
Posted: Fri Dec 23, 2011 7:19 am
A Graphic (spring) back has a ground glass focus panel mounted with a flat spring top and bottom over the film gate. The film holder slides between the focus panel and the camera back and is held in place by spring tension of the focus panel. The entry side of the camera back has a V shaped grove that runs along the outer edge of the film opening and the film holder has a rib that mates with the grove when it has been inserted fully into the camera. This forms the light trap. The film holder should have a second rib that fits against the outer edge of the camera body. Some older film holders may have only the inner rib and may cause a light leak.
A Graflex back has on focus panel. A ground glass panel was available as an option and was attached to the back like a film holder. The Graflex back will have a solid bar across one long side of the film opening in the camera back and a movable one on the other side. The right end of the film opening will have a raised edge of the camera back that fits into a grove in the film holder to form a light trap. The film holders will have a single groove along each long side to fit the fixed and sliding bars.
Sounds like yours has the Graflex back.
A Graphic film holder is 4 x 5.565 inches outside ; a Graflex film holder will be wider and the same length.
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The manual only covers correct operation, yours is in a malfunction state.
The problem is similar to the one discussed here:
http://graflex.org/helpboard/viewtopic.php?t=6176
Please do not cut or grind off levers, taper pins, or screws.
The screws around the perimeter of the back may be different lengths. Pay attention to what length goes where when removing the back from your camera. The screw layout will be different from the Graflex. There should be 4 to 6 screws holding the back onto the camera. The curtain is either stuck to itself or is reverse wound on one of the rollers. I can unjam it but it may need a new curtain to work and may not work properly depending on the wear on the roller shafts, bushings, gears, and spring condition.
With the back off the camera and pulling with equal pressure on both sides of the curtain pull back on the M lever and coax the curtain off the roller. Pledge Natural Beauty , yellow spray can, softens the curtain. If its stuck to itself spray both sides of the curtain and let it sit for 15 to 30 minutes then try again.