Yarn-feeding apparatus and method for controlling it
US4628710A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 4, 1984 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Dec 4, 2004 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD04B35/12
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A yarn-feeding apparatus for selective positive feeding of several yarns to a knitting machine, comprising a sensor for generating sensor signals, the sensor signals representing the respective feeding condition or non-feeding condition of the yarns, and an error detection unit connected to the sensor for turning off the knitting machine in response to predetermined sensor signal combinations representing a yarn breakage and/or a yarn over-feed and/or a yarn change fault. For shortening the response time of the error detection unit and for enhancing the reliability thereof, the error detection unit comprises a working position sensing unit for generating position data representing the working position of the knitting machine, a logic circuit for deriving a yarn changing signal from the sensor signals, and a memory unit for storing yarn changing position data. The error detection unit determines whether the actual position data falls within a data range defined by the stored position data, and disenables the turning off of the knitting machine if the actual position data falls within the data range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.