EP0356829B1 - Biaxial-orientation blow-moulded bottle-shaped container - Google Patents
Biaxial-orientation blow-moulded bottle-shaped container Download PDFInfo
- Publication number
- EP0356829B1 EP0356829B1 EP19890115219 EP89115219A EP0356829B1 EP 0356829 B1 EP0356829 B1 EP 0356829B1 EP 19890115219 EP19890115219 EP 19890115219 EP 89115219 A EP89115219 A EP 89115219A EP 0356829 B1 EP0356829 B1 EP 0356829B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- recesses
- container
- bottle
- shaped container
- moulded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D23/00—Details of bottles or jars not otherwise provided for
- B65D23/10—Handles
- B65D23/102—Gripping means formed in the walls, e.g. roughening, cavities, projections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2501/00—Containers having bodies formed in one piece
- B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
- B65D2501/0018—Ribs
- B65D2501/0027—Hollow longitudinal ribs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2501/00—Containers having bodies formed in one piece
- B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
- B65D2501/0018—Ribs
- B65D2501/0036—Hollow circonferential ribs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2501/00—Containers having bodies formed in one piece
- B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
- B65D2501/0081—Bottles of non-circular cross-section
Definitions
- This invention relates to a blow-moulded bottle-shaped container of biaxially-oriented synthetic resin such as polyethylene terephthalate resin.
- bottle-shaped containers of relatively large size for containing liquids such as, for example, liquors or soy sauces have been widely utilized.
- the most effective means for moulding a bottle-shaped container of this type include means for moulding the bottle-shaped container by biaxially orientation blow-moulding a preformed parison moulded from a synthetic resin material.
- a blow-moulded bottle-shaped container of biaxially-oriented polyethylene terephthalate resin has a number of advantages such as a light weight, excellent mechanical strength and physical properties, an inexpensive cost together with the possibility of mass production.
- the blow-moulded bottle-shaped container of biaxially-oriented synthetic resin of this type has a round configuration as a whole with a smooth surface and is moulded in a relatively large size, the bottle-shaped container tends to feasibly slip when held by a hand and is accordingly inconvenient to be grasped by the hand, and must be associated with a grip separately moulded as a holding means of the container body.
- axially slender recesses have been manufactured at both sides of a cylindrical body of the bottle-shaped container so as to utilize the rear halves of the container body as a grip.
- the above-mentioned conventional bottle-shaped container is certainly convenient to handle but does not always have sufficient mechanical strength. More specifically, the conventional bottle-shaped container of this type exhibits serious drawback so that, when the conventional bottle-shaped container is dropped in the state that a predetermined quantity of liquid is filled in the container body to conduct a strength test, the slender recesses formed on the body of the bottle-shaped container are externally projected and deformed by the internal pressure of the liquid container in the container body by the dropping impact, resulting in no recovery of the deformation.
- this external projecting deformation of the recesses on the body of the conventional bottle-shaped container means insufficient buckling strength of the recesses formed on the container body, whereas the bottle-shaped container is desired to provide high mechanical strength.
- EP-A-0 033 745, FR-A-934 609 and US-A- 1 602 391 constitute improvements over the container described above with its axially slender recesses.
- EP-A-0 033 745, FR-A-934 609 and US-A- 1 602 391 constitute improvements over the container described above with its axially slender recesses.
- From this prior art it is known to provide a pair of inwardly depressed recesses in the cylindrical wall of the cylindrical body at opposite sides thereof with the minimum spacing between the recesses being at their deepest parts so that a portion of the cylindrical wall between the recesses forms a grip as a result of the recesses, but even this form of container does not have sufficient strength against buckling when the container is filled with liquid and dropped.
- the present invention seeks to overcome this drawback, and according to the invention this is achieved with a container having the characterising features of claim 1.
- Preferred features of the invention are set forth in sub-claims 2 - 4.
- the reinforcing rib or ribs thus provided on the container effectively disperse the internal pressure acting on the recesses.
- FIGs. 1 and 2 show an embodiment of a bottle-shaped container according to the invention.
- a bottle-shaped container 21 has a cylindrical container body 22 in which the lateral cross-sectional shape thereof is formed substantially in a rectangular shape, and a neck 23 integrally moulded through a shoulder at the top of the container body 22.
- Recesses 24 formed on opposite cylindrical surface portions of the container body 22 are respectively depressed inwardly toward a deepest body surface portion 25 at the centre thereof via inclined tapered walls 26 at the periphery thereof.
- a pair of the recesses 24 are formed as described above on the opposite cylindrical surface portions to thereby cause the rear parts of the container body 22 to become a grip 27 of an axial strip shape.
- a plurality of lateral grooves 29 are formed at a predetermined interval in parallel on the rear peripheral wall of the grip 27. The lateral grooves 29 thus formed provide mechanical strength of the grip 27, i.e., sufficient resistance strength against the grasping force of a hand acting on the grip 27 so as not to deform the grip 27.
- one or more reinforcing ribs 28 of projecting strip shape are respectively formed laterally in the recesses 24 to cross the recesses 24 in such a manner that the ribs 28 are projected from the peripheral walls 26 of the recesses 24.
- two reinforcing ribs 28 reinforce the recesses 24 having long elevational height.
- the number of the reinforcing ribs 28 in the recesses 24 may be selected depending upon the degree to be reinforced of the recesses 24.
- two reinforcing ribs 28 are spaced at such an interval that a finger of the hand can be inserted, thereby performing the anti-slip effect by the reinforcing ribs 28.
- the projecting state of the reinforcing rib 28 may be any of linear and externally swelling state and that both ends of the reinforcing ribs 28 may be disposed in the vicinity of the depression starting portion of the recesses 24 from the tapered wall 26 so as to increase the projecting height width as much as possible.
- the position of the projecting end must not be a value such that it projects from the plane shape of the cylindrical body surface of the entire container body 22, i.e., a value larger than the depth of the recesses 24.
- the projecting height width of the rib 28 may be preferably set to a value equal to or near the depressed depth width of the recesses 24.
- the reinforcing ribs 28 are moulded to cross the recesses 24 in a projecting strip shape in a relatively high projecting width. Therefore, sufficiently high mechanical strength can be provided in the recesses 24. Thus, even if internal or external pressure is acted on the recesses 24, the recesses 24 are not externally transferred, bent, projected nor deformed by the internal pressure, and the recesses 24 may not be further depressed nor deformed by the external pressure.
- the reinforcing ribs resist against the internal and external pressure acting on the recesses. Therefore, the recesses of the bottle-shaped container are not bent, projected nor deformed towards the outside or inside, and the machanical strength of the entire bottle-shaped container can be largely enhanced. Also, since the grip is integrally moulded with the container body, a relatively large-sized bottle-shaped container body can be readily handled.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Description
- This invention relates to a blow-moulded bottle-shaped container of biaxially-oriented synthetic resin such as polyethylene terephthalate resin.
- Recently, bottle-shaped containers of relatively large size for containing liquids such as, for example, liquors or soy sauces have been widely utilized.
- The most effective means for moulding a bottle-shaped container of this type include means for moulding the bottle-shaped container by biaxially orientation blow-moulding a preformed parison moulded from a synthetic resin material. Particularly, a blow-moulded bottle-shaped container of biaxially-oriented polyethylene terephthalate resin has a number of advantages such as a light weight, excellent mechanical strength and physical properties, an inexpensive cost together with the possibility of mass production.
- Since the blow-moulded bottle-shaped container of biaxially-oriented synthetic resin of this type has a round configuration as a whole with a smooth surface and is moulded in a relatively large size, the bottle-shaped container tends to feasibly slip when held by a hand and is accordingly inconvenient to be grasped by the hand, and must be associated with a grip separately moulded as a holding means of the container body.
- In order to obviate this difficulty of holding the conventional bottle-shaped container, axially slender recesses have been manufactured at both sides of a cylindrical body of the bottle-shaped container so as to utilize the rear halves of the container body as a grip.
- The above-mentioned conventional bottle-shaped container is certainly convenient to handle but does not always have sufficient mechanical strength. More specifically, the conventional bottle-shaped container of this type exhibits serious drawback so that, when the conventional bottle-shaped container is dropped in the state that a predetermined quantity of liquid is filled in the container body to conduct a strength test, the slender recesses formed on the body of the bottle-shaped container are externally projected and deformed by the internal pressure of the liquid container in the container body by the dropping impact, resulting in no recovery of the deformation.
- Further, this external projecting deformation of the recesses on the body of the conventional bottle-shaped container means insufficient buckling strength of the recesses formed on the container body, whereas the bottle-shaped container is desired to provide high mechanical strength.
- There are, however, other blow-moulded bottle-shaped containers of this general construction which are somewhat stronger as regards the tendency to buckle. For example, EP-A-0 033 745, FR-A-934 609 and US-A- 1 602 391 constitute improvements over the container described above with its axially slender recesses. From this prior art it is known to provide a pair of inwardly depressed recesses in the cylindrical wall of the cylindrical body at opposite sides thereof with the minimum spacing between the recesses being at their deepest parts so that a portion of the cylindrical wall between the recesses forms a grip as a result of the recesses, but even this form of container does not have sufficient strength against buckling when the container is filled with liquid and dropped.
- The present invention seeks to overcome this drawback, and according to the invention this is achieved with a container having the characterising features of claim 1. Preferred features of the invention are set forth in sub-claims 2 - 4.
- The reinforcing rib or ribs thus provided on the container effectively disperse the internal pressure acting on the recesses.
- The characteristic features of the invention will become more fully apparent and more readily understandable by the following description and the appended claims when read in conjunction with the accompanying drawings, in which :
- Fig. 1 is a side view of an embodiment of a blow-moulded bottle-shaped container according to the invention; and
- Fig. 2 is a sectional view taken along the line II-II in Fig. 1.
- Figs. 1 and 2 show an embodiment of a bottle-shaped container according to the invention. A bottle-
shaped container 21 has acylindrical container body 22 in which the lateral cross-sectional shape thereof is formed substantially in a rectangular shape, and aneck 23 integrally moulded through a shoulder at the top of thecontainer body 22. -
Recesses 24 formed on opposite cylindrical surface portions of thecontainer body 22 are respectively depressed inwardly toward a deepestbody surface portion 25 at the centre thereof via inclinedtapered walls 26 at the periphery thereof. - A pair of the
recesses 24 are formed as described above on the opposite cylindrical surface portions to thereby cause the rear parts of thecontainer body 22 to become agrip 27 of an axial strip shape. Further, a plurality oflateral grooves 29 are formed at a predetermined interval in parallel on the rear peripheral wall of thegrip 27. Thelateral grooves 29 thus formed provide mechanical strength of thegrip 27, i.e., sufficient resistance strength against the grasping force of a hand acting on thegrip 27 so as not to deform thegrip 27. - Further, one or more reinforcing
ribs 28 of projecting strip shape are respectively formed laterally in therecesses 24 to cross therecesses 24 in such a manner that theribs 28 are projected from theperipheral walls 26 of therecesses 24. - In the embodiment described above, two reinforcing
ribs 28 reinforce therecesses 24 having long elevational height. The number of the reinforcingribs 28 in therecesses 24 may be selected depending upon the degree to be reinforced of therecesses 24. In the particular embodiment shown, two reinforcingribs 28 are spaced at such an interval that a finger of the hand can be inserted, thereby performing the anti-slip effect by the reinforcingribs 28. - It is noted that the projecting state of the reinforcing
rib 28 may be any of linear and externally swelling state and that both ends of the reinforcingribs 28 may be disposed in the vicinity of the depression starting portion of therecesses 24 from thetapered wall 26 so as to increase the projecting height width as much as possible. However, even in case where theribs 28 are externally swelled, it is to be noted that the position of the projecting end must not be a value such that it projects from the plane shape of the cylindrical body surface of theentire container body 22, i.e., a value larger than the depth of therecesses 24. Ideally, the projecting height width of therib 28 may be preferably set to a value equal to or near the depressed depth width of therecesses 24. - According to the embodiment described above, the reinforcing
ribs 28 are moulded to cross therecesses 24 in a projecting strip shape in a relatively high projecting width. Therefore, sufficiently high mechanical strength can be provided in therecesses 24. Thus, even if internal or external pressure is acted on therecesses 24, therecesses 24 are not externally transferred, bent, projected nor deformed by the internal pressure, and therecesses 24 may not be further depressed nor deformed by the external pressure. - Therefore, even if the bottle-shaped container constructed as described above is dropped in the state that a content liquid is filled to rise the impact internal pressure in the container body or to effect a large internal pressure on the recesses, or even if a strong external pressure is acted on the recesses when the grip is grasped by hand in the state that the content liquid is so filled as to be heavy, the reinforcing ribs resist against the internal and external pressure acting on the recesses. Therefore, the recesses of the bottle-shaped container are not bent, projected nor deformed towards the outside or inside, and the machanical strength of the entire bottle-shaped container can be largely enhanced. Also, since the grip is integrally moulded with the container body, a relatively large-sized bottle-shaped container body can be readily handled.
Claims (4)
- A blow-moulded bottle-shaped container (21) of biaxially-oriented synthetic resin having an integrally-moulded neck (23) at the top of a multi-sided shaped body (22) of the container, there being a pair of inwardly-depressed recesses (24) in the wall of the container body (22) at opposite sides thereof with the minimum spacing between the recesses (24) being at their deepest parts (25) so that a portion of the wall between the recesses (24) forms a grip (27) as a result of the recesses, characterised in that at least one laterally-extending reinforcing rib (28) projects concavely in an arch-shape bent inwards to cross both tapered walls (26) of each of the recesses, the reinforcing rib or ribs having a length substantially equal to a lateral length of the recesses and a height less than the depth of the recesses.
- A container according to claim 1, characterised in that the reinforcing ribs (28) are aligned at such a predetermined interval that a finger of a human hand can enter the interval.
- A container according to claim 1, characterised in that a plurality of lateral grooves (29) are aligned across the grip (27) without extending into the recesses.
- A container according to claim 1, characterised in that the reinforcing ribs project convexly in an arch shape bent outwards to cross both tapered walls (26) of each of the recesses.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19890115219 EP0356829B1 (en) | 1985-04-17 | 1986-03-06 | Biaxial-orientation blow-moulded bottle-shaped container |
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1985057180U JPH0447053Y2 (en) | 1985-04-17 | 1985-04-17 | |
JP57180/85 | 1985-04-17 | ||
JP15209985U JPH0331691Y2 (en) | 1985-10-04 | 1985-10-04 | |
JP152100/85 | 1985-10-04 | ||
JP152099/85 | 1985-10-04 | ||
JP15210085U JPH0333612Y2 (en) | 1985-10-04 | 1985-10-04 | |
EP19890115219 EP0356829B1 (en) | 1985-04-17 | 1986-03-06 | Biaxial-orientation blow-moulded bottle-shaped container |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86301601.0 Division | 1986-03-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0356829A1 EP0356829A1 (en) | 1990-03-07 |
EP0356829B1 true EP0356829B1 (en) | 1993-11-24 |
Family
ID=27441717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890115219 Expired - Lifetime EP0356829B1 (en) | 1985-04-17 | 1986-03-06 | Biaxial-orientation blow-moulded bottle-shaped container |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0356829B1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6354346B2 (en) | 1999-10-21 | 2002-03-12 | 3M Innovative Properties Company | Gravity feed fluid dispensing valve |
US6367521B2 (en) | 1997-10-08 | 2002-04-09 | 3M Innovative Properties Company | Gravity feed fluid dispensing valve |
US6450214B1 (en) | 2001-08-31 | 2002-09-17 | 3M Innovative Properties Company | Gravity feed fluid dispensing valve |
US8205415B2 (en) | 2009-01-16 | 2012-06-26 | Kraft Foods Global Brands Llc | Method of packaging and shipping roast and ground coffee |
USD722885S1 (en) | 2012-06-22 | 2015-02-24 | Kraft Foods Group Brands Llc | Container |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5425404A (en) * | 1993-04-20 | 1995-06-20 | Minnesota Mining And Manufacturing Company | Gravity feed fluid dispensing system |
US5435451A (en) * | 1993-04-20 | 1995-07-25 | Minnesota Mining And Manufacturing Company | Bottle for containing a fluid |
FR2733962B1 (en) * | 1995-05-12 | 1997-08-01 | Solitaire Sa | BOTTLE, IN PARTICULAR FOR TOILET CLEANING LIQUID |
CA2368491C (en) | 2001-01-22 | 2008-03-18 | Ocean Spray Cranberries, Inc. | Container with integrated grip portions |
JP4389421B2 (en) * | 2001-09-28 | 2009-12-24 | 東洋製罐株式会社 | Handy bottle manufacturing method |
JP4046989B2 (en) | 2001-11-29 | 2008-02-13 | 株式会社吉野工業所 | Pinch grip type bottle type container |
EP1930246B1 (en) * | 2005-08-31 | 2012-06-13 | Yoshino Kogyosho Co., Ltd. | Synthetic resin rectangular bottle body |
AU2012202318B2 (en) * | 2005-08-31 | 2013-05-16 | Yoshino Kogyosho Co., Ltd. | Synthetic resin bottle |
US8419878B2 (en) | 2010-02-26 | 2013-04-16 | Neenah Paper, Inc. | Texturized mottled artificial clothing label and methods of making the same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1602391A (en) * | 1924-10-29 | 1926-10-12 | Physical Culture Products Corp | Container |
US2022520A (en) * | 1934-07-07 | 1935-11-26 | Parsons Ammonia Company Inc | Bottle |
BE476883A (en) * | 1946-10-02 | |||
FR1337902A (en) * | 1962-08-10 | 1963-09-20 | Clodrey Polyflex | Improvements made to the bottles, in particular to the plastic bottles |
DE2950269C2 (en) * | 1979-08-08 | 1985-10-31 | Yoshino Kogyosho Co., Ltd., Tokio/Tokyo | Thin-walled bottle made of saturated polyester resin |
-
1986
- 1986-03-06 EP EP19890115219 patent/EP0356829B1/en not_active Expired - Lifetime
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6367521B2 (en) | 1997-10-08 | 2002-04-09 | 3M Innovative Properties Company | Gravity feed fluid dispensing valve |
US6488058B1 (en) | 1997-10-08 | 2002-12-03 | 3M Innovative Properties Company | Gravity feed fluid dispensing valve |
US6354346B2 (en) | 1999-10-21 | 2002-03-12 | 3M Innovative Properties Company | Gravity feed fluid dispensing valve |
US6450214B1 (en) | 2001-08-31 | 2002-09-17 | 3M Innovative Properties Company | Gravity feed fluid dispensing valve |
US8205415B2 (en) | 2009-01-16 | 2012-06-26 | Kraft Foods Global Brands Llc | Method of packaging and shipping roast and ground coffee |
USD722885S1 (en) | 2012-06-22 | 2015-02-24 | Kraft Foods Group Brands Llc | Container |
Also Published As
Publication number | Publication date |
---|---|
EP0356829A1 (en) | 1990-03-07 |
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