Perforation gauge for postage stamps

Details Perforation gauge for postage stamps Perforation gauge for postage stamps

1987-07-02

1988-12-27

Martin, Jr., William D.

Geometrical instruments

Gauge

Postage stamp or mechanical coupling gauge

33 1BB, G01B 500

Patent

active

047930705

ABSTRACT:
A measuring plate (10) supports successive rows of perforation fingers (24i-k) on its upper side, the spacing and diameter of which respectively correspond to the perforations of a postage stamp. By laying .the postage stamp on a row of perforation fingers (22i), the conformity of the postage stamp perforations and measuring perforations can be checked in a tactile manner. The measuring plate (10) is connected by way of a hinge (30 to 34) to a trough-like lid member (12), which can be used for checking water-marks. The measuring plate (10) and lid member (12) together form a flat carrying case for postage stamps.

REFERENCES:
patent: 2054697 (1936-09-01), Fiala
patent: 2272967 (1942-02-01), Desmond
patent: 4217697 (1980-08-01), Schneider

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