WO2019017514A1 - Printing device and method having medium thickness calculation function - Google Patents

Abstract

The present invention relates to a printing device having a medium thickness calculation function, comprising: a feeding unit for feeding a printing medium; a collection unit for collecting the printing medium; a head unit which is provided between the feeding unit and the collection unit and records an image on the printing medium; a control unit for controlling operations of the feeding unit, the collection unit, and the head unit; and a thickness detection unit provided adjacent to the feeding unit to detect the thickness of the printing medium.

Description

Printing apparatus and method having medium thickness calculating function

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a printing apparatus and a printing method having a medium thickness calculating function, and more particularly to a printing apparatus having a medium thickness calculating function for real- A printing apparatus, and a printing method.

Digital printing refers to a technique of directly processing data to be output without directly intervening processes such as film processing in a conventional off-set printing method, and directly outputting the data to a printing machine.

Currently, the printing market is rapidly changing from the conventional manual printing method to the digital printing method, and the issue of improving the quality of the printed result and improving the printing speed due to the improvement of the manufacturing technology of the printing device is gradually increasing.

Here, a print head alignment technique for precisely positioning and fixing the print head for high-quality printing, a print medium supply and recovery control technique for keeping the tension applied to the print medium placed on the supply side and the recovery side constant, A print medium position correcting technique for detecting and correcting the width direction displacement of the ink droplet, and ink jetting control and hardening related technologies.

An object of the present invention is to provide a printing apparatus and a method provided with a medium thickness calculating function capable of producing a high quality printing result of a predetermined quality or higher even when the thickness of a fine printing medium is changed by real- I have to.

In the past, the operator had to check the thickness of the printing medium and adjust the printing parameters according to the thickness. Therefore, it was difficult to accurately measure the thickness and the printing parameters could not be finely adjusted. In the present invention, And automatically optimizes the printing parameters and reflects them in the printing process.

Further, the automatic process improves the inefficiency in the conventional manual work, thereby shortening the work time and improving the work efficiency.

The above object is achieved according to the present invention by providing a printing apparatus comprising: A recovery unit for recovering the print medium; A head unit installed between the supply unit and the recovery unit and recording an image on a print medium; And a control unit for controlling driving of the supply unit, the recovery unit, and the head unit. And a thickness detecting function for detecting a thickness of the printing medium, the printing apparatus being provided adjacent to the supplying section, and having a medium thickness calculating function.

Here, the thickness detector may be provided by a camera, and the controller may analyze the image information transmitted from the camera through image processing to detect the thickness of the print medium.

Alternatively, the thickness detecting unit may be provided on one of a plurality of media transport rollers provided between the supply unit and the head unit.

Here, the thickness detecting unit may include a first encoder which is installed to rotate in conjunction with the medium feeding roller in contact with one side of the medium feeding roller, and a second encoder which is installed to rotate in conjunction with the medium feeding roller via the printing medium, Encoder.

Here, the control unit is configured to detect the thickness of the printing medium by comparing the pulse value of the first encoder generated by the rotation of the medium feeding roller with the pulse value of the second encoder.

Meanwhile, the control unit may generate a corresponding printing parameter according to a change in thickness of the printing medium detected based on the real-time sensing information transmitted from the thickness detecting unit, and apply the printing parameter to the printing process.

Here, the controller may be configured to vary the operation of the head unit according to the thickness of the print medium detected based on the real-time sensing information transmitted from the thickness detector.

Here, the controller may be configured to vary the position of the head unit according to the thickness of the print medium detected based on the real-time sensing information transmitted from the thickness detector.

Alternatively, the controller may be configured to vary the supply amount of ink supplied to the head unit according to the thickness of the print medium detected based on the real-time sensing information transmitted from the thickness detecting unit.

Alternatively, the controller may be configured to vary the amount of ink ejected from the head according to the thickness of the print medium detected based on the real-time sensing information transmitted from the thickness detector.

Alternatively, the controller may be configured to vary an ejection speed of the ink ejected from the head according to the thickness of the print medium detected based on the real-time sensing information transmitted from the thickness detector.

According to another aspect of the present invention, there is provided a printing apparatus comprising: a print medium supply step of supplying a print medium from a supply unit; An image recording step of recording an image on a print medium supplied from the supply unit in the head unit; And a print medium recovery step of recovering a print medium on which an image is recorded from the head unit through a recovery unit; Detecting a printing medium thickness between the printing medium supplying step and the image printing step for detecting a thickness of the supplied printing medium in a thickness detecting unit; Can be accomplished by a printing method having a medium thickness calculating function to be performed.

Here, in the step of detecting the thickness of the print medium, the thickness of the print medium is photographed in real time and transmitted to the control unit. The control unit analyzes the image information transmitted from the camera through image processing to detect the thickness of the print medium Lt; / RTI >

Alternatively, the step of detecting the thickness of the print medium may be a step of detecting the thickness of the print medium by comparing the pulse values detected by the first and second encoders provided adjacent to the medium transport roller provided between the supply unit and the head unit, have.

Here, the first encoder is installed to rotate in conjunction with the medium feed roller in contact with one side of the medium feed roller, and the second encoder is installed to rotate in conjunction with the medium feed roller through the print medium at the other side of the medium feed roller do.

Meanwhile, the real-time thickness information of the print medium detected through the print medium thickness detection step is transmitted to the control unit, and the control unit is adapted to generate the corresponding print parameters according to the real-time thickness change of the print medium and apply the generated print parameters to the printing process .

Here, the real-time thickness information of the printing medium detected through the printing medium thickness detecting step is transmitted to the control unit, and the control unit may vary the operation of the head unit in the image recording step according to the real- do.

Here, the image recording step may include: a position changing step of changing a position of the head part; A supply amount varying step of varying a supply amount of ink supplied to the head part; A variable injection amount step of varying an injection amount of ink injected from the head part; And a jetting speed varying step of varying jetting speed of the ink jetted from the head portion.

The present invention may also be embodied by a computer-readable recording medium having stored thereon a program for performing the printing method.

According to the present invention, the thickness of the print medium on the supply side can be detected in real time and reflected in the printing process, so that a high-quality printed product with a predetermined or higher thickness can be produced even when the thickness of the fine print medium is changed.

In the past, since the operator confirmed the thickness of the printing medium and adjusted the printing parameters according to the thickness of the printing medium, it was difficult to precisely measure the thickness of the printing medium. Moreover, the printing parameters could not be finely adjusted. This conventional problem can be solved by automatically optimizing the printing parameters and reflecting them in the printing process.

In addition, the automatic process improves the inefficiency in the conventional manual work, thereby shortening the working time and improving the work efficiency.

1 is a schematic view showing an embodiment of a printing apparatus having a medium thickness calculating function according to the present invention,

2 is a schematic view showing another embodiment of a printing apparatus having a medium thickness calculating function according to the present invention,

3 is a flowchart of a printing method having a medium thickness calculating function according to the present invention,

FIG. 4 is a block diagram showing steps included in an image recording step in a printing method having a medium thickness calculating function according to the present invention.

Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.

In the following description, detailed description of related arts will be omitted if it is determined that the gist of the present invention may be unnecessarily blurred. In addition, numerals (e.g., first, second, etc.) used in the description of the present invention are merely an identifier for distinguishing one component from another.

In other words, the terms used in the specification and claims should not be construed in a dictionary meaning, and the inventor may, on the principle that the inventor can properly define the concept of a term in order to explain its invention in the best way, And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention.

Therefore, the embodiments shown in the present specification and the drawings are only exemplary embodiments of the present invention, and not all of the technical ideas of the present invention are presented. Therefore, various equivalents It should be understood that water and variations may exist.

<Printing Apparatus Having Media Thickness Calculation Function>

Hereinafter, a printing apparatus having a medium thickness calculating function according to the present invention will be described in detail with reference to the drawings.

Fig. 1 is a schematic view showing an embodiment of a printing apparatus having a medium thickness calculating function according to the present invention. Fig. 2 is a schematic view showing another embodiment of a printing apparatus having a medium thickness calculating function according to the present invention. Fig.

1 and 2, a printing apparatus having a medium thickness calculating function according to the present invention includes a supplying unit 10, a collecting unit 20, a head unit 30, a control unit 40, and a thickness detecting unit 50 ). 1 and 2, the printing apparatus is a single-pass type printing apparatus in which the printing medium is moved while the head unit is fixed and the printing medium is moved to the lower side of the head unit. However, the present invention is not limited thereto, It is needless to say that the technical idea of the present invention can be applied to various printing apparatuses such as a multi-pass type printing apparatus in which printing is performed while the head unit is repeatedly moved left and right or an ink jet printer or a digital printing press to be.

The entire printing process of the printing apparatus is supplied with the printing medium m from the supply unit 10 and the image is printed on the printing medium m by jetting the ink onto the printing medium m supplied from the head unit 30 And a print medium m on which an image is recorded is retrieved through the recovery unit 20. The control unit 40 may be provided to control the operation and the driving of each of the above structures.

The feeding section 10 is configured to feed the printing medium m to the head section 30 and includes a feeding roller wound with the printing medium m and a plurality of A medium conveying roller 52 and a motor and a drive control unit for providing a driving force to the feeding roller.

The recovery unit 20 is configured to recover the print medium m from the head unit 30. The recovery unit 20 removes the print medium m from the head unit 30, a plurality of medium conveying rollers 52 for conveying the recording medium m, and a motor and a drive control unit for providing a driving force to the collection roller.

1 and 2, the supply and collection rollers constituting the supply unit 10 and the recovery unit 20 and the plurality of medium conveyance rollers 52 are shown to be provided symmetrically in correspondence with each other, but the present invention is not limited thereto , And the positions and the number of the rollers may be provided in various forms according to the quality of the printing result and the setting items in the printing process. The feeding unit 10 and the collecting unit 20 are also provided with parts and units such as various position correcting mechanisms for controlling the position, feeding speed and tension of the printing medium m supplied and collected, a feeding speed controlling mechanism, But the other parts of the printing apparatus are the same as those in the known art, and a detailed description thereof will be omitted.

The head unit 30 is a component that performs a role of recording an image on the supplied print medium m and is provided between the supply unit 10 and the recovery unit 20 and includes a print unit A sensor for detecting the position of the medium m, and a plurality of conveying rollers for conveying the print medium m from below the head portion 30. [

The control unit 40 controls the overall operation of the supplying unit 10, the collecting unit 20 and the head unit 30. The control unit 40 receives the sensing values from the thickness detecting unit 50 to be described later, An information processing unit, an MCU, an arithmetic unit, and the like in a structure that is analyzed and processed and reflected in the drive control of the supply unit 10, the collection unit 20, and the head unit 30. [

The thickness detecting unit 50 is a characteristic component of the present invention and serves to detect thickness information of the print medium m at a specific point in time. As shown in Figs. 1 and 2, Respectively.

The reason why the thickness detecting portion 50 is provided adjacent to the supplying portion 10 is that the thickness information of the printing medium m before printing is determined and the control portion 40 controls the operation of the printing medium m The printing medium m is curved with respect to the longitudinal direction by adjusting the control of the printing mediums (or the like) or the printing medium m having a different thickness depending on the medium characteristics.

Hereinafter, an embodiment of the thickness detector 50 according to the present invention will be described in detail with reference to FIGS. 1 and 2. FIG. However, the configuration of the thickness detector 50 of the present invention is not limited to the method described below, and it is needless to say that the thickness detector 50 may be configured in various forms to detect the real time thickness of the print medium m.

Fig. 1 shows an embodiment in which the thickness detecting section 50 according to the present invention is adopted as a camera 51. Fig.

The thickness detector 50 is provided in the camera 51 and acquires the side image information of the supplied print medium m. The photographed image information is input to the controller 40, The thickness of the printing medium m is detected by analyzing the input image information through image processing. That is, the control unit 40 analyzes and processes the side image information of the transferred print medium m through image processing, separates and discriminates the print medium m and the background in the image information, and compares the print medium m with the reference value The thickness formed by the discriminated print medium m can be discriminated. In this case, the control unit 40 may analyze the side image information of the transferred print medium m in real time, measure the thickness information for all sections of the print medium m, and reflect the thickness information on the printing process value , The thickness measurement may be performed only when the thickness of the sheet exceeds a predetermined thickness range in order to prevent an overload on the analysis and calculation of the control unit 40 so as to be reflected in the printing process value.

Fig. 2 shows an embodiment in which the thickness detector 50 according to the present invention is adopted as a plurality of encoders 53 and 54. Fig.

The thickness detecting section 50 is provided with two first and second encoders 53 and 54 provided adjacent to one of the plurality of medium conveying rollers 52 provided between the feeding section 10 and the head section 30 And the first and second encoders 53 and 54 are preferably provided as rotary encoders. The rotary encoder outputs the amount of mechanical displacement in the rotation direction as a digital value in the form of a pulse value, and outputs a pulse value proportional to the rotation angle of the encoder.

Specifically, the first encoder 53 is disposed to directly contact one side of the medium conveying roller 52 to rotate in conjunction with the rotation of the medium conveying roller 52, and the second encoder 54 is provided to rotate the medium conveying roller 52, And is interlocked with the medium feeding roller 52 via the print medium m.

More specifically, as the first encoder 53 is in contact with the medium conveying roller 52 to rotate interlockingly, the second encoder 54 rotates in conjunction with the medium conveying roller 52 via the print medium m, The amount of rotation (output pulse value) of the first encoder 53 and the second encoder 54 is different by the thickness of the printing medium m with respect to the rotation of the conveying roller 52, The thickness of the printing medium m is finally detected.

That is, the control unit 40 compares the pulse value of the first encoder 53 generated by the rotation of the medium feeding roller 52 with the pulse value of the second encoder 54 to detect the thickness of the print medium m .

Here, the first and second encoders 53 and 54 are an incremental system for integrating pulses generated in response to the rotation angle from the measurement start point according to the measurement and the operation method, an absolute angle of one rotation or multiple rotation Absolute method to measure the position, photoelectric system that outputs light pulse information through the slit by irradiating light to a slit plate having a scale, and detecting the change of periodic magnetic field The first and second encoders 53 and 54 of the same type can not be selected as a combination of the magnetic system of the first type and the electrostatic capacity, or the other system of outputting the pulse value through electrical induction, Should be selected.

On the other hand, the control unit 40 generates a corresponding printing parameter according to the thickness variation of the printing medium m measured based on the real-time sensing information transmitted from the thickness detecting unit 50, and applies the printing parameter to the printing process.

Specifically, the control unit 40 may be configured to vary the operation of the head unit 30 according to the thickness of the print medium m detected based on the real-time sensing information transmitted from the thickness detector 50. [ The method of varying the operation of the head unit 30 can be implemented in various forms. The method of varying the position of the head unit 30 through a structure such as a cylinder for displacing the height of the head unit 30, A configuration in which the supply amount of ink supplied to the head part 30 is varied by adjusting the pressure of the ink supply tank and the supply line implemented in the head part 30, And the ink amount of the ink jetted onto the print medium m from the head unit 30 and the shape of varying the jetting speed.

That is, the control unit 40 acquires the thickness sensing information of the print medium m supplied from the thickness detecting unit 50 (image information through a camera or pulse value information through two encoders) to the control unit 40, (M) having different thicknesses by calculating the thickness information of the print medium (m) at a specific point in time or the entire section and by reflecting the change in the printing process value or the operation of the head unit (30) It is possible to secure a constant printing quality on the printing medium.

Further, by controlling the configuration through the control unit 40 such as the synchronization of the printing timing of the head unit 30 which is varied and adjusted based on the measured thickness information of the print medium m and the conveying speed adjustment of the medium, Can be implemented.

&Lt; Printing Method Having Media Thickness Calculation Function &

Hereinafter, a printing method having a medium thickness calculating function according to the present invention will be described in detail with reference to the drawings. In addition, for the sake of concise and clear description of the present invention, it should be noted that the detailed configuration, the thickness detection method, the detailed configuration of the control process, and the operation description of the printing apparatus described above are omitted in order to avoid redundancy.

FIG. 3 is a flow chart of a printing method having a medium thickness calculating function according to the present invention, and FIG. 4 is a block diagram showing steps included in an image recording step in a printing method having a medium thickness calculating function according to the present invention .

3 and 4, a printing method having a medium thickness calculating function according to the present invention includes a printing medium supplying step (S10) in which a printing medium is supplied from a supplying unit; An image recording step (S20) of recording an image on the print medium supplied from the supply unit in the head unit; And a print medium recovery step (S30) in which a print medium on which an image is recorded from the head unit is collected through a recovery unit; A printing medium thickness detecting step (S15) for detecting the thickness of the supplied printing medium by the thickness detecting unit between the printing medium supplying step (S10) and the image writing step (S20); Can be implemented.

That is, the printing method according to the present invention is implemented by a process of supplying the printing medium (S10), detecting the thickness of the supplied printing medium (S15), recording the image on the printing medium (S20), and recovering the printing medium (S30).

Here, the printing medium thickness detection step S15 captures the thickness of the printing medium in real time through the camera and transmits the thickness of the printing medium to the control unit. The control unit analyzes the image information transmitted from the camera through image processing to detect the thickness of the printing medium Lt; / RTI &gt;

Alternatively, the printing medium thickness detecting step (S15) may include detecting the thickness of the printing medium by comparing the pulse values detected by the first and second encoders provided adjacent to the medium feeding roller provided between the feeding section and the head section, Lt; / RTI &gt;

Here, the first encoder is installed to rotate in conjunction with the medium feed roller in contact with one side of the medium feed roller, and the second encoder is installed to rotate in conjunction with the medium feed roller through the print medium at the other side of the medium feed roller do.

Meanwhile, the real-time thickness information of the print medium detected through the print medium thickness detection step (S15) is transmitted to the control unit, and the control unit generates the corresponding print parameters according to the real time thickness change of the print medium and applies the generated print parameters to the printing process .

That is, the real-time thickness information of the print medium detected through the print medium thickness detection step (S15) is transmitted to the control unit, and the control unit controls the head unit operation in the image recording step (S20) Respectively.

Here, the image recording step S20 includes a position changing step S21 for changing the position of the head part, as shown in Fig. 4; A supply amount varying step (S22) for varying a supply amount of ink supplied to the head part; A variable injection amount step (S23) of varying the injection amount of ink injected from the head part; And an injection speed varying step (S24) for varying an injection speed of ink injected from the head part; . The variable position step S21 may be performed before the image recording step S20 in which the printing process is performed. The variable amount step S22, the variable injection amount step S23, and the variable injection speed step S24 may be performed. (S20) in which the printing process is performed. The position changing step S21 and the supply amount varying step S22, the injection amount varying step S23 and the injection speed varying step S24 may be selectively performed through the control of the control unit in the image recording step S20 , This selective control can be made according to the setting of the printing parameters on the printing process.

Thereafter, the printing medium on which the image recording step S20 is completed by the setting is recovered through the printing medium recovery step (S30), and the printing process is completed.

The present invention can also be implemented by a computer-readable recording medium storing a program for performing the above-described printing method. In particular, the present invention can be applied to an analysis and calculation processor, a control processor, An algorithm having a function of controlling the operation in the image recording step S20 according to the detected thickness, and a recording medium on which the program is stored.

As described above, the printing apparatus and the method provided with the medium thickness calculating function according to the present invention detect the thickness of the printing medium on the supplying side in real time and reflect the printing medium in the printing process, so that high- Can be produced.

While the present invention has been described with reference to the exemplary embodiments and the drawings, it is to be understood that the technical scope of the present invention is not limited to these embodiments and that various changes and modifications will be apparent to those skilled in the art. Various modifications and variations may be made without departing from the scope of the appended claims.

And can be widely used in various kinds of printing apparatuses.

Claims (19)

1. A supply unit for supplying the print medium;

   A recovery unit for recovering the print medium;

   A head unit installed between the supply unit and the recovery unit and recording an image on a print medium; And

   A control unit for controlling driving of the supply unit, the recovery unit, and the head unit; / RTI &gt;

   And a thickness detecting portion provided adjacent to the supplying portion and for detecting the thickness of the printing medium

   A printing apparatus having a medium thickness calculating function.
2. The method according to claim 1,

   Wherein the thickness detecting unit is provided by a camera and the control unit analyzes the image information transmitted from the camera through image processing to detect the thickness of the printing medium

   A printing apparatus having a medium thickness calculating function.
3. The method according to claim 1,

   Wherein the thickness detecting portion is installed in one of a plurality of media feeding rollers provided between the feeding portion and the head portion

   A printing apparatus having a medium thickness calculating function.
4. The method of claim 3,

   The thickness detecting unit may include a first encoder which is installed to rotate in conjunction with the medium feeding roller in contact with one side of the medium feeding roller, and a second encoder which is provided to rotate in conjunction with the medium feeding roller via the printing medium at the other side of the medium feeding roller Characterized in that

   A printing apparatus having a medium thickness calculating function.
5. 5. The method of claim 4,

   Wherein the controller detects the thickness of the printing medium by comparing the pulse value of the first encoder generated by the rotation of the medium feeding roller with the pulse value of the second encoder

   A printing apparatus having a medium thickness calculating function.
6. The method according to claim 1,

   Wherein the control unit is adapted to generate a corresponding printing parameter according to a change in thickness of the printing medium detected based on the real-time sensing information transmitted from the thickness detecting unit, and apply the generated printing parameter to the printing process

   A printing apparatus having a medium thickness calculating function.
7. The method according to claim 1,

   Wherein the controller is configured to vary the operation of the head according to the thickness of the print medium detected based on the real-time sensing information transmitted from the thickness detector,

   A printing apparatus having a medium thickness calculating function.
8. 8. The method of claim 7,

   Wherein the controller is configured to vary the position of the head unit according to the thickness of the print medium detected based on the real-time sensing information transmitted from the thickness detecting unit

   A printing apparatus having a medium thickness calculating function.
9. 8. The method of claim 7,

   Wherein the control unit is configured to vary the supply amount of ink supplied to the head unit according to the thickness of the print medium detected based on the real-time sensing information transmitted from the thickness detecting unit

   A printing apparatus having a medium thickness calculating function.
10. 8. The method of claim 7,

    Wherein the control unit is configured to vary the amount of ink ejected from the head unit according to the thickness of the print medium detected based on the real-time sensing information transmitted from the thickness detecting unit

    A printing apparatus having a medium thickness calculating function.
11. 8. The method of claim 7,

    Wherein the control unit is configured to vary the jetting speed of the ink ejected from the head unit according to the thickness of the print medium detected based on the real time sensing information transmitted from the thickness detecting unit

    A printing apparatus having a medium thickness calculating function.
12. A print medium supply step in which a print medium is supplied from a supply unit;

    An image recording step of recording an image on a print medium supplied from the supply unit in the head unit; And

    A print medium recovery step of recovering a print medium on which an image is recorded from the head unit through a recovery unit; / RTI &gt;

    A printing medium thickness detecting step for detecting a thickness of the supplied printing medium by the thickness detecting unit between the printing medium supplying step and the image writing step; Lt; RTI ID = 0.0 &gt;

    A printing method having a medium thickness calculating function.
13. 13. The method of claim 12,

    In the printing medium thickness detecting step, the thickness of the printing medium is photographed in real time and transmitted to the control unit. The control unit analyzes the image information transmitted from the camera through image processing to detect the thickness of the printing medium Featured

    A printing method having a medium thickness calculating function.
14. 13. The method of claim 12,

    Wherein the step of detecting the thickness of the print medium is a step of detecting the thickness of the print medium by comparing the pulse values detected by the first and second encoders provided adjacent to the medium transport roller provided between the supply unit and the head unit, doing

    A printing method having a medium thickness calculating function.
15. 15. The method of claim 14,

    The first encoder is installed to rotate in conjunction with the medium feed roller in contact with one side of the medium feed roller, and the second encoder is installed to rotate in conjunction with the medium feed roller through the print medium at the other side of the medium feed roller Featured

    A printing method having a medium thickness calculating function.
16. 13. The method of claim 12,

    The real time thickness information of the print medium detected through the print medium thickness detecting step is transmitted to the controller, and the controller generates the corresponding print parameters according to the real time thickness change of the print medium and applies the generated print parameters to the printing process To

    A printing method having a medium thickness calculating function.
17. 13. The method of claim 12,

    The real time thickness information of the printing medium detected through the printing medium thickness detecting step is transmitted to the control unit and the control unit is configured to control the head unit operation in the image recording step according to the real time thickness change of the printing medium Featured

    A printing method having a medium thickness calculating function.
18. 18. The method of claim 17,

    The image recording step includes:

    A position varying step of varying a position of the head part;

    A supply amount varying step of varying a supply amount of ink supplied to the head part;

    A variable injection amount step of varying an injection amount of ink injected from the head part; And

    An injection speed varying step of varying an injection speed of ink injected from the head portion; &Lt; RTI ID = 0.0 &gt;

    A printing method having a medium thickness calculating function.
19. A computer-readable recording medium storing a program for performing the printing method according to any one of claims 12 to 18.

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