Abstract: A scanner guide slides along a guide rail aligned with a scanning path of the scanner. A positioner with projections or holes on the guide rail cooperates with holes or projections in the guide to identify a position of the scanner within bounds equal to or less than a maximum scanning path. The scanner is swingable between a scanning position overlying a bar code and an upright non-use position displaced from the bar code scanning surface. A bar code of extended length can be precisely verified as well as a shorter bar code by the bar code reader.

Abstract: A scanner of a bar code verifier is provided with a viewing window that allows the operator to align the scanner and a bar code to be scanned by the scanner. However, such a viewing window also allows external light to enter the scanner and reduce the accuracy with which the bar code is verified. This problem is solved by a scanner 1 of a bar code verifier according to the invention provided with a blind shutter 8 that can selectively open or close the viewing window 7 so that, during the operation of reading and verifying the bar code, the viewing window 7 may be closed by the blind shutter 8 to improve the accuracy with which the bar code is verified.