Claims:We claim:

1. A method of degreasing and coating of a coil, the method comprising the steps of:
degreasing the coil with the help of chemical treatment having Keenol;
cleaning the chemical present on the coil;
drying the coil with roller pressure;
cleaning the coil by water;
bone drying the coil at 100 degrees centigrade temperature;
lacquering the coil with vinyl laquer; and
curing the coil at 180 degrees centigrade temperature.

2. The method of degreasing and coating of a coil as claimed in claim 1, wherein the Keenol is in concentration of 5-10%.

3. The method of degreasing and coating of a coil as claimed in claim 1, wherein the water is a demineralised water and varies from 35 to 60 degrees centigrade temperature.

4. A degreased and coated coil, the degreased and coated coil produced from the method comprising the steps of:
a) degreasing the coil with the help of chemical treatment having Keenol in concentration of 5-10%;
b) cleaning the chemical present on the coil;
c) drying the coil with roller pressure;
d) cleaning the coil by water;
e) bone drying the coil at 100 degrees centigrade temperature;
f) lacquering the coil with vinyl laquer; and
g) curing the coil at 180 degrees centigrade temperature.

5. A system for degreasing and coating of a coil, the system comprising:
an input unit for providing the coil for degreasing and coating;
an uncoiler unit, for uncoiling the coils, connected to the input unit;
a slicing unit, for stitching of the coils, connected to the uncoiler unit;
an accumulator unit, for storing chemicals for treatment of the coil, connected to the slicing unit;
a treatment unit, for chemical treatment of the coil, connected to the accumulator unit;
a cleaning unit, for cleaning of the coil for any residual particles, connected to the treatment unit;
a washing unit, for washing of the coil with demineralised (DM) water at 35 degrees centigrade temperature, connected to the cleaning unit;
a drying unit, for drying of the coil at 100-110 degrees centigrade temperature, connected to the washing unit;
a coating unit, for coating of metal coil, connected to the drying unit;
a drying unit, for drying of the coated coil at temperature of 180-190 degrees centigrade temperature, connected to the coating unit;
a recoiler unit, for recoiling of the coil, connected to the drying unit; and
a cooling unit, for cooling the coil, connected to the recoiler unit.

6. The system for degreasing and coating of a coil as claimed in claim 5, wherein the slicing of the coil includes stitching of two coils, end to end in the event of the coils being smaller in length or having a low weight.

7. The system for degreasing and coating of a coil as claimed in claim 6, wherein a single coil having weight of 2.5 to 3.0 tons is preferred for better productivity and minimal rejection.

8. The system for degreasing and coating of a coil as claimed in claim 5, wherein the treatment of the coil comprises of keenol, preferably in the range of 5-10%, and demineralised water at 60 degrees centigrade temperature.

9. The system for degreasing and coating of a coil as claimed in claim 5, wherein the heating unit includes oven for drying of the coil.

10. The system for degreasing and coating of a coil as claimed in claim 5, wherein the coating includes top coating and vinyl size inside coating. , Description:FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003

COMPLETE SPECIFICATION
(See section 10 and rule 13)

DEGREASED AND COATED COIL, AND A SYSTEM AND A METHOD OF PRODUCING THEREOF

BKM INDUSTRIES LIMITED,
a company incorporated under the Laws of India, of the address 5th Floor, Block – 3B, Ecospace Business Park, New Town, Rajarhat, Kolkata, Pincode - 700 160, India

The following specification particularly describes the invention and the manner in which it is to be performed.
FIELD OF THE INVENTION
The present invention relates to a degreased and coated coil, more particularly, a metal coil, and a system and a method of producing thereof through coil to coil degreasing and coating.

BACKGROUND OF THE INVENTION
With the development of technology, printing on metal sheets or coils has evolved to produce better quality print product. However, the method used to degrease the sheets or coils prior to coating and printing using various chemical solvents are not effective to completely remove the oil from the sheet or coil. Therefore, inadequate degreasing of the sheet or coil results in additional cost for chemical, and improper adhesion quality of sheet or coil for coating and printing.
In addition, the inadequate degreasing of the sheets or coils further results in oxidation on the surface of sheet or coil causing peel-off issues on printed sheets or coils.
Hence, the object of present invention is to solve one or more of aforementioned issues.

SUMMARY OF THE INVENTION
In an embodiment, the present invention provides a degreased and coated coil produced from a method comprising the steps of degreasing the coil with the help of chemical treatment preferably with Keenol in concentration of 5-10%; cleaning the chemical (Keenol) present on the coil; drying the coil with roller pressure; cleaning the coil by demineralised (DM) water; bone drying the coil at 100 degrees centigrade temperature; lacquering the coil with vinyl laquer; and curing the coil at 180 degrees centigrade temperature.
In another embodiment, the present invention provides a method of coil to coil degreasing followed by coil to coil coating on both the sides of a coil, the method comprising the steps of:
Step 1: degreasing the coil with the help of chemical treatment
preferably with Keenol in concentration of 5-10%;
Step 2: cleaning the chemical (Keenol) present on the coil;
Step 3: drying the coil with roller pressure;
Step 4: cleaning the coil by water;
Step 5: bone drying the coil at 100 degrees centigrade
temperature;
Step 6: lacquering the coil with vinyl laquer;
Step 7: curing the coil at 180 degrees centigrade temperature; and
Step 8: cooling the coil.
In yet another embodiment, the present invention provides a system for coil to coil degreasing followed by coil to coil coating on both the sides of a coil, the system comprising:
an input unit for providing the coil for degreasing and coating;
an uncoiler unit, for uncoiling the coils, connected to the input unit;
a slicing unit, for stitching of the coils, connected to the uncoiler unit;
an accumulator unit, for storing chemicals for treatment of the coil, connected to the slicing unit;
a treatment unit, for chemical treatment of the coil, connected to the accumulator unit;
a cleaning unit, for cleaning of the coil for any residual particles, connected to the treatment unit;
a washing unit, for washing of the coil with demineralised (DM) water at 35 degrees centigrade temperature, connected to the cleaning unit;
a drying unit, for drying of the coil at 100-110 degrees centigrade temperature, connected to the washing unit;
a coating unit, for coating of metal coil, connected to the drying unit;
a drying unit, for drying of the coated coil at temperature of 180-190 degrees centigrade temperature, connected to the coating unit;
a recoiler unit, for recoiling of the coil, connected to the drying unit; and
a cooling unit, for cooling the coil, connected to the recoiler unit.

BRIEF DESCRIPTION OF DRAWINGS
Reference will be made to embodiments of the invention, example of which may be illustrated in the accompanying figure(s). These figure(s) are intended to be illustrative, not limiting. Although the invention is generally described in the context of these embodiments, it should be understood that it is not intended to limit the scope of the invention to these particular embodiments.
Figure 1 shows a flowchart for degreasing and coating of a coil according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION
In an embodiment, the present invention provides a method of coil to coil degreasing followed by coil to coil coating on both the sides of a coil, the method comprising the steps of:
Step 1: degreasing the coil with the help of chemical treatment
preferably with Keenol in concentration of 5 -10%;
Step 2: cleaning the chemical (Keenol) present on the coil;
Step 3: drying the coil with roller pressure;
Step 4: cleaning the coil by water;
Step 5: bone drying the coil at 100 degrees centigrade
temperature;
Step 6: lacquering the coil with vinyl laquer;
Step 7: curing the coil at 180 -190 degrees centigrade
temperature; and
Step 8: cooling the coil.

ADVANTAGEOUS EFFECT
Adoption of the above described method, wherein degreasing of the coil at an effective level whereby the coil becomes bone dry and thereafter, within the shortest possible time, coating the coil on both sides, makes it ready for a fine quality printing. This method helps in minimization of oxidation on surface of the coil, thereby, enhancing the quality of printing on the coil.

In another embodiment, the present invention provides a system for coil to coil degreasing followed by coil to coil coating on both the sides of a coil, the system comprising:
an input unit for providing the coil for degreasing and coating;
an uncoiler unit, for uncoiling the coils, connected to the input unit;
a slicing unit, for stitching of the coils, connected to the uncoiler unit;
an accumulator unit, for storing chemicals for treatment of the coil, connected to the slicing unit;
a treatment unit, for chemical treatment of the coil, connected to the accumulator unit;
a cleaning unit, for cleaning of the coil for any residual particles, connected to the treatment unit;
a washing unit, for washing of the coil with demineralised (DM) water at 35 degrees centigrade temperature, connected to the cleaning unit;
a drying unit, for drying of the coil at 100-110 degrees centigrade temperature, connected to the washing unit;
a coating unit, for coating of metal coil, connected to the drying unit;
a drying unit, for drying of the coated coil at temperature of 180-190 degrees centigrade temperature, connected to the coating unit;
a recoiler unit, for recoiling of the coil, connected to the drying unit; and
a cooling unit, for cooling the coil, connected to the recoiler unit.

According to the present invention, the slicing of the coil includes stitching of two coils, end to end in the event of the coils being smaller in length or having a low weight. Advantageously, a single coil having weight of 2.5 to 3.0 tons is preferred for better productivity and minimal rejection.
According to the present invention, the treatment of the coil comprises of keenol, preferably in the range of 5-10%, and demineralised water at 60 degrees centigrade temperature.
According to the present invention, the heating unit includes oven for drying of the coil.
According to the present invention, the coating includes top coating and vinyl size inside coating.
According to the present invention, the cooling unit includes exhaust system for cooling of the coil.

In yet another embodiment, the present invention provides a degreased and coated coil having excellent print quality, the degreased and coated coil produced from the process comprising the steps of:
a) degreasing the coil with the help of chemical treatment preferably with Keenol in concentration of 5-10%;
b) cleaning the chemical (Keenol) on the coil;
c) drying the coil with roller pressure;
d) cleaning the coil by water;
e) bone drying the coil at 100 degrees centigrade temperature;
f) lacquering the coil with vinyl laquer;
g) curing the coil at 180 degrees centigrade temperature;
h) cooling of the coil.

The subject matter is now described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. In the following description, for purpose of explanation, numerous specific details are set forth in order to provide a thorough understanding of the claimed subject matter. It may be evident however, that such matter can be practiced with these specific details. In other instances, well-known structures as shown in diagram form in order to facilitate describing the invention.

Referring Figure 1 shows a method (100) of coil to coil degreasing followed by coil to coil coating on both the sides of a coil, the method comprising the steps of:
101: providing the coil for degreasing and coating, in an input unit;
102: uncoiling the coils, in an uncoiler unit;
103: stitching of coils, in a slicing unit;
104: storing the chemicals for treatment of the metal coil, in an accumulator unit;
105: chemical treatment of the metal coil, in a treatment unit;
106: cleaning of the metal coil for any residual particles, in a cleaning unit;
107: washing of the metal coil with demineralised (DM) water at 35 degrees centigrade, in a washing unit;
108: drying of the metal coil at 100-110 degrees centigrade, in a drying unit;
109: coating of the metal coil, in a coating unit;
110: drying of the coated metal coil at temperature of 180-190 degrees centigrade, in a drying unit;
111: recoiling of metal coil, in a recoiler unit; and
112: cooling the coil, in a cooling unit.

As shown in Figure 1, the step 103 of slicing of coil includes stitching of two coils, end to end in the event of the coils being smaller in length or having a low weight. Therefore, single coil having weight of 2.5 to 3.0 tons is preferred for better productivity and minimal rejection.
As shown in Figure 1, the step 105 of treatment of the coil comprises of keenol, preferably in the range of 5-10%, and demineralised water at 60 degrees centigrade temperature.
As shown in Figure 1, the step 108 of drying includes oven for drying of the coil.
As shown in Figure 1, the step 109 of coating includes top coating and vinyl size inside coating.
As shown in Figure 1, the step 112 of cooling unit includes exhaust system for cooling of the coil.

INDUSTRIAL APPLICABILITY
It is apparent that the degreased and coated coil, and a system and a method of producing thereof of the present invention are applicable to degreasing, coating, and printing of sheet or coil industries. The degreased and coated coil of the present invention provides excellent quality of printing on the coil.

The foregoing description of the invention has been set merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the substance of the invention may occur to person skilled in the art, the invention should be construed to include everything within the scope of the disclosure.