FORM-2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
PROVISIONAL
Specification
(See section 10 and rule 13)
WATER PURIFICATION SYSTEM
HITECH PLAST LIMITED
an Indian Company
of C/130, Solaris I, Opp. L & T Gate No.6, Powai, Mumbai 400 072,
Maharashtra, India
THE FOLLOWING SPEC IFICATION DESCRIBES THE INVENTION.

Field of invention:
The present invention relates to a water purification system and more particularly relates to a portable water filtering and purifying system.
Background of the invention:
One of the oldest methods of holding (storing) water in the outdoors is with the use of bags, one such know bags were used by Aborigines where they carried water in kangaroo skins. In the present day, usually backpackers carry water bag which is specifically used to carry large amount of water, while traveling in groups rather than for personal use only. Another popular method is carrying water in bottles. This is drinking water packed in bottles for individual consumption where drinking water is not readily available or is not clean enough to drink. Currently there exist a number of water bottles which are used to store water, these are expensive and are not environmental friendly. Though the materials used are generally recyclable, many of these bottles, particularly those used in developing countries without recycling infrastructure, are discarded rather than recycled. This has a negative effect on the environment.
However the need is for filtered and purified water which is easily carried in a bottle. ' Portable techniques for purifying water are used for hiking, camping etc. or for use in rural areas or emergency situations. Common techniques include boiling, disinfection with tablets, ultra-filtration and the like.
Boiling is not routinely used to purify drinking water except in emergencies. This method works well to make water safe to drink which is contaminated with living organisms. It is recommended that water should be boiled for several minutes in advance of consumption or use, in order to kill as much of the bacteria and viral contamination as possible. The disadvantages of boiling water include that boiling should not be used when toxic metals, chemicals (lead, mercury, asbestos, pesticides, solvents, etc.), or nitrates have contaminated the water. Boiling may concentrate any harmful contaminants that do not vaporize as the relatively pure water vapor boils off.
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Other technique available is water purification tablets (comprised primarily of iodine) which may be used to sterilize water and kills most of common pathogens present in natural fresh water sources. Iodine is a lightweight solution for water purification. Kits are available in market that include an iodine pill and a second pill (vitamin C or ascorbic acid) which removes the iodine taste from the water after it has been disinfected. However, a disadvantage associated with the use of water purification tablets is that they leave the water with an unpleasant taste or odor. There are also many polymer and ceramic filters market that incorporates iodine post-treatment in their filter elements to kill viruses. Iodine can also be added to water as a solution, crystal, or in tablets form.
Active carbon filtering system are also used which economically remove wide variety
of contaminants like bacteria and protozoa, such as Cryptosporidium and Giardia lamblia, but not viruses which can collect and grow within carbon beds, so disinfection by chemicals or ultraviolet light is required after filtration. Ultraviolet (UV) light destroys DNA and thereby prevents microbes from reproducing.
Portable water filters have been developed to facilitate a user to obtain clean water wherever user goes, which is readily available and can be reused. It also reduces the probability of contamination of filtered and purified water as it is done inside the water bottle compared to the distilled water which includes many steps prior to drinking. This kind of arrangement helps to cut down the use of distilled water bottle and is user friendly, simple and economical. These kind of water filtration and purifying systems are also know in the art with different filtration technologies to meet some of the problems described above. These filter cartridges particularly include granulated active carbon bed and co-axially aligned resin bed.
Objects of the invention:
The primary object of the present invention is to provide a portable filtering bottle assembly.
Another objective is to provide a personal filtering assembly that can be used anywhere to provide the user with filtered water.
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Yet another objective of the present invention is to provide a portable filtering bottle that will save a user from buying bottled water.
Yet another objective is to provide a bottle which can be used several times with the available water resource.
Yet another objective is to provide a method of filtering and purifying water with an assembly installed inside a container.
Yet another objective is to provide a purifying assembly which removes microbes like salmonella, pseudomonas and E-coli.
Still another objective is to provide a filtering assembly which filters particulate matter from an impure liquid.
Summary of the invention:
The present invention provides a water filtering and purifying apparatus housed in a container which is flexibly resilient and can be manually squeezed to dispense the liquid from the container. The container is provided with two openings one at the bottom which is removable to fill impure water and one at top from where liquid is dispensed after purification. Cartridge is provided at the top portion of the container housed with activated carbon and iodine based resin.
In accordance with one aspect of the present invention, the cartridge is provided with an iodine based resin and activated carbon filter which is fitted in the top of the container. The activated carbon is placed on either side of the resin to adsorb iodine vapors and the other carbon layer removes the odor of iodine from the treated water. Particulate matter in the liquid is removed in the first stage then the liquid passes through the resin wherein all the bacteria are removed, this purified water again passes through the carbon filter in the second stage to remove odor of iodine and also to adsorb the iodine vapors.
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Brief description of the drawings:
The invention will now be described with reference to the accompanying drawings, in
which
FIG. 1 is the longitudinal cross section of the invention.
FIG. 2 is the blown up longitudinal cross section of the invention.
Figure 2 shows a simplified blown up longitudinal cross sectional view of personal water purifier. It is a flexible resilient thin walled container 9, which has a removable bottom opening lid 11, which includes external threads 10, above the bottom opening are two circular rib 12, top portion of the container is fitted with cartridge 2, which is filled with activated carbon filtering medium 3&5, within which iodine based resin 4, is encompassed , filter 7 is placed at the neck region of the container, which is fitted with a spout cum closure 13, at the bottom most portion of the cartridge is a sealing element 8. This upper portion of the container is covered with a removable cap 1, provided with internal threads.
Detailed description of the invention and preferred embodiments:
The product comprises a cylindrical container 9 made out of material having good resilient property like polypropylene, polyethylene or HDPE etc., to impart good spring back action. Container has two openings - one at the bottom to fill impure water and another at the top. The bottom opening has got a circumferential flange, which gets compressed, when a cap 11 made out of suitable material and having outer threading 10, on the container to unscrew and close the cap 11. As a result there is no leakage from the said opening and it is air tight. The top opening is suitably fitted with a cartridge 2 made out of suitable material and having two openings - one at the top and another at the bottom such that the bottom opening is an extension of the top opening in the container 9. Between the said two openings of the cartridge 2, a filtration mechanism is installed. Below this cartridge is the neck region of the container where a circular groove is made to hold the container firmly. From the top opening in the cartridge 2 a circular rib originates, on which, a spout cum closure 12
made out of suitable material is suitably fitted.
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The filter mechanism comprises an iodine based resin encompassed between two filters 3 & 5 of suitable mesh size. The filter 5 nearer to the top opening of the container 9 filters particulate matter in the first stage. Then the water passes through the resin where all the microbes like Salmonella, Pseudomonas and E-coli are removed. The top filter 3 allows the pure water to flow out when the spout cum
closure 12 is moved to expose the top opening in the cartridge 2. The cartridge 2 also houses activated carbon to adsorb iodine vapors and deodorize the treated water. A sealing element 8 is placed at the bottom most portion of the cartridge 2 such that it is held tightly between the cartridge 2 and the container 9 when they are assembled. As a result there is no leakage from the top opening of the container 9. The activated carbon is placed on either sides of the resin. The carbon layer near the top opening of the container 9 adsorbs the iodine vapors, not allowing them to settle on the container 9 and the cap 10. The other carbon layer removes the odor of iodine from the treated water and also adsorbs iodine vapors. The top portion of the container is covered with a removable cap 1, which is used as a cup to collect the purified water when it is squeezed out from the container.
In accordance with one preferred embodiment of the invention, the activated carbon is placed between filters 5 and 7 such that filter 7 is placed nearest to the top opening of the container 9. Alternatively the carbon can be mixed with the resin instead of placing in the above manner.
The resin takes a minimum particular time called Threshold Time to kill the bacteria. This means the contact time of the water with the resin should always be more than or equal to the Threshold Time in order to make it pure. The flow rate of the water depends on
a. the pressure applied on it when the container 9, in which it is filled, is
compressed,
b. the compactness of the resin and carbon layer.
The material selection for the container 9 and its geometry and the compactness of the resin and carbon layer are such that irrespective of the extent of compression, the contact time of the water with the resin is maintained towards the higher side of the Threshold Time so as to ensure purity of water under all conditions.
In a preferred embodiment, the cartridge 2 is fitted to the container 9 in a manner, such that it cannot be opened easily once fitted. To achieve this tightness, a large
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amount of force needs to be applied in the vertical direction on the cartridge 2 after it is located on the container 9 during the assembly. The material selection for the container 9 and its geometry are such that it can withstand the required force and yet remain flexible to impart good spring back when pressed sideways.
While considerable emphasis has been placed herein on the particular features of the preferred embodiment and the improvisation with regards to it, it will be appreciated the various modifications can be made in the preferred embodiments without departing from the principles of the invention. These and the other modifications in the nature of the invention will be apparent to those skilled in art from disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to interpreted merely as illustrative of the invention and not as a limitation.
Dated this 6th day of March, 2007.

MOHAN DEWAN
OF R. K.DEWAN & COMPANY
APPLICANTS' PATENT ATTORNEY
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