JPH0227153B2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a method for printing bags.

<Prior art> Conventionally, as shown in Fig. 3, the method of printing bags is to insert an under plate made of a single plate-like piece into a bag, and print the front and back planes of the under plate. A widely used method is to screen print the surface of the bag that corresponds to the support surface of the bag.

<Problems to be Solved by the Invention> However, in this method, since both the left and right sides of the under plate are only flat surfaces corresponding to the thickness of the plate, screen printing cannot be performed on the portions corresponding to these portions. Furthermore, even if both the left and right sides are made wide, screen printing cannot be performed on the corners between the front surface C and the side surface D.

As a result, the printed bag (A) has a problem in that it has unprinted vertical stripes (E) in a portion corresponding to the front surface (C) and the back surface (D).

<Means for Solving the Problems> The present invention solves the above problems by providing a method for printing bags having the following features.

When inserting an underplate into a bag and printing on the surface of the bag corresponding to the planar support surface of the underplate, the underplate of the present invention has a cylindrical shape, and this cylindrical underplate has its axis. The cylindrical underplate is divided into a plurality of side plate pieces each having a flat support surface on the surface thereof, and two adjacent side plate pieces are provided with a plurality of side plate pieces having a flat support surface on their surfaces. It is made to be able to be bent from one state to the other side so as to form a predetermined angle,
After inserting this cylindrical underplate into the bag, a suitable side plate piece of the underplate,
A continuous planar support surface is formed by adjacent side plate pieces, and a flat screen print is performed on the surface of the bag corresponding to this planar support surface.
Thereafter, one side plate piece and the other adjacent side plate piece are made flush with each other to form a continuous planar support surface, and the printed surface of the bag corresponding to this planar support surface is printed. By flat screen printing on the areas that are not covered, flat screen printing is performed continuously on the entire circumference of the bag surface.

<Function> In the present invention, the underplate used for printing is configured as follows.

The underplate is formed into a cylindrical body, and this cylindrical underplate has a plurality of bent parts along the axial direction, and these bent parts form a planar support surface on the surface of the cylindrical underplate. It is divided into a plurality of side plate pieces having a plurality of side plate pieces, and two side plate pieces adjacent to each other can be freely bent from a flush state to a direction toward the back side of each other so as to form a predetermined angle.

By using this underplate, when printing, first, one appropriate side plate piece and one side plate piece adjacent to this are brought into a flush state to form a continuous planar support surface. Then, flat screen printing is performed on the bag surface corresponding to this planar support surface. Next, the one side plate piece and the other adjacent side plate piece are flush with each other to form a continuous planar support surface. At this time, this planar support surface formed later includes a portion that overlaps with the support surface formed earlier. Therefore, since the surface of the bag corresponding to the overlapping portion on the supporting surface formed later has already been printed, it is possible to easily continue printing from this printed portion.

<Example> Hereinafter, an example of the method for printing bags of the present invention will be described based on the attached FIGS. 1 and 2.

1 shows an underplate used in the method of the invention and inserted into the bag 2. This underplate 1 is formed into a cylindrical body. The underplate is provided with a plurality of bent portions along the axial direction, and these bent portions divide the underplate into a plurality of side plate pieces each having a flat support surface on the surface, and two side plate pieces adjacent to each other are However, they are bendable from a flush state to form a predetermined angle toward the back side of each other. In this embodiment, four flat plates are connected by adhesive tapes 3...3, and the adhesive tapes 3...3 are used as bent parts.
It is made up of four planar side plate pieces.

With these side plate pieces, the under plate 1 is formed into a square prism cylindrical body with the side plate pieces adjacent to each other bent.
(Figures 1 and 2).

To perform flat screen printing using this under plate 1, after inserting it into the bag 2, first extend the top and bottom of the side plate pieces so that they are flush with each other, and then create a continuous planar support. Form a surface, and fold and, respectively, so that , is under , and is under . Then, as shown in FIG. 1, a print pattern 4 is printed on the surface of the bag 2 corresponding to the planar support surface formed by the dowel, and the first printing is performed. Reference numeral 5 indicates a cylindrical elastic sheet made of rubber that is coated on the surface of the underplate 1, so that the seam between the underplate 1 and the underplate 1 does not appear during the first printing. Next, in this state, it is turned over and a second printing is performed on the planar support surface formed by the edges of the side plate pieces of the underplate 1.

Next, and are bent, respectively, and are stretched out so that they are flush with each other to form a continuous planar support surface. Then, a third printing is performed on the surface of the bag corresponding to the planar support surface formed in and. At this time, since this planar support surface overlaps with the support surface used in the first and second printing, both ends thereof have already been printed. Therefore, it is only necessary to print on the central portion that has not been printed yet, and it is possible to easily print continuously on the previously printed portion.

Finally, by turning this state over and printing in the same manner on the flat supporting surface formed by the dots, a printed pattern 4 can be formed around the entire circumference of the bag 2, as shown in FIG. .

By printing as above, bag 2
It is possible to print continuously over the entire circumference of the surface, and it is possible to prevent the occurrence of vertical streaks that are not printed as in the conventional method.

<Effects of the Invention> As described above in the embodiments, the bag printing method of the present invention first involves making one appropriate side plate piece of the underplate flush with the adjacent side plate piece. to form a continuous planar support surface, and print on the bag surface corresponding to this support surface. Thereafter, one side plate piece and the other adjacent side plate piece are flush with each other to form a planar supporting surface, and printing is performed on the surface of the bag corresponding to this supporting surface.

By doing so, it is possible to include an overlapping portion between the supporting surface formed earlier and the supporting surface formed later, and it is possible to easily print continuously from the previously printed portion.

Therefore, it is possible to prevent the occurrence of unprinted vertical stripes between the first printed part and the second printed part as in the conventional case, and it is possible to obtain a product with excellent aesthetic appearance.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the process of printing the front side using the method of the present invention, Fig. 2 is a perspective view showing the process of printing the left and right sides, and Fig. 3 is a perspective view showing the conventional example. It is a diagram. In the diagram: 1... under plate, 2... bag, 4,
4...Printed pattern, 5...Tubular elastic sheet.

Claims (1)

[Claims] 1. In a method of inserting an underplate into a bag and printing on the surface of the bag corresponding to the flat support surface of the underplate, the underplate has a cylindrical shape, and the cylindrical The underplate has a plurality of bent portions along its axial direction, and these bent portions divide the cylindrical underplate into a plurality of side plate pieces each having a flat support surface on the surface. The side plate pieces are made so that they can be bent toward the back side of each other so that they form a predetermined angle from being flush with each other,
After inserting this cylindrical underplate into the bag, a suitable side plate piece of the underplate,
A continuous planar support surface is formed by adjacent side plate pieces, and a flat screen print is performed on the surface of the bag corresponding to this planar support surface.
Thereafter, one side plate piece and the other adjacent side plate piece are made flush with each other to form a continuous planar support surface, and the printed surface of the bag corresponding to this planar support surface is printed. A printing method for bags, characterized in that flat screen printing is performed continuously on the entire circumference of the bag surface by flat screen printing on the areas that are not covered. 2. The cylindrical underplate is composed of four side plate pieces, and the side plate pieces adjacent to each other are bent to form a square tube shape, and this underplate is used to print on the surface of the bag. A method for printing bags according to claim 1, characterized in that: 3. Claim 1, characterized in that the outer peripheral surface of the cylindrical underplate is covered with a cylindrical elastic sheet, and the covered underplate is inserted into a bag to print on the surface of the bag. Or the method for printing bags as described in paragraph 2.