JP2015155181A - printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid deterioration of water resistance of a medium due to clogging of a nozzle of clear ink.

SOLUTION: A printer 1 comprises: a discharge section individually discharging color material ink containing a color material and colorless material ink having water resistance and not containing the color material in a dropwise manner; a control section 200 forming a region of the color material ink on a sheet P by causing the color material ink to be discharged from the discharge section onto the sheet P and causing the colorless material ink to be discharged from the discharge section so as to cover the region of the color material ink formed; a nozzle clog detection section 220 detecting non-discharge of the colorless material ink due to clogging of the discharge section; and a warning section 210 notifying a user of information related to the non-discharge detected by the nozzle clog detection section 220.

COPYRIGHT: (C)2015,JPO&INPIT

Description

  The present invention relates to a printing apparatus.

In an inkjet printer that prints by ejecting ink droplets onto a medium, color material ink generated by dissolving a dye or a pigment in a solvent is used. In recent years, as shown in Patent Document 1 below, in addition to color material inks such as dyes or pigments, printing characteristics using an ink that does not include a colorant and has a specific function (hereinafter referred to as “clear ink”) Has been made to improve. As is well known, by using clear ink, it is possible to improve uneven gloss and improve the water resistance of the medium.
By the way, the coloring material ink may increase in viscosity due to volatilization of the ink solvent in the ink existing in the nozzle during the printing pause, and the nozzle may be clogged, resulting in printing defects such as missing dots. In order to avoid such a printing defect, a technique for detecting clogging of a nozzle based on a change in electric field caused by charging of an ink droplet ejected from a nozzle is known, as shown in Patent Document 2 below. It has been.

JP 2013-144402 A JP 2008-168524 A

However, if the clear ink nozzle is clogged and the missing dots occur, the clear ink does not contain a color material and is not visually noticeable. The deterioration of the water resistance of the ink caused a decrease in print quality.
The present invention has been made in view of the above-described problems, and an object thereof is to avoid deterioration of the water resistance of a medium due to clogging of a nozzle that discharges clear ink.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

[Application Example 1]
A printing apparatus according to this application example includes: a color material ink including a color material; and a water-resistant colorless material ink that does not include the color material, and a discharge unit that ejects the color material ink in droplets. A control unit that discharges the colorless material ink from the discharge unit so as to cover the formed color material ink region. A detection unit that detects non-ejection of the colorless material ink due to clogging, and a notification unit that notifies information about the non-ejection detected by the detection unit.

  According to such a configuration, the control unit selectively discharges the color material ink from the discharge unit to the medium, thereby forming the color material ink region on the medium, and further covering the formed region. Colorless material ink is discharged from the discharge portion. The detection unit detects the non-ejection of the colorless material ink due to the clogging of the ejection unit. When the non-ejection is detected, the notification unit notifies the non-ejection of the colorless material ink. Therefore, it is possible to avoid deterioration of water resistance due to non-ejection of the colorless material ink by making the user recognize that the colorless material ink is not ejected.

[Application Example 2]
In the printing apparatus according to the application example, it is preferable that the control unit determines whether or not to discharge the colorless material ink to the medium according to the attribute of the medium.

  According to such a configuration, it is possible to improve the water resistance of the medium by determining the medium that needs to be improved in water resistance by the attribute and discharging the colorless material ink.

[Application Example 3]
In the printing apparatus according to the application example, when the control unit determines to discharge the colorless material ink to the medium, and the remaining amount of the colorless material ink is less than a reference amount, It is preferable not to discharge the color material ink to the medium.

  According to such a configuration, when the water resistance of the medium cannot be improved because the remaining amount of the colorless material ink is less than the reference amount, the water resistance is improved by not discharging the color material ink to the medium. Printing on the medium in a deteriorated state can be avoided.

[Application Example 4]
In the printing apparatus according to the application example described above, it is preferable that the control unit can determine whether or not to discharge the colorless material ink to a region where the color material ink is not discharged on the medium.

  According to such a configuration, it can be determined whether or not the colorless material ink is ejected to the area where the color material ink is not ejected on the medium. Therefore, it is possible to suppress consumption of the colorless material ink and to change the water resistance range of the medium. Easy to do.

[Application Example 5]
The printing apparatus according to the application example includes a reversing unit that reverses the front and back of the medium, and the control unit ejects the color material ink onto one surface of the medium based on print data, and then the medium. It is preferable that the colorless material ink is ejected on the entire surface of one surface of the medium, and then the medium is reversed to the reversing portion so that the colorless material ink is ejected on the entire surface of the other surface of the medium.

  According to such a configuration, in addition to one side of the medium that discharges the color material ink, the colorless material ink is also discharged to the other side that does not discharge the color material ink, thereby further enhancing the water resistance of the medium. it can.

[Application Example 6]
The printing apparatus according to the application example includes a reversing unit that reverses the front and back of the medium, and the control unit reverses the medium by the reversing unit based on print data, thereby the both sides of the medium. The colorless material ink is ejected and the colorless material ink is ejected on the entire surface of the medium for each surface on which the color material ink is ejected, or the colorless material ink is ejected on both surfaces of the medium. Is preferably discharged over the entire surface of both sides of the medium.

  According to such a configuration, the colorless material ink is ejected to both sides of the medium from which the color material ink is ejected, so that the water resistance of the medium can be further enhanced.

1 is an external perspective view of an ink jet printer according to an embodiment of the present invention. FIG. 3 is a side cross-sectional view along the paper conveyance path of the inkjet printer. FIG. 2 is a block diagram illustrating a main circuit of the inkjet printer. FIG. 3 is a diagram illustrating a configuration of a print head unit. The block diagram which shows the function structure of an inkjet printer.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment)
FIG. 1 shows an external perspective view of an inkjet printer (hereinafter referred to as “printer”) 1 as an embodiment of a printing apparatus according to the present invention during printing. FIG. 2 is a side sectional view taken along the paper transport path of the printer 1 and shows a state in which the medium receiving tray 8 is overhanging.
The configuration of the entire mechanism unit of the printer 1 will be outlined with reference to FIGS. 1 and 2. The printer 1 includes a scanner unit 4 on the upper part of an apparatus main body 2 that includes a recording unit 3 that performs ink jet recording on a sheet of paper as an example of a medium, and is configured as a multifunction machine that has a scanner function in addition to the ink jet recording function. However, the present invention is not limited to this mode, and a printing apparatus having only a printing function may be used.
The printer 1 can use various papers including a sticker paper having one surface having adhesiveness.
The printer 1 includes an operation panel 5 on the front surface of the apparatus body 2. The operation panel 5 includes a user interface for setting various recording conditions, an information display unit 5a for displaying various information such as an image to be printed, print setting contents, a preview display of a print image, a power button, and print execution. And an operation setting unit 5b including operation buttons for setting various recording conditions.

Next, the recording unit 3 will be described with reference to FIG. The recording unit 3 includes a medium receiving tray 8, a pickup roller 10, an intermediate roller 17, a conveyance driving roller 24, a conveyance driven roller 25, a paper support member 28, a recording head 30, a discharge driving roller 31, a discharge driven roller 32, and a medium. The cassette 50 is configured.
The printer 1 includes a manual feed cover 6 that can be opened and closed by manual operation at the upper rear portion of the apparatus body 2. By opening the manual feed cover 6, paper can be manually fed using the manual feed tray 7.
The printer 1 also includes a lower cassette 51 and an upper cassette 52 as the medium cassette 50. Each cassette is detachable from the front side of the apparatus from the opening at the lower front of the apparatus body 2. The upper cassette 52 is configured such that a pinion (not shown) provided in the apparatus main body 2 meshes with a rack (not shown) provided in the upper cassette 52, and this pinion is a paper provided in the apparatus main body 2. It is rotationally driven by a feed motor 124 (FIG. 3).

The pickup roller 10 is provided at the swinging end of the swinging member 11 that swings around the swinging shaft 12, and the swinging member 11 is provided with the rotation of the paper feed motor 124 connected to the swinging shaft 12. It is configured to be driven and rotated by being transmitted through the gear train 13.
When the upper cassette 52 is slid to the front side of the apparatus most, the pickup roller 10 is in contact with the uppermost sheet P1 stored in the lower cassette 51 and is rotated. The uppermost sheet P1 is sent out from the lower cassette 51.
Further, when the upper cassette 52 is at the abutting position where the upper cassette 52 slides most toward the rear side of the apparatus, the pickup roller 10 comes into contact with the uppermost sheet P2 stored in the upper cassette 52 and is rotated. Thus, the uppermost sheet P2 is sent out from the upper cassette 52.
The apparatus main body 2 includes a separation slope 14 that inclines and rises rearward at a position facing the insertion-side tip of the medium cassette 50 inside. Then, the paper P1 sent from the lower cassette 51 or the paper P2 sent from the upper cassette 52 is advanced by the pickup roller 10 toward the downstream side while being in contact with the separation slope 14, so The upper sheet and the subsequent sheets are separated. Note that a structure in which three or more independent paper cassettes are inserted and removed may be employed.

Here, the paper transport unit 250 (FIG. 5) that transports the manually fed paper P and the paper P separated from the medium cassette 50 to the printing position will be described.
The printer 1 includes an intermediate roller 17 that is rotationally driven by a paper feed motor 124 on the upper side of the separation slope 14 (the upper rear side in the apparatus main body 2), and a driven roller 19 that nips the intermediate roller 17. , 20 and a guide 18 between the driven rollers 19, 20. With this configuration, the printer 1 causes the paper P guided upward by the separation slope 14 to be transported by the driven roller 19 and the intermediate roller 17, the guide operation in the circumferential direction of the intermediate roller 17 by the guide 18, and the driven. Due to the transfer action by the roller 20 and the intermediate roller 17, it is curved and inverted along the intermediate roller 17 and transferred toward the front side of the apparatus.
Further, at a destination where the paper P is transferred to the front side of the apparatus by the intermediate roller 17, a transport driving roller 24 that is rotationally driven by a paper feed motor 124, and a transport driven roller 25 that is driven to rotate in contact with the transport driving roller 24. Is provided. These rollers 24 and 25 are transferred to a recording area for recording on the paper P.

The recording area is an area that includes a recording head 30 that ejects ink, a paper support member 28 that is horizontally mounted at a lower position facing the recording head 30, and a carriage 29 that supports the recording head 30 at the bottom. The carriage 29 is driven by a main scanning motor 123 (FIG. 3) so as to reciprocate the recording head 30 in the main scanning direction (front and back direction in FIG. 2).
The paper support member 28 at the lower position of the recording head 30 defines the interval between the paper P and the recording head 30.
Discharge means for discharging the paper P on which recording has been performed by the recording head 30 is provided downstream of the paper support member 28 in the discharge direction of the paper P. The discharge means is provided with a discharge drive roller 31 that is rotationally driven by a paper feed motor 124 and a discharge driven roller 32 that is driven to rotate in contact with the discharge drive roller 31. The paper P recorded by the recording head 30 is discharged by the rollers 31 and 32 toward the medium receiving tray 8 described above.
Next, the paper reversing unit 240 (FIG. 5) that prints one side of the paper P and then reverses the paper P to print the other side of the paper P will be described.

As shown in FIG. 2, a paper guide member 21 is provided on the front side of the intermediate roller 17. The sheet guide member 21 has a conveyance surface that progresses downward from the predetermined height position in the vertical direction of the intermediate roller 17 toward the front side, and this conveyance surface constitutes the front conveyance path D1. .
On the other hand, a frame member 22 is provided below the sheet guide member 21. The frame member 22 is provided with a gap that allows the paper P to sufficiently pass through the paper guide member 21. And the edge part of the back side of this frame member 22 is extended to the vicinity of the lower end of the intermediate | middle roller 17, The wraparound member 23 is provided in the frame member 22 facing. The upper surface of the frame member 22 and the upper surface of the wrap-around member 23 constitute a reversing transport path D2 for feeding the paper P from the front side to the back side, and the paper P guided by the reversing transport path D2 is The intermediate roller 17 and the driven roller 19 are fed to the facing portion.

Here, after the paper P is transported to the lower position of the recording head 30 by the front transport path D1 and printing on the paper P is performed, when the paper P is returned to the back side, the paper P is transported for reversal. The route D2 is configured to travel. Then, after the paper P travels the reversing conveyance path D <b> 2, and passes through the intermediate roller 17, the paper P is reversed from the time when it first passed through the intermediate roller 17. The sheet P reversed as described above is transported again below the recording head 30 via the front transport path D1, whereby double-sided printing on the sheet P is executed. In the present embodiment, the operation of returning the paper P to the back side after printing on the paper P is referred to as switchback.
FIG. 3 shows a main circuit of the printer 1 in a block diagram. The printer 1 includes a print head unit 112 provided in the recording head 30, a head driving circuit 152 that drives the recording head 30 to control ink ejection and dot formation, and reciprocates the recording head 30 in the main scanning direction. And a control circuit 140 for controlling the exchange of signals between the recording head 30 and the operation panel 5, and the like.

The control circuit 140 is connected to the computer 190 via the connector 156. The control circuit 140 includes a CPU (Central Processing Unit) 141, a programmable ROM (P-ROM (Read Only Memory)) 143, a RAM (Random Access Memory) 144, an EEPROM (Electronically Erasable and Programmable ROM) 146, and the like. It is configured as a logic operation circuit.
The control circuit 140 further drives an I / F dedicated circuit 150 that is an interface (I / F (Interface)) with an external motor and the like, and the recording head 30 connected to the I / F dedicated circuit 150. A head drive circuit 152 that discharges ink and a motor drive circuit 154 that drives the main scanning motor 123 and the paper feed motor 124 are provided. The I / F dedicated circuit 150 has a built-in parallel interface circuit, and can receive the print signal PS supplied from the computer 190 via the connector 156.

  The driver software for the printer 1 installed in the computer 190 includes a color conversion unit and a halftoning unit, and the output of the halftoning unit is supplied to each nozzle. Here, the color conversion unit receives input of image data such as RGB (Red, Green, Blue) full-color image data, and forms, for example, RGB color system color data constituting the input image data. The color data of the CMYK color system (cyan ink (C), magenta ink (M), yellow ink (Y), black ink (K)) having color components corresponding to the color ink color set are converted. Further, the halftoning unit performs processing such as error diffusion or dithering on the image data output from the color conversion unit, and multi-gradation data (for example, 256 gradations) of each color of CMYK, For example, the data is converted into binarized bitmap data expressed by the density of dots of each color of CMYK.

Further, when generating the bitmap data, the halftoning unit also generates CL dot data indicating clear ink (CL) dots in addition to CMYK dot data indicating CMYK dots. That is, the bitmap data output from the halftoning unit includes bitmap data of C, M, Y, K, and CL. The C, M, Y, and K bitmap data and the CL bitmap data differ depending on the purpose of use of the CL, so that the halftoning unit generates an appropriate one according to the purpose of use of the CL.
Bitmap data output from the halftoning section is supplied to the print head unit 112 as print job data, and C, M, Y, K, CL ink droplets are ejected according to the bitmap data, and dots are formed on the printing paper. It is formed.
The color ink and the CL bitmap data generated in this way are output from the halftoning unit and supplied to the printer 1 via the I / F unit 196. In the printer 1, the CPU 141 receives these data. The CPU 141 drives the paper feed motor 124 to convey the paper P by a predetermined amount, and drives the main scanning motor 123 based on the received bitmap data to perform main scanning, and also via the head drive circuit 152. An ink ejection signal is sent to the print head unit 112 to print an image on the paper P.
In this embodiment, the printer 1 is connected to the computer 190 and receives print job data from the computer 190. However, the present invention is not limited to this. For example, the printer 1 includes a memory card reading unit that reads a memory card (not shown), reads image data stored in the memory card, generates image data, and prints based on the generated image data. Can be assumed.

FIG. 4 shows the configuration of the print head unit 112. The print head unit 112 is composed of five heads HN. The heads HN are assigned to C, M, Y, K, and CL, and each head HN has nozzles that eject ink droplets arranged at predetermined intervals.
The inks corresponding to C, M, Y, and K are color inks (coloring material inks) each containing a colored pigment, and the inks corresponding to CL are colorless CLs (colorless material inks) that do not contain a pigment. It is. In this embodiment, CL employs an overcoat ink (for example, a gloss optimizer) having a water resistance, a uniform printing surface, and a function of suppressing irregular reflection of light as a clear ink.
Although not shown, the print head unit 112 pays attention to the nozzle of the head HN to which CL is assigned, and based on the electric field change caused by the charged ink droplet discharged from the nozzle, the ink droplet This circuit has a circuit for detecting non-ejection, that is, nozzle clogging. In this embodiment, this circuit corresponds to the nozzle clogging detection unit 220 (FIG. 5). A technique for detecting nozzle clogging based on a change in electric field is disclosed in, for example, Japanese Patent Application Laid-Open No. 2008-168524.
The method for detecting nozzle clogging is not limited to detection based on a change in electric field, and a method for optically detecting ink droplets, a method for detecting ink droplets based on residual vibration after ejection, and the like are adopted. it can.

In the present embodiment, the print head unit 112 has a capacity of ink droplets ejected from the nozzles of the head HN to which CL is assigned, and the head HN to which the color material inks of C, M, Y, and K are assigned. Control is performed to increase the volume of ink droplets per dot ejected from the nozzle, and control is performed to increase the ejection density. Accordingly, the CL area adhering to the paper P becomes wider than the color material ink area, and the CL is solidified so that the colorless coat layer covers the drawing area drawn with the color material ink so as to laminate. Can do.
FIG. 5 is a block diagram illustrating a functional configuration of the printer 1. Each function of the printer 1 is configured to be controlled by the control unit 200.
The control unit 200 includes a print processing control unit 202, a color material ink discharge control unit 204, a colorless material ink discharge control unit 206, a water resistance processing control unit 208, a warning unit 210, and a paper transport control unit 212. Each of these functional units realizes a function by the cooperation of the control circuit 140 as hardware and software stored in the P-ROM 143 or the EEPROM 146.
The recording head 30 also includes a color material ink discharge unit 235 that discharges color material ink and a colorless material ink discharge unit 230 that discharges colorless material ink. In this embodiment, the head HN that discharges C, M, Y, and K corresponds to the color material ink discharge unit 235, and the head HN that discharges CL corresponds to the colorless material ink discharge unit 230.

The print processing control unit 202 selectively instructs the color material ink discharge control unit 204 to discharge each color ink from the color material ink discharge unit 235 based on the bitmap data (print data) sent from the computer 190. At the same time, the paper conveyance control unit 212 is instructed to convey the paper P, and further instructed to reciprocate the recording head 30.
Further, the print processing control unit 202 instructs the water resistance processing control unit 208 to perform water resistance processing for the paper P.
The color material ink discharge control unit 204 controls the discharge of each color material ink from the color material ink discharge unit 235 based on an instruction from the print processing control unit 202.
The water resistant processing control unit 208 instructs the colorless material ink discharge control unit 206 to discharge colorless material ink onto the paper P based on an instruction from the print processing control unit 202. Details of the function of the water-resistant treatment control unit 208 will be described later.

The colorless material ink discharge control unit 206 discharges CL ink droplets from the colorless material ink discharge unit 230 based on an instruction from the water resistant treatment control unit 208.
In addition, when the nozzle clogging detection unit 220 detects clogging of the nozzles of the head HN to which CL is assigned, the detected clogging information is sent to the water resistant processing control unit 208. When the clogging information is received, the water resistant processing control unit 208 causes the colorless material ink discharge control unit 206 to stop discharging the colorless material ink onto the paper P and instructs the warning unit 210 to issue a warning. The warning unit 210 functions as a notification unit, for example, displays an alert indicating the occurrence of clogging of colorless material ink in the display area of the operation panel 5 and notifies the user that the water resistance of the paper P cannot be improved. Further, a process for cleaning the nozzles may be executed.
The paper transport control unit 212 instructs the paper transport unit 250 to transport the paper P based on an instruction from the print processing control unit 202, and instructs the paper reversing unit 240 to reverse the front and back of the paper P. To do.

Here, the functions of the water-resistant treatment control unit 208 will be described in detail. The water-resistant treatment control unit 208 has a media support function, a discharge area setting function, and a double-side discharge function.
<Media support function>
The water resistant processing control unit 208 acquires information on the print medium (media) included in the bitmap data, and determines whether or not to discharge colorless material ink according to the attribute of the medium. For example, when the medium is sticker paper, colorless material ink is ejected onto the paper P to ensure water resistance. Further, when the medium is sticker paper and the remaining amount of the CL capacity that can be discharged from the colorless material ink discharge unit 230 is smaller than the reference amount, the warning unit 210 is prohibited to prohibit the use of the sticker paper. A mode of instructing a warning can also be assumed.
<Discharge area setting function>
The water-resistant treatment control unit 208 has a saving mode for reducing the consumption of CL with respect to the water-resistant treatment, and a water-resistant improvement mode for further improving the water resistance of the paper P, and the user can select any mode.
In the saving mode, when the recording head 30 reciprocates in the main scanning direction, for example, CL is not discharged to an area where the print job data is not drawn, such as around the both ends of the paper P. Thereby, consumption of CL can be suppressed.

In the water resistance improvement mode, CL is also ejected to areas that are not the color ink ejection areas, such as the leading and trailing edges of the paper P in the transport direction. Thereby, the water resistance of the paper P can be further improved.
<Double-sided discharge function>
The water-resistant treatment control unit 208 can further improve the water resistance of the paper P by discharging CL onto both the front and back sides of the paper P.
1. When the printing surface is single-sided After the water-proof treatment control unit 208 prints one printing surface, it instructs the paper transport control unit 212 to switch back the paper P, and when the paper P returns to the back side, CL is discharged over the entire surface.
Further, the paper conveyance control unit 212 is instructed to reverse the paper P, and when the reversed paper P is conveyed in the conveyance direction, CL is discharged over the entire other printing surface, and the paper P is discharged. As a result, CL is discharged on both the front and back sides of the paper P, and the water resistance of the paper P is further improved.

2. When the print side is double-sided and CL discharge is specified in the print job 2.1. When the print processing control unit 202 receives a print job, the print processing control unit 202 instructs printing of one of the print surfaces.
2.2. Next, the water-resistant treatment control unit 208 instructs the paper transport control unit 212 to switch back the paper P, and when the paper P returns to the back side, the CL is discharged over the entire surface of one of the printing surfaces. Laminate.
2.3. Next, the water resistant processing control unit 208 instructs the paper transport control unit 212 to invert the paper P, and the print processing control unit 202 detects the other printing surface when the inverted paper P is transported in the transport direction. Instruct to print.
2.4. Next, the water-resistant treatment control unit 208 instructs the paper transport control unit 212 to switch back the paper P again, and when the paper P returns to the back side, the CL is discharged over the entire other printing surface and the other printing is performed. Laminate the surfaces.
2.5. Finally, the paper P is discharged.
As a result, CL is ejected for each surface on which both the front and back sides of the paper P are printed, and in addition to further improving the water resistance of the paper P, the user can instruct the ejection of CL on both sides before printing.

3. When the printing surface is double-sided and CL discharge is instructed during printing 3.1. When the print processing control unit 202 receives a print job, the print processing control unit 202 instructs printing of one of the print surfaces.
3.2. Next, the water resistant processing control unit 208 instructs the paper transport control unit 212 to switch back the paper P and invert the paper P.
3.3. Next, the print processing control unit 202 instructs printing on the other printing surface when the reversed paper P is conveyed in the conveyance direction.
3.4. Next, when a CL discharge instruction (lamination instruction) is received from both sides of the user, and the discharge instruction is received, the water-resistant treatment control unit 208 instructs the paper transport control unit 212 to switch back the paper P, and the paper P When returning to the back side, CL is discharged and laminated on the entire surface of the other printing surface.
3.5. Next, the water-resistant treatment control unit 208 instructs the paper conveyance control unit 212 to invert the paper P, and when the inverted paper P is conveyed in the conveyance direction, the CL is discharged over the entire one printing surface. Laminate.
3.6. Finally, the paper P is discharged.
As a result, CL is discharged on both the front and back sides of the paper P, and the water resistance of the paper P is further improved. In addition, the user can instruct lamination on both sides during printing.
The above-described media support function, discharge area setting function, and double-sided discharge function may be executed in combination, and a mode in which the user selects a function to be executed via the operation panel 5 can also be assumed.

According to the embodiment described above, the following effects can be obtained.
(1) After printing an image based on image data using color ink containing pigment on paper P, CL is ejected so as to cover at least the print area of the print surface, and the colorless coat layer solidified by CL forms the print area. For protection, water resistance is improved.
(2) When the clogging of the nozzle that discharges CL is detected and the clogging of the nozzle is detected, the user is notified, so that deterioration of the water resistance of the paper P due to the defective discharge of CL can be avoided. In addition, when nozzle clogging is detected, generation of printed matter with deteriorated water resistance can be avoided by avoiding printing on the paper P.
(3) Since it is determined whether or not CL is ejected to the printing surface based on the attribute of the paper P, the CL can be used efficiently.
(4) By reversing the front and back of the paper P by the paper reversing unit 240, CL is discharged on both sides of the paper P, and the colorless coat layer solidified by the CL protects both sides of the paper P. Can be improved.

Although the embodiment of the present invention has been described with reference to the drawings, the specific configuration is not limited to this embodiment, and includes design changes and the like within a scope not departing from the gist of the present invention. For example, the form of the paper P is not limited to cut paper, and roll paper can also be assumed.
Moreover, the apparatus which implements the above methods may be realized by a single apparatus or may be realized by combining a plurality of apparatuses, and includes various aspects.
Each configuration in each embodiment and a combination thereof are examples, and addition, omission, replacement, and other changes of the configuration can be made without departing from the spirit of the present invention. Further, the present invention is not limited by the embodiments, but is limited only by the scope of the claims.

  DESCRIPTION OF SYMBOLS 1 ... Printer, 2 ... Apparatus main body, 3 ... Recording part, 4 ... Scanner unit, 5 ... Operation panel, 5a ... Information display part, 5b ... Operation setting part, 6 ... Manual feed cover, 7 ... Manual feed tray, 8 ... Medium receptacle Tray, 10 ... pick-up roller, 11 ... swing member, 12 ... swing shaft, 13 ... gear train, 14 ... separation slope, 17 ... intermediate roller, 18 ... guide, 19, 20 ... driven roller, 21 ... paper guide member , 22 ... frame member, 23 ... wraparound member, 24 ... transport driving roller, 25 ... transport driven roller, 28 ... paper support member, 29 ... carriage, 30 ... recording head, 31 ... discharge drive roller, 32 ... discharge driven roller, 50 ... Media cassette, 51 ... Lower cassette, 52 ... Upper cassette, 112 ... Print head unit, 123 ... Main scanning motor, 124 ... Paper feed mode 140, control circuit, 141, CPU, 143, P-ROM, 144, RAM, 146, EEPROM, 150, dedicated I / F circuit, 152, head drive circuit, 154, motor drive circuit, 156, connector, 190 DESCRIPTION OF SYMBOLS Computer, 196 ... I / F part, 200 ... Control part, 202 ... Printing process control part, 204 ... Color material ink discharge control part, 206 ... Colorless material ink discharge control part, 208 ... Water-resistant process control part, 210 ... Warning 212, a paper conveyance control unit, 220, a nozzle clogging detection unit, 230, a colorless material ink ejection unit, 235, a color material ink ejection unit, 240, a paper reversing unit, 250, a paper conveyance unit.

Claims (6)

A discharge unit that discharges the color material ink including the color material and the colorless material ink that has water resistance and does not include the color material, respectively;
The color material ink is ejected from the ejection unit onto a medium to form the color material ink region on the medium, and the colorless material ink is ejected from the ejection unit so as to cover the formed color material ink region. A control unit;
A detection unit for detecting non-discharge of the colorless material ink due to clogging of the discharge unit;
A notifying unit for notifying information on the non-ejection detected by the detecting unit. The printing apparatus according to claim 1,
The control unit determines whether or not to discharge the colorless material ink to the medium according to an attribute of the medium. The printing apparatus according to claim 2,
When the controller determines that the colorless material ink is to be ejected onto the medium and the remaining amount of the colorless material ink is less than a reference amount, the color material ink is ejected onto the medium. A printing apparatus characterized by not performing the above. The printing apparatus according to any one of claims 2 to 3,
The printing apparatus according to claim 1, wherein the control unit can determine whether or not to discharge the colorless material ink to an area where the color material ink is not discharged on the medium. The printing apparatus according to claim 1,
Comprising a reversing part for reversing the front and back of the medium,
The controller causes the color material ink to be ejected on one surface of the medium based on print data, and then causes the colorless material ink to be ejected on the entire surface of the medium. A printing apparatus, wherein the medium is reversed and the colorless ink is ejected over the entire other surface of the medium. The printing apparatus according to claim 1,
Comprising a reversing part for reversing the front and back of the medium,
The control unit causes the color material ink to be ejected on both surfaces of the medium by inverting the medium in the reversing unit based on print data, and the colorless material ink is ejected for each surface on which the color material ink is ejected. Or the color material ink is ejected on both sides of the medium, and then the colorless material ink is ejected on the entire surface of the medium.

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