Sheet thickness monitoring system and method

Details Sheet thickness monitoring system and method Sheet thickness monitoring system and method

1979-12-07

1981-06-09

Swisher, S. Clement

Measuring and testing

Sheet, woven fabric or fiber

33147L, G01B 506

Patent

active

042716993

ABSTRACT:
A sheet thickness monitoring system includes a motor driven threaded rod extending across a conveyor above the path of corrugated sheets fed by the conveyer; the rod supports transversely reciprocating first and second linear variable differential transformers each having a vertically movable armature with a roller on its lower end positioned to engage the sheets so that thickness variations in the sheets provide voltage variations from the transformers. Output voltage signals from the transformers are averaged over a predetermined time period and a warning signal is actuated when the average signal strength falls below a predetermined value.

REFERENCES:
patent: 3474668 (1969-10-01), Mangan
patent: 3552203 (1971-01-01), Freeh
patent: 3676933 (1972-07-01), Slone
patent: 3750294 (1973-08-01), Belke et al.

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