A photographic processing fluid spread system, for use with integral type self-processable film unit, by which the thickness of a layer of processing fluid is controlled and restricted in a uniform manner as the processing fluid is spread across preselected portions of the film unit, while the film unit...http://www.google.com.tw/patents/US6417911?utm_source=gb-gplus-share專利 US6417911 - Processing fluid spread system for an electronic photographic printer and camera and related method thereof
