Camera with film-door-lock indicator

A camera comprising a main body part having a cartridge receiving chamber for a film cartridge with a film leader that can be advanced from the film cartridge in preparation for film exposure and can be wound into the film cartridge after film exposure, a rear housing part, a film pressure platen between said main body part and said rear cover part, a film door movable open to open said chamber and movable closed to close said chamber, and a door lock movable to lock said film door closed and movable to release said film door, is characterized in that:

• a pivotal film sensor on said main body part is originally positioned to be moved by the film leader as the film leader is advanced from the film cartridge;
• said door lock is pivotally connected to said pressure platen between said pressure platen and said rear cover part;
• and
• a pivotal dual purpose indicator and blocker between said rear housing part and said film pressure platen is coaxially connected to said film sensor to be moved to block said door lock from being moved to release said film door and to provide a visible indication when said film sensor is moved by the film leader, whereby said dual purpose indicator and blocker prevents said film door from being opened and warns that the film leader has been advanced from the film cartridge in preparation for film exposure.