EP0177047B1 - Unter Druck stehender, mit einer ausdehnbaren Wandung und einer Membrane versehener Behälter - Google Patents

Unter Druck stehender, mit einer ausdehnbaren Wandung und einer Membrane versehener Behälter Download PDF

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Publication number
EP0177047B1
EP0177047B1 EP85112585A EP85112585A EP0177047B1 EP 0177047 B1 EP0177047 B1 EP 0177047B1 EP 85112585 A EP85112585 A EP 85112585A EP 85112585 A EP85112585 A EP 85112585A EP 0177047 B1 EP0177047 B1 EP 0177047B1
Authority
EP
European Patent Office
Prior art keywords
barrier
wall
chamber
product
ring
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 - Lifetime
Application number
EP85112585A
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English (en)
French (fr)
Other versions
EP0177047A3 (en
EP0177047A2 (de
Inventor
George B. Diamond
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.)
Individual
Original Assignee
Individual
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
Priority claimed from US06/658,274 external-priority patent/US4562942A/en
Priority claimed from US06/771,491 external-priority patent/US4641765A/en
Application filed by Individual filed Critical Individual
Publication of EP0177047A2 publication Critical patent/EP0177047A2/de
Publication of EP0177047A3 publication Critical patent/EP0177047A3/en
Application granted granted Critical
Publication of EP0177047B1 publication Critical patent/EP0177047B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • B05B11/026—Membranes separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container
    • B05B11/027—Membranes separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container inverted during outflow of content

Definitions

  • the invention relates to a pressurizable container according to the preamble of the claim.
  • a container of this type is disclosed in US-A-2 815 152.
  • a critical portion of a container of this type is the mounting means, which is intended to mount the edge of the flexible barrier to the can wall.
  • An important draw back of this type of a container consists in a certain leakage of product as well as propellant past the edge of the barrier as the can wall expands and returns to the un-expanded condition.
  • Fig. 1 shows a cup shaped barrier assembled with a sealing ring prior to insertion into the can body.
  • Fig. 2 shows the can body prior to the insertion of the barrier.
  • Fig. 3 shows a sealing ring embodiment for the barrier for providing the seal between the product and propellant chambers of the pressurized can.
  • Fig. 4 shows an alternate embodiment of pressurized can in which the barrier is mounted directly to the can wall.
  • the pressurizable can includes an outer can 10 comprising a cylindrical body, defined by a cylindrical peripheral side wall 12, an open top 14, and a closed bottom 16 shaped to allow the pressurized can to stably rest on a flat surface.
  • the can bottom 16 includes a peripheral rounded ridge 17 on whose crest the can sits, and a rounded depression 18.
  • Other bottom shapes can be used to increase the strength of the can, and a number of such shapes are generally known in the art.
  • the top of the depression has a pluggable hole 19 through it into the can.
  • a gaseous or liquified propellant is conventionally supplied (from a source not shown) through the hole 19 after the top opening 14 has been closed so that the can may be pressurized. Thereafter, a plug 21 is installed in the hole 19 to close it.
  • the material of the can is typically metal. However, other materials like strengthened paper or plastic may be used, so long as it is strong enough to contain the pressure in a filled pressurized can. For safety, it is desirable often that the can be of metal.
  • the can wall according to the invention is sufficiently thin that it expands when the can chamber is pressurized.
  • the dimension of the can wall across the can chamber, such as the diameter of a cylindrical can wall, will increase in length.
  • the can wall may be made by a drawn and ironed process from sheet steel or even sheet aluminum.
  • the container according to the invention includes means for mounting the edge of the flexible barrier to the can wall and for sealing the mounting for preventing the product and propellant from leaking past the edge of the barrier as the can wall expands and returns to its unexpanded condition.
  • This means may take any of several forms, as described below.
  • the initial pressure and quantity of the propellant in the can need not be very high, and with some very fluent products and relatively larger discharge valve orifices, the can pressure can be quite low for low viscosity products, as compared with the conventional aerosol barrier can pressure.
  • This lower pressure helps to avoid stress on the seal and can can wall, permitting use of thinner walls and simpler bottoms, but higher pressure could also be used with cans whose walls and bottoms are designed to withstand this stress.
  • propellants which may be placed in the pressure chamber, including various compressed gases or liquified gases.
  • the compressed gas pressure chamber occupies in the range of 1/3-1/4 of the total volume of the entire can.
  • the propellant is in the form of a liquified gas
  • the pressure chamber occupies in the range of 1/10-1/50 of the total volume of the can. It is economically desirable to produce a standard can design which can include a barrier that is adapted for either type of propellant, that is where the propellant chamber can be relatively smaller in volume or where it must be larger. The invention permits this.
  • fluent products which may be contained in and expelled from the can 10, including quite fluent liquids of a viscosity of 10,000 cps or less and higher viscosity products like processed foods, e.g. cheese at a viscosity upwards of 300,000 cps or even higher, depending on the rheological properties of the product.
  • Very low viscosity products such as water and alcohol (1 cps or less) may also be contained and expelled.
  • a barrier 20 in the can which is shown in the shape of a cup.
  • the barrier is a sheet of greater cross-section than the can, and the barrier sheet may be cut and folded so that the cup shape may be defined. Further, the sheet may have a pocket or generally tubular shape or it may be flat, although its surface area and shape are preferably such that the sheet will extend to the closed cover of the can, as described below.
  • the cup shaped barrier has a side wall 22 and a closed bottom.
  • the barrier may simply be a flat sheet which is deformed in use. It may be a sheet with cut regions which enable the sheet to be shaped into a cup, and the cut regions of the sheet are attached to the can at their margins.
  • the cup is of a flexible material so that the cup may be filled and later everted as described below.
  • the cup may also be made by vacuum forming or blow molding.
  • the material of the barrier 20 need merely be sufficiently ductile and flexible to evert as described below and be impervious to the product and to the propellant which contacts the barrier at its opposite sides.
  • the material is preferably not a highly stretchable material like rubber, although some stretching may be desired.
  • an inexpensive plastic sheet or tube material of substantially uniform thickness and flexibility may be folded and heated to form a cup-shaped bag. Suitable plastics could include polyethylene, polypropylene, and so forth.
  • the barrier may be made of a paper, e.g. a waxed paper. It may be of any appropriate fabric. It could even be a metallic barrier, such as an aluminum film, or metallized plastic, such as aluminum on Mylar or Saran.
  • the means for mounting and sealing the barrier 20 to side wall 12 of can 10 may take several forms. In general, the mounting and sealing means must maintain the seal despite the expansion of the can. If can wall 12 is smooth and continuous, a seal may be more easily maintained, in most cases.
  • the specific forms of the mounting and sealing means described below include ring seals as well as adhesives and melt sealing.
  • Fig. 1 shows a general ring seal embodiment in which a barrier fastening ring 24 is inserted into the barrier 20 and is positioned in the region near the upper edge 26 of the cup shape.
  • the barrier 20 with its ring 24 are inserted into the can 10 and are positioned a distance down from the open top 14 of the can.
  • the dimensions of the ring 24 and the barrier are selected such that the ring 24 can snugly fit against the peripheral side wall 12 of the can 10, thereby securing the barrier cup 20 firmly in the can.
  • the can 10 is divided by the cup into the upper product chamber and the bottom propellant chamber.
  • the size and shape of the barrier are coordinated with the height of the can 10 and with the position of the ring 24 along the height of the can intermediate the upper and lower ends so that when the barrier is sub stantially fully extended, it will extend toward the bottom of the can and be substantially fully in contact with the peripheral side of the can when the can is loaded with the product and it will extend toward the top of the can and be substantially fully in contact with the side of the can and with the cover over the can when all the product has been expelled.
  • barrier 20 could be slightly larger than the upper region, it is preferable that the barrier substantially fill the upper region of the can when fully everted, barely leaving some unfilled space, so that it cannot be pinched off by islanding caused by the propellant and so that nearly all of the product may be expelled. This makes it unnecessary to use a tube or other device to prevent pinch-off. Any suitable type of valve may be used in the discharge opening.
  • the initial volume of the upper product chamber may be much larger than that of the bottom propellant chamber, on the order of 15 or 20 to one, thereby utilizing the majority of the space within the can body for the product.
  • the initial volume of the product chamber to the initial volume of the propellant chambers would typically be on the order of 2 or 3 to 1. To accommodate these different chambers of different volume in a can of a standard size, and to enable the two chambers to have a correct volume relationship it is desirable to be able to position the ring 46 (Fig 3) and the barrier at appropriate selected positions along the height of the can wall.
  • the barrier size and shape are selected so that the barrier will press against the inside of the can cover on eversion to expel product, and the barrier will not be folded or wrinkled there but will instead be fully extended.
  • the two chambers are sealed off at the peripheral side wall of the can by the outward force exerted by the ring 46 on the wall 12.
  • the pressures in the product and propellant chambers are identical when the discharge valve 38 (Fig. 4) is closed and are nearly identical when that valve is open, the holding ring is not likely to move along the wall of the can.
  • the can is pressurized.
  • the internal pressure in the can causes the side wall of the can to bulge slightly in diameter.
  • the can 10 is of aluminum with a 65 mm diameter and with a wall that is 0,13 mm thick, when the can is pressurized at normal room temperature of 70°C, its diameter will increase approximately 0.1 mm. If this expansion is not compensated for, a radial clearance will be created between the interior of the can wall and the exterior of the ring 24.
  • the radial clearance will provide a leakage path between the product and propellant chambers allowing gas and/or product to bypass the barrier cup 20, resulting in a pressure reduction in the can, leakage of propellant out of the valve of the can and inability to properly expel all of the product from the product chamber.
  • the ring 46 is a solid, annular body with an exterior peripheral channel 48 which opens radially outwardly.
  • the channel receives and holds in it an elastic, resilient, compressible sealing element 50, illustrated as an O-ring.
  • the diameter of the sealing element ring 50 is slightly greater than the internal diameter of the can, even when the can has stretched under pressure.
  • the above technique of maintaining a seal rely upon the elasticity of at least one of the can and ring for maintaining the seal, using the resilience of the ring to maintain the seal.
  • the sealing effectiveness can be increased through the introduction of sealing compounds between the fastening ring and the barrier and/or between the barrier and the can wall.
  • the invention simplifies production of the can and its product-propellant barrier and eliminates concern about close manufacturing tolerances for the barrier and for its attachment to the can.
  • the consistent predictable shape of the can 10 was critical to the operation of the barrier system.
  • an indentation in the container above the piston would prevent the piston from traveling up the peripheral side wall of the can.
  • the container can be of almost any size or shape. It is not even necessary that the peripheral side walls of the container be generally parallel to each other as with other known systems. Consequently, cans could be used with either esthetically pleasing shapes or other shapes which are designed in accordance with human factor engineering principles.

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

Claims (1)

  1. Druckbehälter (10) zur Aufnahme eines unter Druck stehenden fließfähigen Gutes und zur Abgabe des Gutes durch eine Abgabeöffnung (38), umfassend:
    - eine Behälterwand (12), die eine Behälterkammer definiert und ein oberes Ende mit der Abgabeöffnung sowie ein gegenüberliegendes unteres Ende aufweist; die Behälterwand (12) ist elastisch und dann geringfügig expansionsfähig, wenn die Behälterkammer unter Druck gesetzt wird und in nicht expandierten Zustand zurückkehrt, wenn der Druck in der Behälterkammer auf Null reduziert wird;
    - eine flexible Sperre (20) mit einer Kante, die an der Behälterwand (12) in der Behälterkammer montiert ist und die die Behälterkammer in eine Gutkammer (30) zwischen der Sperre (20) und dem oberen Ende der Behälterwand (12) sowie eine Treibmittelkammer (32) zwischen der Sperre (20) und dem unteren Ende der Behälterwand (12) unterteilt, wobei die Sperre (20) einen Werkstoff aufweist, der sowohl gegenüber dem Gut als auch dem Treibmittel undurchlässig ist;
    - Mittel zum Montieren der Kante der flexiblen Sperre (20) an der Behälterwand (12) derart, daß die Sperre (20) gegen die Behälterwand (12) abgedichtet wird, um ein Überströmen von Gut und Treibmittel über die Kante der Sperre (20) hinaus dann zu verhindern, wenn sich die Behälterwand (12) ausdehnt bzw. wieder in ihren nicht expandierten Zustand zurückkehrt, wobei
    - die flexible Sperre (20) dann gegen das untere Ende hin ausfahrbar ist, wenn die Gutkammer (30) anfänglich mit fließfähigem Gut gefüllt ist und sich langsam gegen das obere Ende ausdehnt, zufolge des in der Treibmittelkammer (32) befindlichen Treibmittels, um das fließfähige Gut aus der Behälterkammer durch die Abgabeöffnung (38) auszutreiben, dadurch gekennzeichnet, daß die Behälterwand (12) zylindrisch ist, daß die Montagemittel einen Ring (46) umfassen, dessen Umfang der Behälterwand (12) zugewandt ist, der ferner getrennte, expandier- und kontraktionsfähige Mittel (50) an seinem Umfang aufweist, um mit der Behälterwand (12) in Eingriff zu gelangen, und der von einer solchen Größe in Bezug auf den Durchmesser des Behälters ist, daß die expandier- und kontraktionsfähigen Mittel (50) nach dem Montieren des Ringes (46) und der Sperre (20) in der Behälterkammer verbogen und zusammengezogen werden, während die Behälterkammer drucklos gemacht wird, und daß die expandierfähigen und kontraktionsfähigen Mittel (50) im Hinblick auf ein solches Expandieren gestaltet sind, daß die Dichtigkeit zwischen dem Umfang des Ringes (46) und der Behälterwand (12) dann beibehalten wird, wenn die Behälterkammer unter Druck gesetzt und der Durchmesser der Behälterwand (12) geringfügig vergrößert wird.
EP85112585A 1984-10-05 1985-10-04 Unter Druck stehender, mit einer ausdehnbaren Wandung und einer Membrane versehener Behälter Expired - Lifetime EP0177047B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US06/658,274 US4562942A (en) 1984-07-03 1984-10-05 Rolling diaphragm barrier for pressurized container
US658274 1984-10-05
US771491 1985-09-05
US06/771,491 US4641765A (en) 1984-10-05 1985-09-05 Expandable pressurized barrier container

Publications (3)

Publication Number Publication Date
EP0177047A2 EP0177047A2 (de) 1986-04-09
EP0177047A3 EP0177047A3 (en) 1987-10-07
EP0177047B1 true EP0177047B1 (de) 1991-03-20

Family

ID=27097597

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85112585A Expired - Lifetime EP0177047B1 (de) 1984-10-05 1985-10-04 Unter Druck stehender, mit einer ausdehnbaren Wandung und einer Membrane versehener Behälter

Country Status (6)

Country Link
EP (1) EP0177047B1 (de)
JP (1) JPS61178873A (de)
AU (1) AU582189B2 (de)
CA (1) CA1255266A (de)
DE (1) DE3582213D1 (de)
IL (1) IL76599A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61178873A (ja) * 1984-10-05 1986-08-11 ジヨ−ジ　ビ−．ダイアモンド 加圧容器
US4842165A (en) * 1987-08-28 1989-06-27 The Procter & Gamble Company Resilient squeeze bottle package for dispensing viscous products without belching

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE24918E (en) * 1949-10-07 1961-01-03 Dispensing package and method
NL288808A (de) * 1962-02-19
JPS4912981A (de) * 1972-05-10 1974-02-04
US3931834A (en) * 1974-06-26 1976-01-13 The Goodyear Tire & Rubber Company Expansion tank diaphragm assembly
DE2500996A1 (de) * 1975-01-11 1976-07-15 Ode Pressluftkartusche zur austreibung von fluessigkeiten aller art aus zerstaeuberflaschen, spraydosen usw.
US4089443A (en) * 1976-12-06 1978-05-16 Zrinyi Nicolaus H Aerosol, spray-dispensing apparatus
US4562942A (en) * 1984-07-03 1986-01-07 Diamond George B Rolling diaphragm barrier for pressurized container
JPS61178873A (ja) * 1984-10-05 1986-08-11 ジヨ−ジ　ビ−．ダイアモンド 加圧容器

Also Published As

Publication number Publication date
IL76599A (en) 1989-06-30
IL76599A0 (en) 1986-02-28
JPS61178873A (ja) 1986-08-11
DE3582213D1 (de) 1991-04-25
EP0177047A3 (en) 1987-10-07
CA1255266A (en) 1989-06-06
EP0177047A2 (de) 1986-04-09
AU4826785A (en) 1986-04-10
AU582189B2 (en) 1989-03-16

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