JPH0872883A - Can with printed code mark and its printing method - Google Patents

Abstract

PURPOSE: To provide a can wherein a code mark is printed on the outer periphery of the seam part of its lid by ink jet, and provide its printing method. CONSTITUTION: At least a code mark 7 concerning the manufacture of a can 2 is printed on the outer periphery of the seam part of a can lid 3 around the edge of one end of the necked-in can 2 of a can 1. As for the code mark printing method, at least the code mark 7 concerning the manufacture of the can 2 is printed on the outer periphery 4 of the seam part by ink jet after seaming the can lid 3 around the edge of one end of the can 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can body on which a code mark such as a date of manufacture, a manufacturing line name, etc. is printed and a printing method thereof.

[0002]

2. Description of the Related Art In canned products, the date of manufacture and the like are generally displayed on the can body in order to know the expiration date of the contents.

Further, for a can body manufacturer, in the case of occurrence of any trouble caused by the can body, in order to investigate the cause and collect the product, the manufacturing date of the can body and the production line. It is common practice to display such items on a can.

For example, as shown in FIG. 4 (a), in the case of soft drinks containing cans, the can manufacturing company and the can manufacturing company respectively supply the manufacturing date of the can itself or the filling date of the contents to the can lid. May be printed on the surface.

However, in this case, since there are two kinds of dates, if they are indicated on the surface of the can lid, the person handling the product cannot distinguish both, including general consumers. , Would be confusing.

In view of this, in Japanese Patent Laid-Open No. 2-37308, a code mark relating to a can is printed on the surface of a can lid with transparent ink, and a fluorescent agent is applied to this to radiate ultraviolet rays to identify the code mark. Is proposed.

However, in this case, a special solvent such as a transparent ink or a fluorescent agent or an apparatus for applying the same is required, which is disadvantageous in terms of cost and man-hours.

Further, when the code mark printed by the manufacturer of the soft drink or the like is superimposed on the transparent ink, it is difficult to identify the code mark related to the manufacturing of the can body.

In Japanese Unexamined Patent Publication No. 6-156503, as shown in FIG. 4 (b), a code mark of the can body itself is formed by ink jetting on a portion of the can body of a three-piece can that is not decorative printed on the weld seam. It is proposed that the code mark of the canned product and the code mark of the can body be distinguished by printing the above and applying a transparent paint on it.

However, in this case, since the outer peripheral surface of the can body is printed by ink jet, there is a possibility that the print part may be faint when the printed part comes into contact with another can body. Therefore, the printed part is coated with a transparent paint. Was necessary, which was disadvantageous in terms of cost and man-hours.

Further, since the printing position of the code mark needs to be accurately aligned with the portion where the decorative printing is not applied, the can body does not rotate in the circumferential direction after welding on the welding line in the circumferential direction. As described above, it is necessary to perform printing in the process of holding and transporting the code, and for positioning in the traveling direction, it is necessary to print the code mark so that the code mark fits in a predetermined position between the front end and the rear end of the can body.

Further, in this case, since the code mark is printed before the can lid is tightened, only the information about the manufacturing of the can body can be printed, and the information on the can body and the can body and the can body are tightened. There was the inconvenience that the time information could not be printed.

On the other hand, it has been practiced to separately display the code mark of the canned product and the code mark of the can body itself.

For example, as shown in FIG. 4 (c), the code mark of the canned product is printed on the can lid portion, and the code mark of the can body itself is the outer circumference of the can body or the winding portion of the can body and the can body. Was stamped on.

However, the marking on the outer surface of the can body not only damages the printed surface, but also causes rusting of the outer surface when the body material of the can is a plated steel plate. In addition, the inner coating is destroyed by the inward protrusion due to engraving, which causes the elution of metal, and when engraving on the outer periphery of the winding part, if the can lid material is a plated steel plate, the plating layer is scratched. Problems such as rusting due to attachment will occur.

Further, since the surface of the can lid winding portion is engraved on the outer circumference of the can lid winding portion, and when the engraving is applied to the easy-open can lid of a beverage can, the engraved mark may be formed on the mouth of the can. May cause discomfort when drinking.

Further, according to the marking, if the marking is performed too strongly on the outer periphery of the winding portion of the can lid, burrs are generated, so that the marking cannot be performed so strongly that information may be unclear.

Further, in the case of engraving, it is necessary to change the punch for engraving in order to change the information to be engraved, which takes time and labor, so that only the manufacturing line with few changes has been engraved.

However, in recent years, Stein tab type easy open can lids are often used in beverage cans, but in this case, the quality of openness is emphasized,
The need for quality control is strongly demanded.

For example, when a problem such as a defective opening occurs, it is necessary to review the processing of the score for opening and the like, so that it is necessary to manage more information than the conventional can lid that is not easy open. However, it is difficult to display too much information by engraving the information.

[0021]

SUMMARY OF THE INVENTION The present invention aims to improve a can body having a code mark and a method of displaying the code mark relating to the manufacture of the can body. More specifically, in order to eliminate the above-mentioned inconvenience, An object of the present invention is to provide a can body in which a code mark is printed on the outer circumference of a winding portion by ink jet, and a printing method thereof.

[0022]

In order to achieve the above object, the can body of the present invention has at least the outer circumference of the winding portion of a can lid which is wound around one of the end edges of a necked-in can body. It is characterized in that a code mark relating to the manufacture of a can body is printed.

The can body of the present invention is particularly suitable when the can lid is a plated steel plate.

The code mark may relate to the manufacture of either or both the can body and the can lid.

Furthermore, the can body of the present invention is particularly suitable when the can lid is an easy open can lid.

In order to achieve the above object, the method of printing a code mark according to the present invention is such that, after a can lid is wound around one of the edge portions of the can body, at least the can is inkjet-printed on the outer periphery of the wound portion. It is characterized in that a code mark relating to the manufacture of the cylinder is printed.

The code mark may relate to the production of a can body and a can lid, and the can lid may be an easy open can lid.

[0028]

In the can body of the present invention, at least the code mark relating to the production of the can body is printed on the outer periphery of the canning portion of the can body which is wound around one of the edge portions of the can body. Printing is performed at a position different from the manufacturing information of the canned product and the manufacturing information of the can itself.

Since the code mark is printed by an ink jet using a normal ink, it is not necessary to use a special solvent such as a transparent ink or a fluorescent agent or an apparatus for applying this.

Since the code mark is printed by ink jet, even if the can body is a plated steel plate, the plating layer is not damaged as in the case of engraving, and no unevenness is formed on the outer circumference of the can lid winding portion.

Since the code mark is printed by ink jet, it is easy to change the print information.
Not only the manufacturing date but also the manufacturing time can be printed in minutes.

Further, according to the present invention, since the code mark is printed on the outer circumference of the can lid winding portion of the can body which has been subjected to the neck-in processing, the can body is different from the other cans as in the case where the code mark is printed on the outer circumference of the can body. The printed surface does not come into contact even if it makes contact.

Further, since printing can be performed on any portion of the outer circumference of the can lid winding tightening portion, it is easy to perform positioning during printing.

Further, it is possible to print information on the can lid and the can body and information at the time of winding the can lid and the can body on the code mark.

It is also possible to print information about the score for the opening and the tab for the opening, especially if the can lid is an easy open can lid.

According to the method of printing a code mark of the present invention, since the code mark is printed after the can body and the can lid are wound, not only the can lid and the individual information of the can body but also the can body and the can lid are printed. The information at the time of winding can be printed.

The printing may be performed at any position as long as it is the outer periphery of the can lid winding tightening portion.

[0038]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The can body in which a code mark is printed on the outer periphery of the winding portion of the can lid and the method for printing the can body according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an explanatory view showing one embodiment of the present invention, FIG. 2 is an enlarged view of a code mark, and FIG. 3 is a schematic view of an apparatus for carrying out the code mark printing method of the present invention.

First, a can body in which a code mark is printed on the outer circumference of the winding portion of the can lid will be described.

As shown in FIG. 1, the can body 1 is a three-piece can, and a can lid 3 is wound around one of the side edges of a can body 2 having a tubular shape.

The can body 2 is made of a plated steel plate whose outer surface is decoratively printed. The can body 2 is formed into a tubular shape by welding and joining plate-like ones, and both ends thereof are subjected to neck-in processing in which both ends are narrowed down. There is.

The can lid 3 is a stion tab type easy open can lid made of a plated steel plate, and is provided with an opening score 5 and an opening tab 6.

A code mark 7 is formed on the outer circumference 4 of the can lid winding portion, and the date and time of manufacture of the can body 2 and the can lid 3 and the production line number in minutes are coded and printed by an ink jet printer. There is.

As an example of symbolization, the numbers 0 to 9 and the letters A to J are associated with each other to display the manufacturing date and hour and minute, and the factory name is displayed with the first two digits of the Roman letters. did.

This is to prevent confusion with the filling date of the canned product displayed on the can lid by not using numbers.

The manufacturing date, hour, and minute have a two-digit printing space, and are blank if no digit can be entered in the tenth digit.

As for the factory name, if there is only one initial letter in Roman letters, there are other factory names that start with the same initial letter, so the display corresponding to the factory name is determined in advance. For example, “TT” is set for the Tatebayashi factory, and “TK” is set for the Tokyo factory.

Since the manufacturing line is also represented by a two-digit number, it is represented by two letters like the manufacturing date.

In addition, the code mark on the can body is displayed first,
Insert the hyphen and display the code mark on the can lid after that.

Specifically, the code mark "JEBA" in FIG.
CGBIDIIT J-JE JDA F HITD
"JEBACGBIDII" in front of Hai Phong
“T J” is the information about the can body, and “JE J” after the hyphen
"DA F HITDG" is the can lid information.

The code mark of the can body is "JE" 94
"BA" is October, "CG" is 26th, "BI" is 18:00, "DI" is 38 minutes, "IT" is Iwatsuki factory,
The "J" represents the ninth car. In other words, this can barrel is used on the 26th line of October 26, 1994 at the No. 9 line of the Iwatsuki factory
It can be seen that it was manufactured at 38 minutes.

The code mark on the can lid is "JE" 94.
Year, "J" is September, "DA" is 30th, "F" is 5
At that time, "H" represents 7 minutes, "IT" represents the Iwatsuki Factory, and "DG" represents Unit 36. That is, it can be seen that this can lid was manufactured at 5:07 on September 30, 1994 at the No. 36 line of the Iwatsuki Factory.

According to this embodiment, since the information about the manufacturing of the can body and the can lid can be grasped by the code mark about the manufacturing date and time and the manufacturing line, there is some trouble caused by the can body and the can lid. In this case, it is possible to easily pour out a can body or a canned product that has a high possibility of having a defect produced before or after the production date, time, and time before or after the production line when the defective product was produced. Becomes

Particularly, in the case of an easy open can lid,
Since information on not only the can body but also the can lid can be managed, even when a defect such as a defective opening occurs, the line that caused the defective opening and the date of its manufacture can be grasped by the hour and minute, and the processing can be reviewed. It can respond quickly.

According to this embodiment, both ends of the can body 2 are neck-in processed, so that the can body 1 can be conveyed when the can body 1 is conveyed.
Even if they collide with each other, the portions where the code marks 7 are printed do not come into direct contact with each other, so that the ink is not peeled off.

According to the present embodiment, even if a plated steel plate is used for the can lid, the plating layer is not damaged as in the case of a marking, so that rust can be prevented.

Further, in this embodiment, 29 digits of information including hyphens are printed, and 4 characters can be printed per cm, so 7.25 cm is required as a whole, but a 190 g can with a relatively small capacity. However, since the outer circumference of the can lid winding portion is usually about 15 cm, sufficient printing is possible.

In the present embodiment, the individual information of each of the can body 2 and the can lid 3 is printed. However, the present invention is not limited to this, and the can score of the can lid 3 is the opening score 5 and the opening tab 6. The information may be encoded and printed, and the can body 2
The information at the time of winding the can lid 3 may be encoded and printed.

Further, in this embodiment, the information on the can barrel 2 and the can lid 3 is printed, but the information on the can barrel 2 only or the information on the can lid 3 may be printed if necessary.

Further, in the present embodiment, the can lid 3 is an easy open can lid made of a plated steel plate, but it is not limited to this, and a non-easy open can lid may be used by using a material such as aluminum.

The symbolization method is not limited to the above method, and other alphabets or numbers may be used.

Although the present embodiment is applied to a beverage can, the present invention is not limited to this, and may be used for canning seafood, for example.

Although the can body is a welded body in this embodiment, it is not limited to this and may be a solder joint can or the like.

Next, an example of the implementation of the code mark printing method of the present invention will be described.

As shown in FIG. 3, the method of printing the code mark is that the can body 1 having the can lid wound up is conveyed by the conveying device 8 and is conveyed to the endless belt 10 by the guide rails 9. An ink jet printer print head 11 is provided so as to come to the position of the outer circumference 4 of the can lid winding portion, and a code mark such as the date when the outer circumference 4 of the can lid winding portion is wound and the production line is printed. .

The printed code mark is the endless belt 10.
However, since the can bodies have a neck-in structure, the code mark printed parts do not contact each other even if they contact each other, and the printed parts do not fade. Absent.

Therefore, it is not necessary to apply the transparent coating material for protecting the printing surface from the top of printing.

Further, the code mark 7 may be printed at any position as long as it is the outer circumference 4 of the can lid winding portion, and since it is not necessary to position the can body 1 in the circumferential direction, the guide rail 9 can be used. It is only necessary to position the outer circumference 4 of the lid winding portion and the inkjet printer print head 11.

The printing of the code mark 7 is performed in the process of conveying the positioned can body 1 by the endless belt 10.
This is performed by rotating the can body 1 according to the printing speed.

[0071]

Since the can body of the present invention has at least the code mark relating to the manufacture of the can body printed on the outer circumference of the winding portion of the can lid, the manufacturing date of the canned product printed on the can lid surface, etc. Is printed separately and is easy to read, so the operator will not confuse both.

Further, since the code mark of the present invention is printed by ink jet, it is easy to change the print information, and it is possible to print not only the manufacturing line and the manufacturing date but also the manufacturing time in minutes. Therefore, it becomes possible to manage the production of finer cans.

Therefore, if any trouble occurs due to the can body, the code mark of the defective can body is read to determine the date and manufacturing line on which the defective can body was manufactured. Etc., it is possible to easily investigate the cause of the defect and collect the defective product.

Further, the code mark is printed by ink jet using a normal ink, and it is not necessary to use a special solvent such as a transparent ink or a fluorescent agent or a device for applying this, so that the cost can be reduced. Planned.

Further, since the code mark in the present invention is printed by ink jet, even if the can body is a plated steel plate, it does not damage the plating layer of the can body like marking, and there is no risk of rusting. The quality of the can can be maintained.

Further, when it is applied to the easy-open can lid of a beverage can, when a person drinks the contents of the can, no unevenness is generated in the can lid winding tightening portion, so that no discomfort is given.

Further, according to the present invention, since the code mark is printed on the outer circumference of the winding portion of the can body and the can lid which are neck-in processed,
Even when the can body comes into contact with other cans like the case where the code mark is printed on the outer periphery of the can body, the printing surface does not come into contact, so
There is no fear that the printing will be faded, there is no need to apply transparent paint on the printed surface, and the cost and man-hours can be reduced.

The code mark in the present invention can also be printed with information on the can lid and the can body and information on the winding of the can lid and the can body, so that problems caused by the can body can be swiftly and accurately performed. Can be dealt with.

Particularly when the can lid is an easy-open can lid, there is a high demand for managing the score for opening and the information when the tab for opening is provided, which is particularly preferable.

According to the code mark printing method of the present invention, since the code mark is printed after the can body and the can lid are wound, not only the individual information of the can body and the can body, but also the can body and the can body are recorded. Information about the time of winding can be printed, and more detailed can manufacturing management can be performed.

Further, the positioning at the time of printing may be performed only by positioning the outer circumference of the can lid winding portion and the print head of the ink jet printer.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is an enlarged view of a code mark of the present invention.

FIG. 3 is a schematic view of an apparatus for carrying out the code mark printing method of the present invention.

FIG. 4 is an explanatory view showing a conventional example.

[Explanation of symbols]

1 ... Can body, 2 ... Can body, 3 ... Can lid, 4 ... Can lid winding outer periphery,
7 ... Code mark, 11 ... Inkjet printer print head.

Claims (7)

[Claims] 1. A can body characterized in that at least a code mark relating to the manufacture of the can body is printed on the outer periphery of the winding part of a can lid which is wound around one of the end edges of a neck-in processed can body. 2. The can body according to claim 1, wherein the can lid is a plated steel plate. 3. The can body according to claim 1, wherein the code mark relates to the production of a can body and a can lid. 4. The can body according to claim 1, wherein the can lid is an easy open can lid. 5. After the can lid is wound around one of the edge portions of the can body,
A code mark printing method, characterized in that at least a code mark relating to the production of a can body is printed on the outer periphery of the winding portion with an ink jet. 6. The method of printing a code mark according to claim 5, wherein the code mark relates to the production of a can body and a can lid. 7. The method for printing a code mark according to claim 5, wherein the can lid is an easy-open can lid.