Description:FIELD OF THE INVENTION
The present invention generally relates to the field of production of blow-moulded water tanks. More specifically, the present invention related to blow-moulded water tank with bigger Mouth (opening) and its method of production thereof.
BACKGROUND OF THE INVENTION
Blow-moulded water tanks are a modern advancement in water storage technology, produced through a process known as blow moulding. This manufacturing method offers several distinct advantages, making blow-moulded tanks a popular choice for a wide range of applications.
However, in current scenario, water tanks produced by blow molding are voluminous & comparatively of less in weight. As a result, after production while dispatching it to another location, fewer tanks can be loaded onto a vehicle for transportation, leading to higher freight costs per tank or per kilogram Also, the Tonnage wise capacity of vehicle is far more than actual loaded Tanks.
US 7, 981, 356 B2 discloses a method and apparatus for stretch blow moulding a preform into a desired article is disclosed. The method includes the steps of inserting the preform into a hollow mould, stretching the heated preform with a stretching member, filling the preform with an incompressible fluid such that the preform expands and is formed into the article by the mould and draining the incompressible fluid from the interior of the formed article. The apparatus comprises a hollow mould for receiving the preform, a stretching member for stretching the preform, an incompressible fluid filling means for filling the preform with an incompressible fluid such that the preform expands and a drain for draining the incompressible fluid from the formed article.
US-20060267255-A1 A process for producing a single-layer blow-moulded container having improved mechanical, thermo-mechanical and barrier properties without loss of impact strength or stress-crack resistance is disclosed. The container is produced by direct extrusion of masterbatch with polyethylene matrix resin. The viscosity of the masterbatch (. eta..sub.MB) and the viscosity of the polyethylene matrix resin (.eta..sub.PE) are in the ratio of between 0.3 to 1.9 at a shear rate of between 10 to 100 1/s. The invention also relates to the single layer blow moulded container produced by that process.
Therefore, to overcome the limitation of the loading of more tanks onto a vehicle, the present invention provides water tanks with bigger Mouth / Opening which will result into telescoping of tanks, wherein one water tank fits inside the other with compatible diameters. Also, the present invention reduces freight cost per tank / per Kg by half as it increases the nos. of tanks dispatch in a vehicle approximately by double quantity.
OBJECTIVE OF THE INVENTION
• The main object of the present invention is to provide water tanks with wide opening, to accumulate the tanks of lesser capacity.
• Yet, another objective of the present invention is to facilitate loading of more tanks in a vehicle during dispatching it to different locations.
• Another objective of the present invention is to provide a water tank which can reduces freight cost per tank / per Kg by half.
• Yet, another objective of present invention is to load 200 Liters inside the 500 Liters tanks & further loading of 200 liters and the 500 Liters inside 1000 Liters tanks and so on and so forth.
SUMMARY OF THE INVENTION
The present invention provides water tanks with wide opening, each having an upper body, middle body, rib, lower body, inlet, outlet, and lid (mouth) of varying diameter. The water tanks of the present invention can be telescoped into one another, which allows stacking during storage and transportation, thus facilitating loading of more tanks in a vehicle during dispatching it to different locations. The telescoped set of water tanks include a first water tank having a capacity of 300 liter, a second water tank having a capacity of 500 liters, and a third water tank having a capacity of 750 liters and fourth water tank having a capacity of 1000 liters. The opening/ mouth of each of the water tank is manufactured in a way such that a smaller water tank can fit inside a larger water tank.

The ability of telescoping water tanks one above the other facilitates loading of more tanks in a vehicle during dispatching it to different locations. Also, it reduces freight cost per tank / per Kg by half.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The accompanying drawings explain the various embodiments of the invention, highlighting the scope of the invention:
Fig 1: Existing Tank Lid.
Fig 2: Proposed Tank Lid.
Fig 3: a) Existing Water Tank Drawing with parts mentioned.
b) Existing Water Tank Drawing with Dimension.
Fig 4: a) Proposed Water Tank Drawing with parts mentioned.
b) Proposed Water Tank Drawing with Dimension.
Fig 5: Complete Concept Drawing of Telescoping Tanks.
Fig 6: Blow Moulding Process diagram.
Fig 7: Drawing of 300 Litres Water Tank.
Fig 8: Drawing of 500 Litres Water Tank.
Fig 9: Drawing of 750 Litres Water Tank.
Fig 10: Drawing of 1000 Litres Water Tank.
DETAILED DESCRIPTION OF THE INVENTION
The present invention will now be described hereinafter with reference to the accompanying drawings in which a preferred embodiment of the invention is shown. This invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiment set forth herein. Rather, the embodiment is provided so that this disclosure will be thorough, and will fully convey the scope of the invention to those skilled in the art.
Many aspects of the invention can be better understood with references made to the drawings below. The components in the drawings are not necessarily drawn to scale. Instead, emphasis is placed upon clearly illustrating the components of the present invention. Moreover, like reference numerals designate corresponding section through several views in the drawings. Before explaining at least one embodiment of the invention, it is to be understood that the embodiments of the invention are not limited in their application to the details of construction and to the arrangement of the components set forth in the following description or illustrated in the drawings. The embodiments of the invention are capable of being practiced and carried out in various ways. In addition, the phraseology and terminology employed herein are for the purpose of description and should not be regarded as limiting.
The present invention provides water tank with a wide opening, having varying diameter that enables the water tank of varying capacity to be telescoped inside one another. Each water tank is sized such that a smaller water tank can fit within a larger water tank
In a preferred embodiment, the water tanks with varying diameter (mouth and base) included but not limited to the following dimensions given below are provided:
Water Tank (capacity of 1000 litre) has a dimension of a mouth diameter 933mm, a base diameter of 1102mm and a height of 1140mm.
Water Tank (capacity of 750 litre) has a dimension of a mouth diameter _827mm_, a base diameter of 993mm and a height of 1150mm.
Water Tank (capacity of 500 litre) has a dimension of a mouth diameter 737mm, a base diameter of 903mm and a height of 938mm.
Water Tank (capacity of 300 litre) has a dimension of a mouth diameter 544mm, a base diameter of 710mm and a height of 918mm.
The varying diameter enables smaller water tank to easily fit within a larger water tank, formed a set of stacked water tanks.
In another embodiment, the extrusion and blowing process also known as Extrusion Blow Molding (EBM) is disclosed which is applied in the manufacture of water tanks. The feed funnel containing the polymer, which is plasticized on the extruder thread is heated to the point of melting, so that passing through the head and tube-like die yields the parison. Then the mold is closed and the blow pin inflates the parison tube forcing it to the surface of the mold cavity whose cooling system causes the material to solidify around the contour. The water tank. The extrusion and blow molding process further involves various operations, including burr cutting, printing and other finishing operations. Also, the same is processed with Multiple layers (3-6 Layers).
The process of blow molding water tanks involves the following steps:
1. Heating
Granular plastic raw materials are heated and melted in a screw extruder.
2. Creating a parison
A tube-like piece of plastic with a hole in one end is extruded from the die head. This tube is called a parison or preform.
3. Clamping and inflating
The parison is clamped into a mold and compressed air is blown into it. The air pressure pushes the plastic to match the mold's shape.
4. Cooling and demolding
Once the plastic has cooled and hardened, the mold opens and the tank is ejected.
Blow molding is a fully automatic process that can produce precise products with strong outside corners and customer wall thickness. It's also considered a reliable manufacturing option that's safe for labor and helps keep the environment clean.

EXAMPLE:
The present invention provides a water tank which is designed for efficient stacking based on varying wide-mouth diameters. As illustrated in Figure 5, the water tank arrangement consists of:
a. First water tank with a capacity of 1000 Liters;
b. Second water tank with a capacity of 500 litres, configured to stack within the first water tank;
c. Third water tank with a capacity of 300 litres, configured to stack within the second water tank

ADVANTAGES OF THE PRESENT INVENTION
1. The advantage of the present invention is to provide a water tank with wide mouth opening that allows space-efficient stacking during storage and transportation, thus facilitating loading of more tanks in a vehicle during dispatching it to different locations.
2. Another advantage of the present invention is to provide a water tank which can reduces freight cost per tank / per Kg by half.
3. Another advantage of the present invention is to store more numbers of tanks in the limited space (Either at factory yard or dealer’s godown or retailer’s shop, etc.)
4. Another advantage of the present invention is to provide the wide lid opening which can enable a person to get inside the installed water tank (empty) for cleaning purpose.
, Claims:WE CLAIM:

1. A telescopic water tank, wherein the said water tank comprises of;
upper body;
middle body;
rib;
lower body having a base diameter in the range of 710mm to 1102mm;
inlet;
outlet and;
lid (mouth);
wherein, the total capacity of said water tank is within the range of 300 Liters to 1000 Liters;
characterized in that the
lid (mouth) having a diameter in the range of 544mm to 933mm; and
wherein both diameter of base and mouth enables telescoping/stacking of water tanks and each of the telescoped water tank is sized such that a smaller water tank can fit within a larger water tank.
2. The water tank as claimed in claim 1, wherein said set of telescoped/stacked water tanks with varying diameter comprising the capacities included but not limited to;
a. a first water tank with a capacity of 1000 Liters;
b. a second water tank with a capacity of 500 litres, configured to stack within the second water tank;
c. a third water tank with a capacity of 300 litres, configured to stack within the third water tank.
3. The water tank as claimed in claim 2, wherein said first tank with a capacity of 1000 liter has a dimension of a mouth diameter 933 mm, a base diameter of 1102mm and a height of 1140mm.
4. The water tank as claimed in claim 2, wherein said second tank with a capacity of 500 liter has a dimension of a mouth diameter 737mm, a base diameter of 903mm and a height of 938mm.
5. The water tank as claimed in claim 2, wherein said third tank with a capacity of 300 liter has a dimension of a mouth diameter 544mm, a base diameter of 710mm and a height of 918mm.
6. A method of manufacturing telescoped water tanks, wherein the said method is comprising of the following steps;
(a) Heating and melting the granular plastic raw materials in a screw extruder;
(b) Extruding a tube-like piece of plastic with a hole in one end from die head to create a tube called as parison or preform;
(c) Clamping the parison as obtained in step (b) into a mold and compressed air is blown into it, wherein said air pressure pushes the plastic to match the mold's shape;
(d) Upon cooling and hardening of the plastic as obtained in step (c), the mold opens and tank is ejected.
7. The method of manufacturing telescoped water tanks as claimed in claim 6, wherein the water tank as formed is characterized in having a lid/mouth of the diameter in the range of 544mm to 933mm.
8. The method of manufacturing telescoped water tanks as claimed in claim 6, wherein the mold shape is modified in a way to obtain the water tanks with characteristic lid/mouth.
9. The method of manufacturing telescoped water tanks as claimed in claim 6, wherein the said method provides telescoped water tanks which reduces the logistics and freight costs.

Dated this 26th day of September, 2024