Sheet bundle package

Abstract

To provide a sheet bundle packing body capable of suppressing erroneous reading and writing.SOLUTION: A sheet bundle packing body includes a sheet bundle, a conductive sheet, and a packing material. The sheet bundle is a laminate of sheets having a printable surface and a wireless tag. The conductive sheet is disposed at an end of the sheet bundle in a stacking direction of the sheet. In the conductive sheet, an area overlapping with the wireless tag when viewed from the stacking direction has conductivity. The packing material packs the sheet bundle.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] FIELD An embodiment of the present invention relates to a sheet bundle package. [Background technology]

[0002] Image forming devices that form images on sheets are in use. Some sheets are equipped with wireless tags from which information can be read and written. However, there are cases where information is mistakenly read or written on sheets that are not intended for reading or writing. There is a demand for a sheet bundle package that can prevent erroneous reading and writing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-313551 Summary of the Invention [Problem to be solved by the invention]

[0004] The problem to be solved by the present invention is to provide a sheet bundle package that can prevent erroneous reading and writing. [Means for solving the problem]

[0005] The sheet bundle package of the embodiment includes a sheet bundle, a conductive sheet, and packaging material. The sheet bundle is formed by stacking sheets each having a printable surface and a wireless tag. The conductive sheet is disposed at an end of the sheet bundle in the stacking direction of the sheets. The conductive sheet has conductivity in an area that overlaps with the wireless tag when viewed from the stacking direction. The packaging material packages the sheet bundle. The conductive sheet is part of the packaging material, and the packaging material has a cut in part of the periphery of the conductive sheet. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 1 is an explanatory diagram showing an example of the configuration of an image forming apparatus. [Figure 2] FIG. 1 is a diagram illustrating a hardware configuration of an image forming apparatus. [Figure 3] FIG. 2 is a development view of the sheet bundle package according to the embodiment. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 10 is a perspective view of a conductive sheet according to a first modified example. [Figure 8] FIG. 10 is a perspective view of a conductive sheet according to a second modified example. [Figure 9] FIG. 10 is a perspective view of a conductive sheet according to a third modified example. [Figure 10] FIG. 10 is a perspective view of a packaging material according to a fourth modified example. DETAILED DESCRIPTION OF THE INVENTION

[0007] Hereinafter, a sheet bundle package according to an embodiment will be described with reference to the drawings. First, the configuration of an image forming apparatus 10 according to an embodiment will be described with reference to Fig. 1. Fig. 1 is an explanatory diagram showing an example of the configuration of the image forming apparatus 10.

[0008] 1, the image forming apparatus 10 has a control panel 13, a wireless tag communication device 90, and a printer unit 18. The printer unit 18 includes a control unit 100, paper feed cassettes 16a and 16b, etc. The control unit 100 controls the control panel 13, the wireless tag communication device 90, and the printer unit 18. The control unit 100 controls the conveyance of sheets in the printer unit 18. Controlling the conveyance of sheets means controlling the timing of conveying the sheets, the stopping position of the sheets, the conveyance speed of the sheets, etc.

[0009] The control panel 13 includes input keys and a display unit. For example, the input keys accept input from the user. For example, the display unit is a touch panel type. The display unit accepts input from the user and displays it to the user. For example, the control panel 13 displays configurable items related to the operation of the image forming apparatus 10 on the display unit. The control panel 13 notifies the control unit 100 of the items set by the user.

[0010] The paper feed cassettes 16a and 16b store sheets equipped with wireless tags. Of course, the paper feed cassettes 16a and 16b can also store sheets without wireless tags. In the following description, unless otherwise specified, the sheets are assumed to be sheets equipped with wireless tags. The sheets are made of a material such as paper or plastic film.

[0011] Printer unit 18 performs an operation of forming an image. For example, printer unit 18 forms an image indicated by image data on a sheet. In the following description, forming an image on a sheet is also referred to as "printing." Note that, in this embodiment, printer unit 18 is a device that fixes a toner image, but is not limited to this and may be an inkjet device.

[0012] The printer unit 18 includes an intermediate transfer belt 21. The printer unit 18 supports the intermediate transfer belt 21 with a driven roller 41, a backup roller 40, and the like. The printer unit 18 rotates the intermediate transfer belt 21 in the direction of arrow m. The printer unit 18 includes four sets of image forming stations 22Y, 22M, 22C, and 22K. The image forming stations 22Y, 22M, 22C, and 22K correspond to Y (yellow), M (magenta), C (cyan), and K (black), respectively. The image forming stations 22Y, 22M, 22C, and 22K are arranged below the intermediate transfer belt 21 in the direction of rotation of the intermediate transfer belt 21.

[0013] The following description will be given taking the Y (yellow) image forming station 22Y as an example among the image forming stations 22Y, 22M, 22C, and 22K. Note that the image forming stations 22M, 22C, and 22K have the same configuration as the image forming station 22Y, and therefore detailed description thereof will be omitted.

[0014] The image forming station 22Y includes a charger 26, an exposure scanning head 27, a developing device 28, and a photosensitive drum cleaner 29. The charger 26, the exposure scanning head 27, the developing device 28, and the photosensitive drum cleaner 29 are arranged around the photosensitive drum 24 that rotates in the direction of arrow n.

[0015] The image forming station 22Y includes a primary transfer roller 30. The primary transfer roller 30 is disposed opposite the photosensitive drum 24 with the intermediate transfer belt 21 interposed therebetween.

[0016] The charging charger 26 uniformly charges the photosensitive drum 24. The exposure scanning head 27 exposes the uniformly charged photosensitive drum 24 to light, forming an electrostatic latent image on the photosensitive drum 24. The developing device 28 develops the electrostatic latent image on the photosensitive drum 24 using a two-component developer made of toner and carrier.

[0017] The primary transfer rollers 30 primarily transfer the toner images formed on the photosensitive drums 24 onto the intermediate transfer belt 21. The primary transfer rollers 30 of the image forming stations 22Y, 22M, 22C, and 22K primarily transfer the toner images onto the intermediate transfer belt 21, thereby forming a color toner image on the intermediate transfer belt 21. The color toner image is a toner image formed by sequentially superimposing toner images of Y (yellow), M (magenta), C (cyan), and K (black). The photosensitive cleaner 29 removes any toner remaining on the photosensitive drums 24 after the primary transfer.

[0018] The printer unit 18 includes a secondary transfer roller 32. The secondary transfer roller 32 is disposed opposite the backup roller 40 across the intermediate transfer belt 21. The secondary transfer roller 32 performs secondary transfer of the color toner images on the intermediate transfer belt 21 onto the sheet all at once. In the following description, the term "toner image" may refer to either a color toner image or a toner image of only one color. The toner image may also be a toner image using a decolorizable toner.

[0019] The conveying path 33 is a path along which a sheet is conveyed by a plurality of conveying rollers (for example, conveying roller 330, etc.). The conveying path 33 includes a first conveying path 33a, a second conveying path 33b, and a third conveying path 33c. The first conveying path 33a is a conveying path from the junction 44a to the branching portion 44b. The second conveying path 33b is a conveying path that passes through the inside of the double-sided printing device 38, and is a conveying path that is different from the first conveying path 33a, from the branching portion 44b to the junction 44a. The third conveying path 33c is a conveying path from the branching portion 44b to the paper output tray 20.

[0020] A sheet is taken out from the sheet loading section 16, which is either the paper feed cassette 16a, the paper feed cassette 16b, or the manual feed tray 16c. The sheet taken out from the sheet loading section 16 is temporarily stopped at the point where the two stopped registration rollers 31 are in contact. At this time, the leading edge of the sheet abuts against the registration rollers 31, and the inclination of the sheet is corrected. The control section 100 starts the rotation of the registration rollers 31 in accordance with the position of the toner image on the rotating intermediate transfer belt 21, and moves the sheet to the position of the secondary transfer roller 32.

[0021] The toner image formed on the intermediate transfer belt 21 is secondarily transferred onto a sheet by a secondary transfer roller 32. Furthermore, the secondarily transferred toner image is fixed onto the sheet by a fixing device 34. In this way, an image is formed on the sheet under the control of the control unit 100. The control unit 100 conveys the sheet on which the toner image has been fixed by the fixing device 34 to the third conveying path 33c, and discharges the sheet.

[0022] The wireless tag communication device 90 includes a computing device, a storage device, and an antenna, all of which are not shown. The wireless tag in this embodiment is, for example, an RFID (Radio Frequency Identifier) ​​tag. The wireless tag communication device 90 transmits radio waves, for example, in the direction of arrow k. The wireless tag communication device 90 communicates with a wireless tag attached to a sheet via the antenna. Specifically, the wireless tag communication device 90 reads information from the wireless tag and writes information to the wireless tag.

[0023] For example, if the sheet is used for logistics or the like, the information to be written on the wireless tag includes information indicating the contents, information indicating the destination, and information to be printed on the sheet. In this embodiment, the wireless tag communication device 90 uses, for example, a radio wave method (UHF) in the 900 MHz band. However, the RFID method and frequency band are not limited to this, and other methods and frequency bands can also be adopted.

[0024] The control unit 100 controls each unit of the image forming apparatus 10 . 2 is a hardware configuration diagram of an image processing device. Image forming device 10 includes a CPU (Central Processing Unit) 91, memory 92, auxiliary storage device 93, etc., all connected via a bus, and executes a program. By executing the program, image forming device 10 functions as a device including printer unit 18, control panel 13, and wireless tag communication device 90.

[0025] The CPU 91 functions as a control unit 100 by executing programs stored in the memory 92 and the auxiliary storage device 93. The control unit 100 controls the operation of each functional unit of the image forming apparatus . The auxiliary storage device 93 is configured using a storage device such as a magnetic hard disk device, a semiconductor storage device, etc. The auxiliary storage device 93 stores information.

[0026] A sheet bundle package according to an embodiment will be described. 3 is a development view of a sheet-bundle package 70 according to an embodiment of the present invention. The sheet-bundle package 70 includes a sheet bundle 59, a conductive sheet 60, and a packaging material 71.

[0027] In this application, the Z direction, X direction, and Y direction of the Cartesian coordinate system are defined as follows: The Z direction is the stacking direction of the sheets 50 in the sheet stack 59. The -Z direction is the direction in which the conductive sheet 60 is arranged as viewed from the sheet stack 59. For example, the Z direction is the vertical direction, and the -Z direction is the downward direction. The X direction is the longitudinal direction of the sheet 50, and the Y direction is the lateral direction of the sheet 50. For example, the X direction and the Y direction are horizontal directions.

[0028] 4 is a perspective view of a sheet stack. The sheet stack 59 has a plurality of sheets 50 stacked in the Z direction. The sheets 50 are made of paper, resin material, or the like. The sheets 50 have a printable surface 51 and a wireless tag 57.

[0029] The printable surface 51 is the entire surface of the sheet 50. The printable surface 51 may be a part of the surface of the sheet 50. For example, the printable surface 51 of the sheet 50 is white. The wireless tag 57 is embedded inside the sheet 50 in the Z direction. The wireless tag 57 may be attached to the surface of the sheet 50. The size of the wireless tag 57 is smaller than that of the sheet 50 in the X and Y directions. When viewed from the Z direction, the wireless tag 57 is disposed in a portion of the sheet 50. For example, the wireless tag 57 is an RFID (Radio Frequency Identifier) ​​tag.

[0030] The conductive sheet 60 is disposed at the end of the sheet stack 59 in the -Z direction. The size of the conductive sheet 60 in the X and Y directions is the same as that of the sheet 50. The size of the conductive sheet 60 may be smaller than that of the sheet 50. The thickness of the conductive sheet 60 in the Z direction may be the same as or different from that of the sheet 50. Details of the conductive sheet 60 will be described later.

[0031] The packaging material 71 is made of paper, a resin material, etc. The packaging material 71 packages the sheet stack 59. 5 is a perspective view of a sheet bundle package 70. The sheet bundle package 70 is a sheet bundle 59 entirely covered with a packaging material 71.

[0032] As shown in FIG. 3, the packaging material 71 of the sheet bundle package 70 is unfolded, and the sheet bundle 59 is removed. The sheet bundle 59 is removed with the conductive sheet 60 positioned at the end in the -Z direction. The removed sheet bundle 59 is set on the sheet loading unit 16 of the image forming apparatus 10 shown in FIG. 1. The sheet bundle 59 is set with the conductive sheet 60 positioned downward. A document guiding the direction in which the conductive sheet 60 should be set may be enclosed inside the packaging material 71.

[0033] The conductive sheet 60 will now be described in detail. FIG. 6 is a perspective view of a conductive sheet 60. The base material of the conductive sheet 60 is formed of paper, a resin material, or the like. The conductive sheet 60 has a conductive region 67 formed of a conductive material. For example, the conductive material is a metal material such as aluminum. When viewed from the Z direction, the conductive region 67 overlaps with the wireless tag 57 of the sheet 50. In the example of FIG. 6, the entire surface of the conductive sheet 60 in the -Z direction is the conductive region 67. For example, the conductive region 67 is formed by aluminum vapor deposition on the base material of the conductive sheet 60. The base material of the conductive sheet 60 may be formed of a conductive material.

[0034] The sheet that is the target of reading and writing by the RFID tag communication device 90 in FIG. 1 is a sheet moving on the conveying path 33. The sheet 50 set on the sheet placing section 16 is not the target of reading and writing by the RFID tag communication device 90. When multiple sheets 50 are present on the sheet placing section 16, the RFID tags 57 of each sheet 50 overlap in the Z direction. The impedance of the antenna of the RFID tag 57 decreases, causing a loss of matching with the chip, making communication between the RFID tag 57 and the RFID tag communication device 90 difficult. This prevents erroneous reading and writing from and to the multiple sheets 50 placed on the sheet placing section 16.

[0035] When the sheet 50 on the sheet placement unit 16 is consumed for printing and only one sheet 50 remains, the wireless tags 57 do not overlap in the Z direction. It is necessary to prevent erroneous reading and writing from and to this sheet 50. The conductive sheet 60 in Fig. 6 is placed below the sheet stack 59. The conductive sheet 60 is present below the remaining sheet 50. When viewed from the Z direction, the conductive area 67 of the conductive sheet 60 overlaps with the wireless tag 57 of the sheet 50. The impedance of the antenna of the wireless tag 57 decreases, making it difficult for the wireless tag 57 to communicate with the wireless tag communication device 90. Therefore, erroneous reading and writing of the remaining sheet 50 on the sheet loading section 16 is suppressed.

[0036] The entire surface of the conductive sheet 60 in the -Z direction is the conductive area 67. The sheet 50 set on the sheet loading section 16 in FIG. 1 is transported in the +X direction. The wireless tag 57 and the conductive area 67 continue to overlap until the wireless tag 57 reaches the end of the conductive sheet 60 in the +X direction. This prevents erroneous reading and writing to the sheet 50.

[0037] The sheet placement section 16 in FIG. 1 has a sheet detection device 17 that detects the presence or absence of a sheet 50. For example, the sheet detection device 17 is an optical sensor. The optical sensor irradiates light onto a detection position on the sheet 50 and receives reflected light. The detection position is part of the printable surface 51 of the sheet 50. If the printable surface 51 of the sheet 50 is a light color such as white, the light reflectance is high and the reflected light is strong. If the sheet 50 is not present, the reflected light is weak. The optical sensor detects the presence or absence of the sheet 50 based on the strength of the reflected light.

[0038] The conductive sheet 60 in FIG. 6 has a light reflectance adjustment region 61 with a different light reflectance than the printable surface 51 of the sheet 50. For example, if the printable surface 51 is a light color such as white, the light reflectance adjustment region 61 is a dark color such as black. In this case, the light reflectance of the light reflectance adjustment region 61 is lower than that of the printable surface 51. Conversely, if the printable surface 51 is a dark color, the light reflectance adjustment region 61 is a light color. In this case, the light reflectance of the light reflectance adjustment region 61 is higher than that of the printable surface 51. The light reflectance adjustment region 61 may be formed of a material with a different light reflectance than that of the printable surface 51. When viewed from the Z direction, the light reflectance adjustment region 61 overlaps with the detection position of the sheet 50 by the optical sensor. In the example of FIG. 6, the entire surface of the conductive sheet 60 in the +Z direction is the light reflectance adjustment region 61.

[0039] 1, when no sheet 50 is present on the sheet placement section 16, the optical sensor irradiates light onto the light reflectance adjusting region 61 of the conductive sheet 60. The intensity of the light reflected from the light reflectance adjusting region 61 differs from the intensity of the light reflected from the printable surface 51. This allows the absence of the sheet 50 to be detected.

[0040] When the absence of sheet 50 is detected, control unit 100 in FIG. 1 displays a message to that effect on control panel 13. Control unit 100 stops the print job. Conductive sheet 60 remains on sheet loading unit 16. The user of image forming apparatus 10 removes conductive sheet 60 from sheet loading unit 16 and discards it. A message indicating that conductive sheet 60 should be discarded may be displayed on the surface of conductive sheet 60 in the +Z direction. The user places a new stack of sheets 59 and conductive sheet 60 on sheet loading unit 16 and resumes the print job. The removed old conductive sheet 60 may be reused. The user may place the new stack of sheets 59 and conductive sheet 60 on top of the conductive sheet 60 remaining on sheet loading unit 16.

[0041] As described above in detail, the sheet bundle package 70 of this embodiment includes a sheet bundle 59, a conductive sheet 60, and a packaging material 71. The sheet bundle 59 is formed by stacking sheets 50 each having a printable surface 51 and a wireless tag 57. The conductive sheet 60 is disposed at an end of the sheet bundle 59 in the Z direction. The conductive sheet 60 has a conductive region 67 that overlaps with the wireless tag 57 when viewed from the Z direction. The packaging material 71 packages the sheet bundle 59.

[0042] The conductive sheet 60 is present in the -Z direction of the sheet stack 59. When viewed from the Z direction, the conductive area 67 of the conductive sheet 60 overlaps with the wireless tag 57 of the sheet 50. This makes it difficult for the wireless tag 57 to communicate with the wireless tag communication device 90. This prevents erroneous reading and writing of the sheet 50.

[0043] The conductive sheet 60 has a light reflectance adjusting region 61. When viewed from the Z direction, the light reflectance adjusting region 61 overlaps with the detection position of the sheet 50 by the optical sensor. The light reflectance of the light reflectance adjusting region 61 is different from that of the printable surface 51.

[0044] When sheet 50 is not present, the optical sensor shines light onto light reflectance adjusting region 61 of conductive sheet 60. The intensity of the light reflected from light reflectance adjusting region 61 differs from the intensity of the light reflected from printable surface 51. This allows the absence of sheet 50 to be detected.

[0045] 6, the entire surface of the conductive sheet 60 in the −Z direction is the conductive region 67, and the entire surface in the +Z direction is the light reflectance adjusting region 61. Alternatively, the entire surface in the +Z direction may be both the conductive region 67 and the light reflectance adjusting region 61.

[0046] The conductive sheet of the first modified example will be described. 7 is a perspective view of a conductive sheet according to the first modified example. Description of the first modified example that is the same as the embodiment described above may be omitted.

[0047] The conductive sheet 60 of the first modified example has a conductive area 68. When viewed from the Z direction, the conductive area 68 overlaps with the wireless tag 57 of the sheet 50. In the first modified example, only a portion of the surface of the conductive sheet 60 in the -Z direction is the conductive area 68. Only a portion of the surface of the conductive sheet 60 in the +Z direction may be the conductive area 68. As with the embodiment, the conductive sheet 60 of the first modified example also prevents erroneous reading and writing from and to the sheet 50 set on the sheet loading section 16.

[0048] The conductive sheet 60 of the first modified example has a light reflectance adjusting region 62. When viewed from the Z direction, the light reflectance adjusting region 62 overlaps with the sheet detection position by the optical sensor. In the first modified example, only a portion of the surface of the conductive sheet 60 in the +Z direction is the light reflectance adjusting region 62. As with the embodiment, the conductive sheet 60 of the first modified example also detects the absence of a sheet 50 on the sheet loading section 16.

[0049] The conductive sheet of the second modified example will be described. 8 is a perspective view of a conductive sheet according to the second modified example. Description of the second modified example that is the same as the embodiment described above may be omitted.

[0050] The sheet placement section 16 in FIG. 1 has a sheet detection device 17 that detects the presence or absence of a sheet 50. For example, the sheet detection device 17 is a physical switch. The physical switch comes into contact with the detection position of the sheet 50. When the sheet 50 is present on the sheet placement section 16, the physical switch stops on the surface of the sheet 50. When the sheet 50 is not present, the physical switch moves significantly in the -Z direction. The physical switch detects the presence or absence of the sheet 50 based on the amount of movement in the Z direction.

[0051] 8 has a first hole 63 used to detect the absence of the sheet 50. The first hole 63 penetrates the conductive sheet 60 in the Z direction. When viewed from the Z direction, the first hole 63 overlaps with the position where the physical switch detects the sheet 50. When the sheet 50 is not present on the sheet placement portion 16, the physical switch moves significantly in the −Z direction through the first hole 63 of the conductive sheet 60. This allows the absence of the sheet 50 on the sheet placement portion 16 to be detected.

[0052] The detection position of the sheet 50 by the physical switch may be set at a position away from the center point of the sheet in the X and Y directions. In some cases, the conductive sheet 60 may be set in the opposite direction in the X and Y directions relative to the sheet loading section 16 in Fig. 1. In this case, the detection position of the sheet 50 and the position of the first hole 63 of the conductive sheet 60 do not overlap when viewed from the Z direction.

[0053] The conductive sheet 60 of the second modification has a second hole 64. The first hole 63 and the second hole 64 are positioned symmetrically with respect to the center point of the conductive sheet 60 in the X and Y directions. When the conductive sheet 60 is set in the opposite direction in the X and Y directions, the physical switch moves significantly in the -Z direction through the second hole 64. This allows the absence of the sheet 50 on the sheet placement section 16 to be detected.

[0054] The conductive sheet 60 of the second modified example has a first hole 63 at a position where the sheet 50 is detected by a physical switch. Alternatively, the first hole 63 may be at a position where the sheet is detected by an optical sensor. When the sheet 50 is not present on the conductive sheet 60, the optical sensor irradiates light onto the first hole 63 of the conductive sheet 60. The sheet placing section 16 below the conductive sheet 60 reflects the light. The reflected light from the sheet placing section 16 is weaker than the reflected light from the printable surface 51 of the sheet 50. This allows the absence of the sheet 50 on the sheet placing section 16 to be detected.

[0055] The conductive sheet of the third modified example will be described. 9 is a perspective view of a conductive sheet according to the third modified example. Description of the third modified example that is the same as the above-described embodiment may be omitted.

[0056] The detection position of the sheet 50 by the physical switch may differ depending on the manufacturer of the image forming apparatus 10. In some cases, the first hole 63 of the conductive sheet 60 is positioned to correspond to the detection position of the sheet 50 in the image forming apparatus 10 of a first company. When this conductive sheet 60 is set in the sheet loading section 16 of the image forming apparatus 10 of a second company, the physical switch stops on the surface of the conductive sheet 60. In this case, it is not possible to detect the absence of the sheet 50 in the sheet loading section 16.

[0057] The conductive sheet 60 of the third modified example has a third hole 65. The third hole 65 is arranged corresponding to the detection position of the sheet 50 in the image forming apparatus 10 of the second company. When this conductive sheet 60 is set on the sheet loading section 16 of the image forming apparatus 10 of the second company, the physical switch moves significantly in the -Z direction through the third hole 65. The absence of the sheet 50 on the sheet loading section 16 is detected not only in the image forming apparatus 10 of the first company but also in the image forming apparatus 10 of the second company.

[0058] The conductive sheet of the fourth modification will be described. 10 is a perspective view of a packaging material of the fourth modified example. Description of the fourth modified example that is the same as the above-described embodiment may be omitted.

[0059] The conductive sheet 76 of the fourth modified example is part of the packaging material 71. The conductive sheet 76 is formed in an area of ​​the packaging material 71 that contacts the surface of the sheet stack 59 in the -Z direction. For example, the conductive sheet 76 is similar to the conductive sheet 60 of the embodiment shown in FIG. 6. The entire surface of the conductive sheet 76 in the -Z direction is a conductive area, and the entire surface in the +Z direction is a light reflectance adjusting area. The conductive area and the light reflectance adjusting area may be formed over the entire packaging material 71.

[0060] Because the conductive sheet 76 is part of the packaging material 71, there is no need to prepare a conductive sheet separately from the packaging material 71. Even if sheets 50 of various sizes are available, there is no need to prepare a conductive sheet according to the size of the sheet 50. Therefore, the cost of the sheet bundle package 70 is reduced.

[0061] Packaging material 71 has a cut 77 in part of the periphery of conductive sheet 76. Conductive sheet 76 is separated from packaging material 71 in the area where cut 77 is formed and is connected to packaging material 71 in the area where cut 77 is not formed. When a user separates the area where cut 77 is not formed, conductive sheet 76 is completely separated from packaging material 71. Sheet stack 59 and conductive sheet 76 are removed from packaging material 71 in an overlapping state. Having cut 77 in part of the periphery of conductive sheet 76 makes it easy to remove conductive sheet 76.

[0062] According to at least one of the embodiments described above, the conductive sheet 60 is provided at the end in the −Z direction of the sheet stack 59. This makes it possible to prevent erroneous reading and writing of the sheets 50.

[0063] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, as well as within the scope of the invention described in the claims and their equivalents. [Explanation of symbols]

[0064] Z...stacking direction, 17...sheet detection means (optical sensor), 50...sheet, 51...printable surface, 57...wireless tag, 59...sheet stack, 60...conductive sheet, 61, 62...light reflectance adjustment area, 63...first hole (hole), 64...second hole (hole), 65...third hole (hole), 67...conductive area, 70...sheet stack package, 71...packaging material, 76...conductive sheet, 77...notch.

Claims

1. a sheet stack in which sheets each having a printable surface and a wireless tag are stacked; a conductive sheet that is disposed at an end of the sheet stack in the stacking direction of the sheets, and has a conductive area that overlaps with the wireless tag when viewed from the stacking direction; a packaging material for packaging the sheet bundle, the conductive sheet is a part of the packaging material, The packaging material has a notch in a part of the periphery of the conductive sheet. Sheet bundle package.

2. A stack of sheets stacked together, each sheet having a printable surface and a wireless tag; a conductive sheet that is disposed at an end of the sheet stack in the stacking direction of the sheets, and has a conductive area that overlaps with the wireless tag when viewed from the stacking direction; and a non-conductive packaging material for packaging the sheet bundle together with the conductive sheet. Sheet bundle package.

3. the conductive sheet has holes that are used to detect the absence of the sheet; The sheet bundle package according to claim 1 or 2.

4. the conductive sheet has a light reflectance different from that of the printable surface in a region that overlaps with a detection position of the sheet by an optical sensor when viewed from the stacking direction; The sheet bundle package according to claim 1 or 2.

Images