JP4956959B2 - Thermal copy sheet and thermal copy printer - Google Patents

Description

  The present invention relates to a thermal copying sheet in which a plurality of thermal papers are detachably overlapped, and a thermal copying printer that applies heat to the thermal copying sheet for printing.

  Conventionally, in a thermal printer, printing is performed by pressing a heated print head against special paper (thermal paper) that changes color when heat is applied. In this thermal printer, it is known that when a thermal copy sheet in which a plurality of thermal papers are detachably overlapped is printed, the same image is simultaneously printed on the thermal papers. For example, it is common to use one sheet of thermal paper for storage and one sheet of thermal paper for submission among printed thermal copy sheets.

Furthermore, when printing on two sheets of thermal paper, it is possible to print only the first sheet and print both the first sheet and the second sheet without regard to the area. A thermal paper printer is known (for example, see Patent Document 1). This is because when printing is performed only on the first first thermal paper, printing is performed with the first energy amount, and the first first thermal paper and the second second thermal paper are printed. When printing on both, printing is performed with a second energy amount larger than the first energy amount.
JP 2001-1563 A

  By the way, in notifications with personal information such as test pass / fail results and transaction details of financial institutions, two sheets of paper are detachably stacked, and the first sheet contains general items such as address and address. An information protection sheet may be used in which personal information such as a pass / fail result or transaction details is described on the second sheet. This is intended to protect personal information by concealing the personal information printed on the second sheet with the first sheet. However, in order to create such an information protection sheet, it is necessary to print the first sheet and the second sheet separately and then bond them together. there were.

  Therefore, as in the invention described in Patent Document 1, using a thermal copying sheet in which a plurality of thermal papers are detachably stacked, general items are printed on the first thermal paper, and the second thermal paper is printed. It is conceivable to print personal information on paper. According to this, both the thermal papers can be printed at the same time, and it is not necessary to stick the two thermal papers together, so that the manufacturing cost and labor of the information protection sheet can be reduced. However, in this thermal copy sheet, the content printed on the second thermal paper is always printed on the first thermal paper, so personal information to be printed only on the second thermal paper. However, there is a problem that the image is also printed on the first thermal paper.

  The present invention has been made to solve the above problems, and in a thermal copying sheet in which a plurality of thermal papers are detachably overlapped, different contents can be printed on each thermal paper, and the thermal sensitivity on the back side. It is an object of the present invention to provide a thermal copying sheet and a thermal copying printer that can conceal confidential information printed on paper.

In order to achieve the above object, the thermal copying printer according to the first aspect of the present invention provides a thermal copying printer in which a plurality of common thermal papers each having a color-developing layer that is colored by predetermined heat generation are laminated on a mount so as to be peelable. Using the sheet, coloring energy due to heat generation is applied from a direction facing the first thermal paper, which is the first thermal paper, and at least the first thermal paper and the second thermal paper, the second thermal paper . In the case of a thermal copying printer for printing on thermal paper and printing only on the first thermal paper , a coloring energy corresponding to a first energy amount that only the coloring layer of the first thermal paper develops color is obtained. On the other hand, when printing on the second thermal paper, printing means for applying a coloring energy corresponding to the second energy amount that the coloring layers of both the first thermal paper and the second thermal paper develop color The printing means applies color development energy corresponding to the second energy amount to print on the second thermal paper, and at least includes a print portion of the second thermal paper, An information concealing unit for concealing the print contents on the second thermal paper is printed on the first thermal paper by applying a coloring energy corresponding to the first energy amount.
According to a second aspect of the present invention, in addition to the configuration of the first aspect of the invention, the printing unit is configured to print the data on the thermal copying sheet based on printing data indicating the content to be printed. Whether or not there is concealment area data indicating an area for printing the information concealment unit on a print target line, which is the line to which the color development energy is applied by the printing unit, in which the color development energy is applied in line units. A first determination unit that determines whether or not there is the hidden area data by the first determination unit, and corresponds to the first energy amount from the printing unit. Applying the coloring energy to the first print control means for printing the information concealing portion on the print target line, and the second heat sensitive to the print target line. A second determination unit that determines whether or not there is secret print data to be displayed only on the basis of the print data; and when the second determination unit determines that there is the secret print data, The secret print data is printed on the print target line by applying a coloring energy corresponding to the second energy amount from the printing unit within the range of the information concealment unit printed by one printing control unit. Second print control means.

According to a third aspect of the present invention, there is provided a thermal copying printer using a thermal copying sheet in which a plurality of common thermal papers each having a color developing layer that is colored by predetermined heat generation are laminated on a mount so as to be peelable. th said color energy due to heat generation from a direction opposite to the first heat-sensitive paper is thermal paper is applied, the second heat-sensitive paper is at least the first heat sensitive paper and the second sheet of the thermal paper and the third sheet In the thermal copying printer for printing on the third thermal paper, which is the thermal paper, when printing only on the first thermal paper, only the coloring layer of the first thermal paper is colored. When the coloring energy corresponding to the energy amount is applied and printing is performed on the second thermal paper and the third thermal paper, all the coloring of the first thermal paper, the second thermal paper, and the third thermal paper is performed. The third energy that the layer develops Printing means for applying a coloring energy corresponding to the amount, and the printing means applies a coloring energy corresponding to the third energy amount and is identical to the second thermal paper and the third thermal paper. The second thermal paper is printed by applying coloring energy corresponding to the first energy amount to a range including at least the print portions of the second thermal paper and the third thermal paper. And the information concealment part for concealing the printing content in the said 3rd thermal paper is printed on the said 1st thermal paper, It is characterized by the above-mentioned.
According to a fourth aspect of the present invention, in addition to the configuration of the third aspect of the invention, the printing unit is configured to print the data on the thermal copy sheet based on print data indicating the content to be printed. Whether or not there is concealment area data indicating an area for printing the information concealment unit on a print target line, which is the line to which the color development energy is applied by the printing unit, in which the color development energy is applied in line units. A first determination unit that determines whether or not there is the hidden area data by the first determination unit, and corresponds to the first energy amount from the printing unit. Applying the coloring energy to the first print control means for printing the information concealing portion on the print target line, and the second heat sensitive to the print target line. And second determination means for determining whether or not there is secret print data to be displayed on the third thermal paper based on the print data, and the second determination means determines that the secret print data is present. In this case, by applying coloring energy corresponding to the third energy amount from the printing unit within the range of the information concealment unit printed by the first printing control unit, the secret line is applied to the print target line. Second print control means for printing the print data.
In addition to the configuration of the invention described in claim 2 or 4, the thermal copying printer of the invention according to claim 5 has whether or not there is normal print data to be displayed only on the first thermal paper in the print target line. And a color development corresponding to the first energy amount from the printing means when the third judgment means judges that the normal print data is present. A third print control unit that prints the normal print data on the print target line by applying energy;
A thermal copy sheet according to a sixth aspect of the invention is printed by the thermal copy printer according to any one of the first to fifth aspects.

In the thermal copying printer according to the first aspect of the present invention, the first thermal paper and the second thermal paper are superposed and printed on the thermal copying sheet to which coloring energy is applied toward the first thermal paper. Apply coloring energy for coloring both the first and second thermal papers, and apply coloring energy for coloring only the first thermal paper in a range that includes at least the print area of the second thermal paper. And an information concealing unit for concealing the print contents of the second thermal paper. Therefore, even if the information concealment portion is not formed in advance on the thermal copy sheet in which the two thermal papers are detachably overlapped, different contents can be printed on the first thermal paper and the second thermal paper, In addition, the secret information printed on the second thermal paper can be concealed. Furthermore, the information concealment unit can be set at an arbitrary position.
In the thermal copying printer of the invention according to claim 2, in addition to the effect of the invention of claim 1, it is possible to print the thermal copying sheet as described above with a thermal head that applies coloring energy in units of lines. it can.

In the thermal copying printer according to the third aspect of the invention, the first thermal paper, the second thermal paper, and the third thermal paper are superimposed on each other and printed on the thermal copying sheet to which the coloring energy is applied toward the first thermal paper. And applying the coloring energy for coloring all of the first to third thermal papers, and at least including the printing parts of the second thermal paper and the third thermal paper, An information concealing unit for concealing the printing contents of the second and third thermal papers by applying a coloring energy for coloring only the paper is provided on the first thermal paper. Therefore, even if the information concealment part is not formed in advance on the thermal copy sheet on which the three thermal papers are detachably overlapped, different contents are printed on the first thermal paper, the second thermal paper, and the third thermal paper. And secret information printed on the second and third thermal papers can be concealed. Furthermore, the information concealment unit can be set at an arbitrary position.
Furthermore, the same print content as that of the second thermal paper is printed on the third thermal paper. Therefore, the print contents of the second thermal paper can be confirmed by referring to the third thermal paper.
In the thermal copying printer of the invention according to claim 4, in addition to the effect of the invention of claim 3, it is possible to print the thermal copying sheet as described above with a thermal head that applies coloring energy in units of lines. it can.
Further, in the thermal copying printer of the invention according to claim 5, in addition to the effect of the invention of claim 2 or 4, it is possible to print normal print data displayed only on the first thermal paper.
In the thermal copy sheet of the invention according to claim 6, different contents can be printed on each thermal paper, and secret information printed on the thermal paper on the back side can be concealed.

  Hereinafter, a first embodiment of the present invention will be described. The first embodiment exemplifies a case where the thermal copying printer 1 prints secret information on a thermal copying sheet 10 in which two thermal papers are detachably overlapped and an information concealment portion is formed in advance. I will explain.

  First, the mechanical configuration of the thermal copying printer 1 will be described. FIG. 1 is a schematic configuration diagram of a thermal copying printer 1. In addition, about other embodiment, FIG. 1 and its description are also common.

  As shown in FIG. 1, the thermal copying printer 1 is fed with a thermal copying sheet 10 inserted from an insertion port (not shown) toward a discharge port (not shown) provided at a position facing the insertion port. The heat-sensitive copying sheet 10 is transported on the transport path. A thermal head 3 which is a printing unit having a sheet-side conveying roller 2 and a heating resistor for each pixel as a printing (printing) head for one line (a plurality of pixels) in the conveyance path of the thermal copying sheet 10; The paper discharge-side transport rollers 5 are arranged in order from the insertion port to the discharge port. In addition, a platen roller 4 is disposed at an opposite portion across the conveyance path of the thermal head 3. The thermal head 3 generates heat with different energy amounts by changing the energization pulse applied to each pixel unit. The thermal copying printer 1 and the thermal copying sheet 10 are for monochrome printing.

  Here, the configuration of the thermal copying sheet 10 in the first embodiment will be described. FIG. 2 is an external perspective view of the thermal copying sheet 10 according to the first embodiment. FIG. 3 is an enlarged side cross-sectional view of the thermal copying sheet 10 according to the first embodiment. 2 and 3 show a state before the thermal papers are bonded to each other at the end 10a of the thermal copying sheet 10 and the thermal papers are bonded.

  As shown in FIG. 2, the thermal copying sheet 10 according to the present embodiment has a two-sheet structure in which two thermal papers are superimposed, and the first thermal paper 11 corresponding to the surface side of the thermal copying sheet 10, It is comprised from the 2nd thermal paper 12 which hits the back side. As shown in FIG. 3, the first thermal paper 11 has a structure in which a coloring layer 11b is laminated on a mount 11a, and a coating layer 11c is laminated on the coloring layer 11b. Similarly, the second thermal paper 12 has a structure in which a coloring layer 12b is laminated on a mount 12a, and a coating layer 12c is laminated on the coloring layer 12b. Furthermore, in this embodiment, the information concealment unit 110 with black solid printing is formed by applying a predetermined coloring energy to a predetermined range of the first thermal paper 11 in advance to cause the coloring layer 11b to develop color. Details will be described later.

  The first thermal paper 11 is made of a special adhesive having a characteristic that the once-bonded sheet can be peeled again (removability) and a characteristic that cannot be re-bonded once peeled (re-adhesion prevention). The back surface (mounting sheet 11a) and the surface of the second thermal paper 12 (coating layer 12c) are bonded together over the entire surface. As this special adhesive, as long as it has re-peelability and anti-re-adhesion properties, known epoxy adhesives, acrylic adhesives, polyurethane adhesives, radiation curable adhesives, solvent adhesives, etc. May be used. In order to provide removability, a method of adding a pigment to the main component of the adhesive is generally known. In order to give re-peelability, the main component is a pressure sensitive adhesive such as NR (natural rubber), SBR (styrene butadiene rubber), acrylic resin, etc., and microsilica as a pigment component having a certain particle size, It is known to add clay, talc, starch and the like. However, the special adhesive used for the thermal copying sheet 10 needs to have its properties not changed by heating during printing of the thermal copying printer 1.

  Next, the electrical configuration of the thermal copying printer 1 and the printing operation on the thermal copying sheet 10 will be described. FIG. 4 is a block diagram of the thermal copying printer 1. FIG. 5 is a diagram illustrating a printing operation on the thermal copying sheet 10. 4 and 5 and the description thereof are common to other embodiments.

  As shown in FIG. 4, the thermal copying printer 1 is provided with a CPU (Central Processing Unit) 30 that controls the whole. The system bus 31 of the CPU 30 is connected to a ROM (Read Only Memory) 32 in which a control program is stored, a RAM (Random Access Memory) 33 in which various work areas are set, and an external device. An interface (IF) 34 used, a thermal head drive circuit 35 for driving the thermal head 3, a motor drive circuit 38 for driving motors 36 and 37 for rotating the paper feed side transport roller 2 and the paper discharge side transport roller 5, respectively, transport A sensor control circuit 40 that receives signals from a plurality of sensors 39 that detect the conveyance state of the thermal copying sheet 10 on the road is connected.

  Here, the thermal copying printer 1 is connected to a personal computer (PC) (not shown) via an interface (I / F) 34. Then, printing data indicating the contents to be printed on the thermal copy sheet 10 is input from the personal computer (PC) via the interface (I / F) 34 and stored in a predetermined storage area of the RAM 33. In the present embodiment, it is assumed that printing data having contents for notifying the result of the test is stored in the RAM 33 in advance. Specifically, the printing data includes normal print data indicating general information such as an address and an address to be displayed on the first thermal paper 11 and personal information such as a pass / fail result to be displayed on the second thermal paper 12. Secret print data to be displayed.

  As shown in FIG. 5, the thermal copying printer 1 executes the following printing operation. That is, the thermal copy sheet 10 inserted from an insertion port not shown is conveyed on the conveyance path by the various rollers 2 and 5. Then, the thermal head 3 applies heat line by line from the surface side (first thermal paper 11 side) of the thermal copying sheet 10, and the first thermal paper 11 and the second thermal paper are based on the printing data stored in the RAM 33. 12 is printed. Thereafter, the thermal copy sheet 10 is discharged from a discharge port not shown. Thereby, in the thermal copying sheet 10, different contents are simultaneously printed on a plurality of thermal papers (the first thermal paper 11 and the second thermal paper 12) by one printing operation. Details of the printing process are as follows. It will be described later.

  Details of the printing process in the thermal copying printer 1 in the first embodiment will be described below. FIG. 6 is a flowchart showing a printing process in the thermal copying printer 1 in the first embodiment. FIG. 7 is a diagram showing energization pulses of the first coloring energy supplied to the thermal head 3. FIG. 8 is a diagram showing energization pulses of the second coloring energy supplied to the thermal head 3. In the printing process shown in FIG. 6, when the user instructs printing execution from a personal computer (PC) (not shown), a printing execution command is transmitted to the thermal copying printer 1, and the CPU 30 is based on the printing execution command. Shall be executed.

  As shown in FIG. 6, in the printing process of the thermal copying printer 1 according to the present embodiment, first, a sheet feeding process for feeding the thermal copying sheet 10 is executed (S1). In this paper feeding process, when the thermal copy sheet 10 is inserted from an insertion port (not shown), the thermal copy sheet 10 is moved in front of the thermal head 3 by the feed-side transport roller 2 by the drive control of the motors 36 and 37. It is transported to the initial position.

  Then, it is determined whether or not the print data stored in the RAM 33 includes normal print data to be displayed on the first thermal paper 11 (S3). As a result, when it is determined that there is normal print data (S3: YES), the heating resistor of the thermal head 3 is changed based on the transport position of the thermal copy sheet 10 with respect to the thermal head 3 and the output position of the normal print data. The first coloring energy is applied to the thermal copying sheet 10 by generating heat (S5). If it is determined that there is no normal print data (S3: NO), the process proceeds to the next step (S7).

  Here, in order to print only on the first sheet of the first thermal paper 11, it is necessary to apply an energy amount corresponding to the reference energy that can be developed only by the coloring layer 11b. Therefore, in S5, the first coloring energy corresponding to the reference energy is applied from the thermal head 3 to the thermal copying sheet 10. That is, as shown in FIG. 7, an energization pulse corresponding to the first color development energy is supplied to the thermal head 3, and the amount of heat generated by the thermal head 3 is controlled to be equal to the reference energy. As a result, only the first thermal paper 11 is colored, and the normal print data is printed on the first thermal paper 11.

  Next, it is determined whether or not there is secret print data to be displayed on the second thermal paper 12 in the print data stored in the RAM 33 (S7). As a result, if it is determined that there is secret print data (S7: YES), the heating resistor of the thermal head 3 is changed based on the transport position of the thermal copy sheet 10 with respect to the thermal head 3 and the output position of the secret print data. Heat is generated, and the second coloring energy is applied to the thermal copying sheet 10 within a range where the information hiding unit 110 is printed (S9). If it is determined that there is no secret print data (S7: NO), the process proceeds to the next step (S11).

  Here, in order to print on the second second thermal paper 12, in order to allow the color development layer 12b of the second thermal paper 12 behind the first thermal paper 11 to develop a color with reference energy capable of color development. It is necessary to apply an energy amount corresponding to the total energy obtained by adding the additional energy A. Therefore, in S <b> 9, the second coloring energy corresponding to this total energy is applied from the thermal head 3 to the thermal copying sheet 10. That is, as shown in FIG. 8, an energization pulse corresponding to the second coloring energy is supplied to the thermal head 3 so that the amount of heat generated by the thermal head 3 becomes equal to the total energy (reference energy + additional energy A). Controlled.

  On the other hand, the secret print data should be displayed only on the second thermal paper 12, but when the second coloring energy is applied, the same content is printed on the first thermal paper 11 in front. Therefore, in S9, the second coloring energy is applied within the range of the information concealment unit 110 that has been previously printed with black solid. As a result, even if both the first thermal paper 11 and the second thermal paper 12 can be colored, the first thermal paper 11 does not display the secret print data within the range of the information concealment unit 110, and the second thermal paper. Only 12 is the secret print data.

  In the present embodiment, the following measures are taken so that the second coloring energy is accurately applied within the printing range of the information hiding unit 110 in S9. That is, in the thermal copying sheet 10, at least the corresponding portion (the secret in FIG. 9) is displayed on the first thermal paper 11 corresponding to the portion to be printed of the secret print data on the second thermal paper 12 (the secret information display portion 120 in FIG. 9). An information concealment unit 110 having a size and shape that covers the entire information display unit 120) is preliminarily printed. Further, the print data stored in the RAM 33 is instructed so that the output position of the secret print data is within the print range of the information concealment unit 110.

  As described above, after the printing based on the normal print data and the secret print data for one line is executed, the thermal copy sheet 10 is conveyed by one line by the platen roller 4 by the drive control of the motors 36 and 37. (S11). Then, it is determined whether or not all printing has been completed for the printing data stored in the RAM 33 (S13). If printing has not ended (S13: NO), the process returns to S3, and printing based on the normal print data and the secret print data is executed for the next line (S3 to S11). On the other hand, when printing is completed (S13: YES), the thermal copy sheet 10 is conveyed by the discharge-side conveying roller 5 and discharged from a discharge port (not shown) by driving control of the motors 36 and 37 (S15). Then, the printing process ends.

  Specifically, the thermal copy sheet 10 printed by the above printing process (FIG. 6) will be described. FIG. 9 is a diagram showing each thermal paper of the thermal copying sheet 10 before printing in the first embodiment. FIG. 10 is a diagram showing each thermal paper of the thermal copying sheet 10 after printing in the first embodiment. 9 and 10 show the thermal copying sheet 10 in a state where each thermal paper is separated for easy understanding.

  As shown in FIG. 9, the thermal copy sheet 10 before printing covers at least the secret information display part 120 corresponding to the secret information display part 120 of the second thermal paper 12 as described above. A size and shape information hiding part 110 is preliminarily printed on the first thermal paper 11. The information concealment unit 110 of the present embodiment is a rectangular solid black printed part having a size that covers the entire secret information display unit 120.

  Then, as shown in FIG. 10, the text 111 indicating the normal print data is printed only on the first thermal paper 11 by applying the first coloring energy (S 5) to the thermal copying sheet 10 after printing. On the other hand, the pass / fail result 121 indicating the secret print data is printed on the secret information display section 120 of the second thermal paper 12 by applying the second coloring energy (S9). At the same time, the second coloring energy is also applied to the information concealment unit 110 of the first thermal paper 11, but the pass / fail result 121 is not displayed because the information concealment unit 110 has already been solid black printed.

  As described above, in this embodiment, the text 111 is printed on the first thermal paper 11 and the pass / fail result 121 is displayed on the second thermal paper 12 in one printing operation on the thermal copying sheet 10 by the thermal copying printer 1. Printed. Moreover, since the pass / fail result 121 cannot be known unless the first thermal paper 11 is peeled off, leakage of confidential information to a third party is prevented.

  As described above, according to the first embodiment, in the thermal copying sheet 10 in which the first thermal paper 11 and the second thermal paper 12 are overlapped, the first corresponding to the secret information display unit 120 of the second thermal paper 12. An information hiding part 110 was formed on the thermal paper 11. In the thermal copying printer 1, when secret information is printed on the thermal copying sheet 10, the second coloring energy is applied within the range where the information hiding portion 110 is formed. Therefore, different contents can be printed on the first thermal paper 11 and the second thermal paper 12, and the secret information printed on the second thermal paper 12 can be concealed.

  Next, a second embodiment of the present invention will be described. In the second embodiment, a thermal copy printer is provided on a thermal copy sheet 10 in which three thermal papers, the third of which functions as a user confirmation sheet, are detachably superimposed and an information concealment portion is formed in advance. An example in which 1 prints secret information will be described. Below, it demonstrates centering on a different point from 1st Embodiment, and shall use the same code | symbol for the same structure as 1st Embodiment.

  First, the configuration of the thermal copying sheet 10 in the second embodiment will be described. FIG. 11 is an external perspective view of the thermal copying sheet 10 according to the second embodiment. FIG. 12 is an enlarged side sectional view of the thermal copying sheet 10 according to the second embodiment. 11 and 12 show a state before the thermal papers are bonded to each other at the end portion 10a of the thermal copying sheet 10 and the thermal papers are bonded to each other.

  As shown in FIG. 11, the thermal copying sheet 10 according to the present embodiment has a three-sheet structure in which three thermal papers are overlapped, and the first thermal paper 11 corresponding to the surface side of the thermal copying sheet 10, It is composed of a third thermal paper 13 on the back side, and a second thermal paper 12 located in an intermediate layer between the first thermal paper 11 and the third thermal paper 13. As shown in FIG. 12, the third thermal paper 13 also has a color developing layer 13b laminated on the mount 13a, as in the case of the first thermal paper 11 and the second thermal paper 12, and the coating on the color developing layer 13b. The layer 13c is laminated. As in the first embodiment, the information concealment unit 110 is formed in advance in a predetermined range of the first thermal paper 11. The third thermal paper 13 is used as a user confirmation sheet as will be described later.

  Next, details of the printing process in the thermal copying printer 1 in the second embodiment will be described. FIG. 13 is a flowchart showing print processing in the thermal copying printer 1 according to the second embodiment. FIG. 14 is a diagram showing the energization pulse of the third coloring energy supplied to the thermal head 3. In the present embodiment, in the printing data stored in the RAM 33, the secret print data should be displayed on the second thermal paper 12 and the third thermal paper 13.

  As shown in FIG. 13, the printing process of the thermal copying printer 1 according to this embodiment is basically the same as that of the first embodiment (FIG. 6), but the secret print data included in the print data is changed. The third thermal paper 13 is also different in that it is printed. That is, when it is determined that there is secret print data (S27: YES), the third coloring energy is applied to the thermal copying sheet 10 within the range where the information concealment unit 110 is printed (S29). Note that S21 to S27 and S31 to S35 in FIG. 13 are the same as S1 to S7 and S11 to S15 in FIG.

  In order to print on the third third thermal paper 13, the total energy (reference energy + additional energy A) that can be developed by both the first thermal paper 11 and the second thermal paper is changed to the second energy behind the first thermal paper 11. It is necessary to apply an amount of energy corresponding to the total energy including the additional energy B for enabling the coloring layer 13b of the three thermal paper 13 to develop a color. Therefore, in S29, the third coloring energy corresponding to this total energy is applied from the thermal head 3 to the thermal copying sheet 10. That is, as shown in FIG. 14, an energization pulse corresponding to the third coloring energy is supplied to the thermal head 3, and the amount of heat generated by the thermal head 3 is the total energy (reference energy + addition energy A + addition energy B). Controlled to be equal.

  Specifically, the thermal copy sheet 10 printed by the above printing process (FIG. 13) will be described. FIG. 15 is a diagram showing each thermal paper of the thermal copying sheet 10 before printing in the second embodiment. FIG. 16 is a diagram showing each thermal paper of the thermal copying sheet 10 after printing in the second embodiment. 15 and 16 show the thermal copying sheet 10 in a state where each thermal paper is separated for easy understanding.

  As shown in FIG. 15, on the thermal copy sheet 10 before printing, information concealment corresponding to the secret information display unit 120 of the second thermal paper 12 is performed, as in the first embodiment (see FIG. 9). The portion 110 is preliminarily printed on the first thermal paper 11. Also, the secret information copying unit 130 is a print target portion of the secret print data on the third thermal paper 13 corresponding to the secret information display unit 120 of the second thermal paper 12.

  Then, as shown in FIG. 16, text 111 indicating normal print data is printed only on the first thermal paper 11 by applying the first coloring energy (S 25) to the thermal copying sheet 10 after printing. On the other hand, by applying the third coloring energy (S29), the pass / fail result 121 indicating the secret print data is printed on the secret information display unit 120 of the second thermal paper 12, and the secret information copying unit 130 of the third thermal paper 13 is printed. The same pass / fail result 131 as the pass / fail result 121 is also printed. At the same time, the third coloring energy is also applied to the information concealment unit 110 of the first thermal paper 11, but the pass / fail result 121 is not displayed because the information concealment unit 110 has already been solid black printed.

  As described above, in this embodiment, the text 111 is printed on the first thermal paper 11 and the pass / fail result 121 is printed on the second thermal paper 12 in one printing operation on the thermal copying sheet 10 by the thermal copying printer 1. Then, the pass / fail result 131 is printed on the third thermal paper 13. Moreover, since the pass / fail result 121 cannot be known unless the first thermal paper 11 is peeled off, leakage of confidential information to a third party is prevented. Further, the user who is performing the printing operation can refer to the contents printed on the third thermal paper 13 that is the user confirmation sheet (copy pass / fail result 131) without removing the first thermal paper 11, 2 The print contents (pass / fail result 121) on the thermal paper 12 can be confirmed.

  As described above, according to the second embodiment, in the thermal copying sheet 10 in which the first thermal paper 11, the second thermal paper 12, and the third thermal paper 13 are superimposed, the secret information display unit 120 of the second thermal paper 12 is displayed. The information hiding part 110 was formed on the first thermal paper 11 correspondingly. When the confidential information is printed on the thermal copying sheet 10 in the thermal copying printer 1, the third coloring energy is applied within the range where the information hiding portion 110 is formed, and the second thermal paper 13 is applied with the second coloring energy. The same print content as that of the thermal paper 12 is printed. Therefore, different contents can be printed on the first thermal paper 11, the second thermal paper 12, and the third thermal paper 13, and the secret information printed on the second thermal paper 12 can be concealed. Furthermore, the print contents of the second thermal paper 12 can be confirmed by referring to the third thermal paper 13.

  Next, a third embodiment of the present invention will be described. In the third embodiment, a thermal copying printer is provided on a thermal copying sheet 10 in which three sheets of thermal paper, the first of which functions as a management preservation sheet, are detachably superimposed and an information concealing portion is formed in advance. An example in which 1 prints secret information will be described. The following description will focus on differences from the second embodiment, and the same reference numerals will be used for the same configurations as those of the second embodiment.

  First, the configuration of the thermal copying sheet 10 in the third embodiment will be described. FIG. 17 is an external perspective view of the thermal copy sheet 10 according to the third embodiment. FIG. 17 shows a state before the thermal papers are bonded to each other at the end portion 10a of the thermal copying sheet 10 and the thermal papers are bonded.

  As shown in FIGS. 17 and 12, the thermal copying sheet 10 according to the present embodiment has a three-sheet structure in which three thermal papers are overlapped as in the second embodiment (FIG. 11). Yes. However, the present embodiment is different in that an information concealment section 122 is formed by printing the second thermal paper 12 with black solid coating. And the 1st thermal paper 11 does not have the information concealment part 110 (refer FIG. 11), and is used as a management preservation | save sheet | seat so that it may mention later.

  Next, details of the printing process in the thermal copying printer 1 in the third embodiment will be described. FIG. 18 is a flowchart showing print processing in the thermal copying printer 1 according to the third embodiment. In the present embodiment, the printing data stored in the RAM 33 includes management print data indicating management information such as a serial number to be displayed on the first thermal paper 11, and the normal print data is the first print data. The secret print data is to be displayed on the first thermal paper 11 and the third thermal paper 13 and should be displayed on the thermal paper 11 and the second thermal paper 12.

  As shown in FIG. 18, in the printing process of the thermal copying printer 1 according to this embodiment, after the paper feeding process (S41) is executed, the printing data stored in the RAM 33 is added to the first thermal paper 11. It is determined whether there is management print data to be displayed (S43). As a result, if it is determined that there is management print data (S43: YES), the heating resistor of the thermal head 3 is changed based on the transport position of the thermal copy sheet 10 with respect to the thermal head 3 and the output position of the management print data. The first coloring energy (see FIG. 7) is applied to the thermal copying sheet 10 by generating heat (S45). If it is determined that there is no management print data (S43: NO), the process proceeds to the next step (S47).

  Next, it is determined whether or not the print data stored in the RAM 33 includes normal print data to be displayed on the second thermal paper 12 (S47). As a result, when it is determined that there is normal print data (S47: YES), the heating resistor of the thermal head 3 is changed based on the transport position of the thermal copy sheet 10 with respect to the thermal head 3 and the output position of the normal print data. The second coloring energy (see FIG. 8) is applied to the thermal copying sheet 10 by generating heat (S49). If it is determined that there is no normal print data (S47: NO), the process proceeds to the next step (S51).

  Next, it is determined whether or not there is secret print data to be displayed on the third thermal paper 13 in the print data stored in the RAM 33 (S51). As a result, if it is determined that there is secret print data (S51: YES), the heating resistor of the thermal head 3 is changed based on the transport position of the thermal copy sheet 10 with respect to the thermal head 3 and the output position of the secret print data. The third coloring energy (see FIG. 14) is applied to the thermal copying sheet 10 within a range where the information hiding unit 110 is printed (S53). If it is determined that there is no secret print data (S51: NO), the process proceeds to the next step (S55).

  As described above, after the printing based on the normal print data and the secret print data for one line is executed, the thermal copy sheet 10 is conveyed by one line (S55), and it is determined whether or not the printing is finished. (S57). If printing has not ended (S57: NO), the process returns to S43. When the printing is finished (S57: YES), the thermal copying sheet 10 is discharged (S59), and the printing process is finished.

  Specifically, the thermal copy sheet 10 printed by the above printing process (FIG. 18) will be described. FIG. 19 is a diagram showing each thermal paper of the thermal copying sheet 10 before printing in the third embodiment. FIG. 20 is a diagram showing each thermal paper of the thermal copying sheet 10 after printing in the third embodiment. 19 and 20 show the thermal copying sheet 10 in a state where each thermal paper is separated for easy understanding.

  As shown in FIG. 19, on the thermal copy sheet 10 before printing, an information concealment unit 122 is preliminarily provided in the second thermal paper 12 in correspondence with the print target portion (secret information display unit 132) of the secret print data. Printed on the thermal paper 12. Further, the secret information copying unit 112 is a print target portion of the secret print data on the first thermal paper 11 corresponding to the secret information display unit 132 of the third thermal paper 13.

  Then, as shown in FIG. 20, the serial number 113 indicating the management print data is printed only on the first thermal paper 11 by applying the first coloring energy (S45) on the thermal copying sheet 10 after printing. In addition, by applying the second coloring energy (S49), the text 123 indicating the normal print data is printed on the second thermal paper 12, and the same duplicate text 114 as the text 123 is printed on the first thermal paper 11. Further, the pass / fail result 133 indicating the secret print data is printed on the secret information display unit 132 of the third thermal paper 13 by the application of the third coloring energy (S53), and the secret information copying unit 112 of the first thermal paper 11 is printed. The same pass / fail result 115 as the pass / fail result 133 is also printed. At the same time, the third coloring energy is also applied to the information hiding portion 122 of the second thermal paper 12, but the information hiding portion 122 is already black solid printed, so the pass / fail result 133 is not displayed.

  As described above, in this embodiment, the serial number 113, the copy text 114, and the copy pass / fail result 115 are printed on the first thermal paper 11 by one printing operation on the thermal copy sheet 10 by the thermal copy printer 1. The text 123 is printed on the second thermal paper 12, and the pass / fail result 133 is printed on the third thermal paper 13, respectively. Further, since the pass / fail result 133 cannot be known unless the second thermal paper 12 is peeled off, leakage of confidential information to a third party is prevented. Further, the user who is performing the printing work peels off and stores only the first thermal paper 11 that is the management storage sheet, and the contents printed on the first thermal paper 11 (reference number 113, copy text 114, Based on the copy pass / fail result 115), the print content (text 123) on the second thermal paper 12 and the print content on the third thermal paper 13 (pass / fail result 133) can be managed in association with the reference number 113. .

  As described above, according to the third embodiment, in the thermal copying sheet 10 in which the first thermal paper 11, the second thermal paper 12, and the third thermal paper 13 are superimposed, the secret information display unit 132 of the third thermal paper 13. In response to this, an information hiding portion 122 was formed on the second thermal paper 12. When the confidential information is printed on the thermal copying sheet 10 in the thermal copying printer 1, the third coloring energy is applied within the range where the information concealing portion 122 is formed, and the first thermal paper 13 is applied with the first coloring energy. The same print content as that of the thermal paper 11 is printed. Therefore, different contents can be printed on the first thermal paper 11, the second thermal paper 12, and the third thermal paper 13, and the secret information printed on the third thermal paper 13 can be concealed. Furthermore, by removing the first thermal paper 11 and storing it, it is possible to manage all of the contents printed on the second thermal paper 12 and the third thermal paper 13.

  Next, a fourth embodiment of the present invention will be described. The fourth embodiment exemplifies a case where the thermal copying printer 1 prints confidential information on a thermal copying sheet 10 in which two thermal papers are detachably overlapped and no information hiding portion is formed. I will explain. Below, it demonstrates centering on a different point from 1st Embodiment, and shall use the same code | symbol for the same structure as 1st Embodiment.

  First, the configuration of the thermal copy sheet 10 in the fourth embodiment will be described. FIG. 21 is an external perspective view of the thermal copy sheet 10 according to the fourth embodiment. FIG. 21 shows a state before the thermal papers are overlapped at the end portion 10a of the thermal copying sheet 10 and the thermal papers are bonded.

  As shown in FIGS. 21 and 3, the thermal copying sheet 10 according to the present embodiment is basically the same as the first embodiment, but the information concealment unit 110 is formed on the first thermal paper 11. There is no difference (see FIG. 2). Therefore, in the present embodiment, the information concealment unit 110 is formed on the first thermal paper 11 by the following printing process.

  Next, details of the printing process in the thermal copying printer 1 in the fourth embodiment will be described. FIG. 22 is a flowchart showing print processing in the thermal copying printer 1 according to the fourth embodiment. In the present embodiment, the printing data stored in the RAM 33 is concealed area data indicating an area where black solid printing should be performed on the first thermal paper 11 in addition to the normal print data and the secret print data. Is included.

  As shown in FIG. 22, in the printing process of the thermal copying printer 1 according to the present embodiment, after the paper feeding process (S61) is executed, the printing data stored in the RAM 33 is added to the first thermal paper 11. It is determined whether there is concealment area data to be printed in black (S63). As a result, if it is determined that there is concealment area data (S63: YES), the heating resistor of the thermal head 3 is changed based on the transport position of the thermal copy sheet 10 with respect to the thermal head 3 and the output position of the concealment area data. The first coloring energy (see FIG. 7) is applied to the thermal copying sheet 10 by generating heat (S65). When it is determined that there is no hidden area data (S63: NO), the process proceeds to the next step (S67).

  Next, it is determined whether or not the print data stored in the RAM 33 includes normal print data to be displayed on the first thermal paper 11 (S67). As a result, if it is determined that there is normal print data (S67: YES), the heating resistor of the thermal head 3 is changed based on the transport position of the thermal copy sheet 10 with respect to the thermal head 3 and the output position of the normal print data. The first coloring energy (see FIG. 7) is applied to the thermal copying sheet 10 by generating heat (S69). If it is determined that there is no normal print data (S67: NO), the process proceeds to the next step (S71).

  Next, it is determined whether or not there is secret print data to be displayed on the second thermal paper 12 in the print data stored in the RAM 33 (S71). As a result, if it is determined that there is secret print data (S71: YES), the heating resistor of the thermal head 3 is changed based on the transport position of the thermal copy sheet 10 with respect to the thermal head 3 and the output position of the secret print data. Heat is generated, and the second coloring energy (see FIG. 8) is applied to the thermal copying sheet 10 within the output range of the hidden area data (S73). If it is determined that there is no secret print data (S71: NO), the process proceeds to the next step (S75).

  Here, the secret print data should be displayed only on the second thermal paper 12, but when the second coloring energy is applied, the same content is printed on the first thermal paper 11 in front. Therefore, in S73, the second coloring energy is applied within the output range of the concealment area data (that is, within the range of the information concealment unit 110 printed in S65). As a result, even if both the first thermal paper 11 and the second thermal paper 12 can be colored, the first thermal paper 11 has the secret print data within the output range of the concealment area data (within the print range of the information concealment unit 110). ), The secret print data is displayed only on the second thermal paper 12.

  In this embodiment, in the print data stored in the RAM 33, the output range of the hidden area data is the secret print data so that the second coloring energy is accurately applied within the output range of the hidden area data in S73. The size and shape are instructed to include all the output positions. For this reason, the output position of the secret print data always overlaps the output range of the hidden area data.

  As described above, after printing based on the concealment area data for one line, the normal print data, and the secret print data is executed, the thermal copy sheet 10 is conveyed by one line (S75), and is the printing completed? It is determined whether or not (S77). If printing has not ended (S77: NO), the process returns to S63. When the printing is finished (S77: YES), the thermal copy sheet 10 is discharged (S79), and the printing process is finished.

  Specifically, the thermal copy sheet 10 printed by the above printing process (FIG. 22) will be described. FIG. 23 is a diagram showing each thermal paper of the thermal copying sheet 10 before printing in the fourth embodiment. FIG. 24 is a diagram showing each thermal paper of the thermal copying sheet 10 after printing in the fourth embodiment. 23 and 24 show the thermal copying sheet 10 in a state in which each thermal paper is separated for easy understanding.

  As shown in FIG. 23, the thermal copy sheet 10 before printing has a size and shape corresponding to the secret information display part 120 of the second thermal paper 12 and covering at least the secret information display part 120. The portion to be printed of the concealment area data on the first thermal paper 11 is the information concealment part forming unit 116.

  Then, as shown in FIG. 24, the black solid information hiding portion 110 is printed only on the first thermal paper 11 by applying the first coloring energy (S 65) to the thermal copying sheet 10 after printing. Further, by applying the first coloring energy (S69), the text 111 indicating the normal print data is printed only on the first thermal paper 11. Further, the pass / fail result 121 indicating the secret print data is printed on the secret information display section 120 of the second thermal paper 12 by applying the second coloring energy (S73). At the same time, the second coloring energy is also applied to the information concealing part forming unit 116 of the first thermal paper 11, but since the information concealing part 110 is formed in the information concealing part forming unit 116, the pass / fail result 121 is obtained. Do not show.

  As described above, in this embodiment, the information concealment unit 110 and the text 111 are printed on the first thermal paper 11 and printed on the second thermal paper 12 by a single printing operation on the thermal copying sheet 10 by the thermal copying printer 1. A pass / fail result 121 is printed. Since the pass / fail result 121 cannot be known unless the first thermal paper 11 is peeled off, leakage of confidential information to a third party is prevented. Furthermore, the information concealment unit 110 can be printed at an arbitrary position on the first thermal paper 11 with an arbitrary shape and size.

  As described above, according to the fourth embodiment, when the confidential information is printed on the thermal copying sheet 10 in which the first thermal paper 11 and the second thermal paper 12 are overlapped in the thermal copying printer 1, the second thermal paper 12. The second coloring energy is applied toward the secret information display unit 120 and the information hiding unit 110 is printed by applying the first coloring energy toward the information hiding unit forming unit 116 of the first thermal paper 11. did. Therefore, even if the information hiding portion 110 is not formed in advance on the thermal copying sheet 10, different contents can be printed on the first thermal paper 11 and the second thermal paper 12, and printing can be performed on the second thermal paper 12. Confidential information can be concealed. Furthermore, the information hiding unit 110 can be set at an arbitrary position.

  Next, a fifth embodiment of the present invention will be described. In the fifth embodiment, a thermal copying printer is provided on the thermal copying sheet 10 in which the third thermal paper that functions as a user confirmation sheet is peelably overlapped and no information hiding portion is formed. An example in which 1 prints secret information will be described. In the following, differences from the second and fourth embodiments will be mainly described, and the same reference numerals are used for the same configurations as those of the second and fourth embodiments.

  First, the configuration of the thermal copy sheet 10 in the fifth embodiment will be described. FIG. 25 is an external perspective view of the thermal copy sheet 10 according to the fifth embodiment. FIG. 25 shows a state before the thermal papers are overlapped at the end portion 10a of the thermal copying sheet 10 and the thermal papers are bonded.

  As shown in FIGS. 25 and 12, the thermal copying sheet 10 according to the present embodiment is basically the same as the second embodiment, but the information concealing unit 110 is formed on the first thermal paper 11. There is no difference (see FIG. 11). Therefore, in the present embodiment, the information concealment unit 110 is formed on the first thermal paper 11 by the following printing process.

  Next, details of the printing process in the thermal copying printer 1 in the fifth embodiment will be described. FIG. 26 is a flowchart showing print processing in the thermal copying printer 1 according to the fifth embodiment. In the present embodiment, the printing data stored in the RAM 33 is concealed area data indicating an area where black solid printing should be performed on the first thermal paper 11 in addition to the normal print data and the secret print data. Is included. The secret print data should be displayed on the second thermal paper 12 and the third thermal paper 13.

  As shown in FIG. 26, the printing process of the thermal copying printer 1 according to this embodiment is basically the same as that of the fourth embodiment (FIG. 22), but the secret print data included in the print data is changed. The third thermal paper 13 is also different in that it is printed. That is, if it is determined that there is secret print data (S91: YES), the third coloring energy (see FIG. 14) is applied to the thermal copying sheet 10 within the output range of the concealment area data (S93). Note that S81 to S91 and S95 to S99 in FIG. 26 are the same as S61 to S71 and S75 to S79 in FIG.

  Specifically, the thermal copy sheet 10 printed by the above printing process (FIG. 26) will be described. FIG. 27 is a diagram showing each thermal paper of the thermal copying sheet 10 before printing in the fifth embodiment. FIG. 28 is a diagram showing each thermal paper of the thermal copying sheet 10 after printing in the fifth embodiment. 27 and 28 show the thermal copying sheet 10 in a state in which each thermal paper is separated for easy understanding.

  As shown in FIG. 27, in the thermal copy sheet 10 before printing, as in the fourth embodiment (see FIG. 23), the first thermal paper corresponding to the secret information display unit 120 of the second thermal paper 12 is used. 11 is the information concealment part forming unit 116. Similarly to the second embodiment (see FIG. 15), the print target portion of the secret print data on the third thermal paper 13 corresponding to the secret information display unit 120 of the second thermal paper 12 is the secret information copy. Part 130.

  As shown in FIG. 28, the black solid information hiding section 110 is printed only on the first thermal paper 11 by applying the first coloring energy (S85) on the printed thermal copy sheet 10. Further, by applying the first coloring energy (S89), the text 111 indicating the normal print data is printed only on the first thermal paper 11. Also, by applying the third coloring energy (S93), the pass / fail result 121 indicating the secret print data is printed on the secret information display unit 120 of the second thermal paper 12, and the secret information copying unit 130 of the third thermal paper 13 is printed. The same pass / fail result 131 as the pass / fail result 121 is also printed. At the same time, the second coloring energy is also applied to the information concealing part forming unit 116 of the first thermal paper 11, but since the information concealing part 110 is formed in the information concealing part forming unit 116, the pass / fail result 121 is obtained. Do not show.

  As described above, in this embodiment, the information concealment unit 110 and the text 111 are printed on the first thermal paper 11 and printed on the second thermal paper 12 by a single printing operation on the thermal copying sheet 10 by the thermal copying printer 1. A pass / fail result 121 is printed, and a copy pass / fail result 131 is printed on the third thermal paper 13. Moreover, since the pass / fail result 121 cannot be known unless the first thermal paper 11 is peeled off, leakage of confidential information to a third party is prevented. Further, the user who is performing the printing operation can refer to the contents printed on the third thermal paper 13 that is the user confirmation sheet (copy pass / fail result 131) without removing the first thermal paper 11, 2 The print contents (pass / fail result 121) on the thermal paper 12 can be confirmed.

  As described above, according to the fifth embodiment, in the thermal copying printer 1, secret information is printed on the thermal copying sheet 10 in which the first thermal paper 11, the second thermal paper 12, and the third thermal paper 13 are superimposed. The third coloring energy is applied to the secret information display unit 120 of the second thermal paper 12 and the secret information copying unit 130 of the third thermal paper 13, and toward the information hiding part forming unit 116 of the first thermal paper 11. The information hiding unit 110 is printed by applying the first coloring energy. Therefore, even if the information hiding portion 110 is not formed in advance on the thermal copying sheet 10, different contents can be printed on the first thermal paper 11, the second thermal paper 12, and the third thermal paper 13, and The secret information printed on the second thermal paper 12 can be concealed. Furthermore, the information hiding unit 110 can be set at an arbitrary position. Further, by referring to the third thermal paper 13, it is possible to confirm the print contents of the second thermal paper 12.

  Incidentally, in the first to fifth embodiments, the first coloring energy (see FIG. 7) corresponds to the “coloring energy corresponding to the first energy amount” of the present invention, and the second coloring energy (FIG. 8). (See Fig. 14) corresponds to "coloring energy corresponding to the second energy amount" of the present invention, and the third coloring energy (see Fig. 14) corresponds to "coloring energy corresponding to the third energy amount" of the present invention. . The secret information display unit 120 of the second thermal paper corresponds to the “printing part of the second thermal paper” of the present invention, and the secret information copy unit 130 of the third thermal paper of the present invention “prints the third thermal paper” of the present invention. Corresponds to “part”. The thermal head 3 corresponds to “printing means” of the present invention.

  The present invention is not limited to the first to fifth embodiments, and various improvements and modifications can be made without departing from the scope of the present invention. For example, in the above-described embodiment, the “information hiding part” is a rectangular black solid printed part, but if the secret information behind it can be hidden, it can be any size or shape such as a circle or a star. It may be formed, or may be printed with a complicated mesh pattern.

  In the above embodiment, the thermal copying printer 1 and the thermal copying sheet 10 for monochrome printing are exemplified, but the present invention can be applied to color printing. In this case, the “information hiding portion” may not be a black printed portion, but may be a printed portion of another color. For example, if the color for printing the secret information is “red”, the secret information behind it can be concealed if the “information concealing unit” is a red solid print part.

  In the above embodiment, the thermal copying sheet 10 constituted by two or three thermal papers is exemplified, but the thermal copying sheet 10 constituted by four or more thermal papers may be used. For example, in the second or fifth embodiment, when the thermal copying printer 1 prints on the thermal copying sheet 10 made of five thermal papers, all of the five thermal papers can be colored based on the confidential information data. By applying various coloring energy, the third to fifth sheets may be used as a plurality of user confirmation sheets. In the third embodiment, when printing on the thermal copying sheet 10 made of five thermal papers with the thermal copying printer 1, an “information hiding part” is formed in advance on the fourth sheet, and the confidential information is printed. The first sheet to the third sheet may be used as a plurality of management storage sheets by applying coloring energy that can be developed by all the five thermal papers based on the data.

  In general, thermal paper tends to become saturated at a certain print density as the applied energy increases, and then the print density tends to decrease when the energy amount is excessive. Therefore, when printing the information hiding part on the thermal paper, it is desirable to adjust the amount of energy so that the applied energy applied to the thermal paper does not become excessive, or to combine thermal papers with different sensitivities.

  In the above embodiment, the “information hiding part” is printed on the thermal paper adjacent to the thermal paper on which the confidential information is printed in the thermal copying sheet 10. However, as long as the “information hiding unit” can hide the secret information printed behind it, each may be printed on thermal papers that are separated from each other. For example, the “information hiding part” is printed on the first sheet and the secret information is printed on the fourth sheet.

  In the above embodiment, only one “information hiding part” is formed in the thermal copying sheet 10, but a plurality of “information hiding parts” may be formed. For example, a plurality of “information hiding portions” may be formed on one thermal paper (for example, the first thermal paper) of the thermal copying sheet 10.

  Furthermore, “information hiding portions” may be provided at predetermined intervals on any of a plurality of thermal papers constituting the thermal copying sheet 10. For example, when printing on the thermal copying sheet 10 composed of six thermal papers with the thermal copying printer 1, an “information hiding portion” is formed in advance on the first, third, and fifth thermal papers, The same secret information can be simultaneously printed on the second, fourth, and sixth thermal papers by applying coloring energy that can develop colors on all six thermal papers based on the confidential information data. it can.

  Further, in the above-described embodiment, the thermal copying sheet 10 has a releasability and a re-adhesion preventing property for each thermal paper by a special adhesive. However, it is only necessary that the thermal copying sheet 10 has a plurality of thermal papers that can be peeled and can be peeled off, and the properties such as re-peelability and re-adhesion prevention property are not limited.

  The thermal copying sheet and the thermal copying printer of the present invention can be used for printing confidential information on a thermal copying sheet in which a plurality of thermal papers are detachably stacked.

1 is a schematic configuration diagram of a thermal copying printer 1. FIG. 1 is an external perspective view of a thermal copying sheet 10 in the first embodiment. FIG. FIG. 3 is an enlarged side cross-sectional view of the thermal copying sheet 10 according to the first embodiment. 1 is a block diagram of a thermal copying printer 1. FIG. FIG. 4 is a diagram showing a printing operation on the thermal copy sheet 10. 3 is a flowchart illustrating a printing process in the thermal copying printer 1 according to the first embodiment. FIG. 4 is a diagram showing energization pulses of first coloring energy supplied to the thermal head 3. FIG. 4 is a diagram showing energization pulses of second coloring energy supplied to the thermal head 3. It is a figure which shows each thermal paper of the thermal copying sheet 10 before printing in 1st Embodiment. It is a figure which shows each thermal paper of the thermal copying sheet 10 after printing in 1st Embodiment. It is an external appearance perspective view of the heat-sensitive copying sheet 10 in 2nd Embodiment. It is a side cross-sectional enlarged view of the thermal copying sheet 10 in the second embodiment. 10 is a flowchart illustrating a printing process in the thermal copying printer 1 according to the second embodiment. FIG. 4 is a diagram showing a current pulse of third coloring energy supplied to the thermal head 3. It is a figure which shows each thermal paper of the thermal copying sheet 10 before printing in 2nd Embodiment. It is a figure which shows each thermal paper of the thermal copying sheet 10 after printing in 2nd Embodiment. FIG. 10 is an external perspective view of a thermal copying sheet 10 according to a third embodiment. 10 is a flowchart illustrating a printing process in the thermal copying printer 1 according to the third embodiment. It is a figure which shows each thermal paper of the thermal copying sheet 10 before printing in 3rd Embodiment. It is a figure which shows each thermal paper of the thermal copying sheet 10 after printing in 3rd Embodiment. It is an external appearance perspective view of the thermal copying sheet 10 in 4th Embodiment. 10 is a flowchart illustrating a printing process in the thermal copying printer 1 according to the fourth embodiment. It is a figure which shows each thermal paper of the thermal copying sheet 10 before printing in 4th Embodiment. It is a figure which shows each thermal paper of the thermal copying sheet 10 after printing in 4th Embodiment. FIG. 10 is an external perspective view of a thermal copying sheet 10 in a fifth embodiment. 10 is a flowchart showing a printing process in the thermal copying printer 1 in the fifth embodiment. It is a figure which shows each thermal paper of the thermal copying sheet 10 before printing in 5th Embodiment. It is a figure which shows each thermal paper of the thermal copying sheet 10 after printing in 5th Embodiment.

DESCRIPTION OF SYMBOLS 1 Thermal copy printer 2 Paper feed side conveyance roller 3 Thermal head 4 Platen roller 5 Paper discharge side conveyance roller 10 Thermal copy sheet 11 First thermal paper 12 Second thermal paper 13 Third thermal paper 110 Information hiding part 111 Text 112 Confidential information Copy part 113 Reference number 114 Copy text 115 Copy pass / fail result 116 Information concealment part forming part 120 Confidential information display part 121 Pass / fail result 122 Information concealment part 123 Text 130 Secret information copy part 131 Copy pass / fail result 132 Secret information display part 133 Pass / fail result

Claims (6)

Using thermographic sheet common thermal paper that each laminated color layers on the mount are superimposed plurality peelably that develops color by a predetermined heat generation, opposed to the first thermal paper is one sheet of the thermal paper is applied coloring energy due to heat generation from a direction, a thermographic printer for printing at least the a first thermal paper and the second sheet of the thermosensitive paper second thermal paper,
When printing only on the first thermal paper , applying color development energy corresponding to the first energy amount that only the color development layer of the first thermal paper develops color, while printing on the second thermal paper A printing means for applying a coloring energy corresponding to a second energy amount that the coloring layers of both the first thermal paper and the second thermal paper are colored,
The printing means applies color development energy corresponding to the second energy amount to print on the second thermal paper, and at least includes the print portion of the second thermal paper. A thermal copying printer, wherein a coloring energy corresponding to an amount of energy is applied to print an information concealing unit on the first thermal paper for concealing the print contents on the second thermal paper. The printing means is a thermal head that applies the coloring energy in units of lines based on printing data indicating the contents to be printed on the thermal copying sheet,
A determination is made based on the print data whether there is concealment area data indicating an area on which the information concealment unit is printed in a print target line that is the line to which the coloring energy is applied by the printing unit. 1 judgment means,
When the first determination unit determines that the concealment area data is present, the information concealment unit is applied to the print target line by applying coloring energy corresponding to the first energy amount from the printing unit. First printing control means for printing;
Second determination means for determining whether there is secret print data to be displayed only on the second thermal paper in the print target line based on the print data;
When the second determination unit determines that the secret print data is present, the second energy amount from the printing unit corresponds to the second energy amount within the range of the information concealment unit printed by the first print control unit. The thermal copying printer according to claim 1, further comprising: a second print control unit that prints the secret print data on the print target line by applying the coloring energy. Using thermographic sheet common thermal paper that each laminated color layers on the mount are superimposed plurality peelably that develops color by a predetermined heat generation, opposed to the first thermal paper is one sheet of the thermal paper In order to print on at least the first thermal paper, the second thermal paper, which is the second thermal paper, and the third thermal paper, which is the third thermal paper, by applying coloring energy due to heat generation from the direction of The thermal copying printer of
In the case of printing only on the first thermal paper , a coloring energy corresponding to a first energy amount that only the coloring layer of the first thermal paper is colored is applied, and the second thermal paper and the third thermal paper are applied. The printing means for applying a coloring energy corresponding to a third energy amount for coloring all the coloring layers of the first thermal paper, the second thermal paper, and the third thermal paper,
The printing means applies coloring energy corresponding to the third energy amount to print the same print content on the second thermal paper and the third thermal paper, and at least the second thermal paper and the Information for concealing the print contents on the second thermal paper and the third thermal paper by applying coloring energy corresponding to the first energy amount to a range including each print site of the third thermal paper A thermal copying printer, wherein a concealing portion is printed on the first thermal paper. The printing means is a thermal head that applies the coloring energy in units of lines based on printing data indicating the contents to be printed on the thermal copying sheet,
A determination is made based on the print data whether there is concealment area data indicating an area on which the information concealment unit is printed in a print target line that is the line to which the coloring energy is applied by the printing unit. 1 judgment means,
When the first determination unit determines that the concealment area data is present, the information concealment unit is applied to the print target line by applying coloring energy corresponding to the first energy amount from the printing unit. First printing control means for printing;
Second determination means for determining whether there is secret print data to be displayed on the second thermal paper and the third thermal paper in the print target line, based on the print data;
When the second determination unit determines that the secret print data is present, it corresponds to the third energy amount from the printing unit within the range of the information concealment unit printed by the first print control unit. The thermal copying printer according to claim 3, further comprising: a second print control unit that prints the secret print data on the print target line by applying the coloring energy. Third determination means for determining whether there is normal print data to be displayed only on the first thermal paper in the print target line based on the print data;
When it is determined by the third determination means that the normal print data is present, the normal print data is applied to the print target line by applying a coloring energy corresponding to the first energy amount from the printing means. The thermal copy printer according to claim 2, further comprising a third print control unit that performs printing.   A thermal copying sheet printed by the thermal copying printer according to claim 1.

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