JP7456769B2 - Method for producing egg packaging - Google Patents

Description

The present invention relates to an egg container for storing eggs such as chicken eggs and quail eggs, and a method for manufacturing an egg package in which eggs are stored in the egg container.

Eggs are generally sold in supermarkets and the like in egg containers made of synthetic resin sheets, so-called egg cartons. The egg container consists of a main body and a lid that are integrally molded from a transparent synthetic resin sheet by thermoforming or the like. After the eggs are housed in the main body, the lid is closed and sealed to form an egg package in which the eggs are packaged in the egg container.

A printed label with a barcode printed thereon is attached to such an egg container. Barcodes are read by a barcode reader when paying for products at a cash register, and are used in a product sales information management system called a POS system. A different barcode is printed on the label for each egg product. Egg products come in many varieties, depending on the combination of the egg producer, the type of parent bird, the food given to the parent bird, the color and size of the egg, etc. Different barcodes are printed for different types of egg products. For example, there may be several dozen types of barcodes per producer.

Labels are affixed to empty egg containers before the eggs are packaged using a dedicated labeling device such as that described in Patent Document 1 below. Empty egg containers with labels affixed to them are then stacked and temporarily stored and inventoried by barcode type. The products are then shipped as needed.

Eggs are collected and packaged at a facility called a packing center. At the packing center, eggs are sorted and packaged. Packing centers collect eggs from numerous producers. Eggs from producers are consigned to a packing center, packaged, and shipped from the packing center to supermarkets and the like.

Egg containers are manufactured by container manufacturers. When a container manufacturer receives an order from a producer, the container is delivered to a packing center. Packing centers do not use specially shaped egg containers with low versatility, but often use highly versatile egg containers with the same shape. Even if egg containers have the same shape, if a label with a different type of barcode is attached to the egg container, the type of egg container with that label will naturally be different and will become a special container. Therefore, container manufacturers must manage and stock egg containers separately for each type of barcode, even if they have the same shape.

An example is shown in FIG. At the packing center, eggs are collected from many producers such as producer A, producer B, and so on. For example, the eggs produced by producer A include eggs of different colors, such as white eggs and red eggs. Furthermore, even if the white balls are the same, those fed with food α and those fed with food β are of different types. Furthermore, even if the eggs are the same white egg and fed with food α, the egg products differ depending on the size. Therefore, even if the eggs are from the same producer A, there are many types of egg products. The same applies to producer B. Therefore, different barcodes are printed on the labels for each of these egg products, and there are many types of egg containers with various types of labels attached.

For example, even for eggs 101 of producer A's white egg feed α, different dedicated egg containers are required for each size: S size, M size, and L size. Similarly, even for the eggs 102 of producer A's white egg feed β, different dedicated egg containers are required for each size: S size, M size, and L size. Even if the M-sized egg containers can hold the same M-sized eggs, the barcodes on the labels are different, resulting in a M-sized egg container for Producer A's Shirotama egg 101 with feed α and a M-sized egg container for Producer A's Shirotama eggs. The M-sized egg containers for the eggs 102 with food β are of different types. The egg container before the label is attached is the same egg container that can accommodate medium size eggs. However, each egg container to which a label is attached becomes a dedicated egg container that is different for each barcode. Therefore, container manufacturers must manage and stock egg containers separately for each type of barcode, even if they are the same M-sized egg containers. The same applies to S-sized egg containers, L-sized egg containers, etc.

To solve this problem, we considered printing barcodes directly on egg containers. However, even when attempting to print directly onto egg containers, it was found that the ink was difficult to adhere to the egg containers and the barcode was not printed clearly.

Japanese Patent Application Publication No. 5-178337

An object of the present invention is to reduce the number of types of specialized egg containers corresponding to egg products, and to reduce the effort involved in storing and managing egg containers.

The egg container of the present invention is an egg container made of a synthetic resin sheet, which comprises a main body having multiple egg storage compartments and a lid body integrally molded to be rotatable via a hinge section to the main body. A release agent is applied to the surface of the egg container, and a barcode printing area is provided on a portion of the surface of the egg container, where a barcode for identifying the type of egg can be printed.

The egg container is formed from a synthetic resin sheet. The synthetic resin sheet is manufactured by so-called sheet extrusion molding. A release agent is applied to the synthetic resin sheet. Application methods include double-sided coating, in which the coating is applied to both the front and back surfaces of the sheet, and single-sided coating, in which the coating is applied to only one of the front and back surfaces of the sheet. The synthetic resin sheet coated with a release agent is wound into a roll.

Even if the synthetic resin sheet is coated on only one side, the release agent is transferred from the coated side to the opposite coated side by winding it up into a roll. Therefore, the mold release agent is attached to both sides of the sheet.

A release agent is attached to the surface of an egg container formed from such a sheet. Therefore, even if an attempt is made to print a barcode directly on the surface of an egg container, the barcode cannot be printed neatly. On the other hand, a barcode printing area is provided on a part of the surface of the egg container. The barcode printing area is an area in which the amount of release agent is suppressed to the extent that a barcode can be printed. Therefore, a barcode can be reliably printed in the barcode printing area. No barcode is printed on the barcode printing area of the egg container. Egg containers without barcodes printed on them are delivered to a packing center, and at the packing center, a barcode corresponding to the type of eggs stored in the egg container is printed in the barcode printing area of the egg container. can. For example, in the example shown in FIG. 16, only one type of medium-sized egg container is required. Similarly, only one type of S-sized egg container and one type of L-sized egg container are required. Incidentally, even if empty containers are stacked together and the mold release agent migrates to the barcode printing area, the migration of the mold release agent after thermoforming is slight. Therefore, the amount of mold release agent in the barcode printing area is suppressed to an extent that allows printing of the barcode.

In particular, it is preferable that a barcode printing area is provided by attaching a separate member to the egg container. This makes it possible to easily form a barcode printing area on the egg container that is not affected by the release agent.

The method for producing egg packages according to the present invention is a method for producing egg packages in which multiple eggs are contained in the egg containers described above, and includes a container production process for producing egg containers, a container supply process for supplying egg containers in an open state to a conveying line, an egg containing process for containing eggs in the egg containers on the conveying line, a container sealing process for sealing the egg containers containing the eggs on the conveying line, and a printing process for printing a barcode in the barcode printing area of the egg container.

In particular, the container manufacturing process involves a container molding process in which egg containers are molded from a synthetic resin sheet coated with a mold release agent, and a barcode is printed on the surface of the egg container by attaching a separate member to the molded egg container. and an area forming step of providing an area for use.

In addition, the method for producing an egg package further includes a sealed container transfer step of transferring the container sealed in the container sealing step to the outside of the conveyance line, and the container supply step includes transferring the sealed container to a container station near the conveyance line in an open state. a container setting step in which a plurality of egg containers are set in a stacked state, and a container transfer step in which egg containers are sequentially transferred to a conveyance line from the egg container at the tip of the supply side among the plurality of egg containers stacked at the container station. In the printing step, a barcode is printed on the egg container in any one of (1) to (4) below.
(1) Egg container before the container setting process.
(2) The egg container at the tip of the supply side among the plurality of egg containers stacked at the container station.
(3) Egg containers on the conveyance line after the container sealing process.
(4) Egg container after the sealed container transfer process.

In addition, the method for producing an egg package further includes a sealed container transfer step of transferring the container sealed in the container sealing step to the outside of the conveyance line, and the container supply step includes transferring the sealed container to a container station near the conveyance line in an open state. a container setting step in which a plurality of egg containers are set in a stacked state, and a container transfer step in which egg containers are sequentially transferred to a conveyance line from the egg container at the tip of the supply side among the plurality of egg containers stacked at the container station. , and the printing step prints a barcode on the leading egg container on the supply side among the plurality of egg containers stacked at the container station.

As described above, it is possible to reduce the number of types of specialized egg containers corresponding to egg products, and it is possible to reduce the effort involved in storing and managing egg containers.

FIG. 1 is a perspective view showing an egg container in an open state in an embodiment of the present invention. FIG. 3 is a front view showing the egg container in an open state. The perspective view which shows the area formation process of the same egg container. BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the egg packaging body in one Embodiment of this invention. 1 is a schematic plan view showing a manufacturing process of an egg package in an embodiment of the present invention. A schematic plan view showing the same manufacturing process. The figure which looked at the same manufacturing process from the conveyance direction. The figure which looked at the same manufacturing process from the conveyance direction. The figure which looked at the same manufacturing process from the conveyance direction. FIG. 7 is a schematic plan view showing the manufacturing process of an egg package in another embodiment of the present invention. FIG. 7 is a schematic plan view showing the manufacturing process of an egg package in another embodiment of the present invention. FIG. 7 is a schematic plan view showing the manufacturing process of an egg package in another embodiment of the present invention. The perspective view which shows the lid open state of the egg container in other embodiment of this invention. FIG. 7 is a front view showing the egg container in an open state in another embodiment of the present invention. The figure which looked at the lid|opened state of the egg container in other embodiment of this invention from the lid body side. A diagram showing the relationship between conventional egg products and egg containers.

Hereinafter, a method for manufacturing an egg container (hereinafter simply referred to as a container) and an egg package according to an embodiment of the present invention will be described with reference to FIGS. 1 to 9. 1 and 2 show the container 1 in an open state. The container 1 includes a main body 2 and a lid 3. The main body 2 and the lid 3 are connected to each other by a hinge portion 4. The container 1 is of an integrated lid type, and the main body 2 and the lid 3 are integrally formed. The lid body 3 is rotatable relative to the main body 2 using a hinge portion 4 as a pivot point. The main body 2 and the lid 3 each have a rectangular shape in plan view, specifically, a rectangular shape in plan view. The main body 2 and the lid 3 are connected along the long sides of the rectangle.

Container 1 accommodates a plurality of eggs. The number of eggs is arbitrary, for example, 4, 6, 8, 10, 12, etc., and preferably in two rows in parallel. In this embodiment, there are 10 pieces, 5 pieces per row, and a total of 10 pieces in 2 rows. The main body 2 has a top opening shape. The main body 2 has an egg accommodating part 5 in which the lower part of the egg is accommodated. The egg storage section 5 is open on the upper side. The egg storage units 5 are provided as many as the number of eggs to be stored, and in this embodiment, ten egg storage units 5 are provided. The lid body 3 covers the upper part of the eggs stored in the egg storage section 5 in the closed state.

The container 1 is provided with a label attachment section 6. The position, size, shape, etc. of the label attachment section 6 are arbitrary. In this embodiment, the label attachment section 6 is provided on the main body 2. Specifically, the label attachment section 6 is provided on the side surface of the short side of the main body 2. The label attachment section 6 is provided on the upper part of the side surface. The label attachment section 6 is preferably a flat surface, but may be uneven to the extent that it does not interfere with the attachment of the label 10. If the label attachment section 6 is uneven, the label 10 can be easily peeled off from the label attachment section 6 when the consumer separates and disposes of the container 1. The uneven shape may be various, for example, granular protrusions or lattice-shaped ribs. The label attachment section 6 is preferably a vertical surface having a normal line along the horizontal direction. The label attachment section 6 is a rectangular shape that is long in the horizontal direction.

A label 10 is attached to the outer surface of the label attachment section 6. A barcode 41 is printed on the label 10. However, the label 10 attached to the container 1 is in an unprinted state with no barcode 41 printed thereon. An unprinted label 10 on which a barcode 41 is not printed is attached to the label attachment part 6. The label 10 has a horizontally long rectangular shape. It is preferable that the label sticking part 6 corresponds to the shape of the label 10. The size of the label sticking part 6 is slightly larger than the size of the label 10. The color of the label 10 is, for example, white, although it is not particularly limited. The color of the label 10 serves as a background color for the barcode 41 printed thereon, and has enough contrast to allow the printed barcode 41 to be read by a barcode reader. The label 10 may have a plurality of colors as long as it provides a contrast with the barcode 41. Further, the label 10 may have a pattern or characters.

The main body 2 and the lid 3 are integrally formed from a single transparent synthetic resin sheet, and the eggs inside can be visually recognized from the outside. The container 1 is formed by so-called sheet molding. Examples of sheet forming include vacuum forming, pressure forming, vacuum pressure forming, double-sided vacuum forming, hot plate forming, etc. In any case, the sheet is formed by thermoforming a synthetic resin sheet. Examples of the synthetic resin sheet include sheets made of polyester resins such as polyethylene terephthalate, styrene resins such as polystyrene, polyolefin resins such as polypropylene and polyethylene, and stretched sheets obtained by stretching these materials. It will be done. Among these, stretched sheets are particularly preferred because their transparency and strength are improved by the stretching process.

A release agent is applied to the synthetic resin sheet. A mold release agent is attached to the surface of the sheet-molded container 1. This mold release agent allows the stacked containers 1 to be easily separated and supplied one by one in the container supply process of the packing center. FIG. 3 shows the container 1 without the label 10 attached. An unprinted label 10 on which a barcode 41 is not printed is attached to the label attachment part 6 of the container 1 after sheet forming, thereby forming the container 1 shown in FIGS. 1 and 2. The unprinted label 10 is an area formed on the container 1 for printing a barcode. A barcode printing area is formed on the container 1 by pasting an unprinted label 10 on which the barcode 41 is not printed onto the label pasting portion 6 of the container 1 after sheet forming. The step of attaching the unprinted label 10 to the container 1 is an area forming step of forming a barcode printing area on the container 1.

FIG. 4 shows the egg packaging 7. In the egg package 7, the container 1 is sealed with a sealing tape 11. The method for manufacturing the egg packaging body 7 includes a container manufacturing process of manufacturing the container 1, a container supplying process of supplying the open container 1 to a transport line, and an egg storage process of storing eggs in the container 1 on the transport line. Then, on the conveyance line, there is a container sealing process in which the container 1 in which eggs are stored is sealed, a printing process in which the barcode 41 is printed on the label 10 of the container 1, and a container 1 sealed in the container sealing process is transferred to the conveyance line. The sealed container is transferred to the outer collection station 32. The container manufacturing process includes a container molding step in which the container 1 is molded from a synthetic resin sheet coated with a mold release agent, and an unprinted label 10 is pasted on the label pasting part 6 of the molded container 1. The method includes an area forming step of providing a barcode printing area on the surface of the container 1. The container supply process includes a container setting process in which a plurality of containers 1 with open lids are set in a stacked state at a container station 31 near the conveyance line, and a container setting process in which a plurality of containers 1 with open lids are set in a stacked state at a container station 31 near the conveyance line, and a supply side of the plurality of containers 1 stacked in the container station 31. The method includes a container transfer step of sequentially transferring the containers 1 from the tip end to the transfer line.

The outline of the manufacturing process of the egg packaging body 7 will be explained. For the sake of simplicity, there are three sizes of eggs: S size, M size, and L size. A container maker manufactures container 1 as described above. An unprinted label 10 is attached to the container 1. The container manufacturing process is performed by the container manufacturer. A container maker manufactures and stores S-sized containers 1a, M-sized containers 1b, and L-sized containers 1c. An unprinted label 10 is attached to each of the S size container 1a, the M size container 1b, and the L size container 1c. An unprinted label 10 attached to the S size container 1a, an unprinted label 10 attached to the M size container 1b, and an unprinted label 10 attached to the L size container 1c. The labels 10 in the printed state are all the same. That is, only one type of unprinted label 10 is required. Only one type of S-sized container 1a to which an unprinted label 10 is attached is required, and only one type of M-sized container 1b to which an unprinted label 10 is attached. Only one type of L-sized container 1c to which the label 10 is attached is required. The container manufacturer only needs to store and stock one type of containers 1a, 1b, and 1c of each size. In this way, the number of types of containers 1 can be significantly reduced, and the effort involved in storing and managing containers 1 can also be significantly reduced.

Figures 5 to 9 show an overview of the manufacturing process at the packing center. 5 and 6 are plan views of the manufacturing line. A container manufacturer receives an order from a producer and delivers containers 1 of each size to a packing center. For example, a container manufacturer brings in an S-sized container 1a, an M-sized container 1b, and an L-sized container 1c. A barcode 41 is not printed on the label 10 of the container 1. For any order from any producer, the same S-sized container 1a, M-sized container 1b, and L-sized container 1c may be brought in. Therefore, delivery costs are also reduced. Further, the effort and cost of receiving and managing the containers 1 at the packing center are also reduced.

The container supply process, the egg storage process, the container sealing process, the sealed container transfer process, and the printing process are performed at the packing center. The packing center includes a first conveyance line 20 and a second conveyance line 30. The first conveyance line 20 is a conveyance line that sorts eggs by size. The second conveyance line 30 is a conveyance line that packs eggs into containers 1 and seals them. 5 shows the first transport line 20, and FIG. 6 mainly shows the second transport line 30. Eggs are supplied to the most upstream portion of the first conveyance line 20. The eggs are, for example, specific eggs from Producer A. An example of what is shown in FIG. 16 is the eggs of producer A's Shiratama bait α. Egg sizes are mixed. That is, S-sized eggs, M-sized eggs, and L-sized eggs are supplied to the first conveyance line 20 in a mixed state.

The first conveying line 20 conveys eggs on a conveyor. The eggs are conveyed downstream of the first conveying line 20 by the conveyor. The first conveying line 20 is equipped with a washing device 21 that washes the eggs and a sorting device 22 that sorts the eggs by size. The unsorted eggs supplied to the first conveying line 20 are sent to the washing device 21. The eggs are washed in sequence in the washing device 21 and transported downstream. The eggs are then sent to the sorting device 22. In the sorting device 22, the unsorted eggs are separated by size. The unsorted eggs are separated into small, medium, and large eggs and transported downstream. After the eggs are washed, there are processes such as inspecting the eggs and measuring their weight, but illustrations and explanations of these are omitted.

A second conveyance line 30 is installed near the most downstream part of the first conveyance line 20. The second conveyance line 30 places eggs in the container 1 on a conveyor and conveys the eggs downstream. The most upstream part of the second conveyance line 30 is located near the most downstream part of the first conveyance line 20, for example. A container station 31 is provided near the most upstream portion of the second conveyance line 30 . In the container station 31, containers 1 are set in a stacked state. Containers 1 are set according to size. That is, each of the S-sized container 1a for storing S-sized eggs, the M-sized container 1b for storing M-sized eggs, and the L-sized container 1c for storing L-sized eggs, respectively. Set. Since it is sufficient to set the same container 1 for eggs from any producer, the possibility of setting the container 1 by mistake is reduced, and the time and effort required for setting can be reduced. Although the container stations 31 are shown in FIG. 6 as being lined up next to the second transport line 30, they are actually provided above the second transport line 30, as shown in FIG. Hereinafter, as a representative example, a case will be described in which M-sized eggs are accommodated in the M-sized container 1b.

As shown in FIG. 7, the container 1b is set in the container station 31 with its lid open. Although not shown, the same applies to the S size container 1a and the L size container 1c. A plurality of containers 1b are stacked with the openings facing upward. The stacked containers 1b are sequentially supplied to the second conveyance line 30 from the container 1b at the tip of the supply side, that is, the container 1b located at the lowest position. Specifically, the lowest container 1b among the stacked containers 1b is pulled downward by a suction unit (not shown) and dropped onto the second conveyance line 30. The container 1b is placed on the second conveyance line 30 in an open state with the opening facing upward.

A barcode 41 is printed on the label 10 at the container station 31. Note that the type of barcode 41 does not matter. For example, it may be a two-dimensional barcode. The container station 31 is provided with a printing device (not shown) for printing the barcode 41. The printing method is not limited, but may be, for example, inkjet. The head 40 of the printing device is installed corresponding to the lowermost container 1b. For example, the head 40 is waiting horizontally next to the lowermost container 1b. When printing the barcode 41 on the label 10, the head 40 approaches the lowermost container 1b from a standby position and prints the barcode 41 on the label 10. For example, the head 40 slides in the horizontal direction. After printing, the head 40 returns to its original standby position. After the barcode 41 is printed, the lowermost container 1b is transferred to the second conveyance line 30. A barcode 41 is printed on the label 10 of the container 1b transferred to the second transport line 30. The barcode 41 has, for example, meaning an M-sized egg of producer A's white egg feed α. The settings of the print content can be changed arbitrarily on the printing device. The label 10 of the S-sized container 1a is printed with a barcode 41 that means S-sized eggs with white egg feed α from producer A, and the label 10 of the L-sized container 1c is printed with a barcode 41 indicating the production A barcode 41 is printed that means L-sized eggs of person A's white egg food α. The barcode 41 has contents depending on the producer, the color of the eggs, the type of feed, etc. Preferably, one head 40 of the printing device is installed for each size of containers 1a, 1b, and 1c.

After the barcode 41 is printed on the label 10 of the lowermost container 1b, the lowermost container 1b is supplied to the second conveyance line 30. When the lowermost container 1b is supplied to the second conveyance line 30, the container 1b located immediately above the lowermost container 1b becomes the next lowermost container 1b. Then, the head 40 approaches the lowermost container 1b again and prints the barcode 41 on the label 10 of the lowermost container 1b. Such operations are repeated. Since the container 1b is stopped and positioned, the barcode 41 can be easily and accurately printed on the label 10. In addition, since a barcode 41 is attached to the empty container 1b immediately before being supplied to the second conveyance line 30, immediately after that, the eggs stored in the second conveyance line 30 are checked to match the type and content of the eggs stored in the container 1b. It has the advantage of being easy to obtain.

The container 1b transferred to the second conveyance line 30 is conveyed downstream on the second conveyance line 30. As shown in FIGS. 8 and 9, M-sized eggs are transferred from the first transfer line 20 to the container 1b on the second transfer line 30. For example, 10 medium-sized eggs are transferred from the first conveyance line 20 to the second conveyance line 30, and the 10 eggs are collectively stored in the main body 2 of the container 1b on the second conveyance line 30. Ru. Thereafter, the lid 3 of the container 1b is closed, and the container 1b is sealed with the sealing tape 11, completing the egg package 7 as shown in FIG. Note that the sealing method may be thermal welding or ultrasonication. The egg packaging body 7 is conveyed to the most downstream part of the second conveyance line 30, and is conveyed from the most downstream part to the collection station 32 outside the second conveyance line 30. At the collection station 32, a plurality of egg packages 7 are collected and temporarily stored. Thereafter, the egg package 7 is shipped to a supermarket or the like. Note that after the eggs are placed in the container 1, there is a step of including a product label, a step of displaying an expiration date, etc., but illustrations and explanations thereof will be omitted.

In this embodiment, the barcode 41 is printed on the label 10 of the container 1 at the container station 31, but the printing process of printing the barcode 41 on the label 10 of the container 1 may be performed at various timings. For example, the barcode 41 may be printed on the label 10 of the container 1 before the container setting step. As shown in FIG. 10, a barcode 41 may be printed on the label 10 of the container 1 before it is set in the container station 31. After the container 1 is delivered to the packing center from the container manufacturer, a barcode 41 is printed on the label 10 of the container 1 before it is set in the container station 31, and after printing, the container 1 is set in the container station 31. Good too.

Moreover, the barcode 41 may be printed on the label 10 of the container 1 which is on the second conveyance line 30 and is sealed in the container sealing process. As shown in FIG. 11, a printing device may be provided at the most downstream part of the second conveyance line 30. The label 10 remains unprinted until the most downstream part of the second conveyance line 30, and the barcode 41 is printed on the label 10 of the container 1 conveyed to the most downstream part of the second conveyance line 30. In that case, it is preferable to temporarily stop the container 1 at the most downstream part of the second conveyance line 30 and print the barcode 41 on the label 10 of the container 1 in the stopped state.

Further, the barcode 41 may be printed on the label 10 of the container 1 after the sealed container transfer step. The barcode 41 may be printed on the label 10 of the container 1 transferred to the outside of the second conveyance line 30. For example, as shown in FIG. 12, the collection station 32 may be equipped with a printing device. The barcodes 41 may be sequentially printed on the containers 1 collected at the collection station 32.

Incidentally, on the second transport line 30, for example, the barcode 41 may be printed on the label 10 of the empty container 1 placed on the second transport line 30 from the container station 31, or the bar code 41 may be printed on the label 10 of the empty container 1 placed on the second transport line 30 from the container station 31. The barcode 41 may be printed on the label 10 of the container 1 after the eggs are contained and before the container 1 is sealed. In this way, the timing at which the barcode 41 is printed on the label 10 of the container 1 may vary.

Incidentally, the position of the label sticking part 6 in the container 1 may also be changed in various ways. For example, as shown in FIG. 13, a label sticking section 6 may be provided on the side surface of the main body 2 on the long side. The label sticking part 6 may be provided on the lid body 3 instead of the main body 2. For example, as shown in FIG. 14, a label sticking part 6 may be provided on the side surface of the short side of the lid body 3. A label sticking section 6 may be provided on the long side surface of the lid body 3. Further, as shown in FIG. 15, a label sticking part 6 may be provided on the top surface of the lid 3.

In the above embodiment, the barcode printing area is formed on the container 1 by pasting the unprinted label 10 on the container 1, but the barcode printing area is formed on the container 1 by pasting other members other than the label 10 on the container 1. An area for code printing may also be formed. Alternatively, by removing part of the release agent from the container 1, the removed part may be used as a barcode printing area. A part of the container 1 may be provided with an uncoated part where no release agent is applied, and the uncoated part may be used as a barcode printing area.

1 container (egg container)
1a S size container 1b M size container 1c L size container 2 Main body 3 Lid 4 Hinge part 5 Egg storage part 6 Label sticking part 7 Egg package 10 Label 11 Sealing tape 20 First conveyance line 21 Washing device 22 Sorting device 30 Second conveyance line 31 Container station 32 Collection station 40 Head 41 Barcode

Claims (1)

A method for manufacturing an egg package in which a plurality of eggs are housed in an egg container made of a synthetic resin sheet, the method comprising:
An egg container comprising a main body having a plurality of egg accommodating parts and a lid rotatably formed integrally with the main body via a hinge part, the egg container having a label sticking part on the side surface of the main body or the lid. A barcode can be printed by a container molding process in which an egg container is molded from a synthetic resin sheet coated with a release agent, and an unprinted label is attached to the label attachment part of the molded egg container. an area forming step for providing a barcode printing area on the surface of the egg container;
an egg supplying step of supplying and conveying a specific type of eggs produced by a specific producer to a first conveyance line;
A container setting step in which a plurality of egg containers with open lids are stacked at a container station near the second conveyance line with their openings facing upward; A container transfer step in which the egg container is sequentially transferred to a second transfer line, and before the lower egg container is transferred to the second transfer line, a label on the lower egg container is attached to the first transfer line in the egg supply step. a printing step of printing a barcode indicating that the eggs conveyed by the container are of the specific type;
an egg storage step of storing the specific type of eggs transported by the first transport line in the egg container transported to the second transport line;
a container sealing step of sealing the egg container containing the specific type of eggs in a second conveyance line;
A method for manufacturing an egg package, comprising: a sealed container transfer step of transferring the egg container sealed in the container sealing step to the outside of a second transfer line.

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