Photosensor equipped device for detecting perforations

A device for detecting perforations in film, the film including a section having a plurality of perforations disposed along a length of the film at determinable intervals, the film movable along a film path, comprising:

• body means having a rear and a body position setting portion provided rearward of said rear of said body means;
• pressure plate means disposed at the rear of the body means for maintaining the alignment of the film relative to the body means, said pressure plate means having a rear and a channel and a pressure plate position setting portion positioned in axial alignment with said body position setting portion;
• installation board means adjacent the rear of the pressure plate means and said installation board means having an installation board position setting portion positioned in axial alignment with said body position setting portion;
• and
• sensor means attached to the installation board means and disposed to face the section of the film having perforations through the channel of the pressure plate means as the film moves along the film path;
• whereby the sensor means transmits electronic signals corresponding to the position of the perforations of the film as the film moves along the film path.

A method of detecting perforations in film, the film including a section having a plurality of perforations disposed along a length of the film at determinable intervals, the film movable along a film path, said method comprising the steps of:

• aligning a body having a rear with a pressure plate disposed at the rear of the body and with an installation board disposed adjacent a rear of the pressure plate by aligning a body position setting portion provided rearward of the rear of the body with a pressure plate position setting portion and an installation board position setting portion along a common axis;
• maintaining the alignment of the film relative to said body with said pressure plate disposed at the rear of the body;
• sensing the perforations of the film with a sensor attached to said installation board adjacent the rear of the pressure plate, the sensor disposed to face the section of the film having perforations through the channel of the pressure plate as the film moves along the film path;
• and
• transmitting electronic signals corresponding to the position of the perforations of the film as the film moves along the film path.