9.5mm

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9.5mm is a non-theatrical format released by Pathé in 1922. The format is notable for its use of a single perforation located in the center of the frame. This maximized the surface area that could be used for the printed image, but increased the risk of damage to the center of the picture area.

Another unique feature of the format is ability to pause the film on intertitles in order to save footage. A notch was cut on a title frame, which would trigger a lateral tensioner below the gate. This caused the claw to retract for a short period, leaving the same frame in the gate until it reengaged.

Resources

Pathé Baby Projector Manual