photocopy machine having a feed module for successively feeding individual original documents from a stack thereof . cooperating portions of the feed module and of the photocopying machine form a straight line original document feed path having an entryway that is accessible for conventional insertion of original documents . the feed module includes apparatus for successively feeding original documents from a stack along a direction reversing path that leads to the above entryway of the straight line feed path . the feed module can be pivoted to afford access to the straight line original document path and to permit copying of original documents which cannot be sheet fed . the feed module includes an original document separating arrangement wherein a feed tire and flanking retarder bars are cooperatively disposed so as to obviate need for any adjustment of the arrangement to afford proper feeding of documents of variable thickness .