JP4599861B2 - Sealable container headspace gas replacement nozzle and gas replacement method using the same - Google Patents

Description

  The present invention relates to a sealable container headspace gas replacement nozzle and a gas replacement method thereof used for replacing gas in a container headspace when filling a sealed container with contents.

  A liquid paper container such as a gable-top type used in liquor containers or milk containers inevitably creates a head space as a space portion without liquid content in the container, so that the oxygen content in the head space There may be a problem that changes in quality under the influence of.

  As a solution to this problem, a method of injecting a replacement gas such as nitrogen or carbon dioxide other than oxygen into the head space and replacing it with air containing oxygen in the space has been conventionally used.

  As a conventional gas replacement method, a method of spraying a replacement gas such as nitrogen gas into the container immediately before filling the contents, or a method of spraying a replacement gas into the head space of the container immediately after filling the contents and immediately before the top seal Etc. are known.

  However, for example, when a container is filled with foamy liquid content, in the gas replacement method only after filling, it is held (included) inside the foamed portion generated in the filling by the entrainment of air during filling. Air is discharged again into the sealed head space after the gas replacement is completed, and as a result, the gas replacement efficiency in the head space is deteriorated.

  However, when filling a foamy content, air is held inside the foam, and the gas replacement of the foam portion is not sufficiently performed. Therefore, in the conventional gas replacement method, the oxygen concentration in the head space is 10 to 10%. It can only be reduced to about 12%.

  In addition, in the conventional gas replacement method only after filling, the oxygen concentration in the head space is usually reduced even in the case of a packing with little foaming or a packing with little foaming. It could only be lowered to about 5-6%.

  In this way, when oxygen remains in the head space of the sealed container, the filling is oxidized by the remaining oxygen and deteriorates.

  Therefore, as a gas replacement method for the container head space in which the air in the head space of the container filled with the contents is replaced with a replacement gas such as nitrogen gas or carbon dioxide gas, it is described in JP-A-5-330515. In addition, there are the following gas replacement methods for reducing the oxygen concentration in the head space of the container after filling the contents as much as possible.

  From the content filling step of the filling machine to the top seal (sealing seal) step in the gas replacement method, for example, as shown in the schematic side view of FIG. Immediately prior to filling gas replacement step 1) in which the replacement gas g is blown immediately before, the content filling step 2) in which the content a is filled from the top portion T that is opened, and the container top portion T that has been opened is temporarily folded. Folding step 3) and a gas replacement step 4 immediately before the top seal in which the sealing seal position of the top portion T of the container 1 is heated and the replacement gas g is blown into the head space H of the container 1 immediately before the top portion T is hermetically sealed. ), A top sealing step 5), and a container discharging step 6).

  As shown in FIG. 6, the gas replacement method is as follows. First, the sealing container 1 such as a paper container such as a gable top type used for an unfilled liquor container or milk container formed and sealed with the container bottom B, In an empty state with the container top portion T opened, it is transported to the gas replacement step 1) immediately before filling, and is transported directly under the gas replacement nozzle 2 for spraying the replacement gas.

A replacement gas g such as nitrogen gas N ₂ or carbon dioxide gas CO ₂ is blown into the container 1 by the gas replacement nozzle 2 so as to replace the air inside the unfilled container 1. Spraying pressure is, for example, 1kg / cm ² ~5kg / cm ² approximately. The gas replacement just before filling may use a replacement gas that is vaporized using a liquefied gas such as liquid nitrogen.

  Next, the container 1 is transported to the content filling step 2), and the liquid 1 (which may contain a solid) content a is filled into the container 1 from the content filling nozzle 3.

  Subsequently, the head 5 in the container 1 after the filling is transported to a temporary folding step 3) having a temporary folding means 6 (manipulator or the like) in a state where the bubbles 5 taking in the replacement gas g are held. Is done. In this temporary folding step 3), the container top portion T in the opened state is temporarily folded (in the drawing, the container top portion T in the opened state is temporarily folded in the closing direction), and then the container 1 is moved in the transport direction. It is conveyed in the direction of the sealing and sealing step 5) provided with the sealing and sealing means 8 (heat and pressure sealing means such as a sealing jaw) on the downstream side.

In the gas replacement step 4) immediately before the top seal during the conveyance or the sealing seal step 5), nitrogen gas N ₂ , carbon dioxide gas CO _2, etc. are introduced into the head space H of the container 1 immediately before the sealing by the gas replacement nozzle 7. The replacement gas g is sprayed at a spraying pressure of about 0.3 kg / cm ² to ⁴ kg / cm ² to perform gas replacement, and the replacement gas g replaced by the gas replacement nozzle 7 is retained in the head space H. In the meantime, the hermetically sealing means 8 of the top sealing step 5) performs the hermetic sealing of the upper folded end portion T ₁ of the container top portion T (the inner sealant layer of the container 1 is heated and pressure bonded to each other). A liquid-filled sealed container 1 in which the inside of the head space H is replaced with gas is manufactured. And the container 1 is conveyed by the discharge process 6), and is discharged | emitted by the discharge | emission means suitably.

Moreover, as a measure for increasing the gas replacement efficiency of the container head space H, it is necessary to keep the flow rate of the blown-out replacement gas low, but the flow rate from the blow-off nozzle must be kept uniform when blown out from the pipe. For example, even if the speed is lowered, the gas speed is high in the central portion of the top portion T of the container 1, the gas spreads in the direction of the inner wall surface of the container 1, and the flow velocity is reduced near the inner wall surface. As a result, there has been a problem that the replacement efficiency is not increased, and the amount of the replacement gas used is increased to increase the running cost.
JP-A-5-330515

  An object of the present invention is to improve the gas replacement nozzle for gas replacement with a replacement gas such as nitrogen gas or carbon dioxide gas, thereby blowing out in the central portion of the container top portion and the head space and in the vicinity of the inner wall surface of the container. In addition to making the speed of the replacement gas uniform, in the gas replacement process after filling the container with the contents, air in the head space of the container, a filling with less foaming, or foaming is generated. It is possible to replace the air retained inside the foam in the almost-filled or foam-filled foam uniformly and reliably with a gas other than oxygen, and by the oxygen remaining in the head space of the sealed container. The purpose is to prevent the packing from being oxidized or deteriorated.

According to the first aspect of the present invention, the gas replacement step immediately before filling the contents and the gas replacement step immediately before sealing the top seal part, nitrogen other than oxygen and carbon dioxide in the container using a gas replacement nozzle. In a hermetically sealed container headspace gas replacement nozzle that blows a replacement gas such as gas in the headspace in the container to replace the gas in the headspace immediately before filling the contents and immediately before sealing the top seal part Two or more mesh-like mesh sheets that are superposed on one or both of the gas outlets of the gas replacement nozzle used in one or both of the gas replacement processes, and the planar shape of the container top opening And a blow adjustment plate having a predetermined pattern of blow holes that are similar to the above are attached in this order in the blow direction, and the mesh sheet and the blow adjustment plate are passed through. A sealable container headspace gas replacement nozzles, characterized in that the gas replacement by blowing replacement gas into the container.

The invention according to claim 2 of the present invention includes a gas replacement step immediately before filling the contents and a gas replacement step immediately before sealing the top seal portion, and using a gas replacement nozzle, nitrogen other than oxygen and carbon dioxide in the container In a sealing container headspace gas replacement method in which a replacement gas such as the above is blown to replace the headspace in the container with a replacement gas, the gas replacement process immediately before filling the contents and the top seal portion immediately before sealing Approximate the planar shape of one or more mesh mesh sheets and two or more mesh mesh sheets and the container top opening at the gas outlet of the gas replacement nozzle used in one or both of the gas replacement processes. A blowing adjustment plate with a predetermined pattern of blowing holes is attached in this order in the blowing direction, and replaced in the container through the mesh sheet and the blowing adjustment plate. By blowing a scan, a sealable container headspace gas replacement method, characterized by gas replacement.

  According to the hermetically sealed container headspace gas replacement nozzle of the present invention and the gas replacement method using the gas replacement nozzle, the gas replacement nozzle main body 15 (nozzle main body), which is the gas outlet, is overlapped by one or two. Since several or more mesh mesh sheets 16 are attached, from the nozzle body 15 through the two or more mesh sheets 16 into the head space H of the top T of the container 1 filled with the contents, A replacement gas g such as nitrogen or carbon dioxide is blown.

  Then, the replacement gas g blown toward the mesh sheet 16 while expanding from the nozzle body 15 is finely divided and dispersed while passing through a large number of fine pores 16 a of the mesh sheet 16. The replacement gas g blown into the head space H through the air is blown into the head space H as a uniform replacement gas stream.

  Therefore, the velocity of the replacement gas g blown out in the central portion in the top portion T and the head space H of the hermetic container 1 and in the vicinity of the inner wall surface of the container 1 can be made uniform. The air in the head space H of T, the filling a with little foaming, the filling a with little foaming, or the air held inside the large and small bubbles in the filling a with much foaming It can be replaced uniformly and reliably with a gas such as nitrogen or carbon dioxide other than oxygen, and the filling material a may be oxidized or deteriorated by oxygen remaining in the head space H of the sealed container 1. Can not be.

  Further, according to the hermetically sealed container headspace gas replacement nozzle of the present invention and the gas replacement method using the gas replacement nozzle, one or more sheets are superposed on the gas replacement nozzle body 15 (nozzle body) which is a gas outlet. Since two or more mesh-like mesh sheets 16 and a blowing adjustment plate 20 having a predetermined pattern of blowing holes 21 approximating the planar shape of the opening of the top T of the container 1 are attached. From the main body 15, the top T of the container 1 filled with the contents is passed through two or more mesh sheets 16 and a blowing hole 21 having a predetermined pattern approximating the planar shape of the opening of the top T of the blowing adjustment plate 20. In the head space H, a replacement gas g such as nitrogen and carbon dioxide is blown.

  Then, the replacement gas g blown toward the mesh sheet 16 while expanding from the nozzle body 15 is finely divided and dispersed while passing through a large number of fine pores 16 a of the mesh sheet 16. The replacement gas g blown out in the direction of the blow adjustment plate 20 through the blow holes 21 in a predetermined pattern that approximates the planar shape of the opening of the top T of the container 1 of the blow adjustment plate 20 as a uniform replacement gas stream. To reach.

  Then, the uniform replacement gas stream that has reached the blowing hole 21 passes through the blowing hole 21 as a replacement gas stream having a shape that approximates the planar shape of the opening of the top T of the container 1. It is sprayed uniformly inside, and it is sprayed evenly along the inner surface of the container 1 of the head space H.

  Therefore, the speed of the replacement gas g blown out in the central portion in the top portion T and the head space H of the hermetic container 1 and in the vicinity of the inner wall surface of the container 1 can be made uniform. The speed of the replacement gas g blown out in the central portion of the top portion T and the head space H of the hermetic container 1 such as a paper container such as a gable top type and the inner wall surface of the container 1 can be made uniform. , The air in the head space H of the container 1, the filling a with less foaming, the packing a with little foaming, or the large and small bubbles in the filling a with much foaming. Air can be uniformly and reliably replaced with a gas g such as nitrogen or carbon dioxide other than oxygen, and can be uniformly blown to the inner surface of the container 1 of the head space H. The air held in the head space H portion adjacent to the inner surface of the container 1 and the foam of the filler a can be uniformly and reliably replaced with a gas g such as nitrogen or carbon dioxide other than oxygen, and after sealing It is possible to prevent the filling material a from being oxidized or deteriorated by oxygen remaining in the head space H of the container 1.

1 is a front cross-sectional view of FIG. 1, a side view of FIG. 2, a top cross-sectional view of AA of FIG. 3A, and FIG. This will be described in detail below based on a cross-sectional top view of BB. In addition, the gas replacement nozzle shown in FIG. 1 shows a double system, and in the present invention, only the single-type gas replacement nozzle shown on either the left side or the right side of FIG. 1 may be used.

  As shown in FIGS. 1 and 2, the hermetic container headspace gas replacement nozzle 11 of the present invention includes a truncated cone-shaped or trapezoidal gas replacement nozzle body 15 that is a gas outlet whose diameter is enlarged in the gas outlet direction. The replacement gas that is connected to the gas inlet 12 for flowing the replacement gas g into the nozzle body 15 and the gas inlet 12 of the gas replacement nozzle body 15 and supplies the replacement gas g to the gas replacement nozzle body 15. And a supply pipe 17. In the present invention, the portion of the gas replacement nozzle body 15 has a conventionally known structure, and it is possible to use a gas outlet nozzle body that has been conventionally used as the gas replacement nozzle body. is there.

  The replacement gas g is supplied from the replacement gas supply pipe 17 through the flow path 17a and the gas inlet 12 to the gas replacement nozzle body 15, and from the nozzle body 15 toward the opening of the top portion T of the container 1. And blown out.

  The gas replacement nozzle body 15 is integrally attached to a replacement gas supply pipe 17, and the replacement gas supply pipe 17 is attached to and supported by a holder portion 19.

  As shown in FIG. 1, the gas replacement nozzle 11 has holder parts 19 and 19 attached and fixed to two left and right parts of a horizontal frame 18 as shown in FIG. By attaching a gas replacement nozzle main body 15 having an inlet 12 and a replacement gas supply pipe 17 to each other, a double system is adopted. In the case of a single system, a structure in which the horizontal frame 18 is omitted and a gas replacement nozzle body 15 having a gas inlet 12 and a replacement gas supply pipe 17 are attached to the holder portions 19 and 19 respectively. It has become.

  The gas replacement nozzle 11 according to claim 1 of the present invention is equivalent to the size of the opening portion of the top portion T opened before the hermetically sealing of the container 1 so as to cover the gas replacement nozzle body 15 with the nozzle body 15. A cover body 14 of a size or slightly smaller than that is attached, and an opening 14 a is formed immediately below the gas replacement nozzle body 15 at the tip (lower end) of the cover body 14. The shape of the bottom surface of the opening 14a at the tip of the cover body 14 may be a square shape that is a regular shape of the opening of the top T that opens before the hermetic container 1 is hermetically sealed, Or the shape corresponding to the planar shape with the crease | fold of the opening part of the top part T to open before a sealing seal | sticker may be sufficient. Moreover, the shape approximated to the shape of the blowing hole 21 as shown to Fig.5 (a)-(h) mentioned later may be sufficient.

  In the cover body 14, immediately below the gas replacement nozzle main body 15, one mesh sheet 16 is horizontally aligned, or two or more mesh-like mesh sheets 16 are superimposed on each other in the horizontal direction. It is attached. Although the fineness of the mesh of the mesh sheet 16 to be used is not particularly limited in the present invention, for example, a preferable mesh value is 60 to 120 mesh (mesh / inch).

  When two or more mesh-like mesh sheets 16 are overlapped, the mesh sheets 16 may be overlapped with a predetermined interval, and the mesh sheets 16 may be in surface contact with each other. It may be superposed in a state, or both. Note that the mesh sheets 16 used in an overlapping manner may be sheets having the same mesh value, or may be used in combination with sheets having different mesh values. For example, when four mesh sheets 16 are used in an overlapping manner, it is appropriate to use 60 mesh, 80 mesh, 100 mesh, and 120 mesh in order from the uppermost mesh sheet 16.

  As described above, the gas replacement nozzle 11 according to the first aspect of the present invention is sealed with a paper container such as a gable top type used for an unfilled liquor container or a milk container having a sealed body and bottom. With the container top portion T of the conductive container 1 opened, the replacement gas g supplied through the replacement gas supply pipe 17 after being brought close to the top portion T of the container 1 before the hermetic sealing is opened. Is sprayed from the gas displacement nozzle body 15 and sprayed into the head space H of the top portion T opened before the hermetic sealing of the container 1 through one or more mesh sheets 16 having a large number of pores. The air in the head space H is replaced with gas.

  1 is a front cross-sectional view of FIG. 1, a side cross-sectional view of FIG. 2, a top cross-sectional view of AA of FIG. 3A, and FIG. If the gas replacement nozzle 11 is described in detail below with reference to the cross-sectional top view of B-B, the gas replacement nozzle body 15 has an opening before the hermetically sealed container 1 so as to cover the nozzle body 15. A cover body 14 having a size equivalent to or slightly smaller than the size of the opening portion of the top portion T to be attached is attached, and the front end portion (lower end portion) of the cover body 14 is directly below the gas replacement nozzle body 15. An opening 14a is formed. The bottom surface shape of the opening 14 a at the tip of the cover body 14 is a quadrangle that is a regular shape of the opening of the top portion T that is opened before the hermetic container 1 is hermetically sealed.

  In the cover body 14, immediately below the gas replacement nozzle main body 15, one mesh sheet 16 is horizontally aligned, or two or more mesh-like mesh sheets 16 are superimposed on each other in the horizontal direction. A cover body 14 is attached.

  When two or more mesh-like mesh sheets 16 are overlapped, the mesh sheets 16 may be overlapped with a predetermined interval, and the mesh sheets 16 may be in surface contact with each other. It may be superposed in a state, or both.

  And the opening 14a of the front-end | tip part (lower end part) of this cover body 14 has the blowing hole (after-mentioned) of the predetermined shape pattern approximated to the planar shape of the opening part of the top part T which the container 1 opens before the sealing seal. A blow-out adjusting plate 20 provided with holes is attached.

  Thus, the gas replacement nozzle 11 according to claim 2 of the present invention has a large number of pores by injecting the replacement gas g supplied from the replacement gas supply pipe 17 from the gas replacement nozzle body 15. The air in the head space H is blown through the one or more mesh sheets 16 and the blowout holes of the blow adjustment plate 20 into the head space H of the top portion T opened before the container 1 is hermetically sealed. Is replaced with gas.

  4 (a) is a cross-sectional view of the C-C bottom surface of one embodiment including the blowing adjustment plate 20 of the gas replacement nozzle 11 according to claim 2 of the present invention, and FIG. 4 (b) is a claim of the present invention. It is CC lower surface sectional drawing of the other Example containing the blowing adjustment board 20 of the said gas replacement nozzle 11 which concerns on claim | item 2.

  The shape of the blowout hole 21 of the blowing adjustment plate 20 attached to the opening 14a at the lower end of the cover body 14 is, for example, when the planar shape of the top portion T opened before sealing and sealing the container 1 is substantially circular. 4 (a), the blowing hole 21 of the blowing adjustment plate 20 has a substantially circular shape that approximates the planar shape of the opening top portion T (or has a shape that is substantially similar to the planar shape of the opening top portion T). Is formed. Moreover, as shown in FIG.4 (b), the blowing hole 21 of the blowing adjustment plate 20 is formed in the W shape.

In addition, as the hole opening shape of the blowing hole 21 in the blowing adjustment plate 20, FIG.
) To (h), for example, a circular shape as shown in FIG. 5A, an elliptical shape as shown in FIG. 5B, or a regular square round shape as shown in FIG. The shape of the regular square shape of the top portion T of the container 1 that is opened before sealing and sealing may be used, but the top portion T that is opened before sealing and sealing may be used. It can be formed in a deformed shape corresponding to a planar shape with a crease, for example, a shape as shown in FIGS.

  Next, a gas replacement method according to a third aspect of the present invention includes a front cross-sectional view of the gas replacement nozzle shown in FIG. This will be described in detail below based on the schematic side view of FIG.

  In the gas replacement method according to claim 3 of the present invention, as shown in FIG. 6, the inside of the head space H of the top portion T of the hermetic container 1 filled with the contents is made of nitrogen other than oxygen, carbon dioxide gas, etc. This is a hermetically sealed container headspace gas replacement method in which gas is replaced with a replacement gas g, a gas replacement step 1) just before filling the contents immediately before filling the contents, and a gas replacement step 4) immediately before the top seal immediately before the top seal portion. The gas replacement nozzle 2 or the gas replacement nozzle 7 used in any one of the gas replacement process 1) and the gas replacement process 4), or both of the processes 1) 4) are included. As the gas replacement nozzle 2 and the gas replacement nozzle 7, a single gas replacement nozzle 11 according to the first aspect of the present invention shown in FIG. Layered The replacement gas g is blown into the hermetic container 1 through two or more mesh mesh sheets 16 and the air in the head space H of the hermetic container 1 is changed to nitrogen other than oxygen, carbon dioxide gas, etc. This is a replacement method of substituting with the replacement gas g.

  In the gas replacement method according to claim 4 of the present invention, as shown in FIG. 6, the inside of the head space H of the top portion T of the hermetic container 1 filled with the contents, such as nitrogen other than oxygen, carbon dioxide gas, etc. This is a hermetically sealed container headspace gas replacement method in which gas is replaced with a replacement gas g, a gas replacement step 1) just before filling the contents immediately before filling the contents, and a gas replacement step 4) immediately before the top seal immediately before the top seal portion. Gas replacement nozzle 2 or gas replacement nozzle 7 used in any one of the gas replacement step 1) and gas replacement step 4), or the gas used in both steps 1) 4) As the replacement nozzle 2 and the gas replacement nozzle 7, a single gas replacement nozzle 11 according to claim 2 of the present invention shown in FIG. 1 described above is attached, and one or a stack attached to the gas outlet 15 of the gas replacement nozzle 11. Together The sealed container 1 is passed through two or more mesh-like mesh sheets 16 and a blowing adjusting plate 20 having a predetermined pattern of blowing holes 21 approximating the planar shape of the opening of the top T of the container 1. This is a replacement method in which a replacement gas g is blown in to replace the air in the head space H of the hermetic container 1 with a replacement gas g such as nitrogen or carbon dioxide other than oxygen.

  As a gas replacement method according to claim 3 or claim 4, the gas replacement nozzle 2 in the gas replacement step 1) immediately before filling and the gas replacement nozzle 7 in the gas replacement step 4) immediately before the top seal are all claimed in the present invention. The case where the gas replacement nozzle 11 of the invention according to the first or second aspect is attached and gas replacement is performed will be described below.

  As shown in the schematic side view of FIG. 6, first, a rectangular tube-shaped sealing container 1 such as a paper container such as a gable top type used for an unfilled liquor container or milk container formed and sealed with a container bottom B. The gas replacement nozzle according to claim 1 or 2 of the present invention, which is transported to the gas replacement step 1) immediately before filling, with the container top portion T opened, and attached as a gas replacement nozzle 2 for spraying the replacement gas 11 (see FIG. 1). The hermetic container 1 before being carried into the gas replacement step 1) immediately before filling is appropriately sterilized using hydrogen peroxide or the like.

The gas replacement nozzle 11 attached as the gas replacement nozzle 2 allows replacement gas g such as nitrogen gas N ₂ , carbon dioxide gas CO _2, etc., to enter the gas outlet 15 of the gas replacement nozzle 11 according to claim 1 of the present invention. The number of the attached one sheet or the two or more superimposed mesh sheets 16 or the number of the one or two or more sheets attached to the gas outlet 15 of the gas replacement nozzle 11 according to claim 2 Through the mesh-like mesh sheet 16 and the blowing adjustment plate 20 provided with the blowing holes 21, the air is blown out in the central portion of the top portion T and the head space H of the container 1 and in the vicinity of the inner wall surface of the container 1. The velocity of the replacement gas g is equalized and sprayed into the container 1 so as to replace the entire air inside the unfilled container 1. Spraying pressure is, for example, 1kg / cm ² ~5kg / cm ² approximately. In the gas replacement step 1) immediately before filling, a replacement gas that is vaporized using a liquefied gas such as liquid nitrogen may be used.

  Next, the container 1 is transported to the content filling step 2), and the liquid 1 (which may contain a solid) content a is filled into the container 1 from the content filling nozzle 3.

  Subsequently, the temporary folding step including the temporary folding means 6 (manipulator or the like) in the state where the replacement gas g is taken into the head space H in the filled container 1 by the gas replacement step 1) just before the filling. It is transported to 3). In this temporary folding step 3), the container top portion T in the opened state is temporarily folded (in the drawing, the container top portion T in the opened state is temporarily folded in the closing direction), and then the container 1 is moved in the transport direction. It is conveyed in the direction of the sealing and sealing step 5) provided with the sealing and sealing means 8 (heat and pressure sealing means such as a sealing jaw) on the downstream side.

According to claim 1 or claim 2 of the present invention, the gas replacement nozzle 7 is installed in the head space H of the container 1 immediately before the sealing seal in the gas replacement process 4) immediately before the top seal as an intermediate process in the middle of the conveyance. With such a gas replacement nozzle 11 (see FIG. 1), the gas replacement nozzle 11 of the gas replacement nozzle 11 passes through one or a plurality of two or more mesh mesh sheets 16 that are attached to the gas outlet 15 or overlap each other. The center of the container 1 in the top portion T and the head space H is passed through one or a plurality of two or more mesh mesh sheets 16 and a blow adjustment plate 20 provided with blow holes 21. The rate of the replacement gas g blown out near the portion and the inner wall surface of the container 1 is made uniform so that the replacement gas g such as nitrogen gas N ₂ and carbon dioxide CO ₂ is 0.3 kg. The replacement gas g is replaced by the gas replacement nozzle 11 of the present invention attached as the gas replacement nozzle 7 in the head space H by being blown at a blowing pressure of about 4 cm / cm ^{2 to 4} kg / cm ^2. during There being held, by sealing the sealing means 8 of the top sealing step 5), hermetically sealed (container 1 inner surface sealant layer of mutually heat pressure bonding seal of the upper folded end portion T ₁ of the container top portion T) row Thus, the liquid-filled sealed container 1 in which the inside of the head space H is replaced with gas is manufactured. The container 1 is transported to the discharge step 6) and discharged by a discharge means as appropriate.

The front sectional view of the gas substitution nozzle of the present invention. The side view of the gas replacement nozzle of this invention. (A)-(b) is a top view of the gas replacement nozzle of this invention. (A)-(b) is a bottom view of the gas replacement nozzle of this invention. The top view explaining the shape of the blowing hole provided in the blowing adjustment board of the gas substitution nozzle of this invention. The outline side view of the filling sealing line of a general filling machine.

Explanation of symbols

g ... Replacement gas T ... Container top portion H ... Head space 1 ... Sealing vessel 2 ... Gas replacement nozzle 3 ... Filling nozzle 4 ... Gas replacement nozzle 7 ... Gas replacement nozzle 11 ... Gas replacement nozzle 12 ... Replacement gas intake DESCRIPTION OF SYMBOLS 14 ... Cover body 14a ... Opening part 15 ... Nozzle main body 16 ... Mesh sheet 17 ... Replacement gas supply pipe 20 ... Blowing adjustment board 21 ... Blowout hole

Claims (2)

  By a gas replacement step just before filling the contents and a gas replacement step just before sealing the top seal part, a replacement gas such as nitrogen or carbon dioxide other than oxygen is blown into the container using a gas replacement nozzle. Sealing container that replaces the inside of the head space with a replacement gas In the head space gas replacement nozzle, either or both of the gas replacement step just before filling the contents and the gas replacement step just before sealing and sealing the top seal part One or a plurality of two or more mesh mesh sheets and a predetermined pattern of blowing holes that approximate the planar shape of the container top opening are formed in the gas blowing nozzle of the gas replacement nozzle used in the above step. Are attached in this order in the blowing direction, and the replacement gas is blown into the container through the mesh sheet and the blowing adjustment plate. Sealability container headspace gas replacement nozzles, characterized in that the gas replacement.   By a gas replacement step just before filling the contents and a gas replacement step just before sealing the top seal part, a replacement gas such as nitrogen or carbon dioxide other than oxygen is blown into the container using a gas replacement nozzle. In a sealed container headspace gas replacement method in which the gas in the headspace is replaced with a replacement gas, either or both of the gas replacement process immediately before filling the contents and the gas replacement process immediately before the top seal portion is hermetically sealed. Blowing adjustment in which one or several overlapping mesh mesh sheets and a predetermined pattern of blowing holes approximating the planar shape of the container top opening are provided in the gas blowing port of the gas replacement nozzle used for A plate is attached in this order in the blowing direction, and a replacement gas is blown into the container through the mesh sheet and the blowing adjustment plate to replace the gas. Sealability container head space gas replacement method comprising and.

Images