Thickness gauge for moving sheet material with inner and outer f

Details Thickness gauge for moving sheet material with inner and outer f Thickness gauge for moving sheet material with inner and outer f

1989-03-22

1990-05-29

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

73159, 162263, G01B 710, D21F 706, G01R 3312

Patent

active

049298950

ABSTRACT:
A caliper gauge for relatively thin moving sheet material is provided by the use of an outer ring type air bearing, flexibly supported, which is flexibly connected again to an inner air bearing carrying the magnetic measuring components. The outer air bearing (with its juxtaposed mate) tends to flatten the sheet so that minimum movement is required of the independently actuated inner air bearing. Thus, great accuracy is achieved and tearing or marking of the sheet material, such as super calendered or coated grades of paper, is avoided.

REFERENCES:
patent: 3528002 (1970-09-01), Dunlavey
patent: 3818327 (1974-06-01), Alexander
patent: 3828248 (1974-08-01), Wennerberg
patent: 3855524 (1974-12-01), Crawford
patent: 4107606 (1978-08-01), Typpo et al.
patent: 4107847 (1978-08-01), Typpo et al.
patent: 4791367 (1988-12-01), Typpo

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