JP3044882B2 - Paperboard sealed square container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottom structure of a paperboard sealed rectangular container provided with a resin having a low adsorptivity in the innermost layer of the container and a resin having a different heat sealing property in the outermost layer. Regarding improvement.

[0002]

2. Description of the Related Art A conventional sealed rectangular container made of paperboard is formed by laminating a heat-sealing-suitable polyethylene resin on the innermost and outermost layers of the container, or a polyester resin (polyethylene terephthalate resin) on the innermost layer of the container. A mixed resin mainly composed of an adsorptive resin or a low-adsorptive resin or a resin using a copolymer is laminated, and a resin having good heat sealing suitability by a polyethylene resin is laminated on the outermost layer of the container.

[0003] An example of a blank of the above-mentioned conventional sealed rectangular container made of paperboard will be described. As shown in FIG. 4, four side walls (1), (2), (3), and (4) are cut through a fold (a). (4) and the sticking part (5) are connected in series to form the square barrel part A.

[0004] Of the four side walls, an upper isosceles triangular plate (1) having a vertex angle of 45 ° to 90 ° via a fold (b) above the side wall (1).
4), folding plates (14a), (14a) above the isosceles of the triangular plate (14) via a fold (f), and affixing via a fold (j) above the folding plate (14a). Plates (18), (18) are connected in series, and the inner plates (18), (18)
Are connected to each other via the fold (k), and the fold is
(b) through the cover plate (15), the upper side of the cover plate (15) through the fold (j) through the fold (j), and the side wall (3) through the fold (b) through the fold (j). An upper isosceles triangular plate (16) having an apex angle of 45 ° to 90 °, and a folding plate (16) is provided above the isosceles triangular plate (16) via a fold (g).
a), (16a), and pasting inner plates (19), (19) are successively provided on the upper side of the folding plate (16a) via a fold (j), and the pasting inner plates (19), (19) ) Are connected to each other via a fold (k), the lid plate (17) is provided on the upper side of the side wall (4) via a fold (b), and the fold (j) is provided on the upper side of the lid plate (17). The upper lid B is formed by connecting the gasket-attached outer plate (21) continuously.

A lower folding isosceles triangular plate (6) below the side wall (1) via a fold (c), and a folding plate (h) below the triangular plate (6) via a fold (h). 6a), (6a), the bottom plate (7) through the fold (c) below the side wall (2), and the fold under the side wall (3).
(c) through the lower folding isosceles triangle plate (8), the triangle plate (8)
Folding plates (8a) and (8a) are provided below the isosceles via a fold (i), and a bottom plate (9) is provided below the side wall (4) via a fold (c). Polymeric sealing area (10) below the bottom plate (7), the bottom plate
(9) A bottom portion C is formed by providing an insertion seal area (11) on the lower side.

[0006] The sticking portion (5) is connected to the side wall (1), the fold plate (14a) and the fold plate (6a) through a fold a along one end of each of the fold plate and the fold plate (6a). And, the bonding portion (5) is provided with a substantially equal width two rows of outwardly folded adhesive plate (5 ') and an inner folded adhesive plate (5') through a fold d parallel to the fold a. 5 ").

[0007] In the assembly of the container using the conventional blank shown in FIG. 4, first, the four side walls (1), (2), (3),
(4) and the adhesive plate (5 ") are each bent inward, and the outwardly folded adhesive plate (5 ') is outwardly bent through the fold (d) to form an inward folded adhesive plate. (5 ") to form an adhesive plate (5) (see the plan view of the container in FIG. 5 (a)).
And the side wall (4) side end is overlapped, and the overlapped inner surface resin is heat-treated with hot air or the like, melted, clamped and adhered, and then squared as shown in FIG. 5 (b). A barrel portion A is formed.

FIG. 5 (b) shows a triangular plate (6), a bottom plate (7), a triangular plate (8), and a bottom plate (9) below the rectangular barrel portion A.
Are bent inward through folds (c). FIG.
(A) and (b) are perspective views for explaining details of folding of the bottom plate (7) and the bottom plate (9). As shown in FIG.
The triangular plate (6), the folding plates (6a), (6a), the triangular plate (8), the folding plates (8a), (8a), the bottom plate (7), and the bottom plate (9) are each folded in this order (c). The bottom plate (7) and the bottom plate (9) are turned into four sides (1), (2) and (3) by the triangular plates (6) and (8) having a vertex angle of 90 °. ) And (4) are folded flat at right angles.

Subsequently, as shown in FIG.
(7) Insert the sealing area (11) at the tip of the bottom plate (9) into the inside of the fold of the folding plates (6a) and (8a)
The overlapping seal area (10) at the tip of the bottom plate (7) is overlaid on (9). In the drawing, m indicates the overlap width of the overlapped seal area (10) and the insertion seal area (11). At that time, the bottom (9)
Before or after the insertion of the tip, the inner surfaces of each other, which are overlapped by insertion, are heated and melted with hot air or the like, and the inside of the rectangular barrel A and the bottom plate (7) and the bottom plate (9) are both outside. By further tightening, the insertion seal area (11) is adhered inside the fold of the bottom plate (7) and the folding plates (6a), (8a) on both sides thereof, and the overlapped sealing area (10) is attached to the bottom plate (9). It is stuck on the top to seal and form the bottom C in a sealed state.

By the way, the above-mentioned sealed rectangular container made of paperboard is prepared by laminating a low-adsorptive resin such as a polyester resin on the innermost layer of the container and laminating a resin having good heat sealability such as a polyethylene resin of a different kind on the outermost layer. As shown in FIG. 6 (a), the bottom plate (9) inserted into the inside of the fold of the bottom plate (7) and the folded plates (6a) and (8a) on both sides is manufactured.
The innermost resin surface of the overlapping sealing region (10) of the bottom plate (7) different from the outermost resin surface of the insertion sealing region (11) at the tip end is superimposed. As described above, since the different resins are overlapped on the heat sealing portion of the bottom portion C, a sufficient heat sealing strength cannot be obtained, and there is a concern that the impact resistance may be reduced or the sealing property of the container may be reduced. In particular, it is desired to improve the sealing property and the heat sealing strength of the bottom portion C where the load of the contents is applied.

According to the present invention, a rectangular barrel portion A and an upper lid portion B are provided.
And a bottom portion C of a sealed rectangular container made of paperboard, in which a different resin is laminated on the innermost layer and the outermost layer, respectively. The purpose is to do so.

[0012]

According to the present invention, a resin layer using a low-absorbing resin or a mixed resin mainly composed of a low-absorbing resin or a copolymer is laminated on the innermost layer of a container, and the outermost layer of the container is heated. A resin layer with good sealability is laminated and folded
(a), a rectangular barrel portion A consisting of four side walls (1), (2), (3) and (4), and folding plates (14a) and (14a) on the upper side of the side wall (1). ) And an attached inner plate (18), (18).
4) and a lid plate (1) having a palm-attached outer plate (20) on the upper side of the side wall (2).
5), side walls (3), folding plates (16a), (16a)
9), (19), an upper isosceles triangular plate (16), and side walls
(4) an upper lid portion B in which a lid plate (17) provided with a gasket-attached outer plate (21) on the upper side is connected to each other through a fold (b);
(1) Lower folding isosceles triangular plate (6) provided with folding plates (6a) and (6a) on the lower side, the side wall (2) Bottom plate (7) on the lower side, and the side wall (3)
Lower folding isosceles triangle plate with folding plates (8a) and (8a) on the lower side
(8) The bottom plate (9) is folded under the side wall (4), respectively (c).
In the sealed rectangular container made of paperboard provided with a bottom portion C connected continuously through the bottom plate, at least the bottom portion C has a superposed sealing region (10) on the tip side of the bottom plate (7) and the tip side of the bottom plate (9). Crease
(e), insert the sealing plate (12), and put the four side walls (1), (2), (3), (4) and the adhesive plate (5) inward from the fold (a), respectively. Fold and attach the adhesive plate (5) and the outer edge of the side wall (4), the bottom plate (9), the lid plate (17), and the outer panel of the joint palm (21). The barrel portion A is formed, and the triangular plates (6), (8), the bottom plate (7),
(9) are sequentially bent inward from the fold (c), and each folding plate (6
a), (6a), (8a), and (8a) are folded inward, and the insertion seal plate (12) is inserted inside the folded portion of the bottom plate (7) and the folding plates (6a) and (8a) on both sides thereof. ) Is folded back from the fold (e) and the tip of the bottom plate (9) is inserted, and the overlapping seal area (1) of the bottom plate (7) is inserted.
A sealed rectangular container made of paperboard, characterized in that a bottom portion C is formed by thermocompression-bonding the inner surface of the overlap of (0) and the insertion sealing plate (12).

[0013]

The sealed rectangular container made of paperboard according to the present invention is provided with an overlapped sealing area (10) on a bottom plate (7) constituting the bottom portion C, and an insertion sealing plate on the bottom plate (9) through a fold (e). (12) was established,
The insertion seal plate (12) is folded back and adhered to the bottom plate (9) through the fold (e), so that the insertion seal plate (12) at the insertion end of the bottom plate (9) and both sides of the back surface thereof are provided. Indicates the surface covered with the innermost layer resin (low-adsorption polyester resin).

Then, the bottom plate (9) is inserted into the folded inside of the bottom plate (7) and the folded plates (6a) and (8a) on both sides thereof,
When the bottom portion C is formed flat at right angles to the four side walls, the insertion seal plate (12) at the insertion end of the bottom plate (9) and the innermost layer resin of the container (the low-absorption polyester resin) on the back surface are: ,
The overlapping sealing area (10) on the bottom plate (7) side and the folding plates (6a), (8
a) Container innermost layer resin (low-adsorption polyester resin)
Can make opposing contact on the same resin surface as the base plate (9)
From both sides of the front end side (corresponding to the folded-back sealing plate (12)), the overlapping seal area (10) and the folding plates (6a), (8
a) can be overlapped with each other to perform heat sealing with the same resin, and thus the heat sealing strength at the bottom portion C can be enhanced.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to an embodiment. FIG. 1 (a) is a plan view of a blank used for assembling in one embodiment of the container of the present invention, and has four side walls (1), (2). ), (3),
(4) The sticking plate (5) is connected to each other through the fold (a) to form the square barrel portion A. The adhering plate (5) is, if necessary, an outer folded adhering plate (5 ') connected to the side end of the side wall (1), the folding plate (14a) and the folding plate (6a). And inward folding plate
(5 ") may be formed in two rows through the fold (d).

[0016] Of the four side walls, a fold is formed on the upper side of the side wall (1).
An upper isosceles triangular plate (14) having an apex angle of 45 ° to 90 ° through (b), and a folding plate (14a) above the triangular plate (14) via isosceles (f) and (f) , (14a), the folding plate (14a)
(j), an inner pasting plate (18), (18) is connected in series, and the pasting plate (1
8) and (18) are connected to each other via a fold (k). Further, a lid plate (15) is provided on the upper side of the side wall (2) via a fold (b), and a gasket sticking outer plate (20) is provided on the upper side of the lid plate (15) via a fold (j). .

Also, an upper isosceles triangular plate (16) having an apex angle of 45 ° to 90 ° via a fold (b) on the upper side of the side wall (3),
Folding plates (16a), (16)
a), the inner plate adhered to the upper side of the folding plate (16a) via a fold (j).
(19), (19) are connected in series, and the pasting inner plates (19), (19) are connected to each other via a fold (k).

A lid plate is formed on the upper side of the side wall (4) through a fold (b).
(17), the upper side of the lid plate (17), through the folds (j)
(21) are connected to each other to form the upper cover B.

Next, of the four side walls (1), (2), (3) and (4), a lower fold having a vertex angle of 90 ° is formed below the side wall (1) through a fold (c). An isosceles triangular plate (6), folding plates (6a) and (6a) below the isosceles of the triangular plate (6) via folds (h), and folds (c) below the side walls (2). The bottom plate (7) is connected in series, and the bottom plate (7)
Has an overlapped sealing area (10) at its lower end, and a side wall (3).
A lower folding isosceles triangular plate (8) having a vertex angle of 90 ° below the fold (c), a folding plate (8a) below the triangular plate (8) via a fold (i) below the isosceles. (8a), a bottom plate (9) below the side wall (4) via a fold (c), and an insertion seal plate (12) below the bottom plate (9) via a fold (e). To form the bottom portion C.

FIG. 1 (b) is a partial plan view of a blank used in another embodiment of the container of the present invention, and shows a bottom plate (9).
An insertion seal plate (12) is continuously provided through a fold (e)
(e) is provided with V-shaped notches (13) and (13) at both ends.

FIG. 1 (c) shows a bottom plate (9) provided with inclined portions (p), (p) on both sides of the front end portion, and a sealing plate inserted through a fold (e) at the center of the front end portion. (12).

It should be noted that either the insertion seal plate (12) or the bottom plate (9) at the portion corresponding to the inner surface of the folded portion of the insertion seal plate (12) and the bottom plate (9) in FIGS. One side,
Alternatively, it is desirable that both be cut into a suitable thickness (for example, half the thickness of the blank) and then folded and adhered.

Next, an embodiment in the case of assembling the paperboard sealed rectangular container of the present invention using the above blank will be described. First, the four side walls (1), (2), (3),
(4) and the adhesive plate (5 ") are each bent inward, and the outwardly folded adhesive plate (5 ') is outwardly bent through the fold (d) to form an inward folded adhesive plate. (5 ") to form an adhesive plate (5) (see a conventional container plan view in FIG. 5 (a)), and the adhesive plate (5), side wall (4) and lid. The edge of the plate (17) and the bottom plate (9) are overlapped, and the overlapped inner surface resin is heat-treated with hot air, melted, clamped and adhered, and the square barrel portion Form A. (See the dotted line in FIG. 2)

Before or after the formation of the rectangular barrel portion A, the insertion seal plate (12) is turned outward from the fold (e) of the bottom plate (9), and Seal plate (12) with bottom plate
(9) Laminate on the surface and paste the inner surfaces of the lamination. As a result, a resin (a low-adsorption resin such as a polyester resin) laminated on the innermost layer of the container is exposed on the inner and outer surfaces of the distal end portion of the bottom plate (9).

Subsequently, as shown in FIG. 2, the triangular plate (6), the bottom plate (7), the triangular plate (8), and the plug-in seal plate (12) below the rectangular barrel portion A are attached to the front end. Bottom plate stuck back on the part
(9) is bent inward through the respective folds (c).

FIGS. 3A and 3B show the bottom plate (7) and the bottom plate (9).
FIG. 3 is a perspective view for explaining details of folding of FIG.
As shown in (a), the triangular plate (6), the folding plates (6a), (6)
a), Triangle plate (8), Folding plate (8a), (8a), Bottom plate (7), Bottom plate
(9) are bent in this order through the folds (c) toward the inside of the container, whereby the triangular plates (6),
According to (8), the bottom plate (7) and the bottom plate (9) are four side walls (1),
(2), (3), and (4) are folded flat at right angles.

Subsequently, a bottom plate (7) and both side folding plates (6a),
(8a) and the inside of the bottom plate (9)
(9) Insert the sealing plate (12) corresponding to the surface) (see FIG. 3 (b)), and place the overlapping sealing area (10) on the bottom plate (9) at the tip of the bottom plate (7). ). (Note that m in the figure indicates the overlapping seal width of the overlapped sealing area (10) and the insertion seal plate (12).) At this time, the insertion is made before or after the insertion of the tip of the bottom (9). The inner surfaces of each other, which are overlapped with each other, are heated and melted with hot air or the like, and then pressed and adhered from both sides of the inside of the rectangular barrel portion A and the outside of the bottom plate (7) and the bottom plate (9) to be adhered. C is formed in a hermetically sealed state.

After the bottom C is formed, the upper cover plate (15),
(17) A predetermined amount of liquid content or the like is filled from the opening side.

After filling the contents, as shown in FIG. 2 (solid line), an upper folding isosceles triangular plate having a vertex angle of 45 ° to 90 °.
(14), (16), the cover plate (15) and the cover plate (17) are bent inward through the folds (b), and the fold plates (14a), (14a) connected to them.
And (16a), (16a) (see Fig. 1) are folded inward at the same time,
Thereby, one of the adhesive inner plates (1
8), (18), and the other sticking inner plates (19), (19) which are also overlapped with each other, and a lid which is overlapped from the outside through the inner plates (18), (19). The plates (15), (17) and the outer plates (20), (21) attached to the palms attached to the upper side are superimposed on each other in a palm-spreading state, and the superposed inner resin is heated and melted with hot air or the like. Then, the superposed outer plates (20), (2
1) is pressed from the outside and is adhered in a hermetically sealed state, whereby the upper lid B is formed.

Here, the upper folding isosceles triangle plate (14),
Since the apex angle of (16) is not less than 45 ° and less than 90 °, as shown in FIG. 1, the cover plates (15) and (17) are folded at a predetermined angle with respect to the horizontal. The outer panels (20) and (21) are folded outward through the folds, and are superimposed and adhered to each other in a state of standing together perpendicularly to each other to form an upper lid B. Is done.

As described above, the sealed rectangular container made of paperboard of the present invention is manufactured by folding and assembling the paperboard blank shown in FIG. 1 and hermetically sealing it by applying heat and pressure.

As the container blank substrate mainly made of paperboard used in the container of the present invention, the innermost layer (the front side in the drawing of FIG. 1) has a low adsorption having a characteristic of hardly adsorbing gaseous molecules and fine particles. Polyethylene terephthalate resin, modified low-absorption polyethylene terephthalate resin mixed with plasticizer, etc., or low-absorption polyethylene terephthalate resin or modified low-absorption polyethylene terephthalate resin as the main component, and olefins such as polyethylene and polypropylene A mixed resin or a copolymer obtained by blending a synthetic resin such as a copolymer resin having good heat-fusibility and impact resistance is used.

As the resin having a low adsorption property, a polyethylene terephthalate resin, a polyethylene terephthalate resin modified by mixing a plasticizer (a plasticizer is mixed to such an extent that the low adsorption property is not lost), or a polyethylene terephthalate resin is used. There is a mixed resin or a copolymer as a main component. For example, an olefin-based copolymer resin such as polyethylene and polypropylene (for example, ethylene monomer and 100 parts by weight) is used for 100 parts by weight of a polyethylene terephthalate resin having terephthalic acid, isophthalic acid and ethylene glycol as monomers. 5) a copolymer of an unsaturated carboxylic acid derivative)
A resin mixed with ３０30 parts by weight is used. The blend ratio is appropriately set to such an extent that the mixed resin or the copolymer maintains low adsorption.

The outermost layer (back side of FIG. 1) of the blank substrate has a heat-sealing suitability and a resin having good impact-peeling resistance after fusion, for example, a polyolefin resin or A mixed resin mainly composed of a polyolefin-based resin or a resin made of a copolymer and having good impact sealability and good heat sealability is laminated.

As the outermost layer resin having the suitability for thermal fusion and the resistance to impact peeling after fusion, for example, a polyethylene resin or a polypropylene resin can be used, or a mixed resin mainly composed of a polyethylene resin or a polypropylene resin can be used. In the case where a resin or a copolymer is used, and in particular, a low adsorptivity is imparted to the outer resin layer (26), for example, a copolymer 1 with an unsaturated carboxylic acid derivative mainly composed of an ethylene monomer may be used.
A mixed resin mainly composed of a polyethylene resin obtained by mixing 5 to 30 parts by weight of a polyethylene terephthalate resin having terephthalic acid, isophthalic acid and ethylene glycol as monomers with respect to 00 parts by weight is used. The ratio of the blend is appropriately set to such an extent that the mixed resin or the copolymer retains the suitability for heat fusion.

In the intermediate layer between the innermost layer and the outermost layer of the blank substrate, paperboard (for example, ivory, basis weight 200 g) is used.
/ M ^{2 to} 400 g / m ² ) alone or a composite material of paperboard and a synthetic resin film (for example, polyethylene terephthalate resin or polyethylene resin, film thickness of 10 μm to 20 μm) can be used, and if necessary, Various laminated composite materials mainly composed of paperboard, such as a paperboard and an aluminum foil (thickness of 3 μm to 15 μm) or a composite of a paperboard, an aluminum foil and a synthetic resin film, can be used as the substrate.

[0037]

The sealed rectangular container made of paperboard according to the present invention has a container inner surface resin made of a low-absorbing resin such as a polyester resin which does not easily adsorb odor components on the innermost surface of the container, and a polyethylene resin on the outermost surface of the container. This is a container in which the resin on the outer surface of the container with heat-sealing strength is laminated, and the heat-sealed seal at the bottom can be heat-sealed by laminating the same resin to improve the impact resistance and seal-sealing performance at the bottom. Is what you can do.

[Brief description of the drawings]

FIG. 1 (a) is a plan view of a blank used in one embodiment of the container of the present invention. (B) A partial plan view of a blank used in another embodiment of the container of the present invention. (C) Partial plan view of a blank used in another embodiment of the container of the present invention.

FIG. 2 is an overall perspective view illustrating an embodiment of assembling the container of the present invention.

FIG. 3 (a) is a perspective view illustrating the assembly of the bottom of the container of the present invention. (B) It is a perspective view explaining assembly of the bottom part of this invention container.

FIG. 4 is a plan view illustrating an embodiment of a blank used for assembling a conventional container.

FIG. 5 (a) is a plan view illustrating assembly of a conventional container. (B) It is the whole perspective view explaining the assembly of the conventional container.

FIG. 6 (a) is a perspective view illustrating the assembly of the bottom of a conventional container. (B) It is a perspective view explaining the assembly of the bottom part of the conventional container.

[Explanation of symbols]

1,2,3,4… side wall plate 5… sticking plate 5 '… outside folding sticking plate 5 ”…
Inner fold attachment plate 6… Lower folding isosceles triangle plate 6a… Folding plate
7… Bottom plate 8… Lower folding isosceles triangle plate 8a… Folding plate 9
… Bottom plate 10… Stack area 11… Seal area 12
… Plug-in seal plate 13… Notch portion 14… Top folding isosceles triangle plate 14a… Folding plate
15 ... lid plate 16 ... upper folding isosceles triangle plate 16a ... folding plate
17… Cover plate 18… Folding inner plate 19… Folding inner plate 2
0,21… Attached outer skin a to k… Crease e… A fold A… Square barrel B… Top cover C… Bottom

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65D 5/40 B65D 5/08

Claims (1)

(57) [Claims] 1. A resin layer using a low-adsorption resin, a mixed resin mainly composed of a low-adsorption resin or a copolymer, is laminated on the innermost layer of the container, and a resin layer having good heat sealability is formed on the outermost layer of the container. Four side walls laminated and connected via the fold (a)
(1), (2), (3), (4) consisting of a square barrel portion A, side walls (1) on the upper side of the folding plates (14a), (14a) and the adhesive inner plate (18), ( 18), an upper isosceles triangular plate (14) provided with: a lid plate (15) having a palm-attached outer plate (20) on the upper side wall (2); and a folded plate on the upper side of the side wall (3).
(16a), an upper isosceles triangular plate (16) including an inner plate (19), (19) and a pasting inner plate (19), (19)
And a lid plate (17) provided with a lid (17) and a lid plate (17) connected to each other through a fold (b), and folding plates (6a) and (6a) below the side wall (1).
A lower folding isosceles triangular plate (8) including a bottom plate (7) below the side wall (2) and the folding plates (8a) and (8a) below the side wall (3). ), The bottom plate on the lower side of the side wall (4)
(9) in a sealed rectangular container made of paperboard having a bottom portion C connected to each other through a fold (c), wherein at least the bottom portion C has an overlapped sealing area (10) on the tip side of the bottom plate (7). And a seal plate (1) inserted into the bottom side of the bottom plate (9) through a fold (e)
2), the four side walls (1), (2), (3), (4) and the adhesive plate (5) are bent inward from the fold (a), and the adhesive plate (5) and , Side wall
(4), a bottom plate (9), a lid plate (17), and a gasket sticking outer plate (21), each of which is overlapped and stuck on the outer end to form a square barrel portion A, and the triangular plate (6 ), (8), and bottom plates (7), (9) are bent inward from fold (c) in order, and the folded plates (6a), (6a), (8a), (8a) are turned inward, respectively. The insertion seal plate (12) is attached to the inside of the fold of the bottom plate (7) and the fold plates (6a) and (8a) on both sides thereof outside from the fold (e), and the bottom plate ( 9) Insert tip, bottom plate
(7) A sealed rectangular container made of paperboard, characterized in that a bottom portion (C) is formed by thermocompression bonding an inner surface of the overlapped sealing region (10) and the insertion sealing plate (12).