Print inspection apparatus

Abstract

To provide a print inspection device advantageous for accurately and efficiently determining the quality of a print formed on a packaging film.SOLUTION: A film transport path 14 for transporting a light-transmitting packaging film 24 includes an imaging unit 28 that captures an image of a print formed on a front 24A portion of the packaging film 24 from the front 24A portion of the packaging film 24 to generate an image, and a determination unit 30 that determines the quality of the print based on the image, and a back plate 32 that presents a color that enhances the contrast of the image is provided on a back 24B side of a portion of the packaging film 24 imaged by the imaging unit 28. Since the contrast of the image captured by the imager 28 is enhanced, the contrast between the print and the portion other than the print in the image generated by the imager 28 can be sufficiently ensured without being affected by the state of the print such as the hue, brightness, saturation, and density.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a print inspection device. [Background technology]

[0002] 2. Description of the Related Art There is provided a form-fill-seal machine that packages items such as food in packaging bags formed from packaging film supplied from a raw roll. In this case, information such as the expiration date and food name is printed by a printing unit on the surface of the packaging film supplied from the original roll. However, if the printing on the packaging film is unclear or there are missing prints due to a malfunction or improper adjustment of the printing unit, the items on which the printing was not performed correctly must be rejected as defective, or the operation of the form-fill-seal packaging machine must be immediately stopped and the printing unit must be repaired or adjusted. For this reason, a print inspection device has been proposed that includes an imaging unit that captures an image of the packaging film and generates an image, and a judgment unit that judges whether the print formed on the packaging film is good or bad based on the image generated by the imaging unit (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-109033 Summary of the Invention [Problem to be solved by the invention]

[0004] In such conventional devices, for example, if the packaging film is made of a light-transmitting film, depending on the hue, brightness, saturation, density, etc. of the print, it may be impossible to ensure sufficient contrast between the print and the non-printed parts of the image generated by the imaging unit. If the above contrast cannot be ensured, the judgment unit will be at a disadvantage in clearly reading the printed image, and therefore will not be able to accurately recognize the print, which will be disadvantageous in accurately and efficiently determining whether the print is good or bad by the judgment unit. Therefore, there is room for improvement in accurately determining whether the print formed on the packaging film is good or bad, regardless of the state of the print. The present invention has been devised in view of the circumstances, and an object of the present invention is to provide a print inspection device that is advantageous in accurately and efficiently determining whether print formed on packaging film is good or bad. [Means for solving the problem]

[0005] In order to achieve the above-mentioned object, one embodiment of the present invention is a print inspection device that is provided in a film transport path that transports a light-transmitting packaging film, and that includes an imaging unit that captures an image of a print formed on the surface of the packaging film from the surface of the packaging film to generate an image, and a judgment unit that judges the quality of the print based on the image, and is characterized in that a back plate that presents a color that emphasizes the contrast of the image is provided on the back side of the part of the packaging film that is imaged by the imaging unit. Furthermore, one embodiment of the present invention is characterized by further comprising an illumination unit that irradiates light onto the surface of the packaging film at the location where the printing is formed. In one embodiment of the present invention, the color that enhances the contrast of the image is determined in accordance with the colors that make up the print. In addition, one embodiment of the present invention is characterized in that when the colors that make up the print are a first color and a second color that are different from each other, the color that enhances the contrast of the image is a single color that enhances the contrast of the image with respect to both the first color and the second color. In addition, one embodiment of the present invention is characterized in that a plurality of back plates having different colors are provided, and when the area on the surface of the packaging film on which the printing is formed and imaged by the imaging unit is defined as an imaging area, a back plate support mechanism is provided to position the back plate on the back surface of the packaging film corresponding to the imaging area, and the back plate support mechanism is provided so that the plurality of back plates can be interchangeable. In one embodiment of the present invention, the backplate is configured to include a plate support plate and a colored resin sheet attached to an upper surface of the plate support plate, the backplate support mechanism is configured to include a first bracket provided on a frame on the rear side of the film transport path, a second bracket provided on a frame on the front side of the film transport path, a first attachment member provided on a lower surface of the plate support plate at an end on the rear side of the film transport path, and a second attachment member provided on a lower surface of the plate support plate at an end on the front side of the film transport path, and the first bracket is attached to the lower surface of the plate support plate in the width direction of the backplate. a first pin extending in the longitudinal middle of the back plate and spaced apart in the longitudinal direction, and a second pin of a length to be inserted into the first mounting member, the first mounting member being provided with a first pin insertion hole allowing the first pin to be inserted therethrough, and a second pin groove allowing the second pin to be inserted therethrough and having an open end on the side remote from the first pin insertion hole, the first pin being inserted into the first pin insertion hole, the second pin being inserted into the second pin groove, and the second bracket and the second mounting member being attached, whereby the back plate is disposed on the front frame and the rear frame of the film transport path. In addition, one embodiment of the present invention is characterized in that the backplate is composed of the plate support plate and a colored resin sheet attached to the upper surface of the plate support plate, and the backplate support mechanism is composed of a first bracket provided on a frame on the back side of the film transport path, a second bracket provided on a frame on the front side of the film transport path, and a backplate mounting plate that spans the first bracket and second bracket, has a cross section that is horizontal in the transport direction of the packaging film, and has an upper surface on which the plate support plate is removably attached. In addition, one embodiment of the present invention is characterized in that the back plate is composed of a plate support plate and a plurality of resin sheets of different colors arranged on the upper surface of the plate support plate in the direction in which the packaging film is transported, and a back plate support mechanism is provided that supports the plate support plate in a manner that allows it to be moved and adjusted in the direction in which the packaging film is transported, so that when the area on the surface of the packaging film on which the printing is formed and imaged by the imaging unit is defined as the imaging area, each of the plurality of resin sheets is selectively positioned on the back surface of the packaging film corresponding to the imaging area. [Effects of the Invention]

[0006] According to one embodiment of the present invention, a back plate with a color that enhances the contrast of the image is provided on the back side of the portion of the packaging film imaged by the imaging unit, and the contrast of the image imaged by the imaging unit is enhanced, thereby ensuring sufficient contrast between the print and the non-printed portions in the image generated by the imaging unit without being affected by the hue, brightness, saturation, density, etc. of the print. This is advantageous for the judging unit to accurately recognize the print by clearly reading the print image, and is advantageous for accurately and efficiently judging the quality of the print formed on the packaging film. In addition, providing an illumination unit that irradiates light onto the surface of the packaging film where the printing is formed is advantageous in ensuring the clarity of the image captured by the imaging unit, and is even more advantageous in allowing the judging unit to accurately and efficiently judge whether the printing formed on the packaging film is good or bad. Furthermore, by determining the color that emphasizes the contrast of the image in accordance with the color that constitutes the print, when the print section is capable of printing in multiple colors, the contrast of the image can be appropriately emphasized according to the color, which is more advantageous for the judgment section to accurately and efficiently judge whether the print formed on the packaging film is good or bad. Furthermore, when the colors that make up the print are a first color and a second color that are different from each other, using a single color that enhances the contrast of the image for both the first color and the second color is advantageous in accurately and efficiently determining the quality of the print that mixes the first color and the second color. Furthermore, if a plurality of backplates of different colors are provided, a backplate support mechanism is provided for positioning the backplates on the back surface of the packaging film corresponding to the imaging area, and the backplate support mechanism is provided so that the plurality of backplates can be replaced, and if a plurality of backplates are prepared according to the color printed by the printing unit, when the print color is changed, the backplate corresponding to the print color can be selected and easily replaced, and the contrast of the image can be appropriately emphasized according to the print color. This is more advantageous in that the quality of the print formed on the packaging film can be accurately and efficiently determined by the judging unit. Furthermore, if a first pin and a second pin of different lengths are provided on a first bracket located on the rear side of the film transport path, and a first mounting member provided at the end of the rear side of the film transport path is provided with a first pin insertion hole that allows the first pin to be inserted and a second pin groove that allows the second pin to be inserted, this is advantageous in that even if there is only a narrow space on the rear side of the underside of the film transport path, the backplate can be easily and reliably positioned by operating only from the front side of the film transport path. Furthermore, if the backplate support mechanism is configured to include a first bracket provided on the frame on the back side of the film transport path, a second bracket provided on the frame on the front side of the film transport path, and a backplate mounting plate that spans the first and second brackets, has a cross section that is horizontal in the transport direction of the packaging film, and has a plate support plate removably attached to its upper surface, the plate support plate is overlapped on the backplate mounting plate, which is advantageous in terms of increasing the durability of the backplate. Furthermore, if the backplate includes a plate support plate and a plurality of resin sheets of different colors arranged on the upper surface of the plate support plate in the direction in which the packaging film is conveyed, and a backplate support mechanism is provided that supports the plate support plate so that each of the plurality of resin sheets is selectively positioned on the back surface of the packaging film corresponding to the imaging area when the portion of the surface of the packaging film on which the print is formed that is imaged by the imaging unit is the imaging area, and if the plurality of resin sheets are arranged on the upper surface of the plate support plate according to the colors printed, when the print color is changed, it is sufficient to select and move the resin sheet corresponding to the print color, thereby accurately enhancing the contrast of the image according to the print color. This is advantageous for accurately and efficiently determining the quality of the print by the judging unit, and is also advantageous for improving work efficiency because it requires only a very simple operation, such as adjusting the position of the backplate according to the color printed by the printing unit. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a front view of an overall configuration of a form-fill-seal packaging machine including a print inspection device according to a first embodiment. [Figure 2] FIG. 2 is an exploded perspective view showing a part of a backplate and a backplate support mechanism according to the first embodiment. [Figure 3] FIG. 10 is an exploded perspective view showing the remaining portion of the backplate and the backplate support mechanism according to the first embodiment. [Figure 4]4A and 4B are perspective views illustrating the replacement work of the back plate according to the first embodiment. [Figure 5] 1A and 1B are assembly views showing a state in which the backplate according to the first embodiment is attached to a backplate support mechanism, where FIG. 1A is a perspective view seen from above, and FIG. 1B is a perspective view seen from below. [Figure 6] FIG. 10 is a perspective view of a backplate and a backplate support mechanism according to a second embodiment. [Figure 7] FIG. 10 is a perspective view of a back plate according to a second embodiment. [Figure 8] FIG. 10 is an exploded perspective view of a backplate and a backplate support mechanism according to a third embodiment. [Figure 9] An explanatory diagram showing the state in which the first resin sheet in the third embodiment is positioned on the back side of the packaging film in the imaging area, where (A) is an oblique view from above and (B) is an oblique view of (A) flipped upside down. [Figure 10] An explanatory diagram showing the state in which the second resin sheet in the third embodiment is positioned on the back surface of the packaging film in the imaging area, where (A) is an oblique view from above and (B) is an oblique view of (A) turned upside down. DETAILED DESCRIPTION OF THE INVENTION

[0008] (First embodiment) The first embodiment will be described with reference to the drawings. First, the form-fill-seal machine will be described with reference to FIG. The form-fill-seal packaging machine 10 is configured to include a raw roll support section 12, a film transport path 14, a printing section 16, a print inspection device 18, and a form-fill-seal section 20. In the following drawings, arrow F indicates the transport direction of film transport path 14, symbol U indicates the upward direction, and symbol D indicates the downward direction. The web support section 12 supports a web of film 22 . The film roll 22 is a light-transmitting packaging film 24 wound around a paper tube (not shown) with its front surface 24A facing radially inward and its back surface 24B facing radially outward of the film roll 22. In this specification, the light-transmitting packaging film 24 may be any film that transmits light, and includes a transparent packaging film 24, a translucent packaging film 24, or a milky white packaging film 24. Furthermore, the packaging film 24 may be plain, or may have a continuous pattern (background pattern) or a design such as a product name on the part other than the part where printing will be performed, or may be processed to be opaque to light on the part other than the part where printing will be performed; in short, it is sufficient that the part where printing will be performed is light-transmitting.

[0009] Packaging film 24 unwound from film roll 22 supported by roll support section 12 is transported along film transport path 14 to printing section 16, where printing is formed on surface 24A of packaging film 24. The packaging film 24 on which the printing has been formed is transported to the print inspection device 18, where the quality of the printing is judged, and then the film is transported to the bag making and filling section 20. The printing unit 16 forms print on the surface 24A of the packaging film 24 in the film transport path 14. If the product to be enclosed in the packaging bag made from packaging film 24 in bag making and filling unit 20 is a food product, the printing unit 16 prints, for example, the expiration date and the name of the food product. As the printing unit 16, a wide variety of conventionally known printer devices such as thermal printer devices, hot roller printer devices, inkjet printer devices, and laser marker devices can be widely applied, and in recent years, ultraviolet (UV) laser marker devices have increasingly been used as laser marker devices. The color of the print formed on the surface 24A of the packaging film 24 by the printing unit 16 is black, white, or another color, and is changed appropriately depending on the type of product.

[0010] In the bag making and filling section 20, for example, in a vertical bag making and filling device, printed packaging film 24 is transported while being formed into a cylindrical shape, and the widthwise ends of the packaging film 24 are joined to form a vertical joint to form a tubular film, the lower longitudinal end of this tubular film is joined to form a lower horizontal joint, an item is supplied into this tubular film, and then the upper end of the tubular film is joined to form an upper horizontal joint and the lower half of the upper horizontal joint is cut off, and packages with items sealed inside packaging bags are sequentially produced. The bag making and filling section 20 is not limited to the above-described vertical bag making and filling apparatus, and various conventionally known devices can be used. Furthermore, the form-fill-seal machine 10 typically packages multiple types of goods, and the dimensions and design of the packaging film 24 used for each type of goods often differ, and the color of the printing on the packaging film 24 also often differs depending on the type of goods. Therefore, every time the type of product to be packaged changes, setup changes are required, such as changing the film roll 22, adjusting the bag making and filling section 20, and changing the printing color settings of the printing section 16.

[0011] Next, the print inspection device 18 of this embodiment will be described in detail. The print inspection device 18 includes a film transport path 14 , an illumination unit 26 , an imaging unit 28 , a determination unit 30 , and a back plate 32 . The film transport path 14 is the location where the packaging film 24 unwound from the film roll 22 is transported, and although neither is shown in the figure, the film transport path 14 is configured to include a plurality of guide rollers that guide the packaging film 24 and a transport mechanism that unwound the packaging film 24 from the film roll 22. In this embodiment, the packaging film 24 is described as being transported on the film transport path 14 with its surface 24A facing upward, in a substantially horizontal direction from a location upstream of the printing unit 16 to the bag making and filling unit 20, but the packaging film 24 may also be transported at an angle to the horizontal plane or in a vertical direction.

[0012] The lighting unit 26 is positioned downstream of the printing unit 16 and upstream of the bag making and filling unit 20 in the conveying direction of the film conveying path 14, facing the film conveying path 14, and irradiates light onto the surface 24A of the packaging film 24 where the printing is formed.

[0013] The imaging unit 28 captures an image of the print formed by the printing unit 16 from the surface 24A of the packaging film 24 to generate an image (image information). Here, the image includes the print and the background excluding the print. As the imaging unit 28, various conventionally known imaging devices such as a CCD camera can be used. Furthermore, the image generated by the imaging unit 28 may be a black and white image (monochrome image) or a color image.

[0014] The judgment unit 30 is configured by, for example, a computer that executes a program, and judges whether the printing is good or bad based on the image obtained by the imaging unit . Specifically, the judgment unit 30 uses conventional image processing to recognize whether the printing is unclear or whether there are any missing prints from the image obtained by the imaging unit 28, and judges whether the printing is good or bad based on the results. The judgment result is supplied from the judgment unit 30 to a control device (not shown) that controls the make-fill-seal packaging machine 10. If the judgment unit 30 judges that the printing is defective, the control device will eject the item on which the incorrect printing was formed as a defective product, or immediately stop the operation of the make-fill-seal packaging machine 10, and notify the operator of the occurrence of the printing defect by turning on (flashing) a warning light or sounding an alarm, and perform the necessary processing such as prompting the operator to take action such as adjusting the printing unit 16 or repairing the malfunction.

[0015] The back plate 32 is provided on the back surface 24B side of the packaging film 24 that is imaged by the imaging unit 28, and the back plate 32 has a color that emphasizes the contrast of the image obtained by the imaging unit 28. More specifically, the back plate 32 has a color that emphasizes the contrast between the print and the background excluding the print. The colors that enhance the contrast of the image are determined in accordance with the colors that make up the print. For example, if the color constituting the print is black, white can be used as the color of the back plate 32 to enhance the contrast of the image. Furthermore, if the color constituting the print is white, black can be used as the color of the back plate 32 to enhance the contrast of the image. The color of the back plate 32 may be any color that enhances the contrast of the image, and is not limited to the above-mentioned black or white. By using the back plate 32 to enhance the contrast of the image in this way, the print can be more clearly recognized by image processing by the judgment unit 30, which is advantageous in accurately and efficiently judging whether the print is good or bad.

[0016] Furthermore, if the colors that make up the print are a first color and a second color that are different from each other, the color that enhances the contrast of the image may be a single color that enhances the contrast of the image relative to both the first color and the second color. For example, if the first color is black and the second color is white, blue can be employed as a single color that enhances the contrast of the image relative to both the first and second colors. It should be noted that the single color that enhances the contrast of the image relative to both the first and second colors can be determined experimentally; in other words, the hue, brightness, saturation, density, etc. that define the single color can be determined experimentally.

[0017] In this embodiment, the back plate 32 is composed of a plate support plate 36 and a resin sheet 37 attached to the upper surface of the plate support plate 36 and having a color that enhances the contrast of the image obtained by the imaging unit 28. As shown in Figure 5(A), the resin sheet 37 is formed from a synthetic resin plate of a single color (for example, a polypropylene sheet of approximately 0.4 mm in thickness), and in this embodiment, the resin sheet 37 is in the shape of a long, narrow rectangular plate having a length perpendicular to the conveying direction of the film conveying path 14 and a width shorter than the length. As shown in FIG. 2, the plate support plate 36 is made of synthetic resin or metal, and in this embodiment is made of sheet metal. The plate support plate 36 has a width approximately equal to that of the resin sheet 37 and a length slightly greater than that of the resin sheet 37, and is equipped with a support plate main body 3602 that supports the resin sheet 37 by superimposing it on its upper surface, and an upright piece 3604 that rises downward from one end of the width direction of the support plate main body 3602 and extends over the entire longitudinal length of the support plate main body 3602. In this embodiment, a resin sheet 37 is attached to the upper surface of the support plate main body 3602 with an adhesive.

[0018] In this embodiment, the back plate 32 has an elongated shape and is provided with its longitudinal direction perpendicular to the conveying direction of the film conveying path 14 , in other words, the longitudinal direction of the packaging film 24 . More specifically, the imaging unit 28 and the illumination unit 26 are mounted on the printing unit 16 via brackets (not shown), and the backplate 32 is mounted on the frame of the film transport path 14 via a backplate support mechanism 34. The backplate support mechanism 34 detachably supports the plurality of backplates 32 . The backplate support mechanism 34 positions the backplate 32 on the back surface 24B of the packaging film 24 corresponding to the imaging area when the area on the surface 24A of the packaging film 24 where the printing to be imaged by the imaging unit 28 is formed is defined as the imaging area.

[0019] As shown in FIG. 2, the backplate support mechanism 34 includes a reinforcing member 38, a first mounting member 40, a second mounting member 42, and a third mounting member 44, and as shown in FIG. 3, a first bracket 46, a second bracket 48, a pin mounting portion 50, a first pin 52, and a second pin 54.

[0020] As shown in FIG. 2, the reinforcing member 38 has a long and thin columnar shape with a rectangular cross section and having substantially the same length as the support plate body 3602 . The reinforcing member 38 is attached to the lower surface of the support plate body 3602 in a state where it abuts against the upright piece 3604 on the lower surface of the support plate body 3602 . In detail, at one longitudinal end of the reinforcing member 38, which is on the back side of the film transport path 14, a screw N inserted through the screw insertion hole 3610 of the standing piece 3604 is screwed into a screw hole (not shown) at the end of the reinforcing member 38, and a screw N inserted through the screw insertion hole 3610 of the support plate main body 3602 is screwed into a screw hole 3812 of the reinforcing member 38. Furthermore, a screw N inserted through the screw insertion hole 3610 of the standing piece 3604 at the other longitudinal end of the reinforcing member 38, which is on the front side of the film transport path 14, is screwed into a screw hole (not shown) at the end of the reinforcing member 38. Furthermore, at the other longitudinal end of the reinforcing member 38, a second screw N2 (described later) inserted into the screw insertion hole 3610 of the support plate main body 3602 passes through the screw insertion hole 3810 of the reinforcing member 38 and threads into the screw hole 4212 of the second mounting member 42 (described later), thereby attaching the reinforcing member 38 together with the second mounting member 42 to the support plate main body 3602. Furthermore, a screw N inserted into a screw insertion hole 3610 of the standing piece 3604 at the intermediate portion of the reinforcing member in the longitudinal direction is screwed into a screw hole (not shown) at the intermediate portion of the reinforcing member .

[0021] As shown in FIG. 2, the first attachment member 40 is attached to one end in the longitudinal direction of the reinforcing member 38, which is on the rear side of the film transport path 14. The first attachment member 40 is attached to the reinforcing member 38 by inserting a screw N into a screw insertion hole 3810 of the reinforcing member 38 and threading it into a screw hole (not shown) of the first attachment member 40 . The first mounting member 40 is provided with a first pin insertion hole 4002 that penetrates the support plate main body 3602 in the longitudinal direction. In addition, the first mounting member 40 is provided with a second pin groove portion 4004 at the end away from the first pin insertion hole 4002 in the width direction of the support plate main body 3602, which penetrates the support plate main body 3602 in the longitudinal direction and is open in the width direction of the support plate main body 3602, i.e., has a U-shaped cross section with the end away from the first pin insertion hole 4002 open.

[0022] As shown in FIG. 2, the second attachment member 42 is attached to the other end of the support plate main body 3602 and the reinforcing member 38 in the longitudinal direction, which is on the front side of the film transport path 14. The second mounting member 42 is attached to the support plate main body 3602 by threading a first screw N1 inserted into a screw insertion hole 3610 of the support plate main body 3602 into a screw hole 4210 of the second mounting member 42. In addition, the second mounting member 42 is attached to the support plate main body 3602 together with the reinforcing member 38 by the second screw N2 inserted into the screw insertion hole 3610 of the support plate main body 3602 passing through the screw insertion hole 3810 of the reinforcing member 38 and screwing into the screw hole 4212 of the second mounting member 42.

[0023] As shown in FIG. 2, the third attachment member 44 is attached to one end in the longitudinal direction of the support plate main body 3602 and the reinforcing member 38 via the second attachment member 42 . The third attachment member 44 is attached to the second attachment member 42 by threading a screw N inserted into the screw insertion hole 4410 into the screw hole 4214 of the second attachment member 42 . At a location of the third mounting member 44 away from the support plate body 3602, screw insertion holes 4412 for the two male screw members 56 are provided. In this way, by assembling the reinforcing member 38, the first mounting member 40, the second mounting member 42, and the third mounting member 44 shown in Figure 2 to the plate support plate 36 of the back plate 32, a back plate unit 58 is formed as shown in Figure 4. A plurality of back plate units 58 are prepared for each different color of the resin sheet 37.

[0024] In Figure 3, symbol 46 indicates a first bracket provided on the frame on the back side of the film transport path 14, and symbol 48 indicates a second bracket provided on the frame on the front side of the film transport path 14, and the backplate unit 58 is replaceably positioned on the frame of the film transport path 14 via the first bracket 46 and the second bracket 48. The first bracket 46 provided on the frame on the rear side of the film transport path 14 is in the form of a plate having a thickness along the width direction of the film transport path 14. A pin mounting portion 50 is attached to the first bracket 46 via a screw N3, and a first pin 52 and a second pin 54 are attached to the pin mounting portion 50 with a toothed screw N4 at intervals in the width direction (the conveying direction of the film conveying path 14) perpendicular to the longitudinal direction of the back plate 32. As shown in FIG. 4, the first pin 52 is movably inserted into the first pin insertion hole 4002 of the first mounting member 40, and the second pin 54 is movably inserted into the second pin insertion groove 4004 of the first mounting member 40. As shown in Figure 5(B), the first pin 52 and the second pin 54 extend in a direction parallel to the longitudinal direction of the back plate 32, and the length L1 by which the first pin 52 protrudes from the pin mounting portion 50 is formed to a length that positions it at the middle part of the longitudinal direction of the back plate 32, and more specifically, is formed to a dimension that is shorter than 1 / 2 and greater than 1 / 3 of the length of the back plate 32, and the length L2 by which the second pin 54 protrudes from the pin mounting portion 50 is formed to a dimension that allows it to be inserted into the second pin insertion groove 4004. As shown in FIG. 3, tapered portions 5202 and 5402 are provided at the tip portions of the first pin 52 and the second pin 54, respectively, so that the tip portions of the first pin 52 and the second pin 54 can be easily inserted into the first pin insertion hole 4002 and the second pin insertion groove 4004. As shown in FIG. 4, second bracket 48 provided on the frame on the front side of film transport path 14 is provided with a screw hole 4810 into which male screw member 56 is screwed.

[0025] Next, the attachment and detachment of the backplate unit 58 to the first bracket 46 and the second bracket 48 will be described. As shown in FIG. 5(A), the backplate 32 of the backplate unit 58 faces upward, and as shown in FIG. 4, the end of the backplate unit 58 to which the first mounting member 40 is attached faces the first bracket 46 side. Then, the tip of the first pin 52 is inserted into the first pin insertion hole 4002 to roughly position the backplate unit 58, and the backplate unit 58 is moved toward the first bracket 46. At this time, the first pin insertion holes 4002 are smoothly guided by the first pins 52 along the movement direction of the backplate unit 58, so that the backplate unit 58 can be moved easily.

[0026] When the second pin groove 4004 eventually approaches the tip of the second pin 54, the backplate unit 58 is swung around the first pin 52 as a fulcrum, and the tip of the second pin 54 is aligned with the second pin groove 4004.Then, the backplate unit 58 is moved further toward the first bracket 46, and the second pin 54 is inserted into the second pin groove 4004. At this time, the first pin insertion hole 4002 is smoothly guided by the first pin 52 along the movement direction of the backplate unit 58, and the second pin groove 4004 is smoothly guided by the second pin 54 along the movement direction of the backplate unit 58, so that the backplate unit 58 can be moved more easily.

[0027] Eventually, as shown in Figure 5(B), one end of the backplate unit 58, in other words, one end of the plate support plate 36 and the reinforcing member 38, is abutted against the inner surface of the first bracket 46, the third mounting member 44 near the other end of the backplate unit 58 is abutted against the outer surface of the second bracket 48, and the male screw member 56 inserted into the third mounting member 44 is screwed into the screw hole 4810 of the second bracket 48. This completes the installation of the back plate 32. Since the first pin 52 and the second pin 54, which are of different lengths, are provided on the first bracket 46 located on the back side of the film transport path 14, this is advantageous in easily and reliably positioning the backplate unit 58 on the back side of the film transport path 14, even if there is only a narrow space on the back side of the underside of the film transport path 14. The backplate unit 58 can be removed by releasing the two male screw members 56 from the screw holes 4810 of the second bracket 48, then moving the backplate unit 58 away from the first bracket 46, and removing the first pin insertion hole 4002 and the second pin groove 4004 from the first pin 52 and the second pin 54.

[0028] Furthermore, the longer the lengths L1 and L2 of the first and second pins 52 and 54, the longer the range of movement of the backplate 32 that can be guided during the replacement work of the backplate 32 (backplate unit 58), which is advantageous in facilitating the replacement work of the backplate 32. However, if the lengths L1 and L2 of the first and second pins 52 and 54 are made too long, it becomes easier to accidentally apply force to the first and second pins 52 and 54 from the first pin insertion hole 4002 and the second pin groove 4004 when replacing the back plate 32, which may result in deformation of the first and second pins 52 and 54. Conversely, the shorter the lengths L1, L2 of the first and second pins 52, 54, the less likely it is that force will be accidentally applied to the first and second pins 52, 54 from the first pin insertion hole 4002 and the second pin groove 4004 when replacing the back plate 32, thereby preventing deformation of the first and second pins 52, 54. However, if the lengths L1 and L2 of the first and second pins 52 and 54 are made too short, the distance for guiding the movement range of the back plate 32 during the replacement work of the back plate 32 will be shortened, which will be disadvantageous in terms of performing the replacement work of the back plate 32 smoothly.

[0029] Furthermore, although the lengths L1 and L2 of the first and second pins 52 and 54 may be the same, if L1>L2 as in this embodiment, when attaching the backplate 32, first the first pin 52 is inserted into the first pin insertion hole 4002 to roughly position the backplate 32, and then the second pin 54 is inserted into the second pin groove 4004 to further position it, which makes it easy to position the backplate 32 and is advantageous in facilitating the attachment work of the backplate 32 to the backplate support mechanism 34. Furthermore, the second pin groove 4004 may be an insertion hole similar to the first pin insertion hole 4002, but in the case of the present embodiment, the second pin 54 can be more easily inserted into the second pin groove 4004 than when the second pin 54 is inserted into an insertion hole, which makes it easier to position the backplate 32 and is advantageous in facilitating the work of attaching the backplate 32 to the backplate support mechanism 34.

[0030] Next, the operation of the print inspection device 18 will be described. The film roll 22 is prepared according to the type of item to be packaged by the bag making, filling and packaging machine 10, and the printing unit 16 is set so that printing is performed on the packaging film 24 in a color (hereinafter also referred to as the printing color) that constitutes the print corresponding to the type of item and the color of the packaging film (packaging material color). Then, from the plurality of backplate units 58 having backplates 32 of different colors, a backplate unit 58 having a backplate 32 (resin sheet 37) of a color that enhances the contrast of the image captured by the imaging unit 28 is selected, and the backplate unit 58 is attached to the first and second brackets 46, 48 according to the procedure described above. Then, as the form-fill-seal machine 10 operates, the packaging film 24 is unwound from the raw film 22 and conveyed along the film conveying path 14 . After the printing unit 16 forms a print on the surface 24A of the packaging film 24, when the surface 24A of the packaging film 24 where the print is formed eventually reaches the imaging range of the imaging unit 28, an image is taken by the imaging unit 28. At this time, the illumination unit 26 irradiates the surface 24A of the packaging film 24 where the print is formed with light. Here, a back plate 32 having a color that emphasizes the contrast of the image is arranged on the back surface 24B side of the part of the packaging film 24 that is imaged by the imaging unit 28, so that the image captured by the imaging unit 28 has an emphasized contrast. Judgment unit 30 judges whether the printing is good or bad based on the image captured by imaging unit 28, and if the judgment result is good, the same operations are continued thereafter. On the other hand, if the judgment result is bad, the product on which the printing was not formed correctly is ejected as a defective product, or the operation of form-fill-seal machine 10 is stopped and an alarm is issued to the operator to inform them of the occurrence of poor printing, prompting them to take necessary measures such as adjusting printing unit 16 or repairing the malfunction. Furthermore, when the type of item to be packaged by the form-fill-seal packaging machine 10 is changed, changeover work is carried out, such as replacing the film roll 22 and changing the printing color setting of the printing unit 16. If it is necessary to change the backplate 32 in response to the change in printing color setting, the backplate 32 that had been supported by the backplate support mechanism 34 is removed and a backplate 32 that corresponds to the changed printing color is attached, after which the form-fill-seal packaging machine 10 is put into operation and the print inspection device 18 operates in the same manner as described above.

[0031] According to the print inspection device 18 of this embodiment, the film transport path 14 that transports the light-transmitting packaging film 24 is provided with an imaging unit 28 that captures an image of the print formed on the surface 24A of the packaging film 24 from the surface 24A of the packaging film 24 to generate an image, and a judging unit 30 that judges whether the print is good or bad based on the image, and a back plate 32 that presents a color that emphasizes the contrast of the image is provided on the back surface 24B side of the part of the packaging film 24 that is imaged by the imaging unit 28. Therefore, the contrast of the image captured by the imaging unit 28 is enhanced, and it is possible to ensure sufficient contrast between the print and the non-printed parts of the image generated by the imaging unit 28 without being affected by the hue, brightness, saturation, density, etc. of the print. Therefore, the judgment unit 30 is advantageous in accurately recognizing the printing by clearly reading the image of the printing, which is advantageous in accurately and efficiently judging whether the printing formed on the packaging film 24 is good or bad. Furthermore, in recent years, ultraviolet (UV) laser marker devices, which are often used as the printing unit 16, tend to print on the packaging film 24 with a somewhat low density, and it has been pointed out that if the contrast of the image captured by the imaging unit 28 is weak, it is difficult for the judgment unit 30 to clearly recognize the printing. According to this embodiment, the back plate 32 can be used to enhance the contrast of the image even for such thin and difficult to read print, which is advantageous for the judgment unit 30 to accurately recognize the print without being affected by the print density, and is advantageous for accurately and efficiently judging whether the print formed on the packaging film 24 is good or bad.

[0032] In addition, in this embodiment, an illumination unit 26 is provided that irradiates light onto the surface 24A of the packaging film 24 where the printing is formed, which is advantageous in ensuring the clarity of the image captured by the imaging unit 28 and is more advantageous in allowing the judging unit 30 to accurately and efficiently judge whether the printing formed on the packaging film 24 is good or bad.

[0033] Furthermore, in this embodiment, the color that emphasizes the contrast of the image is determined in accordance with the color that constitutes the print, so that when the printing unit 16 is capable of printing in multiple colors, the contrast of the image can be appropriately emphasized according to the color. This is more advantageous in enabling the determining unit 30 to accurately and efficiently determine whether the print formed on the packaging film 24 is good or bad.

[0034] In addition, in this embodiment, a plurality of back plates 32 of different colors are provided, and when the area on the surface 24A of the packaging film 24 on which the print is formed and imaged by the imaging unit 28 is set as the imaging area, a back plate support mechanism 34 is provided to position the back plate 32 on the back surface 24B of the packaging film 24 corresponding to the imaging area, and the back plate support mechanism 34 is arranged so that the plurality of back plates 32 can be replaced. Therefore, if a plurality of back plates 32 are prepared according to the colors printed by the printing unit 16, when the printing color is changed, the back plate 32 corresponding to the printing color can be selected and easily replaced, and the contrast of the image can be appropriately emphasized according to the printing color. This is more advantageous in enabling the determining unit 30 to accurately and efficiently determine whether the print formed on the packaging film 24 is good or bad. Furthermore, since the backplate support mechanism 34 supports only a single backplate 32, the space occupied by the backplate support mechanism 34 is kept to a minimum, which is advantageous in terms of making the print inspection device 18 more compact and space-saving.

[0035] (Second embodiment) Next, a second embodiment will be described with reference to FIGS. In the second embodiment, the backplate support mechanism 34 is different from that in the first embodiment. In the following description of the embodiment, the same parts and components as those in the first embodiment will be given the same symbols, and their description will be omitted or simplified, with the focus being on the differences from the first embodiment. The backplate support mechanism 34 is composed of a first bracket 46 provided on a frame on the back side of the film transport path 14 (see Figure 1), a second bracket 48 provided on a frame on the front side of the film transport path 14, and a backplate mounting plate 49 that is stretched across the first bracket 46 and the second bracket 48. The backplate attachment plate 49 is made of synthetic resin or metal, and in this embodiment is a metal plate material. The back plate attachment plate 49 has a cross section that is long horizontally in the transport direction of the packaging film 24, and has a flat upper surface provided with a plurality of screw holes (not shown) for detachably attaching the plate support plate 36. As in the first embodiment, the back plate 32 includes a plate support plate 36 and a resin sheet 37 having a color that enhances the contrast of the image obtained by the imaging unit 28. In FIG. 6, reference numeral 59 denotes a guide roller that guides packaging film 24 that has passed through imaging unit 28 and lighting unit 26 toward form-fill-seal packaging machine 10.

[0036] As shown in FIG. 7, the plate support plate 36 is made of synthetic resin or metal, and in this embodiment is made of sheet metal. The plate support plate 36 has a width approximately the same as that of the resin sheet 37 and a length slightly greater than that of the resin sheet 37, and is equipped with a support plate main body 3602 that supports the resin sheet 37 by superimposing it on its upper surface, and a pair of upright pieces 3604 that rise downward from both ends of the width direction of the support plate main body 3602 and extend over the entire longitudinal length of the support plate main body 3602. In this embodiment, a resin sheet 37 similar to that in the first embodiment is attached to the upper surface of a support plate main body 3602 with an adhesive. Screw insertion holes 3612 for attaching the plate support plate 36 to the back plate attachment plate 49 are provided in the upper surface of the support plate body 3602 exposed on both ends of the resin sheet 37 in the longitudinal direction. As shown in Figure 6, the backplate 32 is attached to the backplate mounting plate 49 by threading the screw N inserted into the screw insertion hole 3612 into the screw hole in the backplate mounting plate 49 and overlapping the plate support plate 36 on the upper surface of the backplate mounting plate 49. In addition to the same effects as those of the first embodiment, the second embodiment also provides the following effects. Since upright pieces 3604 are provided on both widthwise sides of the support plate body 3602 of the plate support plate 36, and the support plate body 3602 is overlapped on the backplate mounting plate 49, the strength and rigidity of the plate support plate 36 is ensured compared to the first embodiment, which is advantageous in increasing the durability of the plate support plate 36, i.e., the durability of the backplate 32.

[0037] (Third embodiment) Next, a third embodiment will be described with reference to FIGS. In the third embodiment, as shown in Figure 9(A), the back plate 60 is different from the first embodiment in that it is composed of a plate support plate 66 and a plurality of resin sheets 62 of different colors arranged on the upper surface of the plate support plate 66 in the direction in which the packaging film 24 is transported. In the third embodiment, a back plate support mechanism 64 supports a plurality of resin sheets 62 so that the resin sheets 62 can be adjusted and moved in the direction in which the packaging film 24 is conveyed.

[0038] In this embodiment, two resin sheets 62, a first resin sheet 62A and a second resin sheet 62B, are used. The first resin sheet 62A and the second resin sheet 62B have the same width in the conveying direction and the same length in the direction perpendicular to the conveying direction.

[0039] The plate support plate 66 is made of sheet metal and comprises a support plate body 6602 and a pair of standing pieces 6604 that stand downward from both ends in the width direction (the conveying direction of the film conveying path 14) perpendicular to the longitudinal direction of the plate support plate 66. As shown in FIG. 9(A), the first resin sheet 62A and the second resin sheet 62B are adhered to the upper surface of the support plate main body 6602 with an adhesive.

[0040] As shown in FIG. 8, the backplate support mechanism 64 includes a pair of rails 68, a pair of first brackets 70, a pair of second brackets 72, and a pair of third brackets 74. As shown in FIG. 8, rails 68 are attached to both ends of the lower surface of the support plate body 6602 in the longitudinal direction by screws N inserted through a pair of upright pieces 6604. In this way, a backplate unit 76 is formed by assembling the pair of rails 68 to the plate support plate 66 of the backplate 60 .

[0041] In FIG. 8, reference numerals 70, 72, and 74 respectively denote a pair of first brackets, a pair of second brackets, and a pair of third brackets. The pair of first brackets 70 are provided on a frame (not shown) of the film transport path 14 so as to face each other. A pair of second brackets 72 are attached to each of the first brackets 70 with screws N, respectively. A pair of third brackets 74 are attached to the second brackets 72 with screws N, respectively. The backplate unit 76 is disposed on the frame of the film transport path 14 via the first bracket 70, the second bracket 72, and the third bracket 74. The third bracket 74 has a long hole 7402 extending in the conveying direction, i.e., the width direction of the first resin sheet 62A and the second resin sheet 62B, and this long hole 7402 has a male threaded portion 7802 of a clamp lever 78 that can be screwed into the screw hole 6810 of the rail 68 inserted therein so as to be movable in the longitudinal direction of the long hole 7402.

[0042] Then, as shown in Figure 9(A), when the male threaded portion 7802 is positioned at one end of the elongated hole 7402 and the male threaded portion 7802 is screwed into the screw hole 6810 using the clamp lever 78, the first resin sheet 62A is positioned on the back surface 24B of the packaging film 24 in the imaging area. Also, as shown in Figure 10(A), when the male threaded portion 7802 is positioned at the other end of the elongated hole 7402 and the male threaded portion 7802 is screwed into the screw hole 6810 using the clamp lever 78, the second resin sheet 62B is positioned on the back surface 24B of the packaging film 24 in the imaging area. Therefore, the backplate support mechanism 64 supports the plate support plate 66 so that it can be moved and adjusted in the direction in which the packaging film 24 is transported, so that each of the multiple resin sheets 62 is selectively positioned on the back surface 24B of the packaging film 24 corresponding to the imaging area.

[0043] Next, the operation of the print inspection device 18 will be described with reference to FIG. Similar to the first embodiment, a roll of film 22 is prepared corresponding to the type of product, and the printing unit 16 is set to print on the packaging film 24 in a printing color corresponding to the type of product. Then, after loosening the pair of clamp levers 78, the backplate unit 76 is moved so that the resin sheet 62 of the first resin sheet 62A and the second resin sheet 62B, which has a color that emphasizes the contrast of the image captured by the imaging unit 28, is positioned on the back surface 24B of the packaging film 24 corresponding to the imaging area, and then the pair of clamp levers 78 are fastened. As form-fill-seal machine 10 operates, packaging film 24 is unwound from film roll 22 and conveyed along film conveying path 14, and when surface 24A of packaging film 24, where printing unit 16 has formed a print, reaches the imaging range of imaging unit 28, an image is captured by imaging unit 28. At this time, illumination unit 26 irradiates surface 24A of packaging film 24, where printing has formed a print, with light. Here, the first resin sheet 62A or the second resin sheet 62B, which has a color that emphasizes the contrast of the image, is arranged on the back surface 24B side of the portion of the packaging film 24 that is imaged by the imaging unit 28, so the image captured by the imaging unit 28 has emphasized contrast. Hereinafter, as in the first embodiment, the judgment unit 30 judges whether the printing is good or bad based on the image captured by the imaging unit 28, and if the judgment result is good, the same operation continues thereafter, but if the judgment result is bad, the item on which the printing was not formed correctly is ejected as a defective product, or the operation of the form-fill-seal packaging machine 10 is stopped and an alarm is issued to the operator to inform them of the occurrence of poor printing, prompting them to take necessary measures such as adjusting the printing unit 16 or repairing the malfunction. Furthermore, when the type of item to be packaged is switched using the bag making, filling and packaging machine 10, if it is necessary to change the backplate 60 in response to a change in the print color setting, the backplate unit 76 is moved and its position is fixed with the clamp lever 78 so that the first resin sheet 62A or the second resin sheet 62B corresponding to the changed print color is positioned on the back surface 24B side of the part of the packaging film 24 that is imaged by the imaging unit 28, and then the print inspection device 18 is operated in the same manner as described above.

[0044] According to the third embodiment, not only are the same effects as those of the first embodiment achieved, but also the following effects are achieved. That is, according to the third embodiment, the backplate 60 is configured to include a plate support plate 66 and first and second resin sheets 62A, 62B of different colors that are arranged on the upper surface of the plate support plate 66 in the direction in which the packaging film is transported, and a backplate support mechanism 64 is provided that supports the plate support plate 66 in an adjustable manner so that each of the first and second resin sheets 62A, 62B is selectively positioned on the back surface 24B of the packaging film 24 corresponding to the imaging area. Therefore, if first and second resin sheets 62A, 62B of different colors are arranged on the plate support board 66 according to the color printed by the printing unit 16, when the printing color is changed, it is only necessary to select and move the resin sheet 62 corresponding to the printing color, and the contrast of the image can be appropriately emphasized according to the printing color. This is advantageous in enabling the determining unit 30 to accurately and efficiently determine whether the print is good or bad. Furthermore, since it is sufficient to perform an extremely simple operation such as adjusting the position of the back plate 60 in accordance with the color to be printed by the printing unit 16, this is also advantageous in terms of improving work efficiency.

[0045] In the third embodiment, the case where two resin sheets 62 are used has been described, but it is also possible to use three or more resin sheets 62 of different colors. Furthermore, the colors of the plurality of resin sheets 62 may be any colors that enhance the contrast of the image, and are not limited to white or black, as in the first embodiment. Also, as in the first embodiment, if the colors that make up the print are a first color and a second color that are different from each other, it is sufficient to experimentally determine a single color that enhances the contrast of the image for both the first color and the second color. Furthermore, in the third embodiment, the case where the backplate 60 is composed of a single plate support plate 66 and multiple resin sheets 62 has been described, but the backplate may also be composed by providing independent plate support plates corresponding to each of the multiple resin sheets 62 and connecting these multiple plate support plates together with stays or the like. In this way, the combination of multiple resin sheets that make up the backplate can be flexibly changed, which is advantageous in improving the usability of the print inspection device 18. [Explanation of symbols]

[0046] 10 Bag making, filling and packaging machine 12 Fabric support part 14 Film transport path 16 Printing section 18 Print inspection equipment 20 Bag making and filling section 22 Film roll 24 Packaging film 24A surface 24B Back 26 Lighting Department 28 Imaging unit 30 Judgment section 32 Backplate 34 Backplate support mechanism 36 Plate support plate 3602 Support plate body 3604 Standing piece 3610 Screw insertion hole 3612 Screw insertion hole 37 Resin sheet 38 Reinforcement member 3810 Screw insertion hole 3812 screw hole 40 First mounting member 4002 First pin insertion hole 4004 Second pin insertion groove 42 Second mounting member 4210 screw hole 4212 screw hole 4214 screw hole 44 Third mounting member 4410 Screw insertion hole 4412 Screw insertion hole 46 First Bracket 48 Second Bracket 4810 screw hole 49 Backplate mounting plate 50 Pin mounting part 52 First pin 5202 Tapered section 54 2nd pin 5402 Tapered section 56 Male threaded member 58 Backplate Unit 59 Guide roller 60 Backplate 62 Resin sheet 62A First resin sheet 62B Second resin sheet 64 Backplate support mechanism 66 Plate support plate 6602 Support plate body 6604 Standing piece 68 Rail 6810 screw hole 70 First Bracket 72 Second Bracket 74 Third Bracket 7402 Long hole 76 Backplate unit 78 Clamp lever 7802 Male thread N screw N1 First screw N2 Second screw N3 screw N4 Grub Screw

Claims

1. an imaging unit that captures an image of a print formed on a surface of a packaging film from the surface of the packaging film in a film transport path that transports a light-transmitting packaging film; a determination unit that determines whether the printing is good or bad based on an image, a back plate having a color that enhances the contrast of the image is provided on the back side of the packaging film where the image is captured by the imaging unit; A print inspection device characterized by:

2. An illumination unit that irradiates light onto the surface of the packaging film where the printing is formed, 2. The print inspection device according to claim 1.

3. The color that enhances the contrast of the image is determined in accordance with the color that constitutes the print.

2. The print inspection device according to claim 1.

4. When the colors constituting the print are a first color and a second color that are different from each other, the color that enhances the contrast of the image is a single color that enhances the contrast of the image with respect to both the first color and the second color; 4. The print inspection device according to claim 3.

5. a plurality of back plates each having a different color are provided; a backplate support mechanism is provided for positioning the backplate on a back surface of the packaging film corresponding to an imaging area where the printing is formed and is imaged by the imaging unit; The backplate support mechanism is provided so that the plurality of backplates can be replaced.

2. The print inspection device according to claim 1.

6. the back plate includes a plate support plate and a colored resin sheet attached to an upper surface of the plate support plate; the backplate support mechanism includes a first bracket provided on a frame on the rear side of the film transport path, a second bracket provided on a frame on the front side of the film transport path, a first attachment member provided on the lower surface of the plate support plate at an end on the rear side of the film transport path, and a second attachment member provided on the lower surface of the plate support plate at an end on the front side of the film transport path, The first bracket is provided with first pins extending to a middle portion of the back plate in a longitudinal direction at intervals in a width direction of the back plate on a lower surface of the plate support plate, and second pins having a length to be inserted into the first mounting member, the first mounting member is provided with a first pin insertion hole through which the first pin can be inserted, and a second pin groove through which the second pin can be inserted, the second pin groove having an open end on a side away from the first pin insertion hole, the first pin is inserted into the first pin insertion hole, the second pin is inserted into the second pin groove, and the second bracket and the second mounting member are attached, whereby the back plate is disposed on the frame on the front side and the frame on the rear side of the film transport path.

6. The print inspection device according to claim 5.

7. the back plate includes the plate support plate and a colored resin sheet attached to an upper surface of the plate support plate, The backplate support mechanism is configured to include a first bracket provided on a frame on the back side of the film transport path, a second bracket provided on a frame on the front side of the film transport path, and a backplate mounting plate that spans between the first bracket and the second bracket, has a cross section that is horizontally elongated in the transport direction of the packaging film, and has an upper surface on which the plate support plate is detachably attached.

2. The print inspection device according to claim 1.

8. the back plate includes a plate support plate and a plurality of resin sheets having different colors arranged on an upper surface of the plate support plate in a direction in which the packaging film is transported, a back plate support mechanism that supports the plate support plate in a movable and adjustable manner in a direction in which the packaging film is transported, so that each of the plurality of resin sheets is selectively positioned on the back surface of the packaging film corresponding to the imaging area when the area on the surface of the packaging film on which the printing is formed and that is imaged by the imaging unit is defined as an imaging area; 2. The print inspection device according to claim 1.

Images