Title of Invention	"A PROCESS FOR THE MANUFACTURE OF GLASS TILES"
Abstract	This invention relates to a process for the preparation of glass tiles. According to the process a tile is formed from a composition having bentonite as a binder and then said tile is subjected to the step of firing at a temperature of 780 to 900'C. Further this invention relates to a composition for use in the manufacture of glass tiles. The composition has 60-70% by weight of glass, 8 to 30% by weight of quartz, 5 to 12% by weight of bentonite and 0.1 to 20% by weight of colour in the form of a blended mix with 4 to 8% moisture contents.

Title of Invention

"A PROCESS FOR THE MANUFACTURE OF GLASS TILES"

Abstract

This invention relates to a process for the preparation of glass tiles. According to the process a tile is formed from a composition having bentonite as a binder and then said tile is subjected to the step of firing at a temperature of 780 to 900'C. Further this invention relates to a composition for use in the manufacture of glass tiles. The composition has 60-70% by weight of glass, 8 to 30% by weight of quartz, 5 to 12% by weight of bentonite and 0.1 to 20% by weight of colour in the form of a blended mix with 4 to 8% moisture contents.

Full Text	This invention relates to a process for the manufacture of glass tiles. In particular this invention relates, to a composition and a process for the manufacture of glass tiles. A process for the preparation of glass tiles is as such known in the art. The process comprises in preparing a composition of crushed glass, quartz, po.lyv.inyl alcohol and colour wherein polyvinyl alcohol is used as a binder. The composition of the mixture so obtained is put in a mould which is subjected to the step of sintering and such that the mix has a low viscosity and the rounded edges of the tiles are formed. There are certain disadvantages associated with the known composition and process for the preparation of glass tiles. One of the main disadvantage is that the liquid coating for providing glaring is not possible before firing the glass tile, as the strength of the base material/composition in the unfired state tends to lose shape because of the liquid coating. Another disadvantage is that the composition used for the preparation of the tiles is in capable to absorb additional moisture of the liquid coating. Yet. another disadvantage is that in case of dry coating, the coating is sinks into the tiles as the firing temperature of the coating material as well as glass tiles is the same. Another object of this invention is to propose a process for the preparation of a glass tiles which have sharp but. smooth edges. Yet. another object of this invention is to propose a process for the preparation of glass tiles which have improved weathering properties. Still another object, of this invention is to propose a process for the preparation of glass tiles which has a better life. Yet another object of this invention is to propose a novel composition for use in the manufacture of glass tiles. According to this invention there is provided a process for the preparation of glass tiles comprising forming a tile from a composition having bentonite as a binder and then subjecting said tile to the step of firing at a, temperature of 78O to 9O0Pc. Further according to this invention there is provided a composition for use in the manufacture of glass tiles comprising 6O-7O%. by weight of glass, 8 to 30% by weight of quartz and 5 to 12% by weight, of bentonite and .1 to 2O% colour in the form of a blended mix with 4 to 8% moisture. The process and the composition for the preparation of glass tiles are herein described in details. In accordance with the process of this invention the composition consisting of 6O to 75% by weight of glass, 8 to 3O%. by weight of quartz and 5 to 1.27. by weight of ben tonite and . 1 to 2O% by weight of colour is prepared in the form of a blended mix. The mixture so obtained with 4 to 8% moisture is filled into the moulds so to prepare the glass tiles. The quantum of colour to be used depends on the intensity of colour required in the tiles. The tiles are then subjected to the step of firing in a furnace at the temperature of 73O to 900°C. However, the firing temperature depends on the composition and the coatings of the glass tiles and the surface finish required lower temperature gives a mat appearance and higher temperature gives a lusture to the surface. In distingsion to the known art the binder used in this process is bentonite and preferably white bent.on.ite so as to form the glass tiles of almost, white colour and also has very little effect on the colour of the tiles. The presence of bentonite as binder increases the viscosity of the compsoition and thus the form of the tiles edges are controlled easily. I CLAIM; 1. A process for the preparation of glass tiles comprising forming a tile from a composition having bentonite as a binder and then subjecting said tile to the step of firing at a temperature of 730 to 90O°C. 2. A composition for use in the manufacture of glass tiles comprising 60-707. by weight of glass, 8 to 3O7. by weight of quartz, 5 to 127. by weight of bentonite and . .1 to 20% by weight of colour in the form of a blended mix with 4 to 87. moisture contents. 4. A composition for use in the manufacture of glazed glass tiles substantially as herein described and illustrated. 4. A process for the preparation of glass tiles substantially as herein described and illustrated.

Full Text

This invention relates to a process for the manufacture of glass tiles. In particular this invention relates, to a composition and a process for the manufacture of glass tiles.
A process for the preparation of glass tiles is as such known in the art. The process comprises in preparing a composition of crushed glass, quartz, po.lyv.inyl alcohol and colour wherein polyvinyl alcohol is used as a binder. The composition of the mixture so obtained is put in a mould which is subjected to the step of sintering and such that the mix has a low viscosity and the rounded edges of the tiles are formed.
There are certain disadvantages associated with the known composition and process for the preparation of glass tiles.
One of the main disadvantage is that the liquid coating for providing glaring is not possible before firing the glass tile, as the strength of the base material/composition in the unfired state tends to lose shape because of the liquid coating.

Another disadvantage is that the composition used for the preparation of the tiles is in capable to absorb additional moisture of the liquid coating.
Yet. another disadvantage is that in case of dry coating, the coating is sinks into the tiles as the firing temperature of the coating material as well as glass tiles is the same.
Another object of this invention is to propose a process for the preparation of a glass tiles which have sharp but. smooth edges.
Yet. another object of this invention is to propose a process for the preparation of glass tiles which have improved weathering properties.
Still another object, of this invention is to propose a process for the preparation of glass tiles which has a better life.

Yet another object of this invention is to
propose a novel composition for use in the manufacture of glass tiles.
According to this invention there is provided a process for the preparation of glass tiles comprising forming a tile from a composition having bentonite as a binder and then subjecting said tile to the step of firing at a, temperature of 78O to 9O0Pc.
Further according to this invention there is provided a composition for use in the manufacture of glass tiles comprising 6O-7O%. by weight of glass, 8 to 30% by weight of quartz and 5 to 12% by weight, of bentonite and .1 to 2O% colour in the form of a blended mix with 4 to 8% moisture.

The process and the composition for the preparation of glass tiles are herein described in details.
In accordance with the process of this invention the composition consisting of 6O to 75% by weight of glass, 8 to 3O%. by weight of quartz and 5 to 1.27. by weight of ben tonite and . 1 to 2O% by weight of colour is prepared in the form of a blended mix. The mixture so obtained with 4 to 8% moisture is filled into the moulds so to prepare the glass tiles. The quantum of colour to be used depends on the intensity of colour required in the tiles. The tiles are then subjected to the step of firing in a furnace at the temperature of 73O to 900°C. However, the firing temperature depends on the composition and the coatings of the glass tiles and the surface finish required lower temperature gives a mat appearance and higher temperature gives a lusture to the surface.

In distingsion to the known art the binder used in this process is bentonite and preferably white
bent.on.ite so as to form the glass tiles of almost, white colour and also has very little effect on the colour of
the tiles. The presence of bentonite as binder increases the viscosity of the compsoition and thus the
form of the tiles edges are controlled easily.

I CLAIM;
1. A process for the preparation of glass tiles
comprising forming a tile from a composition having
bentonite as a binder and then subjecting said tile to
the step of firing at a temperature of 730 to 90O°C.
2. A composition for use in the manufacture of glass
tiles comprising 60-707. by weight of glass, 8 to 3O7. by
weight of quartz, 5 to 127. by weight of bentonite and . .1 to 20% by weight of colour in the form of a blended mix with 4 to 87. moisture contents.
4. A composition for use in the manufacture of glazed glass tiles substantially as herein described and illustrated.
4. A process for the preparation of glass tiles substantially as herein described and illustrated.

Documents:

137-del-1998-abstract.pdf

137-DEL-1998-Claims.pdf

137-del-1998-correspondence-others.pdf

137-del-1998-correspondence-po.pdf

137-del-1998-description (complete).pdf

137-del-1998-form-1.pdf

137-del-1998-form-19.pdf

137-del-1998-form-2.pdf

137-del-1998-form-3.pdf

137-del-1998-form-5.pdf

137-del-1998-form-6.pdf

137-del-1998-gpa.pdf

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Patent Number

232218

Indian Patent Application Number

137/DEL/1998

PG Journal Number

13/2009

Publication Date

27-Mar-2009

Grant Date

16-Mar-2009

Date of Filing

19-Jan-1998

Name of Patentee

UDAY GUPTA

Applicant Address

4634, AJMERE GARE, DELHI-110 006, INDIA.

Inventors:

#	Inventor's Name	Inventor's Address
1	UDAY GUPTA	4634, AJMERE GATE, DELHI-110006, INDIA.

PCT International Classification Number

C04B 41/00

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA