One or both ends of the connector bar is extended outwardly beyond the main section of the bar to which the attachments are mounted. The extended end provides access to the clip from the exterior of the attacher housing, permitting the clip to be manually advanced if the feed mechanism fails. An element...http://www.google.fr/patents/US5405070?utm_source=gb-gplus-shareBrevet US5405070 - Clip of attachments
