JPH05103166A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To provide a facsimile equipment which guarantees feeding of a recording paper in stable white line skip recording even if a cheap and small motor is used. CONSTITUTION:An initial identifying procedure decides whether currently selected recording paper size is maximum size or not and generates an NSF signal which permits white line skip recording, if a recording paper is maximum size or prohibits it, if it is not, and transmits it to the image transmission side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine, and more particularly to a facsimile machine which performs white line skip recording when receiving an image.

[0002]

2. Description of the Related Art Conventionally, there has been known a technique for improving transmission speed by skipping a white line which does not require a recording head to be operated when a black recording output is performed on a white background in a facsimile machine.

In the conventional white line skip function, if the receiving side has a recording ability to feed one line of recording paper at a speed faster than the recording speed of one line regardless of the recording paper size, the receiving side In addition to the fact that the white line can be skipped to the transmitting side and the normal minimum transmission time (for example, 20 ms), the transmission time when the white line is skipped (for example, 10 ms) is transmitted using a procedure signal. In response to this, when a white line is detected, the minimum transmission time is set shorter than the normal transmission time and transmission is performed. Generally, such a white line skip is a non-standard one that is executed only between devices of the same manufacturer.

[0004]

However, the above-mentioned prior art does not consider the problem that the load applied to the recording drive system varies depending on the size of the recording paper on the receiving side.

That is, when the recording paper on the receiving side is smaller than the maximum size that can be set (for example, B4
If the A4 size recording paper is set when the maximum size recording paper is used), the load applied to the recording drive system becomes large and the motor cannot stably rotate due to insufficient torque during the white line skip. there were.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide a facsimile apparatus which can guarantee stable feeding of recording paper in white line skip recording even when an inexpensive and small motor is used. ..

[0007]

In order to solve the above problems, in the present invention, in a facsimile apparatus which performs white line skip recording at the time of image reception, the facsimile apparatus according to the recording paper size selected for image recording is used. In this configuration, a control means for permitting or prohibiting the white line skip recording is adopted.

[0008]

According to the above construction, according to the recording paper size,
That is, when performing the white line skip recording, the white line skip recording can be permitted or prohibited according to the condition of the motor torque required for the size.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the drawings.

FIG. 1 shows the structure of a facsimile apparatus adopting the present invention. A CPU 1 in the figure is composed of a microprocessor and the like, and according to a program stored in a ROM 2, the entire facsimile apparatus, that is, a RAM 3, a nonvolatile RAM 4, a character generator (CG) 5,
Storage unit 6, reading unit 7, modem 8, NCU (network control unit)
9, the operation unit 12, the display unit 13, and the selection signal transmission unit 14 are controlled.

The RAM 3 stores the binarized image data read by the reading unit 7 or the binarized image data recorded by the recording unit 6, modulated by the modem 8 and output to the telephone line 10 via the NCU 9. The binary image data to be stored is stored.

The RAM 3 also stores the binarized image data input from the telephone line 10 and demodulated by the modem 8.

The non-volatile RAM 4 is for surely storing telephone number data and the like even when the power is cut off. For example, the destination name and the destination telephone number are registered in the nonvolatile RAM 4 in association with each other, and the destination station can be called by the control of the CPU 1 according to a predetermined operation.

The CG 5 stores character data, and is used for inputting a JIS or ASCII code or the like to take out image data of a character corresponding to the code and record or send it to the partner station.

The recording unit 6 is composed of a thermal printer or a laser beam printer, and records the received data stored in the RAM 3 or the image data read by the reading unit 7 to generate a hard copy.

The reading unit 7 is composed of a CCD line sensor or a document conveying system, and reads image data to be transmitted or image data to be copied and recorded by the recording unit 6 and outputs it to the RAM 3.

The recording section 6 and the reading section 7 are provided with various kinds of photosensors for detecting the presence or absence and the position of recording paper or a document. In particular, the recording unit 6 is provided with a sensor for detecting the size of the loaded recording paper, or in a device loaded with a plurality of sizes of recording paper, the recording paper size currently selected. The CPU 1 controls recording and reading using the outputs of these sensors.

The modem 8 is a modem of a predetermined system, for example, G3, G2, G1, or FM system which complies with CCITT recommendation. The modem 8 is used for modulation / demodulation of transmitted / received image signals or procedure signals.

The NCU 9 switches or connects the telephone line to either the modem 8 or the telephone 11. The telephone 11 is a telephone which is integrated with a facsimile machine or is a separate telephone, and comprises a handset and a speech network, a dialer, a ten-key pad or a one-touch key.

The operation unit 12 is composed of an LCD display and ten keys, one-touch keys or function keys such as a start / stop key. The display unit 13 is provided on the operation panel of the operation unit 12, and includes an LCD display or LEDs.

Next, the operation of the above configuration will be described.

The facsimile apparatus of this embodiment has a white line skip function. The white line skip function transmits the encoded data of one line in a transmission time (eg, 5 ms) shorter than the normal minimum transmission time of one line (eg, 10 ms) when the image of one line is completely white as described above. When the receiving side receives the all-white line, the recording mechanism is not driven and the recording unit 6
The paper feeding operation is performed by controlling only the feeding motor of (1) to shorten the transmission time of one original.

This white line skip function is currently realized only between devices of the same manufacturer. Whether or not white line skip is performed using a procedure signal such as a non-standard signal, and the transmission time when the white line is skipped. It decides between the transmitter and the receiver how many.

White lines can be skipped because the minimum transmission time of one line on the transmission side is shorter than that on the reception side, and the recording unit 6 can feed one line of recording paper faster than the minimum transmission time on the reception side. This is the case.

In particular, regarding the recording unit 6 on the receiving side, the paper feeding must be faster than the minimum transmission time declared. Therefore, in order to perform an efficient white line skip, it is necessary to feed the paper faster and declare a small value as the minimum transmission time. As a result, the load applied to the motor for conveying the recording paper becomes larger than that in the case where the white line skip is not performed, so that the torque of the motor is increased and the cost of the motor is somewhat increased.

Further, as described above, the load applied to the motor changes depending on the recording paper size. Generally, the coefficient of friction between the paper and the roller that feeds the paper is smaller than the coefficient of friction between the rollers. Therefore, when the maximum size of recording paper that can be set in the recording unit 6 is set, the load is the smallest and the size smaller than that. In the case of the recording paper, the load becomes large.

Therefore, in consideration of this load condition, it is necessary to further increase the motor torque in order to perform the white line skip even for recording paper of a small size, which further increases the cost of the motor.

Therefore, in order to minimize the cost increase of the motor and to make the motor as small and lightweight as possible,
It can be considered to control whether or not the white line skip is performed according to the size of the recording paper loaded.

FIG. 2 shows a control procedure for controlling the white line skip according to the recording paper size in the configuration of FIG. The procedure shown in the figure is executed by the CPU 1 during the pre-communication procedure of facsimile communication, and is stored in the ROM 2 as a control program for the CPU 1.

In step S1 of FIG. 2, the recording paper size is detected. That is, whether or not the recording paper loaded in the recording unit 6 is the maximum size that can be loaded is detected using a recording paper sensor of the recording unit 6 or the like.

In step S1, when the maximum size recording paper is loaded, the load on the motor is minimum and white line skipping is possible.
Then, the information of the minimum transmission time when the white line is skipped and the information indicating that the white line can be skipped are set in the NSF (non-standard device) signal to perform the white line skip, and the NSF signal generated in step S3 is set. Is sent.

On the other hand, if it is determined in step S1 that the loaded recording paper is not of the maximum size, the process proceeds to step S4 to generate an NSF signal indicating that white line skip is not possible Move to S3.

As described above, the white line skip function is enabled only when the size of the recording paper on which the load on the motor is minimum is the maximum size. It is possible to skip the white line without increasing the size and reduce the transmission time as much as possible according to the recording paper size.

In the above, whether or not to perform the white line skip is controlled according to the recording paper size. However, if there is a condition other than the recording paper size that affects the load of the motor, the white line skip is performed accordingly. You can decide whether.

Further, in the above embodiment, the white line skip is performed only in the maximum size, but it is possible to determine whether or not the white line skip is performed in a plurality of sizes within a range where the motor is not overpowered.

[0036]

As is apparent from the above, according to the present invention, in a facsimile apparatus which performs white line skip recording when an image is received, white line skip recording is performed according to the recording paper size selected for image recording. Since a configuration is provided in which a control means for permitting or prohibiting the white line is adopted, the white line is adjusted according to the recording paper size, that is, when the white line skip recording is performed, according to the motor torque condition required for the size. Skip recording can be permitted or prohibited, and even when using an inexpensive and small motor, stable paper feeding in white line skip recording can be guaranteed, and images can be printed as fast as possible according to the recording paper size. An excellent facsimile device capable of receiving can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram of a facsimile apparatus adopting the present invention.

FIG. 2 is a flowchart showing a control procedure of a white line skip function in the device of FIG.

[Explanation of Codes] 1 CPU 2 ROM 3 RAM 4 Nonvolatile RAM 5 CG 6 Recording unit 7 Reading unit 8 Modem 9 NCU 10 Telephone line 11 Telephone 12 Operation unit 13 Display unit

Claims (2)

[Claims] 1. A facsimile apparatus for performing white line skip recording upon image reception, further comprising control means for permitting or prohibiting white line skip recording according to a recording paper size selected for image recording. And a facsimile machine. 2. The facsimile apparatus according to claim 1, wherein white line skip recording is prohibited when a small size recording paper is selected for image recording.