Cotton drafting frame
US5438733A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1992 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Dec 8, 2012 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H1/22
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A drafting frame includes first and second drafting roll pairs being spaced from one another consecutively in the direction of sliver advance and each being formed of two cooperating drafting rolls; first and second drive motors; a first torque transmitting arrangement connected to the first drive motor and to one of the drafting rolls of the first drafting roll pair for driving the first drafting roll pair in a forward sense for feeding the sliver in the direction of advance; a second torque transmitting arrangement connected to the second drive motor and to one of the drafting rolls of the second drafting roll pair for driving the second drafting roll pair in a forward sense for feeding the sliver in the direction of advance; an electronic regulating arrangement for regulating an rpm of at least one of the two drive motors for equalizing irregularities of the sliver; a first freewheel backstop for preventing a rotation of the first drafting roll pair in a reverse sense; and a second freewheel backstop for preventing a rotation of the second drafting roll pair in a reverse sense.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.