according to the present invention has an excellent effect that urgent and important data can be reliably received from the transmission side.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of the present invention.

[Explanation of symbols]

20 output paper, 31 reading means, 40 storage means, 4
1 switching means, 42 control means, 43 conversion means, 44
... comparison means, 50 ... memory means.

Claims (1)

(57) [Claims] 1. A key associated with a document image input from a transmitting side.
In the image forming apparatus that forms an image on an output sheet based on Yarakutakodo, calibration that is the input
Storage means for storing Rakutakodo, the printed output image on the output paper as a character code I reading
Reading means for outputting a read output code; and a storage means connected to the storage means and the reading means and stored in the storage means.
The mismatch between the lactor code and the read output code of the reading means
If the degree exceeds a certain allowable value, a comparing means for outputting a mismatch signal is connected to the comparing means,
Provided in a path connecting said sender and storing means, when said mismatch signal is inputted, a switching means for switching the path to connect the storage means and this with different, the memory means, the path Sends alarm signal in parallel with switching
Feedback to the
An image forming apparatus comprising: a control unit for stopping the image forming apparatus.