Method and apparatus for sensing the thickness of a fiber layer

Details Method and apparatus for sensing the thickness of a fiber layer Method and apparatus for sensing the thickness of a fiber layer

1975-10-29

1977-08-16

Queisser, Richard C.

Measuring and testing

With fluid pressure

Dimension, shape, or size

73159, G01B 1306

Patent

active

040417700

ABSTRACT:
A pneumatic measuring means is placed over the main cylinder to measure pressure variations due to changes in fiber layer thickness. The measured pressures are transmitted to a measuring and control means which compares the measured pressures to a pre-set value and produces a difference signal which is then used to control the card. The difference signal can be imposed on the supply means for the card, the doffing means or the drafting means.

REFERENCES:
patent: 3157915 (1964-11-01), Gilbo
patent: 3218844 (1965-11-01), Kleist et al.
patent: 3411352 (1968-11-01), Stoller
patent: 3496744 (1970-02-01), Mizuno et al.

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