Indian Patents. 200408:A RING WITH IMPROVED WORKING PROFILE FOR A RING TRAVELLER ASSEMBLY

Title of Invention	A RING WITH IMPROVED WORKING PROFILE FOR A RING TRAVELLER ASSEMBLY
Abstract	This invention relates to a ring with improved working profile for ring traveller assembly. The ring has an inner radius of 0.87 mm to 0.94 mm and has a hard chrome plated working profile which provides smooth surface finish and high wear resistance. Hard chrome plating may be 5 to 50 microns thickness to provide a hardness of 800 to 1100 Hv 0.5.

Full Text	This invention relates to a ring with improved working profile for a ring-traveller assembly in textile spinning machines. Rings play a very important role in determining the twist, strength, imperfections and hairiness of the yam produced by spinning. The speed of operation of the spinning machines also depends on the surface finish and profile of the ring. The configuration of working profile of the existing ring has an inner radius of about 1.15 mm. These rings are made of bearing steel and are hardened by heat treatment. This configuration does not provide adequate mating with the ring traveller. Further machining and heat treatment do not result in producing very smooth inner surface. These draw backs result in inferior quality yam and affect the rate of production adversely. This invention is aimed at improving the performance of the ring and traveller assembly for producing better quality yam. Improvement in the rate of production is also one of the objects of this invention. The inner radius of the working profile or surface of the ring is altered fi-om the existing 1.15 mm to a range of 0.87 mm to 0.94 mm. This enables better contact with the mating traveller without causing yam breaks. Rings with the above working profile are manufactured by conventional methods using known machinery. Rings made are then subjected to heat treatment in a known manner. This invention is directed to achieving better surface finishing for these rings. Rings are subjected to hard chrome plating to provide better and smooth surface finish thereto. Smooth surface of the ring results in substantial reduction in friction during operation thereby improving the performance of the ring-traveller assembly rate of production of improved quality of yam. Hard chrome plating consists of depositing a chrome layer on the base material of the ring. This may be effected by conventional methods, a specific method of hard chrome plating is being described hereinafter. Rings to be chrom plated are cleaned by immersing them in an alkaline solution. The alkaline solution may preferably contain 40 to 50 gram of alkali per liter of water and the treatment may be effected under heating. A preferred temperature is about 90oC. This alkaline treatment or cleansing is carried out for a period of 5 mts or more. Rings are then taken out from the alkaline bath and washed well with water to remove alkaline contamination. Rings may be subjected to a second step of cleaning by subjecting them to anodic treatment in a cleaning tank containing an alkaline solution of 40 to 50 gm of alkali per litre. Anodic treatment or cleansing is effected in a known manner and for a period of upto 2 mtrs and preferably at a temperature range of 70 to 80oC. The electrolytic is alkaline in nature and may have a concentration of 40 to 50 grams of an alkali per litre of water. Rings are taking out of the bath after two minutes and are washed in fresh water to remove adherent alkali. Rings thus cleaned are anodically etched in a bath containing chromic acid for a period of two minutes at a temperature of about 50°C. Chromic acid solution may have a density of 18-22 Be. Anodically etched rings are then hard chrome plated in a conventional manner. Chromic acid of density 18-24 Be is used as the electrolyte and the rings are subjected to chrome plating for period of about 30mts at a temperature of 55°C to 60°C. Hard chrome plated rings are then washed with demineralized water and then neutralised in a tank containing any neutral salt solution. Concentration of the salt solution may be 20 kg/1200 litres of water and deneutralization may be effected for two minutes. Neutralised rings are further washed with water and dried. Hard chrome plating is effected till a thickness in the range of 5 to 50 microns is achieved to obtain hardness in the range of 800 to 1100 HV 0.5. Hard chrome plating produces high wear resistance, corrosion protection and increased sliding properties. Working prifile of the ring has been described with reference to the drawings filed along with the provisional specification. WE CLAIM: 1, A ring with improved working profile for a ring traveller assembly wherein said ring has an inner radius ranging from 0.87 mm to 0.94 mm, said rings having a hard chrome plated working profile to provide smooth surface finish and high wear resistance thereby reducing friction during operation. 2. The ring as claimed in claim 1, which is hard chrome plated by subjecting the same to electrolytic treatment in a bath containing chromic acid. 3. The ring as claimed in claim 1 and 2, wherein said hard chrome plating is effected in chromic acid bath of density 18-24 Be for about 30 mtrs at a temperature range of 55 to 60°C. 4. The ring as claimed in claims 1 to 3, wherein said hard chrome plating has a thickness in the range of 5 to 50 microns and has hardness in the range of 800 to 1100 HV 0,5. 5. The ring as claimed in claims 1 to 4, which is first cleaned in an alkaline solution, washed with water and then subjected to anodic treatment in an "alkaline bath followed by anodic etching in a bath containing chromic acid prior to hard chrome plating. 6. The ring as claimed in claim 5 which is treated in an anodic bath containing 40 to 50 gms of alkali/litre of water for a period of 2 minutes at a temperature range of 70 to 80 °C. 7. The ring as claimed in claim 5, which is anodically etched in a bath containing chromic acid solution having a density of 18 to 22 Be at a temperature of about 50°C for two mts and then washed in the water prior to hard chrome plating. 8. A ring with improved working profile for a ring and traveller assembly substantially as herein described.

Full Text

This invention relates to a ring with improved working profile for a ring-traveller assembly in textile spinning machines.
Rings play a very important role in determining the twist, strength, imperfections and hairiness of the yam produced by spinning. The speed of operation of the spinning machines also depends on the surface finish and profile of the ring.
The configuration of working profile of the existing ring has an inner radius of about 1.15 mm. These rings are made of bearing steel and are hardened by heat treatment. This configuration does not provide adequate mating with the ring traveller. Further machining and heat treatment do not result in producing very smooth inner surface. These draw backs result in inferior quality yam and affect the rate of production adversely.
This invention is aimed at improving the performance of the ring and traveller assembly for producing better quality yam. Improvement in the rate of production is also one of the objects of this invention.
The inner radius of the working profile or surface of the ring is altered fi-om the existing 1.15 mm to a range of 0.87 mm to 0.94 mm. This enables better contact with the mating traveller without causing yam breaks.

Rings with the above working profile are manufactured by conventional methods using known machinery. Rings made are then subjected to heat treatment in a known manner. This invention is directed to achieving better surface finishing for these rings. Rings are subjected to hard chrome plating to provide better and smooth surface finish thereto. Smooth surface of the ring results in substantial reduction in friction during operation thereby improving the performance of the ring-traveller assembly rate of production of improved quality of yam.
Hard chrome plating consists of depositing a chrome layer on the base material of the ring. This may be effected by conventional methods, a specific method of hard chrome plating is being described hereinafter.
Rings to be chrom plated are cleaned by immersing them in an alkaline solution. The alkaline solution may preferably contain 40 to 50 gram of alkali per liter of water and the treatment may be effected under heating. A preferred temperature is about 90oC. This alkaline treatment or cleansing is carried out for a period of 5 mts or more. Rings are then taken out from the alkaline bath and washed well with water to remove alkaline contamination.

Rings may be subjected to a second step of cleaning by subjecting them to anodic treatment in a cleaning tank containing an alkaline solution of 40 to 50 gm of alkali per litre. Anodic treatment or cleansing is effected in a known manner and for a period of upto 2 mtrs and preferably at a temperature range of 70 to 80oC. The electrolytic is alkaline in nature and may have a concentration of 40 to 50 grams of an alkali per litre of water. Rings are taking out of the bath after two minutes and are washed in fresh water to remove adherent alkali.
Rings thus cleaned are anodically etched in a bath containing chromic acid for a period of two minutes at a temperature of about 50°C. Chromic acid solution may have a density of 18-22 Be.
Anodically etched rings are then hard chrome plated in a conventional manner. Chromic acid of density 18-24 Be is used as the electrolyte and the rings are subjected to chrome plating for period of about 30mts at a temperature of 55°C to 60°C. Hard chrome plated rings are then washed with demineralized water and then neutralised in a tank containing any neutral salt solution. Concentration of the salt solution may be 20 kg/1200 litres of water and deneutralization may be effected for two minutes. Neutralised rings are further washed with water and dried. Hard chrome plating is effected till a thickness in the range of 5 to 50 microns is achieved to obtain hardness in the range of 800 to 1100 HV 0.5.

Hard chrome plating produces high wear resistance, corrosion protection and increased sliding properties.
Working prifile of the ring has been described with reference to the drawings filed along with the provisional specification.

WE CLAIM:
1, A ring with improved working profile for a ring traveller assembly
wherein said ring has an inner radius ranging from 0.87 mm to 0.94
mm, said rings having a hard chrome plated working profile to
provide smooth surface finish and high wear resistance thereby
reducing friction during operation.
2. The ring as claimed in claim 1, which is hard chrome plated by
subjecting the same to electrolytic treatment in a bath containing
chromic acid.
3. The ring as claimed in claim 1 and 2, wherein said hard chrome
plating is effected in chromic acid bath of density 18-24 Be for about
30 mtrs at a temperature range of 55 to 60°C.
4. The ring as claimed in claims 1 to 3, wherein said hard chrome plating has a thickness in the range of 5 to 50 microns and has hardness in the range of 800 to 1100 HV 0,5.
5. The ring as claimed in claims 1 to 4, which is first cleaned in an alkaline solution, washed with water and then subjected to anodic treatment in an "alkaline bath followed by anodic etching in a bath containing chromic acid prior to hard chrome plating.

6. The ring as claimed in claim 5 which is treated in an anodic bath
containing 40 to 50 gms of alkali/litre of water for a period of 2
minutes at a temperature range of 70 to 80 °C.
7. The ring as claimed in claim 5, which is anodically etched in a bath
containing chromic acid solution having a density of 18 to 22 Be at a
temperature of about 50°C for two mts and then washed in the water
prior to hard chrome plating.
8. A ring with improved working profile for a ring and traveller
assembly substantially as herein described.

Documents:

1030-mas-2000-abstract.pdf

1030-mas-2000-claims filed.pdf

1030-mas-2000-claims grand.pdf

1030-mas-2000-correspondnece-others.pdf

1030-mas-2000-correspondnece-po.pdf

1030-mas-2000-description(complete) filed.pdf

1030-mas-2000-description(complete) grand.pdf

1030-mas-2000-description(provisional).pdf

1030-mas-2000-drawings.pdf

1030-mas-2000-form 1.pdf

1030-mas-2000-form 19.pdf

1030-mas-2000-form 26.pdf

1030-mas-2000-form 3.pdf

1030-mas-2000-form 5.pdf

« Previous Patent

Next Patent »

Patent Number

200408

Indian Patent Application Number

1030/MAS/2000

PG Journal Number

08/2007

Publication Date

23-Feb-2007

Grant Date

16-May-2006

Date of Filing

30-Nov-2000

Name of Patentee

LAKSHMI MACHINE WORKS LIMITED

Applicant Address

PERIANAICKENPALAYAM, COIMBATORE 641 020

Inventors:

#	Inventor's Name	Inventor's Address
1	PERIASAMY IYER NARASIMHAN	No:99 West Ponnurangam Road, R.S. Puram, Coimbatore 641 002.
2	PONNUSWAMY NAGARAJAN	146, Lakshmi Mill Quarters, Pappanaickenapalayam, Coimbatore 641 037.

PCT International Classification Number

N/A

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA