Apparatus for testing magnetic properties of sheet material such

Details Apparatus for testing magnetic properties of sheet material such Apparatus for testing magnetic properties of sheet material such

1996-01-16

1997-09-23

O'Shea, Sandra L.

Electricity: measuring and testing

Magnetic

Magnetic test structure elements

235449, G01R 3312, G06K 708

Patent

active

056708807

ABSTRACT:
For measuring magnetic properties of sheet material the sheet material is guided past a magnetic measuring system at a measuring distance defined between the sheet material and the magnetic measuring system. The sheet material is transported with a transport medium disposed between the measuring system and the sheet material. The measuring distance is determined substantially by the thickness of the transport medium. The thickness of the transport medium is selected to be smaller than a predetermined local resolution. If the local resolution is high enough it is also possible to detect magnetic printed images.

REFERENCES:
patent: 3218440 (1965-11-01), Albosta
patent: 4181920 (1980-01-01), Cerekas
patent: 4584529 (1986-04-01), Aoyama
patent: 4916295 (1990-04-01), Chominski
patent: 5473147 (1995-12-01), Hoshino et al.

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