# US 4,397,144 A · Open-end spinning device

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- Number: US 4,397,144 A
- Document ID: US4397144A
- Status: Granted
- Kind: A
- Application number: 06/258,371
- Filed: 1981-04-28
- Granted: 1983-08-09
- Earliest claimed: 1980-04-30
- Assignees: W. Schlafhorst AG & Co.
- Inventors: Hans Raasch; Jakob Lenzen; Klaus Pohl
- Web page: https://patentgrep.com/patent/US4397144A

## CPC

- D01H 4/10: Rotors
- D01H 4/40: Removing running yarn from the yarn forming region, e.g. using tubes
- D01H: SPINNING OR TWISTING (twisting oakum D01G35/00; crimping or curling of fibres, filaments, or yarns D02G1/00)

## Abstract

Open-end spinning device, including a rotor housing, a spinning rotor being disposed in the rotor housing and having an inner surface, a housing cover having a fiber feeding channel formed therein, a thread delivery orifice being at least partly disposed in the cover and having a hard and wear-resistant material surface at thread deflection locations, and a surface layer of wear-resistant material disposed on the inner surface of the spinning rotor, the surface layer having areas of different wearability distributed therein.

## Claims

### Claim 1

Open-end spinning device, comprising a rotor housing, a spinning rotor being disposed in said rotor housing and having a pot-shaped inner surface, a housing cover having a fiber feeding channel formed therein, a thread delivery orifice being at least partly disposed in said cover and having a hard and wear-resistant material surface at thread deflection locations, and a surface layer of wear-resistant material completely covering said pot-shaped inner surface of said spinning rotor and being disposed on said thread delivery orifice, said surface layer having areas of different wearability distributed therein.

### Claim 2 (depends on 1)

Open-end spinning device according to claim 1, wherein said areas of different wearability are insular granular islands having distinct boundaries.

### Claim 3 (depends on 1)

Open-end spinning device according to claim 1, wherein said surface layer has pores formed therein forming said areas of different wearability.

### Claim 4

Open-end spinning device, comprising a rotor housing, a spinning rotor being disposed in said rotor housing and having an inner surface, a housing cover having a fiber feeding channel formed therein, a thread delivery orifice being at least partly disposed in said cover and having a hard and wear-resistant material surface at thread deflection locations, and a surface layer of wear-resistant material disposed on said inner surface of said spinning rotor, said surface layer having areas of different wearability distributed therein, said surface layer having pores formed therein forming said areas of different wearability.

### Claim 5 (depends on 3, 4)

Open-end spinning device according to claim 3 or 4 including insular inclusions of attrition material in said pores.

### Claim 6 (depends on 1)

Open-end spinning device according to claim 1, wherein said areas include material from the group consisting of carbon and iron.

### Claim 7

Open-end spinning device, comprising a rotor housing, a spinning rotor being disposed in said rotor housing and having an inner surface, a housing cover having a fiber feeding channel formed therein, a thread delivery orifice being at least partly disposed in said cover and having a hard and water-resistant material surface at thread deflection locations, and a surface layer of wear-resistant material disposed on said inner surface of said spinning rotor, said surface layer having areas of different wearability distributed therein, said areas of different wearability being insular granular islands having distinct boundaries.

### Claim 8 (depends on 2, 7)

Open-end spinning device according to claim 2 or 7, wherein said areas include material from the group consisting of carbon and iron.

### Claim 9 (depends on 3, 4)

Open-end spinning device according to claim 3 or 4, wherein said areas includes material from the group consisting of carbon and iron.

### Claim 10 (depends on 5)

Open-end spinning device according to claim 5, wherein said attrition material includes material from the group consisting of carbon and iron.

### Claim 11 (depends on 1)

Open-end spinning device according to claim 1, wherein said wear-resistant material is formed of at least one material from the group consisting of carbides, borides and silicides.

### Claim 12 (depends on 11)

Open-end spinning device according to claim 11, wherein said carbides, borides and silicides include material from the group consisting of iron, chromium, nickel, titanium, molybdenum and tungsten.