Processing unit for developing photosensitive materials

A processing unit for photosensitive materials which have been exposed imagewise, comprising:

• an integral tank bottom member having at least three recesses and tank inserts inserted in said recesses to form three separate tanks to define three separate treatment zones for the photosensitive materials, one treatment zone in each tank, said tanks being adapted to receive and hold a treatment fluid for each treatment zone;
• means positioned in each of said treatment zones for applying a treatment fluid to both the top and bottom sides of the photosensitive material, wherein the applying means in the first treatment zone includes a cover which projects partially into the treatment fluid contained in the first tank;
• means, attached to said inserts which are selectively removable from each of said tanks, for transporting and guiding the photosensitive material through said treatment zones in a continuous manner, said guiding and transporting means including means for guiding the photosensitive material in a substantially straight line in the region of said means for applying treatment fluid in each of said treatment zones;
• and
• a housing top part having two separate feed slits for the photosensitive material, and first and second run-in tables inclined obliquely downwardly, said first run-in table being positioned to feed the photosensitive material via a first feed slit to said first treatment zone, and said second run-in table being positioned to transport the photosensitive material via the second feed slit to said second treatment zone.