Mark locator and method of using same

Claim 1

A mark locator having indicia thereon for verifying conformity of markings of a mail article as being within the limits of postal specifications, said markings comprising a series of parallel lines of predetermined width, length and spacing, comprising: a single rectangular transparent plate having opposed top and bottom edges and opposed side edges and having an upper and a lower surface, said upper and lower surfaces being parallel and planar; first and second planar, perpendicularly oriented edge surfaces comprising rectangular bar members fixed to the lower surface of said plate adjacent and parallel to two adjacent edges of said plate and lying in first and second planes, respectively, substantially perpendicular to a plane containing said lower surface; and indicia provided on said plate at predetermined locations defining an area relative to said first and second edge surfaces, said plate having coextensive first and second dimension lines of predetermined lengths parallel to said first edge surface and perpendicular to said second edge surface, said plate having a third dimension line of predetermined length parallel to said second edge surface and perpendicular to said first edge surface, said third dimension line extending from said first edge surface for a predetermined length and being in perpendicular relationship to said coextensive first and second dimension lines, said first dimension line extending from said second edge surface for a predetermined length to a point where the said second dimension line starts, said indicia comprising a replica of said markings, said replica being located in an area defined by said first edge surface, the length of said second dimension line and the length of said third dimension line, said plate having a pair of lines which overlie said first and second edge surfaces to define the position thereof.