GB2035972A - Closure cap and container - Google Patents

Closure cap and container Download PDF

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Publication number
GB2035972A
GB2035972A GB7937505A GB7937505A GB2035972A GB 2035972 A GB2035972 A GB 2035972A GB 7937505 A GB7937505 A GB 7937505A GB 7937505 A GB7937505 A GB 7937505A GB 2035972 A GB2035972 A GB 2035972A
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GB
Grant status
Application
Patent type
Prior art keywords
container
screw thread
cap
ridges
indentations
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.)
Granted
Application number
GB7937505A
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GB2035972B (en )
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PANO CAP Ltd
Original Assignee
Pano Cap Ltd
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

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D41/00Caps, 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
    • B65D41/02Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0471Threaded 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

Abstract

Closure caps screwed onto containers are known to back-off or unscrew when subjected to vibration and general movement during transit and handling. To alleviate this problem, the screw threads 14,22 of a cap 2 and container 4, respectively, each have sufficient alternate ridges 16,27 and indentations 18,28 over at least part of their length so that when the cap 2 and container 4 are in a closed position at least one ridge on one screw thread can engage an indentation on the other screw thread. <IMAGE>

Description

SPECIFICATION Closure cap and container This invention relates to a closure cap, a container and to a closure cap and corresponding container in combination.

It is known to have closure caps and corresponding containers having continuous or intermittent screw threads to engage each other when the cap and the container are in a closed position. However, after the container has been filled with product and the cap has been affixed, the containers are shipped to various wholesale and retail outlets and are subjected to vibration during transit and handling. This vibration and general movement sometimes causes the cap to back-off from the container, thereby subjecting the product to the risk of contamination, or the inner parts of the container become soiled and the product becomes unsaleable.

This invention relates to a closure cap for use in combination with a corresponding container having a neck surrounding an opening with said neck having a screw thread on its outer surface.

The cap has a central portion and a periphery with a flange extending from the periphery for contacting the container, said flange having a screw thread on its inner surface. The screw threads each have sufficient alternate ridges and indentations over at least part of their length so that when the cap and container are in a closed position at least one ridge on one screw thread can engage an indentation on the other screw thread.

This invention further relates to a closure cap and corresponding container in combination wherein said cap has a central portion and a periphery, with a flange extending from the periphery for contacting the container, said flange having a screw thread on its inner surface. The container having a neck surrounding an opening, with a screw thread on the outer surface of said neck. The screw threads of the cap and container each having sufficient alternate ridges and indentations over at least part of their length so that when the cap and container are in a closed position at least one ridge of one screw thread can engage an indentation of the other screw thread.

This invention further relates to a container for use in combination with a correspondong cap having a central portion and a periphery with a flange extending from the periphery for contacting said container said flange having a screw thread on its inner surface, said container comprising a neck surrounding an opening, with said neck having a screw thread on its outer surface, said screw threads each having sufficient alternate ridges and indentations over at least part of their length, so that when the cap and container are in a closed position, at least one ridge on one screw thread can engage an indentation on the other screw thread.

Preferably, the closure cap is made of plastic and the container is made of glass or injected or blow-molded plastic. Polypropylene is an example of a type of plastic that can be used. Other suitable materials for the cap or container will become readily apparent to those skilled in the art. The screw threads of the cap and container of the present invention may be continuous or intermittent so long as the ridges and indentations are located over a sufficient portion of the length of the screw thread so that at least one ridge on one screw thread can engage an indentation on the other screw thread when the cap and container are in a closed position. It is possible to have an intermittent screw thread on the cap and a continuous screw thread on the container or vice versa or a suitable combination thereof.It is possible to have only one ridge on one screw thread and only one indentation on the other screw thread so long as the one ridge can engage the one indentation when the cap and container are in a closed position.

In the accompanying drawings, which illustrate an embodiment of the invention: Figure 1 is a partial perspective view of a cap and container of the present invention in an open position with the cap located above the container; Figure 2 is a partial cross-sectional view of the cap and the container in a closed position with a ridge of the cap engaged in an indentation of the container; Figure 3 is a partial cross-sectional view of the cap and the container in a closed position with a ridge of the container engaged in an indentation of the cap; Figure 4 is a partial perspective view of ridges and indentations in the screw threads of both the cap and container; Figure 5 is a side view of the ridges and indentations of Figure 4; Figure 6 is a partial perspective view of a variation in the type of indentation and fridge;; Figure 7 is a side view of the ridges and indentations of Figure 6; Figure 8 is a magnified schematic partial sectional view of a ridge of the container engaged in an indentation of the cap; Figure 9 is a magnified schematic partial sectional view of a ridge of the cap engaged in an indentation of the container.

Referring to the drawings in greater detail, in Figure 1, a closure cap 2 is located immediately above a corresponding container 4. The closure cap 2 has a central portion 6 and a periphery 8 with a flange 10 extending from the periphery. On the inner surface 12 of the flange 10, there is located a continuous screw thread 14 (only part of which is shown). The screw thread 1 4 has a series of alternate ridges 1 6 and indentations 1 8 located over its length. The series of ridges 1 6 and indentations 1 8 could be intermittent rather than continuous over the screw thread or there could be one series located over only a part of the screw thread.

The container 4 has a neck 20 with a continuous screw thread 22 located on an outer surface 24 of the neck 20. The screw thread 22 corresponds to the screw thread 1 4 but contains two groups 26 (only one of which is shown), of rages and indentations each having three ridges 27 and two adjacent indentations 28. the two groups 26 are located on the screw thread 22 approximately 1 80 degrees apart from one another. The ridges 1 6 and indentations 1 8 are located on the upper portion of the screw thread 14 and the ridges 27 and indentations 28 being located on the lower portion of the screw thread 22.When the cap 2 is placed over the neck 20 of the container 4 and the cap 2 is rotated to a closed position relative to the container 4, the indentations 1 8 of the cap 2 are engaged by the ridges 27 of the container 4 and the ridges 1 6 of the cap 2 can engage the indentations 28 of the container 4.

The ridges 1 6 and the cap 2 have a width approximately equal to the width of the indentations 1 8. Similarly, the ridges 27 of the container 4 have a width approximately equal to the width of the indentations 28. Also, the ridges 1 6 and indentations 1 8 of the cap 2 have a width approximately equal to that of the ridges 27 and indentations 28 of the container 4. Preferably, the screw thread of the cap has a continuous series of indentations and ridges over its length while the screw thread of the container has only two groups of indentations and ridges, each having three ridges and two adjacent indentations. The two groups are preferably spaced approximately 180 degrees apart from one another. The series of indentations and ridges on the screw thread of the cap could be intermittent or continuous.The series of indentations and ridges on the screw thread of the container could likwise be intermittent or continuous. So long. as there are a sufficient number of alternate indentations and ridges on each of the screw threads of the cap and container so that, when the cap is in a closed position, at least one ridge on one screw thread can engage an indentation on the other screw thread, any combination of intermittent or continuous series of ridges and indentations can be used. Also, the screw threads themselves could be intermittent or continuous.

Thus, once the cap 2 and the container 4 are in a closed position, the cap 2 will not back off or move any appreciable peripheral distance relative to the container 4 when the cap and container are vibrated during transit and handling.

In Figure 2, the cap 2 is shown in a closed position on the container 4 with a ridge 30 of the screw thread 14 engaged in an indentation 32 of the screw thread 22. A ridge 34 on the lower part of the screw thread 14 rests against the screw thread 22. There are no ridges or indentations on the screw thread 22 near the ridge 34 as there are only two groups of indentations and ridges on the screw thread 22 as described above for Figure 1.

In Figure 3, the cap is shown in a closed position on the container 4 with a ridge 36 on the screw thread 22 of the container 4 engaged in an indentation 38 on the screw thread 14 of the cap 2. In both Figures 2 and 3, the ridges and indentations are shown out of actual contact for use of illustration.

It is possible when the cap is closed on the container 4 that the ridges on the screw thread of the cap will engage the ridges on the screw thread of the container. In addition, the indentations on the cap and container will be located immediately opposite to one another. While this position is not desirable, it will occur, particularly when the cap is tightened onto the container by machine. When this occurs, the cap may back-off slightly relative to the container as the result of vibrations during transit or otherwise to the point where the ridges 1 6 of the cap 2 engage the indentations 28 of the container 4 and vice-versa.As the ridges are immediately adjacent to the indentations on each of the screw threads 14, 22, the cap 2 will move only half the distance between consecutive ridges 16 of the screw thread 14 before the ridges 1 6 are properly engaged with the indentations 28.

Generally, the backing off movement will be so miniscule that a safe seal will still be maintained and no contamination or spoiling of the product located within the container will result. The degree of tightness of the cap on the container can be controlled and regulated by the amountoftorque applied by the capping machine.

Of course, sometimes the cap will engage the container in a closed position where the ridges of the cap and container engage one another but are not directly opposite. This will also result in a slight backing-off of the cap relative to the container to the point where the ridges engage the immediately adjacent indentations. Again, this slight backing-off should not result in any contamination or spoiling of any product located within the container.

In Figures 4 and 5, there are shown screw threads 40, 42 of a cap and container respectively (not shown). Indentations 44,46 and ridges 48, 50 of the cap and container respectively all have approximately equal widths. In Figure 4, the screw threads 40, 42 are in an open position. In Figure 5, they are in a closed position with some of the indentations 44 on the screw thread 40 of the cap engaged by the ridges 50 on the screw thread 42 of the container and the indentations 46 on the screw thread 42 of the container are engaged by the ridges 48 on the screw thread 40 of the cap, The indentations 44, 46, as shown in Figures 4 and 5, are created by the formation of the ridges 48, 50. In other words, the indentations 44, 46 are created by "adding" the ridges 48, 50 to the screw threads 40, 42 rather than by "cutting" into the screw threads 40, 42. There is no "addition" or "cutting" made to the screw threads 40, 42 to create the indentations 44, 46. The cross-sections of the screw threads 40, 42 through the indentations 44, 46 are the same as the crosssections of these screw threads before the ridges 48, 50 are "added". Of course, the ridges could be created in a similar manner by cutting indentations into appropriate screw threads. Or, the ridges and indentations could be created partially by cutting into appropriate screw threads and partially by adding on to appropriate screw threads. The manner of creating the indentations and ridges will be readily apparent to those skilled in the art.

Returning to Figures 2 and 3, the cross-section of the screw thread 22 as shown in Figure 2 is the same as that of a standard screw thread without ridges or indentations. Similarly, the cross-section of the screw thread 14 as shown in Figure 3 is the same as that of a standard screw thread without ridges or indentations. In Figure 3, the crosssection of a lower portion 51 of the screw thread 22 is the same as that of a standard screw thread as there is no ridge at this point on the screw thread 22.

In Figures 6 and 7, there are shown screw threads 52, 54 of a cap and container respectively.

The Figures show a variation in the shape of indentations 56, 57 and ridges 60, 62 on the screw threads 52, 54 of the cap and container respectively. The ridges and indentations of the cap and container are mirror images of one another and are shown slightly apart in Figure 7 for ease of illustration.

Referring to Figure 8 in greater detail, a ridge 36 on a screw thread 22 of a container 4 is shown engaged in an indentation 38 of a screw thread 14 of a cap 2. There is also shown, by means of a dotted line, the cross-sectional shape of an indentation 32 immediately behind and adjacent to the ridge 36. The cross-section of the screw thread 14 as shown in Figure 8 is the same as that of a standard screw thread for a plastic cap.

Referring to Figure 9 in greater detail, there is shown a ridge 30 on a screw thread 14 of a cap 2 engaged in an indentation 32 on a screw thread 22 of a container 4. There is also shown by means of a dotted line, an indentation 38 immediately behind and adjacent to the ridge 30 on the screw thread 14. The cross-section of the screw thread 22 is the standard cross-section for screw threads of plastic or glass containers.

The results of the present invention can be achieved with ridges and indentations of various sizes and shapes. It was found that satisfactory results would be obtained for container diameters ranging from 1 8 millimetres to 1 32 millimetres by having ridges on the cap and containers with a depth of 0.3 millimetres, at their centre, the ridges being arcuate in cross-section and the distance between adjacent ridges being 2.5 millimetres.

The depth of the ridge 30 on the screw thread 1 4 of the cap 2 as shown in Figure 9 increases beyond 0.3 millimetres as it is tapered at an angle of 45 degrees relative to the inner surface 64 of the flange 66. This tapered portion allows the cap 2 to be stripped from a mold during manufacture without damaging the ridges or screw thread.

One advantage of the present invention is that a cap having a screw thread containing indentations and ridges can be used efficiently with a container having a normal screw thread without indentations and ridges and vice-versa.

Thus, caps on containers made in accordance with this invention are interchangeable with caps on containers having normal screw threads without indentations or ridges.

Claims (14)

1. A closure cap for use in combination with a corresponding container having a neck surrounding an opening with said neck having a screw thread on its outer surface, said cap comprising a central portion and a periphery with a flange extending from the periphery for contacting the container, said flange having a screw thread on its inner surface, said screw threads each having sufficient alternate ridges and indentations over at least part of their length, so that when the cap and container are in a closed position, at least one ridge on one screw thread can engage an indentation on the other screw thread.
2. A closure cap as claimed in Claim 1 wherein the screw thread of the cap has a series of alternate ridges and indentations over its length.
3. A closure cap as claimed in Claim 1 wherein the ridges and indentations along the screw thread of the cap are intermittent.
4. A closure cap as claimed in Claims 1, 2 or 3 wherein the ridges have a width of approximately equal to the width of the indentations.
5. A closure cap as claimed in Claims 1, 2 or 3 wherein the screw thread of the cap has one ridge.
6. A closure cap as claimed in Claims 1,2 or 3 wherein the screw thread of the cap has one indentation.
7. A closure cap and corresponding container in combination comprising a cap having a central portion and a periphery, with a flange extending from the periphery for contacting the container, said flange having a screw thread on its inner surface, and a container having a neck surrounding an opening, with a screw thread on the outer surface of said neck, the screw threads of the cap and container each having sufficient alternate ridges and indentations over at least part of their length so that when the cap and container are in a closed position at least one ridge of one screw thread can engage an indentation of the other screw thread.
8. A closure cap and corresponding container in combination as claimed in Claim 7 wherein both screw threads have a series of alternate ridges and indentations over their length and various ridges of one screw thread can engage various indentations of the other screw thread when the cap and container are in a closed position.
9. A closure cap and corresponding container in combination as claimed in Claim 8 wherein one screw thread has a series of ridges and indentations over its length and the ridges and indentations on the other screw thread are divided into two separate groups located approximately 180 degrees apart, each group having three ridges and two indentations.
10. A closure cap and corresponding container in combination as claimed in Claims 7, 8 or 9 wherein the ridges have a width approximately equal to the width of the indentations.
11. A closure cap and corresponding container in combination as claimed in Claim 9 wherein said one screw thread is that of the cap and said other screw thread is that of the container.
1 2. A closure cap and corresponding container in combination as claimed in Claim 7 wherein the screw thread of the cap has a series of ridges and indentations over at least part of its length and the screw thread of the container has one fridge.
13. A container for use in combination with a corresponding cap having a central portion and a periphery with a flange extending from the periphery for contacting said container said flange having a screw thread on its inner surface, said container comprising a neck surrounding an opening, with said neck having a screw thread on its outer surface, said screw threads each having sufficient alternate ridges and indentations over at least part of their length, so that when the cap and container are in a closed position, at least one ridge on one screw thread can engage an indentation on the other screw thread.
14. A closure cap or container substantially as hereinbefore described with reference to the accompanying drawings.
GB7937505A 1978-10-31 1979-10-30 Closure cap & container Expired GB2035972B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB7842697 1978-10-31
GB7937505A GB2035972B (en) 1978-10-31 1979-10-30 Closure cap & container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7937505A GB2035972B (en) 1978-10-31 1979-10-30 Closure cap & container

Publications (2)

Publication Number Publication Date
GB2035972A true true GB2035972A (en) 1980-06-25
GB2035972B GB2035972B (en) 1983-05-11

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GB7937505A Expired GB2035972B (en) 1978-10-31 1979-10-30 Closure cap & container

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494665A (en) * 1982-01-22 1985-01-22 Chanel Device for preventing the self-unscrewing of a cap from a container
GB2251240A (en) * 1990-12-24 1992-07-01 Northern Eng & Plastics Container and closure with co-operating threaded portions having fastening configurations
EP0542555A1 (en) * 1991-11-13 1993-05-19 Specialty Packaging Licensing Company, Inc. Container-closure assembly including a screw-cap having anti-backoff teeth on its threads
EP0580982A1 (en) * 1992-05-29 1994-02-02 The Gillette Company Plastic molded cap
WO1994013562A1 (en) * 1992-12-11 1994-06-23 Wiva Verpakkingen B.V. Cover for a waste container
WO1996004180A1 (en) * 1994-08-02 1996-02-15 The Coca-Cola Company Closure retained by cam action on a container for pressurized contents
WO1997031833A1 (en) * 1996-02-28 1997-09-04 Nunc A/S A combination comprising a container part and a closure part
GB2319513A (en) * 1996-11-21 1998-05-27 Able Ind Ltd Container and closure with safety threads
US9114911B2 (en) 2012-10-19 2015-08-25 Owens-Brockway Glass Container Inc. Container, handle for a container, and handle and container assembly
WO2015169415A1 (en) * 2014-05-09 2015-11-12 Saint-Gobain Oberland Ag Closing device for containers
US9776771B2 (en) 2013-11-26 2017-10-03 Eppendorf Ag Screw cap lidded container

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494665A (en) * 1982-01-22 1985-01-22 Chanel Device for preventing the self-unscrewing of a cap from a container
GB2251240A (en) * 1990-12-24 1992-07-01 Northern Eng & Plastics Container and closure with co-operating threaded portions having fastening configurations
GB2251240B (en) * 1990-12-24 1994-06-08 Northern Eng & Plastics Container and closure with co-operating threaded portions having fastening configurations
EP0542555A1 (en) * 1991-11-13 1993-05-19 Specialty Packaging Licensing Company, Inc. Container-closure assembly including a screw-cap having anti-backoff teeth on its threads
EP0580982A1 (en) * 1992-05-29 1994-02-02 The Gillette Company Plastic molded cap
WO1994013562A1 (en) * 1992-12-11 1994-06-23 Wiva Verpakkingen B.V. Cover for a waste container
US5634566A (en) * 1992-12-11 1997-06-03 Wiva Verpakkingen B.V. Cover for a waste container
WO1996004180A1 (en) * 1994-08-02 1996-02-15 The Coca-Cola Company Closure retained by cam action on a container for pressurized contents
WO1997031833A1 (en) * 1996-02-28 1997-09-04 Nunc A/S A combination comprising a container part and a closure part
US6085922A (en) * 1996-02-28 2000-07-11 Nunc, A/S Container and closure assembly with tactile indication of closure position
GB2319513A (en) * 1996-11-21 1998-05-27 Able Ind Ltd Container and closure with safety threads
US9114911B2 (en) 2012-10-19 2015-08-25 Owens-Brockway Glass Container Inc. Container, handle for a container, and handle and container assembly
US9884703B2 (en) 2012-10-19 2018-02-06 Owens-Brockway Glass Container Inc. Container, handle for a container, and handle and container assembly
US9776771B2 (en) 2013-11-26 2017-10-03 Eppendorf Ag Screw cap lidded container
WO2015169415A1 (en) * 2014-05-09 2015-11-12 Saint-Gobain Oberland Ag Closing device for containers

Also Published As

Publication number Publication date Type
GB2035972B (en) 1983-05-11 grant

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