JP7159641B2 - Method for manufacturing metal cans - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing filled printed cans with good design, in which an inkjet image is printed on a filled can filled with contents such as food, beverages, cosmetics, and the like. It also relates to a system for delivering filled printed cans manufactured by the method. Further, it relates to filled printed cans filled with contents.

Conventionally, in order to meet the demand for on-demand printing, an invention has been made in which inkjet printing is performed on empty drink cans (Patent Document 1).

Patent No. 6242880

However, in the invention described in Patent Document 1, since ink-jet printing is performed on empty cans, the ink may bleed or rub off after subsequent processes such as filling and sealing, and the image printed on the surface of the can may be lost. There was a problem of deterioration.

The present invention solves the above-mentioned problems, and provides a method for manufacturing high-quality filled and printed cans by applying inkjet printing to filled and sealed filled cans filled with contents such as foods, beverages, and cosmetics. for the purpose.

The present inventors have studied to solve the above problems, and completed the present invention by applying inkjet printing to the surface of a filled can filled and sealed with contents.

That is, the present invention
and a printing step of inkjet image printing on the surface of the filled can filled and sealed with the contents.
Furthermore, it is preferable to include a surface modification step of modifying the surface of the filled can before the printing step, and in the printing step, an inkjet image is printed on the surface-modified portion in the surface modification step.
Inkjet image printing may be performed directly on the surface of the metal can after filling and sealing, but the metal can filled with the contents is used as a processing tool in the can manufacturing process, as described in Japanese Patent No. 4925153, for example. To reduce the friction of the can, to improve the slipperiness during transportation in the can manufacturing process and the can manufacturing process, and to prevent the outer surface of the can body from being scratched. In general, the varnish is applied by the method of (1), and the water-repellent effect of the varnish may hinder good ink-jet image printing. Therefore, it is preferable to carry out a surface modification step and print an inkjet image on the surface-modified portion.

In addition, the filled can filled with contents preferably includes a sterilization treatment process before the surface modification process, preferably includes a removal process from a temporary storage location before the surface modification process, and a printing process. It is preferred to include a placement step for subsequently placing the filled printed cans.
In the surface modification step, it is preferable to spray a combustion flame containing a silicon compound on the surface of the metal can filled and sealed with the contents. Preferably, alternatively, the method comprises the steps of forming an inkjet image on a transfer medium and transferring said inkjet image formed on said transfer medium to a fill can.
In addition, there are various preferred forms of filled cans in which contents are filled and sealed prior to ink-jet image printing. For example, it may be a filled can that is pre-printed on at least part of the surface, at least part of the pre-printing may be solid printing, and may include a portion where no pre-printing is performed, The portion for inkjet image printing may not be pre-printed, and may be a filled can in which at least a portion of the outermost layer is coated with varnish.

In another aspect, the present invention includes an order receiving process for receiving orders for a predetermined number of filled printed cans, a filled printed can manufacturing process for manufacturing printed filled cans by any of the above methods, and the manufacturing of filled printed cans. A step of delivering a predetermined number of filled printed cans among the number of filled printed cans ordered in the order receiving step to the orderer or a place designated by the orderer, from the filled printed cans manufactured in
including manufacturing and distribution systems for filled printed cans.

Further, as another aspect of the present invention, there is provided a printed can having an inkjet image printed on its surface, wherein the two layers are at least Included, filled print cans.
In addition, it is preferable that the filled printed can include a solid printed layer between the surface of the filled can and the inkjet printed layer, and it is preferable that the filled printed can include a surface modification layer between the varnish layer and the inkjet printed layer. Preferably, the surface modification layer is a silicon oxide film.

Furthermore, as another aspect of the present invention, there is provided a filled can filled with a content having a printed layer including a first printed portion and a second printed portion on the surface thereof, the first printed portion comprising: The printing layer is coated with a varnish, and the second printing part includes a filled printing can filled with a content having an inkjet printing layer formed on the surface modification layer.
Moreover, it is preferable that the thickness of the second printed portion is larger than that of the first printed portion.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a method for manufacturing high-quality filled printed cans, in which ink-jet printing is applied to filled cans filled and sealed with contents such as food, beverages, and cosmetics. Then, by using the present invention, it is possible to print on filled cans that have been filled and sealed with contents. It becomes possible to manufacture.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows one form of the surface treatment apparatus which performs a surface modification process. 1 illustrates a flow diagram of a delivery system, one embodiment. FIG. 2A is a schematic top view of a printed layer on the surface of a metal can filled with a content according to one embodiment, and FIG. FIG. 2A is a schematic top view of a printed layer on the surface of a metal can filled with a content according to one embodiment, and FIG. FIG. 2A is a schematic top view of a printed layer on the surface of a metal can filled with a content according to one embodiment, and FIG. FIG. 2A is a schematic top view of a printed layer on the surface of a metal can filled with a content according to one embodiment, and FIG. 1 is a schematic diagram showing an example of the configuration of a printing system that performs a printing process; FIG.

One embodiment of the present invention is a method of manufacturing a filled printed can, which includes a printing step of inkjet image printing on the surface of a filled can filled and sealed with a content.
Furthermore, it is preferable to include a surface modification step of modifying the surface of the filled can before the printing step, and in the printing step, inkjet images are printed on the surface-modified portion in the surface modification step. In this embodiment, processes other than the surface modification process and the printing process may be included as necessary. Filling and sealing process for filling empty cans with contents, that is, filling and sealing process for filling empty cans with contents, and sterilization treatment for filling cans such as retort, paste, and high-pressure sterilization before surface modification process A step of removing filled cans from a temporary storage location (i.e., temporarily placed or temporarily stored) by a palletizer or the like. may contain. Furthermore, a placement step of temporarily placing the printed filled can after the printing step may be included. Needless to say, steps other than the steps described above may be included.

In this embodiment, an inkjet image is printed on the bottom of a filled can filled with contents with numbers, symbols, marks such as production date, lot number, product number, etc. for product management / tracking. It is different from "printing".

<Filling and sealing process>
The filling and sealing step is a step of filling and sealing empty cans. The filling and sealing step is not particularly limited as long as the empty can can be filled with the contents and sealed, and can be performed as appropriate depending on the type of the contents and the type of the empty can. Filled cans may be obtained and inkjet images printed on the obtained filled cans.

<Surface modification step>
The surface modification step is a step of modifying the surface of the filled can filled and sealed with the contents. The method of the surface modification step is not particularly limited as long as it can improve the adhesion between the surface of the filled can filled and sealed with the contents and the ink for inkjet image printing. For example, a method of blowing a combustion flame containing a silicon compound onto the surface of a filled can, a method of plasma-treating the surface of a filled can, a method of corona-treating the surface of a filled can, and a varnish applied to the surface of a filled can to improve ink adhesion. Examples include a method using varnish and a method of coating the surface of the filled can with a receptive layer that allows the ink to stay on the surface of the filled can.
Among these, it is preferable to modify the surface by blowing a combustion flame containing a silicon compound. By blowing a combustion flame containing a silicon compound, a silicon oxide film can be formed on the surface of the filled can. By forming the silicon oxide film on the surface of the filled can, the adhesion between the ink and the filled can can be improved in the subsequent inkjet image printing.

A known method disclosed in, for example, Japanese Patent No. 3626424 or Japanese Patent No. 4366220 can be used to spray a combustion flame containing a silicon compound.
The silicon compound is not particularly limited, and typically includes silane compounds such as alkylsilanes and alkoxysilanes, but is not limited to these. These silane compounds may have nitrogen, halogens such as chlorine, vinyl groups, amino groups, and the like.
From the viewpoint of forming a good silicon oxide film on the surface of the filled can, the upper limit of the boiling point of the silicon compound is usually 250° C. or lower, may be 200° C. or lower, may be 180° C. or lower, and may be 150° C. or lower. It's okay. The lower limit is not particularly limited, and is usually 20°C or higher, and may be 50°C or higher.

The temperature of the combustion flame is not particularly limited, and may be generally 500° C. or higher, 550° C. or higher, or 600° C. or higher. The upper limit is usually 1500° C. or lower, may be 1250° C. or lower, or may be 1000° C. or lower.

The duration of the combustion flame spraying is not particularly limited, but in this embodiment, since the combustion flame is sprayed onto the filled can filled with the contents, it is possible to perform surface modification by spraying for a short period of time. and from the viewpoint of protecting the contents. It is preferable that the combustion flame is sprayed multiple times onto the body of the metal can on which the ink-jet image is to be printed. In the present embodiment, the time for which the combustion flame is sprayed is preferably within 10 seconds, may be within 5 seconds, may be within 3 seconds, may be within 2 seconds, and may be within 2 seconds. It may be within 1 second. Although the lower limit is not particularly limited as long as the surface modification is performed, it is usually 0.001 seconds or more.

Fuel gas is generally used to provide a combustion flame. Combustible gases such as propane gas and natural gas are typically used as the fuel gas. Hydrogen, oxygen, air, or the like may be appropriately mixed with these combustible gases.

The amount of the silicon compound contained in the fuel gas is not particularly limited, but it is usually 1.0×10 ⁻¹⁰ mol % or more, and may be 1.0×10 ⁻⁹ mol % or more, based on the total amount of the fuel gas. , 1.0×10 ⁻⁸ mol % or more. The upper limit is usually 10 mol % or less, may be 5 mol % or less, or may be 1 mol % or less.

FIG. 1 shows an example of a surface treatment apparatus for spraying combustion flames used for surface modification treatment.
The surface treatment apparatus 10 includes an apparatus main body 6 having gas transfer sections 61a and 61b and an injection port 62, and a silicon supply section having a nozzle 21 for supplying a silicon compound to the apparatus main body 6 and a tank 22 for storing the silicon compound. 2, and a gas supply unit (not shown) that supplies gas to the gas transfer units 61a and 61b of the apparatus main body 6. As shown in FIG.

Combustion gas such as natural gas is supplied from the gas supply unit to the gas transfer unit 61a, and air is supplied as carrier gas from the gas supply unit to the gas transfer unit 61b. The gas transferred by the transfer parts 61 a and 61 b is mixed with the silicon compound supplied from the silicon supply part 2 and injected from the injection port 62 . Here, the mixed gas is ignited by a separately provided ignition means, becomes combustion flame 5 , and is jetted onto the surface of the filled can 1 . The combustion flame 5 with the injected silicon compound forms a silicon oxide film on the surface of the filled can 1 .
The distance between the injection port 62 of the surface treatment apparatus 10 and the surface of the filled can 1 is not particularly limited, but is usually 1 cm or more, may be 3 cm or more, or may be 5 cm or more. Moreover, it is usually 30 cm or less, may be 20 cm or less, or may be 15 cm or less.

In the surface modification step, the surface of the filled can filled with contents is modified. Filled cans filled with contents typically include filled cans filled with foods and beverages, but the contents are not particularly limited thereto. An example of preparing a filled can in which a beverage is filled and sealed will be described below. In addition, the description that the beverage is "filled and sealed" or the beverage is "after filling and sealing" in the present application refers to a long time from immediately after filling and sealing to other processes after filling and sealing, such as sterilization, transportation, and placement. Any time between axes is fine.

A method for making empty cans is not particularly limited, and a known method can be applied. For example, methods for manufacturing two-piece cans include drawing, redrawing, and ironing. Methods for manufacturing three-piece cans include a tin plate cutting process, a roll forming process, a can body welding process, and a can body stretch forming process. In addition, there are paneling molding for deformed can bodies such as elliptical, square, and embossed can bodies, flange molding for seaming can lids, and necking molding.
At least a part of the surface of the molded empty can may be printed. Although the printing method is not particularly limited, offset printing is a common printing method for cans. The printing process may be carried out on the formed empty can, or may be carried out at a plate-like stage before forming. A known method can be applied to offset printing on seamless cans, for example, a method of transferring ink to a blanket and continuously offset printing on the surface of seamless cans can be applied.

In this embodiment, the surface of the filled can is modified after the beverage is filled, and the inkjet image is printed on the surface of the filled can. good. That is, the surface of the molded empty can may be partially printed, may have a non-printed portion, or may not be printed at all. Similarly, since surface modification is performed after filling and sealing, and inkjet image printing is applied to the surface of the filled can, in order to make the image of the inkjet image print stand out, at least a part of the filled can surface is solidly printed. It may be a solid white background. However, the solid printing method is not limited to offset printing, and a white coater may be used. Also, the solid color is not particularly limited. Further, the solid coating printing process may be performed before filling the contents, or may be performed at any time after filling and sealing until ink jet printing.

Empty cans printed as required in this way are filled and sealed with contents such as food and beverages, and become filled cans with the contents filled and sealed. As described above, the surface of the filled can after filling and sealing is generally coated with a varnish containing wax.

<Printing process>
The printing step is the process of inkjet image printing onto the surface of the filled can, preferably onto the surface modified portion. A method of inkjet image printing is not particularly limited, and a known method is applied. For example, a method of directly printing the ink onto the filled can by inkjet image printing, or a method of once forming an image on a transfer medium and then transferring the image to the filled can may be used. Inkjet printing enables pattern printing, photo printing, image printing, etc., and greatly improves the design of the surface of the filled can. In addition, in the present embodiment, a silicon oxide film is formed on the surface by performing surface modification, and in addition to improving adhesion to inkjet image printing, the inkjet ink spreads well on the silicon oxide film. Therefore, the effect that the base of the filled can is not transparent is also exhibited.
It should be noted that not only inkjet printing but also screen printing and hot stamping can realize small-lot low cost.

According to this embodiment, even when printing on filled cans in which the contents are filled and sealed, the adhesion between the printing ink and the filled cans is good, so inkjet printing can be performed on the required number of filled cans. Therefore, even in a small lot, filled printed cans printed can be provided at low cost. Therefore, it is possible to manufacture filled cans with ink-jet image printing for each required number, and the following other embodiments of the present invention are also possible. i.e.
Manufacture and delivery of filled printed cans, comprising a step of manufacturing a predetermined number of ordered printed filled cans by the above method, and a step of delivering the manufactured cans to an orderer or to a location designated by the orderer. System.

FIG. 2 is a flow diagram showing an example of another embodiment of the present invention.
The flow diagram includes pre-steps 1-3 and steps 1-5. Pre-steps 1 to 3 are pre-performed prior to steps 1 to 5, and are therefore referred to as pre-steps.

The pre-step is a step of manufacturing a filled can filled with contents, the pre-step 1 is a step of manufacturing an empty can, and the pre-step 2 is a step of applying offset printing to the surface of the empty can. Step 3 is a step of filling and sealing the contents into the empty can.
The filled cans filled with contents in the pre-step 3 are sterilized. After that, it will be judged here once. In one form, 20,000 filled cans are produced by performing presteps 1-3.

In step 1, the order acceptance step, the number of filled printed cans requested and the images or photographs to be printed on the surface of the filled printed cans are received. Orders may be placed by phone or mail, but online ordering makes it easier to manage the number of orders, and the received image data and photo data can be easily applied to the inkjet image printing in step 3. ,preferable.
The process of the order acceptance step is shown in FIG. 2 after filling and sealing of the contents in pre-step 3 and before surface modification in step 3, but it is not limited to this timing.

In step 2, the surface modification step, the surface of the filled can filled with the contents is modified by spraying combustion flame containing, for example, a silicon compound. Such modification improves the adhesion between the ink-jet image print and the filled can in step 3, and prevents the print from peeling off from the can during transportation in step 4.

In the inkjet image printing step of step 3, inkjet image printing is performed on the surface of the filled can that has undergone the surface modification in step 2. Inkjet image printing is a step of inkjet image printing the image or photograph received in step 1 onto the surface of the filled can filled and sealed with contents.
Then, the cans on which the ink-jet image is printed in step 3 are delivered and delivered in steps 4 and 5.
In this delivery/delivery step (steps 4 and 5), it is possible to deliver/deliver a predetermined number of the ordered number even if the entire ordered number is not delivered/delivered at once, depending on the form of the order. is assumed.

Here, the process of the order acceptance step (step 1) is shown in FIG. Instead, you can go at any stage. Specifically, before pre-step 1, during any of pre-steps 1-3, during any of steps 2 and 3, during pre-steps 1-3, during steps 2 and 3, step After 3 is considered. In either case, the order acceptance step (step 1) should be used as a trigger to reach the delivery/delivery steps (steps 4 and 5). In other words, the embodiment of FIG. 2 shows a mode in which the filled cans are temporarily placed after pre-step 3. It is also conceivable to temporarily place empty cans or printed and filled cans, and use the order acceptance step (step 1) as a trigger to carry out subsequent steps, leading to the delivery/delivery steps (steps 4 and 5). In addition, if there is an order receiving step (step 1) before pre-step 1, the order receiving step triggers the can manufacturing process of pre-step 1, the inkjet printing process of step 3, and the delivery/delivery step (step 4 , 5).
In FIG. 2, the term "pre-step" is used as the process before the order acceptance step. , it goes without saying that it becomes a normal “step”.

In this way, this embodiment, which accepts orders for small lots on-line or the like and can print photographs and images on the surface of filled cans as needed, significantly reduces the manufacturing cost of filled printed cans with images and photographs printed thereon. becomes possible. Therefore, it is possible to manufacture filling printed cans with special photos printed in units of several dozen as souvenirs, etc., and filled cans printed with special logos etc. in units of several hundred as novelty items. Cans can be manufactured.

Another embodiment of the present invention is a can manufactured by the manufacturing method described above, and has the following configuration. That is, it is a printed filled can having an inkjet image printed on its surface, and includes at least the above two layers in the order from the surface of the filled can: a varnish layer and an inkjet image printed layer.
In yet another embodiment, a filled printed can having a printed layer thereon comprising a first printed portion and a second printed portion, wherein the first printed portion comprises a printed A layer coated with a varnish and said second printing part can be a filled printed can filled with a content in which an inkjet printing layer is formed on a silicon oxide coating. Alternatively, a filled printed can having a printed layer on the surface and filled with the contents, in which a solid printed layer, a silicon oxide coating, and an inkjet image printed layer are formed in this order on the surface of the filled can filled with the contents. It can also be a filled printed can filled with contents. These configurations will be described with reference to FIGS. 3 to 6. FIG.

FIG. 3 is a schematic top view (a) showing the printed layer printed on the surface of the filled can filled with the contents, and shown from the top surface (a), and a schematic cross-sectional view (b) of the AA' section. ).
As shown in FIG. 3A, the spread printing layer 100 has a first printing portion 101 and a second printing portion 102. The first printing portion 101 has an image printed by plate printing. An inkjet image is printed on the second printing unit 102 by inkjet printing.
In this embodiment, a portion other than the second printed portion 102, that is, the first printed portion 101 is printed with a design image, and then the remaining second printed portion 102 is inkjet-printed to form a printed layer on the surface of the filled can. to form The sectional view differs between the first printing unit 101 and the second printing unit 102 as shown in FIG. 3B. The first printed part 101 is formed by laminating an image printed layer 104 and a varnish layer 105 in this order on the surface 103 of the filled can. On the other hand, the second printed portion 102 is formed by laminating a varnish layer 105, a silicon oxide film 106, and an inkjet image printed layer 107 on the surface 103 of the filled can in this order. With such a form, it becomes possible to print a high-definition ink-jet image printing layer only on a necessary part.

As another form, the form of FIG. 4 is illustrated. Similarly, in FIG. 4, the printed layer printed on the surface of the filled can filled with the contents is expanded on a plane, and a schematic top view (a) shown from the top, and a schematic cross-sectional view of the BB' section. (b).
As shown in FIG. 4A, the spread printing layer 200 has a first printing portion 201 and a second printing portion 202. The first printing portion 201 has an image printed by plate printing. An inkjet image is printed on the second printing unit 202 by inkjet printing.
In this embodiment, the design image 204 is printed on the entire surface of the can, and varnish is applied. A printed layer is then formed by inkjet image printing. As shown in the sectional view of FIG. 4B, the first printed portion 201 is formed by laminating an image printed layer 204 and a varnish layer 205 in this order on the surface 203 of the filled can. On the other hand, the second printing portion 202 is formed by laminating a silicon oxide film 206 , a solid printing layer 208 and an inkjet image printing layer 207 on an image printing layer 204 and a varnish layer 205 in this order. With such a form, it is also possible to print a high-definition inkjet image-printing layer only on a necessary portion.

FIG. 5 is a schematic top view (a) showing the printed layer printed on the surface of another form of filled can in which the contents are filled and sealed, unfolded on a plane and shown from the top; It is a cross-sectional schematic diagram (b).
As shown in FIG. 5A, the entire surface of the development print layer 300 is printed with an inkjet image by inkjet printing. As shown in FIG. 5(b), the sectional view is such that a solid printed layer 304, a varnish layer 305, a silicon oxide film 306, and an ink jet image printed layer 307 are laminated in this order on the surface 303 of the filled can. The solid print layer 304 may be a white coating layer or other single color solid image. Due to the presence of the silicon oxide film 306, the inkjet image printing layer 307 has sufficient adhesion even on the varnish 305 with insufficient ink adhesion.

Moreover, as another form, the form of FIG. 6 is illustrated. FIG. 6 is a schematic top view (a) showing a printed layer printed on the surface of another form of filled can filled with a content, unfolded on a plane and shown from the top.
and a schematic cross-sectional view (b) taken along line DD'.
As shown in FIG. 6A, the entire surface of the development print layer 400 is printed with an inkjet image by inkjet printing. A varnish layer 405 is laminated on the surface 403 of the filled can as shown in FIG. 6(b). That is, a silicon oxide film 406 is formed on the surface of a filled can that is only coated with varnish, and a solid print layer 404 and an inkjet image print layer 407 are laminated thereon in this order.

An example of a printing system that performs a printing process for offset printing an inkjet image on the surface of a filled can will be described below with reference to FIG. 7 .
FIG. 7 is a schematic diagram showing an example of the configuration of the printing system I-100.
The printing system I-100 includes a printing station I-10 as image forming means, a conveyor belt I-20 as image conveying means, a transfer station I-30 as transfer means, a wheel I-40 as can conveying means, and a cleaning station I-40. means, washing station I-50, and coating means, overcoat station I-60. The printing system I-100 may have configurations other than these.

The printing station I-10 comprises a printing unit I-11 which in turn prints an inkjet image I-14 (not shown) onto a blanket I-23 which is carried by a transport belt I-20 by means of an inkjet printer head provided by the printing unit I-11. is formed. There may be only one printing unit I-11 in the printing station I-10, or there may be a plurality of printing units. By having multiple printing units I-11, it is possible to respond to high-speed printing, and since it is also possible to respond to printing methods with a large number of passes, the quality of printed images is improved and high-definition inkjet images can be produced. I-14 can be formed on blanket I-23.

The inkjet printer head provided in the printing unit I-11 typically has a plurality of nozzles that eject inks of white (W), black (K), yellow (Y), magenta (M), and cyan (C). Head I-12 is included. The order of colors is not particularly limited, and the colors of ink are not limited to these. Therefore, clear ink may be used.

The printing unit I-11 may be provided with a nozzle bed for ejecting a primer layer (Pr), in which case it is positioned downstream of the inkjet printer head to apply a primer to the formed inkjet image I-14. It can be covered by layers.
The printing unit I-11 may further include a UV irradiation section I-13 as curing means. If the ink ejected by the inkjet printer head is UV curable ink, it is semi-cured by UV irradiation to suppress ink residue that may occur when the inkjet image I-14 is transferred to the can I-41 at the transfer station. can.
Also, instead of the UV irradiation section I-13, a drying means may be provided as a curing means. The drying means can semi-harden the inkjet image I-14 by a method such as blowing hot air onto the inkjet image.

The conveying belt I-20 is looped through a first roller I-21 and a second roller I-22. , to transfer station I-30. The number of blankets I-23 of the conveying belt I-20 can be appropriately determined according to the circumferential length of the annular conveying belt and the operating speed of the printing system.

The transport belt I-20 may be flexible, but if the material is excessively flexible, the tension of the belt may be insufficient, resulting in misalignment during printing or transfer. The material of the transport belt I-20 is not particularly limited.
In addition to the first roller I-21 and the second roller I-22, one or more auxiliary rollers may be provided for the purpose of guiding the transport belt.

Blanket I-23 with inkjet image I-14 formed thereon is transported along the circumference of first roller I-21 to transfer station I-30. Meanwhile, wheels I-40 convey a plurality of cans I-41 to transfer station I-30. When the tip of the blanket I-23 comes into contact with the transported can I-41, or just before it comes into contact with the can I-41, the can I-41 starts to rotate, and after contact, the blanket I-23 The inkjet image I-14 formed on the can is transferred in the circumferential direction of the can I-41 to form an inkjet image on the surface of the can I-41. The positioning of the blanket I-23 and the can I-41 may be performed as appropriate, and the positioning may be performed by a known method.
When the tip of the blanket I-23 comes in contact with the transported can I-41, the rotation of the mandrel wheel I-40 itself is stopped, and the can I-41 is rotated while the wheel I-40 is stopped. and the inkjet image I-14 formed on the blanket I-23 may be transferred to the can I-41. This embodiment can also be applied to such intermittent printing.

After inkjet image I-14 is transferred from blanket I-23 to the surface of can I-41 at transfer station I-30, blanket I-23 may be washed on its surface at washing station I-50. In this embodiment, the ink jet image I-14 can suppress ink residue on the blanket I-23 due to the presence of the connecting member. On the other hand, since it is possible that not all the ink is transferred, a washing station I-50 may be provided to wash the ink on the blanket I-23.

The cleaning station I-50 typically includes a cleaning agent supply I-51 for dispensing cleaning agent onto the blanket I-23 and a scraper I-52 for wiping ink off the blanket I-23. Blanket I-23, whose surface has been cleaned at cleaning station I-50, is guided by second roller I-22 and conveyed again to printing station I-10, where inkjet image I-14 is formed thereon.

The can I-41 with the ink jet image I-14 transferred is transported by the wheel I-40 to the overcoat station I-60. At overcoat station I-60, the ink jet image I-14 transferred onto the can I-41 surface is coated. A varnish is typically used for the coating, but other materials may be used as long as they protect the ink jet image and improve its durability.

A surface modification means for modifying the surface of the can may be installed in the printing system I-100. For example, the surface modification means may be provided upstream of the transfer station of the can transport means.
It goes without saying that the printing system I-100 shown in FIG. 7 may also be used to pre-print the filled cans.

10 Surface treatment device 1 Filled can 2 Silicon supply part 21 Nozzle 22 Container 3 Natural gas 4 Air 5 Combustion flame 6 Apparatus body 61a Gas transfer part 61b Gas transfer part 62 Injection ports 100, 200 Expanded printing layers 101, 201 First printing Parts 102, 202 Second printing parts 103, 203 Metal can surfaces 104, 204 Image printing layers 105, 205 Varnish layers 106, 206 Silicon oxide films 107, 207 Ink jet printing layers 300, 400 Development printing layers 303, 403 Metal can surfaces 304, 404, 208 solid printing layer 305, 405 varnish layer 306, 406 silicon oxide coating 307, 407 inkjet printing layer I-100 printing system I-10 printing station I-11 printing unit I-12 nozzle head I-13 UV irradiation Section I-20 Conveyor Belt I-21 First Roller I-22 Second Roller I-23 Blanket I-30 Transfer Station I-40 Wheel I-41 Filling Can I-50 Cleaning Station I-51 Cleaning Agent Supply Section I- 52 Scraper I-60 Overcoat Station

Claims (11)

A surface modification step of modifying the surface of the filled can by blowing a combustion flame containing a silicon compound onto the surface of the filled can filled and sealed with the contents, and
a printing step of performing inkjet image printing on the portion of the surface of the filled can that has been surface-modified in the surface-modifying step;
including
A method for producing a filled printed can, wherein at least part of the outermost layer of the filled can is coated with varnish . 2. The method for manufacturing filled printed cans according to claim 1 , further comprising a sterilization treatment step of sterilizing said filled cans before said surface modification step. 3. The method for manufacturing filled printed cans according to claim 1 , further comprising a removing step of removing said filled cans from a temporary storage location before said surface modification step. 4. The method for producing filled printed cans according to any one of claims 1 to 3 , further comprising a placement step of temporarily placing the printed cans after the printing step. The method for producing a filled printed can according to any one of claims 1 to 4 , wherein the printing step performs inkjet image printing by ejecting ink directly onto the can. 5. The method according to any one of claims 1 to 4 , wherein the printing step comprises forming an inkjet image on a transfer medium, and transferring the inkjet image formed on the transfer medium to a filling can. A method for manufacturing a filled printed can. The method for producing a filled printed can according to any one of claims 1 to 6 , wherein the filled can is pre-printed on at least part of its surface. 8. The method of manufacturing a filled printed can according to claim 7 , wherein at least part of the pre-printing of the filled can is solid printing. The method for producing a filled printed can according to any one of claims 1 to 6 , wherein the filled can has a portion that is not pre-printed. 10. The method of manufacturing a filled printed can according to claim 9 , wherein the filled can is not pre-printed on the portion for inkjet image printing. an order-receiving process for receiving orders for a predetermined number of filled printed cans;
Filled printed can manufacturing process for manufacturing filled printed cans by the method according to any one of claims 1 to 10 ; A step of delivering a predetermined number of filled printed cans to the ordering party or to a place designated by the ordering party;
A manufacturing and delivery system for filled printed cans, including:

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