Opening cylinder for open-end spinning machines
US4798046A · kind A · utility
Inventors
Key dates
| Filing date | Jul 7, 1986 |
| Grant date | Jan 17, 1989 |
| Priority date | — |
| Expiry date | Jul 7, 2006 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H4/32
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The opening cylinder comprising a cylindrical ring serving as a needle support and being provided with needle-housing bores extending from the inner ring surface to the outer one is designed to carry needles comprising a point section of generally tapered shape and a shaft section, the latter being pressed into and seated with force fit in a radially inner section of a corresponding one of said bores. A radially outer section of the bore surrounds a portion of said needle point section so as to form an annular groove therearound at the orifice of the bore in the outer ring surface. The radially inner section of the bore or at least part thereof has a diameter which is at least as great as the diameter of the outer section of the bore in the range of its orifice in the outer ring surface. This ensures having a simple and inexpensive needle mounting which a precise positioning of the needle tips protruding above the outer ring surface and with a secure holding of the needle shaft sections not only by press fit, but also by form fit connection due to the expansion of the inner bore section receiving the needle shaft section and the correspondingly lesser diameter of the outer bore sec…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.