Apparatus for conveying and rotating articles 90.degree. while being conveyed along a predetermined path with rotation being achieved by contacting a forward corner of the article for pivoting it partially as the extending side will be grasped by a side-facing belt to complete rotation and propel the...http://www.google.com/patents/US4085839?utm_source=gb-gplus-sharePatent US4085839 - Apparatus for conveying and turning articles
