|Publication number||US3043424 A|
|Publication date||Jul 10, 1962|
|Filing date||Aug 13, 1959|
|Priority date||Aug 13, 1959|
|Publication number||US 3043424 A, US 3043424A, US-A-3043424, US3043424 A, US3043424A|
|Inventors||Gordon Howard Frederick|
|Original Assignee||Sealanco Ltd|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (4), Referenced by (17), Classifications (17)|
|External Links: USPTO, USPTO Assignment, Espacenet|
July 10, 1962 F. e. HOWARD CONTAINERS FOR MASTIC MATERIALS AND TO MEANS FOR MIXING THE CONTENTS THEREOF Filed Aug. 15, 1959 u Fra/ar r. K GorJaa %u-r-J I Attorneys m [N I/ tinned States Patent CONTAINERS FOR MASTIC MATERIALS AND TO MEANS FOR MIXING THE CONTENTS THEREOF Frederick Gordon Howard, Ormskirk, England,
assignor to Sealanco Limited Filed Aug. 13, 1959, Ser. No. 833,458 Claims. (Cl. 206-47) This invention relates broadly to containers for materials that must be mixed together when they are to be used but must not be mixed prematurely, and to methods of mixing such materials.
It is sometimes necessary to charge a container with a material with which a second material must be mixed before use, but which should not come into contact with the second material until just before use. Examples of such materials are an expoxide resin and an amine catalyst or activator for it, and a Thio-kol compound and a peroxide activator for it.
Commonly the two materials are sent to the place of use in separate containers, and are removed from the containers and mixed together when required.
Particularly when the first material is a caulking compound, e.g. a Thiokol compound, it is very convenient to market it in a cylindrical cartridge which can be put in an extrusion gun. This can be done if the second material, e.g. the activator for the Thiokol compound, is put in an inner rupturable tube, and this inner tube is destroyed in situ by a bladed device also put in the outer container and operated from outside when the materials are to be mixed. The bladed device mixes the materials as Well as rupturing the tube, but it leaves the tube in the outer container or cartridge. This tube or fragments of it often hinder the extrusion of the mixed materials from the cartridge, or some fragments may be extruded with the mixed materials. Moreover the presence of the bladed device in the cartridge prevents the cartridge from being completely emptied.
An object of the invention is to provide a container for one material with an inner tube for a second material such that the two materials can be readily mixed.
Another object is to provide a noveland useful method of mixing two materials.
According to this invention the advantages of storing the second material in a tube in a cartridge or other elongated container of the first material are retained without the disadvantages set forth above. Broadly this is done by making a small opening in one end of the container, causing an unfilled neck of the tube to project through this opening and so closing the inner end of the tube as to render it easily openable, so that on pulling the projecting end of the tube pressure is exerted on the contents, the inner end is opened and the tube is removed through the opening while its contents are discharged into the material within the container.
The tube should extend over the whole length of the container so that its contents, which of course remain substantially unchanged in position as the tube is pulled out, will be uniformly distributed throughout the length of the container.
The tube may be of nylon or other plastic, and of course the 'Whole of its contents lie inside the container. Its projecting neck may be doubled on itself to form a loop by which it may be gripped, or a ring or device which may easily be gripped may be secured to the projecting neck. Again the tube may be closed immediately inside the end of the container, and the projecting neck may be formed by a tab secured to the tube and passing through the small opening. This opening may in any case advantageously be a slit.
The inner end of the tube may be closed by being doubled on itself; or by a thin tape or adhesive; or if ice the container is a cartridge with a piston-like base through which pressure for extrusion is applied, by trapping the end of the tube between the base and the cartridge.
The preferred form of container for a Thiokol compound and the method of mixing its contents will now be described by Way of example with reference to the accompanying drawings, in which:
FIG. 1 is a longitudinal section through the container;
FIG. 2 is an end view of the container;
FIG. 3 is a similar section taken during the removal of the tube; I
FIG. 4 shows the mixing of the materials after the removal of the tube; and
FIG. 5 shows the container ready for insertion in an extrusion gun.
The container shown generally at 10 comprises a cylindrical cartridge of strong cardboard lined with foil. One end of the container is closed by a cap 12 which makes a tight fit on the outside of the container and which has a slit 13 in it. The other end of the container is closed by a piston-like base 17 with a flange 16'.
In initially charging the container a tube 14 open at both ends and formed by cutting an appropriate length from a continuous extruded tube of nylon is filled with an activator 6 for a Thiokol compound and put in the container 10. The charge of activator does not extend quite to either end of the tube, and the lower end of the tube is flattened and trapped between the flange 16 and the wall of the container 10. Next the container 10 is charged with the Thiokol compound as shown at 7 so that the filled tube 14 lies wholly embedded within this compound. The cap 12 is now put in position and the unfilled outer end of the tube 14 is passed through the slit 13 and doubled on itself, being stapled by a staple 5 to form a loop 18. The charged container can now be stored indefinitely without danger of the activator coming into contact With the Thiokol compound.
When the container is to be used the loop 18 is gripped and pulled while the cap 12 is manually held in position if it tends to pull off the container. The result is that the filled part of the tube 14 comes into contact with the inner surface of the cap 12 and pressure is exerted on the activator in the tube. At the same time the trapped inner end of the tube is pulled out from the nip between the container and the flange 16 and as the tube continues to be pulled out the contents are discharged, being left behind in the Thiokol compound, as shown at 15 in FIGURE 3.
When the tube has been completely removed the next step is to mix the activator and the Thiokol compound. First the cap 12 is removed, and the whole container is put in a stand 30. This stand consists of a metal tube 24 integral with a fiat base 26. The mixing is done by means of a mixing device 32 comprising a rod 20 and i a bladed disc 21. The rod 20 is passed through a metal cap 25 which has internal helical flights 33 that engage beneath external complementary flights 35 on the tube 24. The cap 25 also includes a sleeve 31 which forms a bearing and guide for the rod 20. The cap is put in position so that the blade 21 makes contact with the top of the Thiokol compound inside the cartridge 10, and then is turned to engage the flights. The outer end of the rod 20 is engaged in a chuck of a manually or electrically operated brace 34 and on turning the brace and applying pressure as usual, the bladed disc 21 is both turned and advanced through the contents of the cartridge 10, thoroughly mixing them. When the mixing is complete the mixer is Withdrawn by rotation and axial movement in the opposite direction. Thereupon the cap 25 is unscrewed and removed together with the mixing device 32.
During the mixing it is desirable not to rotate the disc 21 at a speed .greater than 500 r.p.m., since otherwise the heat generated might cause the Thiokol compound to cure prematurely.
The operator can conveniently put both feet on the flat base 26 of the stand during the mixing and thus prevent the stand from turning. The dimensions of the stand and of the cartridge 10 may conveniently be such that the cap 25 grips the end of the cartridge frictionally and firmly to prevent the cartridge turning Within the stand during the mixing.
Finally a third cap 27 having a nozzle 36 is put over the end of the cartridge 10 and the latter is then ready for insertion in an extrusion gun by Which stepwise pressure can be exerted on the base 17 to force the contents out through the nozzle 36.
1. A package comprising a closed container charged with a viscous material to be mixed with a second material before use and having a small opening in-one end and a deformable tube of substantially uniform crosssection containing the second material and housed in the container and extending substantially through the entire length of the container, the tube being closed but readily openable at its inner end and having an unfilled extension projecting through said opening substantially filling and closing said opening, said opening having a crosssection materially less than that of the filled portion of the tube Within the container, whereby on pulling the projecting extension of the tube pressure is exerted on the contents, the inner end is opened and the tube is removed through the opening While its contents are discharged substantially uniformly into the material throughout its entire length within the container.
2 A package according to claim 1 in which the extension is formed by a flattened and unfilled end of the tube.
3. A package according to claim 1 in Which said container is provided with a removable base to close the end of the container opposite the end containing the small opening and the closed inner end of the tube is trapped between the Wall of the container and the removable base.
4. A package according to claim 1 in which said container has a removable cap and said opening is a slit in such cap.
5. A method of mixing a viscous material with a second material comprising charging a deformable tube of substantially uniform cross-section with the second material, inserting the filled tube in a container for the viscous material with the inner end of the tube closed but readily openable so as to extend substantially through the entire length of the container, filling the remainder of the container with the viscous material, passing an unfilled neck of the tube through a small opening in a cap, said opening having a cross-section materially less than that of the filled portion of the tube, closing the container by the cap, pulling out the tube through the opening While leaving the material charged therein distributed uniformly substantially throughout the entire length of the container in the container, and mixing the two materials Within the container.
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|U.S. Classification||366/150.1, 366/325.1, 206/219, 366/244|
|International Classification||B05C17/005, B05C17/01, B65D81/32, F16K41/10, F16K41/00|
|Cooperative Classification||B05C17/00553, F16K41/10, B05C17/01, B65D81/3238|
|European Classification||B05C17/005F, B65D81/32D1, F16K41/10, B05C17/01|