Pitch match detecting and counting system

Details Pitch match detecting and counting system Pitch match detecting and counting system

1987-06-12

1988-09-13

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Counting animate or inanimate entities

377 28, G06M 900

Patent

active

047714433

ABSTRACT:
An apparatus for automatically counting stacked sheet-like materials having sheet-to-sheet brightness gradients alternating between positive and negative while simultaneously eliminating problems encountered when the sheet edge reflectance characteristics have combined lambertian and specular reflective natures. Rectification of a pitch matched sensor arrays data output combined with a selective disposition of the sensor and illumination optical components relative to the sheet edges to be counted based upon the maximum acceptance angle of the optical system yields the improved count data necessary to achieve accurate counting.

REFERENCES:
patent: Re27869 (1974-01-01), Willits et al.
patent: 3157798 (1964-11-01), Anderson et al.
patent: 3324311 (1967-06-01), Jenkinson
patent: 3813523 (1974-05-01), Mohan et al.
patent: 3835306 (1974-09-01), Bills et al.
patent: 4373135 (1983-02-01), Mohan et al.
patent: 4542470 (1985-09-01), Mohan et al.

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