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WO2022123377A1 - A plastic cap for a container and an assembly comprising a container and a plastic cap - Google Patents

A plastic cap for a container and an assembly comprising a container and a plastic cap Download PDF

Info

Publication number
WO2022123377A1
WO2022123377A1 PCT/IB2021/060843 IB2021060843W WO2022123377A1 WO 2022123377 A1 WO2022123377 A1 WO 2022123377A1 IB 2021060843 W IB2021060843 W IB 2021060843W WO 2022123377 A1 WO2022123377 A1 WO 2022123377A1
Authority
WO
WIPO (PCT)
Prior art keywords
cap
container
cylindrical wall
assembly
cylindrical
Prior art date
Application number
PCT/IB2021/060843
Other languages
French (fr)
Inventor
Andrej MAČEK
Original Assignee
Sibo G. D.O.O.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sibo G. D.O.O. filed Critical Sibo G. D.O.O.
Publication of WO2022123377A1 publication Critical patent/WO2022123377A1/en

Links

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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B65D41/06—Threaded or like caps or cap-like covers secured by rotation with bayonet cams, i.e. removed by first pushing axially to disengage the cams and then rotating
    • 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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0407—Threaded or like caps or cap-like covers secured by rotation with integral sealing means
    • B65D41/0428—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a collar, flange, rib or the like contacting the top rim or the top edges or the external surface of a container neck
    • 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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0471—Threaded or like caps or cap-like covers secured by rotation with means for positioning the cap on the container, or for limiting the movement of the cap, or for preventing accidental loosening of the cap

Definitions

  • a plastic cap for a container and an assembly comprising a container and a plastic cap
  • the invention relates to a plastic cap for a container and to an assembly comprising a container and a plastic cap.
  • a classic cap which has a cylindrical wall that is provided on the inside with a thread which can engage an outer thread formed on the neck of the container.
  • An example of such a cap is known from U.S. Pat. No. 4,402,415 A.
  • a disadvantage of such a cap is that, in the worst case, it is necessary to fully rotate the cap on the neck of the container before the inner thread of the cap engages the outer thread on the neck of the container, and then more rotations are needed for the cap to take its closed position and this is time consuming.
  • US RE37 243 E discloses a container cap that is provided with a plurality of circumferentially spaced thread-shaped gaps that can engage a plurality of circumferentially spaced thread-shaped ridges on the neck of the container.
  • a full rotation is no longer required to bring the grooves into engagement with the ridges, and the number of turns of the cap on the neck of the container required to bring the cap into the closed position is smaller.
  • the technical problem is how to provide a plastic cap for a container, which will be easy to position on the neck of the container, which can be quickly moved to the closed position (with a small twist on the neck of the container) and which will require a small amount of plastic for the production.
  • a plastic cap comprising: an outer cylindrical wall, a bottom closing the outer cylindrical wall at one end, an inner cylindrical wall extending from the bottom in the same direction as the outer cylindrical wall and arranged coaxially with the outer cylindrical wall, and at least two cylindrical pins, preferably at least three cylindrical pins, which are arranged on the inner side of the inner cylindrical wall proximal to its outer edge at the same height and are evenly spaced around the circumference.
  • the advantage of the cap according to the invention is that less plastic is needed for its production. If the cylindrical pins were arranged on the outer wall, this wall should be formed rigidly to prevent deformation of the cap when it is mounted on the container shoulder, as deformation makes it difficult to position the cap on the container shoulder. In fact, the rigidity of the wall is achieved with a greater wall thickness. In the cap according to the invention, the outer wall can be formed thin, since its deformation does not affect the positioning of the cap on the container shoulder. Material savings can be up to 30%. This means lower material consumption and thus greater economy on the one hand and less waste on the other.
  • Figure 1 Cap in perspective view
  • Figure 4 Container shoulder and neck in perspective view
  • Figure 5 Container shoulder and neck in side view
  • a plastic cap 10 comprising: an outer cylindrical wall 11, a bottom 12 closing the outer cylindrical wall 11 at one end, an inner cylindrical wall 13 extending from the bottom 12 in the same direction as the outer cylindrical wall and arranged coaxially with the outer cylindrical wall 11, and at least two cylindrical pins 14, preferably at least three cylindrical pins, which are arranged on the inner side of the inner cylindrical wall 13 proximal to its outer edge at the same height and are evenly spaced around the circumference.
  • the cap according to the invention can be provided with two cylindrical pins, but this embodiment does not ensure a plane-parallel arrangement of the cap on the container shoulder.
  • the cap has at least three cylindrical pins, thus providing for a plane-parallel arrangement of the cap on the container shoulder.
  • the cap 10 may be further provided with an annular ridge 15 arranged on the inner side of the bottom 12 of the cap coaxially with the cylindrical walls. The purpose of the ridge is to press against the upper surface of the container neck in the position when it is mounted on the container, thus ensuring a good seal of the cap.
  • Suitable plastic materials for producing the cap are polypropylene (PP) and high-density polyethylene (PE HD).
  • a further subject of the invention is an assembly of parts comprising said plastic cap 10 and a container 20, in particular a tube, comprising: a container body 21 for receiving a medium, a neck 22 for dispensing the medium and a shoulder 23 connecting the container body 21 to the neck 22, wherein the shoulder portion is formed of solid portions 24 and gaps 25 evenly spaced in alternations around the circumference of the shoulder, the number of solid portions 24 or gaps 25 respectively corresponding to the number of cylindrical pins 14 of the cap, and wherein a groove 24a is made in the solid portion from the outer direction of the circumference to receive the cylindrical pin of the cap, the groove descending slightly from a lower surface 25a of the gap downwards.
  • the inclination of surfaces 24c of the groove is 8 to 12° with respect to the horizontal, preferably about 9.5°.
  • An end portion 24d of the groove may be formed horizontally oriented.
  • the horizontally oriented groove section makes it easier to control the height of fit of the cap on the shoulder and the force with which the cap presses on the container neck when the cap is in the closed position.
  • At least one groove may be further provided with a protrusion 24b arranged in a way to fix the cylindrical pin 14 in the closed position of the cap. The protrusion keeps the cap in the closed position. At the same time, the "click" caused by the passage of the cylindrical pin 14 past the protrusion 24b when closing the container with the cap is an indication to the user that the cap is in the final, i.e. closed position.
  • Circumferential vertical surfaces 25c of the gaps may be provided at the upper end with a first chamfer or with a first rounding 25b.
  • the purpose of the first chamfer or the first rounding is to make it easier to centre the cap on the container shoulder.
  • upper surfaces 24e of the solid parts at the end facing the grooves are provided with a second chamfer or with a second rounding 24f.
  • the purpose of this second chamfer or second rounding is to make the cap slide into the depth more smoothly when the cylindrical pins first abut the upper surfaces of the solid parts when closing the container and only slide into the gap after the cap has been twisted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Abstract

The invention relates to a plastic cap (10) comprising an outer cylindrical wall (11), a bottom (12) closing the outer cylindrical wall (11) at one end, an inner cylindrical wall (13) extending from the bottom (12) in the same direction as the outer cylindrical wall and arranged coaxially with the outer cylindrical wall (11) and at least two cylindrical pins (14), preferably at least three cylindrical pins, which are arranged on the inner side of the inner cylindrical wall (13). The advantage of the cap according to the invention is that less plastic is needed for its production. The outer wall can be formed thin, since its deformation does not affect the positioning of the cap on the container shoulder. The subject of the invention is also an assembly of parts comprising said cap (10) and a container (20) comprising a container body (21), a neck (22) and a shoulder (23), the part of the shoulder being formed of solid portions (24) and gaps (25), and a groove (24a) is made in the solid portion from the outer direction of the circumference to receive the cylindrical pin of the cap.

Description

A plastic cap for a container and an assembly comprising a container and a plastic cap
Field of Invention
The invention relates to a plastic cap for a container and to an assembly comprising a container and a plastic cap.
Prior art
From the prior art, a classic cap is known which has a cylindrical wall that is provided on the inside with a thread which can engage an outer thread formed on the neck of the container. An example of such a cap is known from U.S. Pat. No. 4,402,415 A. A disadvantage of such a cap is that, in the worst case, it is necessary to fully rotate the cap on the neck of the container before the inner thread of the cap engages the outer thread on the neck of the container, and then more rotations are needed for the cap to take its closed position and this is time consuming.
US RE37 243 E discloses a container cap that is provided with a plurality of circumferentially spaced thread-shaped gaps that can engage a plurality of circumferentially spaced thread-shaped ridges on the neck of the container. In this variant, a full rotation is no longer required to bring the grooves into engagement with the ridges, and the number of turns of the cap on the neck of the container required to bring the cap into the closed position is smaller.
In recent times, the problem of plastic waste has become increasingly acute. For both ecological and economic reasons, the desire is to reduce the amount of plastic needed to make a cap. Technical problem
The technical problem is how to provide a plastic cap for a container, which will be easy to position on the neck of the container, which can be quickly moved to the closed position (with a small twist on the neck of the container) and which will require a small amount of plastic for the production.
Solution to the technical problem
The relative expressions such as above, below, vertically, etc. are defined with respect to the container, when it is vertically oriented, i.e. the bottom of the container is below and the neck of the container is above and the cap is oriented so that it can be arranged on the neck of the container.
The technical problem is solved with a plastic cap comprising: an outer cylindrical wall, a bottom closing the outer cylindrical wall at one end, an inner cylindrical wall extending from the bottom in the same direction as the outer cylindrical wall and arranged coaxially with the outer cylindrical wall, and at least two cylindrical pins, preferably at least three cylindrical pins, which are arranged on the inner side of the inner cylindrical wall proximal to its outer edge at the same height and are evenly spaced around the circumference.
The advantage of the cap according to the invention is that less plastic is needed for its production. If the cylindrical pins were arranged on the outer wall, this wall should be formed rigidly to prevent deformation of the cap when it is mounted on the container shoulder, as deformation makes it difficult to position the cap on the container shoulder. In fact, the rigidity of the wall is achieved with a greater wall thickness. In the cap according to the invention, the outer wall can be formed thin, since its deformation does not affect the positioning of the cap on the container shoulder. Material savings can be up to 30%. This means lower material consumption and thus greater economy on the one hand and less waste on the other.
Figure 1: Cap in perspective view
Figure 2: Cap in cross-section
Figure 3: Assembly of parts in cross-section
Figure 4: Container shoulder and neck in perspective view
Figure 5: Container shoulder and neck in side view
The invention is described in more detail in the following.
The technical problem is solved with a plastic cap 10 comprising: an outer cylindrical wall 11, a bottom 12 closing the outer cylindrical wall 11 at one end, an inner cylindrical wall 13 extending from the bottom 12 in the same direction as the outer cylindrical wall and arranged coaxially with the outer cylindrical wall 11, and at least two cylindrical pins 14, preferably at least three cylindrical pins, which are arranged on the inner side of the inner cylindrical wall 13 proximal to its outer edge at the same height and are evenly spaced around the circumference.
The cap according to the invention can be provided with two cylindrical pins, but this embodiment does not ensure a plane-parallel arrangement of the cap on the container shoulder. According to a preferred embodiment, the cap has at least three cylindrical pins, thus providing for a plane-parallel arrangement of the cap on the container shoulder. The cap 10 may be further provided with an annular ridge 15 arranged on the inner side of the bottom 12 of the cap coaxially with the cylindrical walls. The purpose of the ridge is to press against the upper surface of the container neck in the position when it is mounted on the container, thus ensuring a good seal of the cap.
Examples of suitable plastic materials for producing the cap are polypropylene (PP) and high-density polyethylene (PE HD).
A further subject of the invention is an assembly of parts comprising said plastic cap 10 and a container 20, in particular a tube, comprising: a container body 21 for receiving a medium, a neck 22 for dispensing the medium and a shoulder 23 connecting the container body 21 to the neck 22, wherein the shoulder portion is formed of solid portions 24 and gaps 25 evenly spaced in alternations around the circumference of the shoulder, the number of solid portions 24 or gaps 25 respectively corresponding to the number of cylindrical pins 14 of the cap, and wherein a groove 24a is made in the solid portion from the outer direction of the circumference to receive the cylindrical pin of the cap, the groove descending slightly from a lower surface 25a of the gap downwards. The inclination of surfaces 24c of the groove is 8 to 12° with respect to the horizontal, preferably about 9.5°. An end portion 24d of the groove may be formed horizontally oriented. The horizontally oriented groove section makes it easier to control the height of fit of the cap on the shoulder and the force with which the cap presses on the container neck when the cap is in the closed position.
It is sufficient for the groove to extend beyond a circumferential angle of 15 to 25° when viewed from the central axis of the container. Consequently, when closing the container with the cap, only a 15 to 25° twist of the cap is required once the cylindrical pins engage the grooves for the cap to reach its final closed position. At least one groove may be further provided with a protrusion 24b arranged in a way to fix the cylindrical pin 14 in the closed position of the cap. The protrusion keeps the cap in the closed position. At the same time, the "click" caused by the passage of the cylindrical pin 14 past the protrusion 24b when closing the container with the cap is an indication to the user that the cap is in the final, i.e. closed position.
Circumferential vertical surfaces 25c of the gaps may be provided at the upper end with a first chamfer or with a first rounding 25b. The purpose of the first chamfer or the first rounding is to make it easier to centre the cap on the container shoulder.
Also, upper surfaces 24e of the solid parts at the end facing the grooves are provided with a second chamfer or with a second rounding 24f. The purpose of this second chamfer or second rounding is to make the cap slide into the depth more smoothly when the cylindrical pins first abut the upper surfaces of the solid parts when closing the container and only slide into the gap after the cap has been twisted.

Claims

6 Claims
1. A plastic cap (10) comprising: an outer cylindrical wall (11), a botom (12) closing the outer cylindrical wall (11) at one end, an inner cylindrical wall (13) extending from the botom (12) in the same direction as the outer cylindrical wall and arranged coaxially with the outer cylindrical wall (11), and at least two cylindrical pins (14) which are arranged on the inner side of the inner cylindrical wall (13) proximal to its outer edge at the same height and are evenly spaced around the circumference.
2. The cap (10) according to claim 1, characterized by comprising at least three cylindrical pins.
3. The cap (10) according to any of preceding claims, characterized by being provided with an annular ridge (15) arranged on the inner side of the botom (12) of the cap coaxially with the cylindrical walls.
4. An assembly of parts comprising a cap (10) according to any of preceding claims and a container (20), in particular a tube, comprising: a container body (21) for receiving a medium, a neck (22) for dispensing the medium and a shoulder (23) connecting the container body (21) with the neck (22), wherein the shoulder portion is formed of solid portions (24) and gaps (25) evenly spaced in alternations around the circumference of the shoulder, the number of solid portions (24) and gaps (25) corresponding to the number of cylindrical pins (14) of the cap, and 7 wherein a groove (24a) is made in the solid portion from the outer direction of the circumference to receive the cylindrical pin of the cap, the groove descending slightly from a lower surface (25a) of the gap downwards.
5. The assembly of parts according to claim 4, characterized in that the inclination of surfaces (24c) of the groove is 8 to 12° with respect to the horizontal, preferably about 9.5°.
6. The assembly of parts according to claim 4 or 5, characterized in that the end portion (24d) of the groove is formed horizontally oriented.
7. The assembly of parts according to any of claims 4 to 6, characterized in that at least one groove (24a) is provided with a protrusion (24b) arranged in a way to fix the cylindrical pin (14) in the closed position of the cap.
8. The assembly of parts according to any of claims 4 to 7, characterized in that circumferential vertical surfaces (25c) of the gaps are provided at the upper end with a first chamfer or with a first rounding (25b).
9. The assembly of parts according to any of claims 4 to 8, characterized in that upper surfaces (24e) of the solid parts at the end facing the grooves (24a) are provided with a second chamfer or with a second rounding (24f).
PCT/IB2021/060843 2020-12-08 2021-11-23 A plastic cap for a container and an assembly comprising a container and a plastic cap WO2022123377A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SIP-202000226 2020-12-08
SI202000226A SI26130A2 (en) 2020-12-08 2020-12-08 A plastic lid for a container and a set of parts comprising a plasticcontainer and a plastic lid

Publications (1)

Publication Number Publication Date
WO2022123377A1 true WO2022123377A1 (en) 2022-06-16

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ID=79021747

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2021/060843 WO2022123377A1 (en) 2020-12-08 2021-11-23 A plastic cap for a container and an assembly comprising a container and a plastic cap

Country Status (2)

Country Link
SI (1) SI26130A2 (en)
WO (1) WO2022123377A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024058970A1 (en) * 2022-09-15 2024-03-21 Cryoport, Inc. Vapor plug locking collar

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3706401A (en) * 1970-07-15 1972-12-19 Sunbeam Plastics Corp Child-proof overcap for an aerosol can
WO2012113384A2 (en) * 2011-02-25 2012-08-30 Linhardt Gmbh & Co. Kg Tube packaging
US20170001763A1 (en) * 2015-07-01 2017-01-05 Chris Hui Chuan Hu Bottle Cap
KR20200025419A (en) * 2018-08-30 2020-03-10 임종수 Container lid combination device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3706401A (en) * 1970-07-15 1972-12-19 Sunbeam Plastics Corp Child-proof overcap for an aerosol can
WO2012113384A2 (en) * 2011-02-25 2012-08-30 Linhardt Gmbh & Co. Kg Tube packaging
US20170001763A1 (en) * 2015-07-01 2017-01-05 Chris Hui Chuan Hu Bottle Cap
KR20200025419A (en) * 2018-08-30 2020-03-10 임종수 Container lid combination device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024058970A1 (en) * 2022-09-15 2024-03-21 Cryoport, Inc. Vapor plug locking collar

Also Published As

Publication number Publication date
SI26130A2 (en) 2022-06-30

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