US3468458A - Devices for dispensing paste-like materials - Google Patents

Description

Sept. 23, 1969 s. LEIGH DEVICES FOR DISPENSING PASTE -LIKE MATERIALS Filed April 17, 1967 United States Patent 3,468,458 DEVICES FOR DISPENSING PASTE-LIKE MATERIALS Steven Leigh, 9 Emanuel Ave., London, W.3, England Filed Apr. 17, 1967, Ser. No. 631,406

Claims priority, application Great Britain, Apr. 28, 1966,

18,699/ 66 Int. Cl. B65d 35/22 US. or. 222-94 8 Claims ABSTRACT OF THE DISCLOSURE An attachment for a dispensing tube of paste, for delivering two paste materials, the one forming a core inside the other. The attachment fits the nozzle of a tube dispensing the outer paste material, has an inner,

This invention relates to devices for dispensing pastelike materials.

The object of the invention is to provide a device for attachment to a dispenser of a paste-like material, particularly to the familiar type of screw-top, collapsible paste tube, for carrying a charge of a second paste-like material and for delivering the two simultaneously in a single, cored stream.

Accordingly, the invention provides a device comprising inner and outer parts, the outer part having an input end adapted for attachment to a dispenser of a first pastelike material and an output stream-forming orifice, the inner part providing a chamber for charging with the second paste-like material and having a core-forming orifice aligned with said stream-forming orifice, the inner and outer parts defining a passageway therebetween for said first paste-like material extending from said input and to said stream-forming orifice.

One use of the invention is to dispense materials which are chemically incompatible. One such material is thus provided in the first paste and the other in the second paste. The two are not then mixed together and are combined only when required for use.

Another use is to dispense a core of active material in an inert carrier. The active material is charged in the device of the invention and the inert paste is provided in the tube to which the device is attached.

In either case, the chamber is charged with the second paste prior to use. It is thus convenient, according to a preferred form of the invention, to provide closures for the device at both input and output ends.

In order that the invention may readily be carried into practice, one embodiment will now be described in detail, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a perspective view of a device according to the invention, with top and bottom closures;

FIG. 2 is an axial section of the device of FIG. 1 in the plane II]I of FIG. 3;

FIG. 3 is a cross section of the device of FIG. 2 in the plane lIIIII; and

FIG. 4 is a view of the device, in axial section as in FIG. 2, but uncapped and fitted on to a paste dispenser ready for use.

As shown in FIG. 1, the device comprises an outer shell body part 1, fitted with a lower collar 2, having a top closure cap 3 and a bottom closure plug 4.

I Patented Sept. 23, 1969 As shown in the section views of FIGS. 2, 3 and 4, the outer part of the device comprises the shell 1, which is provided at its top with a stream-forming orifice 5 and which is partially closed at the bottom by the collar 2. The collar 2 has a reduced part 7 which fits internally of the skirt portion 6 of shell 1.

As shown also in the section views of FIGS. 2, 3 and 4, the shell 1 receives an inner part 8, which is located against the inner face of the shell 1 by three peripherallyspaced lands 9. The lands 9 thus position the inner part 8 to form an annular passage 12 extending around the inner part 8, from the lower end of the device to the stream-forming orifice 5.

The inner part 8 provides a chamber 13, which is charged with the second paste material, as shown in the section views. The bottom end of the inner part 8 is open at 10, where it faces the inlet opening of the device. The upper end of the inner part 8 is tapered to a core-forming orifice 11, which is coaxial with and is located below the stream-forming orifice 5.

In the example shown in the drawings, the inlet end of the device is adapted to fit the screw type nozzle 14 of a collapsible paste dispensing tube 15, to which it is shown attachedin FIG. 4. I

Accordingly, in this embodiment, the collar 2 is provided with a corresponding internally-threaded input opening 16, see FIG. 2.

The closure plug 4 is provided with a corresponding externally-threaded part 17.

Prior to use, the device of FIG. 1 is assembled and the chamber 13 charged with the required amount of the core paste material. The top and bottom closures are then secured until the device is required for use. When required, the closures are removed and the device fitted to a paste dispenser, as shown in FIG. 4.

When paste is expressed from the tube 15, it passes by the passageway 12 to the stream-forming orifice 5. At the same time, it exerts a pressure at the opening 10', against the second paste in the chamber 13, causing the second paste to be expelled from the core-forming orifice 11. The core of the second paste is surrounded by the first paste at the top of the passageway 12 and the two issue together from the orifice 5 as a single, cored stream.

For convenience in handling and fitting, the body part 1 is fluted at 18, the collar 2 has hexagonal faces at 19 and the plug closure 4 is knurled at 20.

The proportion of core material dispensed depends mainly upon the size of the core-forming orifice 11 in relation to the size of the stream-forming orifice 5 and, to a lesser extent, upon the size of the opening 10. By determining the dimensions of the device, the proportion of core material to outer stream material can be controlled.

The overall size of the device may depend upon the size of the paste dispensing tube 15 and the quantity of second paste to be dispensed with it. Alternatively, several charges may be dispensed consecutively.

The device may be moulded, in its separate parts, from thermoplastic material or it may be made partly or wholly of metal.

The term paste used herein includes paste-like materials, such as creams or gels.

What I claim is:

1. A device for simultaneously delivering a first pastelike material and a second, different paste-like material in a single cored stream comprising an outer member comprising an input end for providing attachment to a dispenser of the first paste-like material and an output orifice for forming a shell of the first paste-like material, and an inner member providing an inner chamber for receiving a charge of second paste-like material, said inner member including means defining an orifice communicating with said chamber and aligned axially with the shell forming orifice for forming a core of the second pastelike material, the second paste-like material being discharged through said core-forming orifice by said first paste-like material, the outer surface of said inner member orifice defining means being positioned relative to the inner surface of said output orifice such that an extension of said outer surface of said inner member orifice defining means is spaced from said inner surface of said output orifice and said inner member and said outer member defining a continuous aperture therebetween at the discharge end of the shell-forming orifice such that the shell-forming orifice forms a shell of the first paste-like material about a core of the second paste-like material.

2. A device as claimed in claim 1 wherein said inner and outer members are coaxial, said inner member including longitudinal lands for locating said inner member within said outer member, said lands being spaced from the continuous aperture formed at the discharge end of the shell-forming orifice.

3. A device as claimed in claim 2 wherein said outer member comprises a shell having an opening at the end thereof opposite said shell-forming orifice large enough to receive said inner member in the assembly of the device, said device further comprising a collar member which reduces the size of said opening, said collar member retaining said inner member in position and being adapted for attachment to the paste dispenser.

4. A device as claimed in claim 1 wherein the crosssectional area of the shell-forming orifice is greater than the cross-sectional area of the core-forming orifice such that said device dispenses a shell providing a major volume of the first paste-like material about a core of a minor volume of the second paste-like material.

5. A device as claimed in claim 1, having a removable cap for closing the shell-forming orifice.

6. A device as claimed in claim 5 having a removable cap for closing both the shell-forming and core-forming orifices.

7. A device as claimed in claim 1, having a removable closure for said input end of the outer part.

8. A device as claimed in claim 7, for attachment to an externally threaded nozzle type collapsible paste dispensing tube, further including a correspondingly internally threaded input end and an externally threaded plug closure.

References Cited UNITED STATES PATENTS 3,135,428 6/1964 Gallo 222-94 3,152,731 10/1964 Prussack 222-94 X 3,182,860 5/1965 Gallo ZZZ-94 X STANLEY H. TOLLBERG, Primary Examiner

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