JP5249311B2 - Printing method - Google Patents

Description

  The present invention relates to a printing method and a packaging material.

Conventionally, information indicating an internal product, a manufacturer, or the like is printed on a packing material such as a cardboard for packing consumables such as toner and parts of the image forming apparatus.
In general, printing on the packaging material is performed by solid printing using a plate and ink, as shown in Patent Document 1, for example.

By the way, in recent years, even if it is the same product, it is sent to various destinations. And the content printed on a packing material may change with destinations.
Thus, when the contents printed on the packaging material are different, it is necessary to replace the plate for each print content, which increases the manufacturing cost of the plate and increases the work load.

JP 2010-76794 A JP-A-11-152117

In order to cope with the increase in manufacturing cost and the work load as described above, printing is performed on the packaging material by using laser printing (see Patent Document 2) that can change the printing contents only by changing the software. It has been proposed.
Specifically, it has been proposed to perform printing by irradiating the surface of the packaging material with laser light and melting or incinerating the surface layer of the packaging material with the laser light.

  However, a packing material for packing general parts including consumables and parts of the image forming apparatus does not have a metal foil as shown in Patent Document 2 because it is not necessary to insulate the internal space of the packing material. . For this reason, it has not been considered to apply the method shown in Patent Document 2 to a packing material for packing general parts.

  It can be considered that a plate for each destination is not required by directly irradiating a laser beam on a packing material for packing a general part to perform printing. In addition, it is conceivable to improve efficiency by performing laser printing in the production process, eliminating the need to create many types of printed matter. However, the printed content actually formed by directly irradiating the surface of the packaging material with laser light has a low contrast between the printed content and the surrounding area and is extremely poor in visibility. Further, laser printing has a problem that printing takes longer time than solid printing.

  The present invention has been made in view of the above-described problems, and improves the visibility of printing contents and the printing efficiency by printing a printing object such as a packing material by a combination of solid printing and laser printing. Objective.

  The present invention employs the following configuration as printing means for solving the above-described problems. Moreover, the packaging material which has the following characteristics for solving said subject is provided.

  A first invention is a printing method for performing printing on a printing object, wherein the surface of the printing object is under a background color having lightness or saturation lower than the ground color of the surface. Printing is performed by removing a part of the surface of the base layer or the base layer and the object to be printed by irradiating a laser beam to the base layer forming region and printing the base layer. The structure which has a laser printing process is employ | adopted.

  A second invention adopts a configuration in the first invention in which the printing object is a packaging material made of cardboard.

  A third invention adopts a configuration in which the base color is black in the second invention.

  According to a fourth invention, in any one of the first to third inventions, the laser printing step moves the printing object with respect to the laser irradiation unit fixedly arranged, and the print region is moved to the laser irradiation unit. A configuration is adopted in which the operation is performed in a state of being opposed to each other.

  In a fifth aspect based on the fourth aspect, when the printed object has a first print area and a second print area, the first print area is used as the laser irradiation means as the laser printing step. A configuration is adopted in which a first laser printing step of printing by arranging the two oppositely and a second laser printing step of printing by placing the second printing region opposite to the laser irradiation means are employed.

  According to a sixth invention, in the fifth invention, the printing object is a box having a bottom surface, a top surface, and a plurality of side surfaces, and printing is performed on the first printing region included in one of the side surfaces. The first laser printing step is performed, and then the second laser printing step of rotating the box body around the vertical axis to print the second printing region included in the other side surface is performed. The configuration is adopted.

  In a seventh aspect of the invention, in the first to third aspects of the invention, when the print object has a first print area and a second print area, the first printing is performed in the laser printing step. A configuration is adopted in which printing is performed in a state in which laser irradiation means fixedly arranged with respect to each of the area and the second printing area are arranged to face each other.

  According to an eighth aspect of the present invention, in any one of the first to seventh aspects, the orientation of the formation region of the foundation layer when viewed from a direction orthogonal to the surface of the print object in the foundation layer printing step. A configuration is employed in which a mark to be printed is printed, and in the laser printing step, the orientation of the formation region of the base layer is detected from the mark to perform printing.

  According to a ninth invention, in any one of the first to eighth inventions, a change portion in which a print content to be printed on the print object differs depending on the print object, and a fixed portion that does not change depending on the print object. In the base layer forming step, the base layer of the changed portion and the printed content of the fixed portion are printed, and the printed content of the changed portion is printed in the laser printing step. Adopt the configuration.

  In a tenth aspect of the present invention, in any one of the first to ninth aspects, the laser printing process is performed in accordance with a production process of a part integrated with the print object.

  An eleventh invention is a packing material for packing a toner cartridge having a toner container filled with toner used in an image forming apparatus according to the tenth invention. A configuration is adopted in which it is performed in accordance with the production process of filling the toner container with toner.

  A twelfth invention is a packing material that accommodates an object to be packed, and is formed on the surface and has a ground layer of a ground color having a lightness or a saturation lower than the ground color of the surface, and the ground layer Or the structure of having the laser printing area | region formed by removing the said base layer and a part of said surface is employ | adopted.

  The thirteenth invention adopts a configuration in which it is made of cardboard in the twelfth invention.

  A fourteenth aspect of the present invention is the twelfth aspect of the present invention, wherein a plurality of the items to be packed can be stored, has a box shape having a bottom surface, a top surface, and a plurality of side surfaces, and at least one of the plurality of side surfaces. A configuration in which the base layer and the laser printing region are provided on one surface is adopted.

  A fifteenth invention adopts a configuration according to the fourteenth invention, wherein the plurality of side surfaces have side surfaces facing each other, and the foundation layer and the laser printing region are formed on the side surfaces facing each other. .

According to the present invention, a ground layer having a ground color whose brightness or saturation is lower than the ground color of the surface of the printing object is printed on the surface of the printing object, and a laser is applied to the area where the ground layer is printed. Laser printing is performed by irradiating light.
Here, the color of the print content (characters, graphics, etc.) drawn by laser printing is the same or close to the ground color of the surface of the print object. For this reason, according to the present invention, there is a large difference in at least one of the brightness and saturation between the printed content by laser printing and its surroundings, and as a result, the printed content drawn by laser printing can be made clear. .
Therefore, according to this invention, it becomes possible to improve the visibility of the printing content at the time of printing by laser printing with respect to printing objects, such as a packaging material.
Further, according to the present invention, in the packaging material that accommodates an object to be packaged, a base layer of a base color that is formed on the surface and has a lightness or saturation that is lower than the ground color of the surface; A laser printing region formed by removing a part of the surface of the base layer or the base layer and the packing material. Therefore, it is not necessary to make and exchange printing plates for each destination.

It is a top view which shows a part of packing material with which the predetermined printing content predetermined by the printing method in one Embodiment of this invention was printed. It is explanatory drawing which shows the process of the solid printing in the printing method in one Embodiment of this invention. It is explanatory drawing which shows the process of the laser printing in the printing method in one Embodiment of this invention. It is a photograph for confirming the visibility of the printed content printed by the printing method in one embodiment of the present invention. It is explanatory drawing which shows typically the basic composition of the laser printing apparatus by the printing method in one Embodiment of this invention. (A) is a structure which prints on a horizontal surface, (b) is a structure which prints on a vertical surface. It is explanatory drawing which shows typically another basic structure of the laser printing apparatus by the printing method in one Embodiment of this invention. (A) is a structure which prints on a horizontal surface, (b) is a structure which prints on a vertical surface. FIG. 6 is an explanatory diagram illustrating a configuration for carrying out the printing method of the present invention in a toner cartridge production process. It is explanatory drawing which shows the packing material in one Embodiment of this invention. (A) is an individually packaged material for storing the toner cartridge. (B) is a packing material for an outer box for storing a plurality of individually packaged products containing toner cartridges.

Hereinafter, an embodiment of a printing method according to the present invention will be described with reference to the drawings. In the following drawings, the scale of each member is appropriately changed in order to make each member a recognizable size.
Note that the printing contents in the following description are merely examples, and it is of course possible to apply the printing method of the present invention when printing other printing contents.

FIG. 1 is a plan view showing a part of a packing material on which a predetermined printing content predetermined by the printing method of the present embodiment is printed.
As shown in this figure, in the printing method of the present embodiment, a logo mark 2, a base 3, a product model number 4, a caution note 5, and a barcode 6 are applied to the surface of the packaging material 1 made of cardboard. A posture detection mark 7 (mark) is printed.
The posture detection mark 7 indicates the posture of the foundation 3 (formation region of the foundation layer) when viewed from a direction orthogonal to the surface of the packaging material 1.

Among the above-mentioned print contents, the product model number 4 and the barcode 6 are changing portions that change depending on the destination of the product (packaged item) packed by the packing material 1.
On the other hand, among the above-described print contents, the logo mark 2, the ground 3, the cautionary note 5, and the posture detection mark 7 are fixed portions that do not change depending on the destination of the product packed with the packing material 1. .

  In the printing method according to the present embodiment, the product model number 4 and the barcode 6 that are changed portions are printed by laser printing, and the logo mark 2 that is a fixed portion, the base 3, the cautionary note 5, and the posture detection mark. 7 is printed by solid printing using ink and a plate.

  Laser printing requires a longer time for printing than solid printing. For this reason, the content printed by laser printing, that is, the product model number 4 has a predetermined printing time for each packing material 1 (for example, within the tact time required for work on the packaged item). The design has been devised to shorten the printing time.

First, at present, the range that can be printed at one time without moving the laser irradiation head in one laser irradiation head provided in the laser printing apparatus is a range of 300 mm × 300 mm.
For this reason, in this embodiment, the product model number 4 is set to an overall size so as to be within a range of 300 mm × 300 mm.

Further, a laser irradiation head (laser irradiation means) provided in the laser printing apparatus performs printing while scanning a laser beam in the horizontal direction when printing a range that can be printed at a time. At this time, in one scanning line, there are a region irradiated with laser light and a region not irradiated depending on the design of the print content. If it is assumed that the laser beam irradiation distance in one scanning line is the same, the printing time for one scanning line is shortened when the laser beam irradiation ranges are arranged as much as possible.
For this reason, in the present embodiment, the layout of the laser light irradiation position in laser printing (that is, the design of the product model number 4) is set so that the laser light irradiation range is gathered as much as possible.

In addition, the printing time for one scanning line is shortened as the number of regions irradiated with laser light in one scanning line is small.
For this reason, in this embodiment, the product model number 4 is set to a hatched design so that the range in which the laser beam is irradiated is as small as possible.

  In other words, in the printing method of the present embodiment, the design (size, character layout, and character design) of the product model number 4 that is the changed portion and the size of the barcode 6 are determined in advance for printing on the packaging material 1. It is set based on time.

Next, with reference to FIGS. 2 and 3, the printing method of the present embodiment will be described in more detail in time series.
2 and 3, (a) is a plan view of the packing material 1 as viewed from a direction orthogonal to the surface, and (b) is a cross section schematically showing a cross section taken along line AA of (a). FIG.

In the printing method of the present embodiment, first, as shown in FIG. 2, solid printing is performed on the packing material 1.
In this solid printing, the logo mark 2, which is a fixed portion, the base 3, the note 5, and the posture detection mark 7 are printed.

In the printing method of the present embodiment, black ink having a lightness lower than the ground color of the packing material 1 and a high saturation is selected as the ink used in the solid printing.
For this reason, as shown in FIG. 2B, in the region where laser printing is performed (that is, the region where the base 3 is printed), the brightness of the surface of the packaging material 1 is higher than the ground color of the surface. The black base layer 3a having low and high saturation is formed by printing.
In other words, in the printing method of the present embodiment, the step of performing solid printing is a ground layer of a ground color having a lightness or saturation higher than the ground color of the surface of the printing object in the present invention. This corresponds to the underlayer printing process for printing.

  Subsequently, in the printing method of the present embodiment, the base 3 (formation region of the base layer 3a) is irradiated with a laser beam so that a part of the base layer 3a (or the surface of the base layer 3a and the packaging material 1) is exposed. By removing by melting or incineration, the product model number 4 and the barcode 6 are printed as shown in FIG. 3 (laser printing process).

Laser printing is performed by a laser printing apparatus. This laser printing apparatus includes a head for emitting laser light and a sensor for detecting a posture detection mark 7 formed on the packing material 1.
Then, the laser printing apparatus detects the position of the posture detection mark 7 formed on the packing material 1 by the sensor, and detects the posture of the base 3 (the posture of the formation region of the base layer 3a) from the detection result. Thereafter, the laser printing apparatus prints the product model number 4 at an accurate position on the base 3 by adjusting the positional relationship between the head and the packing material 1 and the irradiation position of the laser light from the detected attitude of the base 3. .

According to the printing method of the present embodiment as described above, the black base layer 3a having a lightness lower than the ground color of the surface of the packaging material 1 and a high saturation is printed on the surface of the packaging material 1, and this base layer Laser printing is performed by irradiating a laser beam onto the area on which 3a is printed.
Here, the color of the printed content (that is, product model number 4) drawn by laser printing is the same color as or close to the ground color of the surface of the packaging material 1.

FIG. 4A is a photograph in which laser printing is performed without forming the base layer 3 a on the surface of the packaging material 1. FIG. 4B is a photograph in which laser printing is performed after the base layer 3a is formed on the surface of the packaging material 1. FIG.
According to the printing method of the present embodiment, there is a large difference in the brightness and saturation between the print contents by laser printing and the surroundings. As a result, the product model number 4 drawn by laser printing is shown in FIG. Can be made clear.
Therefore, according to the printing method of this embodiment, it becomes possible to improve the visibility of the printed content when printing is performed on the packaging material 1 by laser printing.

Moreover, in the printing method of this embodiment, the printing target object of this invention is the packaging material 1 which consists of corrugated cardboard.
As shown in FIG. 4A, in the packaging material 1 in which the printing object is made of corrugated cardboard, the visibility of the printed content is particularly poor when laser printing is performed without forming the base layer 3a.
According to the present invention, even when the packaging material 1 made of cardboard is printed by laser printing, as shown in FIG. it can.

In the printing method of the present embodiment, the base color that is the color of the base layer 3a is black.
Since the ground color of the packaging material 1 made of corrugated cardboard is a color close to white, it is possible to improve the visibility of the printed content by laser printing in particular by setting the base color to black.

In the printing method of the present embodiment, the posture detection mark 7 indicating the posture of the formation region of the base layer 3a is printed by solid printing, and the base layer 3a is printed from the posture detection mark 7 during laser printing. Printing is performed by detecting the posture of the formation area.
For this reason, the product model number 4 can be printed at an accurate position on the base 3.

Moreover, in the printing method of this embodiment, the printing content printed with respect to the packing material 1 changes the change part which changes with the destination of the packing material 1, etc., and the fixed part which does not change with the destination of the packing material 1, etc. In addition, the base layer 3a of the changed portion and the printed content of the fixed portion are printed by solid printing, and the printed content of the changed portion is printed by laser printing.
In other words, in the printing method of the present embodiment, printing contents that do not need to change the pattern for solid printing are printed by solid printing, and printing contents that require a change of type in solid printing are printed by laser printing. ing.
For this reason, according to the printing method of the present embodiment, it is possible to minimize the number of printing portions by laser printing that do not require a change of the mold and that requires more printing time than solid printing, and increase the printing time. The printing cost can be reduced while suppressing.

Furthermore, in the printing method of the present embodiment, the size of the product model number 4 that is the changed portion and the layout of the irradiation position of the laser light when the product model number 4 is printed are based on a predetermined tact time. Is set.
For this reason, in spite of performing laser printing, the tact time for printing on the packing material 1 can be suppressed to the same level as when only conventional solid printing is used.

  Next, the laser printing apparatus and the printing method (laser printing process) using the laser printing apparatus will be described in more detail with reference to FIGS. However, the printing contents shown in FIGS. 5 to 8 below are simplified as appropriate in order to improve the visibility in the drawings.

FIG. 5 is an explanatory diagram schematically showing a basic configuration of a laser printing apparatus according to a printing method according to an embodiment of the present invention. (A) is a structure which prints on a horizontal surface, (b) is a structure which prints on a vertical surface.
The laser printing apparatus 10 includes a support base 11 for positioning and instructing a print target, and a laser irradiation head 12 for irradiating the surface of the print target 13 supported by the support base 11 with laser light.

  In the configuration of FIG. 5A, the support base 11 supports the printing object 13 on a horizontal support surface in a state where the end surface 13a is in contact with a positioning means or the like. The laser irradiation head 12 is fixedly disposed above the support surface of the support base 11. Then, printing is performed by irradiating the upper surface 13b (horizontal plane) of the print target 13 placed on the support base 11 with laser light in accordance with the print data within the range of the irradiation area 14 indicated by the dotted line. This configuration is suitable when printing on a relatively small plate-like member or packing box. The print object can be positioned simply by placing it on the support surface, and the print object can be easily supported with a simple configuration.

  The configuration of FIG. 5B is a configuration suitable for printing on a relatively large packing material (a box having a bottom surface, a top surface, and a plurality of side surfaces). In this configuration, the support base 11 supports the box-shaped print target 13 on the support surface in a state where the side surface 13c is in contact with a positioning means or the like. The laser irradiation head 12 is fixedly disposed on the side of the printing object 13 facing the side surface 13c (vertical surface) standing vertically. Then, printing is performed by irradiating the side surface 13c of the print target 13 placed on the support base 11 with laser light according to the print data.

In addition, by making the support base 11 rotatable, it is possible to print on a plurality of side surfaces by switching the side surface facing the laser irradiation head 12 by rotating the printing object 13 around the vertical axis. is there. Without enlarging the support base 11, laser printing on a large print object can be performed with a simple configuration in a limited space.
That is, in this configuration, the printing object 13 is moved with respect to the fixedly arranged laser irradiation head 12, and laser printing is performed in a state where the region to be laser-printed (printing region) is arranged opposite to the laser irradiation head 12. Is called.
Further, in this configuration, the printed object 13 has a plurality of print areas (first print area and second print area), and the first print area included in the first side surface is provided to the laser irradiation head 12. The laser printing is performed by arranging the lasers so as to face each other (the first laser printing process), and then the second printing region included in the second side face is arranged so as to face the laser irradiation device 12 and the laser printing is performed (the second laser). Printing process).

  FIG. 6 is an explanatory diagram schematically showing another basic configuration of the laser printing apparatus according to the printing method according to the embodiment of the present invention. (A) is a structure which prints on a horizontal surface, (b) is a structure which prints on a vertical surface.

  In the configuration of FIG. 6A, the two laser irradiation heads 12 are fixedly disposed above the support surface of the support table 11. Thereby, it is possible to perform laser printing in one laser printing process without being limited to the range of the irradiation region 14 of one laser irradiation head. Further, in the apparatus of one laser irradiation head 12 as shown in FIG. 5A, a structure in which a plurality of laser printing steps are continuously performed as a structure in which the support base 11 can be moved is also possible.

In the configuration of FIG. 6B, the laser irradiation head 12 is fixedly disposed on each side of two side surfaces 13 c 1 and 13 c 2 that face the print target 13 in the vertical direction. Accordingly, it is possible to perform laser printing on the two side surfaces 13c1 and 13c2 in one laser printing process.
In other words, in the present configuration, the printed object 13 has a plurality of print areas (first print area and second print area), and the first print area and the second side included in the first side face. Laser printing is performed in a state where the laser irradiation heads 12 fixedly arranged with respect to each of the included second printing regions are arranged to face each other.

  Further, in combination with the configuration in which the support base 11 shown in FIG. 5B rotates, it is also possible to perform laser printing on all four side surfaces 13c in two laser printing steps.

  As described above, the laser printing time can be shortened by the configuration in which a plurality of laser irradiation heads shown in FIGS. 6A and 6B are provided.

  FIG. 7 is an explanatory diagram schematically showing a configuration for carrying out the printing method of the present invention in the toner cartridge production process. The toner cartridge 30 (see FIG. 8A) is used in the image forming apparatus. As shown in FIG. 7, in the production process of the toner cartridge 30, a process of filling the toner container 20 with toner, and a process of individually packing the toner cartridge 30 having the toner container filled with toner with the packing material 21. There are processes such as shipment packing for storing a plurality of individually packed toner cartridges 30 in a packing box 22 for shipping.

  In this production process, the laser printing means of the present invention is used for printing the packing material 21 and the packing box 22. In parallel with the step of filling the toner container 20 with toner, a printing process for individual packaging for performing laser printing on the packing material 21 is provided. Then, on the downstream side of the production line, an individual packaging process is performed in which the toner cartridge 30 having the toner container 20 filled with toner is stored in the laser-printed packaging material 21. Further, on the downstream side, a process of shipping packing is performed in which nine individually packed toner cartridges 30 are collected and stored in the packing box 22. Further, a shipping packing printing process is performed in which laser printing is performed on the packing box 22 in a state where the toner cartridge 30 is packed.

  Here, the tact time of the production process of the toner cartridge 30 is set to the time required for the process of filling the toner container 20 with toner. Therefore, it is necessary to print the individual packaging within this tact time. Further, it is necessary to print the shipping packaging within 9 tact times until the next shipping packaging operation is completed. 5A or 6A is used for printing individual packaging, and the laser shown in FIG. 5B or 6B is used for printing shipping packaging. Laser printing within the tact time can be performed by performing laser printing shown in FIG. 3 using the printing configuration.

  FIG. 8 is an explanatory view showing a packing material in one embodiment of the present invention. (A) is an individually packaged material for storing the toner cartridge 30 (packaged object). (B) is a packing material for an outer box for storing a plurality of individually packaged items (packaged items) in which the toner cartridges 30 are stored.

  In FIG. 8A, the packing material 31 is for packing the toner cartridges 30 individually. On the packing material 31, on the two adjacent side surfaces 31a and 31b, the product model number 31d or the product model number 31d and the barcode 31e are printed by laser printing in the area of the solid print 31c. Thereby, it is possible to create a packaging box without creating a printing plate for each product corresponding to the destination. In addition to the product model number 31d and the barcode 31e, it is also easy to add and print information as necessary.

  A packing box 32 shown in FIG. 8B is used for packing a plurality of individually packed toner cartridges 30 for shipping. A product model number 32b and a bar code 32c are laser-printed on each of the four side surfaces of the packing box 32 by laser printing on a solid-printed region 32a. Although the packing box 32 has a relatively large shape, the product model number 32b and the like are printed on a plurality of surfaces, so that it can be easily identified.

  The packaging material 31 and the packaging box 32 according to this embodiment are formed on the surface and have a ground layer of a ground color whose brightness is lower than the ground color of the surface or whose saturation is high, and a ground layer or a ground layer And a laser printing region formed by removing a part of the surface.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the spirit of the present invention.

For example, in the above embodiment, the configuration in which the printing object of the present invention is the packaging material 1 made of cardboard has been described.
However, the present invention is not limited to this, and it is possible to use a packaging material in which the printing object does not depend on corrugated cardboard, and it is also possible to adopt a configuration in which the printing object is not a packaging material.

Moreover, in the said embodiment, the structure whose base color in this invention is black was demonstrated.
However, the present invention is not limited to this, and it is possible to use a background color having a lightness or a saturation higher than the ground color of the surface of the packaging material 1, even if the background color is green or purple. good.

Further, in the above-described embodiment, the configuration in which the posture detection mark 7 is printed at the time of solid printing has been described.
The shape and arrangement of the posture detection mark 7 are merely examples, and the present invention is not limited to this.

  Moreover, in the said embodiment, although only one surface of the packaging material 1 is illustrated, the packaging material used for the components etc. of an image forming apparatus has a box shape normally. For this reason, the printing of the whole surface of a packing material can be printed with the printing method of this invention by printing on each surface of a packing material with the printing method of this invention.

  1 …… Packaging material (printed object) 2 …… Logo mark 3 …… Base 3a… Base layer 4 …… Product model number 5 …… Precautionary note 6 …… Bar code 7… Attitude Detection mark (mark)

Claims (7)

A printing method for printing on a print object,
A base layer printing step of performing solid printing using a plate and ink on a base layer of a black base color whose brightness is lower than the ground color of the surface on the surface of the packaging material made of corrugated cardboard which is the printing object; ,
A laser printing step of performing printing by irradiating the formation region of the base layer with laser light to remove a part of the surface of the base layer or the base layer and the print object, and
The laser printing step is performed in a state in which the printing object is moved with respect to the laser irradiation unit that is fixedly arranged, and a print region is arranged opposite to the laser irradiation unit,
Print content to be printed to the printing object, seen containing a different change portions by the printing target, and a fixed portion that does not vary with the printing object,
In the underlayer forming step, the underlayer of the change portion and the print content of the fixed portion are solid-printed,
In the laser printing step, the printing content of the changed portion is printed on the printing object on which the printing content of the base layer and the fixed portion is printed.   When the printed object has a first printing area and a second printing area, as the laser printing process, a first laser printing process for printing the first printing area facing the laser irradiation unit; 2. The printing method according to claim 1, wherein a second laser printing step is subsequently performed in which the second printing area is printed so as to face the laser irradiation unit.   The printing object is a box having a bottom surface, a top surface, and a plurality of side surfaces, and performs the first laser printing step of printing on the first printing region included in one of the side surfaces, and subsequently 3. The printing method according to claim 2, wherein the second laser printing process is performed in which the box body is rotated about a vertical axis to perform printing on the second printing region included in another side surface. .   In the case where the print object has a first print area and a second print area, a laser fixedly arranged with respect to each of the first print area and the second print area in the laser printing step. The printing method according to claim 1, wherein printing is performed in a state where the irradiating units are arranged to face each other. In the foundation layer printing step, print a mark indicating the orientation of the formation area of the foundation layer when viewed from a direction orthogonal to the surface of the print object,
5. The printing method according to claim 1, wherein in the laser printing step, printing is performed by detecting a posture of a formation region of the base layer from the mark.   The printing method according to claim 1, wherein the laser printing process is performed in accordance with a production process of a part integrated with the printing object.   The object to be printed is a packing material for packing a toner cartridge having a toner container filled with toner used in an image forming apparatus, and the laser printing process is performed in accordance with a production process for filling the toner container with toner. The printing method according to claim 6, wherein: