Yarn feeder with rotary storage drum and yarn-unwinding sensor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 22, 2017
Issued Date -
N/A
app pub date -
Sep 8, 2015
filing date -
Sep 5, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A motorized rotary drum supported on a motor housing bears a plurality of yarn loops wound thereon, such loops being adapted to be unwound upon request from a downstream machine. A yarn-unwinding sensor comprises light-emitting elements and light-receiving elements both of which are integral with the motor housing. Light-guiding elements which are integral with the drum guide the light from the light-emitting elements to a window which is defined on the rotary drum in a position such that it is repeatedly engaged by the yarn during its rotary unwinding motion, and vice versa. A reflecting surface reflects the light coming out of the window back towards the window. Light-deviating elements which are integral with the motor housing deviate the light coming back from the window towards the light-receiving elements. The unwinding of a yarn loop from the drum is determined on the basis of the variation of light resulting from the yarn transiting on the window.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2015 Application Filing Year
- D03D Class
- 219 Applications Filed
- 163 Patents Issued To-Date
- 74.43 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- D03D Class
- 0 % this patent is cited more than
- 8 Age
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