GB1602189A - Dispensing devices - Google Patents

Dispensing devices Download PDF

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Publication number
GB1602189A
GB1602189A GB5105677A GB5105677A GB1602189A GB 1602189 A GB1602189 A GB 1602189A GB 5105677 A GB5105677 A GB 5105677A GB 5105677 A GB5105677 A GB 5105677A GB 1602189 A GB1602189 A GB 1602189A
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United Kingdom
Prior art keywords
cartridge
housing
nozzle
foil
thrust member
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
GB5105677A
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EASI PESI Ltd
Original Assignee
EASI PESI Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EASI PESI Ltd filed Critical EASI PESI Ltd
Priority to GB5105677A priority Critical patent/GB1602189A/en
Publication of GB1602189A publication Critical patent/GB1602189A/en
Expired legal-status Critical Current

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Classifications

    • 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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G19/00—Table service
    • A47G19/12—Vessels or pots for table use
    • A47G19/18—Containers for delivering jam, mustard, or the like
    • A47G19/183—Containers for delivering jam, mustard, or the like by applying external pressure, i.e. by pumping or squeezing
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K5/00—Holders or dispensers for soap, toothpaste, or the like
    • A47K5/06—Dispensers for soap
    • A47K5/12—Dispensers for soap for liquid or pasty soap
    • A47K5/1211—Dispensers for soap for liquid or pasty soap using pressure on soap, e.g. with piston

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Closures For Containers (AREA)

Description

(54) IMPROVEMENTS IN AND RELATING TO DISPENSING DEVICES (71) We, EESI-PESI LIMITED a British Company of Clavering Court, Clavering, Near Saffron Walden, Essex, 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 concerns dispensing devices by which liquid and paste-like substances can be dispensed.
The invention is particularly applicable to the dispensing of toothpaste but it is to be understood that the invention is not in any way limited to this particular application and can be used for dispensing any liquid or paste-like substance such as a liquid or paste-like adhesive or glue, liquid or paste-like foodstuff and decorating aids such as PolyEilla (Registered Trade Mark) and like substances.
It is an object of the present invention to provide an improved form of dispensing aid by which liquid or paste-like substances can be dispensed more readily than has hitherto been the case with conventional wrappings and dispensing techniques for such materials.
It is another object of the present invention to provide a dispensing aid by which liquid or paste-like substances can be dispensed and which will allow such substances to be sold in larger quantities than has hitherto been the case to facilitate so-called bulk buying thereby reducing distribution costs.
According to the present invention a dispensing aid comprises a dispensing device in combination with a sealed cartridge containing a liquid of past-like material to be dispensed, the dispensing device comprising a housing having a hollow interior adapted to receive a cartridge therein in a predetermined position, an outlet which communicates with the interior of the housing and through which liquid or past-like material from the cartridge can be forced under the action of a thrust member, which is displaceable through the cartridge when the latter is inserted in the housing to displace the contents on the cartridge-through the said outlet, and a member screw-threadedly engaged with the housing and axially displaceable relative thereto upon rotation relative to the housing, said member acting on said thrust member to produce the displacement thereof through the housing, and the sealed cartridge having a weak wall portion or portions adapted to be ruptured to permit passage of the thrust member through the cartridge and/or the exit of the liquid or paste-like material through the outlet.
Preferably the outlet includes a nozzle through which the liquid or paste-like substance passes when the thrust member is displaced through the housing and a passage communicates between the nozzle and the interior of the housing.
Preferably valve means is located either in the housing or the passage or the nozzle which normally prevents the liquid or paste-like substance from passing therethrough but can be overcome to allow the passage of the liquid or past-like substance therethrough upon exerting sufficient pressure on the contents of the cartridge by said thrust member.
Alternatively a cap is provided for closing off the end of the nozzle. The cap may be screw-threadedly engaged on the nozzle or may be a push fit thereon.
Alternatively the nozzle may be formed flush with a flat surface over which an apertured member is slideable from at least a first position in which a non-apertured region of the member covers the nozzle to at least a second position in which an aperture in the said member is at least partially aligned with the said nozzle to allow liquid or past-like substances to pass therethrough.Where the nozzle is formed flush in a cylindrical surface the sliding surface the sliding apertured member may comprise a cylindrical sleeve which is a close slipping fit around the said cylindrical surface having an aperture formed therein which in one position of the sleeve relative to the cylindrical surface coincides with the position of the nozzle in the said surface.
The housing may be adapted to rupture and form an aperture in a weak wall portion of a cartridge upon insertion of the cartridge into the housing. The resulting aperture being to permit exit of the contents of the cartridge through the outlet. This may conveniently be around the outlet which abutment may comprise a knife edge or spike or other upstanding protrusion which will penetrate an inserted end face of the cartridge and puncture the latter as the cartridge is pushed into the housing.
One preferred form of abutment comprises a conical protrusion having one or more apertures in the wall of the cone so that after piercing the inserted end of the cartridge the cone is pushed into the interior of the cartridge and the liquid or paste-like substance contained therein can pass through the aperture or apertures in the wall of the cone and into the outlet from the said housing.
In another embodiment the outlet from the housing is formed in the said thrust member and an opening in the end of the thrust member which acts on the cartridge within the housing is surrounded or has formed close thereto an abutment typically in the form of a circular cutting edge or a conical protrusion having one or more apertures in the wall of the cone for piercing the rear wall of the cartridge to allow the liquid or paste-like substance contained in the cartridge to pass into the passage through the thrust member and thence to the outlet.
Typically the end of the passage into said thrust member communicates with an outlet nozzle and either valve means is associated with the protrusion or abutment means or the passage or the nozzle or a cap is provided to prevent the exit of liquid or paste-like substance from the said outlet except when the contents of the cartridge are subjected to sufficient pressure upon appropriate rotational movement of the member acting on the thrust member.
The member acting on the thrust member may be formed integrally with the latter or the two may be formed separately and either a mechanicaljoint formed between the two parts or a simple abutting relationship is relied on for exerting thrust from the one member to the thrust member.
When the outlet for the liquid or paste-like substance is provided in the thrust member, direct contact between the contents of the cartridge and the end of the thrust member containing the inlet to the passage leading to the outlet is required. Consequently in this event the end of the cartridge which is acted on by the said thrust member is conveniently in the form of a membrane of foil or plastics sheet material which is capable of being pierced or cut away or otherwise removed at least in the region of the inlet to the said passage leading to the outlet.
Where the outlet communicates with the in serted end of the cartridge the end of the cartridge which is acted on by the thrust member may also be in the form of a membrane of foil or sheet plastics material which is severed by the action of the thrust member and pushed forward down the cartridge as the thrust member moves therethrough to displace the contents through the outlet or alternatively the end of the cartridge acted on by the thrust member may include a peripheral lip defining an aperture through which the thrust member can just pass and a plate member is located within the cartridge the dimensions of which are such that the plate is prevented from passing through the aperture defined by the said lip and the plate member is acted on by the thrust member and displaced with the thrust member through the cartridge as the contents thereof are displaced through the outlet of the housing. In this way direct contact between the conten is of the cartridge and the thrust member is substantially prevented.
By removing the direct contact between the thrust member and the contents of the cartridge so the need for strenuous cleaning of the thrust member when a spent cartridge is replaced by a full cartridge, is to a large extent eliminated.
The cartridge of a dispensing aid embodying the invention conveniently comprises a shell of rigid or substantially rigid material the crosssectional shape of which is commensurate with the internal cross-sectional shape of the housing and the dimensions of which are such as to allow the member acting on the thrust member to be screw-threadedly engaged with the housing to bring the thrust member into contact with the rear face of the cartridge in situ.The end of the cartridge which is to be inserted into the housing (herein referred to as the inserted end of the cartridge) may comprise a membrane of foil or sheet plastics material which is pierced by an abutment or cutting member located on the cooperating end face of the housing and situated close to or around the aperture leading to the outlet from the housing or alternatively the inserted end of the cartridge may include a tear-off strip which can be removed prior to the insertion of the cartridge into the housing to expose an aperture in the said end face which will register with an aperture in the cooperating end wall of the housing and through which the contents of the cartridge can be forced. Where a tear-off strip is provided, the inserted end of the cartridge need not necessarily be formed from a thin membrane of foil or sheet plastics material.
The rear end of the cartridge on which the thrust member acts may be in the form of a thin embrane formed for example from foil or sheet plsatics material which is severed by the thrust member as the latter is forced against the rear end of the cartridge or the rear end of the cartridge may be formed with a rigid peripheral lip defining an aperture through which the thrust member can fit and the contents of the cartridge are sealed therewithin by means of a plaet member the dimensions of which are such that it cannot pass through the aperture but can be pushed by the thrust mem ber through the housing to displace the con tents thereof. The plate member is typically formed from plastics or metal but may be formed from cardboard typically coated at least on the inner face by foil or the like.
The side wall of the cartridge may be formed from cardboard which may be coated on one or both faces with foil or the like or from plastics material or from metal.
Typically the housing is cylindrical and the interior thereof is circular in cross-section to receive a cylindrical cartridge and where a tearoff strip is provided on the inserted end face of the cartridge, alignment of the aperture formed by tearing off the strip is facilitated by situating the aperture in the end housing wall which leads to the outlet from the housing, centrally of the end housing wall and locating the aperture which is exposed by tearing off said tear-off strip centrally and the inserted end of the cartridge so that the exposed hole and the said aperture are automatically aligned as soon as the cartridge is inserted into the housing.
Where an abutment or other protrusion is formed on the end wall of the housing against which the inserted end of the cartridge abuts so as to pierce the end wall and form an aperture therein through which the contents of the cartridge can be forced under pressure, the thrust member is conveniently formed with a recess which registers with the said abutment or other protrusion when the thrust member is displaced fully through the interior of the housing so that the thrust member can be displaced virtually into contact with the interior end wall of the housing towards which it is moved as it is displaced through the housing so as to dispense as much of the contents of the cartridge as possible through the aperture leading to the exit from the housing.
Where the member which acts on the thrust member is itself in the form of a cylindrical cap the external surface of the said member may be decorated as by printing or painting and/or by having formed therein indentations and upstanding protrusions so as to form a pattern or representation of a face or figure or is otherwise embellished to produce an attractive-looking product particularly when the said member has been largely screwed down onto the said housing.
The invention will now be described by way of example with reference to the accompanying drawings in which: Figure 1 is a cross-section through a generally cylindrical dispensing aid embodying the invention, Figure 2 is a cross-section through the cylindrical cartridge of the dispensing aid as shown in Figure 1, Figure 3 is a cross-section through another cylindrical cartridge which may be fitted within the dispensing device shown in Figure 1, Figure 4 is an end view of a cylindrical cart ridge having a central aperture covered by a tear-off strip, and Figure 5 is a side view of another form of dispensing aid in which the exit is formed at the upper end of the cylindrical cap which is rotated to displace the contents of the cartridge situated therein.
In Figure 1 a dispensing aid is shown which includes a dispensing device comprising a base 10 having upstanding therefrom a cylindrical housing 12 within which a cartridge is fitted the wall of which is shown at14. A passage 16 through the base 10 communicates between a nozzle 18 closed by a screw-on cap 20 and an aperture in the lower end of the housing 12 which is covered by a conical protrusion 22 having apertures such as 24 through the conical wall to allow the contents 26 of the cartridge 14 to pass into the passage 16 and thence to the nozzle 18.
When not in use the nozzle 18 is covered by the screw-on cap 30 which is removed when some of the contents are to be dispensed by screwing down a cylindrical cap 28 which in turn acts on a thrust plate 30 at the lower end of an integral central strut 32, to displace the contents 26 below the plate 30 through the passage 16 and out through the nozzle 18.
Strengthening ribs such as 34 are provided between the strut 32 and the plate 30 and at the upper end of the strut 32 which is of circular cross-section and is hollow at least at the upper end is fitted to a central stub 36 of the upper end of the cap 28. As shown an annular depression is formed internally in the cylindrical strut 32 and a cooperating annular protrusion 38 around the stub 36 is received in the annular depression, the material from which the strut sleeve 32 and/or the stub 36 is formed being sufficiently resilient to allow the strut sleeve 32 to be pushed onto the stub 36.
As shown the exterior of the cylindrical housing 12 is formed with a screw-thread profile 40 and a complementary screw-thread profile 42 is formed on the inside surface of the cylindrical cap 28.
Rubber suckers such as denoted by 44 and 46 are provided on the underside of the base 10 to assist in stabilising the base on a shiny surface such as a porcelain hand-basin or bathroom window-sill.
The external surface of the cap 28 may be decorated or embellished, printed, painted or otherwise formed with a representation of a face or figure or words or other symbols to produce an attractive consumer product.
As shown in Figure 1, the cartridge is a cylindrical walled member the upper and lower ends of which are covered by foil and Figure 2 illustrates this form of cartridge in more detail.
The cylindrical wall 14 is typically formed from a ring of cardboard the intemal surface of which is lined with a layer of foil 48. A circular disc of foil 50 is fitted over the upper end and a similar circulat disc of foil 50 is fitted over the lower end and the periphery of each disc is sealed as by gluing or bonding to the outer surface of the cardboard ring 14. The sheet of foil 50 is broken by the action of the thrust plate 30 as it is pushed against the upper surface of the foil sheet 50 and the conical pro trusion 22 pierces the centre of the lower foil sheet 52 when the cartridge is first pushed into the interior of the housing 12.
To avoid the necessity of applying foil to both ends of the cylinder 14, an alternative form of construction may be used for the cartridge as shown in Figure 3. Here the cylindrical wall 14 of the previous embodiment is replaced by a cylindrical member 54 the upper end of which has a reduced diameter opening defined by an annular lip 56. A rigid plate 58 typically of cardboard lined on its inner surface 60 by a sheet of foil as is the internal surface 62 of the cylindrical wall 54 is located at the upper end of the cartridge (when located within the cylindrical housing 12) and the lower end of the cartridge is covered by a foil sheet 52 in the same way as described with reference to Figure 2.The cartridge shown in Figure 3 is most simply filled by inverting the empty cylinder 54 relative to the position shown in Figure 3 and dropping the disc 58 into the cylinder so that it rests on the annular lip 56. The interior of the cylindrical housing can then be filled from a nozzle (not shown) located above the open end of the cylinder and when filled the open end can be covered by the foil sheet 52.
Preferably the cartridge is marked so as to indicate which end should be inserted into the cylindrical housing 12.
The thickness of the foil must necessarily represent a compromise between a thin sheet which can readily be pierced and a thick sheet which will provide a high level of protection from accidental damage during storage etc.
To reduce the risk of damage the foil may either be reinforced except over the central region or in place of the sheet of foil 52, the inserted end of the cartridge may be formed from a disc of cardboard or other material which may be coated on the inside with foil and which has a central aperture which is normally covered by a thin sheet of foil which can be pierced by the protrusion 22 or is covered by a thicker sheet of foil which can be torn off and removed from the disc before the cartridge is inserted into the housing 12. Figure 3 illustrates a tear-off disc of foil or like material designated by reference numeral 64 which covers the central aperture shown in dotted outline at 66 in a cardboard disc 68 the internal surface of which is covered by a sheet of foil or like material (not shown).The tear-off disc 64 includes an integral tag 70 by which the disc can be gripped and pulled off to expose the aperture 66.
In Figure 5 an alternative embodiment is shown comprising a base 72 having upstanding cylindrical housing 74 which like housing 12 is externally formed with a screw thread 76 for engaging a complementary screw thread (not shown) formed on the inside surface of a cylindrical cap 78 which is internally joined to a thrust plate 80 in exactly the same way as the cap 28 is secured to the thrust plate 30 in Figure 1. The difference lies in the provision of a central aperture in the plate 80 which communicates with the hollow interior of the central strut 32 joining the plate 80 to the upper end of the cap 78 and the provision of a passage through the stub and the end of the cap 78 to allow a liquid or paste-like material below the thrust plate 80 to pass up and out of a nozzle 82 situated centrally of the end of the cap 78.
The passage through the stub and cap end is denoted by reference numeral 84.
A closure member 86 is adapted to be fitted to the nozzle 82 to prevent the ingress of air and dirt.
The cylindrical wall of the cartridge is indicated by reference numeral 88 and the contents of the cartridge are dispensed by turning the cap 78 so that it is moved in a downward direction thereby forcing the contents of the cartridge up the central passage to emerge from the nozzle 82.
Where a cartridge having foil at both ends as shown in Figure 2 is employed then it does not matter which end of the cartridge is inserted first. Where however only one end is covered by foil or one end of the cartridge includes a central aperture which is covered by foil or by a tear-off strip the cartridge must be inserted into the cylindrical housing 74 exactly the opposite manner to which it would be inserted in the Figure 1 embodiment.
The embodiment shown in Figure 5 obviates the need for a passage through the base 72 but is really only applicable to dispensing materials which are in a thick paste form and which will be forced from the nozzle 82 in the form of a self-supporting column such as will be produced by a conventional toothpaste tube when squeezed so that after an appropriate length of column of self-supporting paste has been forced from the nozzle 82 it can be removed by intercepting it with a brush or the like. Altematively the nozzle 82 may be extended to form a dish around the opening feeding the nozzle so that as the contents of the cartridge are forced through the aperture they spill out into the dish around the aperture and can be removed therefrom. Whatever form of nozzle is used however it is important that the end of the nozzle or the open end of the dish surrounding the aperture in the nozzle shall be covered by a closure member such as a cap 86 except when the device is used to dispense the contents of the cartridge.
Conveniently the base and upstanding cylindrical housing, the cylindrical cap and thrust plate and strut for joining the latter to the end cap are all formed from plastics material preferably injection moulded.
WHAT WE CLAIM IS: 1. A dispensing aid comprising a dispensing device in combination with a sealed cartridge containing a liquid or paste-like material to be dispensed, the dispensing device comprising a housing having a hollow interior adapted to re
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (19)

**WARNING** start of CLMS field may overlap end of DESC **. trusion 22 pierces the centre of the lower foil sheet 52 when the cartridge is first pushed into the interior of the housing 12. To avoid the necessity of applying foil to both ends of the cylinder 14, an alternative form of construction may be used for the cartridge as shown in Figure 3. Here the cylindrical wall 14 of the previous embodiment is replaced by a cylindrical member 54 the upper end of which has a reduced diameter opening defined by an annular lip 56. A rigid plate 58 typically of cardboard lined on its inner surface 60 by a sheet of foil as is the internal surface 62 of the cylindrical wall 54 is located at the upper end of the cartridge (when located within the cylindrical housing 12) and the lower end of the cartridge is covered by a foil sheet 52 in the same way as described with reference to Figure 2.The cartridge shown in Figure 3 is most simply filled by inverting the empty cylinder 54 relative to the position shown in Figure 3 and dropping the disc 58 into the cylinder so that it rests on the annular lip 56. The interior of the cylindrical housing can then be filled from a nozzle (not shown) located above the open end of the cylinder and when filled the open end can be covered by the foil sheet 52. Preferably the cartridge is marked so as to indicate which end should be inserted into the cylindrical housing 12. The thickness of the foil must necessarily represent a compromise between a thin sheet which can readily be pierced and a thick sheet which will provide a high level of protection from accidental damage during storage etc. To reduce the risk of damage the foil may either be reinforced except over the central region or in place of the sheet of foil 52, the inserted end of the cartridge may be formed from a disc of cardboard or other material which may be coated on the inside with foil and which has a central aperture which is normally covered by a thin sheet of foil which can be pierced by the protrusion 22 or is covered by a thicker sheet of foil which can be torn off and removed from the disc before the cartridge is inserted into the housing 12. Figure 3 illustrates a tear-off disc of foil or like material designated by reference numeral 64 which covers the central aperture shown in dotted outline at 66 in a cardboard disc 68 the internal surface of which is covered by a sheet of foil or like material (not shown).The tear-off disc 64 includes an integral tag 70 by which the disc can be gripped and pulled off to expose the aperture 66. In Figure 5 an alternative embodiment is shown comprising a base 72 having upstanding cylindrical housing 74 which like housing 12 is externally formed with a screw thread 76 for engaging a complementary screw thread (not shown) formed on the inside surface of a cylindrical cap 78 which is internally joined to a thrust plate 80 in exactly the same way as the cap 28 is secured to the thrust plate 30 in Figure 1. The difference lies in the provision of a central aperture in the plate 80 which communicates with the hollow interior of the central strut 32 joining the plate 80 to the upper end of the cap 78 and the provision of a passage through the stub and the end of the cap 78 to allow a liquid or paste-like material below the thrust plate 80 to pass up and out of a nozzle 82 situated centrally of the end of the cap 78. The passage through the stub and cap end is denoted by reference numeral 84. A closure member 86 is adapted to be fitted to the nozzle 82 to prevent the ingress of air and dirt. The cylindrical wall of the cartridge is indicated by reference numeral 88 and the contents of the cartridge are dispensed by turning the cap 78 so that it is moved in a downward direction thereby forcing the contents of the cartridge up the central passage to emerge from the nozzle 82. Where a cartridge having foil at both ends as shown in Figure 2 is employed then it does not matter which end of the cartridge is inserted first. Where however only one end is covered by foil or one end of the cartridge includes a central aperture which is covered by foil or by a tear-off strip the cartridge must be inserted into the cylindrical housing 74 exactly the opposite manner to which it would be inserted in the Figure 1 embodiment. The embodiment shown in Figure 5 obviates the need for a passage through the base 72 but is really only applicable to dispensing materials which are in a thick paste form and which will be forced from the nozzle 82 in the form of a self-supporting column such as will be produced by a conventional toothpaste tube when squeezed so that after an appropriate length of column of self-supporting paste has been forced from the nozzle 82 it can be removed by intercepting it with a brush or the like. Altematively the nozzle 82 may be extended to form a dish around the opening feeding the nozzle so that as the contents of the cartridge are forced through the aperture they spill out into the dish around the aperture and can be removed therefrom.Whatever form of nozzle is used however it is important that the end of the nozzle or the open end of the dish surrounding the aperture in the nozzle shall be covered by a closure member such as a cap 86 except when the device is used to dispense the contents of the cartridge. Conveniently the base and upstanding cylindrical housing, the cylindrical cap and thrust plate and strut for joining the latter to the end cap are all formed from plastics material preferably injection moulded. WHAT WE CLAIM IS:
1. A dispensing aid comprising a dispensing device in combination with a sealed cartridge containing a liquid or paste-like material to be dispensed, the dispensing device comprising a housing having a hollow interior adapted to re
ceive a cartridge therein in a predetermined position, an outlet which communicates with the interior of the housing and through which liquid or paste-like material from the cartridge can be forced under the action of a thrust member, which is displaceable through the cartridge when the latter is inserted in the housing to displace the contents of the cartridge through the said outlet, and a member screw-threadedly engaged with the housing and axially displaceable relative thereto upon rotation relative to the housing, said member acting on said thrust member to produce the displacement thereof through the housing, and the sealed cartridge having a weak wall portion or portions adapted to be ruptured to permit passage of the thrust member through the cartridge and/or the exit of the liquid or paste-like material through the outlet.
2. Dispensing aid as claimed in Claim 1 in which the outlet includes a nozzle through which the liquid or paste-like substance passes when the thrust member is displaced through the housing and a passage communicates between the nozzle and the interior of the housing.
3. Dispensing aid as claimed in Claim 2 in which valve means is located either in the housing or the passage or the nozzle which is normally closed to prevent the liquid or paste-like substance from passing therethrough but can be opened to allow the passage of the liquid or paste-like substance therethrough upon exerting sufficient pressure on the contents of the cartridge by said thrust member.
4. Dispensing aid as claimed in Claim 2 in which a cap is provided for closing off the end of the nozzle.
5. Dispensing aid as claimed in Claim 4 in which the cap is either screw-threadedly engaged on the onzzle or is a push fit thereon.
6. Dispensing aid as claimed in Claim 2 in which the nozzle is formed flush with a flat surface over which an apertured member is slideable from at least a first position in which a non-apertured region of the member covers the nozzle to at least a second position in which an aperture in the said member is at least partially aligned with the said nozzle to allow the liquid or paste-like substance to pass therethrough.
7. Dispensing aid as claimed in Claim 6 in which the nozzle is formed flush in a cylindrical surface and the sliding apertured member comprises a cylindrical sleeve which is a close slipping fit around the said cylindrical surface and has an aperture formed therein which when the cylindrical apertured member occupies one position relative to the cylindrical surface coin cides with the nozzle in the said surface.
8. Dispensing aid as claimed in any of the preceding Claims in which the housing is adapted to rupture and form an aperture in a weak wall portion of a cartridge upon insertion of the cartridge into the housing, the resulting aperture being to permit exit of the contents of the cartridge through the outlet.
9. Dispensing aid as claimed in Claim 8 in which an abutment is provided near or around the outlet which will penetrate an inserted end face of the cartridge and puncture the latter as the cartridge is pushed into the housing.
10. Dispensing aid as claimed in Claim 9 in which the abutment comprises a hollow conical protrusion having at least one aperture in the wall of the cone so that after piercing the inserted end of the cartridge, the cone is pushed into the interior of the cartridge and the liquid or paste-like substance contained therein can pass through the said at least one aperture in the wall of the cone and from thence into the outlet from the said housing.
11. Dispensing aid as claimed in Claim 8 in which the outlet from the housing is formed in the said thrust member in the form of a passage therethrough and an opening in the end of the thrust member which acts on the cartridge within the housing, is surrounded or has formed close thereto a hollow abutment having one or more apertures in the wall thereof for piercing the rear wall of the cartridge to allow the liquid or paste-like substance contained in the cartridge to pass into the hollow interior of the abutment and thence into the passage through the thrust member and to the outlet.
12. Dispensing aid as claimed in any of the preceding Claims in which a member acting on the thrust member is formed integrally therewith.
13. Dispensing aid as claimed in any of Claims 1 to 11 in which a member acting on the thrust member is formed separately from the thrust member and a mechanical joint is formed between the two parts.
14. Dispensing aid as claimed in Claim 11 in which that end of the cartridge which is acted on by the said thrust member is formed by a membrance of sheet material which is capable of being pierced or cut away or otherwise removed at least in the region of the inlet to the said passage leading to the outlet.
15. Dispensing aid as claimed in Claim 9 or 10 in which that end of the cartridge which is acted on by the thrust member is in the form of a membrane of sheet material which is severed by the action of the thrust member and pushed forward down the cartridge as the thrust member moves forward to displace the contents through the outlet.
16. Dispensing aid as claimed in Claim 9 or 10 in which that end of the cartridge acted on by the thrust member includes a peripheral lip defining an aperture through which the thrust member can just pass and a plate member is located within the cartridge which is of a diameter such that it is prevented from passing rearwardly through the aperture defined by the said peripheral lip and the plate member is acted on by the thrust member and displaced with the thrust member through the cartridge as the contents thereof are displaced through the oultet of the housing thereby obviating direct contact between the contents of the cartridge and the thrust member.
17. Dispensing aid as claimed in Claim 9 or 10 in which the thrust member is formed with a recess which registers with the abutment on the cooperating end face of the housing and accommodates the abutment when the thrust member is displaced fully through the interior of the housing, so that the thrust member can be displaced virtually into contact with the cooperating end wall of the housing towards which it is moved so as to dispense as much of the contents of the cartridge as possible.
18. Dispensing aid as claimed in any of the preceding Claims in which the cartridge and the interior of the housing are cylindrical.
19. Dispensing aid constructed arranged and adapted to operate substantially as herein described with reference to and as illustrated in the accompanying drawings.
GB5105677A 1977-12-08 1977-12-08 Dispensing devices Expired GB1602189A (en)

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Application Number Priority Date Filing Date Title
GB5105677A GB1602189A (en) 1977-12-08 1977-12-08 Dispensing devices

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Application Number Priority Date Filing Date Title
GB5105677A GB1602189A (en) 1977-12-08 1977-12-08 Dispensing devices
GB1365478 1978-04-07

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GB1602189A true GB1602189A (en) 1981-11-11

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173862A (en) * 1985-04-17 1986-10-22 Wool Dev Int Fluid dispensing cartridge
GB2226855A (en) * 1988-12-05 1990-07-11 Vick Steve Ltd Sealant applicator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173862A (en) * 1985-04-17 1986-10-22 Wool Dev Int Fluid dispensing cartridge
GB2226855A (en) * 1988-12-05 1990-07-11 Vick Steve Ltd Sealant applicator
GB2226855B (en) * 1988-12-05 1992-08-26 Vick Steve Ltd Sealant applicator

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