Patent ID: 8844249
Filing Date: 2014-09-30
Classification: B65C,B65H,Y10T

Abstract:
1. A film supplying apparatus for supplying a film to a predetermined film delivery position in accordance with timing of a film delivery member receiving the film, the film delivery member receiving the film when passing through the film delivery position and delivering the film to a film processing apparatus, the film supplying apparatus comprising: an upstream belt conveying unit for conveying the film with a feed belt holding the film by suction, the upstream belt conveying unit driven by a servomotor; a downstream belt conveying unit for conveying the film that has been conveyed by the upstream belt conveying unit, to the film delivery position with feed belts holding the film by suction, the downstream belt conveying unit driven by a servomotor; a film detector for detecting the film that is being conveyed at a predetermined reference position; and a control unit for controlling operations of the upstream belt conveying unit and the downstream belt conveying unit, wherein a target amount of movement of the feed belt of the upstream belt conveying unit and a target amount of movement of the feed belts of the downstream belt conveying unit are set in advance in accordance with a position of the film delivery member, so that the film stops at, or enters at a low speed, the film delivery position when the film delivery member passes through the film delivery position, the control unit controls positioning of the servomotor so as to obtain the target amount of movement of the feed belt of the upstream belt conveying unit set in advance, and also controls positioning of the servomotor so as to obtain the target amount of movement of the feed belts of the downstream belt conveying unit set in advance, and if an actual amount of movement of the feed belts when the film defector has detected the film is different from the target amount of movement of the feed belts, it is determined that a shift has occurred in a position where the feed belts hold the film by suction, and the target amount of movement of the feed belts of the downstream belt conveying unit after the film has completely transferred to the feed belts of the downstream belt conveying unit is corrected on the basis of an amount of shift between the actual amount of movement of the feed belts and the target amount of movement thereof, so that the film is conveyed while a shift in timing of supplying the film caused by a shift in the film is modified.