WO2015146493A1 - インクジェットマーキング装置および方法 - Google Patents
インクジェットマーキング装置および方法 Download PDFInfo
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- WO2015146493A1 WO2015146493A1 PCT/JP2015/056030 JP2015056030W WO2015146493A1 WO 2015146493 A1 WO2015146493 A1 WO 2015146493A1 JP 2015056030 W JP2015056030 W JP 2015056030W WO 2015146493 A1 WO2015146493 A1 WO 2015146493A1
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- 238000000034 method Methods 0.000 title claims description 18
- 238000007639 printing Methods 0.000 claims abstract description 132
- 239000000463 material Substances 0.000 claims description 81
- 239000000758 substrate Substances 0.000 claims description 38
- 238000001514 detection method Methods 0.000 claims description 33
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 230000032258 transport Effects 0.000 description 44
- 238000007689 inspection Methods 0.000 description 28
- 230000002950 deficient Effects 0.000 description 8
- 238000003384 imaging method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000005286 illumination Methods 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
- B41J13/0009—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0045—Guides for printing material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/36—Blanking or long feeds; Feeding to a particular line, e.g. by rotation of platen or feed roller
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/36—Blanking or long feeds; Feeding to a particular line, e.g. by rotation of platen or feed roller
- B41J11/42—Controlling printing material conveyance for accurate alignment of the printing material with the printhead; Print registering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16502—Printhead constructions to prevent nozzle clogging or facilitate nozzle cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
Definitions
- the present invention relates to an inkjet marking apparatus and method, and more particularly, to an inkjet marking apparatus and method suitable for forming a marking pattern on a printed material such as a pharmaceutical or food.
- Patent Document 1 a configuration disclosed in Patent Document 1 is known as an apparatus for forming a marking pattern on an object to be printed such as a tablet by an inkjet method.
- This printing apparatus creates a print pattern of a work based on work information such as the position and orientation of the work detected by imaging a work supplied at random by a supply conveyor, and the work is performed by an ink jet printer based on the print pattern. To print.
- an inkjet printer As an inkjet printer, a configuration having a line-type print head in which a large number of nozzles are arranged in a direction orthogonal to a conveyance direction of a printing material is known, and a nozzle to be used is set according to a printing position on the printing material. It is possible to select and print as appropriate.
- the line-type inkjet printer is suitable for high-speed printing because it is not necessary to move the print head during printing. On the other hand, if the nozzles used are biased, the nozzles that are hardly used may be clogged.
- the conventional printing apparatus described above is difficult to use the entire nozzle uniformly because the work transfer position and the transfer interval of the work with respect to the ink jet printer are not random, and it is easy to cause defective discharge of the nozzle that is not frequently used. There was a problem.
- an object of the present invention is to provide an inkjet marking apparatus and method capable of preventing a clogging of an inkjet nozzle and printing a large number of printed materials reliably at high speed.
- the object of the present invention is to provide a conveying means in which a plurality of holding portions for holding the printed material are formed at intervals in the conveying direction, a supply means for supplying the printed material to the holding portion, and a printing means by the conveying means to the printing region
- a printing unit that forms a marking pattern by an inkjet method on the conveyed printing material
- a control unit that controls operations of the conveying unit, the supply unit, and the printing unit, and the printing unit includes a conveyance direction of the printing material;
- a print head provided with a plurality of nozzles along a crossing direction; the print head is supported so as to be movable along the nozzle arrangement direction; and the control means changes the nozzle to be used.
- the operation of the supply unit is temporarily stopped to form a non-holding area in the transport unit where the printed material is not held by the holding unit.
- the non-holding area moves the print head while passing through the printing area is achieved by an ink jet marking device.
- the holding unit includes the holding unit formed in a row so that a plurality of printed materials conveyed to the printing area are arranged along the nozzle arrangement direction, and the holding unit It is preferable that each row
- the conveying means is preferably formed in a drum shape having the holding portion on the outer peripheral surface.
- the supply means includes a supply drum having a plurality of holding portions formed on the outer peripheral surface corresponding to the interval between the holding portions provided in the transport means, and the control means temporarily rotates the supply drum. It is preferable that the non-holding area is formed in the transport means.
- the holding unit further includes detection means for detecting the non-holding area before passing through the printing area, and the control means controls the print head based on detection of the non-holding area by the detection means. It is preferable to move.
- the object of the present invention is to supply the substrate to the holding unit of the conveying unit in which a plurality of holding units holding the substrate to be printed are formed at intervals in the conveying direction, and to hold the substrate to the holding unit.
- the printing unit includes a print head provided with a plurality of nozzles along a direction intersecting a conveyance direction of the substrate, and the print head is supported so as to be movable along an arrangement direction of the nozzles.
- the supplying step temporarily stops the supply of the printing material to the holding unit when the nozzle is changed to change the nozzle used in the printing step. Then, a non-holding area in which the substrate is not held by the holding unit is formed in the transport unit, and the printing step is performed while the non-holding area passes through the printing area after printing on the substrate. This is accomplished by an inkjet marking method that moves the head.
- an ink jet marking apparatus and method capable of preventing a clogging of an ink jet nozzle and printing a large number of printed materials reliably at high speed.
- FIG. 1 is a schematic configuration diagram of an inkjet marking device according to an embodiment of the present invention.
- an inkjet marking device 1 includes a supply device 10 that supplies a substrate, a first conveyance device 20 that receives and conveys the substrate supplied from the supply device 10, and a first conveyance device.
- 20 includes a second transport device 30 that receives and transports the printing material from 20, and a discharge device 40 that receives the printing material from the second transport device 30 and discharges it to the outside.
- the supply apparatus 10 includes a hopper 11 into which a printed material having a fixed form such as a tablet, a capsule, an empty capsule, and the like, a feeder 12 that aligns the printed material in the hopper 11, and the printed material guided by the feeder 12.
- a supply drum 13 to be conveyed is provided, and the substrate is supplied from the supply drum 13 to the first conveyance device 20 via the intermediate drum 14.
- the supply drum 13 and the intermediate drum 14 are provided with a large number of holding portions 13a and 14a composed of concave portions aligned in the axial direction and the circumferential direction of the cylindrical outer peripheral surface, and are accommodated in the holding portions 13a and 14a, respectively.
- the printed material can be conveyed while being sucked and held.
- the first conveying device 20 is formed in a drum shape like the supply drum 13 and the intermediate drum 14, and as shown in FIG. Many are provided at equal intervals along both the circumferential direction of the outer peripheral surface and the rotation axis direction.
- the holding unit 22 has a suction hole 24 formed in the bottom, and the inside of the first transport device 20 is decompressed by a vacuum suction device (not shown), so that the printed material P accommodated in the holding unit 22 is removed.
- the substrate P can be conveyed along the rotation direction of the first conveyance device 20 while being sucked and held through the suction holes 24 and preventing the direction of the substrate P from changing during conveyance.
- the second transport device 30 is configured in the same manner as the first transport device 20, and a holding portion 32 is formed on a drum-shaped outer peripheral surface.
- the printed material transported by the first transport device 20 is transported to the discharge device 40 with its front and back reversed when delivered to the second transport device 30.
- a first detection device 210, a first printing device 220, and a first print inspection device 230 are provided in the vicinity of the first conveyance device 20, and the first conveyance device. 20 are sequentially provided along the conveyance direction.
- the first detection device 210 includes an irradiation unit 212 that irradiates the printed material conveyed to the detection area with illumination light, and a CCD area camera or a CCD line camera that images the printed material from a direction different from the irradiation direction of the irradiation unit 212. And an imaging unit 214.
- the irradiation unit 212 is, for example, ring illumination, and can uniformly irradiate the printing material from the entire circumference.
- the first detection device 210 detects whether or not the printing material P is held by the holding unit 22 of the first transport device 20, and when the printing material P is held, the first detection device 210 detects the printing material P. In order to determine the position and direction, the dividing line, the concave portion, the outline (contour line), etc. of the substrate P are detected.
- the first printing apparatus 220 includes a print head 222 that is movably supported by a guide rail 221 that extends along the rotation axis direction of the first transport apparatus 20.
- the print head 222 includes a large number (for example, about several hundreds) of nozzles 224 on the surface facing the first transport device 20, and the printing material P transported to the printing area A by the first transport device 20.
- a printing pattern is formed on the surface of the printing material P by printing using an inkjet method.
- the arrangement direction of the nozzles 224 substantially coincides with the moving direction of the print head 222 and is orthogonal to the conveyance direction of the printing material P in this embodiment, but may be a direction that intersects the conveyance direction of the printing material P. It is not necessarily limited to the orthogonal direction.
- FIG. 3 is a development view showing a part of the outer peripheral surface of the first transfer device 20 in a plan view.
- Each holding portion 22 of the first transport device 20 is formed so as to be able to accommodate the printing material P, and is provided in a row shape in a direction orthogonal to the transport direction, and each row is arranged at intervals in the transport direction.
- the print head 222 of the first printing apparatus is arranged so as to cover the entire row of the holding units 22 conveyed to the printing area A, and can reciprocate along the guide rail 221 as indicated by an arrow. ing.
- the first print inspection apparatus 230 includes an irradiation unit 232 that irradiates the printed material conveyed to the inspection area with illumination light, and an imaging unit 234 such as a CCD area camera or a CCD line camera that images the printed material. Based on the position and direction of the printing material P detected by the first detection device 210, the marking pattern formed on the printing material is inspected.
- a second detection device 310, a second printing device 320, and a second print inspection device 330 are sequentially provided in the vicinity of the second transport device 30 along the transport direction of the second transport device 30. It has been.
- the configurations of the second detection device 310, the second printing device 320, and the second print inspection device 330 are the same as those of the first detection device 210, the first printing device 220, and the first print inspection device 230, respectively.
- the second detection device 310 includes an irradiation unit 312 and an imaging unit 314, and the second print inspection device 330 includes an irradiation unit 332 and an imaging unit 334.
- the second conveyance device 30 receives and conveys the printing material from the first conveyance device 20, and the second conveyance device 30 is arranged on the surface opposite to the surface on which the marking pattern is formed during conveyance by the first conveyance device 20.
- the detection device 310, the second printing device 320, and the second printing inspection device 330 sequentially detect the substrate P, form a marking pattern, and perform a marking inspection.
- the discharge device 40 includes a distribution unit 42 that distributes the printed material based on the results of the marking inspection in the first print inspection device 230 and the second print inspection device 330, and guides only good products to the discharge conveyor 44. Then discharge.
- FIG. 4 is a block diagram showing the overall configuration of the inkjet marking apparatus 1 described above.
- the detection results of the first detection device 210, the first print inspection device 230, the second detection device 310, and the second print inspection device 330 are input to the control device 50.
- the control device 50 controls the operations of the supply device 10, the first transport device 20, the second transport device 30, the discharge device 40, the first printing device 220, and the second printing device 320.
- step S1 When the substrate P to be printed, which is a tablet, is supplied from the supply device 10 to the first conveyance device 20 (step S1), the substrate P is transferred from the first conveyance device 20 as shown in FIG. It is individually accommodated in the holding unit 22 so as to be aligned in a direction orthogonal to the transport direction.
- the dividing line C is formed on the printing material P, the direction of the dividing line C formed on each printing material P is random.
- the imaging unit 214 detects whether the printing material P is held by the holding unit 22 (step S3).
- the control device 50 acquires image data of the substrate P, and acquires position data and direction data (X, Y, ⁇ ) of each substrate P by detecting the dividing line C. (Step S4).
- the to-be-printed material P in which the dividing line C does not exist in the acquired image data that is output instead of direction data.
- Step S5 when the substrate P is conveyed to the printing area A of the first printing apparatus 220, the marking pattern M is formed in accordance with the position and direction of each substrate P as shown in FIG. (Step S5).
- coordinate data in a reference coordinate system of a marking pattern made up of letters, numbers, symbols, figures, and the like and combinations thereof is stored in advance in the memory unit and input from the first detection device 210.
- the nozzle 224 of the print head 222 to be used is selected, and ink jet printing is performed.
- the nozzle 224 to be used and the ejection time of each nozzle 224 vary depending on the position and direction of the substrate P to be printed. For example, as shown in FIG. 7A, when the linear marking pattern M is formed by the nozzle 224-1 when the position and direction of the substrate P coincide with the reference position and reference direction, When the position data (data in the X direction orthogonal to the transport direction) of the printing material P acquired by the first detection device 210 is shifted from the reference position, as shown in FIG. Marking is performed using the selected nozzle 224-2. In addition, when the direction data of the printing material P acquired by the first detection device 210 (data in the ⁇ direction with the reference position as the origin) is deviated from the reference direction, as shown in FIG. Marking is performed by expanding the nozzle 224-3 to be used in accordance with the amount of deviation.
- the imaging unit 234 acquires image data of the printing material P for each column. .
- the control device 50 compares this image data with preset reference pattern data, and inspects the marking accuracy by a known inspection method such as pattern matching (step S6).
- the printing material P is continuously supplied from the supply device 10 to the first transport device 20, and the printed portions P are transported to the first printing device 220 to sequentially form the marking pattern. If the marking on the printing material P is repeatedly performed, the nozzles 224 to be used are biased, and there is a possibility that the nozzles 224 that are less frequently used are clogged. For this reason, the control device 50 determines whether or not it is necessary to change the nozzle (step S7), and in the case of changing the nozzle, the supply device 10 temporarily stops the rotation of the supply drum 13 ( Step S8).
- a non-holding area where the printing material P is not held is formed in the holding portion 14 a of the intermediate drum 14, and a non-holding area where the printing material P is not held in the holding portion 22 is also formed in the first transport device 20.
- the supply of the printing material P from the supply drum 13 to the first transport device 20 may be performed directly without using the intermediate drum 14.
- the method for determining the nozzle replacement time by the control device 50 is not particularly limited. For example, it is performed based on whether or not the number of prints in the first printing device 220 has reached a statistically preset number of times. Alternatively, the use frequency of each nozzle 224 can be detected at all times, and the determination can be made based on whether or not a predetermined deviation has occurred in the use frequency.
- the non-holding area N formed in the first transport device 20 is detected by the first detection device 210.
- the control device 50 determines that the non-holding area N passes through the first printing device 220.
- the print head 222 is moved without marking (step S9).
- the next and subsequent markings in the first printing apparatus 220 can be performed by changing the nozzle 224 to be used.
- the non-holding region N formed in the first transport device 20 is only one row of the holding unit 22 in this embodiment. However, in consideration of the time required for the movement of the print head 222, a plurality of rows of the holding unit 22 are provided.
- the non-holding area N may be used.
- the moving direction and moving amount of the print head 222 at the time of nozzle replacement be set so that the nozzle 224 that is used less frequently is used most with respect to the substrate P in the reference position and reference direction.
- FIG. 9A when a linear marking pattern M is formed by the nozzle 224-1 when the position and direction of the printing material P coincide with the reference position and reference direction, By moving the print head 222 in the right direction as shown in FIG. 9B, the nozzle used for the substrate P in the reference position and the reference direction is another nozzle on the left side of the original nozzle 224-1. It is changed to 224-4.
- the print head 222 is moved to the left as shown in FIG.
- the nozzle used for the substrate P in the reference position and the reference direction is located on the right side of the original nozzle 224-1. Nozzle 224-5.
- the nozzles 224 used in the reference position and reference direction can be adjusted by the amount of movement of the print head 222, and the nozzles can be changed by moving the print head 222 for the nozzles 224 that are least frequently used. Can be done effectively.
- the printing material P is transferred from the first conveyance device 20 to the second conveyance device 30, and the second detection device 310 and the second printing device.
- marking and marking inspection on the other surface of the substrate P are performed in the same manner as described above.
- the second printing apparatus 320 performs marking on the printed material based on the position data and the direction data acquired by the second detection apparatus 310
- the second printing inspection apparatus 330 performs the second printing.
- the marking accuracy is inspected based on the detection data of the detection device 310.
- the printing process for the other surface of the substrate P can also be performed according to the same procedure as described above according to the flowchart shown in FIG. 5, and the nozzle replacement is performed using the non-holding area formed in the second transport device 30. It can be performed appropriately.
- the discharging device 40 receives marking quality determination data for each printing material P from the first printing inspection device 230 and the second printing inspection device 330, and the printing material P determined to be non-defective is sent to the sorting unit 42. Then, while being guided to the discharge conveyor 44, the printed material P determined to be defective is blown out with air in the defective discharge unit 45 and guided to the defective discharge chute 46.
- the defective discharge confirmation sensor 47 checks whether or not the printed material P determined to be defective remains on the second conveying device 30, and if the defective printed material P remains, the sorting unit 42 prints the printed material. P is guided to the waste chute 48.
- the operation of the supply drum 13 included in the supply device 10 is performed at the time of nozzle replacement for changing the nozzles used in the first print inspection device 230 and the second print inspection device 330.
- the printing medium P is temporarily stopped to form a non-holding area N where the printing material P is not held by the holding units 22 and 32 of the first conveyance device 20 and the second conveyance device 30, and a marking pattern M is formed on the printing material P
- the printing medium P of the printing medium P by the first conveying apparatus 20 and the second conveying apparatus 30 is configured.
- both the first transport device 20 and the second transport device 30 are transport drums, but other configurations are possible as long as the posture of the printed material that is held does not change during transport. It may be.
- the first transport device 20 and the second transport device 30 are both used as a conveyor device such as a slat conveyor or a belt conveyor.
- the substrate to be horizontally transported by the apparatus 20 is turned upside down by the reversing mechanism 60 and mounted on the second transport device 30 to be transported horizontally to mark both the front and back surfaces of the substrate to be printed in the same manner as this embodiment. It can be performed.
- the second conveying device 30 is constituted by a suction belt having a suction hole capable of vacuum sucking the printed material from above, and is horizontally conveyed by the first conveying device 20. It is also possible to perform marking on both the front and back sides of the printed material by causing the printed material to be sucked and held by the second conveying device 30 and performing marking from below.
- 10A to 10C the same components as those in FIG. 1 are denoted by the same reference numerals.
- the supply device 10 may also have a conveyor-like configuration instead of including the supply drum 13.
- the formation of the marking may be performed only on one surface of the substrate, and includes the second transport device 30, the second detection device 310, the second printing device 320, and the second printing inspection device 330. There may be no configuration.
Landscapes
- Ink Jet (AREA)
- Coating Apparatus (AREA)
- Handling Of Sheets (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
10 供給装置
13 供給ドラム
20 第1の搬送装置
210 第1の検出装置
220 第1の印刷装置
222 印刷ヘッド
224 ノズル
230 第1の印刷検査装置
30 第2の搬送装置
310 第2の検出装置
320 第2の印刷装置
322 印刷ヘッド
324 ノズル
330 第2の印刷検査装置
Claims (6)
- 被印刷物を保持する保持部が搬送方向に間隔をあけて複数形成された搬送手段と、
前記保持部に被印刷物を供給する供給手段と、
前記搬送手段により印刷領域に搬送された被印刷物にインクジェット方式によるマーキングパターンを形成する印刷手段と、
前記搬送手段、供給手段および印刷手段の作動を制御する制御手段とを備え、
前記印刷手段は、前記被印刷物の搬送方向と交差する方向に沿ってノズルが複数設けられた印刷ヘッドを備え、前記印刷ヘッドは、前記ノズルの配列方向に沿って移動可能に支持されており、
前記制御手段は、使用する前記ノズルを変更するノズル替え時において、前記供給手段の作動を一時的に停止して被印刷物が前記保持部に保持されない非保持領域を前記搬送手段に形成し、被印刷物への印刷後、前記非保持領域が前記印刷領域を通過する間に前記印刷ヘッドを移動させる、インクジェットマーキング装置。 - 前記搬送手段は、前記印刷領域に搬送された被印刷物が前記ノズルの配列方向に沿って複数配置されるように、前記保持部が列状に形成されており、前記保持部の各列が搬送方向に間隔をあけて配置されている請求項1に記載のインクジェットマーキング装置。
- 前記搬送手段は、前記保持部を外周面に有するドラム状に形成されている請求項1に記載のインクジェットマーキング装置。
- 前記供給手段は、前記搬送手段が備える前記保持部の間隔に対応して複数形成された保持部を外周面に有する供給ドラムを備え、
前記制御手段は、前記供給ドラムの回転を一時的に停止して、前記搬送手段に前記非保持領域を形成する請求項1に記載のインクジェットマーキング装置。 - 前記保持部が前記印刷領域を通過する前に前記非保持領域を検出する検出手段を更に備え、
前記制御手段は、前記検出手段による前記非保持領域の検出に基づいて前記印刷ヘッドを移動させる請求項1に記載のインクジェットマーキング装置。 - 被印刷物を保持する保持部が搬送方向に間隔をあけて複数形成された搬送手段の前記保持部に、被印刷物を供給する供給ステップと、
前記保持部に保持された被印刷物を、前記搬送手段の作動により印刷手段の印刷領域に搬送する搬送ステップと、
前記印刷領域に搬送された被印刷物に、インクジェット方式によるマーキングパターンを形成する印刷ステップとを備え、
前記印刷手段は、前記被印刷物の搬送方向と交差する方向に沿ってノズルが複数設けられた印刷ヘッドを備え、前記印刷ヘッドは、前記ノズルの配列方向に沿って移動可能に支持されており、
前記供給ステップは、前記印刷ステップにおいて使用する前記ノズルを変更するノズル替え時において、前記保持部への被印刷物の供給を一時的に停止して、被印刷物が前記保持部に保持されない非保持領域を前記搬送手段に形成し、
前記印刷ステップは、被印刷物への印刷後、前記非保持領域が前記印刷領域を通過する間に前記印刷ヘッドを移動させる、インクジェットマーキング方法。
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