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Title: Apparatus for measuring thickness differences in record carriers, such as bank notes and the like



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Claims: What is claimed is:

1. Apparatus for measuring thickness differences in record carriers, such as bank notes and the like, comprising, in combination, a roll mounted for rotation about an axis and having an elastic surface; a transducer defining a sensing axis mounted perpendicular to the axis of rotation of said roll and rigidly with respect to said roll axis; and a sensor mounted quasi-rigidly, with respect to said transducer, between said roll and said transducer and fixedly joined to said transducer; said sensor being so positioned that, in the quiescent condition of the arrangement without a record carrier being passed between said sensor and said roll, the spacing of said roll surface from said sensor is less than the smallest paper thickness to be measured.

2. A measuring apparatus according to claim 1 in which said transducer is a piezoelectic transducer.

3. A measuring apparatus, according to claim 1 in which said sensor is equipped with a sensing roll.

4. A measuring apparatus according to claim 1, including a transducer holder having a spring member fixedly joining said sensor to said transducer.

5. A measuring apparatus as claimed in claim 4, in which said transducer is a piezoelectric transducer.

6. A measuring apparatus according to claim 1, in which said sensor comprises a sensing runner having a sharp trailing edge.

7. A measuring apparatus according to claim 1, including an elastic damping plate connecting said transducer to said sensor.

8. A measuring apparatus according to claim 1, in which said transducer includes a pin.

Other info:


Inventors: Mitzel, Wilhelm (Neukaeferloh, DT)

Application Number: 704482
Filing Date: 1976-07-12
Publication_date: 1978-01-17
Assignee: G.A.O. Gesellschaft fur Automation und Organisation m.b.H. (DT)
Primary Class(es): 33/501.03 73/159, 209/534, 209/603
Other Classes:
US Patent Ref:
1453438May, 1923Butterfield et al.33/147.
2337064Dec, 1943Peters209/88.
2632545Mar, 1953Schubert209/88.
3763483Oct, 1973Urmenyi33/147.
3796094Mar, 1974Cook et al.73/94.
3899831Aug, 1975DeLeon33/143.
3919779Nov, 1975Piggott33/147.

Other Refs: 1,094,643
Dec, 1954FR

Primary Examiner: Aegerter, Richard E.
Assistant Examiner: Stearns, Richard R.
Attorney: McGlew and Tuttle