JPH06152907A - Recorder and facsimile equipment with the same - Google Patents

Recorder and facsimile equipment with the same

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Publication number
JPH06152907A
JPH06152907A JP4296925A JP29692592A JPH06152907A JP H06152907 A JPH06152907 A JP H06152907A JP 4296925 A JP4296925 A JP 4296925A JP 29692592 A JP29692592 A JP 29692592A JP H06152907 A JPH06152907 A JP H06152907A
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JP
Japan
Prior art keywords
recording
recording medium
line
image
step
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP4296925A
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Japanese (ja)
Other versions
JP3524111B2 (en
Inventor
Yukio Nobata
Tomoyuki Takeda
Takehiro Yoshida
武弘 吉田
智之 武田
之雄 野畠
Original Assignee
Canon Inc
キヤノン株式会社
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Application filed by Canon Inc, キヤノン株式会社 filed Critical Canon Inc
Priority to JP29692592A priority Critical patent/JP3524111B2/en
Publication of JPH06152907A publication Critical patent/JPH06152907A/en
Application granted granted Critical
Publication of JP3524111B2 publication Critical patent/JP3524111B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To reproduce even an isolated dot when a black ratio is low while preventing heat storage by controlling energy applied to a recording head corresponding to the counted number of black information and energizing times at the time of recording the prescribed amount of pictures. CONSTITUTION:A thermal head 10a is provided with a shift register 130 for inputting and holding the serial recording data by one line and a shift clock 123 from a data processing circuit 117 and outputting the recording data as parallel signals, a latch circuit 131 for latching the data of the shift register 130 by a latch signal 127 and a heat generating element 132 composed of an exothermic resistor by one line. The output signal 126 of a temperature sensor 59 for detecting the temperature of the thermal head 1Oa is inputted to a recording control part 118. Thus, the recording control part 18 changes the pulse width of a strobe signal 129 corresponding to the detected temperature of the thermal head 10a and changes the applying energy to the thermal head 10a corresponding to the characteristics of an ink sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for recording an image on a recording medium by energizing a recording head and a facsimile apparatus using the apparatus.

[0002]

2. Description of the Related Art Generally, a thermal transfer printer uses an ink sheet in which a heat-melting (thermally sublimable) ink is applied to a base film, and a thermal head selectively heats the ink sheet in accordance with an image signal, Image recording is performed by transferring the melted (sublimated) ink to a recording paper. Generally, this ink sheet is one in which the ink is completely transferred to the recording paper by one image recording (one-time sheet).
Therefore, after the recording of one character or one line is completed, it is necessary to convey the ink sheet by the amount corresponding to the recorded length and surely bring the unused portion of the ink sheet to the position for recording next. It was For this reason, the amount of ink sheet used increases, and the running cost of the thermal transfer printer tends to be higher than that of an ordinary thermal printer that records on thermal paper. In order to solve such problems,
JP-A-57-83471 and JP-A-58-201686
As disclosed in Japanese Patent Publication No. 62-58917 or Japanese Patent Publication No. 62-58917, a thermal transfer printer has been proposed in which a recording paper and an ink sheet are conveyed with a speed difference therebetween.

The present invention is a further development of the thermal transfer printer (one-time sheet type) and the thermal transfer printer using the multi-time sheet described in the above publication.

[0004]

In a thermal transfer recording type printer device using a thermal head, if the energy is continuously applied to the thermal head for recording, the temperature of the thermal head will be completely removed even during non-recording. It does not decrease to a so-called stored state. When such heat storage becomes extreme, for example, in the case of recording by the thermal transfer method, a part of the ink of the ink sheet is melted and transferred to the recording paper even when energy is not applied to the thermal head, and That is, so-called tailing occurs, in which the background stain and the ink recorded in the previous line are dragged. Further, if the amount of energy applied to the thermal head is reduced so that the thermal head does not accumulate heat, isolated dots will be faint and recording will not be completed completely.

Further, in the case of the thermal transfer printer using the above-mentioned multi-time sheet, when the amount of dots recorded in one line of data is large, the amount of ink to be melted is large, and the amount of ink melted in the ink layer of the ink sheet is large. A large shearing force is required between the melted part and the unmelted part of the ink. For this reason, the load of conveying the recording paper and the ink sheet also increases, and the conveyance of the recording paper and the ink sheet between the line with a large black ratio and the next line is driven by the drive timing of the conveying motor that conveys them. Even if the same is the same, there will be a slight delay before the actual conveyance. Therefore, if recording is performed without considering such a delay, there is a problem that the recording quality is deteriorated.

Further, when a jam of the recording paper is detected depending on whether or not the recording paper is correctly wound around the platen roller, the jam cannot be detected when a line having a high black ratio as described above is recorded. there were.

The present invention has been made in view of the above-mentioned conventional example, and it is an object of the present invention to completely reproduce even an isolated dot when the black ratio is low while preventing heat accumulation in the recording head.

It is another object of the present invention to provide a recording apparatus having an improved recording quality by delaying the recording timing when recording a line next to a line having a high black ratio.

[0009]

In order to achieve the above object, the recording apparatus of the present invention has the following constitution. That is,
A recording device for recording an image on a recording medium by energizing a recording head, comprising: a recording medium conveying unit for conveying the recording medium; Recording means for recording the image, the counting means for counting the number of black information of the image data recorded by the recording means, and the recording means according to the number of black information and the number of energization counted by the counting means. Control means for controlling the energy applied to the recording head.

In order to achieve the above object, the facsimile apparatus of the present invention has the following configuration. That is, a facsimile apparatus that energizes a recording head to record an image on a recording medium, detects a recording medium conveying unit that conveys the recording medium by rotating a roller, and detects winding of the recording medium around the roller. Detecting means for detecting a jammed state, and a judging means for judging whether the detection result by the detecting means is correct or not according to the detected state by the detecting means and the recording state of the recording medium detected by the detecting means Have.

[0011]

In the above structure, when the recording element of the recording head is energized a plurality of times to record a predetermined amount of image on the recording medium, the number of black information of the recorded image data is counted,
The energy applied to the recording head is controlled according to the counted number of black information and the number of energized times.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. In the following embodiments, a facsimile apparatus using a thermal transfer recording apparatus or a thermal recording apparatus will be described, but the present invention is not limited to this, and an inkjet recording apparatus that ejects ink droplets by heat, for example. It can also be applied to various printer devices such as a thermal printer and a thermal printer. [Description of Facsimile Machine (FIGS. 1 to 4)] FIGS.
FIG. 3 is a diagram for explaining a thermal transfer printer using an embodiment of the present invention.

First, in FIG. 2, a reading unit 100 photoelectrically reads a document and outputs it as a digital image signal to the control unit 101, and includes a document feeding motor, a CCD image sensor and the like.

Next, the structure of the control unit 101 will be described. Reference numeral 110 denotes a line memory that stores image data of each line of the image data. The image data for one line from the reading unit 100 is stored when the document is transmitted or copied, and when the image data is received, the line memory is received. One line data of the received and decoded received image data is stored. Then, the data stored here is output to the recording unit 102 to form an image. 111 encodes image information to be transmitted by MH encoding or the like,
An encoding / decoding unit that decodes the received encoded image data and converts it into image data. Further, 112 is a buffer memory for storing the coded image data transmitted or received. Each unit of the control unit 101 is controlled by a CPU 113 such as a microprocessor. In the control unit 101, in addition to the CPU 113,
A ROM 114 for storing the control program of the CPU 113 and various data, a RAM 115 for temporarily storing various data as a work area of the CPU 113, and the like are provided.

102 is a thermal line head (10a)
And a recording unit for recording an image on a recording sheet such as recording paper by a thermal transfer recording method. This structure will be described later in detail with reference to FIG. An operation unit 103 includes various function instruction keys for starting transmission, a telephone number input key, and the like. 1
04 is usually provided adjacent to the operation unit 103,
The display unit displays various functions and states. Reference numeral 105 denotes a power supply unit for supplying electric power to the entire device. Again 1
06 is a modem (modulator / demodulator), 107 is a network controller (NC)
U) and 23 are telephones.

Next, the overall structure of the facsimile apparatus will be described with reference to FIGS. FIG. 3 is an external perspective view of the facsimile apparatus of this embodiment, and FIG. 4 is a structural cross-sectional view showing its configuration.

This facsimile apparatus is roughly classified into FIG.
A sheet feeding mechanism A for feeding a recording sheet as shown in FIG.
A recording mechanism B for actually storing, a reading unit 100 for reading a document image, an operation unit 103, and an ink sheet cartridge E loaded.

The supply mechanism A separates and feeds the recording sheets 2 placed in the paper feed cassette 1 one by one by a paper feed unit having a paper feed roller 3 and a paper feed piece 4 pressed against the paper. Then
The recording sheet 2 is conveyed by a pair of feed rollers 5a and 5b and supplied to a recording mechanism B described later. Further, the conveyance path of the recording sheet 2 is formed in a semicircular path which turns the recording sheet 2 upside down by the guides 6a and 6b.
Further, near the front of the recording mechanism B, a front end sensor 7 such as a photo sensor or a micro switch for detecting the front end position of the recording sheet 2 is provided. The paper feed cassette 1 is detachably attached to the main body 8, and the paper feed roller 3, the paper feed piece 4, and the feed rollers 5a, 5 described above are provided.
b, the guides 6a and 6b, the tip sensor 7 and the like are provided in the main body 8.

The recording mechanism B is an image signal transmitted from another device,
Alternatively, an image is recorded on the recording sheet 2 supplied from the supply mechanism A according to an image signal transmitted from the reading unit 100 described later. That is, the superposed recording sheet 2 and ink sheet 9 are pressed toward the platen roller 10b side by the recording head 10a constituting the recording means 10 described later, and the platen roller 10b is driven and rotated in the arrow direction of FIG. The recording sheet 2 is conveyed in the direction of arrow a. Then, in synchronization with this conveyance, the take-up roller 27 is driven and rotated in the arrow direction of FIG.
Is conveyed in the direction of arrow b. By causing the recording head 10a to generate heat in accordance with an image signal in synchronization with the conveyance of the recording sheet 2 and the ink sheet 9 as described above, the ink applied to the ink sheet 9 is melted (including sublimation, the same applies hereinafter),
The melted ink is transferred to the recording sheet 2 to form an image.

Recording sheet 2 on which an image is thus formed
Is further conveyed in the direction of arrow a, and the discharge guides 11a, 1
The discharge roller pair 12 passes through the path formed by 1b.
It is discharged out of the apparatus by a and 12b. In addition, a paper discharge sensor 13 such as a photo sensor or a micro switch for detecting passage of the recording sheet 2 is provided near the discharge roller pair 12a, 12b. These platen roller 10b, discharge guides 11a and 11b, discharge roller pair 1
2a, 12b and the discharge sensor 13 are provided in the apparatus main body 8, respectively.

Further, the ink sheet 9 is housed in an ink sheet cartridge E in this embodiment, the ink sheet cartridge E is loaded in a predetermined position of the apparatus main body 8, and the recording head 10a has a rotating shaft 14a. It is attached to the recording cover 15 as a lid configured to be rotatable via.

On the other hand, the reading unit 100 irradiates the original 16 with light, reads the reflected light with a photoelectric conversion element 22 such as a CCD, converts the light into an electric signal, and transmits this signal to another device according to an operation mode. Alternatively, it is transmitted or recorded (copied) to the recording unit.

That is, when the original 16 is placed on the original placing table 15a formed on the upper surface of the recording cover 15, the original 16 is preliminarily conveyed by the preliminary conveying roller 17a and the pressing piece 17b, and at the same time the separating roller 18a and the separating roller 18a are formed. The original 16 is separated and fed one by one by the pressing piece 18b which is pressed against this. This document 16 is further fed with a pair of conveying rollers 19a, 19
b and the discharge roller pair 20a, 20b,
It is configured to be discharged onto the discharge tray 21.
Then, while the document 16 is conveyed as described above, the image information of the document is read by the photoelectric conversion element 22 such as a contact sensor, and the image signal is transmitted to its own recording unit in the copy mode and transmitted. In the mode, it is configured to be transmitted to the recording system of another device.

As shown in FIG. 3, the operation unit 103 is for performing the above-mentioned operation mode switching operation, copy operation, transmission operation, and other instructing operations, and is provided with keys corresponding to various operations. . The operation unit 103 includes the reading unit 10
No. 0 is provided on the upper part of the document transport mechanism and is rotatably attached to the apparatus main body 8. A handset 23 of a telephone for transmitting or receiving is provided on one end side of the operation unit 103. In addition, in FIG. 4, reference numerals 24a and 24b denote electrical equipment substrates.

FIG. 1 is a diagram showing the connection of electric signals between the control unit 101 and the recording unit 102 in the facsimile apparatus of this embodiment, and the portions common to the other drawings are designated by the same reference numerals.

The data processing circuit 117 inputs the serial recording data 122a and the shift clock 122b for one line from the control unit 101, determines whether this line data is an all white line, and calculates the black ratio of one line. The information is transmitted to the recording control unit 118 through the signal line 124. At the same time, the serial recording data for one line and the shift clock 1 input from the control unit 101 are input.
23 is output to the thermal head 10a. At this time, a busy signal 125 indicating that data is being transferred to the thermal head 10a is output to the recording control unit 118. The recording control unit 118 can confirm whether or not the data transfer to the thermal head 10a is completed by the busy signal 125.

The thermal head 10a is a line head. The thermal head 10a receives the serial recording data for one line from the data processing circuit 117 and the shift clock 123, holds the same, and outputs the recording data for one line as a parallel signal. Shift register 13 by 127
A latch circuit 131 for latching 0 data and a heating element 132 including a heating resistor for one line are provided. Here, the heating element 132 is driven by being divided into m blocks represented by 132-1 to 132-m. Also,
Reference numeral 59 is a temperature sensor attached to the thermal head 10a for detecting the temperature of the thermal head 10a. The output signal 126 of the temperature sensor 59 is input to the recording control unit 118. As a result, the recording controller 11
Reference numeral 8 detects the temperature of the thermal head 10a and changes the pulse width of the strobe signal 129 in accordance with the temperature, or changes the energy applied to the thermal head 10a in accordance with the characteristics of the ink sheet 9. Reference numeral 116 is a programmable timer, which starts time counting when the time counting time is set by the CPU 113 and the start of time counting is instructed. Then, when the instructed time elapses, the CPU 11
It operates so as to output an interrupt signal, a timeout signal, etc.

Reference numeral 39 is a recording paper conveyance motor that rotationally drives the platen roller 10b that conveys the recording paper 2, 40 is an ink sheet conveyance motor that rotationally drives the ink sheet take-up roll 27 that conveys the ink sheet 9, and 38 is It is a paper ejection motor that rotationally drives the paper feed roller 3 and the paper ejection roller 12. Reference numerals 119, 120, 121 respectively correspond to a recording paper transport motor 39, an ink sheet transport motor 40,
And a driver circuit for rotationally driving the discharge motor 38. Although these motors are stepping motors in this embodiment, they are not limited to these and may be DC motors, for example.

The recording control unit 118 inputs a command from the control unit 101 and outputs a strobe signal 129 for driving the thermal head 10a in units of blocks. The recording control unit 118 can also control the pulse width of the strobe signal 129 by the black ratio information 124 input from the data processing circuit 117. When the black ratio information 124 input from the data processing circuit 117 recognizes that several all-white lines continue, the ink sheet conveying motor 40 is controlled to control the ink sheet 9.
It is also possible to stop the transportation of. Also, the recording control unit 118
Also controls the recording paper transport motor 39, the ink sheet transport motor 40, and the paper discharge motor 38. [Explanation of recording operation (FIGS. 1 to 6)] FIG.
Main control unit 101 in the facsimile apparatus of the embodiment
Is a flowchart showing a recording process for one page of the above, and the control program for executing this process is the ROM 11 of the control unit 101.
It is stored in 4.

This processing is performed, for example, by the encoding / decoding unit 11
It starts when one line of data is decoded from 1 and the next line of data can be recorded. Also,
It is assumed that the control unit 101 determines that the recording paper is mounted by the recording paper sensor 64 and that the ink sheet is mounted by the ink sheet transport sensor 65.

First, in step S1, the recording (image) data 122a for one line and the shift clock 122b synchronized therewith are transferred to the data processing circuit 117. At this time, at the same time, the data processing circuit 117 outputs the shift clock and the serial recording data 123 to the thermal head 1.
0a of the shift register 130. Next, in step S2, it is determined whether the transfer of the recording data for one line from the control unit 101 to the data processing circuit 117 is completed. If the transfer is completed, the process proceeds to step S3.

In step S3, a recording command is issued to the recording controller 118 to instruct the start of the recording operation. When the recording control unit 118 receives this recording command, in order to record one line, the recording paper conveying motor 39 and the ink sheet conveying motor 40 are rotated, and a strobe is provided to the thermal head 10a to perform thermal transfer. Make a record. The process of the recording control unit 118 will be described later.

Next, in step S4, it is determined whether the data transfer for one page is completed. If the data transfer for one page is not completed, it waits until the data creation for the next line is completed, and the process returns to step S1. When the transfer of the image data for one page is completed in this way, the process is completed.

FIG. 6 is a flow chart showing the recording process for one line in the recording controller 118 of the first embodiment. This recording process is started by receiving a recording command from the control unit 101.

First, in step S11, it is determined based on the busy signal 125 input from the data processing circuit 117 whether or not the recording data for one line has been transferred to the thermal head 10a. When the data transfer is completed, the process proceeds to step S12, and the latch signal 128 is output to the latch circuit 131 of the thermal head 10a. Then, in step S13, the ink sheet conveying motor 40 is driven to convey the ink sheet 9 by 1 / n line, and in step S14, the recording sheet conveying motor 39 is rotationally driven so as to convey the recording sheet 2 by one line. Let

Next, in step S15, the black ratio data 124 of the line to be recorded next, which is input from the data processing circuit 117, is input, and the counter n is set to "1" in step S16. Next, in step S17, the pulse width of the strobe signal 129 applied to each block of the heating element 132 is determined based on the input black ratio data 124 and the value of n according to the reference shown in FIG.

This will be described with reference to FIGS. 7 and 8. FIG. 7 is a diagram showing the timing of a strobe signal for energizing each block of the heating element 132. As shown, the heating element 132 is divided into four blocks. Each block is divided, and each block is energized four times to record one line of image data. Here, STB0 is the block 1 of the heating element 132.
The strobe signal of
STB2 indicates the strobe signal of the block 3 and STB3 indicates the strobe signal of the block 4. The pulse width of the first strobe signal is t 1 , the second is t 2 , and the third is t.
The third and fourth times are shown as t 4 .

FIG. 8 is a diagram showing the relationship between the pulse width of each strobe signal and the ratio of black data (black ratio) included in the image data of one line. Widths are shown in microseconds (μs).
As is apparent from FIG. 8, the pulse width of each strobe signal is the second scan (t 2 ) rather than the first scan (t 1 ).
Of the third scan (t 2 ) rather than the second scan (t 2 ).
3 ) is shorter. However, when the black ratio of one line is low, the thermal width of the thermal head 10a is unlikely to occur, and the pulse width is not so small in order to reliably record the isolated dots. In particular, when the black ratio is 0 to 15%, the pulse width is not changed in four scans. Thus, for example, when n = 1 and the black ratio is 50 to 30%, the pulse width t 1 of the strobe signal is determined to be 150 μs, and n
When t = 2, t 2 = 125 μs, and when n = 3, t 3 = 40
When μs and n = 4, t 4 = 20 μs.

FIG. 8 shows strobe pulse widths t1, t2.
From t3 and t4 and the data processing circuit 117 to the recording control unit 11
8 shows the relationship with the black ratio information 124 sent to the S. Basically, the pulse width of the second scan is smaller than that of the first scan, and the pulse width of the third scan is smaller than that of the second scan. However, when the black ratio is low, the thermal width of the thermal head is less likely to occur, and the pulse width is not so small in order to reliably print the isolated dots. In particular, when the black ratio is 0 to 15%, the pulse width is not changed in four scans.

When the pulse width of the strobe 129 to be energized is thus determined, in step S18, the corresponding strobe signal is output for the time determined in step S17. In step S19, it is checked whether power supply to the four blocks is completed. If not, the process returns to step S18, and the next block of heating elements is supplied with the same pulse width. When energization of the all the blocks is completed at step S19 advances to step S20, checks whether a total of four electric treatment (up to t 1 ~t 4) is completed as shown in FIG. 7, otherwise to step S21 Go to the counter n and add +1
Then, the process returns to step S17, and the above-described processing is repeated. In this way, when the energization process for four scans is completed in step S20, the recording process for one line is completed.

In the above-described first embodiment, the case of so-called multi-scan in which recording of one line is performed by four scans has been shown, but the present invention is not limited to such multi-scan. Here, an example is shown in which the width of one line is recorded in four lines of super fine in the standard mode.

When one line data is transmitted from the main control unit 101 in the facsimile apparatus of the second embodiment to the recording control unit 118 as shown in the flow chart of FIG. 5, recording is performed according to the flow chart shown in FIG. The control unit 18 operates.

FIG. 9 is a flow chart showing a process of recording one line in the standard mode with four lines of super fine by the recording control unit 118 in the second embodiment. In this example, four lines of super fine are actually recorded for one line of recording data transferred to the thermal head 10a in the standard mode. This recording process is started by receiving a recording command from the control unit 101.

First, in step S31, by the busy signal 125 input from the data processing circuit 117,
It is determined whether the recording data for one line has been transferred to the thermal head 10a. When the transfer is completed, the process proceeds to step S32, and "1" is set in the counter s. Next, in step S33, the latch signal 127 is output to the latch circuit 131 of the thermal head 10a to output the latch circuit 1
1 line data is latched at 31. And step S
In step 34, the ink sheet transport motor 40 is rotationally driven to transport the ink sheet 9 by 1 / n line,
In step S35, the recording paper conveyance motor 39 is rotationally driven so that the recording paper 2 is conveyed by one line. However,
The one line here means one line of super fine (1 / 15.4 mm).

Next, in step S36, the black ratio data 124 from the data processing circuit 117 is input, and in step S36.
In 37, the pulse width of the strobe signal is determined based on the value of the counter s and the black ratio data, as in step S17 described above. Then, in step S38, each block of the heating element 132 is energized. Steps S38 and S3
When the power supply to the four blocks is completed in step 9, the process proceeds to step S40, and it is determined whether the recording of four lines of super fine is completed. If recording of four lines of super fine has not been completed, the process proceeds to step S41, and the counter s is set to +.
Then, the process returns to step S34 to record the next line. However, the pulse width of the strobe signal during the recording of the next line is different from the pulse width of the strobe during the previous recording. The pulse width of the strobe signal on each line is determined as shown in FIGS.

FIG. 10 is a diagram showing the timing of energization of the thermal head 10a in the recording process of the second embodiment. Here, the heating resistor 132 of the thermal head 10a is used.
Is divided into four blocks and energized. Each of the strobe signals STB0 to STB3 corresponds to the energization signal of each block of the heating resistor 132 of the thermal head 10a, as in the case of FIG.

Each of t 5 , t 6 , t 7 , and t 8 represents the pulse width of each strobe signal of the 1st, 2nd, 3rd, and 4th lines of Superfine. These pulse widths are determined according to FIG. 11 based on the black ratio data 124 input from the data processing circuit 117. In this case, super fine recording for four lines is performed on the recording data for one line in the standard mode. The pulse width of the strobe signal basically decreases with each scan. By doing so, heat storage of the thermal head 10a is prevented.

FIG. 11 shows the pulse width t 5 of the strobe signal,
The relationship between t 6 , t 7 , and t 8 (μs) and the black ratio data 124 sent from the data processing circuit 117 to the recording control unit 118 is shown. Basically, the pulse width of the strobe signal is smaller in the second scan than in the first scan and in the third scan than in the second scan. However, 1
When the black ratio of the line is low, the pulse width of the strobe signal is not so small in order to prevent the thermal head 10a from accumulating heat and to reliably record the isolated dots. In particular, when the black ratio is 0 to 15%, the pulse width is not changed in four scans.

As described above, according to this embodiment, 1
By changing the pulse width of each strobe signal according to the black ratio of the line, it is possible to prevent the thermal head from accumulating heat and to completely reproduce the isolated dot when the black ratio is low.

[Explanation of Recording Principle (FIG. 12)] FIG. 12 is a diagram showing an image recording state when an image is recorded by reversing the conveying directions of the recording paper 2 and the ink sheet 9 in this embodiment.

As shown in the figure, the recording paper 2 and the ink sheet 9 are sandwiched between the platen roller 10b and the thermal head 10a, and the thermal head 10a is pressed by the spring 36 against the platen roller 10b with a predetermined pressure. ing. Here, the recording paper 2 is conveyed at the speed V P in the direction of arrow a by the rotation of the platen roller 10b. On the other hand, the ink sheet 9 is conveyed at a speed V I in the direction of arrow b by the rotation of the ink sheet conveying motor 40.

Now, the heating element 1 of the thermal head 10a
When 32 is energized from the power source 105, the portion of the ink sheet 9 indicated by the slanted portion 81 is overheated. Here, 9a indicates a base film of the ink sheet 9, and 9b indicates an ink layer of the ink sheet. The ink in the ink layer 81 that has been overheated by energizing the heating element 132 is melted, and a portion 82 thereof is transferred onto the recording paper 2. The transferred ink layer portion 82 corresponds to approximately 1 / n of the ink layer indicated by 81.

At the time of this transfer, it is necessary to generate a pre-cutting force on the ink at the boundary line 83 of the ink layer 9b and transfer only the portion indicated by 82 to the recording paper 2. The pre-breaking force differs depending on the temperature of the ink layer, and the higher the temperature of the ink layer, the smaller the pre-breaking force tends to be. Therefore, if the heating time of the ink sheet 9 is shortened, the front breaking force in the ink layer increases. Therefore, if the relative speed between the ink sheet 9 and the recording paper 2 is increased, the ink layer to be transferred is surely transferred from the ink sheet 9. Can be peeled off.

FIG. 13 is a sectional view of the ink sheet 9 for multi-printing.

The ink sheet 9 is configured so that ink transfer can be performed n times at the same portion in order to perform multi-printing as described above. Therefore, in this embodiment, as shown in FIG. 13, the first heat-resistant coating layer 9a and the second heat-resistant coating layer 9a
It is composed of four layers, namely, a base film layer 9b, a third ink layer 9c, and a fourth top coating layer 9d.

The heat-resistant coating layer 9a protects the base film 9b from the heat of the recording head 10a which is a thermal head. This heat resistant coat layer 9a is suitable for multi-printing in which heat energy for n lines may be applied to the same place (when heat generation information is continuous), but whether or not to provide this heat resistant coat layer 9a May be appropriately selected according to the recording method. It is effective to provide the heat resistant coat layer 9a on a base film having a relatively low heat resistance such as a polyester film.

The base film layer 9b of the second layer serves as a support for the ink sheet 9, and in the case of multi-printing, thermal energy is applied to the same location many times.
Aromatic polyamide film and capacitor paper, which have high heat resistance, are advantageous, but conventional polyester films can also be used. It is advantageous in terms of printing quality that these thicknesses are as thin as possible from the role of a medium, but strength must be taken into consideration and about 3 to 8 μm is preferable.

The third ink layer 9c is the recording sheet 2
Is a layer containing an amount of ink capable of being transferred n times. This ink component is a resin such as EVA as an adhesive, carbon black or nigrosine dye for coloring,
Carnauba wax, paraffin wax or the like as a binding material is used as a main component, and it is blended so as to withstand use n times at the same location. The sensitivity and density differ depending on the coating amount of the ink layer 9c, which may be selected arbitrarily, but is preferably about 4 g / m2 to 9 g / m2.

The fourth top coating layer 9d is formed on the recording sheet 2 in the non-recording area by the third ink layer 9d.
This is for preventing pressure transfer of c, and is generally composed of a transparent wax or the like. As a result, only the transparent top coating layer 9d is pressure-transferred to the recording sheet 2 in the non-recording portion, and the background stain of the recording sheet 2 is prevented.

The constitution of the ink sheet 9 is not limited to that of this embodiment. For example, the base layer serving as a support and the porous ink holding layer containing ink provided on one side of the base layer. Or a heat-resistant ink layer having a fine porous network structure formed on a base film, and the ink is contained in the ink layer.

As the material of the base film layer 9b, for example, polyimide, polyethylene, polyester,
It may be a film made of polyvinyl chloride, triacetyl cellulose, nylon or the like, or paper. Further, the heat-resistant coating layer 9a is not always necessary, but the material thereof may be, for example, silicon resin, epoxy resin, fluororesin, etrocellulose, or the like.

As an example of the ink sheet 9 having the heat sublimation ink, a guanamine resin and a fluorine resin are formed on a substrate made of polyethylene terephthalate, polyethylene naphthalate, aromatic polyamide film or the like. An ink sheet provided with a color material layer containing the spacer particles and the dye is described.

In this embodiment, the ink sheet 9 is loaded in the ink sheet cartridge E in order to facilitate handling.

The present embodiment has described the multi-print recording system in which the speed difference is provided between the recording paper and the ink sheet, and the ink of the ink sheet is transferred to the recording paper for printing. However, the same effect can be obtained even with a normal thermal transfer recording method.

The heating system in the thermal transfer printer is not limited to the thermal head system using the above-mentioned thermal head, and for example, an energization system or a laser transfer system may be used.

In this embodiment, an example in which a thermal head is used has been described, but the present invention is not limited to this, and the above-mentioned serial type thermal transfer printer may be used. In the present embodiment, the case of multi-printing has been described, but the present invention is not limited to this, and it is needless to say that the present invention can be applied to the case of normal thermal transfer recording using a one-time sheet. Further, in the above-described embodiment, the case where the thermal transfer printer is applied to the facsimile device has been described, but the present invention is not limited to this. For example, the thermal transfer recording device of the present invention is also applied to a word processor, a typewriter or a copying device. it can.

The recording medium is not limited to recording paper, but may be cloth, plastic sheet, or the like as long as it is a material capable of ink transfer. Further, the ink sheet is not limited to the roll configuration shown in the embodiment, and for example, the ink sheet is built in a detachable housing of the recording apparatus main body, and the ink sheet is detachably attached together with the enclosure in the recording apparatus main body. It may be a cassette type or the like. 14
Is the control unit 10 of the facsimile apparatus according to the third embodiment of the present invention.
In the block diagram showing the electrical connection between 1a and the recording unit 102, the same parts as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In the facsimile apparatus of the third embodiment,
The number of dots of serial recording data transferred to the thermal head 10a is counted by the data counting unit 150, and the result is input to the control unit 101a. When the black ratio of the line before recording is high, the recording start timing of the next line is delayed to compensate for the conveyance delay of the ink sheet and the recording paper after recording the line of high black ratio. ing. The details will be described later in detail with reference to the flowcharts of FIGS. 15 and 16.

A drive circuit 46 controls the pulse width of the strobe signal 47 for energizing each block of the heat generating element 132 of the thermal head 10a or adjusts the voltage 45 applied to the heat generating element 132 according to an instruction from the control unit 101a. And so on. As a result, the pulse width of the strobe signal 47, the applied voltage, and the like can be changed in accordance with the temperature of the thermal head 10a detected by the temperature sensor 59 so that optimum recording density can be obtained.
Further, in this embodiment, since the roll paper is used as the recording paper, for example, after the recording process for one page is completed,
A cutter 156 for cutting the recording paper in page units and a drive circuit 155 for driving the cutter 156 are provided. 157 is a sheet sensor for detecting whether or not a roll-shaped recording sheet is set.
Further, the driver circuit 119 for driving the recording paper transporting motor 39 of this embodiment has a control signal 15 from the control unit 101a.
3, 154, the rotational torque can be changed. Thus, for example, when a large shearing force is required between the ink sheet 9 and the recording paper due to the large number of black dots in one line, the torque can be increased to convey the recording paper.

The data counting section 150 inputs the serial recording data 122a and the shift clock 122b, and counts the number of black data "1" in the data included in one line thereof. This count value is input to the control unit 101a through the signal line 152. In addition, the signal line 151
Is a data counting unit 150 output from the control unit 101a.
A reset signal for resetting is transmitted.

Next, the operation of the facsimile apparatus according to the third embodiment of the present invention will be described with reference to the flow charts of FIGS. Note that the control program that executes this process is the ROM
It is stored in 114a. This process is started when the recording data of one line is prepared and the recording process of the next line becomes possible.

First, in step S51, one line of the decoded facsimile received image data or the image data input from the reading unit 100 is serially transferred to the thermal head 1.
0a. Thereby, in the data counting unit 150,
The number of black data included in the line is counted. Next, in step S52, the count value of the data counter 150 is read through the signal line 152 and stored in the work area NL of the RAM 115 (the number of black dots of the line to be recorded next is stored). Then, the latch signal 44 is output to latch the 1-line data held in the shift register 130 in the latch circuit 131. Next, in step S53, a reset signal is output to the signal line 151, and the data counting unit 1
Reset 50.

In step S54, the rotation of the ink sheet conveying motor 40 is started, and 1 / n of the ink sheet 9 is rotated.
The conveyance of a line is started, and in step S55, the recording paper conveyance motor 39 is likewise started to rotate to start the conveyance of one line of the recording paper. Next, in step S56,
The black dot number of the previous line stored in the PL of the RAM 115 is read and the black ratio of that line is obtained.

If the black ratio of the line is (1/4) or less, the process proceeds to step S58 and waits for 0.2 ms. On the other hand, if it is not (1/4) or less in step S56, it is checked in step S57 whether the black ratio of the previous line is (1/2) or less. When (1/2) or more, the process proceeds to step S60 and waits for 0.8 ms, and when (1/2) or less, step S5.
At 9, wait 0.6 ms. in this way,
By delaying the time until the recording of the next line is started according to the ratio of the black data of the previous line, the ratio of the black data of the previous line is high. However, the next recording start timing can be determined in consideration of the delay.

When the timing adjustment is completed in this way, the process proceeds to step S61, the contents of NL of the RAM 115 are transferred to PL, each block of the heating element 132 of the thermal head 10a is energized, and the recording operation is started in block units.
In step S62, it is checked whether or not the energization processing to all blocks is completed, and if not completed, step S63 is executed.
Proceed to and check if the next line data has been prepared. Next, the line data is prepared, and when it is ethyl, the process proceeds to step S64, and the serial data is transferred to the thermal head 10a in the same manner as step S51. This allows
The data counting unit 150 counts black data.
Next, in step S65, it is determined whether the energization time (about 600 μs) for one block of the thermal head has elapsed. If the time has not elapsed, the process returns to step S63, and if the time elapses, the process returns to step S61. Proceed to the energization process for the next block.

Thus, in step S62, it is checked whether or not the energization of all blocks of the thermal head 10a has been completed. When the energization process of all blocks is completed, step S6
In step 6, the timer 116 is set to 20 ms. Next, the process proceeds to step S67, and it is checked whether or not the recording process for one page is completed. If not completed, the process proceeds to step S68, and all the recording data of the next line is recorded in the thermal head 10.
It is determined whether the data has been transferred to a. If it has not been transferred, the process proceeds to step S69, the print data of the next line is transferred to the thermal head 10a, and it is determined in step S70 whether or not the auxiliary recording has been performed twice, and it is not performed twice. Occasionally, the process proceeds to step S71, and the heating element 132 of the thermal head 10a is
A strobe signal, which is shorter than that during normal recording, is applied to each block to generate heat and perform auxiliary recording.

On the other hand, when the data transfer to the thermal head 10a of the next line is completed in step S68, the process proceeds to step S72, and it is checked whether the timer 116 has timed out, that is, whether 20 ms has elapsed. .
When 20 ms or more has elapsed, the process proceeds to step S73,
In order to prevent the heating element 132 of the thermal head 10a from overcooling, the heating element 132 of the thermal head 10a is energized (preheated) and the process returns to step S52.

When the recording process for one page is completed in step S67, the process proceeds to step S74, the recording paper is conveyed by a predetermined amount so that the end portion of the page is at the cutting position by the cutter 156, and the cutter 156 is driven in step S75. And cut the recording paper. Then, in step S76, the recording paper is returned by a predetermined amount so that the leading portion of the recording paper comes close to the recording position, and the process ends.

FIG. 17 is a timing chart for explaining the processing shown in the flow charts of FIGS. 15 and 16.
Here, the heating element 132 of the thermal head 10a is divided into four blocks and energized. As in the case described above, the strobe signals STB0 to STB3 represent strobe signals that are supplied to each block of the thermal head 10a.

In FIG. 17, reference numeral 170 indicates the power supply timing to the thermal head 10a executed in step S73 immediately before the actual recording process indicated by 171. Further, T1 indicates the timing when all the print data of the next line is transferred to the thermal head 10a and the print processing of the next line becomes possible. Here, since the black ratio of the previous line is (1/4) or less, the conveyance of the ink sheet 9 and the recording paper is started at the timing T1, and after waiting for about 0.2 ms (step S58), the next line is The recording process of is started. Thus, in 171, one line is recorded. Reference numeral 172 shows two auxiliary recordings performed when the transfer of the next line to the thermal head 10a is not completed after the recording of one line is completed.

Timing T2 indicates the timing when the recording data of the next line is transferred to the thermal head 10a and recording of the next line becomes possible. At this time,
If the time ΔT is, for example, 20 ms or more after the recording process shown in 171 is completed, the preheating in step S73 is performed as shown in 173.

Here, if the black ratio of one line recorded by the recording process indicated by 171 is (1/4) to (1/2),
Recording processing 174 for the next line is started 0.6 ms (step S59) after the timing T3. After the recording process 174 is completed in this way, at timing T4, all of the recording data of the next line has been transferred to the thermal head 10a, so as indicated by 175, the auxiliary heating is completed once. In this case, it goes without saying that the preheating indicated by 173 is not performed. And 17
Since the black ratio of the line recorded in No. 4 is (1/2) or more, the time from the timing T4 until the recording of the next line is started is 0.8 ms (step S60).

Reference numeral 176 shows the amount of movement of the recording paper conveyed along with the above-mentioned recording operation.

In the above-described third embodiment, the wait time from the start of recording paper conveyance in step S55 to the start of recording in step S61 is set in three stages according to the black ratio of the previous line. Besides, thermal head 10a
The information from the temperature sensor 59 that detects the temperature of 1 is considered. In other words, when the temperature of the thermal head 10a is high, the ink sheet 9 is kept in the thermal head 10a even if the heating element 132 of the thermal head 10a is not energized.
It is considered that the recording paper and the ink sheet 9 are easily separated because they are heated by the heat storage of a. Therefore, in such a case, it is advisable to set the standby time set in steps S58 to S60 short, and conversely set the standby time long when the temperature of the thermal head 10a is low.

Further, as described above, if the driver circuit 119 can be controlled by the control signal 154 to change the torque of the motor, the driver circuits 119, 39 for the recording paper transport motor 39 and the ink sheet transport motor 40 can be used. 12
When the temperature of the thermal head 10a is low and the black ratio of the previous line is high, the current value for driving the motor is increased to increase the transport drive amount.
When the temperature of a is low and the black ratio of the previous line is low, the current value for driving the motor is reduced to reduce the drive amount, so that the setting of the standby time can be made constant. .

Further, in the above-described third embodiment, step S
When the timer 116 times out in 72, the preheating is performed in step S73. When such preheating is performed, both the recording sheet and the ink sheet 9 are warmed, and the ink sheet 9 and the recording sheet are not heated. Easy peeling. Therefore, in such a case, the setting of the waiting time before the start of recording the next line (steps S58 to S60) may be shortened.

As described above, according to the third embodiment,
By delaying the recording timing of the next line according to the ratio of the black data of the previous line, it is possible to record an image with high image transfer efficiency and high quality.

Further, by facilitating the separation of the ink sheet and the recording paper, it is possible to prevent the ink sheet from being damaged due to the sticking of the ink sheet and the recording paper.

Next, a fourth embodiment of the present invention will be described. In the fourth embodiment, a facsimile apparatus capable of accurately determining a jam of recording paper will be described. FIG.
Is a diagram showing a schematic configuration of a facsimile apparatus according to a fourth embodiment of the present invention. Portions common to the above-mentioned drawings are omitted or indicated by the same numbers, and their explanations are omitted.

In FIG. 18, reference numeral 180 denotes a side plate of the apparatus, and 182 denotes a roll-shaped heat-sensitive recording paper held on the side plate 180 by a support member or the like not shown. 1
Reference numeral 83 denotes a platen roller, which is driven to rotate by the recording paper conveyance motor 39 and conveys the recording paper in the cutter 156 direction or in the reverse direction. 184 and 185
Is a paper guide for guiding the recording paper sent from the platen roller 183 to the cutter 156. 186,
Reference numeral 187b forms a recording paper sensor, and 186a is a light emitting element and 186b is a light receiving element. As a result, when there is no recording paper, the light receiving element 186b detects the light from the light emitting element 186a and outputs the signal "1".

Reference numeral 187 denotes a recording paper jam detector, which is composed of a reflection type sensor having a light emitting light source and a light receiving element.
That is, the light emitted from the light emission source of the jam detector 187 is emitted to the platen roller 183 side, and the reflected light is detected. If there is a recording paper jam,
The recording paper is wrapped around the platen roller 183,
When the reflected light from 2 is input, it outputs the signal "1",
The control unit 101b is notified that a jam has occurred. The jam detector 183 is configured to be movable in the main scanning direction according to an instruction from the control unit 101b.
Along with the movement, the wrapping of the recording paper in each part of the platen roller 183 is detected. Reference numeral 190 denotes a paper discharge tray, which organizes and stores the recording paper cut and discharged by the cutter 156.

A dot detection circuit 188 has at least 1
It has a memory capacity capable of storing dot data for a page, calculates the ratio of the number of black dots in the area according to the signal output from the control unit 101b, and outputs the result.
That is, the dot detection circuit 188 uses the print data 122
a and the shift clock 122b are input to store the recording data for one page. Then, the control unit 101b outputs the line number to the signal line 188a,
When the number of lines is output to each of b and 188c, the line before the line (for example, b) output to the signal line 188b in the sub-scanning direction from the line (for example, a) output to the signal line 188a. From, the print data up to the line after the number of lines (for example, c) output to the signal line 188c is extracted. For the data in the main scanning direction, 10 dots before the current dot position
By extracting the data of the area up to the dot destination, the black ratio in a rectangular area having a length of 20 dots in the main scanning direction and a length of (b + c) lines centered on the line a in the sub scanning direction is obtained. When the black ratio is 30% or less, it is determined to be a white region, and the determination result is output to the control unit 101b via the signal line 188d.

As a result, for example, although the recording paper is wound around the platen roller 183 and a jam occurs, the light emitted from the light emitting element of the recording paper jam detector 187 is recorded on the recording paper as black. This is to eliminate the problem that the reflected light is judged to be the reflected light from the platen roller 183 because it is radiated to a portion and the jam of the recording paper cannot be detected.

The operation of the facsimile apparatus according to the fourth embodiment of the present invention will be described below with reference to the flowcharts of FIGS.

First, in step S81, the NCU 107 is instructed to turn off the CML. In step S82, initialization processing such as alarm off and cutter 156 off is executed, and the flow advances to step S83 to set the jam detector 187 at a substantially central position (864 dots) of A4 size.
Next, in step S84, it is determined whether or not reception is selected. If it is not reception, the process proceeds to step S85, it is checked whether or not the output of the proxy reception is selected, and if so, the process proceeds to step S86 to print the recording paper. Check if it is set. When the recording paper is set and the recording paper is not jammed in step S87, the process proceeds to step S88, the received data stored in the RAM 115 is read and decoded, and the result is recorded on the recording paper (step S88). S
89). After execution of step S89, or step S8
If the determination in 5 to S87 is "NO", the process proceeds to step S90, the process instructed at that time is executed, and the process returns to step S81.

When reception is selected in step S84, the process proceeds to step S91, CML is turned on, and step S92 is performed.
Perform the previous steps with. Next, in step S93, it is determined whether or not the jam detector 187 has detected a jam of the recording paper. When the jam of the recording paper is detected, the process proceeds to step S94, the received information is stored in the RAM 115, the post-procedure is executed in step S95, and step S9 is performed.
The display unit 104 displays that the proxy reception was made in 6. When the memory reception is completed in this way, the process returns to step S81 again.

On the other hand, in step S93, the jam detector 18
When the jam of the recording paper is not detected by 7, the process proceeds to step S100 (FIG. 20). In step S100, it is determined whether or not the current reception mode is the standard mode, and if it is not the standard mode, it is determined in step S101 whether it is the fine mode. In the standard mode, step S102
Output 10 × 3.85 to the signal line 188a, and (20 × 3.85 +) to the signal line 188b in step S103.
5) The line is output, and the signal line 18 is output in step S104.
The (20 × 3.85-5) line is output to 8c.

In the fine mode, step S
108, 10 × 7.7 is output to the signal line 188a, and (20 × 10) is output to the signal line 188b in step S109.
7.7 + 10) lines are output, and in step S110, (20 × 7.7-10) lines are output to the signal line 188c. If neither the standard mode nor the fine mode is selected, the process proceeds to step S105, and the signal line 188a receives 10 × 1
5.4 is output, and the signal line 188b is output in step S106.
(20 × 15.4 + 20) lines are output to the signal line 188c (20 × 15.4 + 20) in step S107.
0) Output line. As a result, the dot detection circuit 18
8, the black ratio of the rectangular area corresponding to the specified area is calculated, and when the black ratio is 30% or less, information indicating a white area is output to the signal line 188d.

Next, in step S111, the RAM 11
5, the number of reference lines output to the signal line 188a is set in the line counter provided in FIG.
To receive and record image signals. Next in step S113
Next, it is checked whether the receiving process for one page is completed. When the receiving process is completed, the process proceeds to step S114, the cutter 156 is driven to cut the recording paper page by page, and the intermediate procedure is executed at step S115. Step S116
Proceed to. If there is received data for the next page in step S116, the process returns to step S111. If not, the post-procedure is executed in step S117 and the process returns to step S81.

When the reception processing for one page is not completed in step S113, the process proceeds to step S120 (FIG. 21), and the black ratio is 30% at all positions on the line where the jam detector 187 is currently located. The above, that is, whether or not there is a non-white area is checked by setting various data in the dot detection circuit 188 and based on the output signal 188d. When the white area is not detected at all the positions of the line where the jam detector 187 is currently located, the jam detector 187 moves to the white area to check whether or not the jam really occurs. Step S1 because there is no
23, it is determined whether or not the recording of one line is completed, and when it is completed, the value of the line counter is decremented by -1 in step S124, and the value of the line counter is "0" in step S125. Determine whether When the value of the line counter is not "0", the process returns to step S112 and the above-mentioned operation is executed. On the other hand, when the value of the line counter is "0", the process proceeds to step S126, and the recording paper sensors 186a and 186 determine whether the recording paper is in the jam state (whether the recording paper can be detected), and the jam occurs. When the output is “1” (sensor 186b output is “1”), step S1
Proceed to 27. On the other hand, when there is no abnormality, the process proceeds to step S111, and the above-mentioned processing is executed.

If it is determined in step S120 that there is a white area, the process proceeds to step S121, and the jam detector 1
87 is moved in the main scanning direction to the position where the nearest white area exists. Then, in step S122, it is determined whether the platen roller 183 is detected or the white portion of the recording paper is detected. When the white portion is detected (when a jam is detected), the recording paper is wrapped around the platen roller 183. If it is determined and the process proceeds to step S127, if not, the process proceeds to step S111 and the above-described processing is executed.

In step S127, the excitation of the recording paper carrying motor 39 is switched to set the platen roller 183 to 3 times.
cm minutes (2 cm when recording only 2 cm, for example)
Only reversely rotate and return the recording paper. Next, at the position of the jam detector 187 at this time, the dot detection circuit 188 finds the closest area where the black ratio is 30% or less, and moves the jam detector 187 to that position. In step S129, it is determined whether or not the user can move, and if so, step S1
In step 30, the same as step S122, it is checked whether a jam is detected. When no jam is detected, the process proceeds to step S131, the recording paper is advanced by the amount returned in step S127, and the process returns to step S111.

In step S129, the jam detector 187 is detected.
If it cannot be moved to the white area, step S140 (see FIG. 2).
Proceeding to 2), the recording paper is returned until the jam detector 187 is positioned at the line (obtained by the dot detection circuit 188) in which the white area exists, and in step S141, the jam detector 187 is set to the white area closest to the line. To move.
Then, the process proceeds to step S142 and the above-mentioned step S12.
Similarly to step 2 (or step S130), it is determined whether or not a jam has occurred, and when it does not occur (when black is detected), the process proceeds to step S143 and step S1.
27, the recording paper is returned by step S140, and the recording paper is advanced forward, and the process proceeds to step S111.

When the occurrence of a jam is detected in step S142 (white is detected), the process proceeds to step S144,
After performing the post-procedure, the CML is turned off in step S145, and the recording paper is cut using the cutter 156 in step S146. Next, the procedure proceeds to step S147, the alarm is sounded for 10 seconds, and the procedure returns to step S81.

Although the jam detector 187 is moved in the main scanning direction in the above-described embodiment, a plurality of jam detectors 187 are used.
It is also possible to perform the same processing by providing.

Further, in the above-described embodiment, the recording paper of the predetermined length is returned, and when all the positions corresponding to the line are not in the white area, the recording paper is again sent forward, and at that time, the recording paper is jammed. If not, it may be determined that the jam of the recording paper has been released.

Further, in the above-mentioned embodiment, the ratio of the black ratio for judging whether it is a white area is not limited to 30%, and an arbitrary value can be set. Although the recording paper is considered to be roll paper, it may be cut paper as in the first or second embodiment described above.

Further, when the jam of the recording paper is released,
"Record paper jam occurred" is printed on the recording paper, printing of the page is completed, and the recording paper is cut. Then, the record data from the beginning of the previous page may be printed as new page information from the beginning of the next page.

This processing is shown in the flowchart of FIG. Here, following step S131 in FIG. 21, information indicating jam occurrence is printed on the recording paper in step S150, and the recording paper is conveyed and cut by the cutter 156 in step S151. Next, the process proceeds to step S152, recording is performed from the leading information of the reception of the previous page, and the process proceeds to step S111.

As described above, according to the fourth embodiment,
Since the detector for detecting the jam of the recording paper is moved to the portion of the recording paper where the black information is small to detect the presence or absence of the jam, it is possible to accurately detect the occurrence of the jam of the recording paper.

Further, since it is possible to automatically recover from the jam of the recording paper, there is an effect that its operability is enhanced.

The present invention may be applied to a system composed of a plurality of devices or an apparatus composed of a single device. Further, the present invention can of course be applied to a case where the present invention is achieved by supplying a program for implementing the present invention to a system or an apparatus.

[0113]

As described above, according to the present invention, it is possible to completely reproduce even an isolated dot when the black ratio is low while preventing the heat accumulation of the recording head.

Further, according to the present invention, the recording quality can be improved by delaying the recording timing at the time of recording the line next to the line having a high black ratio.

Furthermore, according to the present invention, there is an effect that a jam of the recording medium can be accurately detected.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical connection between a control unit and a recording unit of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a facsimile apparatus of this embodiment.

FIG. 3 is an external perspective view of the facsimile apparatus of this embodiment.

FIG. 4 is a side sectional view of the facsimile apparatus of this embodiment.

FIG. 5 is a flowchart showing a recording process for one page by the control unit of the facsimile apparatus of the first embodiment.

FIG. 6 is a flowchart showing a recording process for one line of the recording control unit of the facsimile apparatus of the first embodiment.

FIG. 7 is a timing chart showing the timing of energization of the thermal head of the facsimile apparatus of the first embodiment.

FIG. 8 is a diagram showing the relationship between the black ratio of one line and the pulse width of the strobe signal at each scan in the facsimile apparatus of the first embodiment.

FIG. 9 is a flowchart showing a recording process for one line of a recording control unit of the facsimile apparatus according to the second embodiment of the present invention.

FIG. 10 is a timing chart showing the timing of energization of the thermal head of the facsimile apparatus of the second embodiment.

FIG. 11 is a diagram showing the relationship between the black ratio of one line and the pulse width of the strobe signal at each scan in the facsimile apparatus of the second embodiment.

FIG. 12 is a diagram showing an image recording state when an image is recorded by reversing the conveyance direction of the recording paper and the ink sheet in the facsimile apparatus of the present embodiment.

FIG. 13 is a cross-sectional view of an ink sheet used for multi-printing according to this embodiment.

FIG. 14 is a block diagram showing an electrical connection between a control unit and a recording unit of a facsimile apparatus according to a third embodiment of the present invention.

FIG. 15 is a flowchart showing a recording process in the facsimile apparatus of the third embodiment.

FIG. 16 is a flowchart showing a recording process in the facsimile apparatus of the third embodiment.

FIG. 17 is a timing chart showing the operation timing at the time of recording processing in the facsimile apparatus of the third embodiment.

FIG. 18 is a block diagram showing a schematic configuration of a control unit and a recording unit of a facsimile apparatus according to a fourth embodiment of the present invention.

FIG. 19 is a flowchart showing the operation of the facsimile apparatus of the fourth embodiment.

FIG. 20 is a flowchart showing the operation of the facsimile apparatus of the fourth embodiment.

FIG. 21 is a flowchart showing the operation of the facsimile apparatus of the fourth embodiment.

FIG. 22 is a flowchart showing the operation of the facsimile apparatus of the fourth embodiment.

FIG. 23 is a flowchart showing an operation of a facsimile apparatus which is a modified example of the fourth embodiment.

[Explanation of symbols]

 2 Recording Sheet 9 Ink Sheet 10a Thermal Head 39 Recording Paper Conveying Motor 40 Ink Sheet Conveying Motor 59 Temperature Sensor 101, 101a, 101b Control Unit 102, 102a Recording Unit 103 Operation Unit 113 CPU 114, 114a, 114b ROM 115 RAM 117 Data processing circuit 118 Recording control unit 122a Serial recording data 122b Shift clock 132 Heating element 150 Data counting unit 151,152 Signal line 156 Cutter 183 Platen roller 187 Jam detector 188 Dot detection circuit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI Technical display location B41J 29/46 C 9113-2C 29/48 E 9113-2C H04N 1/032 D 8721-5C

Claims (7)

[Claims]
1. A recording apparatus for recording an image on a recording medium by energizing a recording head, comprising recording medium conveying means for conveying the recording medium, and energizing a recording element of the recording head plural times. Recording means for recording a predetermined amount of image on the recording medium, counting means for counting the number of black information of the image data recorded by the recording means, the number of black information counted by the counting means and the number of energization And a control unit that controls the energy applied to the recording head by the recording unit in response thereto.
2. A recording apparatus for recording an image on a recording medium by energizing a recording head, comprising: recording medium conveying means for conveying the recording medium; and energizing recording elements of the recording head to record the recording medium. A recording unit for recording an image on a line-by-line basis, a counting unit for counting the number of black information of the image data recorded by the recording unit, and according to the number of black information of the previous line counted by the counting unit. A recording device, comprising: a control unit that controls the recording timing of the next line.
3. A recording apparatus for recording an image on a recording medium by energizing a recording head, the recording medium conveying unit conveying the recording medium by rotation of a roller, and winding the recording medium around the roller. A detection unit for detecting a jam state by detecting the detection state, the detection state by the detection unit, and the correctness of the detection result by the detection unit according to the recording state of the recording medium detected by the detection unit. A recording device comprising: a determination unit.
4. The detecting means can move on the recording medium, and the judging means moves the detecting means to an area on the recording medium where a recording amount is small to judge whether a jam is present. The recording device according to claim 3.
5. A facsimile device for recording an image on a recording medium by energizing a recording head, the facsimile device for recording an image on a recording medium, the original image being read. Image reading means, transmitting / receiving means for transmitting / receiving image signals, recording medium conveying means for conveying the recording medium, and recording for recording a predetermined amount of image on the recording medium by energizing recording elements of the recording head a plurality of times. Means, counting means for counting the number of black information of the image data recorded by the recording means, and applying to the recording head by the recording means according to the number of black information counted by the counting means and the number of energization And a control unit for controlling the stored energy.
6. A facsimile apparatus for energizing a recording head to record an image on a recording medium, the image reading unit reading an original image, the transmitting / receiving unit transmitting / receiving an image signal, and the recording conveying the recording medium. Medium conveying means, recording means for energizing recording elements of the recording head to record an image on the recording medium line by line, and counting means for counting the number of black information of image data recorded by the recording means And a control unit for controlling the recording timing of the next line according to the number of black information of the previous line counted by the counting unit.
7. A facsimile apparatus for energizing a recording head to record an image on a recording medium, the recording medium conveying unit conveying the recording medium by rotation of a roller, and winding the recording medium around the roller. A detection unit for detecting a jam state by detecting the detection state, the detection state by the detection unit, and the correctness of the detection result by the detection unit according to the recording state of the recording medium detected by the detection unit. A facsimile apparatus comprising: a determination unit.
JP29692592A 1992-11-06 1992-11-06 Recording apparatus, facsimile apparatus using the apparatus, and method for detecting jam state thereof Expired - Fee Related JP3524111B2 (en)

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