To prevent armatures from resisting the feeding of a film and the film from being damaged by making a detecting part composed of a member different from a first armature main body, as a conductive rolling member coming into rolling contact with a film surface.
First and second armatures 21 and 22 are constituted so that their top end parts 21e and 22e are located on the rear and front sides of the orbit of the advancement of a perforation at the time of feeding the film F, across it respectively. A metallic ball 24 is held in the hole 15a of a pressure plate 15, as the detecting part different from the main body of the first armature 21 and the top end part 21e of the main body of the first armature 21 and the top end part 22e of the second armature 22 come into press-contact with each other from both sides. Only when the perforation comes to the position of the metallic ball 24, this ball 24 passes through the perforation and the press- contact with the second armature 22 is obtained to make the armatures 21 and 22 conductive with each other, so that the perforation can be detected by the conduction.
CHIGASAKI KATSUAKI
CHIN SEIEN
CHIN MEIKEN
TAKU TSUGUSHIGE
SHINFU SEIMITSU KOGAKU KOFUN Y