GB2553127A - Multi-fit cap - Google Patents
Multi-fit cap Download PDFInfo
- Publication number
- GB2553127A GB2553127A GB1614446.1A GB201614446A GB2553127A GB 2553127 A GB2553127 A GB 2553127A GB 201614446 A GB201614446 A GB 201614446A GB 2553127 A GB2553127 A GB 2553127A
- Authority
- GB
- United Kingdom
- Prior art keywords
- region
- screw cap
- thread
- female thread
- cap according
- 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.)
- Withdrawn
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
- B65D41/0407—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
- 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
- B65D41/0414—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a plug, collar, flange, rib or the like contacting the internal surface of a container neck
- B65D41/0421—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a plug, collar, flange, rib or the like contacting the internal surface of a container neck and combined with integral sealing means contacting other surfaces 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
-
- 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
- B65D41/0435—Threaded or like caps or cap-like covers secured by rotation with separate sealing elements
- B65D41/0442—Collars or rings
-
- 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
-
- 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
- B65D2251/00—Details relating to container closures
- B65D2251/08—Closures specially adapted for closing container mouths of differing size or configuration, e.g. screw/snap combination
Abstract
A screw cap comprising: an outer body with cylindrical outer wall 204 closed by circular lid 206; an interior neck seal; and a female inner thread 208, where an attachment region 212 of the thread permits deflection of the thread. Preferably, region of attachments comprises narrow region 10-50% of the thickness of the thread. Preferably, thread comprises inclined region 214 of 10-65° extending away from region of attachment, and end portion 216 parallel to lid of the body, where length of end portion is 10-40% the depth of the threads. Preferably, cap is formed of moulded HDPE, LDPE, polyamide or polyacetal.
Description
(54) Title of the Invention: Multi-fit cap
Abstract Title: Screw cap with deflecting female thread (57) A screw cap comprising: an outer body with cylindrical outer wall 204 closed by circular lid 206; an interior neck seal; and a female inner thread 208, where an attachment region 212 of the thread permits deflection of the thread. Preferably, region of attachments comprises narrow region 10-50% of the thickness of the thread. Preferably, thread comprises inclined region 214 of 10-65° extending away from region of attachment, and end portion 216 parallel to lid of the body, where length of end portion is 10-40% the depth of the threads. Preferably, cap is formed of moulded HDPE, LDPE, polyamide or polyacetal.
s
MM
R 0:,40
MULTI-FIT CAP
Technical field
This invention relates to screw caps for sealing plastic containers.
Background
Plastic jug bottles are used for the transportation of a variety of liquids, both hazardous and non-hazardous. Such bottles are available in a range of capacities, typically from 1 litre to 20 litres.
Plastic jug bottles are typically sealed by screw caps. A female thread inside the cap engages with a male thread around the neck of the bottle to tighten the cap onto the bottle neck. The mouth of the bottle presses against a layer of sealing material or a neck seal within the cap as it is tightened, sealing the contents of the bottle. A close fit between the male and female threads helps to ensure the cap can be sufficiently tightened to create a secure seal and prevent leaking. A tight seal is particularly important for bottles containing hazardous products.
The diameters of the bottle neck and the male thread of standard plastic jug bottles can vary by up to 5% of their nominal diameters between different manufacturers. This variation in dimensions can have a detrimental effect on the engagement of the male thread of the bottle with the female thread of the cap, preventing the cap from tightening properly and compromising the integrity of the seal when closed. Bottles from one manufacturer therefore have to be matched with caps from a designated manufacturer to ensure proper engagement of the threads.
The present invention seeks to provide a solution for allowing one cap of nominal size to fit a variety of container necks.
Summary of invention
According to the present invention, there is provided a screw cap for sealing a container with a threaded neck, the screw cap comprising: an outer body, comprising a cylindrical outer wall closed at one end by a circular lid and an interior neck seal; and a female thread around the inner surface of the cylindrical outer wall, wherein the female thread comprises a region of attachment to the inner surface configured to permit deflection of the female thread.
The screw cap may be formed of a moulded polymer material. The moulded polymer material may comprise one or more of the following: high density polyethylene (HDPE), low density polyethylene (LDPE), polyacetal, polyamide, or any suitable rigid polymer.. Preferably, the moulded polymer material is HDPE or nylon.
The outer body of the cap, the female thread and the neck seal may be formed of different polymers, where necessary to achieve the desired physical characteristics of each component. For example, the outer body may be formed of a more rigid material, whereas the female thread may be formed of a more flexible material.
The neck seal is preferably formed of a softer material than the outer body. In some embodiments, the neck seal may consist of a thin layer of material, such as a polytetrafluoroethylene (PTFE) liner.
The region of attachment may comprise a narrow region having a thickness that is less than the thickness of the female thread. The reduction in thickness of the narrow region may be between 10% and 50%, or preferably between 20% and 40% or more preferably between 25% and 33% of the thickness of the female thread. The depth of the narrow region may be more than 5% and no more than 33%, or preferably no more than 20 %, of the depth of the female thread, or more preferably is between 10% and 15% of the depth of the female thread.
The female thread may comprise an inclined region that extends from the region of attachment in a direction away from the lid of the outer body. The inclined region may extend from the region of attachment at an angle between 10° and 65°, or preferably between 20° and 55° or more preferably between 30° and 45°.
The female thread may further comprise an end portion that extends from the inclined region at an angle, such that the end portion is parallel to the lid of the outer body. The length of the end portion may be between 10% and 40%, or preferably between 25% and 33% of the thread depth.
It is an advantage that the deflectable female thread allows the cap to be fully tightened onto the neck of a container (e.g. a jug or bottle) ensuring a reliable seal even when there is not an accurate fit with the size of the male thread on the neck,. Deflection of the female thread as it interconnects with the male thread of the container neck permits the angle of the end portion to align with and fully engage between the ridges of the male thread, without requiring accurate matching of the cap to the dimensions of E and T, ensuring a tight seal when the cap is completely closed.
The moulded polymer material may be selected based on a number of characteristics, such as: elasticity, which permits the thread to deflect while in engagement with the bottle neck but return to its original configuration when removed from engagement; rigidity and durability, to prevent deformation or breakage; and compatibility with the contents of the container which the cap is intended to seal.
In some embodiments, the moulded polymer material may be selected to work in conjunction with the narrow region to permit deflection of the thread while also preventing breakage. The narrow region may be subjected to a significant amount of strain when the cap is screwed onto the bottle neck, due to a combination of deflection and rotational force. The polymer must therefore be resilient and durable to withstand this strain, but also flexible enough to allow the thread to deflect and perform its function. HDPE or polyamide may exhibit suitable resilience and flexibility for this purpose.
Brief description of the drawings
Figure 1 is a side perspective view of a typical jug bottle neck.
Figure 2a is an external side view of a screw cap according to an embodiment of the present invention, in engagement with a bottle neck.
Figure 2b is a schematic cross-sectional view through section A—A of Figure 2a.
Figure 3 is a schematic cross-sectional representation of the thread area of a screw cap according to an embodiment of the present invention, in engagement with a bottle neck.
Figure 4 is a detail of a cross-section of the thread area of the screw cap of Figure 3, showing exemplary dimensions.
Detailed description
Figure 1 shows a typical jug bottle neck 100 of diameter E. The neck has a male thread 102 of diameter T. Diameters E and T can vary by up to 5% of their nominal dimensions depending on the manufacturer.
Figure 2a shows a screw cap 200 according to an embodiment of the present invention, in engagement with a bottle neck 100 such as the one shown in Figure 1.
Figure 2b shows a cross-sectional view through section A—A of Figure 2a. The screw cap 200 comprises an outer body, which comprises a cylindrical outer wall 204 closed at one end by a circular top or lid 206, and a female thread 208 around an inner surface 210 of the cylindrical outer wall 204. The screw cap 200 may be formed of HDPE. The female thread 208 is shown in engagement with the male thread 102 of the bottle neck 100.
The female thread 208 is attached to the inner surface 210 at a region of attachment 212. The thread 208 comprises an inclined region 214, extending downwards from the region of attachment 212 (i.e. away from the lid of the cap 206), and an end portion 216, extending from the inclined region 214 at the opposite end to the region of attachment 212. The end portion 216 extends from the inclined region 214 at an angle, so that it is approximately parallel with the lid of the cap 206.
The region of attachment allows the thread 208 to deflect as it interconnects with the male thread 102 of the bottle neck 100. This permits the angle of the end portion 216 to align with and fully engage between the ridges of the male thread 102, without requiring accurate matching of the cap to the dimensions of E and T (see Figure 1), ensuring a secure seal when the cap 200 is completely closed.
The cap 200 is fully tightened so that the mouth of the bottle 218 is completely sealed against the neck seal 220.
Figure 3 shows a cross-sectional representation of the screw cap 200 according to an embodiment of the present invention, zoomed in on the threads 208, 102. The region of attachment 212 has a narrow region of reduced thickness relative to the rest of the female thread 208 and acts like a hinge, allowing the thread 208 to deflect when in engagement with the male thread 102. The thickness of the narrow region is 10% of the thickness of the rest of the female thread 208.
Figure 4 shows a detail of the cross-section of the female thread of the screw cap 200, with typical dimensions in millimetres for an example thread. It will be appreciated that these dimensions are shown for illustrative purposes only. Screw caps of different sizes, formed of different materials, or suitable for different applications, may have dimensions that vary considerably from those shown. As shown, the thread 214 extends at an angle from the inner surface of the outer wall 204 to a distance (thread depth) of 6.0mm and has a thickness of 1.25mm. The reduced thickness portion 212 has a thickness of 0.87mm (a reduction in thickness of about 30%) and extends 0.8mm (about 13.3% of the thread depth). The end portion 216 has a length of 1.8mm (about 30% of the thread depth). Also as shown 0.5mm radius fillets are provided where the thread 214 joins the inner wall of the outer 204 as well as other radiuses on the outer form of the thread.
Claims (11)
1. A screw cap for sealing a container with a threaded neck, the screw cap comprising:
an outer body, comprising:
a cylindrical outer wall closed at one end by a circular lid; an interior neck seal; and a female thread around the inner surface of the cylindrical outer wall, wherein the female thread comprises a region of attachment to the inner surface configured to permit deflection of the female thread.
2. A screw cap according to claim 1, formed of a moulded polymer material.
3. A screw cap according to claim 2, wherein the moulded polymer material is selected from one or more of the group consisting of: HDPE, LDPE, polyamide or polyacetal.
4. A screw cap according to any one of the preceding claims, wherein the region of attachment comprises a narrow region having a thickness that is less than the thickness of the female thread.
5. A screw cap according to claim 4, wherein the reduction in the thickness of the narrow region is between 10% and 50%, or preferably between 20% and 40%, or more preferably between 25% and 33% of the thickness of the female thread.
6. A screw cap according to claim 4 or claim 5, wherein the depth of the narrow region is more than 5% and no more than 33%, or preferably no more than 20 %, of the depth of the female thread, or more preferably is between 10% and 15% of the depth of the female thread.
7. A screw cap according to any one of the preceding claims, wherein the female thread comprises an inclined region that extends from the region of attachment in a direction away from the lid of the outer body.
8. A screw cap according to claim 7, wherein the inclined region extends from the region of attachment at an angle of between 10° and 65° or preferably between 20° and 55° or more preferably between 30° and 45°.
5
9. A screw cap according to claim 7 or claim 8, wherein the female thread further comprises an end portion that extends from the inclined region at an angle, such that the end portion is substantially parallel to the lid of the outer body.
10. A screw cap according to claim 9, wherein the length of the end portion is
10 between 10% and 40%, or preferably between 25% and 33% of the thread depth.
11. A screw cap substantially as hereinbefore described with reference o the accompanying drawings.
Intellectual
Property
Office
Application No: GB 1614446.1
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1614446.1A GB2553127A (en) | 2016-08-24 | 2016-08-24 | Multi-fit cap |
ES17187214T ES2717007T3 (en) | 2016-08-24 | 2017-08-22 | Screw cap presenting a self-adapting female thread |
EP17187214.6A EP3287386B1 (en) | 2016-08-24 | 2017-08-22 | Screw cap having a self-adapting female thread |
US15/683,081 US20180057221A1 (en) | 2016-08-24 | 2017-08-22 | Multi-fit cap |
AU2017219006A AU2017219006B2 (en) | 2016-08-24 | 2017-08-23 | Multi-fit cap |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1614446.1A GB2553127A (en) | 2016-08-24 | 2016-08-24 | Multi-fit cap |
Publications (2)
Publication Number | Publication Date |
---|---|
GB201614446D0 GB201614446D0 (en) | 2016-10-05 |
GB2553127A true GB2553127A (en) | 2018-02-28 |
Family
ID=57045591
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1614446.1A Withdrawn GB2553127A (en) | 2016-08-24 | 2016-08-24 | Multi-fit cap |
Country Status (5)
Country | Link |
---|---|
US (1) | US20180057221A1 (en) |
EP (1) | EP3287386B1 (en) |
AU (1) | AU2017219006B2 (en) |
ES (1) | ES2717007T3 (en) |
GB (1) | GB2553127A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD855707S1 (en) * | 2016-12-19 | 2019-08-06 | Jakobi International Limited | Connector |
CN110371470A (en) * | 2019-08-06 | 2019-10-25 | 福建省德化县宏顺发陶瓷工艺有限公司 | A kind of arc stretching hermetically sealed can |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1544854A (en) * | 1976-11-25 | 1979-04-25 | Ump Plastics Ltd | Closure cap |
US4325487A (en) * | 1980-06-02 | 1982-04-20 | Libit Sidney M | Sealing and locking thread system |
FR2565939A1 (en) * | 1984-06-13 | 1985-12-20 | Z P France | Screw-type stopper element |
GB2339771A (en) * | 1998-07-18 | 2000-02-09 | Rexam Containers Ltd | Closure and container neck combination with deformable screw thread |
EP0988235A1 (en) * | 1997-06-13 | 2000-03-29 | HERBST, Richard | Screw connection, method for closing a container and method and device for plastic body injection molding |
US20060043106A1 (en) * | 2004-08-26 | 2006-03-02 | Susan Pottish | Apparatus and method for reusable, no-waste collapsible tube dispensers |
KR20120054673A (en) * | 2010-11-20 | 2012-05-31 | 이정민 | Receiving device combined with container neck |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3069040A (en) * | 1961-08-15 | 1962-12-18 | Drackett Co | Container closure |
US3620400A (en) * | 1970-05-06 | 1971-11-16 | Braun Co W | Closures for bottles and the like |
JPS59501203A (en) * | 1982-07-09 | 1984-07-12 | メタル・クロ−ジュア−ズ・グル−プ・ピ−エルシ− | Improvement of lids for containers with screws |
US4553567A (en) * | 1984-04-30 | 1985-11-19 | Telander Lee W | Pipe thread protector |
US5038829A (en) * | 1988-10-14 | 1991-08-13 | Paul Panella | Sewer line clean out units |
US5271517A (en) * | 1992-06-12 | 1993-12-21 | The Pillsbury Company | Tamper evident lid |
DE9321374U1 (en) * | 1993-11-25 | 1997-07-24 | Aptargroup Sa | Sealing cap |
DE19727723A1 (en) * | 1997-06-13 | 1998-12-24 | Richard Herbst | Screw connection, method for closing a container and method and device for injection molding a plastic body |
JP3990807B2 (en) * | 1998-04-07 | 2007-10-17 | 日本クラウンコルク株式会社 | Plastic cap |
US6854616B2 (en) * | 2002-04-30 | 2005-02-15 | Alliance Plastics | Protective valve cap |
WO2011062432A2 (en) * | 2009-11-17 | 2011-05-26 | Lee Jeong-Min | Connection die coupled with container neck in use |
ES2421212B1 (en) * | 2013-02-21 | 2014-04-28 | Bericap, S.A. | Plastic plugs |
-
2016
- 2016-08-24 GB GB1614446.1A patent/GB2553127A/en not_active Withdrawn
-
2017
- 2017-08-22 EP EP17187214.6A patent/EP3287386B1/en not_active Not-in-force
- 2017-08-22 ES ES17187214T patent/ES2717007T3/en active Active
- 2017-08-22 US US15/683,081 patent/US20180057221A1/en not_active Abandoned
- 2017-08-23 AU AU2017219006A patent/AU2017219006B2/en not_active Ceased
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1544854A (en) * | 1976-11-25 | 1979-04-25 | Ump Plastics Ltd | Closure cap |
US4325487A (en) * | 1980-06-02 | 1982-04-20 | Libit Sidney M | Sealing and locking thread system |
FR2565939A1 (en) * | 1984-06-13 | 1985-12-20 | Z P France | Screw-type stopper element |
EP0988235A1 (en) * | 1997-06-13 | 2000-03-29 | HERBST, Richard | Screw connection, method for closing a container and method and device for plastic body injection molding |
GB2339771A (en) * | 1998-07-18 | 2000-02-09 | Rexam Containers Ltd | Closure and container neck combination with deformable screw thread |
US20060043106A1 (en) * | 2004-08-26 | 2006-03-02 | Susan Pottish | Apparatus and method for reusable, no-waste collapsible tube dispensers |
KR20120054673A (en) * | 2010-11-20 | 2012-05-31 | 이정민 | Receiving device combined with container neck |
Also Published As
Publication number | Publication date |
---|---|
GB201614446D0 (en) | 2016-10-05 |
EP3287386B1 (en) | 2019-01-02 |
EP3287386A1 (en) | 2018-02-28 |
AU2017219006B2 (en) | 2018-11-08 |
ES2717007T3 (en) | 2019-06-18 |
US20180057221A1 (en) | 2018-03-01 |
AU2017219006A1 (en) | 2018-03-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |