US20050124057A1 - Two piece screw cap closure - Google Patents
Two piece screw cap closure Download PDFInfo
- Publication number
- US20050124057A1 US20050124057A1 US10/498,528 US49852805A US2005124057A1 US 20050124057 A1 US20050124057 A1 US 20050124057A1 US 49852805 A US49852805 A US 49852805A US 2005124057 A1 US2005124057 A1 US 2005124057A1
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- US
- United States
- Prior art keywords
- wall
- closure
- cap
- threads
- rim
- 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.)
- Abandoned
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D47/00—Closures with filling and discharging, or with discharging, devices
- B65D47/04—Closures with discharging devices other than pumps
- B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
- B65D47/10—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having frangible closures
- B65D47/103—Membranes with a tearing element
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D51/00—Closures not otherwise provided for
- B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
- B65D51/20—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2251/00—Details relating to container closures
- B65D2251/0003—Two or more closures
- B65D2251/0006—Upper closure
- B65D2251/0015—Upper closure of the 41-type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2251/00—Details relating to container closures
- B65D2251/0003—Two or more closures
- B65D2251/0068—Lower closure
- B65D2251/0087—Lower closure of the 47-type
Definitions
- This invention relates in general to two piece plastic threaded closures with removable body diaphragm for press fit installation on container openings with beaded rim.
- the invention relates to an improved low profile closure, which overlies a relatively tall container annular beaded rim.
- the invention relates to the position of the threads below the level of the container beaded rim for a lower closure profile on the container. The position of the cap threaded wall overlying the threaded body outer wall, braces the attachment of the closure to the container beaded rim for a strong mechanical attachment.
- One and two piece screw cap closures are commonly used to contain and dispense liquids from containers.
- Two piece closures commonly combine a body piece incorporating a threaded neck with an overlying threaded cap.
- the body piece typically has an annular recess or rim for attachment to the container, and may incorporate tamper evidence means such as a pull out diaphragm.
- the container or container cover is typically manufactured with an annular opening modified for subsequent attaching of the closure. Often the liquid contents are filled through the container opening, and the two piece closure is installed as part of the filling operation.
- Metal cans with a beaded rim for press fit of a two piece plastic closure is a common example.
- Cardboard dairy product containers with a thermally bonded plastic threaded closure is another recent example.
- One piece threaded plastic and metal screw caps remain the most common closures due to low cost.
- One piece threaded caps may be applied directly to the container wherever the container opening is manufactured with suitable mating threads.
- Plastic and glass bottles with either plastic or metal threaded caps are common examples.
- Cap liners and gaskets are often required to close the voids between the cap and container to achieve a satisfactory liquid tight seal. The success of the one piece screw cap closure to retain the product without leaking depends upon the correct dimensional tolerance of both the cap and container threads, proper installation torque, and the elimination of voids in the joint.
- Two piece closures are often preferred where the container opening thread dimensions vary due to manufacturing process variables, or where fabricating a threaded opening in the container is difficult. For example forming a threaded neck in metal containers is difficult due to the mechanical limitations of metal drawing.
- Plastic injection molded containers such as open head pails have molded threads which are subject to uneven post molding shrinkage leading to ovality of the threaded opening which can result in binding when threading the cap to the body.
- Plastic container manufacturing may be simplified by switching from a threaded opening to a simpler beaded rim, which results in savings in tooling and process scrap.
- Two piece threaded closures which combine ease of installation to the container with high performance and low cost are desirable.
- Threaded cap closures often incorporate a gasket or liner to close voids in the mechanical joint, and create a liquid tight seal between the container opening and the closure.
- Gaskets and liners add cost to the manufacture of closures, but allow for looser manufacturing tolerances by both the closure and container manufactured and assembled as a set generally allows for tighter tolerances and improved mechanical seal design.
- a body piece molded of relatively soft plastic aids in the establishing of a good seal between the relatively hard plastic of both the container and the closure cap, due to the spreading force of the relatively soft plastic between the hard plastic to fill in any voids.
- the improvements include the strong mechanical attachment and low profile of the closure which closely overlies a relatively tall container beaded rim.
- Prior art two piece threaded closures are common and typically comprise of a body portion incorporating a threaded neck for engagement with a removable threaded cap.
- the shape of the closures varies according to end use, the materials used and the method of attachment of the body piece to containers. Methods of attachment of the closure to the container include mechanical press fit, thermal bonding, adhesives and by other means.
- the closure cap is removable from the body at a later date for dispensing the product. Tamper evident features such as pull out diaphragms may be incorporated. Secure attachment is important for the performance of the container.
- U.S. Pat. No. 5,267,675 illustrates a two piece closure that has a body which is designed for press fit into the container. An overlying threaded cap is shown removed for the attachment of the paint dispenser.
- the closure body is a mechanical press fit inside an annular container opening. The body threads are above the plane where the closure attaches to the container. This design has the disadvantage of being exposed to side impact, with the closure being easily dislodged.
- U.S. Pat. No. 3,770,156 discloses the cross section of a container using a mechanical seal to replace traditional tubular rubber gaskets in plastic pails.
- the seal incorporates two flexible annular rings that are tapered to a flexible point.
- This design utilizes a seal between a semi-rigid plastic pail cover and similar plastic in the container body.
- This invention relates to two piece closures with a removable diaphragm, which are installed by mechanical press fit over a beaded rim.
- Metal containers typically have a circular opening punched in the cover area.
- the edge of the opening may be reinforced by forming an annular lip or bead in the metal.
- the metal bead may be used as an attachment for a mating recess in the plastic closure body.
- Prior art arrangements of two piece closures teach a closure body that is molded from a softer plastic relative to a harder plastic cup, due to the sealing ability of the softer plastic.
- the body-threaded neck is generally located in alignment with a body mating recess.
- the relatively harder plastic cap overlies the body threaded neck portion.
- the closure cap and body are typically pre-assembled by being threaded together.
- the closure is positioned so the body recess aligns with the container opening rim.
- the closure and container are forced together with the body recess and typically sized to expand over and securely grip the container rim.
- the container is now sealed for shipment.
- the threaded cap can later be easily removed and resealed by the end user.
- Limitations on this design are the relatively high profile of the closure above the container, which may be struck and dislodged during shipment. It is desirable to have a closure which has a low profile.
- a closure from Reike (trade name) on the other hand has a relatively low profile but the securing means does not extend much beyond the beaded rim.
- the body recess in such prior art arrangements are limited by the size of the beaded rim that can be formed in the metal. This limits the mechanical engagement and seal performance that can be achieved between the container and closure. It is desirable to increase the relative height of the opening rim and deepen the body recess for better attachment and seal performance. The taller opening rim can easily be achieved in the manufacture of plastic injection molded and blow molded containers.
- This invention relates to a two piece closure with a removable diaphragm, which is installed by mechanical press fit over a beaded rim.
- injection molded and blow plastic containers with relatively tall opening with beaded rims have been identified as suitable candidates forte improved two piece threaded closures.
- This invention relates in general to two piece plastic threaded closures with removable diaphragm for press fit installation on container openings with beaded rim. More specifically the invention relates to the attachment of the closure to the container beaded rim using both a relatively tall inner wall and outer skirt, the outer skirt incorporating the body thread. The invention also relates to the position of the threads below the level of the container beaded rim for a lower closure profile on the container. The position of the cap threaded wall overlying the threaded body skirt, braces the attachment of the closure to the container beaded rim for improved seal performance.
- FIG. 1 is a side and cross-sectional view of the two piece threaded closure before installation on a container cover.
- FIG. 2 is a side and cross-sectional view of the two piece threaded closure after installation on a container cover.
- FIG. 3 is a side and cross-sectional view of the closure body
- FIG. 4 is a top view of the closure body
- FIG. 5 is a side and cross-sectional view of the closure cap
- FIG. 6 is a top view of the closure cap
- FIG. 7 is a sectional view of a typical container cover opening
- FIG. 8 is a sectional view of an optional container opening with neck ring
- FIG. 9 is a partial enlarged cross-sectional view of the two piece threaded closure after installation on a container cover.
- FIG. 1 illustrates a two piece threaded closure 4 before installation on container cover 1 .
- the closure 4 generally comprises a closure body 5 made of soft flexible plastic (i.e. low density polyethylene (LDPE)) or the like, and a closure cap 16 , made of semi-rigid plastic (for example high density polyethylene (HDPE)) or the like.
- the body 5 and cap 16 are co-axially disposed about central axis 27 and secured in threaded assembly by body thread 12 and cap thread 21 .
- buttress threads nave been favorably used as shown providing a strong fit. Furthermore there is a small gap which in one example can be in the order of up to 0.100 of an inch between the outer lip of the buttress threads and the body outer wall 11 and top outer wall 20 respectively, which accommodates any ovality of the annular shape of the body outer wall 11 and cap outer wall 20 so as to facilitate the treading and unthreading of the closure cap 16 to closure body 5 , and minimize binding of the parts.
- buttress threads each present a relatively wide thread face 25 for strong threaded engagement therebetween. More specifically the body outer wall 11 presents buttress threads having a relatively wide lower face 25 ( a ) while the cap outer wall 20 prevents buttress threads having a relatively wide upper face 25 ( b ).
- closure body 5 is comprised of a body pull out diaphragm 6 attached to a diaphragm pull ring 7 .
- the diaphragm 6 is attached by an annular frangible web 13 to the annular body inner wall 8 .
- the inner wall 8 is generally cylindrical in shape and terminates in body inner rim 9 .
- a body top wall 10 beginning near body inner rim 9 extends generally radially outward from the body inner wall 8 , and leads to body outer wall 11 .
- Outer wall 11 is cylindrical in shape, and lies racially outside of body inner wall 8 .
- the inner wall 8 , top wall 10 , and body outer wall 11 together form an annular body recess 14 on one side of the body top wall 10 and an annular rim recess 15 so as to facilitate the treading and unthreading of the closure cap 16 to closure body 5 , and minimize binding of the pasts, sized to attach to the container cover 1 .
- FIG. 2 is a side and cross-sectional view of the two piece threaded closure after installation on container cover 1 .
- the container 1 presents a cover opening rim 2 having a generally upstanding peripheral edge with a rim bead 3 adapted to be received or captured by the annular rim recess 15 in a manner to be more fully described herein.
- the rim bead 3 is outwardly bulbous in one embodiment of the invention.
- the generally cylindrical inner wall 8 braces against cover opening rim 2 and body top wall 10 overlies rim bead 3 .
- the body outer wall 11 expands generally radially outwardly (i.e. the diameter expands) as rim bead 3 passes along body annular recess 14 and into the annual rim recess to be captured therein.
- the body outer wall 11 relaxes to a smaller diameter and underlies rim bead 3 .
- the cap outer wall 20 overlies and braces the body outer wall 11 against rim bead 3 to further resist removal of closure 4 from container cover 1 .
- FIG. 3 specifically shows the body inner rim 9 , body top wall 10 and body outer rim defining a notch or sealing recess 22 which is adapted to receive cap seal projection 18 when the cap 16 is threaded to the closure body 5 .
- the relatively soft plastic of body 5 “gives” and creates a substantially tight seal, which seals quickly, rather than gradually, and acts as a gasket.
- FIG. 4 is a top view of the closure body 5 .
- Pull ring 7 is used to remove pull out diaphragm 6 .
- FIG. 5 is a side and cross-sectional view of the closure cap 16 having top 17 .
- FIG. 6 is a top view of the closure cap 16 .
- a plurality of cap lugs 19 are used as finger grips to assist the installation and removal of cap 16 .
- Cap seal projection 18 is designed to engage with body inner rim 9 and body outer rim 26 to create a seal.
- FIG. 7 is a side and cross-sectional view of the opening in a typical container cover 1 .
- a cover opening rim 2 which is generally cylindrical in shape terminates in a rim bead 3 .
- FIG. 8 is a side and cross-sectional view of an optional container 3 with neck ring 2 and rim bead 3 .
- An annular container neck ring 24 may be used to support the container 23 during the installation of closure 4 .
- FIG. 9 is a detail side and cross-sectional view of the two piece threaded closure after installation on container cover 1 .
- the assembly shown creates a low profile closure, resisting dislodgment when accidentally struck. Moreover the seal and closure is stronger and more robust.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Abstract
A closure for attachment to a cover having an opening presenting an upstanding rim, comprising a body having an annular top wall, said top wall merging with spaced inner and outer walls defining a depending body recess for capturing said rim, said outer wall having threads extending generally outwardly therefrom and the top wall presenting a notch; a cap having a top, said top presenting a projection disposed for alignment with said notch, an outer wall depending from said top, said outer wall having threads for engagement with the threads of said body outer wall.
Description
- This invention relates in general to two piece plastic threaded closures with removable body diaphragm for press fit installation on container openings with beaded rim. The invention relates to an improved low profile closure, which overlies a relatively tall container annular beaded rim. The invention relates to the position of the threads below the level of the container beaded rim for a lower closure profile on the container. The position of the cap threaded wall overlying the threaded body outer wall, braces the attachment of the closure to the container beaded rim for a strong mechanical attachment.
- One and two piece screw cap closures are commonly used to contain and dispense liquids from containers. Two piece closures commonly combine a body piece incorporating a threaded neck with an overlying threaded cap. The body piece typically has an annular recess or rim for attachment to the container, and may incorporate tamper evidence means such as a pull out diaphragm. The container or container cover is typically manufactured with an annular opening modified for subsequent attaching of the closure. Often the liquid contents are filled through the container opening, and the two piece closure is installed as part of the filling operation. Metal cans with a beaded rim for press fit of a two piece plastic closure is a common example. Cardboard dairy product containers with a thermally bonded plastic threaded closure is another recent example.
- One piece threaded plastic and metal screw caps remain the most common closures due to low cost. One piece threaded caps may be applied directly to the container wherever the container opening is manufactured with suitable mating threads. Plastic and glass bottles with either plastic or metal threaded caps are common examples. Cap liners and gaskets are often required to close the voids between the cap and container to achieve a satisfactory liquid tight seal. The success of the one piece screw cap closure to retain the product without leaking depends upon the correct dimensional tolerance of both the cap and container threads, proper installation torque, and the elimination of voids in the joint.
- Two piece closures are often preferred where the container opening thread dimensions vary due to manufacturing process variables, or where fabricating a threaded opening in the container is difficult. For example forming a threaded neck in metal containers is difficult due to the mechanical limitations of metal drawing. Plastic injection molded containers such as open head pails have molded threads which are subject to uneven post molding shrinkage leading to ovality of the threaded opening which can result in binding when threading the cap to the body. Plastic container manufacturing may be simplified by switching from a threaded opening to a simpler beaded rim, which results in savings in tooling and process scrap. Two piece threaded closures which combine ease of installation to the container with high performance and low cost are desirable.
- One limitation of two piece threaded closures resides in the available height of the closure above the container surface where the cap must be sufficiently exposed to allow for easy gripping by hand for unthreading. If the cap is too high, it may be struck and dislodged during shipping and handling. A cap and body combination which has a low profile and strong attachment, but still allows for easy removal is desirable. Furthermore a two piece closure which incorporates a removable diaphragm in the body is a desirable tamper evident feature.
- Threaded cap closures often incorporate a gasket or liner to close voids in the mechanical joint, and create a liquid tight seal between the container opening and the closure. Gaskets and liners add cost to the manufacture of closures, but allow for looser manufacturing tolerances by both the closure and container manufactured and assembled as a set generally allows for tighter tolerances and improved mechanical seal design. A body piece molded of relatively soft plastic aids in the establishing of a good seal between the relatively hard plastic of both the container and the closure cap, due to the spreading force of the relatively soft plastic between the hard plastic to fill in any voids.
- It is an objective of this invention to provide an improved two piece threaded closure design for press fit installation on plastic containers with beaded rims. The improvements include the strong mechanical attachment and low profile of the closure which closely overlies a relatively tall container beaded rim.
- It is a further objective of this invention to provide an improved two piece threaded closure utilizing a tapered or “V” shaped mechanical seal which substantially eliminates the need for cap gaskets or liners.
- It is a further objective of this invention to provide an improved two piece threaded closure utilizing a mechanical seal between the closure cap and body which eliminates the need for cap gaskets or liners.
- Prior art two piece threaded closures are common and typically comprise of a body portion incorporating a threaded neck for engagement with a removable threaded cap. The shape of the closures varies according to end use, the materials used and the method of attachment of the body piece to containers. Methods of attachment of the closure to the container include mechanical press fit, thermal bonding, adhesives and by other means. The closure cap is removable from the body at a later date for dispensing the product. Tamper evident features such as pull out diaphragms may be incorporated. Secure attachment is important for the performance of the container.
- U.S. Pat. No. 5,267,675 illustrates a two piece closure that has a body which is designed for press fit into the container. An overlying threaded cap is shown removed for the attachment of the paint dispenser. The closure body is a mechanical press fit inside an annular container opening. The body threads are above the plane where the closure attaches to the container. This design has the disadvantage of being exposed to side impact, with the closure being easily dislodged.
- U.S. Pat. No. 3,770,156 discloses the cross section of a container using a mechanical seal to replace traditional tubular rubber gaskets in plastic pails. The seal incorporates two flexible annular rings that are tapered to a flexible point. This design utilizes a seal between a semi-rigid plastic pail cover and similar plastic in the container body. This invention relates to two piece closures with a removable diaphragm, which are installed by mechanical press fit over a beaded rim.
- Two piece plastic threaded closures, which are assembled to metal cans, are well known. Metal containers typically have a circular opening punched in the cover area. The edge of the opening may be reinforced by forming an annular lip or bead in the metal. The metal bead may be used as an attachment for a mating recess in the plastic closure body.
- Prior art arrangements of two piece closures teach a closure body that is molded from a softer plastic relative to a harder plastic cup, due to the sealing ability of the softer plastic. The body-threaded neck is generally located in alignment with a body mating recess. The relatively harder plastic cap overlies the body threaded neck portion. The closure cap and body are typically pre-assembled by being threaded together. During installation the closure is positioned so the body recess aligns with the container opening rim. The closure and container are forced together with the body recess and typically sized to expand over and securely grip the container rim. In this arrangement the container is now sealed for shipment. The threaded cap can later be easily removed and resealed by the end user. Limitations on this design are the relatively high profile of the closure above the container, which may be struck and dislodged during shipment. It is desirable to have a closure which has a low profile.
- A closure from Reike (trade name) on the other hand has a relatively low profile but the securing means does not extend much beyond the beaded rim.
- Other prior art devices are shown in De 42 40 485 C.
- Generally speaking the body recess in such prior art arrangements are limited by the size of the beaded rim that can be formed in the metal. This limits the mechanical engagement and seal performance that can be achieved between the container and closure. It is desirable to increase the relative height of the opening rim and deepen the body recess for better attachment and seal performance. The taller opening rim can easily be achieved in the manufacture of plastic injection molded and blow molded containers.
- This invention relates to a two piece closure with a removable diaphragm, which is installed by mechanical press fit over a beaded rim.
- In this invention, injection molded and blow plastic containers with relatively tall opening with beaded rims have been identified as suitable candidates forte improved two piece threaded closures.
- This invention relates in general to two piece plastic threaded closures with removable diaphragm for press fit installation on container openings with beaded rim. More specifically the invention relates to the attachment of the closure to the container beaded rim using both a relatively tall inner wall and outer skirt, the outer skirt incorporating the body thread. The invention also relates to the position of the threads below the level of the container beaded rim for a lower closure profile on the container. The position of the cap threaded wall overlying the threaded body skirt, braces the attachment of the closure to the container beaded rim for improved seal performance.
-
FIG. 1 is a side and cross-sectional view of the two piece threaded closure before installation on a container cover. -
FIG. 2 is a side and cross-sectional view of the two piece threaded closure after installation on a container cover. -
FIG. 3 is a side and cross-sectional view of the closure body -
FIG. 4 is a top view of the closure body -
FIG. 5 is a side and cross-sectional view of the closure cap -
FIG. 6 is a top view of the closure cap -
FIG. 7 is a sectional view of a typical container cover opening -
FIG. 8 is a sectional view of an optional container opening with neck ring -
FIG. 9 is a partial enlarged cross-sectional view of the two piece threaded closure after installation on a container cover. - Number Description
-
- 1 container cover
- 2 cover opening rim
- 3 rim bead
- 4 two piece threaded closure
- 5 closure body
- 6 body pull out diaphragm
- 7 diaphragm pull ring
- 8 body inner wall
- 9 body inner rim
- 10 body top wall
- 11 body outer wall
- 12 body thread
- 13 frangible web
- 14 annular body recess
- 15 annular rim recess
- 16 closure cap
- 17 cap top
- 18 cap seal projection
- 19 cap lugs
- 20 cap outer wall
- 21 cap thread
- 22 sealing recess
- 23 container
- 24 container neck ring
- 25 thread face
- 25(a) lower face
- 25(b) upper face
- 26 body outer rim
- 27 central axis
- Like parts shall be given like numbers throughout the figures.
-
FIG. 1 illustrates a two piece threadedclosure 4 before installation oncontainer cover 1. Theclosure 4 generally comprises aclosure body 5 made of soft flexible plastic (i.e. low density polyethylene (LDPE)) or the like, and aclosure cap 16, made of semi-rigid plastic (for example high density polyethylene (HDPE)) or the like. Thebody 5 and cap 16 are co-axially disposed aboutcentral axis 27 and secured in threaded assembly bybody thread 12 andcap thread 21. - A variety of thread types can be used in this invention. In one embodiment buttress threads nave been favorably used as shown providing a strong fit. Furthermore there is a small gap which in one example can be in the order of up to 0.100 of an inch between the outer lip of the buttress threads and the body
outer wall 11 and topouter wall 20 respectively, which accommodates any ovality of the annular shape of the bodyouter wall 11 and capouter wall 20 so as to facilitate the treading and unthreading of theclosure cap 16 toclosure body 5, and minimize binding of the parts. - Furthermore the buttress threads each present a relatively
wide thread face 25 for strong threaded engagement therebetween. More specifically the bodyouter wall 11 presents buttress threads having a relatively wide lower face 25(a) while the capouter wall 20 prevents buttress threads having a relatively wide upper face 25(b). - As is shown in greater detail in
FIG. 9 ,closure body 5 is comprised of a body pull outdiaphragm 6 attached to adiaphragm pull ring 7. Thediaphragm 6 is attached by an annularfrangible web 13 to the annular bodyinner wall 8. Theinner wall 8 is generally cylindrical in shape and terminates in bodyinner rim 9. Abody top wall 10 beginning near bodyinner rim 9 extends generally radially outward from the bodyinner wall 8, and leads to bodyouter wall 11.Outer wall 11 is cylindrical in shape, and lies racially outside of bodyinner wall 8. Theinner wall 8,top wall 10, and bodyouter wall 11, together form anannular body recess 14 on one side of thebody top wall 10 and anannular rim recess 15 so as to facilitate the treading and unthreading of theclosure cap 16 toclosure body 5, and minimize binding of the pasts, sized to attach to thecontainer cover 1. -
FIG. 2 is a side and cross-sectional view of the two piece threaded closure after installation oncontainer cover 1. Thecontainer 1 presents acover opening rim 2 having a generally upstanding peripheral edge with arim bead 3 adapted to be received or captured by theannular rim recess 15 in a manner to be more fully described herein. As shown inFIG. 2 therim bead 3 is outwardly bulbous in one embodiment of the invention. - As shown in greater detail in
FIG. 9 the generally cylindricalinner wall 8 braces againstcover opening rim 2 and bodytop wall 10 overlies rimbead 3. During installation, the bodyouter wall 11 expands generally radially outwardly (i.e. the diameter expands) asrim bead 3 passes along bodyannular recess 14 and into the annual rim recess to be captured therein. After installation, the bodyouter wall 11 relaxes to a smaller diameter and underliesrim bead 3. The capouter wall 20 overlies and braces the bodyouter wall 11 againstrim bead 3 to further resist removal ofclosure 4 fromcontainer cover 1. -
FIG. 3 specifically shows the bodyinner rim 9,body top wall 10 and body outer rim defining a notch or sealingrecess 22 which is adapted to receivecap seal projection 18 when thecap 16 is threaded to theclosure body 5. As thecap 17 is threaded to thebody 6 the relatively soft plastic ofbody 5 “gives” and creates a substantially tight seal, which seals quickly, rather than gradually, and acts as a gasket. -
FIG. 4 is a top view of theclosure body 5. Pullring 7 is used to remove pull outdiaphragm 6. -
FIG. 5 is a side and cross-sectional view of theclosure cap 16 havingtop 17. -
FIG. 6 is a top view of theclosure cap 16. A plurality of cap lugs 19 are used as finger grips to assist the installation and removal ofcap 16.Cap seal projection 18 is designed to engage with bodyinner rim 9 and bodyouter rim 26 to create a seal. -
FIG. 7 is a side and cross-sectional view of the opening in atypical container cover 1. Acover opening rim 2 which is generally cylindrical in shape terminates in arim bead 3. -
FIG. 8 is a side and cross-sectional view of anoptional container 3 withneck ring 2 andrim bead 3. An annularcontainer neck ring 24 may be used to support thecontainer 23 during the installation ofclosure 4. -
FIG. 9 is a detail side and cross-sectional view of the two piece threaded closure after installation oncontainer cover 1. - The assembly shown creates a low profile closure, resisting dislodgment when accidentally struck. Moreover the seal and closure is stronger and more robust.
- Various embodiments of the invention have now been described in detail.
- Since changes in and/or additions to the above-described best mode may be made without departing from the nature, or scope of the invention, the invention is not to be limited to said details.
Claims (11)
1. A closure (4) for attachment to a cover (1) having an opening presenting an upstanding rim (3) comprising:
(a) a body (5) having an annular recess (14, 15) formed between a spaced inner (18) and outer (11) annular wall, said recess (14, 15) adapted to capture said rim (3), said annular outer wall (11) having threads (12) extending generally outwardly therefrom;
(b) a cap (16) having a top wall (17), said top wall (17) presenting an outer wall (20) depending from said top wall (17), said cap outer wall (20) having threads (21) for engagement with said threads (12) of said body outer wall (11);
(c) said rim (3), body (5) and cap (16) co-axially disposed about an axis (27);
characterized in that:
(d) said threads (12) of said body outer wall (11) and said threads (21) of said cap outer wall (20) are both disposed at and below a horizontal plane defined by said rim (3).
2. A closure (4) as claimed in claim 1 wherein said body (5) presents only two annular walls comprising:
(a) said inner annular wall (8);
(b) said outer annular wall (11).
3. A closure (4) as claimed in claim 1 wherein said body (5) is voidless.
4. A closure (4) as claimed in claim 1 wherein:
(a) said body (5) has a top wall (10) presenting a notch (22);
(b) said cap presents a projection (18) disposed for alignment with said notch (22);
and wherein said rim (3), notch (22) and projection (18) are radially aligned.
5. A closure as claimed in claim 4 wherein said body top wall (10) contacts said rim (3) and said cap top (7) wall contacts said body top wall (10).
6. A closure (4) as claimed in claim 5 wherein said body threads (12) have a relatively wide lower face (25 a), and said cap threads (21) have a relatively wide upper face (25 b) for secure engagement between said cap (16) and body (25).
7. A closure (4) as claimed in claim 6 wherein said body outer wall threads (12) move radially annularly outwardly relative said cap threads (21) when said beaded rim (3) is pressed through said annular recess (14, 15).
8. A closure (4) as claimed in claim 7 wherein said notch (22) comprises an annular tapered notch adapted for sealing engagement with said cap projection (18) for maintaining sealing engagement.
9. A closure (4) as claimed in claim 8 wherein said body (5) comprises low density polyethylene and said cap comprises high density polyethylene.
10. A closure (4) as claimed in claim 8 wherein said lower face (25 a) and said upper face (25 b) are radially disposed and said body threads (12) are spaced from said cap outer wall (20).
11. A closure (4) as claimed in claim 10 wherein said threads 12 and 21 are not disposed above the horizontal plane defined by said rim (3).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/498,528 US20050124057A1 (en) | 2001-12-14 | 2002-12-12 | Two piece screw cap closure |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US33945701P | 2001-12-14 | 2001-12-14 | |
US60339457 | 2001-12-14 | ||
PCT/CA2002/001905 WO2003051737A2 (en) | 2001-12-14 | 2002-12-12 | Two piece screw cap closure |
US10/498,528 US20050124057A1 (en) | 2001-12-14 | 2002-12-12 | Two piece screw cap closure |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050124057A1 true US20050124057A1 (en) | 2005-06-09 |
Family
ID=23329073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/498,528 Abandoned US20050124057A1 (en) | 2001-12-14 | 2002-12-12 | Two piece screw cap closure |
Country Status (4)
Country | Link |
---|---|
US (1) | US20050124057A1 (en) |
AU (1) | AU2002350310A1 (en) |
CA (1) | CA2470130A1 (en) |
WO (1) | WO2003051737A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070278256A1 (en) * | 2006-06-06 | 2007-12-06 | Law Brian R | Tamper-evident closure for a container |
US8925755B2 (en) | 2010-04-13 | 2015-01-06 | Ipl, Inc. | Tamper evident system and method |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2428669B (en) * | 2003-03-26 | 2007-08-15 | Portola Packaging Ltd | Closures and containers in combination therewith |
GB0702720D0 (en) * | 2007-02-13 | 2007-03-21 | Obrist Closures Switzerland | A ring pull for a closure |
Citations (14)
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US3167202A (en) * | 1964-01-15 | 1965-01-26 | Tolciss Joseph | Closure assembly for container neck |
US3656668A (en) * | 1969-09-11 | 1972-04-18 | Container Corp | Neck assembly for thin walled container |
US3700133A (en) * | 1970-12-17 | 1972-10-24 | Continental Can Co | Threaded safety closure |
US3804139A (en) * | 1973-02-08 | 1974-04-16 | Mauser Kg | Container of synthetic plastic material |
US4399921A (en) * | 1982-04-09 | 1983-08-23 | Owens-Illinois, Inc. | Child resistant closure and container |
US4494682A (en) * | 1982-07-07 | 1985-01-22 | Hunt-Wesson Foods, Inc. | Pouring fitment with container and closure therefor |
US4809870A (en) * | 1985-12-06 | 1989-03-07 | Goodall Donald T | Inserts for fixing into openings |
US5788100A (en) * | 1993-10-27 | 1998-08-04 | Sturk; Ron | Closure with two position lock ring |
US6161711A (en) * | 1998-01-20 | 2000-12-19 | Tri State Distribution, Inc. | Container and closure system |
US6386405B1 (en) * | 2000-12-18 | 2002-05-14 | Royal Packaging Industries Van Leer Nv | Snap on closure and method |
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US6783014B2 (en) * | 2001-06-07 | 2004-08-31 | Rexam Medical Packaging Inc. | Double shell closure with support ribs |
US20050092750A1 (en) * | 2003-05-27 | 2005-05-05 | Lohrman Richard D. | Method of joining separable components and container closure system formed by the same |
US7261216B2 (en) * | 2002-09-11 | 2007-08-28 | Novelis, Inc. | Reclosable metal beverage can |
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US3770156A (en) * | 1971-11-26 | 1973-11-06 | Growth Int Ind Corp | Tamper proof closure |
US4785963A (en) * | 1988-01-11 | 1988-11-22 | Rieke Corporation | Tamper-evident buttress plug closure |
GB9111022D0 (en) * | 1991-05-22 | 1991-07-17 | Ici Plc | Improvement relating to pouring devices for viscous liquid such as paint |
DE4240485C1 (en) * | 1992-12-02 | 1993-12-16 | Limburg Gmbh Blechwaren | Vessel-outlet seal with cap screwing onto base ring - has two walls on ring enclosing annular groove and third with external thread for cap. |
EP1371571B1 (en) * | 1998-05-22 | 2006-03-15 | Yoshino Kogyosho Co., Ltd. | Jig for holding an inner plug	 |
FR2782500B1 (en) * | 1998-08-03 | 2000-10-13 | Smurfit Socar Sa | SEALING DEVICE, PARTICULARLY FOR CONTAINING FOOD LIQUIDS |
-
2002
- 2002-12-12 CA CA002470130A patent/CA2470130A1/en not_active Abandoned
- 2002-12-12 WO PCT/CA2002/001905 patent/WO2003051737A2/en not_active Application Discontinuation
- 2002-12-12 AU AU2002350310A patent/AU2002350310A1/en not_active Abandoned
- 2002-12-12 US US10/498,528 patent/US20050124057A1/en not_active Abandoned
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3167202A (en) * | 1964-01-15 | 1965-01-26 | Tolciss Joseph | Closure assembly for container neck |
US3656668A (en) * | 1969-09-11 | 1972-04-18 | Container Corp | Neck assembly for thin walled container |
US3700133A (en) * | 1970-12-17 | 1972-10-24 | Continental Can Co | Threaded safety closure |
US3804139A (en) * | 1973-02-08 | 1974-04-16 | Mauser Kg | Container of synthetic plastic material |
US4399921A (en) * | 1982-04-09 | 1983-08-23 | Owens-Illinois, Inc. | Child resistant closure and container |
US4494682A (en) * | 1982-07-07 | 1985-01-22 | Hunt-Wesson Foods, Inc. | Pouring fitment with container and closure therefor |
US4809870A (en) * | 1985-12-06 | 1989-03-07 | Goodall Donald T | Inserts for fixing into openings |
US5788100A (en) * | 1993-10-27 | 1998-08-04 | Sturk; Ron | Closure with two position lock ring |
US6161711A (en) * | 1998-01-20 | 2000-12-19 | Tri State Distribution, Inc. | Container and closure system |
US6450357B1 (en) * | 1998-02-24 | 2002-09-17 | Bericap Gmbh & Company Kg | Plastic lid with plastic seal |
US6386405B1 (en) * | 2000-12-18 | 2002-05-14 | Royal Packaging Industries Van Leer Nv | Snap on closure and method |
US6783014B2 (en) * | 2001-06-07 | 2004-08-31 | Rexam Medical Packaging Inc. | Double shell closure with support ribs |
US7261216B2 (en) * | 2002-09-11 | 2007-08-28 | Novelis, Inc. | Reclosable metal beverage can |
US20050092750A1 (en) * | 2003-05-27 | 2005-05-05 | Lohrman Richard D. | Method of joining separable components and container closure system formed by the same |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070278256A1 (en) * | 2006-06-06 | 2007-12-06 | Law Brian R | Tamper-evident closure for a container |
US8925755B2 (en) | 2010-04-13 | 2015-01-06 | Ipl, Inc. | Tamper evident system and method |
Also Published As
Publication number | Publication date |
---|---|
WO2003051737A2 (en) | 2003-06-26 |
CA2470130A1 (en) | 2003-06-26 |
AU2002350310A1 (en) | 2003-06-30 |
WO2003051737A3 (en) | 2003-10-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |