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The dye chloro diane blue (CDB), which is manufactured and used in powder form, is stored as compressed pellets, bricks or cubes.
English (United States)
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Xerographic Photoconductor Manufacture
The dye chloro diane blue (CDB), which is manufactured and used in powder
form, is stored as compressed pellets, bricks or cubes.
The coating ink from which a xerographic photoconductor is manufactured is
a mixture of solvents, liquids and powdery solids, including CDB powder.
Storage and handling of this powder is simplified by compressing the powder into
l00-gram and 300-gram pellets.
Pelletizing is achieved by using a metal die and a ram which exerts a
pressure in the range of 750 psi on a pre-weighed CDB powder mass. The
resulting pellets are then stored in an air- and water-tight container.
When a coating ink is being mixed or formulated, the required number of
pellets, for example, enough pellets to equal 700 grams, is placed in a sealed
grinding mill. This mill converts the pellets back to a powder, and dispenses the
powder, through a sealed conduit, into the ink mixing chamber.
As a result, the space necessary to store the powder, as it awaits use, is
substantially reduced, and the manufacturing environment is not subjected to the
dust usually associated with dumping a bag of powder into the mixing chamber.