JP4411023B2 - Printing inspection system for packaging - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  This invention, for example, inspects whether or not printing is properly performed for characters and symbols printed on a packaging material that wraps a package such as a product or a label attached to a product.For packagingThe present invention relates to a print inspection system.
[0002]
[Prior art]
At present, regarding the packaging of products such as products, information on the contents is displayed for each package. When the package is a food or drink, the information regarding the package includes the manufacturer, the date of manufacture, the expiration date, the material used, etc., and the labeling is often required depending on the package. This information is usually expressed by printing letters, numbers, symbols, barcodes, etc. on a packaging material such as a packaging film or a label attached to a package such as a box or bag. The A printing device for printing on the printing surface of the packaging material or label is arranged attached to the packaging machine, and printing is performed directly on the packaging material or label fed out from the supply device. There are various types of printing apparatuses, such as a hot roll printer apparatus that prints characters on a printing surface by welding ink to a heated stamp, and a thermal printer apparatus that presses a thermal head against a thermal transfer ribbon or film to perform printing.
[0003]
In the printing apparatus, there is a possibility that problems such as missing or wrinkled prints may occur due to wear of the print head or engraving. In particular, in thermal transfer printing using a thermal head, printing may be incomplete due to defective ink transfer, making the printing unreadable or erroneous. In order to cope with the occurrence of such printing defects, currently, a certain range of areas including printed characters and the like are captured by an imaging device such as a camera, and the obtained image is captured in an image processing device and registered in advance. Whether printing is normal or defective is determined from the type, position, size, range, etc. of the printed characters.
[0004]
FIG. 3 shows an outline of a print inspection system 20 as an example of a conventional print inspection. As shown in FIG. 3, the printing device 22 is arranged in the middle of feeding the web-shaped packaging film F as a packaging material in a flat state to the packaging device, and the printing device 22 is used as a packaging unit on the packaging film F. Printing A is performed over a certain range at a corresponding predetermined interval. The illumination device 23 arranged on the downstream side of the printing device 22 irradiates the passing packaging film F, and when the printing region is included in the irradiation range, the imaging device 24 such as a camera displays a certain region including the printing A. Take a picture. The imaging information captured by the imaging device 24 is sent to the print inspection device 25, and used for the inspection whether or not the printing state of the print A is appropriate. The print inspection device 25 includes a display device 27 that displays image information taken by the image pickup device 24 and inspection results performed by the print inspection device 25, various settings of the image pickup device 24, the print inspection device 25, and the display device 27, and the like. Is connected to the operation board 26.
[0005]
In the print inspection system 20, first, since the imaging device 24 such as a camera captures an area including the print A as an imaging region, the imaging device 24a is at a certain distance from the packaging material F as shown in FIG. It is necessary to shoot with L. When a camera that captures a two-dimensional image is used as the image pickup device 24a, it is necessary to attach a camera at a certain distance from the packaging film F and photograph a relatively wide range at a time. Since no obstacles are allowed between the camera and the camera, there are significant restrictions on the camera mounting position, and it was not possible to place the camera at any location. Even when the imaging region is scanned by a line sensor instead of being captured at a time, the line sensor is arranged at a certain distance from the packaging material in order to scan a wide range.
[0006]
In order for the imaging device 24 to capture the imaging area accurately and clearly and to capture the print A as a clear image, the illuminating device 23, the imaging device 24, and metal fittings for fixing them are arranged in a packaging machine. Space is needed. Further, in order to capture a certain print area to be inspected as a clear image, it is necessary to appropriately initialize the imaging device 24. However, the packaging machines have a wide variety of forms, and the available space varies depending on the packaging machine. Further, since the downsizing has conventionally been attempted, the surplus space is also narrowed. Therefore, a space that can be used for the illumination device 23, the imaging device 24, and the metal fittings for them cannot be secured, and as shown in FIG. 4B, a short distance between the printing surface and the imaging device due to the installation space. Since only Lb can be obtained, an imaging device 24b having a wide-angle lens must be used. Since the captured image captured by the imaging device 24b is distorted particularly in the periphery thereof, it may be difficult to determine whether or not the printing A is in a normal printing state. When the imaging area becomes long because the area of the printing A is long, as shown in FIG. 4C, a longer distance Lc is required between the printing surface and the imaging device 24c.
[0007]
In the conventional print inspection configured as described above, a captured image is captured in an image processing apparatus, and whether or not printing is appropriate is determined based on the captured image and pre-registered information. Setting is very complicated. FIG. 5 shows an example of image processing setting. FIG. 5A shows an example of actual printing. The character 31 and date 32 of “expiration date” are printed, the character 33 and date 34 of “manufacturing date”, the character 35 of “counter” indicating the production lot and number, its numerical value 36, and the manufacturing information. The case where the printing is made up of the barcode 37 including will be described. In the setting screen, coordinate data indicating the position and range of each print area to be printed, the type of print font, and attributes / formats such as item / date / time are individually set and registered. In the inspection, each print range is designated and compared with setting data stored in advance. For the characters 31, 33, 35, the dates 32 and 34, the numerical value 36, and the barcode 37, character comparison, numeric comparison, or barcode pattern comparison is performed between the captured image and the setting data, respectively.
[0008]
In the image processing setting, for each of the characters 31, 33 and 35 of “best before date”, “manufacturing date”, and “counter”, in detail, a range and a position are registered as characters, and the registered settings It is inspected whether or not there are any defects compared to the data. The expiry date 32, the date of manufacture date 34, and the counter value 36 are the position, range, and display format (year, month, day separators (“/” or “.”), Numeric digits, respectively. Etc.) are registered as setting data, and it is checked whether they are correctly printed and can be correctly recognized as numbers. In addition, the expiration date is correctly printed on the date after the specified number of days from the current time, whether the date of manufacture is correctly printed compared to the current time, and the numerical value 36 of the counter It is inspected whether it is a number that changes from product to product. Further, for the bar code 37, its position, range, and code pattern are registered as setting data, and it is inspected whether it is printed correctly.
[0009]
For the image processing apparatus, as described above, for the characters 31, 33, and 35 for each print type, the position / type / orientation / size / inspection level is set, and the date / time comparison of date characters 32, 34, etc. is performed. It is necessary to set many items such as a recognition setting or a setting for the number 35 whose number changes such as a serial number. Shooting characters, numbers, and symbols are not only different in size and font, but even if they have the same print pattern, if there are changes in conditions such as the camera and its installation distance, lens type and specifications, etc. Since the printing position, range, and size of each item in the image change, the inspection apparatus needs to be reset every time the camera is installed. To register the inspection item settings, take a sample image taken with the camera, display it on the display, select the character position range on the setting screen while watching the sample display, and set the conditions individually. It is complicated and requires many operations. Such initial settings are very complex and require a lot of time and skill of the workers. FIG. 5B shows how the actual character size and position shown in FIG. 5A change depending on the installation position of the camera and the like. In some cases, the image may be distorted, particularly at positions such as the four corners.
[0010]
An inspection method for a printing mechanism that performs printing on a sheet by selectively turning on or off a plurality of print pixels arranged in a direction substantially perpendicular to the sheet conveyance direction. Using a CCD line sensor having a plurality of image acquisition pixels arranged in a substantially perpendicular direction with respect to each other, the reflected light amount data of the inspection area provided on the paper is acquired, and the acquired adjacent image acquisition pixels A method for inspecting a printing mechanism for a printing defect such as a white defect based on reflected light amount data has been proposed (see Patent Document 1).
[0011]
[Patent Document 1]
JP 2002-328097 A (paragraphs [0034] to [0047], FIGS. 4 to 9)
[0012]
[Problems to be solved by the invention]
  ThereforeIn a packaging printing inspection system attached to a packaging machine for packaging products,Packaging materials andAffixed to such packagingIt is applied on the printing surface of the substrate such as a label, Packaging of products etc.When inspecting the printing state of the device by image processing, the inspection item settings such as the recognition setting are performed using data created in advance at the time of printing.Set inImprove the efficiency of regular workAt the same time, build a system that is suitable for running web-like packaging materials for product packagingThere is a problem to be solved in terms of points.
[0013]
  The object of the present invention is to quickly set inspection items that are the most time-consuming work in print inspection, improve the work efficiency of print inspection, and work such as a preparation period until the start of packaging. Significantly reduce timeAt the same time, it is suitable for running web-like packaging materials accompanying product packaging, and it is easy to build a system at low cost.EnableFor packagingTo provide a print inspection system.
[0014]
[Means for Solving the Problems]
  In order to solve the above problems, according to the present invention.For packagingPrint inspection systemA packaging printing inspection system attached to a packaging machine that wraps a product with a web-like packaging material, and includes information on packaging of the product, including letters, numbers, or symbolsBased on print dataA web-like packaging material used for packaging the product or a label attached to the packaging materialPrinting device for printing onA label on or affixed to the packaging materialOn the above printingA direction perpendicular to the feeding direction of the packaging material is a main scanning direction, and a feeding direction of the packaging material is a sub-scanning direction.A reading device, and from the reading deviceLine by main scanningRead dataAnd two-dimensional image data obtained from the packaging material feed amount data corresponding to the sub-scanningBased onTheThe recognition data obtained by recognition is used as the verification source.Determined by the print dataA printing inspection device for inspecting the suitability of printing by comparing with reference data is provided.GetIt consists of that.
[0015]
  thisFor packagingAccording to the print inspection systemThe packaging printing inspection system is attached to packaging machines that wrap products in web-like packaging materials,The printing deviceHas information on packaging of the product etc. including letters, numbers or symbolsBased on print dataA web-like packaging material used for product packaging or a label affixed to the packaging materialTo print. The print data is used in the print inspection apparatus. The reading device was applied by the printing deviceWeb-like packaging or labelPrint onThe direction perpendicular to the packaging material feed direction is the main scanning direction, and the packaging material feed direction is the sub-scanning direction.Read and send a read signal to the print inspection device. The print inspection device is determined from the print dataThe verification sourceReference data and from readerLine by main scanningRead dataAnd two-dimensional image data obtained from packaging material feed amount data corresponding to sub-scanningThe print data is checked against the recognition data recognized on the basis of the print data to determine whether printing is appropriate. Therefore, in the print inspection apparatus, the print data can be used, and it is not necessary to input the print data again from the keyboard or the like for inspection, and there is no input error.In both cases, the printing inspection system for packaging is easily and inexpensively adapted to the running of the web-like packaging material accompanying the packaging of the product.
[0016]
  thisFor packagingIn print inspection system, InspectionThe print to be inspected and the print printed as letters, numbers or symbols having information relating to the packaging;is doing. As printing related to packaging, there is printing related to contents such as products to be packaged. When the contents are food, it is common to include important information such as ingredients and expiration dates, and it is not allowed to make mistakes that pass defective prints as normal. In the print inspection apparatus, the print data is used as reference data of the inspection collation source, so that there is no room for an input error when the setting is re-input for the print inspection. Therefore, the accuracy of the print inspection is expected.
[0017]
  In this packaging printing inspection system, the packaging material feed amount data is detected by a packaging material feed amount detected by an encoder that rotates while in contact with the packaging material, or by a packaging material feed amount detection means provided in the packaging machine. It can be said that it is a packaging material feed amount. In particular, when using the packaging material feed amount detected by the packaging material feed amount detection means provided in the packaging machine, the detection data of the packaging material feed amount detection means can be diverted, and the system can be simplified and reduced in cost. Can do.
[0018]
  For this packagingIn the printing inspection system, the reading deviceAre arranged along the main scanning directionWith line sensorIlluminating the printed area on the web-like packaging material or on the label upon reading by the line sensorScanner head integrated with lightingCan be provided.The scanner head as a reading device is an easily available device, and the line sensorWebThe printing on the packaging material or label is sequentially read with the direction orthogonal to the paper feed as the main scan and the paper feed direction as the sub-scan direction.become. The line sensor is a sensor having a fixed distance from the detection surface to be scanned and a fixed number of pixels per unit dimension. Since the data read by the line sensor is homogeneous data that does not require image adjustment in the length direction, editing to inspection image data is easy. Also scanner headWith the illumination provided in the line sensor, the line sensor and the illumination can be handled together, and the printed area on the web-shaped packaging material or on the label can be illuminated appropriately. And scanner headCan be handled together with the printing device, and the two devices can be arranged in a space-saving and compact manner. It becomes.
[0019]
  the aboveFor packagingIn the print inspection system, the print data includes item data for one or a plurality of print items, and the print items are printed.On the web-like packaging material or on the labelPosition data for the print position above, andThe letters, numbers or symbolsType, size, etc.Genus ofSex data can be included. Using print data as reference data, item data, position data andGenusSex dataMarkBy using the inspection item for the print inspection, it is possible to inspect whether the printing is performed accurately in accordance with the print data.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, based on the accompanying drawings, according to the present invention.For packagingAn embodiment of the print inspection system will be described. FIG. 1 shows a print inspection system according to the present invention.(Hereinafter, abbreviated as “printing inspection system” in the description of the embodiments)FIG. 2 is a schematic view showing an example of the arrangement of the reader used in the print inspection system shown in FIG.
[0021]
The printing inspection system 1 shown in FIG. 1 uses a packaging film F having one form of a web-shaped packaging material as an object to be printed, and prints of characters, numbers, symbols, etc. printed on the packaging film F are appropriately printed. This is an inspection system. The print inspection system 1 includes a printing device 2 such as a hot roll printer or a thermal printer that performs printing on the surface of the packaging film F based on the set print data Dp at a predetermined position in the paper feed path of the packaging film F. A print control device 3 that outputs a print command signal to the printing device 2, a scanner head 4 as a reading device that reads the print A on the packaging film F printed by the printing device 2, and read data Ds from the scanner head 4. A printing inspection apparatus 5 for inspecting the suitability of printing by comparing with reference data Dr as a collation source is provided as its basic configuration. The print inspection apparatus 5 is supplied with count data from an encoder 6 that detects the paper feed amount of the packaging film F.
[0022]
On the surface of the packaging film F, information relating to packaging, that is, information relating to contents such as products to be packaged, is directly applied as printing using letters, numbers or symbols. Specifically, the print A inspected by the print inspection system 1 is such a print. In relation to the print control device 3 that controls printing by the printing device 2, an input device 10 such as a keyboard and a display 11 for displaying a setting screen are provided for setting the print data Dp. The means for setting the print data Dp is not limited to this. For example, a reading device (not shown) that can read and read various recording media on which the print data Dp set elsewhere is read is controlled. The print data Dp can be attached to the apparatus 3 or downloaded to the print control apparatus 3 online by communication means using a connection line or the like. The print control device 3 includes a print data storage unit 12 that stores the read print data Dp and a print driver unit 13 that drives the printing device 2.
[0023]
The scanner head 4 is a miniaturized reading device configured by integrating a line sensor and illumination, and is a reading device that can be easily obtained in the market. The scanner head 4 is arranged on the downstream side of the paper feeding direction in the printing apparatus 2, and the line sensor is attached with the main scanning as the line direction orthogonal to the paper feeding and in which the sensors are arranged, and the paper feeding direction as the sub-scanning direction. The printing A printed on the packaging film F is sequentially read. As a result, the scanner head 4 can be disposed at a position closer to the packaging film F as compared with a camera that captures a certain range two-dimensionally, and the required installation space can also be reduced. By using the scanner head 4, the detection distance is very close and constant to the packaging film F, so that the brightness that illuminates the printing area is uniform and the influence of ambient light is reduced. Further, the number of pixels per unit dimension at the time of reading is also constant. Therefore, unlike the case of a camera, there is no distribution in the brightness or darkness or brightness of the illumination depending on the intensity, position, or direction of the illumination. There will be no unevenness or distortion.
[0024]
The scanner head 4 that reads the print A is attached to the wall surface 2 a on the downstream side of the packaging film F in the paper feeding direction in the printing apparatus 2. As a result, the printing apparatus 2 and the scanner head 4 can be handled as an integrated apparatus, and the scanner head 4 can always follow the printing apparatus 2 when the arrangement and position of the printing apparatus 2 are changed. Moreover, since the space | interval between the printing head of the printing apparatus 2 and the scanner head 4 can be shortened as much as possible, the printing inspection system 1 is comprised compactly, and the space which the printing inspection system 1 occupies in a packaging apparatus is occupied. It can be made as small as possible. The print A on the packaging film F is read by the scanner head 4 immediately after being printed by the printing apparatus 2 and then moved a short distance by paper feed of the packaging film F.
[0025]
The print inspection apparatus 5 receives line image information as read data Ds read by the line sensor of the scanner head 4 and count data from the encoder 6 that detects the paper feed amount of the packaging film F, and performs image processing. It has a function as a processing device. Image capture is started in response to a mark detection signal for detecting the mark M on the packaging film F and a timing signal from the packaging machine or the printing apparatus 2. Inspection image data to be printed and inspected by taking a line image from the scanner head 4 for each fixed dimension from a predetermined position corresponding to the mark detection signal of the packaging film F and forming a two-dimensional image of a predetermined range including the print A Dt is obtained. From the inspection image data Dt, characters, numbers, symbols, and the like are recognized by application of recognition software, and recognition data Du that can be used for verification is obtained.
[0026]
FIG. 2 is a schematic view showing an arrangement mode of the scanner head in the print inspection system according to the present invention. The scanner head 4 can be installed not only in the case where the packaging film F is running flat as shown in FIG. 2 (a) but also in the direction changing portion by the roller 18 as shown in FIG. 2 (b). Compared to the installation conditions of the conventional imaging device, the installation conditions of the scanner head 4 are greatly relaxed.
[0027]
  In the print inspection system 1, the print data Dp set in the print control device 3 is used as reference data Dr from which the print inspection device 5 collates. In the illustrated example, the print control device 3 and the print inspection device 5 are connected by the connection cable 14, and the print data Dp stored in the print data storage unit 12 is transmitted to the print inspection device 5 by the connection cable 14. The The reference data Dr is stored in the reference data storage unit 15 based on the transmitted print data Dp. By using the print data Dp for print items, positions, character types and attributes, numbers, etc. on the print inspection apparatus 5 side, complicated setting of reference data having the same content as the print data Dp is automatically performed. Can do. The same character or symbol can be detected under the same conditions for size, position, etc., and a reduction in detection accuracy can be avoided.It should be noted that the recognition data Du that recognizes a character such as a character from the inspection image data Dt and converts it into data is a character portion (non-character portion such as a ruled line in the table) that needs to be verified from the print data Dp that also designates the character. Can be collated with the reference data Dr.Furthermore, as shown in FIG. 4C, even if the detection length is increased, the number of scanning lines for capturing a line image can be increased without increasing the distance between the printing surface and the scanner head 4. The uptake range can be expanded. The use of the print data Dp has shown the structure of the connection cable 14, but the present invention is not limited to this, and a method of storing it in an arbitrary medium and causing the print inspection apparatus 5 to read it can also be used.
[0028]
As described above, in the print inspection apparatus 5, it is not necessary to input and set data as a reference for comparison and comparison, the setting work is simple, quick and error-free, and various setting work burdens for inspection. Is greatly reduced. The print inspection apparatus 5 does not necessarily require the operation board 16 and the display 17 for input setting of the reference data Dr, except when used for special setting or setting change.
[0029]
In the print inspection system 1, the print data Dp includes item data for one or a plurality of print items that can be expressed as numerical values such as the expiration date, the date of manufacture, and the counter, as already described with reference to FIG. Position data about the printing position on the packaging film on which the print item is printed, and character attribute data such as the type and size of the character when the print item includes a character. By using the print data Dp as the reference data Dr in the print inspection apparatus 5 and using the item data, position data, character attribute data, etc. included in the print data Dp as inspection items for the print inspection, By checking whether or not the recognized data Du obtained by the recognition matches the print data Dp, it is possible to check whether printing is performed exactly as the print data Dp.
[0030]
The operation of the print inspection system 1 shown in FIG. 1 will be described. First, when printing on a packaging film F that is a printing object, print data Dp is set in the print control device 3 by means such as input and reading. The printing apparatus 2 performs printing on the packaging film F in accordance with a print command signal that the print control apparatus 3 outputs based on the print data Dp. In a thermal printer as an example of the printing apparatus 2, the printing dots per unit are determined in advance, and the printing content (date, characters, pattern, etc.) and printing position are also set. In a hot roll printer or the like, the type and size of the type and the printable position are determined. Therefore, it is possible to perform print inspection simply by registering the date and position at a predetermined position. The print data Dp is sent from the print control device 3 to the print inspection device 5 and used as reference data Dr in the print inspection device 5.
[0031]
The scanner head 4 as a reading device reads the printing of the packaging film F applied by the printing device 2 and sends the line image to the print inspection device 5 as read data Ds. By adopting the scanner head 4 incorporating the line sensor and illumination, the scanner head 4 can be arranged at a position close to the packaging film F. In addition, since the brightness and detection distance of the illumination are constant along the line sensor, the number of pixels per unit dimension is also constant and the photographing conditions are uniform, and in the inspection image data Dt, the same print pattern has any condition. However, it is formed as an image with the same size and position. Even if the detection range becomes long, the range can be expanded only by increasing the number of line image captures.
[0032]
The printing inspection device 5 is configured to mark the packaging film F on the basis of feed amount signals of the packaging film F from various devices such as an encoder 6 that detects the feeding amount of the packaging film F or a packaging machine disposed downstream thereof. In response to a signal from the mark detector for detecting M and a timing signal from the packaging machine or the printing apparatus 2, image capture is started. The print inspection apparatus 5 sequentially takes in the read data Ds from the scanner head 4 for each fixed dimension from a predetermined position, and forms a two-dimensional image in a fixed range including the print A. The two-dimensional image is subjected to image processing by means such as pattern recognition, thereby creating recognition data Du specifying the printed characters, numbers, and symbols. Next, the print inspection apparatus 5 collates the print data Dp from the print control apparatus 3 with the recognition data Du obtained by image processing, and determines whether printing is appropriate. Therefore, in the print inspection apparatus 5, the setting work can be speeded up and corrected using the print data Dp received from the print control apparatus 3. Further, it is not necessary to input the print data Dp again from the keyboard or the like for inspection, and input errors are eliminated.
[0033]
In the above-described printing inspection system, an example in which the packaging film F is used as a packaging material has been described. However, in the printing inspection system 1 according to the present invention, even when applied to packaging, packaging of paper, a synthetic resin film, or the like. The label attached to the packaging material which accommodated the material or the content may be sufficient. In the case of a label, it can be affixed in sequence to a web-like release paper and fed in the longitudinal direction. Further, the encoder 6 is not necessarily arranged in the system 1, and the film feed amount detected by the film feed amount detecting means provided as appropriate in a packaging machine or the like can be used. Furthermore, in the above-described print inspection system, the print data Dp is sent to the print inspection device 5 by the print command signal output from the print control device 3, but the printing device 2 detects the mark M on the packaging film F. When printing is performed, the print data Dp may be transmitted directly from the printing apparatus 2 to the print inspection apparatus 5.
[0034]
【The invention's effect】
  According to this inventionFor packagingAccording to the print inspection systemIt is a system attached to a packaging machine that wraps products to be packaged with web-like packaging materials, and is suitable for running web-like packaging materials accompanying product packaging. By using it, it is possible to construct a system easily and at low cost. Also,Since the reading device can be arranged at a position closer to the web-like packaging material or label, it is possible to perform from image capture to print inspection in a small space. Also,Reading the print area by main scanningLine imageWith the feed direction of the web-like packaging material as the sub-scanning directionImportDone byTherefore, without securing a flat constant space, for example, an image can be captured even in an area where the paper feed direction by the roller is changed. In addition, since the distance between the printing surface and the reading device is short, the influence of ambient light is reduced. Further, when the reading device is a line sensor, since the number of pixels per unit dimension is constant, the reading condition of reading data by the reading device does not change in the line direction of the sensor. As a result, by using print data such as the type of marking used in the printing device and printing attributes in the print inspection device (image processing device), characters, Numbers or symbolsThe complicated settings on the image processing apparatus side such as the type, position, size, and print contents can be automatically made without error. Since the scanner head can be attached to a small space, it can be attached to the printing apparatus and integrated with the printing apparatus. If the distance between the printing position and the scanner head is constant, all settings of the print inspection apparatus can be performed automatically. In the print inspection apparatus, since the print data used in the printing apparatus is used as reference data of the inspection collation source, there is no room for an input error when the setting is re-input for the print inspection. When the contents are food, it is normal to include important information when eating such as ingredients and expiration dates, and it is not allowed to make mistakes that pass defective prints as normal, With this print detection system, the accuracy of print inspection is expected.
[Brief description of the drawings]
FIG. 1 is in accordance with the present invention.For packagingIt is the schematic which shows one Example of a printing inspection system.
FIG. 2 is shown in FIG.For packagingIt is the schematic which shows the example of arrangement | positioning of the reader used by a printing inspection system.
FIG. 3 is a schematic diagram of a print inspection system as one of conventional print inspection systems.
FIG. 4 is a schematic diagram showing an aspect of a camera that is photographed at a distance of a certain distance or more from a packaging material as an imaging device as one of conventional print inspection systems.
FIG. 5 is a diagram illustrating an example of image processing setting.

Claims (4)

A printing inspection system for packaging attached to a packaging machine for packaging a product with a web-like packaging material,
A printing apparatus that prints on a web-like packaging material used for packaging of the product or a label attached to the packaging material based on printing data including information on packaging of the product or the like, including letters, numbers, or symbols, and the packaging A reading device that reads the printing on the material or on the label affixed to the packaging material as a main scanning direction in a direction orthogonal to the feeding direction of the packaging material and a sub-scanning direction as the feeding direction of the packaging material , and the reading be compared with reference data obtained by said print data comprising a recognition data obtained by based rather recognizes that line reading data in a two-dimensional image data obtained from a feed amount data of the packaging material from the device and the collation source packaging printing inspection system consists in comprising a printing inspection apparatus for inspecting the appropriateness of the printing by. The web-like packaging material feed amount data is the packaging material feed amount detected by the encoder rotating while contacting the web-like packaging material, or the packaging material feed amount detected by the packaging material feed amount detecting means provided in the packaging machine. The printing inspection system for packaging according to claim 1, comprising: The reading device is a scanner in which a line sensor arranged along the main scanning direction and an illumination for illuminating a printing area on the web-shaped packaging material or on the label at the time of reading by the line sensor are integrated. The printing inspection system for packaging according to claim 1 or 2 , further comprising a head. The print data includes item data for one or a plurality of print items, position data for a print position on the web-shaped packaging material or the label on which the print items are printed, and the letters, numbers, or symbols. type, packaging printing inspection system according to claim 1 which comprises containing the attribute data such as the size.

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