Field Service Manual December 2003
Page 59 of 276
Load process
Description of the different parts.
The drum: The goal is to wrap a medium like a photosensitive film around
the drum. This medium is held on the drum by a high vacuum. This is
needed because the drum spins at a high speed. During the spinning of the
drum, an image is written on the medium using a laser source that is
mounted on a carriage. This carriage travels from left to right, so in the
axial plane.
Take-over plate: The goal is to ensure that the medium has no tension
around the drum. Therefore this take-over plate is needed. This plate lies
parallel to the surface of the drum.
Air pipe: Just before the load process compressed air is pumped shortley
out of the tube to reduce the sticking of films.
Bottom plate of load cassette. Has four different fixed positions. Depending
on the filmsize around the drum. In inches: 24-25-26-27-28.
Film bridge: This device takes the film out of the load cassette and brings it
towards the drum. On the film bridge several suction caps, a take-over
cylinder and bridge sensor are mounted.
Take-over cylinder: This cylinder ensures that the film is tension free.
When the film bridge is in the up position, the position of this cylinder is
the same height as the take-over plate. At a certain time during the load
process, the film will be held on only one point .
Film size adapters: With three adapters the load cassette for different film
sizes can be adjusted.
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