Web position detecting method

Details Web position detecting method Web position detecting method

1989-11-17

1991-03-19

Williams, Hezron E.

Measuring and testing

With fluid pressure

Dimension, shape, or size

226 22, G01B 1300

Patent

active

050000322

ABSTRACT:
A web position detecting method and apparatus for a device which conveys a web floated with air streams jetted from air jetting holes. Pressure detecting units are positioned along both side edges of the web to detect the pressures of the air streams thereby to determine the position of the web in its widthwise direction by a difference of the pressures.

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patent: 3608797 (1971-09-01), Hindle et al.
patent: 3863491 (1975-02-01), Molins et al.

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