Process and apparatus for production and quality control in mult

Details Process and apparatus for production and quality control in mult Process and apparatus for production and quality control in mult

1988-03-18

1989-12-26

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

Monitor and control

57 81, 57265, 340677, D01H 1326, D01H 1344, D01H 1322

Patent

active

048889440

ABSTRACT:
A common monitoring system with a light beam is provided for a group of two or more production units arranged in a row. The beam passes through the thread balloon formed by the moving thread of each of these production units and is intermittently interrupted or attenuated by the moving thread in each balloon. The resulting shading is converted into an electric signal in a receiver of the monitoring system.
The threads of the individual production units can be identified by evaluating the relationships of amplitude, time and phase between the individual shading impulses.
The process enables on-line production and quality control to be carried out on multi-spindle textile machines such as ring spinning machines at an acceptable cost.

REFERENCES:
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patent: 4399648 (1983-08-01), Kato
patent: 4491831 (1985-01-01), Sakai et al.
patent: 4512028 (1985-04-01), Stutz

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