GB1602293A - Method of closing a bag-in-can aerosol - Google Patents

Method of closing a bag-in-can aerosol Download PDF

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Publication number
GB1602293A
GB1602293A GB3822677A GB3822677A GB1602293A GB 1602293 A GB1602293 A GB 1602293A GB 3822677 A GB3822677 A GB 3822677A GB 3822677 A GB3822677 A GB 3822677A GB 1602293 A GB1602293 A GB 1602293A
Authority
GB
United Kingdom
Prior art keywords
bag
neck
cup
mouth
container
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.)
Expired
Application number
GB3822677A
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.)
Crown Packaging UK Ltd
Original Assignee
Metal Box PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metal Box PLC filed Critical Metal Box PLC
Priority to GB3822677A priority Critical patent/GB1602293A/en
Priority to GR57180A priority patent/GR62160B/en
Publication of GB1602293A publication Critical patent/GB1602293A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
    • B65B7/2842—Securing closures on containers
    • B65B7/285—Securing closures on containers by deformation of the closure
    • 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
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/60—Contents and propellant separated
    • B65D83/62—Contents and propellant separated by membrane, bag, or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Description

(54) METHOD OF CLOSING A BAG-IN-CAN AEROSOL (71) We, METAL Box LIMITED, of Queens House, Forbury Road, Reading RG1 3JH, Berkshire, a British Company, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:- This invention relates to a method and apparatus for filling and closing an aerosol container comprising an outer can, an inner bag and a mounting cup fitted with a value and to a container closed by the method.
United States Patent Specfication 3,477, 195 describes a method of pressurising an aerosol container having therein a product isolating collapsible bag. This prior art method includes the steps of fitting a bag into the container, attaching a valve and mounting cup to a neck portion of the bag, supporting the neck portions respectively of the container and bag in spaced relationship to each other, injecting propellant liquid between the spaced neck portions and so into the container, and thereafter sealingly securing the neck portions to close the container.
This invention provides a method of attaching a mounting cup to the bag and a convenient means for lifting the cup and bag neck to permit the insertion of propellant into the container.
In a first aspect this invention provides a method of closing an aerosol can having an outer container body and a bag contained therein, said bag having a neck extending through the mouth of the container body to terminate in a flange outside the mouth of the body, said method including the steps of fitting a valve mounting cup into the neck of the bag; engaging expanding members with the side wall of the mounting cup to sealingly engage the mounting cup with the neck of the bag; moving the expanding members away from the mouth of the can to lift the mount ing cup and bag neck into spaced relationship with the container mouth; inserting propellant through the space into the container body; moving the expanding members bag towards the mouth of the can to engage the bag neck and cup with the mouth of the container body; and expanding the side wall of the cup to engage the bag neck with the mouth of the can body and so close the container.
In one embodiment of the method the mounting cup has a bead standing proud of the side wall and the neck of the bag has an annular recess to receive the cup bead so that the cup is snap fitted into the neck of the bag. In another embodiment of the method the bag to cup seal is augmented by an adhesive.
In a second aspect the invention provides an aerosol container closed by the method in the first aspect. The invention further provides apparatus for carrying out a method on the first aspect.
One embodiment of the invention will now be described by way of example and with reference to the accompanying drawings in which: Fig. 1 is a sectional side view of an aerosol container during filling with a fluid product and a mounting cup; Fig. 2 is a sectional side view of the container of Fig. 1 during the first swaging operation; and Fig. 3 is a sectional side view of the container of Figs. 1 and 2 after the second swaging operation.
Fig. 1 shows an aerosol container comprising a can body 1, having a sidewall 2 joined to a domed end 3 and a cone top 4 by double seams. A mouth 5, in the cone top 4, is defined by an outward curl 6. As depicted in Fig. 1, a bag 7 has been fitted in the can body 1 in such a way that the bottom 8 of the bag 7 rests on the domed end 3 of the body 1; however the bag 7 has a cylindrical neck portion 9 which extends upwards from the body of the bag through the mouth 5 to terminate in an outwardly directed flange 10. The outwardly directed flange 10 rests on the curl 6 so that there is a gap between the neck 9 and the curl 6.
In an alternative embodiment the bag 7 hangs freely from the flange 10 which is supported by the curl 6. A mounting cup 11 is depicted above the can 1 in Fig. 1 to show that the mounting cup 11 has an annular hook 12, a side wall 13 and a central boss 14 in which a known valve 15 is fitted. The diameter of the sidewall 13 is such that the cup 11 can be fitted easily in the neck portion 9 of the bag 7 with the annular hook 12 in engagement with flange 10 of the bag.
The method of filling and closing the aerosol container of Fig. 1 is as follows.
The bag 7 is first fitted into the can body 1.
A fluid product 16 is filled into the bag 7 as shown in Fig. 1. The cup 11 is then fitted into the neck 9 of the bag 7 and pushed downwards against the curl 6 to engage the flange 10 of the bag with the hook 12 and so close the bag. The sidewall 13 of the mounting cup is then swaged radially outwards to sealingly engage with the inside of the neck 9 of the bag by means of expanding members 17, which are moved by the axial motion of a wedge member 18.
The bag neck 9 is therefore firmly fixed by friction to the cup 11.
In Fig. 2 the expanding members 17 have been lifted away from the cone top 4 so that there is a gap between the flange 10 of the bag and the curl 6 of the cone top.
In this position there is a passage "P" under the flange 10 and around the neck 9 which permits the introduction of propellant into the space around the filled bag 7 inside the can body 1.
A quality of propellant is introduced through the passage P and thereafter the valve cup 11 and bag neck 9 are lowered to engage the flange 10 of the bag with the curl 6 of the cone top 4. The partially swaged sidewall 13 is then further swaged radially outwards to engage the neck 9 with the mouth 5 of the container 1 and make a seal, as shown in Fig. 3, in which the flange 10 serves as a gasket held between the hook 11 and the curl 6, It will be understood that whilst our method has been described in terms of a single expanding means used for the first partial swage to fix the cup 11 to the neck 9 and the second final swage to close the container, a simplified tool may be used for the first swage and the second swage may be done in a conventional under cup pressuring apparatus.
Whilst the invention has been described with reference to a method in which the body neck is fixed to the mounting cup solely by a swaging operation it is not limited to such. The mounting cup may be provided with a bulge which extends outwardly from the sidewall 13, and is adapted to b a snap-fit in a bead in the neck 9 of the bag. In an alternative method the bag neck is fixed adhesively to the valve cup to augment the seal of neck to cup.
It will be further understood that the can body may be of any of the known kinds such as cans having soldered or welded side seams. Cans formed by drawing or impact extrusion from a single metal blank (commonly called monobloc containers) may also be used, as may glass containers. However when containers having only a small mouth are used the bag must be of a kind having a body which can be collapsed to a cross section small enough to permit passage through the mouth.
For example, suitable bags are described in British Patent Specification numbered 1414329 and United States Patent number 3,477,195.
These specifications also describe bags which incorporate dimples or folds in their sidewalls which serve to control the shape of the bags, as they collapse during the dispensing of product, so that the product does not become trapped in the bag. An alternative means to control the bag shape is described in our co-pending British Patent Application 34722/76 (Serial No.
1587731), in which a piece of tubing lies within the bag to prevent the bag folding to trap product and also serves to provide a passage, for product from the bottom of the bag to the valve.
The bag is made from a resilient plastics material chosen to have good barrier properties to separate the product from the propellant and also to permit the degree of stretch required for our method.
WHAT WE CLAIM IS 1. A method of closing an aerosol can having an outer container body and a bag contained therein, said bag having a neck extending through the mouth of the container body to terminate in a flange outside the mouth of the body, said method including the steps of fitting a valve mounting cup into the neck of the bag; engaging expanding members with the side wall of the mounting cup to sealingly engage the mounting cup with the neck of the bag; moving the expanding members away from the mouth of the can to lift the mounting cup and bag neck into spaced relationship with the container mouth; inserting propellant through the space into the container body; moving the expanding members bag towards the mouth of the can to engage the bag neck and cup with the mouth of the container body; and expanding the side wall of the cup to engage the bag neck with the mouth of the can body and so close the container.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    flange 10 rests on the curl 6 so that there is a gap between the neck 9 and the curl 6.
    In an alternative embodiment the bag 7 hangs freely from the flange 10 which is supported by the curl 6. A mounting cup 11 is depicted above the can 1 in Fig. 1 to show that the mounting cup 11 has an annular hook 12, a side wall 13 and a central boss 14 in which a known valve 15 is fitted. The diameter of the sidewall 13 is such that the cup 11 can be fitted easily in the neck portion 9 of the bag 7 with the annular hook 12 in engagement with flange 10 of the bag.
    The method of filling and closing the aerosol container of Fig. 1 is as follows.
    The bag 7 is first fitted into the can body 1.
    A fluid product 16 is filled into the bag 7 as shown in Fig. 1. The cup 11 is then fitted into the neck 9 of the bag 7 and pushed downwards against the curl 6 to engage the flange 10 of the bag with the hook 12 and so close the bag. The sidewall 13 of the mounting cup is then swaged radially outwards to sealingly engage with the inside of the neck 9 of the bag by means of expanding members 17, which are moved by the axial motion of a wedge member 18.
    The bag neck 9 is therefore firmly fixed by friction to the cup 11.
    In Fig. 2 the expanding members 17 have been lifted away from the cone top 4 so that there is a gap between the flange 10 of the bag and the curl 6 of the cone top.
    In this position there is a passage "P" under the flange 10 and around the neck 9 which permits the introduction of propellant into the space around the filled bag 7 inside the can body 1.
    A quality of propellant is introduced through the passage P and thereafter the valve cup 11 and bag neck 9 are lowered to engage the flange 10 of the bag with the curl 6 of the cone top 4. The partially swaged sidewall 13 is then further swaged radially outwards to engage the neck 9 with the mouth 5 of the container 1 and make a seal, as shown in Fig. 3, in which the flange 10 serves as a gasket held between the hook 11 and the curl 6, It will be understood that whilst our method has been described in terms of a single expanding means used for the first partial swage to fix the cup 11 to the neck 9 and the second final swage to close the container, a simplified tool may be used for the first swage and the second swage may be done in a conventional under cup pressuring apparatus.
    Whilst the invention has been described with reference to a method in which the body neck is fixed to the mounting cup solely by a swaging operation it is not limited to such. The mounting cup may be provided with a bulge which extends outwardly from the sidewall 13, and is adapted to b a snap-fit in a bead in the neck 9 of the bag. In an alternative method the bag neck is fixed adhesively to the valve cup to augment the seal of neck to cup.
    It will be further understood that the can body may be of any of the known kinds such as cans having soldered or welded side seams. Cans formed by drawing or impact extrusion from a single metal blank (commonly called monobloc containers) may also be used, as may glass containers. However when containers having only a small mouth are used the bag must be of a kind having a body which can be collapsed to a cross section small enough to permit passage through the mouth.
    For example, suitable bags are described in British Patent Specification numbered 1414329 and United States Patent number 3,477,195.
    These specifications also describe bags which incorporate dimples or folds in their sidewalls which serve to control the shape of the bags, as they collapse during the dispensing of product, so that the product does not become trapped in the bag. An alternative means to control the bag shape is described in our co-pending British Patent Application 34722/76 (Serial No.
    1587731), in which a piece of tubing lies within the bag to prevent the bag folding to trap product and also serves to provide a passage, for product from the bottom of the bag to the valve.
    The bag is made from a resilient plastics material chosen to have good barrier properties to separate the product from the propellant and also to permit the degree of stretch required for our method.
    WHAT WE CLAIM IS 1. A method of closing an aerosol can having an outer container body and a bag contained therein, said bag having a neck extending through the mouth of the container body to terminate in a flange outside the mouth of the body, said method including the steps of fitting a valve mounting cup into the neck of the bag; engaging expanding members with the side wall of the mounting cup to sealingly engage the mounting cup with the neck of the bag; moving the expanding members away from the mouth of the can to lift the mounting cup and bag neck into spaced relationship with the container mouth; inserting propellant through the space into the container body; moving the expanding members bag towards the mouth of the can to engage the bag neck and cup with the mouth of the container body; and expanding the side wall of the cup to engage the bag neck with the mouth of the can body and so close the container.
  2. 2. A method according to claim 1
    wherein the side wall of the mounting cup includes a convex annular bead which is entered into snap-fit engagement with a bag neck having a groove to receive the bead.
  3. 3. A method according to claim 1 or claim 2 wherein the mounting cup is adhered to the neck of the bag by means of an adhesive.
  4. 4. A method of closing an aerosol can substantially as hereinbefore described with reference to the accompanyong draw ings.
  5. 5. An aerosol container closed by a method according to any preceding claim and substantially as hereinbefore described with reference to the accompanying draw ings.
GB3822677A 1977-09-13 1977-09-13 Method of closing a bag-in-can aerosol Expired GB1602293A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3822677A GB1602293A (en) 1977-09-13 1977-09-13 Method of closing a bag-in-can aerosol
GR57180A GR62160B (en) 1977-09-13 1978-09-07 Containers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3822677A GB1602293A (en) 1977-09-13 1977-09-13 Method of closing a bag-in-can aerosol

Publications (1)

Publication Number Publication Date
GB1602293A true GB1602293A (en) 1981-11-11

Family

ID=10402080

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3822677A Expired GB1602293A (en) 1977-09-13 1977-09-13 Method of closing a bag-in-can aerosol

Country Status (2)

Country Link
GB (1) GB1602293A (en)
GR (1) GR62160B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999016684A1 (en) 1997-10-01 1999-04-08 Osaka Shipbuilding Co., Ltd. Double pressurized container for charging undercup and double pressurized products using the container
WO2003099681A1 (en) 2002-05-24 2003-12-04 Btg International Limited Container for the generation of therapeutic microfoam
WO2005095228A1 (en) * 2004-03-03 2005-10-13 Unilever Plc Frozen aerated product in a container and a method for manufacturing such

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999016684A1 (en) 1997-10-01 1999-04-08 Osaka Shipbuilding Co., Ltd. Double pressurized container for charging undercup and double pressurized products using the container
EP1065156A1 (en) * 1997-10-01 2001-01-03 Osaka Shipbuilding Co., Ltd. Double pressurized container for charging undercup and double pressurized products using the container
EP1065156A4 (en) * 1997-10-01 2008-07-16 Osaka Shipbuilding Double pressurized container for charging undercup and double pressurized products using the container
WO2003099681A1 (en) 2002-05-24 2003-12-04 Btg International Limited Container for the generation of therapeutic microfoam
US9457160B2 (en) 2002-05-24 2016-10-04 Btg International Limited Container for the generation of therapeutic microfoam
WO2005095228A1 (en) * 2004-03-03 2005-10-13 Unilever Plc Frozen aerated product in a container and a method for manufacturing such

Also Published As

Publication number Publication date
GR62160B (en) 1979-03-01

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940515