WO2000064771A1 - Thin-walled container and lid, and also a method for making - Google Patents
Thin-walled container and lid, and also a method for making Download PDFInfo
- Publication number
- WO2000064771A1 WO2000064771A1 PCT/SE2000/000404 SE0000404W WO0064771A1 WO 2000064771 A1 WO2000064771 A1 WO 2000064771A1 SE 0000404 W SE0000404 W SE 0000404W WO 0064771 A1 WO0064771 A1 WO 0064771A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lid
- container
- thermoformed
- wall section
- section
- Prior art date
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Classifications
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- 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
- B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
- B65D1/26—Thin-walled containers, e.g. formed by deep-drawing operations
-
- 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
- B65D43/00—Lids or covers for rigid or semi-rigid containers
- B65D43/02—Removable lids or covers
- B65D43/0202—Removable lids or covers without integral tamper element
- B65D43/0225—Removable lids or covers without integral tamper element secured by rotation
- B65D43/0229—Removable lids or covers without integral tamper element secured by rotation only on the inside, or a part turned to the inside, of the mouth of the container
-
- 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
- B65D43/00—Lids or covers for rigid or semi-rigid containers
- B65D43/02—Removable lids or covers
- B65D43/0202—Removable lids or covers without integral tamper element
- B65D43/0225—Removable lids or covers without integral tamper element secured by rotation
- B65D43/0231—Removable lids or covers without integral tamper element secured by rotation only on the outside, or a part turned to the outside, of the mouth of the container
-
- 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
- B65D43/00—Lids or covers for rigid or semi-rigid containers
- B65D43/02—Removable lids or covers
- B65D43/0235—Removable lids or covers with integral tamper element
- B65D43/0277—Removable lids or covers with integral tamper element secured by rotation before removal of the tamper element
- B65D43/0281—Removable lids or covers with integral tamper element secured by rotation before removal of the tamper element only on the inside, or a part turned to the inside, of the mouth of the container
-
- 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
- B65D43/00—Lids or covers for rigid or semi-rigid containers
- B65D43/02—Removable lids or covers
- B65D43/0235—Removable lids or covers with integral tamper element
- B65D43/0277—Removable lids or covers with integral tamper element secured by rotation before removal of the tamper element
- B65D43/0283—Removable lids or covers with integral tamper element secured by rotation before removal of the tamper element only on the outside, or a part turned to the outside, of the mouth of the container
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00018—Overall construction of the lid
- B65D2543/00064—Shape of the outer periphery
- B65D2543/00074—Shape of the outer periphery curved
- B65D2543/00092—Shape of the outer periphery curved circular
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00018—Overall construction of the lid
- B65D2543/00259—Materials used
- B65D2543/00296—Plastic
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00425—Lids or covers welded or adhered to the container
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
- B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
- B65D2543/00509—Cup
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
- B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
- B65D2543/00527—NO contact
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
- B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
- B65D2543/00555—Contact between the container and the lid on the inside or the outside of the container on both the inside and the outside
-
- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00953—Sealing means
- B65D2543/0099—Integral supplemental sealing lips
Definitions
- the present invention relates to a container and a lid of thin- walled plastic, which are provided with screw threads.
- the invention also relates to a method of being able to produce such a container and such a lid cheaply.
- Plastic is often a preferred material in connection with packagings, above all thanks to plastic's good barrier properties, i.e. the fact that it is impermeable.
- Liquid-tight plastic packagings of this kind are however relatively expensive if they are provided with threads. It is not possible to manufacture threaded plastic containers cheaply using the prior art. The reason for this is that according to the prior art, injection moulding is used to manufacture such containers. The tools for injection moulding are expensive and complicated to produce, since spark machining is necessary. As a consequence of this, it is attempted to avoid too much machining, which means that the material thickness is often permitted to be greater than the strength actually demands.
- Plastic packagings for salads of various types are a typical example in which such a compromise is often made.
- a plastic container with threads is not used here, but a plastic container closed by a lid with a snap-in fastener.
- the container and lid are manufactured from thin- walled plastic by means of thermo- forming, for example by means of vacuum technology.
- Containers of this kind occur very frequently thanks to their low price, which is a consequence of the fact that the tools for thermoforming are very cheap, as they can be manufactured by means of conventional, cheap machining methods, for example cutting.
- the starting material for the container is cheap and the material consumption low.
- the material thickness of the starting material is always less in principle than 0.9 mm and more often than not is as thin as approx. 0.3-0.4 mm.
- the disadvantage of such containers is that the sealing capacity, between a snap-in lid and the container, is not always reliable. Thus there is a risk of such containers leaking, above all when they are exposed to stress or when they are inclined or turned over, which is naturally a major disadvantage.
- US 5,628,417 shows a plastic container with a plastic lid, with a threaded closure, which is manufactured according to a conventional forming method, with separable mould parts. Both the container and lid will therefore be relatively thick- walled and will have edges/burrs which obstruct sealing in the areas of the joints between the mould parts.
- a threaded cap for a bottle is known from 4,099,903, which cap is manufactured by moulding of a plastic film on a tool. Following moulding, the tool is rotated so that the cap can be released from it.
- the shape of the cap is specially adapted for bottles, which bottles are manufactured according to other, known methods.
- the aim of the present invention is to eliminate or at least minimize the above problems, which is achieved by means of a container of thin- walled plastic, comprising a container part, with a bottom section and a wall section together with a closure part, the closure part comprising threads.
- an impermeable container with hermetically closing lid can be manufactured at very low cost in relation to existing plastic containers.
- they can be manufactured in a recyclable material and are easy to compress following use, which are further advantages.
- the material thickness is between 0.1 and 2.0 mm, and the material thickness of the threads is essentially the same as the material thickness of the container,
- the closure part comprises a sealing face, which is devoid of discontinuities.
- a major advantage of a container according to the invention is that, thanks to the method of manufacture, the sealing face is completely smooth, in contrast to containers which are produced by means of other methods, for example mould blowing, die casting, in which a discontinuity is always formed in the parting line between the mould parts. Thanks to the invention, a smooth sealing face is thus ensured without edges/burrs.
- sealing face is arranged rotationally symmetrically around an axis of symmetry
- each sectional face through the collar parallel to the line of symmetry preferably comprises at least one thread ridge
- the free end of the collar has the largest diametrical dimension of the container
- said collar forms a section directed downwards, the uppermost face of the container consisting of material which lies between the collar section and the container part,
- the sealing face in one embodiment, consists of the uppermost face of the container
- the collar part is threaded externally to receive a lid, and it encloses the sealing face, together with preferably an upper part of the wall section, a stiffening closure part being formed,
- said collar in one embodiment, is threaded internally to receive a lid, and the collar forms a section directed upwards, so that it constitutes an extension of the container,
- the sealing face is, in one embodiment, arranged on a sealing ridge, preferably between said wall section and an upper wall section, the wall section preferably passing in the main directly into the sealing ridge.
- the invention also relates to a lid of thin- walled plastic, comprising a closure part and a lid part with an underside and an upper side, the closure part comprising threads.
- a lid according to the invention is that: - the material thickness is between 0.1 and 2.0 mm, and the material thickness of the threads is essentially the same as the material thickness of the lid part,
- the closure part comprises a sealing face arranged in a transition zone between the lid part and the closure part
- the sealing face is arranged rotationally symmetrically around an axis of symmetry
- said sealing face consists of an annular section, which projects below the underside of the lid part, at least in the area adjacent to said annular section, so that a transition zone is formed, which produces stiffening
- the closure part comprises a wall section, which extends essentially vertically and the lower end of which passes in the main directly into said annular section
- said wall section extends a substantial distance between said annular section and the upper part of the lid, - the threads are arranged in a collar which extends downwards from said upper part, and which at a distance encloses said wall section,
- the sealing face consists, in one embodiment, of an annular section, which projects outside, and preferably above, the underside of the lid part.
- the invention also relates to a container of thin- walled plastic, comprising a container part, with a bottom section and a wall section, together with a closure part, the closure part comprising threads, with a lid of thin- walled plastic, comprising a closure part and a lid part with an underside and an upper side, the closure part comprising threads which correspond to the threads in the closure part of the container.
- the lid and container each have a lug, which is intended for welding together
- a perforation line is provided to be able to tear off said lugs
- the wall section of the lid has a smaller outward inclination relative to the vertical plane than a corresponding wall section of the container
- the wall section of the lid in another embodiment, has the same outward inclination relative to the vertical plane as a corresponding wall section of the container,
- the wall section of the lid has a longer vertical extension than a corresponding wall section of the container, due to which the lid can be screwed onto the container so that said annular section of the lid is pressed together with the sealing face of the container.
- the invention also relates to a method of manufacture of the container and/or lid according to the above, thermofo ⁇ ning being used, a thin- walled plastic material being used as the starting material.
- the ready-formed pieces are first punched and then rotated out of the forming tool, either by:
- Fig. 1 shows a container according to a preferred embodiment of the invention
- Fig. 2 shows a lid according to a preferred embodiment of the invention
- Fig. 3 shows the container in Fig. 1 with the lid in Fig. 2
- Fig. 4 shows an alternative lid for the container in Fig. 1
- Fig. 5 shows a container with a lid according to a second embodiment of the invention
- Fig. 6 shows a container with a lid according to a third embodiment of the invention
- Fig. 7 shows a container with a lid according to a fourth embodiment of the invention
- Fig. 8 shows a container with a lid according to a fifth embodiment of the invention
- Fig. 9 shows a container with a lid according to a sixth embodiment of the invention
- Fig. 10 shows a container with a lid according to a seventh embodiment of the invention
- Fig. 11 shows an alternative execution, which is specially intended for large pots, a container with a lid being shown in principle from the side
- Fig. 12 shows a container with lid according to Fig. 11 seen from above
- Fig. 13 shows an alternative execution, in principle according to Fig. 11, but also intended for smaller pots.
- Fig. 1 shows a thin- walled container with a container part 1, an essentially level bottom section 2 which passes via a corner area into a wall section 4, together with a closure part 3.
- the material for the container is synthetic, preferably a polymer material, and even more preferredly a preferably recyclable plastic material, e.g. polystyrene, polypropylene, polyethylene, polyethylene terephthalate, or polyvinyl chloride.
- the criteria for the choice of material are that the material shall be suitable for thermo- forming under pressure or vacuum, and that it shall be approved for use in packagings for food, medicines etc., at least in cases where such application areas are current.
- the container is thin-walled, with a material thickness (t).
- the closure part 3 comprises threads 5.
- the threads 5 are arranged in a collar 10 in the upper section of the container.
- the collar here forms a section directed downwards which, at a distance, encloses the upper part of the container part 1, due to which the closure part 3 forms a stiffening section for the container.
- Between the collar 10 and the container part 1 is the uppermost face 12 of the container, which face can be level and mainly horizontal, or can form an acute angle between the collar 10 and the container part 1.
- the threads 5 are hollow, since the container is manufactured by me ⁇ noforming, which means that the hollow reverse sides of the threads are visible on the inside/reverse of the collar.
- the threads 5 are also deformable to a certain extent, which can be positive for the fit and sealing between the container and lid.
- the threads 5 are arranged such that each imaginary sectional face through the collar 10 and parallel to a line of symmetry 9 usually comprises at least one thread ridge 5A. However, in certain cases the threads can be distributed in such a way that certain cross-sections do not pass through any thread ridge. Between the thread ridges 5 A the collar 10 has a smaller diameter 5B. The free end 13 of the collar has the greatest diameter of the container.
- the container is, except for on the threads 5, rotationally symmetrical (which is not however necessary) around the axis of symmetry 9.
- the closure part 3 also has an annular sealing face 7, which is continuously smooth or devoid of discontinuities.
- the sealing face 7 is arranged rotationally symmetrically around the axis of symmetry 9 and has a normal which is essentially parallel to the axis of symmetry.
- the sealing face 7 is also disposed between the wall section 4 of the container part 1 and an upper wall section 14, which upper wall section 14 has a greater diameter than the wall section 4.
- Fig. 2 shows the lid 20 for the container in Fig. 1.
- the material in the lid is preferably the same as in the related container.
- the lid 20 comprises a closure part 22, which is provided in a collar-like section with internal threads 26, corresponding to the threads 5 in Fig. 1 , and an essentially level lid part 24 with an underside 24A and an upper side 24B.
- the closure part 22 also comprises an annular section/a sealing face 28 which is continuously smooth or devoid of discontinuities and is arranged in a transition zone 30 between the lid part 24 and the closure part 22.
- Both the lid part 24 and the sealing face 28 are disposed rotationally symmetrically around an axis of symmetry 9.
- the sealing face 28 consists of an annular section which projects, i.e. forms a sealing ridge, below the underside 24A of the lid part. This construction provides rigidity at the same time as it leads to effective sealing between the sealing face 28 of the lid and the corresponding sealing face 7 of the container.
- the closure part 22 also comprises an essentially vertical wall section 32, which is arranged rotationally symmetrically around the axis of symmetry 9 and arranged concentrically inside the outer, collar-like, threaded part of the closure part, with the lid's uppermost part 34 in between.
- the wall section 32 passes advantageously directly into the annular section/sealing face 28, i.e. so that the lower part of the wall section will form one side wall in the sealing ridge. It is also advantageous here that the wall section 32 is mainly smooth, i.e. without deformation notches, a closing force being able to be led directly down into the sealing face 28, when a container is closed with the lid 20.
- Fig. 3 shows the container according to Fig. 1 with the lid according to Fig. 2, with a couple of aspects which are important for sealing to be emphasized.
- the wall section 32 of the lid has a radius smaller than that produced by the corresponding, upper wall section 14 of the container on the corresponding vertical distance. This means that, when the lid is applied to the container, a gap 40 is formed between the wall sections 32 and 14, which facilitates fitting of the lid 20 on the container 1.
- Complete sealing is achieved by means of the sealing faces 7 and 28, when the lid 22 presses these against one another by means of its threads 26 interacting with the threads 5 of the container 1.
- the wall section 32 of the lid has a longer vertical extension than the corresponding upper wall section 14 of the container, due to which the lid can be screwed so far down onto the container that the sealing face 28 of the lid is pressed together with the sealing face 7 of the container, without any risk that the upper edge 12 of the container shall come into contact with the corresponding part 34 of the lid 20.
- Fig. 4 shows an alternative lid 20 for the container in Fig. 1, which lid is formed so that the annular section 28, i.e. the sealing face 28 of the lid, projects below the underside
- Fig. 5 shows a second embodiment of the lid and container, in which the annular section/sealing face 7 of the container 1 has a sealing ridge, the inner side wall of which passes directly into the wall section 4 of the container part.
- the lid 20 on the other hand has a level sealing face 28 with a normal which is disposed parallel in the main to the axis of symmetry 9. It is naturally also conceivable that both the container and the lid have sealing ridges arranged against one another. This figure also illustrates that it is possible to arrange the lid and container without any gap between their adjacent, essentially vertical wall sections 14, 32.
- Fig. 6 shows a third embodiment of the lid and container, in which the container is formed with a wall section 4 which passes into a bottom section 2, which bottom section is essentially rounded, i.e. the container lacks an essentially level bottom section.
- the embodiment is intended thereby to illustrate that the overall shape of the container is not of importance to the invention. It is also evident from Fig. 6 that complete sealing between the lid and container can be obtained when the wall section 32 of the lid has a smaller outward inclination relative to the axis of symmetry 9 than that produced by the container's corresponding wall section 14A on the corresponding vertical distance.
- Fig. 7 shows a fourth embodiment of the lid and container, in which the collar 10 of the container forms a section directed upwards, so that it constitutes an extension of the container.
- the collar 10 is here internally threaded to receive a lid.
- the collar 10 has a greater diameter than the wall section 4 and the sealing face 7 is disposed in between in the same way as in Fig. 1.
- the collar 10 can also (not shown) have a section directed downwards, which encloses the threaded part at a distance.
- the lid 20 is threaded externally, but nevertheless has a collar-like part 39, which is directed downwards from the upper part 34 of the lid and which encloses the threaded part at a distance, for the sake of stiffening and gripping ability.
- the lid 20 has a wall section 32, the lower end of which passes in the main directly into the annular sealing part 28.
- Fig. 8 shows a fifth embodiment of the lid and container, in which the sealing face 7 of the container consists of the uppermost face 12 of the container. An upper wall section 14 is thereby lacking above the sealing face.
- the collar 10 is otherwise formed in the same way as in Fig. 1.
- the sealing face 28 consists of an annular section, which is positioned radially outside, and preferably above, the underside 24A of the lid part.
- the sealing face 7 of the container has a sealing ridge, the inner wall of which passes directly into the wall section 4.
- the wall section 32 provides stiffening, which in certain cases is necessary for sealing between the container and lid to remain satisfactory.
- Fig. 9 and 10 show two further embodiments for obtaining sealing between the lid 20 and container 1 at the uppermost face 12 of the lid.
- this is achieved by disposing an annular groove 41 in the surface 12 of the container 1.
- the lid 20 is provided in a corresponding manner with an annularly projecting part 43, which on threading in is intended to be pressed into the groove 41 , two annular sealing sections being obtained, since the wall sections in the groove 41 and the projecting part 43 respectively are somewhat inclined.
- a similar sealing face is obtained in the transition between the upper face 12 of the container and its wall section 4, where the downwardly directed wall section 32 of the lid will lie.
- sealing is achieved by the lid 20 being provided in its upper annular face 34 with a projecting part 45 intended to interact with the upper face 12 of the container part, which also forms the actual sealing face.
- Fig. 11 and 12 show that the container 1 and lid 10 can be formed with a small lug 47 A, 47B each at their free edges, the positioning of the lugs being adapted so that they lie right before one another when the container is closed.
- the two lugs can then be sealed to one another by e.g. welding, a seal being formed on the container.
- the two lugs can also have a perforation line 49 to facilitate opening of the seal.
- Fig. 11 and 12 show that larger pots can be provided advantageously with twist grips 51, 53.
- the twist grip 51 in the lid part 20 is formed as a number of projecting devices, which form a kind of bubbles 51. Four such bubbles 51 are best affixed in the lid part.
- Fig. 13 shows a variant of a container 1 with a lid 20, formed with twist grips 51, 53, in accordance with the principles which are evident from Fig. 11 and 12.
- twist grips 51, 53 not being executed as separate elements but at best on the lid consisting of an elongated ridge-shaped part, which extends diametrically a substantial distance of the lid's diameter and the twist grip 53 in the bottom section of the container 1 consisting correspondingly of an elongated recess, which also extends a substantial part of the diametrical distance, so that the ridge 51 can be gripped with a thumb-finger grip and the recess 53 by one or more fingers being placed inside this, following which the lid can simply be screwed up. Furthermore, it is shown that with a form of this kind, no gripping collar around the threaded closure is necessary.
- the upper surface 34 of the lid part also constitutes its outermost part.
- the seal 7, 28 between the container 1 and lid 20 is altogether formed essentially in accordance with what is shown in Fig. 3, and is thus also arranged rotationally symmetrically in this execution. It is shown that the outer edge of the lid and the outer edge of the container part are disposed coaxially, which can be an advantage in certain circumstances.
- the container and lid are manufactured by thermoforming, which is a very cost-effective method.
- a tool is designed commercially in such a way that a number of articles can be manufactured simultaneously.
- a relatively large sheet is fed to the tool, which after suitable heating is moved forward to the tool containing a multiplicity of forms, following which the plastic sheet is sucked in by means of a vacuum, for example, and takes on the contours according to the respective form.
- a vacuum for example
- the sheet with the formed articles is ejected from the forming tool to be moved to the subsequent punching operation.
- Ejection from the forming tool is normally effected by means of so-called ejectors, which are separate units interacting with the forming tool.
- said ejector tools can be eliminated by using the threads to eject the sheet. This is carried out by rotating the threaded part of each form in the forming tool. This can be achieved either by rotating the entire form area or by only rotating the threaded part.
- the advantage of only rotating the threaded part is that the container part 1 can then be allowed to assume shapes which are not rotationally symmetrical, for example a hexagonal shape, which results in a certain stiffening.
- the bottom section can be formed curved slightly inwards from the start, so that it becomes more level when the container is closed.
- the container can be placed on an upwardly curving, supporting base when it is closed.
- the invention is not restricted to the embodiments shown, but can be varied within the scope of the following claims. It is perceived for example that the number of thread ridges can be varied within wide limits, all the way from one to a multiplicity. Furthermore, it is perceived that many conceivable shapes other than hexagonal containers 1 can be manufactured according to the method according to the invention, for example triangular, star-shaped etc. In addition, it is perceived that the collar can be arranged to extend a substantial distance, it being possible in an extreme case, with a downwardly directed collar, that the threads would be able to be arranged around the lower part of the container.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Closures For Containers (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00914411A EP1178933B1 (en) | 1999-04-21 | 2000-03-01 | Thin-walled container and lid, and also a method for making |
AU35794/00A AU3579400A (en) | 1999-04-21 | 2000-03-01 | Thin-walled container and lid, and also a method for making |
DE60032763T DE60032763T2 (en) | 1999-04-21 | 2000-03-01 | THIN-WALLED CONTAINER WITH LID AND METHOD FOR THE PRODUCTION THEREOF |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9901415-1 | 1999-04-21 | ||
SE9901415A SE518637C2 (en) | 1999-04-21 | 1999-04-21 | Thermo-shaped container and lid made of thin-walled plastic and method of making the container and lid |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2000064771A1 true WO2000064771A1 (en) | 2000-11-02 |
WO2000064771B1 WO2000064771B1 (en) | 2000-12-21 |
Family
ID=20415290
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2000/000404 WO2000064771A1 (en) | 1999-04-21 | 2000-03-01 | Thin-walled container and lid, and also a method for making |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1178933B1 (en) |
AT (1) | ATE350293T1 (en) |
AU (1) | AU3579400A (en) |
DE (1) | DE60032763T2 (en) |
SE (1) | SE518637C2 (en) |
WO (1) | WO2000064771A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005000699A2 (en) * | 2003-06-06 | 2005-01-06 | S. C. Johnson Home Storage, Inc. | Container including a bowl and a lid each having interfitting lips |
WO2006018239A1 (en) * | 2004-08-12 | 2006-02-23 | Huhtamaki Alf | Receptacle comprising a lid |
EP1732817A2 (en) * | 2004-04-08 | 2006-12-20 | The Glad Products Company | Ventable spin lock container |
JP2019177944A (en) * | 2018-03-30 | 2019-10-17 | 株式会社吉野工業所 | Container with lid |
GB2584452A (en) * | 2019-06-04 | 2020-12-09 | Paccor Packaging Gmbh | Packaging system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3290418A (en) * | 1960-10-12 | 1966-12-06 | Harold E Best | Method and mold for making thinwalled containers |
US3759652A (en) * | 1969-05-22 | 1973-09-18 | Klm Co | Molding apparatus for making thermoformed articles |
US4099903A (en) * | 1976-04-15 | 1978-07-11 | Zafir Petrov | Core for deep draw molding a closure cap for bottles and the like |
US4934547A (en) * | 1987-02-10 | 1990-06-19 | Helena Laboratories Corporation | Specimen collection container and non-removable cover |
WO1999018002A1 (en) * | 1997-10-02 | 1999-04-15 | M & M Industries, Inc. | Open head container and lid assembly |
-
1999
- 1999-04-21 SE SE9901415A patent/SE518637C2/en not_active IP Right Cessation
-
2000
- 2000-03-01 EP EP00914411A patent/EP1178933B1/en not_active Expired - Lifetime
- 2000-03-01 DE DE60032763T patent/DE60032763T2/en not_active Expired - Lifetime
- 2000-03-01 AU AU35794/00A patent/AU3579400A/en not_active Abandoned
- 2000-03-01 AT AT00914411T patent/ATE350293T1/en not_active IP Right Cessation
- 2000-03-01 WO PCT/SE2000/000404 patent/WO2000064771A1/en active IP Right Grant
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3290418A (en) * | 1960-10-12 | 1966-12-06 | Harold E Best | Method and mold for making thinwalled containers |
US3759652A (en) * | 1969-05-22 | 1973-09-18 | Klm Co | Molding apparatus for making thermoformed articles |
US4099903A (en) * | 1976-04-15 | 1978-07-11 | Zafir Petrov | Core for deep draw molding a closure cap for bottles and the like |
US4934547A (en) * | 1987-02-10 | 1990-06-19 | Helena Laboratories Corporation | Specimen collection container and non-removable cover |
WO1999018002A1 (en) * | 1997-10-02 | 1999-04-15 | M & M Industries, Inc. | Open head container and lid assembly |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005000699A2 (en) * | 2003-06-06 | 2005-01-06 | S. C. Johnson Home Storage, Inc. | Container including a bowl and a lid each having interfitting lips |
WO2005000699A3 (en) * | 2003-06-06 | 2005-06-30 | S C Johnson Home Storage Inc | Container including a bowl and a lid each having interfitting lips |
US7063231B2 (en) | 2003-06-06 | 2006-06-20 | S. C. Johnson Home Storage, Inc. | Container including a bowl and a lid each having interfitting lips |
EP1732817A2 (en) * | 2004-04-08 | 2006-12-20 | The Glad Products Company | Ventable spin lock container |
EP1732817A4 (en) * | 2004-04-08 | 2009-04-29 | Glad Products Co | Ventable spin lock container |
WO2006018239A1 (en) * | 2004-08-12 | 2006-02-23 | Huhtamaki Alf | Receptacle comprising a lid |
EA010245B1 (en) * | 2004-08-12 | 2008-06-30 | Хутамаки Альф Цвайгнидерлассунг Дер Хутамаки Дойчланд Гмбх Унд Ко. Кг | Receptacle comprising a lid |
JP2019177944A (en) * | 2018-03-30 | 2019-10-17 | 株式会社吉野工業所 | Container with lid |
GB2584452A (en) * | 2019-06-04 | 2020-12-09 | Paccor Packaging Gmbh | Packaging system |
EP3747785A1 (en) * | 2019-06-04 | 2020-12-09 | PACCOR Packaging GmbH | Packaging system |
Also Published As
Publication number | Publication date |
---|---|
DE60032763D1 (en) | 2007-02-15 |
AU3579400A (en) | 2000-11-10 |
SE9901415D0 (en) | 1999-04-21 |
EP1178933A1 (en) | 2002-02-13 |
WO2000064771B1 (en) | 2000-12-21 |
SE518637C2 (en) | 2002-11-05 |
SE9901415L (en) | 2000-10-22 |
EP1178933B1 (en) | 2007-01-03 |
ATE350293T1 (en) | 2007-01-15 |
DE60032763T2 (en) | 2007-11-08 |
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