Bindery caliper

Details Bindery caliper Bindery caliper

1977-11-03

1979-10-09

Burr, Edgar S.

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270 56, 340675, B65A 3902

Patent

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041703464

ABSTRACT:
A bindery caliper is provided in the form of a non-contacting capacitive change measuring device capable of determining the page count of a multi-page stack with high sensitivity. The capacitance of a pair of plates between which the stack of pages is disposed sets the frequency of an oscillator which is sampled for a predetermined time period. The sampled pulses are counted and compared to a standard within tolerances, and the comparison determines whether the page count is satisfactory. Means for updating the standard value on the basis of accumulated measurements is also provided.

REFERENCES:
patent: 3400331 (1968-09-01), Harris
patent: 3561752 (1971-02-01), McCain
patent: 3609735 (1971-09-01), Dauterman

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