JPS62230156A - Facsimile reception equipment - Google Patents

Abstract

PURPOSE:To eliminate fundamentally a print position deviation by thinning out print data or giving dummy data to correct the print position deviation between 2-color print letters due to differences in load. CONSTITUTION:A facsimile reception signal is converted into print data of a prescribed from by a reception circuit 1 and sent and stored in a memory 2 by a prescribed data quantity. The memory 2 supplies print data to a head 4 while repeating write/read of the print data. After the print data is recorded by the 1st colors, black colors Q1, Q2 as thermosensitive recording, the recorded part is rewound and the 2nd colors, red colors Q3, Q4 are subjected to thermosensitive recording. While the dummy data is giving in the intermittent timimg of the scanning timimg in the recording of black print data to correct the shrinking quantity (d) to zero with respect to the recording position deviation E1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a facsimile receiving device, and particularly to a two-color recording facsimile receiving device that is applied to copyboards and the like. - [Prior Art] Facsimile receiving devices are becoming widespread as one of the OA devices that enable image communication. In particular, it is also used as a means to generate hard copies from copyboards, etc. using the image communication function. Also known is a facsimile receiving device that performs two-color recording using light-fixing type two-color thermal recording paper as a pioneer of multicolor printing.

To perform two-color recording using such light-fixing type two-color thermal recording paper, the first color is first thermally recorded, and then the amount of light fixing a! required for recording the first color is fixed. ! The two-color thermal recording paper (hereinafter referred to simply as recording paper) is rewound and a second color thermal recording is performed.

FIG. 3 is a block diagram showing the main parts of the facsimile receiving apparatus as described above. In the figure, a roll of recording paper 6 is stored in a recording paper receiver 10 such as a recording paper storage section formed inside the receiver, and a platen roller 5 is rotated by a drive device (not shown). The paper is transported in the transport direction 101 at a predetermined paper transport speed. The recording paper 6 may be attached to the housing body through a spool other than the recording paper holder as shown in Fig. 3, but in any case, there is a drag force against the conveyance of the recording paper due to its own weight, friction with the housing body, etc. , which has so-called pack tension, which acts as a transport load for the recording paper.

In the head 4, a heating element for performing thermal recording is attached to the recording paper 6.
It has a thermal recording printing section arranged in a line corresponding to each pixel of one recording scan in the horizontal direction, and first performs thermal printing of the first color.

Next, the recording paper 6 passes through a cutter 7 without being cut, and is subjected to optical fixing by an optical fixing device 8.

The optical fixing device 8 includes one or more fluorescent lamps 81 and a reflecting plate 8.
The recording paper 6 constituted by 2 and conveyed is irradiated with predetermined ultraviolet energy to optically fix the thermal printing of the first color. After this, the recording paper 6 is reversed at high speed on the platen row 2.
5, the recorded portion of the first color is rewound in the rewinding direction 102.

The dotted line shown in FIG. 3 is the rewound recording paper.

Next, this rewound recording paper is conveyed again in the conveyance direction 101, and after thermal printing of the second color is performed by the head 4, it is cut into a predetermined length by the cutter 7, and then passed through the discharge roller 9. and taken out to the outside. head 4
In the second thermal printing, the second color develops, thus completing two-color thermal recording.

[Problem that the invention seeks to solve]

As mentioned above, when performing two-color thermal recording by light fixing, the first color is recorded, the transport required for this is rewound, and the second thermal printing is performed to record the second color. However, the magnitude of the load applied to the recording paper, that is, the pack tension, is significantly different between the thermal printing of the first color and the thermal printing of the second color. On the other hand, this slippage hardly occurs in the second color.

Therefore, in the first color, the received image shrinks due to this slippage, and the degree of shrinkage reaches a maximum of 0.5% or more in the recording bed area of each page.

In addition, when printing the second color, there is no slippage between the platen roller 5 and the recording paper, so the entire recording does not shrink, but printing of the second color starts from the last sheet of the first color where the slippage is maximum. As a result, the printing start position of the first color also becomes a shortened (faster) printing position to the extent of 0.5% or more as mentioned above, and from these situations, the recording of the first color and the printing of the second color are The positional relationship with the record has faded 2
The disadvantage is that it records in color.

Furthermore, the pack tension applied to the recording paper when thermally printing the first color described above changes depending on the remaining amount of the recording paper, that is, the roll diameter of the recording paper remaining in the facsimile receiving device. Therefore, there is a drawback that the change in pack tension due to the roll diameter also causes the above-mentioned color shift.

That is, the problem to be solved by the present invention, in other words, the purpose of the present invention is to eliminate the above-mentioned drawbacks, and to reduce the time between two-color printing due to the difference in load by thinning out the print data to be recorded in two-color heat-sensitive recording or by adding dummy data. It is an object of the present invention to provide a facsimile receiver in which printing position deviation is fundamentally eliminated by providing means for correcting printing position deviation n.

[Rounding method to solve problems]

In a facsimile receiving device that uses light-fixing type two-color thermal recording paper, a printing position between two-color printing that occurs based on the difference in the load applied to the light-fixing type thermal recording paper during first color printing and second color printing. The apparatus is configured to include a print position correction means for correcting the deviation by thinning the print data or adding dummy data to the print take.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS A facsimile receiving apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the main parts of an embodiment of the present invention. In the figure, the facsimile receiving device has a receiving circuit 1.
．． Memory 2. Print data control circuit.

Roll diameter detection section 31. Head 4. Platen roller 51 recording paper 6. Cutter 7, optical fixer 8. Discharge roller9. It is composed of a recording paper receiver 10, etc., and these components include a receiving circuit 1, a memory 2. The print data control circuit 3 and the roll diameter detection section are directly related to the present invention, and the sections from the head 4 to the recording paper receiver 10 are the same as those shown in FIG. is omitted.

The facsimile reception signal is converted into print data in a predetermined format by a receiving circuit 1, and is sent to a memory 2 and stored in a predetermined amount of data, for example, one scan of a transmitted image.
Ru.

The memory 2 has a print data storage memory for two channels, a control data storage memory, etc., and is written in such a way that every time print data for one scan is written, print data for the previous scan that has already been stored is read out. , supplies print data to the head 4 while repeating reading. This print data is data related to printed characters or images transmitted in a two-color thermal recording format.

FIG. 2(a) is an explanatory diagram of a transmitted image for explaining an example of a transmitted image used in light-fixing two-color thermal recording. In this case, red is used as the two colors, black is used as the first color, and red is used as the second color.

The scanning direction to be transmitted as a facsimile signal is horizontally from red Q3 to black Q1, and vertically in the direction of the arrow at a predetermined scanning speed. Now, suppose that the transmitted images P1 of two sets of black and red adjacent patterns of black Ql red Q3 and black Q2 red Q4 are thermally printed on the recording paper 6 through the head 4't- one scanning line at a time. do.

FIG. 2(b) is a received image explanatory diagram for explaining the reception result of the transmitted image shown in FIG. 2(a).

After recording black Ql and Q2 as thermal recording of the first color, rewinding the recording time required for recording the first color,
Next, thermal recording of the second colors of red Q3 and Q4 is performed to obtain a received image P2'. In this first color recording process, the aforementioned pack tension is strongly applied to the recording paper, so that slipping occurs between the platen roller and the recording paper, resulting in the received image being shrunk. In FIG. 3(b), black Q2 is recorded in a state moved to the left by a shrinkage amount d from the image position of Q2 in FIG. 3(a). This shrinkage amount d is approximately 0 for ordinary light-fixing two-color thermal recording paper.
．． 5% or more, even 0.5% is still A.
In the case of 4th edition, it reaches about 1.5m. Therefore, in the case of the second color without slippage between the platen roller and the recording paper, a printing position deviation El occurs between the adjacent second color recording red Q4 that should be recorded.

Now, when the recording paper finishes recording the first color, it is rewound and the red Q
3. Start recording the second color of Q4.

However, in this case, the recording position of red Q3 is also black/Ql
The image is recorded in a state shifted to the left by the shrinkage amount d, resulting in a printing position shift M2+. This is bad.

From the recording operation state at the end of the first color recording where tension is applied, to rewinding where no pack tension is applied, and then at the beginning of the transition to the second color recording, the recording position deviation El
This is due to the fact that it is carried over as is.

To correct these recording position deviations, the recording position deviation El
For this, it is possible to correct the shrinkage amount df to zero while adding dummy data at intermittent scanning timings in recording the first color self-illuminating color print data, or conversely,
Assuming that there is no recording position deviation E2, the correction can be made such that the print data corresponding to the shrinkage amount d is thinned out at intermittent timing and reduced to zero in recording the second color red print data. The reason for applying or thinning out data intermittently is that since the recording position deviation El is accumulated for each page, it is necessary to correct it at intermittent timing to achieve the most balanced correction.

In the above-described correction, it is assumed that there is no recording position deviation E2, but in reality, this may always occur. This recording position shift is a constant amount that the second color recording has with respect to the first color recording, and is not an accumulation due to recording.

Therefore, it can be easily corrected by delaying the start of thermosensitive recording for a time corresponding to the shrinkage amount d at the beginning of recording.

The above correction works effectively if the pack tension applied to the recording paper during thermal printing of the first color is always constant. However, since the pack tension varies depending on the roll diameter, in order to further eliminate color misregistration, a correction based on the roll diameter is performed in addition to the above correction. That is, the correction based on the roll diameter can be performed by increasing or decreasing the number of dummy data according to the roll diameter based on the above correction. Referring to FIG. 1, the print data control circuit 3 increases or decreases the number of dummy data regarding the roll diameter in accordance with the roll diameter signal sent out by the roll diameter detection section 31. Note that the roll diameter detection section 31 is constituted by a contact type mechanical sensor, a non-contact type optical sensor, or the like.

Next, the operation of the facsimile receiving apparatus having the above-mentioned correction function will be explained. Figures 1, 2 (a) and (b)
), the printing position deviation is corrected under the control of the built-in program of the print data control circuit 3.
, the print data is supplied from the memory 2 to the head 4 in the form of adding dummy data for each intermittent scanning line for recording the first color, and delaying the start time of printing of the second color for the print position deviation E2. It will be implemented in the future. In this case, the dummy data is produced by repeating the same recording scan at preset intermittent scan timing.

For example, when recording on A4 size recording paper, there are 297 sheets in the vertical direction assuming the entire surface is used.

Since the facsimile receiving device records at a scanning density of 7.7 lines/rtan, 2286 (lines) out of 297 x 7.7 scans are performed on the entire page. If the recording shrinks by 0.5%, this is equivalent to the cumulative omission of about 11 scans, and an intermittent dummy that applies the same print data as dummy data to the head 4 every scan of about 150 grains. It can be canceled to almost shrinkage dl by adding load.

In addition, to delay the recording start timing of the second color by 1.5 minutes, it is sufficient to shift the read timing by the corresponding time when reading print data from the memory 2, and the above-mentioned dummy data addition and read timing delay Both can be easily carried out using the memory 20, control data memory, etc. under the control of the print data control circuit 3.

Note that the absolute amount of print position deviation is known in advance for each facsimile receiving device, and therefore, the intermittent scan repetition period, delay time, etc. for correction can also be treated as known amounts in advance.

Alternatively, instead of correcting as described above, the printing position deviation El can be removed by adjusting the recording start timing of the second color to make the printing position deviation E2 zero and then intermittently thinning out the scanning of the second color recording. ° can be done.

Furthermore, by increasing or decreasing the tummy data programmed as described above in accordance with the roll diameter signal of the recording paper, it is possible to eliminate printing position deviations caused by the amount of remaining recording paper.

〔Effect of the invention〕

As described in detail above, according to the facsimile receiving apparatus of the present invention, in a facsimile machine that uses light-fixed two-color thermal recording paper, the load applied to the recording paper during printing of the first color and printing of the second color is reduced. By providing a means for correcting positional deviations between two-color prints caused by differences by thinning print data and adding dummy data, it is possible to realize a facsimile receiving device that fundamentally eliminates printing positional deviations between two colors. There is an effect.

In addition, since fluctuations in back tension on the recording paper are detected by detecting the diameter of the recording paper roll, it is possible to obtain a facsimile receiving device that eliminates color misalignment while making the above corrections in real time. There is also.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of a facsimile receiving device according to the present invention, and FIG. FIG. 2(b) is a received image explanatory diagram showing the reception result of the transmitted image shown in FIG. 2(a), and FIG. 3 is a block diagram showing an example of a conventional facsimile receiving apparatus. l...Reception circuit, 2...Memory, 3.
...Print data control circuit, 4...Head, 5...Platen roller, 6...Recording paper, 7...Cutter, 8... ...optical fixing device,
9...Discharge roller, 10.Old...recording paper holder,
31...Roll diameter detection section. Agent Patent Attorney Uchihara SoI ゛□, Figure 2 (
,2) Figure 2(b)

Claims (1)

[Scope of Claims] In a facsimile receiving device that uses light-fixing two-color thermal recording paper, 2. A facsimile receiving device comprising a print position correction means for correcting print position deviation between color prints by thinning print data or adding dummy data to the print data.