JPH01199805A - Container sealing method - Google Patents

Abstract

PURPOSE:To improve the sealability of the opening portion of a container, by placing a sealing material having the shape matching with the opening edge of the container on the opening portion thereof and folding the same along the body portion thereof for bonding thereto. CONSTITUTION:One side of a sealing material 1 is coated with an adhesive material 5 in such manner as to provide a bonding area somewhat wider than the corresponding area of an edge 4 of an opening portion 3 of a carton 2. The sealing material 1 is then placed on the opening portion 3 of the carton 2 with the adhesive material coated portion matching with the opening edge 4. The sealing material 1 is thereafter folded along a square body 2a of the carton 2 and firmly attached thereto while pressing with a force from above, thereby sealing the opening portion 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for sealing a container, and more particularly, to a method for sealing a container that seals the opening of a container having an opening at at least one end of a cylindrical body. .

[Conventional technology]

Conventional techniques related to the method of sealing the opening of the container include, for example, Japanese Patent Publication No. 59-18244 and Japanese Patent Application Laid-open No. 5
There are the techniques described in Japanese Patent No. 6-151672 and other well-known techniques.

Japanese Patent Publication No. 59-18244 discloses that an adhesive is applied with an applicator roller to the upper edge fitting part of a box-shaped container body having an opening at the top; A method is shown in which the cap is delivered and the opening of a container formed by fitting the cap to the upper edge fitting portion is sealed.

Further, in Japanese Patent Application Laid-Open No. 56-151672, there is a step on the upper side of the curled portion of the lip of a paper cup.

In the case of a container, apply heat-welding type hot-melt adhesive to an appropriate width and thickness thicker than the level difference on the upper surface of the upper surface of the curled mouth part, and then directly adhere it to the desired position on the back of the top plate. Cover the lid body coated with the agent, and then heat and press the position corresponding to the curled mouth edge of the paper tip to remove the top of the lid body.
A method for sealing a container (Gi-ko-tip) is shown in which the 1-meter surface is adhered to the upper surface of the curled edge of the paper tip.

Furthermore, the collection of well-known and commonly used techniques in the Patent Office Gazette states that the above-mentioned opening of a cylindrical container having an opening at the top may be covered with a lid body coated with a heat-sealable adhesive on the entire surface, or a resin laminate on the back surface. A method of sealing a container is disclosed, in which the container is covered with a sealing member having the entire surface coated with a sealant, and then the outside of the lid or sealing member is pressurized and heated to seal the opening.

(Problem to be Solved by the Invention) However, the container sealing method disclosed in Japanese Patent Publication No. 59-18244 involves applying an adhesive to the upper edge fitting portion of the container body using a coating roller. Since this is done by fitting a cap to the upper edge fitting part coated with the above adhesive, when using this sealing method, the above-mentioned adhesive can only be applied to the upper edge fitting part, and the above-mentioned opening by the cap In addition, due to variations in the height of the container body and the unevenness of the upper edge fitting part that tends to occur when forming the container body, it is difficult to apply the adhesive evenly. There is a drawback that the cap cannot be reliably sealed.

Furthermore, the container sealing method disclosed in JP-A-56-151672 reliably seals the paper tips without being affected by variations in height or differences in height of the paper tips. However, if the container is a carton with a rectangular cylindrical body, it is impossible to form a curl at the opening edge, so adhesive cannot be applied to the step and the opening of the carton cannot be sealed.

Furthermore, the well-known and commonly used techniques described above simply apply adhesive or resin to the entire surface of the back of the lid or seal and then cover the opening of the container. This has the disadvantage of being uneconomical, and if there is a step in the opening, there is a risk that the sealing performance of the opening will be insufficient.

Incidentally, in the above-mentioned conventional technology, there is no description or suggestion about bending the sealing material in the direction along the rectangular cylindrical body of the carton.

Therefore, an object of the present invention is to be able to reliably adhere a sealing material to an opening without being affected by variations in the height of the container or a step that may be formed at the opening, It is an object of the present invention to provide a method for sealing a container, which can improve the sealing performance of the container and can economically use an adhesive.

[Means to solve the problem]

The present invention provides a container sealing method for sealing an opening of a container having an opening provided at at least one end of a rectangular cylindrical body, in which an adhesive is applied in a shape corresponding to the shape of an opening edge of the opening. To provide a method for sealing a container, comprising: covering the opening with a sealing material coated with the above-mentioned sealing material, and then bending the sealing material in a direction along the rectangular cylindrical body and adhering it to the opening edge of the container. This achieved the above objectives.

〔Example〕

Hereinafter, embodiments of the container sealing method of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing the manner in which adhesive is applied to the sealing material;
Figure 2 is a sectional view showing how the sealing material is placed on the container;
The figure is a sectional view showing a mode in which the sealing material is pressed from the outside and adhered to the opening edge of the container.

In order to seal the opening of a container (carton) using the container sealing method of the present invention, first, as shown in FIG. The adhesive material 5 is applied to a slightly wider shape in a shape corresponding to the shape of the opening edge 4 of the opening 3 of No. 2 (in the figure, the opening edge 4).

Next, as shown in FIG. 2, the sealing material 1 coated with the adhesive 5 as described above is placed in the opening of the carton 2 with the part coated with the adhesive 5 corresponding to the opening edge 4. Cover with 3.

Thereafter, as shown in FIG. 3, the sealing material 1 is bent in the direction along the rectangular cylindrical body 2a of the carton 2, and the sealing material 1 is bent by pressing force from the top of the sealing material 1 (for example, from the direction of arrow P). The sealing material 1 is surely adhered to the opening edge 4 of the carton 2, and the opening 3 of the carton 2 is sealed.

Also, to explain the materials etc. of each part, the carton 2 is made of N-
PE or NSK (paperboard mixed with moisture-proofing agent) with a moisture permeability of 30 g/rd.
・Can be formed in about 24 hours, in this case, tsubo i5
As N-PE of about 80 g/m, tsubo N320g/
rd coated pole, 20μ thick LDPE and basis weight 2
N-PE with a basis weight of about 680 g/nl includes coated ball with a basis weight of 380 g/nl, LDPE with a thickness of 20μ, and jute liner with a basis weight of 1280 g/nl. Examples include those consisting of.

In addition, the sealing material 1 is, for example, ■Al foil/glassine paper, ■pure white roll 10PP/glassine paper, ■glassine paper/HD.
PE/Glassine paper, ■Graphine paper/A l t1
It can be formed from a laminated material such as 5/glassine paper and 2 glassine 10PP/glassine paper. More specifically, for example, ■ Al foil with a thickness of 7 μ / glassine paper with a basis weight of 26.5 g / ■ pure white roll of 5135 g / OPP / 25.8 g with a thickness of 20 μ /Bo's glassine paper, ゛ ■1 tsubo
25.8g/po glassine/25μ thick HDPE/
tsubo 225.8g/bo glassine paper, ■ tsubo weight 25.8g/
Bo's Glassine Gi / 7μ thick Al foil / Tsubo 125.8g /
Bo's glassine paper, ■Basic weight 25.8g/Bo's glassine Gi/
It can be formed using a laminated material of OPP with a thickness of 20μ/glassine paper with a basis weight of 25.8g/rrr, but preferably the above-mentioned 25.8g/rrr tsubo 125.8g/rrr. Glassine Gi/thickness 2
0B(7) OPP/Made of a laminated material of glassine paper with a basis weight of 25.8 g/ITr.

In addition, the adhesive 5 is: ■Polysol (an emulsion type adhesive whose main components are vinyl acetate, poval, and plasticizer) manufactured by Showa Kobunshi Co., Ltd. ■Movinyl (trade name: vinyl acetate, plasticizer) manufactured by Hoechst Gosei Co., Ltd. (emulsion type adhesive whose main component is dibutyl phthalate) etc. can be used.

Next, an embodiment of the container sealing method of the present invention will be described along with a part of an example of packaging used for the implementation.

Fig. 4 is a side view showing a sealant covering device that covers the opening of a carton with a sealant cut to a predetermined size and coated with adhesive, and Fig. 5 is a side view showing a sealant covering device that is part of the sealant covering device described above. FIG. 6 is a side view showing the device; FIG. 6 is a perspective view showing a roller for applying adhesive; FIGS. The figure is a perspective view showing a state in which the sealing material (indicated by a two-dot chain line in the figure) is placed over the opening of the carton, and FIG. 9 is a side view showing a pressing device that presses the sealing material placed over the opening of the carton. , Fig. 10 is a cross-sectional view showing the pressing device pressing the sealing material placed over the opening of the carton, and Fig. 11 is a lid covering in which the opening of the carton is sealed with the sealing material and a lid is placed on the outside. FIG. 12 is a side view showing the apparatus, and a partially cutaway perspective view showing a state in which the opening of the carton is sealed with a sealing material and a meng is placed on the outside.

First, the sealing material covering device 30 shown in FIGS. 4 to 6 will be explained. This sealing material covering device 30 covers the carton 2.
A pasting roller 31 is provided near the top of the carton conveying device 20 that conveys the sealing material 1 and is capable of holding the sealing material 1 in a vacuum, and from this pasting roller 31 the carton 2 is
A round belt 33 has return rollers 32 provided at predetermined intervals in the conveyance direction (direction of arrow R), and is installed between both grooves (not shown) formed in both rollers 31 and 32, respectively. The circumferential speed of both rollers 31 and 32 and the rotational speed of the round belt 33 are synchronized with the transport speed of the carton 2 by the carton transport device 20.

The sealing material covering device 30 also includes a sealing material roll setting station 34 in which the sealing material 1 is set in a rolled state, and a sealing material roll setting station 34 in which the sealing material 1 is set in a rolled state; and a sealing material feed roller 35 that feeds the sealing material 1 toward the pasting roller 31, and the sealing material 1 is provided near the pasting roller 31 and fed out by the sealing material feed roller 35.
A cutter roller 37 is provided with a blade (not shown) for cutting the sealing material 1 into a predetermined size, and has an air blowing hole 36 for blowing out the cut sealing material 1 toward the pasting roller 31. 31
An adhesive application device 38 is provided near the outer periphery of the sealing material 1 and is adapted to apply the adhesive 5 to the cut sealing material 1 that has been moved while being held under vacuum by the application roller 31. As shown in FIG. 5, this adhesive application device 38 has a first application roller 39 and a second application roller 40, each of which is rotatably provided so as to be in contact with the outer periphery of the application roller 31, and Both of these rollers 39 and 40 and the pasting roller 31
combs 41, 42 respectively provided between the rollers 39, 40, and an adhesive roller 43 which is provided in rolling contact with both rollers 39, 40 and transfers the adhesive 5 to these rollers 39, 40. However, it further includes an adhesive tank 44 for supplying the adhesive 5 to the adhesive roller 43.

Since the sealer covering device 30 is configured as described above, the cartons 2 continuously supplied from the previous process are separated into one piece by a separating device (not shown) disposed in front of the device 30. A conveying device 2 that is spaced apart at regular intervals and arranged following the above-mentioned chick cutting device.
0 to the sealing material covering device 30, and when detected at a predetermined position during conveyance, the sealing material feed roller 35 is activated, and the sealing material 1 set on the sealing material original roll set station run 34 is At the same time, the cutter roller 37 for cutting operates, and the sealing material 1 is cut into a predetermined size. The sealing material 1 cut to a predetermined size is prevented from being wrapped around the cutter roller 37 due to static electricity or other adverse effects by air blowing from the air blowing hole 36, and is completely transferred to the pasting drum 31.

In addition, the width of the above seal 1 is approximately 2 from the width of carton 2 + p
The length of the sealing material 1 after cutting is also approximately 20ff longer than the vertical width of the carton 2.
It is set so that lI11 becomes longer. Further, the carton 2 is transported by the transport device 20 while being regulated by guides 21a, 21b in the left and right directions in the direction of travel, and by attachments 23a, 23b in the front and rear directions in the direction of travel.

The sealing material 1 transferred to the pasting drum 31 is vacuum-held on the outer periphery of the pasting drum 31, and while it is traveling, the adhesive applicator 38 applies a shape corresponding to the opening edge 4 of the carton 2, that is, a mouth opening. Adhesive 5 is applied to the letter shape. That is, as shown in FIG. 7(a), the adhesive 5 is applied by the first application roller 39 to a portion other than the portion corresponding to the comb 41 for sealing and prevention of entrainment to the first application roller 39, Next, as shown in FIG. 7(b), the second application roller 40 applies the adhesive 5 only to the unapplied portions of the first application roller 39, and as a result, as shown in FIG.
), the adhesive 5 is applied in a square shape.

The sealing material 1 coated with the adhesive 5 is kept under vacuum up to the lowest point 31' of the application drum 31, ie, the point where it comes into contact with the carton 2, but thereafter the vacuum state is released. Then, the transfer of the sealing material 1 to the opening edge 4 of the carton 2 starts from the lowest point 31'. Since the circumferential speed of the pasting drum 31 and the round belt 33 are set to the same speed as the conveyance speed of the carton 2, the sealing material 1 whose transfer has started is reliably separated from the pasting drum 31 by the round belt 33. It is then lightly pressed down to the round belt return roller 32 and transferred to the carton 2 (see FIG. 8).

Next, the pressing device 50 shown in FIG. 9 will be explained.
This device 50 has a conveying chain 51 which is arranged at a position adjacent to the sealing material covering device 30 in the conveying direction of the carton 2 and is rotatably driven in synchronization with the conveying speed of the carton 2, Moreover, this conveying chain 51 has a plurality of sponge-equipped caterpillar belt devices 52 provided at the same interval as the conveyance interval of the cartons 2, and each of these sponge-equipped caterpillar belt devices 52 is provided with a plurality of pressing sponges 53. It has the following.

Since the pressing device 50 is configured as described above, as shown in FIGS. 9 and 10, the sealing material 1 transferred to the carton 2 as described above can be moved at the conveyance speed of the carton 2. The sponge-equipped caterpillar belt device 5 is positioned above the cartons 2 that are conveyed in a synchronized manner.
2 is pressed against the opening edge 4 of the carton 2, and at the same time, using the shape and elasticity of the sponge 53, the portion 1a of the sealing material 1 outside the opening edge 4 of the carton 2 is pressed against the opening edge 4 of the carton 2. As a result, the opening edge 4 of the carton 2 can be securely sealed.

Further, to explain the lid covering device 70 shown in FIG. 11, this device 70 is installed at a position adjacent to the pressing device 50 in the conveying direction of the carton 2 and is inclined so that the outlet side is lower. A chute 71 for supplying Iljα 6 and a pressure roller device 72 disposed adjacent to the chute 71 in the traveling direction of the carton 2.

Since the lid covering device 70 is configured as described above, when the cartons 2 sealed with the sealing material 1 are detected by a detector (not shown), they are fed one by one from the chute 71. The lid 6, which is waiting at the chute outlet ILa, is hooked onto the front side of the advancing carton 2 to cover it, and finally the entire top surface of the carton 2 is pressed by the pressure roller device 72, as shown in FIG. As shown, M6 is covered.

The embodiments of the container sealing method of the present invention have been described above along with some examples of the apparatus used for carrying out the method, but the container sealing method of the present invention is not limited to the above embodiments (for example, The shape of the opening edge of the carton may be polygonal or other shape other than square, in which case the shape of the sealing material and the shape of the adhesive application shall be adapted to the shape of the opening edge of the carton. Good.

(Effects of the Invention) The container sealing method of the present invention includes covering the opening with a sealing material coated with adhesive in a shape corresponding to the shape of the opening edge of the opening of the container, and then covering the opening with the sealing material as described above. By bending it in the direction along the rectangular cylindrical body and adhering it to the opening edge of the container, it is possible to seal the opening of the container. It is possible to reliably adhere the sealing material to the opening without being affected by the stepped part that may sometimes occur, and it is possible to improve the sealing performance of the opening of the container, and it is possible to use adhesive economically. It has the effect of being able to.

[Brief explanation of the drawing]

Figure 1 is a plan view showing Mr. B applying adhesive to the sealing material;
Figure 2 is a sectional view showing how the sealing material is placed on the container;
The figure is a cross-sectional view showing how the sealing material is pressed from the outside and adhered to the opening edge of the container. Figure 4 is a cross-sectional view showing how the sealing material is adhered to the opening edge of the container by pressing it from the outside. FIG. FIG. 5 is a side view showing an adhesive coating device forming a part of the sealing material covering device; FIG. 6 is a perspective view showing a roller for applying adhesive;
Figure 7 is a schematic diagram showing the order in which adhesive is applied to the sealing material;
Figure 8 is a perspective view showing the opening of the carton covered with the sealing material (indicated by a two-dot chain line in the figure), and Figure 9 shows a pressing device that presses the sealing material placed over the opening of the carton. A side view, FIG. 10 is a cross-sectional view showing the pressing device pressing the sealing material placed over the opening of the carton, and FIG. 11 is a sectional view showing the opening of the carton being sealed with the sealing material and a lid being placed on the outside. M
FIG. 12 is a side view showing the covering device, and a partially cutaway perspective view showing a state in which the opening of the carton is sealed with a sealing material and a lid is placed on the outside. 1... Sealing material 2... Container (carton) 2a... Square tubular body 3... Opening 4... Opening edge 5... Adhesive patent applicant Kao Co., Ltd. No. Figure 9 Figure 10 Figure 11 Figure 12 Procedural amendment February 24, 1988 Director General of the Patent Office Kunio Ogawa 1 tffiyu 1, Indication of the case Patent application No. 14044/1983 2, Name of the invention Seal of container Method 3: Relationship with the case of the person making the amendment Patent applicant (091) Kao Co., Ltd. 4゜ Agent 601 Pacific Nogizaka, 6-29 Akasaka 9-chome, Minato-ku, Tokyo Voluntary amendment (1 year and 3 years after application) 6. Detailed description of the invention in the specification to be amended. 7. Contents of correction

Claims (1)

[Claims] (1) In a container sealing method for sealing the opening of a container having an opening provided at at least one end of a square cylindrical body, an adhesive is applied in a shape corresponding to the shape of the opening edge of the opening. A method for sealing a container, comprising placing the applied sealing material over the opening, and then bending the sealing material in a direction along the rectangular cylindrical body and adhering it to the opening edge of the container.