Apparatus for automatic doffing and donning of tubes in a textile spinning or twisting machine
US4938017A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 1987 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Nov 20, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H9/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for automatically doffing fully wound bobbins simultaneously from the plural spindles of a textile spinning or twisting machine and subsequently donning empty tubes simultaneously onto the spindles. When doffing a fully wound bobbin from its supporting spindle, a trailing length of yarn from the doffed bobbin is helically placed about the spindle and, when subsequently donning an empty tube onto the spindle, the trailing yarn length is securely clamped at least partially between the empty tube and spindle, which trailing yarn length is automatically broken from the doffed bobbin upon its removal, to enable convenient automatic re-start of the machine. A respective gripping arrangement, having a pair of gripper assemblies, is associated with each spindle with a common drive being provided for the gripping arrangements to selectively position each pair of gripper assemblies alternately in position for alignment with the associated spindle for doffing and donning operation and another position spaced therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.