Title of Invention	"AN APPARATUS FOR CAUSING A PLASTICIZATION OF WOOD FOR MAKING OF BENT ARTICLE"
Abstract	An apparatus for causing a plasticization of wood for making of bent articles comprising at least two chambers each having a first inlet to be connected to a vacuum pump, a second inlet being provided with each chamber for connecting an ammonia gas source for the introduction of ammonia into said chambers, a compressor connected to said chambers to allow an evacuation and recirculation of the residual or spent ammonia gas from one chambers to the other chamber.

Title of Invention

"AN APPARATUS FOR CAUSING A PLASTICIZATION OF WOOD FOR MAKING OF BENT ARTICLE"

Abstract

An apparatus for causing a plasticization of wood for making of bent articles comprising at least two chambers each having a first inlet to be connected to a vacuum pump, a second inlet being provided with each chamber for connecting an ammonia gas source for the introduction of ammonia into said chambers, a compressor connected to said chambers to allow an evacuation and recirculation of the residual or spent ammonia gas from one chambers to the other chamber.

Full Text	FIELD OF INVENTION This invention relates to an apparatus for wood plasticization for making of bent wood furniture such as bent furniture. In particular, this invention is an improvement in or a modification of the invention described in parent patent application no. 2409/Del/98. BACKGROUND OF INVENTION. Parent patent application no. 2409/Del/98 describes a process and apparatus for wood plasticization for making of bent wood furniture and other articles therefrom. The apparatus comprises a single chamber having a first inlet connected to a vacuum pump. An ammonia storage tank is connected to a second inlet of the chamber for introduction of ammonia gas thereto for causing a plasticization of wood disposed within said chamber. The spent or residual gas, after treatment, is discharged from said chamber into a water storage tank and thus it is wasted. OBJECTS OF THE INVENTION An object of this invention is to propose a modified and improved construction of an apparatus for plasticization of wood and wherein the residual and or spent ammonia is utilized. DESCRIPTION OF INVENTION According to this there is provided an apparatus for causing a plasticization of wood for making of bent articles comprising at least two chambers each having a first inlet to be connected to a vacuum pump, a second inlet being provided with each chamber for connecting an ammonia gas source for the introduction of ammonia into said chambers, a compressor connected to said chambers to allow an evacuation and recirculation of the residual or spent ammonia gas from one chambers to the other chamber. In accordance with this invention, the apparatus for causing a plasticization comprises at least two chambers. Preferably, the chambers are of different lengths so as to treat logs of wood of different length. Each of said chambers is connected to a vacuum pump so as to create vacuum in the treatment chambers. Further, each of said chambers is connected to an ammonia source, such as an ammonia gas cylinder for supplying ammonia gas into said chambers for treating the wood with ammonia. A compressor is provided between said chambers for causing an evacuation of the spent or residual ammonia and re-circulation of the spent ammonia from one chamber to the other. In operation, one of the treatment chambers is loaded with strips or logs of wood, and vacuum is then created in such a chamber. Ammonia gas is then introduced into working chamber. Upon completion of treatment, the residual or spent gas is evacuated into the other chamber through a compressor. An apparatus for use for wood plasticization for making of bent wood furniture according to a preferred embodiment is herein described and illustrated in the accompanying drawings: -Fig. 1 shows the plan view of the apparatus. Referring to the drawings figure 1 the apparatus has a treatment chamber 1 preferably of different sizes for accommodating the logs of the wood of different sizes therein to be treated for making the bent furniture. A vacuum/pressure gauge 2 is provided with each chamber for measuring the vacuum and subsequently the pressure into the treatment chambers 1. A first inlet 1A is provided with each chamber 1 for connecting the chambers 1 and to a vacuum pump 4 by means of connecting pipes 8 A and needle valves 8. A 2nd inlet 1B is provided with each cylinder for connecting said cylinders with an ammonia gas source for example an ammonia gas cylinder 5 by means of connecting pipes 8A having needle valves 8. An ammonia gas pressure regulator valves 6 is provided at the outlet of the ammonia gas cylinder for regulating the pressure of ammonia gas into the treatment chambers 1 and ammonia gas compressor 7 is connected with the treatment chambers 1 such that to evacuate the residual or spent ammonia gas from one cylinder and recirculate the same into the other cylinder and vice a versa. During the operation of the device the logs of wood are placed in the treatment chamber of the required size and a vacuum is created into the treatment chamber. The ammonia gas is then supplied into said chamber upto a pressure required for treatment of the logs of wood after the completion of the treatment. The ammonia gas is evacuated from the treatment chamber and is re-circulated into the other treatment chamber for its further use for treating the logs of wood. Thus it is seen that by using the apparatus of the present invention the residual ammonia or spent ammonia gas is utilized again and again and the wastage of the gas is minimized. WE CLAIM: 1. An apparatus for causing a plasticization of wood for making of bent articles comprising at least two chambers each having a first inlet to be connected to a vacuum pump, a second inlet being provided with each chamber for connecting an ammonia gas source for the introduction of ammonia into said chambers, a compressor connected to said chambers to allow an evacuation and recirculation of the residual or spent ammonia gas from one chambers to the other chamber. 2. An apparatus as claimed in claim 1 wherein said vacuum pump and ammonia gas cylinder are connected with said chambers by means of connecting pipes having needle valves such that to supply/ammonia gas or to create the vacuum in the treatment chamber required for treatment of the wood. 3. An apparatus as claimed in claim 1 wherein an ammonia gas compressor having connecting means provided with needle valves is connected to both the treatment chamber such that to evacuate and recirculate the spent or residual ammonia gas from one treatment chamber to other treatment chamber. 4, An apparatus for causing a plasticization of wood for making of bent articles substantially as herein described and illustrated.

Full Text

FIELD OF INVENTION
This invention relates to an apparatus for wood plasticization for making of bent wood furniture such as bent furniture. In particular, this invention is an improvement in or a modification of the invention described in parent patent application no. 2409/Del/98.
BACKGROUND OF INVENTION.
Parent patent application no. 2409/Del/98 describes a process and apparatus for wood plasticization for making of bent wood furniture and other articles therefrom. The apparatus comprises a single chamber having a first inlet connected to a vacuum pump. An ammonia storage tank is connected to a second inlet of the chamber for introduction of ammonia gas thereto for causing a plasticization of wood disposed within said chamber. The spent or residual gas, after treatment, is discharged from said chamber into a water storage tank and thus it is wasted.
OBJECTS OF THE INVENTION
An object of this invention is to propose a modified and improved construction of an apparatus for plasticization of wood and wherein the residual and or spent ammonia is utilized. DESCRIPTION OF INVENTION
According to this there is provided an apparatus for causing a plasticization of wood for making of bent articles comprising at least two chambers each having a first inlet to be connected to a vacuum pump, a second inlet being provided with each chamber for connecting an ammonia gas source for the introduction of ammonia into said chambers, a compressor connected to said chambers to allow an evacuation and recirculation of the residual or spent ammonia gas from one chambers to the other chamber.
In accordance with this invention, the apparatus for causing a plasticization comprises at least two chambers. Preferably, the chambers are of different lengths so as to treat logs of wood of different length. Each of said chambers is connected to a vacuum pump so as to create vacuum in the treatment chambers. Further, each of said chambers is connected to an ammonia source, such as an ammonia gas cylinder for supplying ammonia gas into said chambers for treating the wood with ammonia. A compressor is provided between said chambers for causing an evacuation of the spent or residual ammonia and re-circulation of the spent ammonia from one chamber to the other.
In operation, one of the treatment chambers is loaded with strips or logs of wood, and vacuum is then created in such a chamber. Ammonia gas is then introduced into working chamber. Upon completion of treatment, the residual or spent gas is evacuated into the other chamber through a compressor.
An apparatus for use for wood plasticization for making of bent wood furniture according to a preferred embodiment is herein described and illustrated in the accompanying drawings: -Fig. 1 shows the plan view of the apparatus.
Referring to the drawings figure 1 the apparatus has a treatment chamber 1 preferably of different sizes for accommodating the logs of the wood of different sizes therein to be treated for making the bent furniture. A vacuum/pressure gauge 2 is provided with each chamber for measuring the vacuum and subsequently the pressure into the treatment chambers 1. A first inlet 1A is provided with each chamber 1 for connecting the chambers 1 and to a vacuum pump 4 by means of connecting pipes 8 A and needle valves 8. A 2nd inlet 1B is provided with each cylinder for connecting said cylinders with an ammonia gas
source for example an ammonia gas cylinder 5 by means of connecting pipes 8A having needle valves 8. An ammonia gas pressure regulator valves 6 is provided at the outlet of the ammonia gas cylinder for regulating the pressure of ammonia gas into the treatment chambers 1 and ammonia gas compressor 7 is connected with the treatment chambers 1 such that to evacuate the residual or spent ammonia gas from one cylinder and recirculate the same into the other cylinder and vice a versa.
During the operation of the device the logs of wood are placed in the treatment chamber of the required size and a vacuum is created into the treatment chamber. The ammonia gas is then supplied into said chamber upto a pressure required for treatment of the logs of wood after the completion of the treatment. The ammonia gas is evacuated from the treatment chamber and is re-circulated into the other treatment chamber for its further use for treating the logs of wood.
Thus it is seen that by using the apparatus of the present invention the residual ammonia or spent ammonia gas is utilized again and again and the wastage of the gas is minimized.

WE CLAIM:
1. An apparatus for causing a plasticization of wood for making of bent
articles comprising at least two chambers each having a first inlet to be
connected to a vacuum pump, a second inlet being provided with each
chamber for connecting an ammonia gas source for the introduction of
ammonia into said chambers, a compressor connected to said chambers to
allow an evacuation and recirculation of the residual or spent ammonia gas
from one chambers to the other chamber.
2. An apparatus as claimed in claim 1 wherein said vacuum pump and
ammonia gas cylinder are connected with said chambers by means of
connecting pipes having needle valves such that to supply/ammonia gas or
to create the vacuum in the treatment chamber required for treatment of
the wood.
3. An apparatus as claimed in claim 1 wherein an ammonia gas compressor
having connecting means provided with needle valves is connected to both
the treatment chamber such that to evacuate and recirculate the spent or
residual ammonia gas from one treatment chamber to other treatment
chamber.
4, An apparatus for causing a plasticization of wood for making of bent articles substantially as herein described and illustrated.

Documents:

797-del-2000-abstract.pdf

797-del-2000-claims.pdf

797-DEL-2000-Correspondence-Others-(17-09-2008).pdf

797-del-2000-correspondence-others.pdf

797-del-2000-correspondence-po.pdf

797-del-2000-description (complete).pdf

797-del-2000-drawings.pdf

797-del-2000-form-1.pdf

797-del-2000-form-13-(17-09-2008).pdf

797-del-2000-form-19.pdf

797-del-2000-form-2.pdf

797-DEL-2000-Form-26-(17-09-2008).pdf

797-del-2000-form-3.pdf

797-del-2000-form-4.pdf

797-del-2000-form-5.pdf

797-del-2000-gpa.pdf

797-del-2000-petition-137.pdf

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Patent Number

230920

Indian Patent Application Number

797/DEL/2000

PG Journal Number

13/2009

Publication Date

27-Mar-2009

Grant Date

28-Feb-2009

Date of Filing

04-Sep-2000

Name of Patentee

ESCORTS CONSTRUCTION EQUIPMENT LIMITED

Applicant Address

INDIAN COMPANY OF PLOT NO.2, SECTOR-13, FARIDABAD-121007, INDIA.

Inventors:

#	Inventor's Name	Inventor's Address
1	DINESH KUMAR JAIN	286 D POCKET II, MAYUR VIHAR, PHASE 1, NEW DELHI-110091

PCT International Classification Number

B27M 3/18

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA