GB2324297A - Closure with a variable volume chamber - Google Patents
Closure with a variable volume chamber Download PDFInfo
- Publication number
- GB2324297A GB2324297A GB9815424A GB9815424A GB2324297A GB 2324297 A GB2324297 A GB 2324297A GB 9815424 A GB9815424 A GB 9815424A GB 9815424 A GB9815424 A GB 9815424A GB 2324297 A GB2324297 A GB 2324297A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- closure
- chamber
- paste
- aperture
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D47/00—Closures with filling and discharging, or with discharging, devices
- B65D47/04—Closures with discharging devices other than pumps
- B65D47/20—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge
- B65D47/2018—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge comprising a valve or like element which is opened or closed by deformation of the container or closure
- B65D47/2031—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge comprising a valve or like element which is opened or closed by deformation of the container or closure the element being formed by a slit, narrow opening or constrictable spout, the size of the outlet passage being able to be varied by increasing or decreasing the pressure
-
- 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
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1001—Piston pumps
-
- 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
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1094—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle having inlet or outlet valves not being actuated by pressure or having no inlet or outlet valve
-
- 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
- B65D47/20—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge
- B65D47/26—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge with slide valves, i.e. valves that open and close a passageway by sliding over a port, e.g. formed with slidable spouts
- B65D47/261—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge with slide valves, i.e. valves that open and close a passageway by sliding over a port, e.g. formed with slidable spouts having a rotational or helicoidal movement
- B65D47/263—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge with slide valves, i.e. valves that open and close a passageway by sliding over a port, e.g. formed with slidable spouts having a rotational or helicoidal movement between tubular parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/02—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement
- G01F11/021—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the piston type
- G01F11/025—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the piston type with manually operated pistons
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/28—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with stationary measuring chambers having constant volume during measurement
- G01F11/288—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with stationary measuring chambers having constant volume during measurement squeezing of the supply vessel causing filling of the measuring chamber and backflow from the measuring chamber to the supply vessel being prevented by a check valve
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Closures For Containers (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Abstract
A closure 18 for a container of viscous fluid comprises a body 19 having a variable volume chamber 22 with an inlet port including a one-way valve 17, an outlet port 15, and a piston 11 slidably mounted in the chamber and having an aperture 12 which can be aligned with the outlet port during inward movement of the piston so that fluid can be expelled. The aperture 12 may be elongate, and relative movement between the piston and the body may be limited by a projection 14 on one of said piston or body, and aperture means 13 on the other of said piston or body. The aperture means may have the shape of an irregular quadrilateral so that the piston can be rotated into a non-dispensing position.
Description
Container Closure
This invention relates to closures and in particular, but not exclusively, to closures for use with pliable containers such as toothpaste tubes, or squeezable tubes of foodstuffs.
It is well known that the contents of a tube may clog the threads of a screw or closure cap after repeated use.
In the cases of a squeezable bottle and a pliable container of paste, or viscous liquid, it is very easy to expel an excess of the contents of the bottle or container by applying excessive pressure to the bottle or container.
Furthermore, where the expulsion of the contents is through hand pressure, the volume of paste expelled from the container may not be uniform from one dispensing operation to another.
Prior art dispensers for viscous fluids or paste are shown in US-A-4,394,939 and US-A-4,903,686. Both these documents disclose rigid containers having a pump chamber into which viscous fluid can be forced via a one-way valve.
The pump chamber can then be caused to contract forcing the viscous fluid through a valved outlet port. The containers disclosed in the two documents are of a relatively complicated construction.
The present invention provides a closure which can be used as a dispenser and which is simple in construction.
According to the present invention there is provided a closure for a container of paste or other viscous fluent material which has a body with a variable volume chamber with an inlet port and an outlet port, the inlet port including a one-way valve allowing paste to flow into the chamber, and a piston slidably mounted in the chamber so that in use relative movement of the piston into the chamber causes paste to egress through the outlet port, a sliding portion of the piston having an aperture therein which can be aligned with the outlet port during inward movement of the piston for expulsion of paste from the chamber in use.
The term "paste" includes viscous fluids, pseudo plastic and thixotropic materials such as toothpaste, artist paints, cosmetics and pharmaceutical creams, ointments etc.
Conveniently the body and valve are formed as a single integral moulded component and are formed from a polyolefin, such as a polypropylene, high density polyethylene, or low density polyethylene, or a thermoplastic elastomer, for example Santoprene (trade mark) available from Monsanto, or Hytrel (trade mark) available from Du Pont.
Preferably the piston is slidably reciprocable within the chamber along a first axis of the chamber to vary the volume of the chamber and is also turnable about said first axis relative to the chamber.
Preferably the chamber outlet is in a portion of the chamber wall in contact with sliding portions of the piston, such that reciprocating movement of the piston keeps the chamber outlet free of encrusted paste.
Preferably the relative movement between the piston and the body is limited by a projection on one of the piston and body engaging in aperture means in the other of the piston and body.
Embodiments of the invention will now be described, by way of example only, and with particular reference to the accompanying drawings, in which:
Figure 1 is a vertical cross-section through a closure according to the present invention in a condition prior to discharge of paste and with details shown in side elevations "a" and "b";
Figure 2 is a vertical cross-section as shown in
Figure 1 with the closure shown in a second condition after discharge of the paste and with details shown in side elevation "c"; Figure 3 is a horizontal cross-section through the closure in a first condition showing details in side elevation "d" and showing externally details of the closure after rotation of a piston thereof;
Figure 4 is a detail of a valve member of the closure shown in the direction of arrow X in Figure 1; and
Figure 5 is a detail of an alternative closure valve member, also shown in the direction of arrow X.
With reference to Figure 1, there is disclosed a screw threaded dispensing closure 18 for use with a container (not shown) containing "paste" such as toothpaste, syrups, creams, tomato puree etc. The closure has a body 19 with an internal screw-thread 21 for securing the closure to a storage container such as a pliable tube or rigid storage container of the type shown in US-A-4,394,939.
Whilst the closure 18 has been shown with a screwthread 21 for attachment to a storage container, other types of connections could be utilised such as snap-on connections, or moulding the closure integrally with the container.
The body 19 has a dispensing chamber 22 formed with a sidewall 16 which is closed, at its end furthest from the thread 21, by a cap or piston 11. The chamber 22 is preferably cylindrical with a tubular sidewall 16. The piston 11 is reciprocable within the chamber and has a tubular sidewall 23 which is telescopically slidable with the tubular sidewall 16 of the body 19. A seal, e.g. a ring seal for a cylindrical chamber, may be located between the two annular sidewalls 16 and 23, or the piston 11 may include an integral seal such as flexible lip seal. The piston 11 may be moulded from a polyolefinic material.
An inlet port 24 between the storage container (not shown) and the dispensing chamber 22 has a one-way check valve 17 located therein which allows paste to flow from the storage container into the dispensing chamber 22 but not to flow substantially in the reverse direction. The one-way valve 17 is hollow and tapers inwardly, being substantially conical in shape, with its wide open-end 25 adjacent the inlet port 24 and its narrower open-end 26 adjacent the chamber 24. Conveniently the valve may have straight sidewalls so that it is frusto-conical in shape, or the sidewalls may be slightly arcuate in a concave form.
Preferably the valve 17 is formed integrally with the body 19, and the whole can be moulded in a polymeric material such as a polyolefinic material, a thermoplastic elastomeric material, a polyurethane elastomer, of a silicone rubber.
The wall thickness of the valve decreases steadily from its wider end 25 to its narrower end 26 so that the narrower open end portion is both flexible and resilient, allowing it to collapse under a load exerted by reverse flow, and then to open when subject to a load exerted by a forward flow of paste. As shown in Figure 4, the narrow end may collapse into a flat shape, or may collapse into an undulating form like a cruciform shape (as shown in Figure 5).
The chamber 22 has a circular outlet port 15 in the sidewall 16, and the sidewall 23 of the piston 11 has an elongate aperture 12 therein. The aperture 12 is positioned in the sidewall 23 so that when closed as shown in Figure 1 "a" it is circumferentially aligned with the outlet portion 15 but axially offset so that portions of the sidewall 23 close off the outlet port 15. A second aperture 13 in the sidewall 23, conveniently located diametrically opposite the elongate aperture 12, accommodates an inwardly extending peg or projection 14 on the sidewall of the body 19, which engages in the second aperture 13 allowing limited axial and turning movement of the piston 11 relative to the body 19.
The piston 11, as shown in Figure 1, is capable of limited axial movement in relation to the chamber 22 causing the aperture 12 to align with the outlet port 15 as shown in
Figure 2 and Figure 3. In Figures 2 and 3, the projection 14 abuts the upper end of the aperture 13 limiting the axial inwards movement of the piston .11. From its position shown in Figure 2, the piston 11 can be turned clockwise in the direction of arrow Y relative to the body 19 so as to shut off the outlet port 15, as shown in Figure 3. The relative clockwise turning of the piston 11 is limited by the projection 14 abutting an edge of the aperture 13 as the projection moves from the position shown in elevation "c" to the position shown in elevation Nd".
The closure dispenser 18 operates as follows: (a) Paste is forced from a storage container into the
chamber 22 by, for example, squeezing a pliable
storage container, such as a toothpaste tube, or
displacing a piston in a rigid type storage
container. The action forces the piston 11 upwardly
into the position shown in Figure 1 in which the
chamber has a maximum volume.
(b) The piston 11 is turned anti-clockwise relative to
the body 19 to bring the projection 14 into the
position shown in elevation "b".
(c) The piston is pressed downwardly to expel paste
through the outlet port 15 as the aperture 12 moves
into registry with the port 15. This load exerted on
the paste in chamber 22 causes the valve 17 to
collapse, as shown in Figure 1 and Figure 4, to
prevent back flow of paste into the storage
container.
(d) The piston 11 is then twisted clockwise to close the
outlet port 15.
Because the chamber 22 is generally full before the piston 11 is pushed into the chamber, a measured dose of paste equal to the displacement volume is discharged through the outlet port 15. Provided that reasonable care is taken to ensure that the chamber 22 is substantially full and that the piston is fully displaced, then the volume of paste displaced should be uniform for each use.
Several modifications can be made to the basic closure. The piston could be spring loaded to its upper position for example by means of a helical compression spring.
The projection 14 could be formed on the piston sidewall 23 and the aperture 13 formed in the chamber sidewall 16.
Both the piston 11 and the body 16 can be formed of the same polymeric material or different polymeric materials. The upper shoulders 28 on the piston 11 could be serrated facilitating turning of the cap relative to the body 18.
The present application has been divided from U.K.
patent application 9506925.8 (GB-A-2,299,574) dated 4th
April 1995 which has claims directed to a closure for a container and to a paste container provided with such a closure.
Claims (8)
1. A closure for a container of paste or other viscous fluent material, which closure has a body with a variable volume chamber with an inlet port and an outlet port, the inlet port including a one-way valve for allowing paste to flow into the chamber, and a piston slidably mounted in the chamber so that in use relative movement of the piston into the chamber causes paste to egress through the outlet port, a sliding portion of the piston having an aperture therein which can be aligned with the outlet port during inward movement of the piston for expulsion of paste from the chamber in use.
2. A closure as claimed in claim 1, wherein the piston is reciprocably slidable within the chamber along a first axis to vary the volume of the chamber and the aperture is elongate in the direction of the first axis.
3. A closure as claimed in claim 2, wherein the piston is also turnable about said first axis relative to the chamber.
4. A closure as claimed in any one of claims 1 to 3, wherein the relative movement between the piston and the body is limited by a projection on one of the piston and body engaging in aperture means in the other of the piston and body.
5. A closure as claimed in claim 4, wherein the projection is on the piston and the aperture means is in the chamber sidewall.
6. A closure as claimed in claim 4 or claim 5, wherein the aperture means has the shape of an irregular quadrilateral.
7. A closure as claimed in any one of the preceding claims, wherein the body and one-way valve comprise a single integral moulded component.
8. A paste container including a container body having an opening which is closed by a closure as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9815424A GB2324297B (en) | 1995-04-04 | 1995-04-04 | Container closure |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9506925A GB2299574B (en) | 1995-04-04 | 1995-04-04 | Closure for a container |
| GB9815424A GB2324297B (en) | 1995-04-04 | 1995-04-04 | Container closure |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9815424D0 GB9815424D0 (en) | 1998-09-16 |
| GB2324297A true GB2324297A (en) | 1998-10-21 |
| GB2324297B GB2324297B (en) | 1999-03-10 |
Family
ID=10772474
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9815424A Expired - Fee Related GB2324297B (en) | 1995-04-04 | 1995-04-04 | Container closure |
| GB9506925A Expired - Fee Related GB2299574B (en) | 1995-04-04 | 1995-04-04 | Closure for a container |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9506925A Expired - Fee Related GB2299574B (en) | 1995-04-04 | 1995-04-04 | Closure for a container |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB2324297B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000066447A1 (en) * | 1999-05-04 | 2000-11-09 | Georg Menshen Gmbh & Co. Kg | Slotted closing valve for openings of containers |
| US8397957B2 (en) | 2010-01-06 | 2013-03-19 | Berry Plastics Corporation | Dispensing valve |
| US8608034B2 (en) | 2011-02-18 | 2013-12-17 | Berry Plastics Corporation | Dispensing valve |
| US9132440B2 (en) | 2010-07-26 | 2015-09-15 | Ecolab Usa Inc. | Metered dosing bottle |
| WO2020091984A1 (en) * | 2018-10-31 | 2020-05-07 | Dow Global Technologies Llc | Dosing cap with adjustable volume |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2376226A (en) * | 2001-06-08 | 2002-12-11 | Patrick James Shea | Dispensing device with contaminant guard |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4165824A (en) * | 1976-05-10 | 1979-08-28 | Sud Mohinder P | Self cleaning shampoo dispenser |
| GB2222637A (en) * | 1988-06-14 | 1990-03-14 | Schwan Stabilo Schwanhaeusser | Applicator device for a viscous material |
| GB2233049A (en) * | 1989-05-11 | 1991-01-02 | Bobrick Inc | A push-in fluid dispenser |
| US5184760A (en) * | 1991-10-11 | 1993-02-09 | Primary Delivery Systems, Inc. | Metered side dispensing cap for tubes |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB827778A (en) * | 1957-05-08 | 1960-02-10 | Newton Chambers & Co | An improved device for dispensing fluent materials |
| IT1110119B (en) * | 1978-05-10 | 1985-12-23 | Yamamoto Soichiro | TOOTHPASTE DISPENSER AND TOOTHPASTE CONTAINER FOR IT |
| NL8600111A (en) * | 1986-01-20 | 1987-08-17 | Bernardus Johannes Josephus Au | STOP FOR A CONTAINER, LIKE A BOTTLE AND A PUMP CONTAINABLE FOR SUCTION RESP. PRESSING GASEOUS MEDIUM FROM RESP. IN THE HOLDER. |
| GB2224320B (en) * | 1988-08-30 | 1993-02-17 | James White Loudon | Dispenser of semi-solid material onto a toothbrush. |
-
1995
- 1995-04-04 GB GB9815424A patent/GB2324297B/en not_active Expired - Fee Related
- 1995-04-04 GB GB9506925A patent/GB2299574B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4165824A (en) * | 1976-05-10 | 1979-08-28 | Sud Mohinder P | Self cleaning shampoo dispenser |
| GB2222637A (en) * | 1988-06-14 | 1990-03-14 | Schwan Stabilo Schwanhaeusser | Applicator device for a viscous material |
| GB2233049A (en) * | 1989-05-11 | 1991-01-02 | Bobrick Inc | A push-in fluid dispenser |
| US5184760A (en) * | 1991-10-11 | 1993-02-09 | Primary Delivery Systems, Inc. | Metered side dispensing cap for tubes |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000066447A1 (en) * | 1999-05-04 | 2000-11-09 | Georg Menshen Gmbh & Co. Kg | Slotted closing valve for openings of containers |
| US6450375B1 (en) | 1999-05-04 | 2002-09-17 | Georg Menshen Gmbh & Co. Kg | Slotted closing valve for openings of containers |
| US8397957B2 (en) | 2010-01-06 | 2013-03-19 | Berry Plastics Corporation | Dispensing valve |
| US8794489B2 (en) | 2010-01-06 | 2014-08-05 | Berry Plastics Corporation | Dispensing valve |
| US9132440B2 (en) | 2010-07-26 | 2015-09-15 | Ecolab Usa Inc. | Metered dosing bottle |
| US9731307B2 (en) | 2010-07-26 | 2017-08-15 | Ecolab Usa Inc. | Metered dosing bottle |
| US8608034B2 (en) | 2011-02-18 | 2013-12-17 | Berry Plastics Corporation | Dispensing valve |
| WO2020091984A1 (en) * | 2018-10-31 | 2020-05-07 | Dow Global Technologies Llc | Dosing cap with adjustable volume |
| US11448542B2 (en) | 2018-10-31 | 2022-09-20 | Dow Global Technologies Llc | Dosing cap with adjustable volume |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9506925D0 (en) | 1995-05-24 |
| GB2299574A (en) | 1996-10-09 |
| GB2324297B (en) | 1999-03-10 |
| GB9815424D0 (en) | 1998-09-16 |
| GB2299574B (en) | 1999-03-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20000404 |