Title of Invention

"A PROCESS FOR PRODUCING GLASS TILES FROM CRUSHED GLASS"

Abstract This invention relates to a process for producing glass tiles from crushed glass comprising steps of : grinding glass of a single or multiple colours to a mesh size of for example 100 mesh added with a dispersing agent, a colouring agent, an opacifying agent if required and a binder such as p.v.a so as to obtain a meal, pressing of meal in a mould to form a composite, heating of the composite to 700-°-800°C to form tile, characterized by the steps of cooling to a temperature of 600-300°C, deposition of ferric chloride (Fecl3) or Titanium Chloride (TiCl3) on to the tile, cooling to room temperature.
Full Text FIELD OF INVENTION
This invention relates to a process for producing glass tiles from crushed glass. In particular, this invention relates to a process for producing glass tiles from crushed glass in distinction to glass tiles prepared from molted glass.
KNOW ART
A process known in the art for the manufacture of glass tiles consists in passing molted glass between the nip of two rollers so as to form a sheet of tiles, wherein, adjacent tiles are separated by a V notch. One of said rollers has serration to impart roughness to the base of the tiles. The other roller has normally a special surface so as to impart a corresponding surface to the front face of the tile.
A process is known in the art which envisages the use of pulversied glass for the manufacture of glass tiles. Such a process consists in grinding or pulversized glass of a single or multiple colours to a mesh size of approximately 100 mesh or finer and to which is added a dispersing agent, a coloring agent and/or opcaifying agent if required and a binder such as p.v.a. Such a meal is pressed in a mould and the composite is fired to a temperature of about 700°-800°C to form the tile. Firing at this temperature allows a further compaction of atleast 5%, which is sufficient enough to cause a deformation of the edges of the tile and a simultaneous polishing of said tile. Thus, one of the
essential advantages of such a tile was to produce a tile having smooth or rounded edges.
In another embodiment crushed glass, quartz, binder such as clay and water is added to constitute a raw meal. The raw meal is then subjected to the step of compaction under pressure to form a shaped composite. A liquid coat consisting a clay, glass powder, colour, suspension agent and emulsifying agent in water is sprayed onto the upper surface of the shaped composite. A high alumina glass powder with or without colour may or may not be sprinkled on the shaped composite on top of the liquid coating of the shaped composite. Such a step of sprinkling may be effected in a single or plurality of stages. Finally, the shaped composite with the coatings is sintered at a temperature of 800° to 900°C.
However the tile of the known process did not have a multi colour effect and provided only the same colour effect and provided only the same colour as provided in the raw meal or its coatings after compaction.
The inventive step of the invendon are indicated in the principal claims and advantageous feaures have been reflected in the dependent claims.
OBJECTS OF THE INVENTION
An object of the invention is to propose a process for producing glass tiles from crushed glass, which has a multi colour effect.
Another object of this invention is to propose a process for producing glass tiles from crushed glass having a multicolour effect but which does not require additional equipment than those employed in the art.
Still another object of this invention is to propose a process for producing glass tiles from crushed glass which is efficient.
Further objects and advantages of this invention will be more apparent from the ensuing description,
STATEMENT OF INVENTION
According to this invention, there is provided a process for producing glass tiles from crushed glass comprising steps of : -grinding glass of a single or multiple colours to a mesh size of for example 100 mesh added with a dispersing agent, a colouring agent, an opacifying agent if required and a binder such as p.v.a so as to obtain a meal, - pressing of meal in a mould to form a composite, -heating of the composite to 700-°-800°C to form tile, characterized by the steps of - cooling to a temperature of 600-300°C, - deposition of ferric chloride (Feel3) or Titanium Chloride (TiCl3) on to the tile, - cooling to room temperature.
SUMMARY OF THE INVENTION

According to this invention there is provided a process for producing glass tiles from crushed glass in distinction to glass tiles prepared from molten glass comprising steps of:
grinding glass of a single or multiple colours to a mesh size of
for example 100 mesh added with a dispersing agent, a
colouring agent, optionally an opacifying agent and a binder
such as p.v.a so as to obtain a meal
pressing of meal in a mould to form a composite,
heating the composite to 700°-800°C to form tile
cooling to a temperature of 600-300°C
deposition of ferric chloride (Fecls) or Titanium chloride (Ticl3)
on to the tile.
cooling to room temperature
Still further according to this invention there is provided a process for producing glass tiles from crushed glass in distinction to glass tiles prepared from molten glass comprising steps of:
grinding glass of a single or multiple colours to a mesh size of
for example 100 mesh, added with a dispersing agent, a
colouring agent; optionally an opacifying agent and a binder
such as p.v.a so as to obtain a meal
pressing of meal in a mould to form a composite
heating of the composite to 700°-800°C to form tile
cooling to room temperature
reheating in a furnace to a temperature of 500°C - 750°C
deposition of ferric chloride (Fecl3) or Titanium chloride (Ticl3)
on to the tile.
cooling the tile to room temperature
Yet further according to this invention there is provided a process for producing glass tiles from crushed glass in distinction to glass tiles prepared from molten glass comprising steps of:
- mixing of crushed glass, quartz, binder such as clay and water to form a raw meal
- compaction of the meal under pressure to form a shaped composite
- spraying of a liquid coat comprising of clay, glass powder, colour, suspension agent and emulsifying agent in water onto the upper surface of the composite
optional sprinkling of a highly alumina glass powder with
or without colour on the coating
sintering of the composite with coating(s) at a temperature
of 800-900°C
cooling to a temperature of 600-300°C deposition of ferric chloride (Feci3) or Titanium chloride
(Ticl3) on to the tile. Cooling to room temperature
Further according to this invention there is provided a process for producing glass tiles from crushed glass in distinction to glass tiles prepared from molten glass comprising steps of :
- mixing of crushed glass, quartz, binder such as clay and
water to form a raw meal
compaction of the meal under pressure to form a shaped
composite
spraying of a liquid coat comprising of clay, glass powder,
colour, suspension agent and emulsifying agent in water
onto the upper surface of the composite
- optional sprinkling of a highly alumina glass powder with
or without colour on the 'coating
sintering of the composite with coating(s) at a temperature of 800-900°C
- cooling to room temperature
- reheating in a furnace to a temperature of 500°C -750°C
- deposition of ferric chloride (Fecl3) or Titanium chloride
(Ticl3) on to the tile.
Cooling to room temperature.
DETAIL DESCRIPTION OF THE INVENTION
As described hereinabove, the process of the present invention provides a glass tile which has a multicolour effect, but without the requirement of providing aay additional equipment other than those already employed in the known process.
The sintered compact i.e. glass tile after firing as given in the various known process are removed from the furnace and then allowed to cool. Such a step of the process is known.
Coated Tiles:
Specifically, in accordance with one embodiment of the invention, the glass tiles from the furnace are allowed to cool to temperature of 600-300°C and ferric chloride mixed with water under pressure 2-6 kg/sqcm - is sprayed onto the tile. Alternatively an atmosphere of ferric chloride is formed by vapours or a mist of ferric chloride is allowed to deposit on said tile. Such a deposit of ferric chloride may be effected in the furnace itself, which may be in the presence or absence of oxygen.
In accordance with yet another embodiment, the tiles may first be sintered and cooled and the a reheated in the furnace to a temperature of 300 to 600°C and the aforesaid steps carried out.
In the instance, when a metallic finish is required, ferric chloride is employed. However in the instance where is colored effect is required titanium chloride is employed.
In the instance where a fluorescent property is required, then a
phosphorescent agent is added to the glass mix itself. The
procedure is give in application r.o
It is to be noted that the present invention is susceptible to modifications, adaptations and changes by those skilled in the art. Such variant embodiments employing the concepts and features of this invention are intended to be within the scope of the present invention, which is further set forth under the following claims: -








WE CLAIM
1. A process for producing glass tiles from crushed glass comprising steps of :
- grinding glass of a single or multiple colours to a mesh size of for example 100 mesh added with a dispersing agent, a colouring agent, an opacifying agent if required and a binder such as p.v.a so as to obtain a meal,
- pressing of meal in a mould to form a composite,
- heating of the composite to 700-°-800°C to form tile, characterized by the steps of
- cooling to a temperature of 600-300°C,
- deposition of ferric chloride (Fecl3) or Titanium Chloride (TiCl3) on to the tile,
- cooling to room temperature.
2. A process as claimed in claim 1 wherein said heating of the composite to
form tile is followed by:
- cooling to room temperature,
- reheating in a furnace to a temperature of 500-750°C,
- deposition of ferric chloride (Fecl3) or Titanium Chloride (Ticl3) on to the tile and
- cooling to room temperature.
3. A process as claimed in claim 1, can be used for producing glass titles from
crushed glass comprising steps of said cooling, deposition and cooling at
room temperature, which is preceded by the steps of:

- mixing of crushed glass, quartz, binder such as clay and water to form a raw meal,
- Compaction of the metal under pressure to form a shaped composite,
- spraying of a liquid coat comprising of clay, glass powder, colours suspension agent and emulsifying agent in water onto the upper surface of the composite,
- Optional sprinkling of a highly alumina glass powder with or without colour on the coating, and
- sintering of the composite with coating(s) at a temperature of 800-900°C, wherein the step of sintering of the composite with coating(s) is followed by:
- cooling to room temperature,
- reheating in a furnace to a temperature of 500°C-750°C,
- cooling to a temperature of 600-300°C,
- deposition of ferric chloride (Fecl3) or Titanium chloride (Ticl3) on to the tile,
- cooling to room temperature.
4. A process as claimed in any of the preceding claims, wherein the deposition is carried out by spraying Ferric chloride (Fecl3) or Titanium chloride (Ticl3) on the tile under pressure of 2-6 kg/sqcm.

5. A process as claimed in any of the preceding claims wherein the deposition
is carried out by vapours or a mist of Ferric chloride (Fecl3) or Titanium
chloride (Ticl3).
6. A process for producing glass tiles from crushed glass substantially as herein described.

Documents:

1247-DEL-2005-Abstract-(15-06-2011).pdf

1247-del-2005-abstract.pdf

1247-DEL-2005-Claims-(07-03-2011).pdf

1247-DEL-2005-Claims-(15-06-2011).pdf

1247-del-2005-claims.pdf

1247-DEL-2005-Correspondence Others-(15-06-2011).pdf

1247-DEL-2005-Correspondence-Others-(07-03-2011).pdf

1247-del-2005-correspondence-others.pdf

1247-del-2005-correspondence-po.pdf

1247-DEL-2005-Description (Complete)-(07-03-2011).pdf

1247-DEL-2005-Description (Complete)-(15-06-2011).pdf

1247-del-2005-description (complete).pdf

1247-del-2005-description (provisional).pdf

1247-DEL-2005-Form-1-(15-06-2011).pdf

1247-del-2005-form-1.pdf

1247-del-2005-form-18.pdf

1247-DEL-2005-Form-2-(15-06-2011).pdf

1247-del-2005-form-2.pdf

1247-DEL-2005-Form-3-(07-03-2011).pdf

1247-del-2005-form-3.pdf

1247-del-2005-form-5.pdf

1247-del-2005-gpa.pdf

1247-DLE-2005-Correspondence-Others-(24-02-2011).pdf

1247-DLE-2005-GPA-(24-02-2011).pdf


Patent Number 249373
Indian Patent Application Number 1247/DEL/2005
PG Journal Number 42/2011
Publication Date 21-Oct-2011
Grant Date 18-Oct-2011
Date of Filing 16-May-2005
Name of Patentee UDAY GUPTA
Applicant Address 321-S, CHIRAG DELHI, NEW DELHI-110017, INDIA.
Inventors:
# Inventor's Name Inventor's Address
1 UDAY GUPTA 321-S, CHIRAG DELHI, NEW DELHI-110017, INDIA.
PCT International Classification Number E04F 13/14
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA