CN116997515A - Plastic screw cap with good washability - Google Patents
Plastic screw cap with good washability Download PDFInfo
- Publication number
- CN116997515A CN116997515A CN202280022170.2A CN202280022170A CN116997515A CN 116997515 A CN116997515 A CN 116997515A CN 202280022170 A CN202280022170 A CN 202280022170A CN 116997515 A CN116997515 A CN 116997515A
- Authority
- CN
- China
- Prior art keywords
- protrusion
- container
- skirt wall
- flow path
- inclined surface
- 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.)
- Pending
Links
- 239000004033 plastic Substances 0.000 title claims abstract description 17
- 229920003023 plastic Polymers 0.000 title claims abstract description 17
- 210000000078 claw Anatomy 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 27
- 238000004140 cleaning Methods 0.000 abstract description 10
- 238000005406 washing Methods 0.000 description 9
- 238000007664 blowing Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- -1 polypropylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
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
- B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
- B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
- B65D41/3442—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container
- B65D41/3447—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container the tamper element being integrally connected to the closure by means of bridges
-
- 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
- B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
- B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
- B65D41/3442—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on 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
- 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
- B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
- B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
- B65D41/3423—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt
- B65D41/3428—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt the tamper element being integrally connected to the closure by means of bridges
-
- 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
-
- 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
- B65D51/00—Closures not otherwise provided for
- B65D51/24—Closures not otherwise provided for combined or co-operating with auxiliary devices for non-closing purposes
-
- 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
- B65D2401/00—Tamper-indicating means
- B65D2401/15—Tearable part of the closure
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Abstract
A plastic threaded cap with tamper evident band is provided which ensures improved removal of cleaning water. A plastic screw cap (1), comprising: a top plate (3); a skirt wall (5) and a tamper evident band (TE band) connected to the lower end of said skirt wall (5) via a breakable bridge and comprising, on its inner surface, a snap-in protrusion (19) capable of being snapped onto the lower surface of a container claw (53). The TE band (7) further includes, on its inner surface, a flow-path-forming protrusion (30) that is located above the engagement protrusion (19) and abuts against the outer surface of the container claw (53) to form a flow path between the container claw (53) and the inner surface of the skirt wall (5).
Description
Technical Field
The present invention relates to a plastic screw cap. More particularly, the present invention relates to a plastic screw cap having good washability.
Background
The plastic threaded cap has a top plate and a skirt wall extending downwardly from the periphery of the top plate. The skirt wall includes on its inner surface a thread (internal thread) to be engaged with a thread (external thread) provided on the outer surface of the container finish. At the lower end of the skirt wall a tamper evident band (TE band) is provided via a breakable bridge. The TE strap includes, on its inner surface, an engagement protrusion that is engageable with a lower surface of the container claw. When the lid is rotated in the opening direction, the skirt wall of the lid is allowed to rise along the outer surface of the container mouth while the rising movement of the TE band is restricted due to the engagement of the engagement protrusion to the lower surface of the container claw. Next, as the lid continues to rotate in the opening direction, the bridge connecting the skirt wall of the lid and the TE strap breaks. Thus, the TE strap is separated from the cap removed from the container mouth. In other words, if the TE strap is separated from the lid, it indicates that the lid has been opened and removed from the mouth of the container. Thus, the TE tape serves as a tamper-evident function and ensures the quality of the container contents.
At the same time, screw caps having the above TE bands have problems in terms of washability thereof, which requires improvement.
More specifically, before the screw cap is mounted to the container, it is washed with water or the like, and then dried by blowing air, thereby removing the washing water in the cap. The problem is that the residual cleaning water in the cover is accumulated on the upper surface of the container claw. The cleaning water accumulated on the upper surface of the container claw portion flows out slowly to the outer surface of the TE band through a minute gap between the skirt wall of the cover and the TE band. As a result, the print or the like on the outer surface of the TE band becomes blurred. The problem of removal of the washing water is very prominent when the filling and capping of the containers is done on a high-speed production line. This may be because the cleaned lid is typically not completely dried prior to installation into the container.
Generally, water accumulated on the upper surface of the claw portion of the container sealed with the lid is removed by blowing air through a minute gap between the skirt wall of the lid attached to the container and the TE band. However, the engaging protrusion formed at the lower portion of the TE belt to be engaged to the lower surface of the container claw portion hinders the flow of the washing water accumulated at the upper surface of the container claw portion, thereby making it difficult to remove the water by blowing air. In particular, water removal has become more difficult in recently proposed lids that take measures to prevent the TE tape from slipping off when opened and removed from the container mouth. For example, patent document 1 proposes a screw cap including an annular inclined surface having an inverted truncated cone shape, which is formed on an upper side of an engagement protrusion on an inner surface of a TE band. When the cover is opened, the annular inclined surface is brought into close contact with the outer peripheral surface of the container claw portion, thereby preventing the TE band from slipping off. With this structure, the cleaning water accumulated on the upper surface of the container claw portion is more difficult to drain.
In order to allow the cleaning water accumulated on the upper surface of the container claw to flow downward easily, patent document 2 proposes a cover in which the TE belt is provided on its inner surface with a plurality of axially extending grooves above engaging protrusions to be engaged to the lower surface of the container claw. However, since these grooves are formed on the inner surface of the TE belt, they are limited in depth, resulting in insufficient removal of the washing water. Thus, in the case of high-speed filling, for example, the print can still sometimes be obscured by the flushing water.
Prior art literature
Patent literature
Patent document 1: JP-B2-6393497
Patent document 2: JP-B2-6373099
Disclosure of Invention
Problems to be solved by the invention
It is therefore an object of the present invention to provide a plastic screw cap with a tamper evident band which has improved washability, so that less washing water remains.
Means for solving the problems
The invention provides a plastic threaded cap, comprising: a top plate; a skirt wall extending downwardly from the periphery of the top panel and including threads on an inner surface thereof to be threadably connected with an outer surface of the container finish; a tamper evident band connected to the lower end of the skirt wall via a breakable bridge and comprising, on its inner surface, an engagement protrusion capable of engaging to the lower surface of the container claw. The tamper evident band further includes, on an inner surface thereof, a flow passage forming protrusion that is located above the engaging protrusion and abuts an outer surface of the container claw to form a flow passage between the container claw and an inner surface of the skirt wall.
Suitable for the plastic screw cap of the invention are:
(1) An annular inclined surface or a circumferentially discontinuous arc-shaped inclined surface is formed in a region continuous with the upper surface of the engagement projection such that the inclined surface gradually thickens from the top toward the upper end point of the engagement projection, and the flow passage forming projection is provided above the annular inclined surface or the arc-shaped inclined surface.
(2) The plurality of engaging projections are formed at regular intervals in the circumferential direction, and the flow passage forming projections are provided at positions above the engaging projections between the adjacent two engaging projections in the pair.
(3) The flow passage forming protrusion has an axially extending rib shape or a block shape.
Technical effects of the invention
The novel feature of the cover of the present invention is that the TE strap has, on its inner surface, a flow-path-forming protrusion above an engaging protrusion to be engaged to the lower surface of the container claw. In a state where the cover is attached to the container mouth, the flow passage forming protrusion abuts against the outer surface of the container claw, thereby allowing a space to be formed around the flow passage forming protrusion between the TE band and the container claw. Further, in this state, the engaging protrusion is kept away from the lower surface of the container claw portion, whereas when the cover is opened, the engaging protrusion restricts the upward movement of the cover by engaging to the lower surface of the container claw portion. In other words, the space formed between the TE band and the container claw portion by the flow passage forming protrusion is not closed by the engaging protrusion but communicates with the external space. This enables the space formed around the flow path forming protrusion to be used as a flow path for discharging the cleaning fluid. Therefore, the cleaning fluid stored on the upper surface of the container claw portion can be discharged to the outside through the space between the flow passage forming protrusion and the container claw portion by the air blown through the gap formed between the TE band and the skirt wall.
In this way, the cap of the present invention exhibits excellent washability (water removal), thereby effectively preventing the print on the outer surface of the TE tape from becoming blurred by, for example, the cleaning fluid deposited on the cap.
As in patent document 2, if the TE belt has axially extending grooves intended to serve as flow paths, such grooves need to be wide and deep, which results in a significant decrease in strength of the TE belt. Thereby, the TE band becomes easily deformed, resulting in the engaging protrusion not being convenient to pass over the container claw portion when the cover is being opened. To avoid this, the width and depth of the grooves are limited in such a way that they cannot be used completely as a flow path for the discharge of the cleaning fluid. However, the cap of the present invention employs protrusions rather than grooves to form the flow path, thereby ensuring removal of water without the aforementioned inconveniences, such as even when it is handled by a high speed filling capping machine.
Drawings
FIG. 1 is a partial vertical cross-sectional view showing the plastic closure and container finish of the present invention;
FIG. 2 is a view showing a section A-A in FIG. 1;
fig. 3 is a view for explaining the function of the flow path forming protrusion in the present invention;
FIG. 4 is a partially exploded view of a TE band in the plastic cover of the present invention;
fig. 5 is a view showing an example of another embodiment of the flow path forming protrusion in the present invention.
Reference numerals:
1: a cover; 3: a top plate; 5: a skirt wall; 7: a TE band; 9: a slit; 13: an inner ring; 19: an engagement protrusion; 30: a flow path forming protrusion; 50: a container mouth; 53: a claw portion; x: a space; y: cleaning water droplet
Detailed Description
Referring to fig. 1, a plastic screw cap (hereinafter, may be simply referred to as a cap) of the present invention is generally designated by reference numeral 1. The cap 1 is screwed onto and attached to the container finish 50. A screw thread (external screw thread) 51 is formed on the outer surface of the container mouth 50. A claw portion (rib) 53 having a larger diameter than the screw thread 51 is formed below the screw thread 51. A support ring 55 having a larger diameter is formed on the lower side of the claw portion 53 for portability, positioning, and the like.
The lid 1 has a top plate 3 and a skirt wall 5 extending downwardly from the periphery of the top plate 3. The lower end of the skirt wall 5 is connected to a TE band (tamper evident band) 7 via a plurality of breakable bridges (not shown in the figures). A slit 9 having a minute gap is formed between the lower end of the skirt wall 5 and the upper end of the TE strap 7.
The skirt wall 5 comprises a thread (internal thread) 11 on its inner surface, which thread 11 is intended to be screwed with a thread 51 provided in the container mouth 50.
An inner ring 13 is provided on the inner surface of the top plate 3 extending downwardly away from the skirt wall 5. A short auxiliary protrusion 15 inclined outward is formed in the circumferential direction at the outer side of the inner ring 13. Small flat protrusions 17 are formed between the inner ring 13 and the auxiliary protrusions 15 in the circumferential direction.
A hook-shaped engaging protrusion 19 is formed on the inner surface of the TE belt 7.
With this structure, when the cap 1 placed on the container finish 50 is rotated in the closing direction, the cap is allowed to descend as the threads 11 of the cap 1 are screwed together with the threads 51 of the container finish 50. Accordingly, the upper end of the container mouth 50 is inserted into the space between the inner ring 13 and the auxiliary projection 15 formed on the inner surface of the top plate 3 until the upper end surface of the container mouth 50 abuts against the flat surface of the small flat projection 17, whereby the container mouth 50 is sealed. At this time, the engaging protrusion 19 of the TE belt 7 passes over the claw portion 53 and is located below the claw portion 53.
An inclined surface 21 is formed on the upper side of the engaging protrusion 19 provided on the inner surface of the TE belt 7 such that the inclined surface 21 becomes gradually thicker from the top to the bottom toward the upper end point of the engaging protrusion 19. The inclined surface 21 is described in detail in patent document 1, for example.
When the lid 1 in the closed state is rotated in the opening direction, the skirt wall 5 is allowed to rise with the screw 11 and the screw 51 released from the screw connection, however, the rising movement of the TE strap 7 is restricted by the engagement of the rising engagement projection 19 to the lower surface of the claw portion 53. Thereby, stress is concentrated on the breakable bridge (not shown in the figure) connecting the skirt wall 5 and the TE band 7, allowing the bridge to break. Thus, the TE strap 7 is separated from the skirt wall 5. At this time, if the TE strap 7 rises rapidly in response to rotation in the opening direction, the engaging protrusion 19 may go over the claw portion 53, thereby causing the TE strap 7 still connected to the skirt wall 5 to slide off from the container mouth 50. To avoid this, an inclined surface 21 is formed to allow the TE strap 7 to rise stepwise until the engaging protrusion 19 engages with the claw portion 53. Thus, the TE belt 7 is effectively prevented from slipping off.
Thus, if the TE-tape 7 is separated from the lid 1 removed from the container mouth 50, it is clearly indicated that the lid has been opened.
As shown in fig. 1, according to the cover 1 having the TE strap 7 of the present invention, the TE strap 7 has the flow passage forming protrusion 30 provided on the upper side of the engaging protrusion 19 on the inner surface thereof. The flow passage forming protrusion 30 is provided such that it is positioned to face and abut the claw portion 53.
As shown in fig. 2 (A-A section in fig. 1 is shown), a space X is formed around the flow path forming protrusion 30 between the inner surface of the TE strip 7 and the outer surface of the claw portion 53.
Referring to fig. 3, the function of the flow passage forming protrusion 30 will be described. In the conventional cap without the flow-path-forming projections 30 as shown in fig. 3 (a), the inner surface of the TE strap 7 is in contact with the outer surface of the claw portion 53. With this structure, even if air is blown through the slit 9 to the droplets Y of the washing water that may be accumulated on the upper surface of the claw portion 53, the droplets Y flow out through the slit 9 due to the lack of a flow path of the droplets Y under the claw portion 53. Thereby, the droplet Y flows through the slit 9, adheres to the outer surface of the TE belt 7, and causes blurring of an inkjet print or the like prepared on the outer surface of the TE belt 7.
On the other hand, in the present invention, the flow path forming projections 30 provided on the inner surface of the TE belt 7 allow the space X to be formed around the flow path forming projections 30 between the inner surface of the TE belt 7 and the outer surface of the claw portion 53. Further, a gap is formed between the engaging protrusion 19 and the lower surface of the claw portion 53. Therefore, a flow path to the lower side of the claw portion 53 exists between the claw portion 53 and the inner surface of the skirt wall 5. With this structure, as shown in fig. 3 (b), when air is blown through the slit 9 to the droplets Y of the washing water that may be accumulated on the upper surface of the claw portion 53, the droplets Y flow to the lower side of the claw portion 53 through the flow path and are discharged without adhering to the outer surface of the TE belt 7.
As described above, the cap 1 of the present invention can sufficiently remove the washing water, thereby effectively preventing the print from being blurred due to, for example, the water remaining in the cap 1.
In order to maximize the water removal effect of the flow path forming projections 30 in the present invention, it is preferable that the plurality of engaging projections 19 are formed at intervals in the circumferential direction according to the size of the cover 1, and the flow path forming projections 30 are formed between the pair of adjacent engaging projections 19 at positions above the engaging projections 19, as shown in fig. 4 which shows a partially exploded view of the TE belt 7. For example, in the case of a cover having a nominal diameter of 28 mm, it is desirable to form about three to nine snap projections 19 at a total spacing of about 1% to 50% of the circumference of the TE band 7. This allows a sufficient space X to be formed around the flow path forming protrusion 30, thereby effectively removing the washing water by blowing air. As long as the flow passage forming projections 30 are located above the engaging projections 19, the flow passage forming projections 30 may axially overlap with both circumferential ends of the engaging projections 19, as shown in fig. 5.
The flow-path-forming protrusion 30 is in the form of an axially extending rib in the example shown in fig. 4, or alternatively it may be in the form of a block as shown in fig. 5. In either case, the shape and height of the flow passage forming protrusion 30, the positional relationship between the flow passage forming protrusion and the engaging protrusion 19, and the like may be set to maximize the water removal effect in consideration of the release characteristics during molding of the cover. For example, the height of the flow path forming protrusion 30 is suitably about 0.05 to 0.30 mm. In the example shown in fig. 4, between the adjacent locking projections 19, only a single flow passage forming projection 30 is provided above the locking projection 19; however, a plurality of flow path forming projections 30 may be provided.
As shown in patent document 1, minute ribs are sometimes formed on the inclined surface above the engaging projections 19 on the inner surface of the TE belt 7. These ribs are provided to allow the TE strap 7 separated from the cover 1 to fall down quickly without resting on the outer surface of the claw portion 53. Since these ribs are not flow paths for forming the removal water, their heights are very low, and are formed at a position lower than the flow path forming protrusions 30 in the present invention; therefore, they have little water removal function.
The cap 1 of the present invention described above can be easily manufactured from a thermoplastic resin such as an olefin-based resin (e.g., polypropylene, polyethylene, etc.) by injection molding or compression molding.
Claims (4)
1. A plastic threaded cap, comprising:
a top plate;
a skirt wall extending downwardly from the periphery of the top panel and including threads on an inner surface thereof to be threadably connected with an outer surface of the container finish; and
a tamper evident band connected to the lower end of the skirt wall via a breakable bridge and comprising, on its inner surface, a snap-in protrusion capable of snapping to the lower surface of the container claw; wherein the method comprises the steps of
The tamper evident band further includes a flow path forming protrusion on an inner surface thereof, the flow path forming protrusion being located above the engagement protrusion and abutting an outer surface of the container claw to form a flow path between the container claw and an inner surface of the skirt wall.
2. The plastic screw cap according to claim 1, wherein an annular inclined surface or a circumferentially discontinuous arc-shaped inclined surface is formed in a region continuous with the upper surface of the snap projection such that the inclined surface gradually thickens from the top toward the upper end point of the snap projection, and
the flow passage forming protrusion is provided above the annular inclined surface or the arc-shaped inclined surface.
3. The plastic screw cap according to claim 1, wherein a plurality of the engaging protrusions are formed at uniform intervals in a circumferential direction, and
the flow passage forming protrusion is provided above the engaging protrusion between two adjacent engaging protrusions in the pair.
4. The plastic screw cap according to claim 1, wherein the flow path forming protrusion has an axially extending rib shape or a block shape.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021056636A JP2022153878A (en) | 2021-03-30 | 2021-03-30 | Plastic screw cap excellent in cleanability |
| JP2021-056636 | 2021-03-30 | ||
| PCT/JP2022/011522 WO2022209844A1 (en) | 2021-03-30 | 2022-03-15 | Plastic screw cap having excellent washability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116997515A true CN116997515A (en) | 2023-11-03 |
Family
ID=83458920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280022170.2A Pending CN116997515A (en) | 2021-03-30 | 2022-03-15 | Plastic screw cap with good washability |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20240124197A1 (en) |
| EP (1) | EP4317008A1 (en) |
| JP (1) | JP2022153878A (en) |
| KR (1) | KR20230162070A (en) |
| CN (1) | CN116997515A (en) |
| WO (1) | WO2022209844A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5019465B2 (en) * | 2008-01-31 | 2012-09-05 | 日本クラウンコルク株式会社 | Plastic cap |
| FR2987607B1 (en) * | 2012-03-05 | 2015-07-24 | Tetra Laval Holdings & Finance | CAP FOR A COLLAR OF CONTAINER |
| JP6393497B2 (en) | 2014-03-25 | 2018-09-19 | 日本クロージャー株式会社 | Plastic container lid |
| JP6373099B2 (en) | 2014-07-10 | 2018-08-15 | 日本クロージャー株式会社 | Synthetic resin container lid and combination of container lid and container |
| JP6688686B2 (en) * | 2016-06-08 | 2020-04-28 | 日本クロージャー株式会社 | Synthetic resin container lid |
-
2021
- 2021-03-30 JP JP2021056636A patent/JP2022153878A/en active Pending
-
2022
- 2022-03-15 CN CN202280022170.2A patent/CN116997515A/en active Pending
- 2022-03-15 US US18/277,859 patent/US20240124197A1/en active Pending
- 2022-03-15 WO PCT/JP2022/011522 patent/WO2022209844A1/en active Application Filing
- 2022-03-15 KR KR1020237037024A patent/KR20230162070A/en unknown
- 2022-03-15 EP EP22780065.3A patent/EP4317008A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP4317008A1 (en) | 2024-02-07 |
| WO2022209844A1 (en) | 2022-10-06 |
| KR20230162070A (en) | 2023-11-28 |
| US20240124197A1 (en) | 2024-04-18 |
| JP2022153878A (en) | 2022-10-13 |
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| Publication | Publication Date | Title |
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