FORM 2
THE PATENT ACT, 1970
(39 OF 1970)
COMPLETE SPECIFICATION
(Section 10 and Rule 13)
TITLE An insulated Melamine Casserole for retaining the heat for longer time and process for manufacturing the same
Applicant's Name: HAMILTON HOUSEWARES PVT LTD.
Address: Asian Building, 4th Floor, R. Kamani Marg, Ballard Estate,
Mumbai 400 001
The following specification particularly describes the invention and the manner in which it is to be performed.

FIELD OF THE INVENTION
This invention relates to an insulated Melamine Casserole for retaining the heat for longer time and process for manufacturing the same.
PRIOR ART:
In Current Casserole product portfolio, casseroles are mostly available in following range
• Insulated Thermoplastic casseroles
• Ceramic Casseroles
• Non-insulated Melamine Casseroles
Insulated Thermoplastic Casseroles bodies are made with PP, HDPE or ABS, which have poor aesthetic and poor scratch resistance.
Ceramic Casseroles have good scratch resistance with good aesthetic but having few disadvantages including breakability and high weight.
Non-insulated Melamine Casseroles have poor heat retention.
In this way current invention Melamince Insulated casserole overcome the problems with existing casseroles product portfolio,
The Present Invention Comprises of Double-wall Melamine Casserole filled with Polyurethane foam within walls of Body and Lid. Said Casserole is break resistant and dishwasher safe. The Insulated Melamine Casserole retain the temperature of content for longer. For better resting and sealing of Lid on Body a Rib is provided. Two walls of Body and Lid are sealed with Non-toxic and Non-hazardous Adhesives. Insulation have an advantage over Single wall casseroles that it can retain heat for longer because of thermal Insulation behavior of

both Insulation and melamine walls
OBJECTIVES OF THE INVENTION
• The objective of the invention is to make a Melamine casserole that can
retain the temperature of the food items for longer time
■ Also an Objective to achieve high gloss surface like ceramics and scratch
resistant Melamine casserole to retain gloss.
• Also further the objective is to achieve the above mentioned objective
keeping in mind that the item to be retained is food, which is to be consumed .
• Other objective is to achieve the above mentioned activity using thermal
Insulation behavior of both Insulation and melamine walls
• Also a further objective is to manufacture an insulated Melamine casserole
which retains the heat for longer time
■ Also the specific nature of the invention, other features, objects, uses and
the advantages thereof will clearly appear from the description below accompanied by the drawings in different views which are not to scale,
STATEMENT OF THE INVENTION
An insulated Melamine Casserole for retaining the heat for longer time comprising a double wall lid(3) comprising inner wall(5) and outer wall (6) joined permanently to each other at an area ( 21) with an adhesive ; a double wall Body(2) comprising inner wall(12) and outer wall (13) joined to each other at an area (22 ) with an adhesive and said inner and outer wall joined to each other by a rib(14) on inner wall and a corresponding depression(

17 ) in outer wall; an insulation layer (24) in the walls of Body and Lid; a knob(4) fitted in the outer wall (6) of the lid for lifting the lid from the body ; a rib ( 8) provided on inner wall of the double wall lid seals the lid to inner wall of double wall body (2) ; a flange( 15 ) extends from the inner wall of the body with which the casserole can be lifted .
BRIEF DESCRIPTION OF THE DRAWINGS
For a further understanding of the nature and objects of the present invention, reference should be had to the following detailed description, taken in conjunction with the accompanying drawings, in which like parts are given like reference numerals,
FIGURE 1 IS A BOTTOM VIEW OF INNER LID. FIGURE 2 IS A SECTIONAL VIEW OF INNER LID. FIGURE 3 IS A SECTIONAL VIEW OF OUTER LID. FIGURE A IS BOTTOM VIEW OF OUTER LID. FIGURE 5 IS TOP VIEW OF INNER BODY FIGURE 6 IS SECTIONAL VIEW OF INNER BODY FIGURE 7 IS BOTTOM VIEW OF OUTER BODY FIGURE 8 IS SECTIONAL VIEW OF OUTER BODY FIGURE 9 IS BOTTOM VIEW OF KNOB FIGURE 10 IS SECTIONAL VIEW OF KNOB FIGURE 11 IS FRONT VIEW OF ASSEMBLED BODY FIGURE 12 IS SECTIONAL VIEW OF ASSEMBLED BODY FIGURE 13 IS SECTIONAL VIEW OF ASSEMBLED LID

FIGURE 14 IS ISOMETRIC VIEW OF ASSEMBLED CASSEROLE FIGURE 15 IS SECTIONAL VIEW OF ASSEMBLED CASSEROLE
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to the drawings, wherein like reference numerals designate corresponding or similar elements throughout the several views, according to the present invention as depicted in figure 15 In particular can be referred.
According to the first aspect of disclosed invention the casserole is designed to retain the heat using a Polymeric or non polymeric insulation. The insulating material can have thermal conductivity in the range of 0.020-0.100 W/mK. The insulation used in disclosed product is based on Polyurethane foam, Melamine Foam, Polystyrene foam, PP Foam but not limited to that.
According to another aspect of the disclosed invention the casserole is having thermally insulated walls, which also helps to retain the heat. The material used for the same could be melamine or others but not limited to melamine. Used melamine raw material is safe for food contact.
According to another aspect of disclosed invention the inner body and inner lid of Casserole is treated for better adhesion with insulation foam material. The treatment used for inner body and inner lid could be Chemical, Mechanical, mechanochemical , photochemical but not limited to the same. The treatment provided excellent adhesion with foam especially when using liquid PU filling process for insulation. The function of treatment allows to reduce the surface tension of surface to be adhered and improve adhesion.
According to an another aspect of disclosed invention the rib and depression area which came in contact which both walls are also treated for better adhesion when adhered using Adhesives. Similarly the treatment of surface could be Chemical, mechanical, mechanochemical, photochemical but

not limited to that.
The casserole is made of Melamine Formaldehyde resin. The main parts made of Melamine Formaldehyde resin are double wall body and double wall Lid .The final product can be said as melamine insulated Melamine casserole .The Melamine Insulated Melamine Casserole is mainly consisted of Melamine material except the knob made of ABS. Melamine based inner body, outer body, inner lid , outer lid is made using compression molding process. The compression molding process could be in two or three steps. In the first step melamine powder is compressed for defined period of time for curing and defined shape is given. Further the same product is over moulded with Glazing compound for excellent shine on the surface. If needed a melamine printed paper is also molded on first molding component.
A knob is fitted using self tapping screw in outer lid.
Inner part of Body and lid is treated for surface preparation. Similarly the contact area of double walls in Body and Lid are also treated for adhesion surface preparation. Treatment used for the same could be chemical, mechanical, Mechanochemical, photochemical etc.
Further the PU liquid is filled in outer body and inner body is inserted over that and kept under pressure. Prior to insert inner body and inner lid an adhesive is applied on contact area, which further cures and retain the PUF inside and seal the double wall to make body and lid leak-proof. The surface treatment of Inner body and Inner lid allows PUF foam to better adhere with the same, which provides excellent insulation behavior.
Other than PU Insulation inner body and Inner Lid does not requires surface treatment on full area. In such case the Foam is just filled without any treatment as it is foamed material and the treatment is done only where adhesive is to be applied.
The 1-15 figures can be referred for better understanding of the invention

In figure / drawing no 1 a bottom view of inner lid is shown. In figure / drawing no 2 a sectional view of inner lid is shown A rib (7) on inner lid for resting of outer lid is shown also a rib (8) on inner lid for better resting on body is shown and this also ensures very few heat losses. This rib (8) provided on inner wall of the double wall lid seals the lid to inner wall of double wall body (2). In figure / drawing no 3 a sectional view of outer lid is shown .In the depression ( 9 ) outer lid knob rests. In the depression (10) on outer lid inner lid rests. The knob is locked finally in holes(11) in outer lid .In figure / drawing no 4 is bottom view of outer lid is shown .In figure / drawing no 5 is top view of inner body is shown. In figure / drawing no 6 is sectional view of inner body is shown. Ribs (14) in inner body wall for resting in outer body wall is shown . Further Flange (15) on inner body for holding the casserole is shown, and it is clear that it is extending inner wall of the body beyond the rib (14) . Moreover casserole as an assembled body can be lifted when it needs to be moved for use .In figure / drawing no 7 a bottom view of outer body is shown. Dimples (16) are shown in outer wall, these help to casserole to set on a flat surface. In Figure / drawing no 8 a sectional view of outer body is shown, Dimples on outer body is shown. Moreover Depression (17) on outer body for resting of inner body is shown. In figure / drawing no 9 a bottom view of knob is shown .In figure / drawing no 10 a sectional view of knob is shown. A flange (18) in knob for easy handling of casserole is shown. The knob/lid can be lifted or can be placed on body with the help of this flange. In figure 9 Hole (19) in knob for self tapping screw is shown, in this hole the self tapping screws are screed due to which knob gets attached to outer wall of lid. In figure 9 a surface (20) where Plating of knob is done is also shown. !n figure / drawing no 11 a front view of assembled body is shown when lid is not placed on it .In figure / drawing no 12 a sectional view of assembled body is shown , this shows Adhesive contact area of inner body wall and outer body wall. This show an area 22, where adhesive is applied. Adhesive properties and nature are as given in the description .This tries to seal permanently the two walls i.e. the inner wall(12) and outer wall (13) of the body. Moreover this figure 12 also shows

the rib(14) and depression (17) mating. Also the dimples (16) are again shown. Also the sectional lines shown i.e. lines between inner wall and outer wall refer to an area where insulation is packed
In figure / drawing no 13 a sectional view of assembled lid is shown where this shows Adhesive contact area of inner lid and outer lid(21). This shows an area 21, where adhesive is applied. Adhesive properties and nature are as given in the description .This tries to seal permanently the two walls i.e. the inner wall (5) and outer wall (6) of the lid. Moreover this figure 12 also shows the rib (8). Also the sectional lines shown i.e. lines between inner wall and outer wall refer to an area where insulation is packed. Moreover the knob fixed on the outer lid with the help of self tapping screws is shown in this figure. Figure / drawing no 14 is isometric view of assembled casserole where when the lid and body are assembled are shown. In figure / drawing no 15 is sectional view of assembled casserole which clearly highlights a double wall lid(3) comprising inner wall(5) and outer wall (6) joined permanently to each other at an area (21 ) with an adhesive; a double wall Body(2) comprising inner Wall(12) and outer wall (13) joined to each other at an area (22 ) with an adhesive and said inner and outer wall joined to each other by a rib on inner wall( 14 ) and a corresponding depression( 17 ) in outer wall ; an insulation layer (24) in the walls of Body and Lid; a knob(4) fitted in the outer wall (6) of the lid for lifting the lid from the body ;a rib ( 8) provided on inner wall of the double wall lid seals the lid to inner wall of double wall body (2); a flange(15 ) extends from the inner wall of the body with which the Melamine casserole can be lifted.
Various parts are given reference numerals as :
1. Melamine Casserole
2. A double wall body
3. A double wall lid

4. A knob
5. An inner wall of the double wall lid also called as inner lid
6. An outer wall of the double wall lid also called as outer lid
7. A rib on inner lid for resting of outer lid
8. A rib on inner lid for better resting on body
9. Depression on outer lid for resting of knob
10. Depression on outer lid for resting of inner lid
11. Holes in outer lid for locking of knob
12. An inner wall of the double wall body

13. An outer wall of the double wall body
14. Ribs in inner body wall for resting on outer body wall
15. Flange on inner body for holding the Melamine casserole
16. Dimples on outer body
17. Depression on outer body for resting of inner body
18. A flange in knob for easy handling
19. Hole in knob for self tapping screw
20. Plating of knob
21. Adhesive contact area of inner lid and outer lid
22. Adhesive contact area of inner body and outer body

23. Galvanized iron Self tapping screw
24. Puf /insulation

While the invention has been illustrated and described in detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character, it being understood that only the preferred embodiment has been shown and described and that all changes and modifications that come within the scope of the invention are desired to be protected

We Claim:
1.An insulated Melamine Casserole for retaining the heat for longer time comprising:
a double wall lid(3) comprising inner wall(5) and outer wall (6) joined permanently to each other at an area ( 21) with an adhesive ;
a double wall Body(2) comprising inner wall(12) and outer wall (13) joined to each other at an area (22 ) with an adhesive and said inner and outer wall joined to each other by a rib (l4)on inner wall and a corresponding depression ( 17 ) in outer wall ;
an insulation layer (24) in the walls of Body and Lid;
a knob{4) fitted in the outer wall (6) of the lid for lifting the lid from the body;
a rib ( 8) provided on inner wall of the double wall lid seals the lid to inner wall of double wall body (2) ;
a flange( 15 ) extends from the inner wall of the body with which the Melamine casserole can be lifted .
2. The Insulated Melamine Casserole of Claim 1, wherein the double wall
body and double wall Lid are made of Melamine Formaldehyde resin.
3. The Insulated Melamine casserole of claim 1, wherein the inner lid and
inner wall of double wall body are treated for surface preparation.
4. The Insulated Melamine casserole of claim 3, wherein the surface
treatment is chemical, mechanical, mechaniochemical, photochemical etc.
5. The Insulated Melamine casserole of claim 1, wherein the contact area(
22 ) of outer wall and inner wall of double body , contact area ( 21 )of

outer wall lid and inner wall lid is given adhesion surface treatment.
6. The Insulated Melamine casserole of claim 1, wherein the double walls
are adhered using non-toxic, non-hazardous adhesives.
7. The Insulated Melamine casserole of claim 1, wherein the insulation is selected from polyurethane foam or melamine foam or polyolefin foam or polystyrene foam.
8. The Insulated Melamine casserole of claim 1,wherein a flange( 18 ) extends from the body of the knob for easy handling of the lid of the Melamine casserole .
9. The Insulated Melamine casserole of claim 1, wherein the knob has holes ( 19) where self taping screws for locking the knob to complementary holes (19 } in outer wall of lid are fitted
10.The Insulated Melamine casserole of claim 1, wherein the knob rests on depressions ( 9 )in outer wall of the lid.
11. The Insulated Melamine casserole of claim 1, wherein the knob is made of thermoplastic material.
12.The Insulated Melamine casserole of claim 9, wherein the thermoplastic material is ABS.
13.The Insulated Melamine casserole of claim 10, wherein the thermoplastic material is electroplated for Metallic effect.
14. The Insulated Melamine casserole of claim 1, wherein the outer wall of
body rests on a surface through dimples( ) in outer wall of the body.
15. Process of manufacturing an insulated Melamine Casserole as claimed in
claims 1-14,
Compressing the melamine powder for curing and getting a desired shape i.e.inner body, outer body , inner lid , outer lid;

over moulding the desired shape with glazing compound for shine on surface;
fitting of knob on outer lid with self tapping screw;
preparing inner wall of the body and inner Lid for surface treatment;
adhesion surface treatment given to contact area of walls and lid;
filling PU liquid in the outer body ;
applying adhesive between contact area of walls and lid;
inserting inner body over outer body and pressure is applied;
surface treatment is given to inner walls of body and inner lid.
16. Process of manufacturing an insulated Melamine Casserole as claimed in claim 14, wherein the surface treatment is chemical, mechanical, mechaniochemical, photochemical etc