AU616692B2

AU616692B2 - Improved cartridge

Info

Publication number: AU616692B2
Application number: AU24930/88A
Authority: AU
Inventors: John Schott
Original assignee: Fosroc International Ltd
Current assignee: Fosroc International Ltd
Priority date: 1987-11-19
Filing date: 1988-11-09
Publication date: 1991-11-07
Anticipated expiration: 2008-11-09
Also published as: AU2493088A

Description

I: 616692 COMMONWEALTH OF AUSTRALIA Patents Act 1952 CO MPLETE SPECIFICATION

(ORIGINAL)

Class Int. Class 0S*O 0

SO

0 505e 6

C..

00 s

R

S

j Rese 5* Application Number Lodged Complete Specification Lodged Accepted Published RA11 Priority Related Art Sl KI 4' 7% 1 4. 1 M"T~vlnm r YMTM Address of Applicant Actual Inventor Address for Service Complete Specification for the Invention entitled: The following statement is a invention including the best us:- AT$-S" tAc WI~ch401%j, 81;P-e4s^ V" 4V9%ANed jC4 4.A-14 Vn.*"d n 0 11- N ew--8 e-sh-Wa4-2.-54; C-remontwea4~-h-a-Mas-t-r-ad-i John Schott e9 K-i N-r-eo-.

-teib ade -Mar-k-*r eys 2A-A-1-fred--S-teet M'TTSONS O-I-NT-NSW-2-6-1 1' I "Improved Cartridge" full description of this method of performing it known to SOO3486 THIS INVENT are used fc example an 'ION relates to cartridge's, such as cartridges that ,r securing a fixed element in a substrate, for anchor bolt in a rock bore hole.

I Cartridges for securing a fixed element in a substrate have been known for some time, for example from our Australian patent specification No 46427/85. Thus, it is known to Sprovide a cartridge formed of a flexible or semi-flexible Sfilm material and which includes or incorporates a plurality (preferably two) chambers separated by an inner wall or 10 diapihagm. One chamber usually contains a resin substance and the other chamber a catalyst. The cartridges once formed are generally elongate in formation and are secured at each end.

In use, they are inserted into a rock bore hole or the like and the bolt is extended into the hole thereafter. The bolt S *'15 comes into contact with and bursts or breaks open the cartridge, whereupon the catalyst and resin react together to form a bonding agent which goes towards holding or bonding see* the bolt within the bore hole. Such cartidges will hereinafter be referred to, by way of example, as "cartridges of the kind referred to".

SI While cartridge of the kind referred to have been Si particularly successful, one slight problem is that as many S *of them have a reasonably long shelf life, in so far as the chemical contents are concerned, they are left on the shelves and in store rooms, such as in mines and the like, for som- Si time prior to use. In that the cartridges are formed of a generally flexible or semi-flexible material and are secured at each end such as by clipping, heat sealing or the like, they are initially relatively rigid. This is advantageous in use and handling. It has however been found that over some length of time (for example during storage and the like), the cartridges become somewhat limp or floppy. This is something of a disadvantage, in tKat while such physical form does not affect the chemical contents or end use, it is quite -T*C-CII~IIIII~LII~LIII-9 *8e@ e g.

S* me cc...

0* 0*

S*

0 c.

i C 0 0* S e)g

S

important that the cartridge be firm and rigid to allow for correct and efficient handling and the insertion of the cartridge within bore holes and the like. This is particularly the case where long cartridges are concerned.

It is therefore an object of this inventicn to go at least some way towards overcoming or minimising the above problems.

Other objects of this invention will become apparent from the following description.

According to one aspect of the invention, there is provided a cartridge of the kind referred to, and formed of a flexible or semi-flexible material, an outer surface of said cartridge having one or more coatings applied thereto, so as to impart rigidity and firmness to said cartridge.

According to a further aspect of the invention, there is provided a cartridge of the kind referred to, characterised in that it includes a resinous coating applied to an outer surface thereof.

According to a further aspect of this invention, there is provided a cartridge of the kind referred to, formed of a flexible or semi-flexible film material, characterised in that an outer surface of said cartridge has applied thereto an aggregate coating, such as to impart rigidity and firmness to said cartridge.

f According to a further aspect of this invention, there is provided a cartridge of the kind referred to, and being formed of a flexible or semi-flexible film material, characterized in that an outer surface of said cartridge has a coating of bonding-adhesive material and aggregate applied thereto, such as to impart rigidity and firmness to the cartridge.

This invention will now be described by example only and with reference to the accompanying drawings wherein: Fig. 1 is a schematic view of a cartridge as used up until this time when initially manufactured and thereafter following storage, Fig. 2 is a schematic end sectional view of a cartridge as originally manufactured, as shown in Fig. 1 of the drawings, Fig. 3 is a schematic drawing of a coated cartridge according to one form of the present invention and Fig. 4 is a schematic end sectional view of the coated cartridge shown in Fig. 3 of the drawings.

0 *0 S

S.

Referring to Figs. 1 and 2 of the accompanying drawings, the cartridge 1 as originally manufactured and as used up until this time, is shown as having an elongate and relatively rigid formation. The cartridge 1 includes an outer skin 2 of a flexible or semi-flexible material. The cartridge is preferably provided with an innet dividing wall or diaphragm 3 which divides the cartridge into at least two chambers, one chamber 4 having a resin system therein and the other chamber 5 including or locating a catalyst. This is however by way of example only, and any chemical components, capable of reacting together to form a bonding agent, can be utilised. As referred to hereinbefore, on a cartridge being inserted into a rock or bore hole, and on a bolt being inserted or placed in thereafter, the pressure of the bolt will rupture and break open the cartridge whereupon the resin and catalyst will react together, thus forming a substance which will go towards holding the bolt within the bolt hole. This is by way of example only. Fig. 1 of the drawing also shows, in a second form, the form of a cartridge following storage wherein the cartridges lose rigidity and become floppy. This provides real problems with the insertion and use of such cartridges.

I To overcome this problem- it has been found effective i to provide the outer surface 2 of cartridge 1 with a j coating, to impart rigidity and firmness to said o* cartridges.

In one preferred form of the invention, as shown by way of example in Figs. 3 and 4 of the accompanying if drawings, an outer coating 7 is applied to the outer q surface 2 of the flexible or semi-flexiLle film material forming the wall of the cartridge to impart o. strength and rigidity to the cartridge.

In one form of the invention, the coating 7 is in the form of a resin, adhesive-bonding agent type coating which will be quick drying and will, when dried, impart i "additional strength and rigidity to the cartridge. In a further form of the invention, the coating 7 is in the form of aggregate, such as sand and gravel which is coated onto the outer surface of the cartridge by some appropriate means, in order to again impart strength and rigidity to the cartridge.

1L i i -c- In a further form of the invention, as shown by way of example in Fig 4. of the drawings, a combination of an appropriate bonding agent, adhesive, resin or the like together with aggregate 11 is applied to, or coated onto, an outer surface of the cartridge. This then holds the aggregate 0O*

S

S C 5555 56 S 0 S

SOS.

0r eSSO S S

SSSS

S

ts -rt (cPd c i i i against the outer surface of the cartridge, and the aggregate imparts rigidity and firmness to the cartridge.

It has been found in experimentation that cartridges coated in this manner do not have the same tendency to become limp and floppy and in fact maintain relative rigidity, as des-red for effective use, over a far more satisfactory and acceptable length of time than cartridges which are not so formed and/or coated.

It has also been found to be advantageous to use an external aggregate coating, as on the fracturing or rupturing of the cartridge film the aggregate mixes with the formed bonding agent or adhesive and improves and contributes to the mixing of the resin and catalyst.

*4 o While the invention has been described by way of example only 0 0:'15 with reference to adhesives, bonding agents, and aggregates such as sand, it should be appreciated that any appropriate aggregates or mixture of roughened or particulate material such as may be used to adhere to and enhance the rigidity and firmness of such cartridges, may be used.

20 The invention has been described by way of example only and improvements and modifications may be made without departing from the scope thereof, as defined by the appended claims.

S- S5 S. S

Claims

1. A cartridge of the kind referred to, formed of an outer flexible or semi-flexible material, an outer surface of cartridge having one or more coatings applied thereto so as to impart rigidity and firmness 4h4 tox-said cartridge.

2. A cartridge as claimed in Claim 1, wherein a resinous coating is applied to an outer surface thereof. 9

3. A cartridge as claimed in Claim 1, wherein an *f4. outer surface thereof has applied thereto an aggregate coating.

4. A cartridge as claimed in Claim 1, wherein an outer surface thereof has a coating of bonding/adhesive material and aggregate applied thereto or coated thereon.

5. A cartridge substantially as hereinbefore described with reference to Figs 3 and 4 of the accompanying drawings. Dated this 15th day of April 1991 S* FOSROC INTERNATIONAL LIMITED By their Patent Attorneys SGRIFFITH HACK CO.