DEVICE FOR POSITIONING A MEMBER FACING EACH OF THE PERFORATIONS OF A PERFORATED PLATE IN ACCORDANCE WITH A GIVEN GRID

摘要

Apparatus for positioning a member facing each of the perforations in a plate which is perforated according to a given pattern, comprises a body having at least two engaging members, means for moving the members in a direction perpendiculr to the plate independently of one another whereby to introduce or remove them from a corresponding perforation, means for fixing each of the engaging members in a perforation, and means for moving one of the members with respect to the other.