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A REFLECTIVE SCANNER

IP.com Disclosure Number: IPCOM000023099D
Original Publication Date: 1976-Aug-31
Included in the Prior Art Database: 2004-Mar-27

Publishing Venue

Xerox Disclosure Journal

Abstract

A scanner 10 includes a pair of sensing units for detecting marks on paper 12, on closely spaced tracks, as the paper is moved with respect to the sensing units. Structurally, the scanner includes a housing 13 having a flat surface 14 and a flat transparent plate 21 fixed on one side against the flat surface. Each sensing unit includes a first bore 15 perpen~' dicularly communicating with the flat surface, and a second bore 18 communicating with the plate at an acute angle, the axes of the bores theoretically intersecting at a point on