JPH04309065A - Facsimile equipment with automatic identification function of original width - Google Patents

Abstract

PURPOSE:To realize a function automatically identifying an original width even when the original size is not the routine size in the facsimile equipment converting an original picture into an electric signal, sending the signal and printing out the original picture onto recording paper through the received electric signal. CONSTITUTION:The facsimile equipment provided with an original read section converting an original picture into an electric signal and sending the signal and a recording section printing out the original picture onto recording paper through the received electric signal is provided with an original width identification means which switches a back plate 5 at a read position of the original read section to a white color group position 5b or a black color group position 5a and reading the black color group position 5a of the back plate 5 at the start of original read. Thus, the original width is distinguished by the black color group position 5a and the actual original width is read by picture information for each line by the scanning section.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine that converts an image of a document into an electrical signal and transmits the same, and prints the image of the document on recording paper from the received electrical signal.

0002

2. Description of the Related Art The equipment configuration of this type of facsimile machine will be explained with reference to FIG. The facsimile machine 1 includes a document reading section 3 and a recording section 2.

[0003] The document reading unit 3 scans the flow of the document 20 placed on the inclined tray by a separating/feeding roller 21 for automatic paper feeding, a CCD sensor 22, a lens 23, a mirror 24, and a light source 25. Section 26, discharge roller 2
7 are arranged in order. Also, 28a, 28b,
28c is a document sensor, 28d is a reading position sensor, and 30 is a back plate. The color of the back plate 30 is normally white for electrical shooing correction. The operation of this document reading section 3 is as follows. The original 20 is fed to the reading position confirmed by the reading position sensor 28d and then stopped once. At the same time, the document size is determined by document sensors 28a and 28b. When both the document sensors 28a and 28b are ON, the document is A3 size, and the document sensor 28a is ON.
N, but if the document sensor 28b is OFF, it is determined to be B4 size, and if both document sensors 28a, 28b are OFF, it is determined to be A4 size. Note that the document sensor 28c is for checking the presence or absence of a document. Then, the original is sequentially fed in a stepwise manner while the image information is read line by line by the scanning unit 26. Reading position sensor 28d
When detecting the end of the document, it sends out a one-page end signal. After that, the next original 20 is continuously fed in by the separating/feeding roller 21, and all the originals are ejected by the original sensor 20.
It is detected at c.

Next, the recording section 2 has a recording head 12, a platen roller 13, and a cutter 14 arranged in this order relative to the flow of a roll of thermal recording paper 11. Further, 15 is a first recording paper sensor, and 16 is a second recording paper sensor. The operation of this recording section 2 is as follows. The presence or absence of the thermal recording paper 11 is detected by a first recording paper sensor 15,
If the thermal recording paper 11 is not detected, a new thermal recording paper 11 is loaded. Then, the leading edge of the thermal recording paper 11 is set so as to be aligned with the second recording paper sensor 16,
It enters a reception standby state. Normally, once the thermal recording paper 11 is conveyed by the platen roller 13, the cutter 14 operates to cut and trim the leading edge of the thermal recording paper 11, eject the margin, and rotate the leading edge of the thermal recording paper 11 in the opposite direction. It is pulled back and automatically set at the position of the second recording paper sensor 16. When reception begins in this state, the thermal recording paper 11 is moved stepwise each time the recording head 12 records one line. When the reception for one page is completed, the cutter 14 is operated at a timing when the recording position reaches the cutter 14. Whether or not the thermal recording paper 11 is running normally can be determined by the first recording paper sensor 15 and the second recording paper sensor 16.
This is confirmed by the operation of a timer counter (not shown).

[0005]

[Problems to be Solved by the Invention] In the document reading section 3 of the facsimile machine 1 described in the prior art, the document sensor 2
Standard sizes A3, B4, and A4 are determined by 8a and 28b. Therefore, even if the original is smaller than A4, for example, it is determined to be an A4 original. Therefore, there is a problem in that background color correction is not performed accurately for originals that are outside the standard size. In other words, when a document smaller than A4 is set, as shown in Figure 6, if the background color is corrected on the A4 width, the background color will be corrected accurately due to the influence of reading the color of the back plate outside the document. I can't. In addition, when the read image information is encoded and transmitted, only the necessary parts are subject to image processing according to the document width.
If the original is smaller than 4, it will be processed as A4 image information, and there is also the problem that the extra portion will also become image information.

The present invention has been made in view of the above-mentioned problems of the conventional technology, and its purpose is to automatically identify the width of a document even if the document is of a non-standard size. The purpose of this invention is to provide a facsimile device that has the function of

[0007]

[Means for Solving the Problems] In order to achieve the above object, a facsimile apparatus of the present invention includes a document reading unit that converts an image of a document into an electrical signal and transmits the same, and a document reader that converts an image of a document into an electrical signal and transmits the same, and a document that converts the image of the document into an electrical signal and prints the document onto recording paper based on the received electrical signal. In a facsimile machine equipped with a recording section for printing an image, the back plate at the reading position of the document reading section can be freely switched to white or black, and the width of the document is determined by reading the black color of the back plate at the initial stage of document reading. It is equipped with identification means.

[0008]

[Operation] When the back plate is switched to black color at the beginning of document reading, the width of the document is distinguished by black color, and the width of the document is
The document width can be read from the image information for each line.

[0009]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an equipment layout diagram of a document reading section according to the present invention. In the figure, 20 is a document, 21a is a separation roller, 21b
28d is a feed-in roller, 28d is a reading position sensor, 25 is a light source, 22 is a CCD sensor, and 27 is a discharge roller, which operate in the same manner as described in FIG. The difference from FIG. 5 is that the back plate 5 disposed on the back side of the glass 4 has a black color 5a and a white color 5b, and can be freely switched between the black color 5a and the white color 5b by a spring 6 and an electromagnetic solenoid 7. The point is that When the electromagnetic solenoid 7 is ON, the back plate becomes black as shown in the figure, and when the electromagnetic solenoid 7 is OFF, the spring 6 causes the back plate to become white.

FIG. 2 is a diagram showing document width reading by the above-mentioned back plate switching means. As shown in FIG. 2A, the white color 5b of the back plate 5 is at the reading position until the reading position sensor 28d detects the document 20 having the width A. As shown in FIG. 2(b), the reading position sensor 2
When 8d detects the original 20, the black color 5a of the back plate 5 is switched to the reading position, and ΔH is set as image information for each line. Then, the white color 5b of the back plate 5 switches to the reading position and returns to its original position. As shown in the image information in FIG. 2(b), detect the width A from the first white to the last white,
The maximum value of A among the image information read by ΔH is determined to be the document width. If there is a black portion on both sides of the leading edge of the document as shown in FIG. 2(d), B, which is smaller than the actual document width A, will be determined as the document width. However, such documents are extremely rare, and the determined document width is displayed on the LCD display, allowing the operator to turn off the document width automatic reading function.
If you make it possible to set it to F, there will be no problem.

FIG. 3 is an equipment block diagram of a facsimile machine. In the figure, 31 is a line, 32 is a line control unit, 33 is a transmission control unit, and 34 is an R that stores programs and fixed information.
OM, 35 is a RAM, 36 is a document memory, 37 is a document reading section, 38 is a recording section, 39 is an operation section, and 40 is a main control section (CPU) in charge of overall control of these sections. moreover,
A back plate switching means 41 is connected to the main control section 40 . The document reading section 37 and the main control section 40 constitute a document width identification means that reads the black color of the back plate at the initial stage of document reading.
To perform background color correction on a document with a background color smaller than 4 using that width. Further, even if the original is smaller than A4, for example, the transmission efficiency is improved by processing the read image information as image information of that width. Note that for the document fed ahead of the reading position (portion ΔH in FIG. 2), image information is stored in the document memory 36, and only the portion corresponding to the document width is stored based on the document width determined later. may be used as the actual image information.

FIG. 4 is a flowchart of automatic document width reading. The flow starts by setting the original in step #1. In step #2, before sending the document to the reading position, the white of the back plate is read and electric shading correction is performed. In step #3, switch the back plate to black. In step #4, the original is sent in, and the width of the original is determined by reading ΔH. In step #5, it is determined whether the width of the read document is wider than the minimum width L. If it is wider than L (YES), the determined document width is set as is in step #6. If it is smaller than L (NO), in step #7, the document width is set to the document width determined by the conventional sensor. In step #8, the back plate is returned to white and reading is started. In step #9, steps #2 to #8 are repeated until there are no more originals left. And step #1
At 0, the transmission occurs and ends the flow.

In the above-described embodiments, the case where the back plate is white and black has been explained, but it is also possible to use white or black depending on the background color of the original.

[0015]

Effects of the Invention The facsimile device of the present invention is a facsimile device equipped with a document reading section that converts an image of a document into an electrical signal and transmits it, and a recording section that prints the image of the document on recording paper from the received electrical signal. The back plate at the reading position of the document reading section is switchable between white and black, and document width identification means is provided by reading the black color of the back plate at the initial stage of document reading. are distinguished by black color, and the document width is read by the image information for each line by the scanning unit, so even if the document is a non-standard document, the width of the document can be determined as is. therefore,
Even if the document has a non-standard background color, the background color correction within the width of the document is accurately performed. In addition, even if the manuscript is not in a standard format,
Since only the necessary portion of the document width can be processed as image information, transmission efficiency is also improved.

[Brief explanation of drawings]

FIG. 1 is an equipment layout diagram of a document reading section of the present invention.

FIG. 2 is a diagram showing document width reading by back plate switching means.

FIG. 3 is a device block diagram of a facsimile machine.

FIG. 4 is a flowchart of automatic document width reading.

FIG. 5 is a diagram showing the equipment arrangement of a facsimile machine and conventional document width reading.

FIG. 6 is a diagram illustrating background color correction in conventional document width reading.

[Explanation of symbols]

38 Recording Department 37 Manuscript reading section 5 Back plate 5a Black 5b White 7 Electromagnetic solenoid

Claims (1)

[Claims] 1. A facsimile machine comprising: a document reading section that converts an image of a document into an electrical signal and transmits the converted signal; and a recording section that prints the document image on recording paper from the received electrical signal; A facsimile machine having an automatic document width identification function, characterized in that the back plate at the reading position can be freely switched to white or black, and document width identification means is provided by reading the black color of the back plate at the initial stage of document reading. Device.