Graphic Design & Printing Technology

(singke) #1

Reference Book


contact with the fountain roller. Turn the fountain roller knob by hand to
transfer fountain roller solution from the water fountain roller to the ductor
roller. When the form rollers are sufficiently damped stop the press, check the
dampeners on the form roller by touching it with your hands. Be sure the
ductor control lever is on. The dampening unit is now ready for use.
Attaching the plate
Always be sure the plate cylinder is clean and dry before attaching the plate.
Attach the gripper edge of the plate to the plate clamp. Hold the tail of the
plate square and tight with your right hand. Turn the handwheel clockwise
until the tail clamp is in position for attaching the plate. Hold the plate with
your left hand and bring the tail clamp upto position with your right hand.
Attach the plate to plate clamp. Tighten the plate clamp by turning the plate
clamp tightening dial clockwise.
Semi-auto plate loading:- In semi-auto plate loading the operator have to lift
the guard and put the lead edge of the plate into the clamp, then hit a button
and it does the rest.
Auto plate loading:- In autoplate loading, automatic plate changing can be
done, enabling the plate for the next product to be loaded while the press is
running. The full sequence of old plate removal and new plate loading requires
less than 30 seconds. This technology has a dramatic impact on labour
requirements, make ready waste
and press uptime.
Feeding the paper
Fanning the press sheets - Begin
the paper feeding process by
fanning the pile to remove any
statistic electricity that might be
holding individual sheets
together.
Adding paper to the feeder
section:- Place the pile in the
feeding section of the press slightly of center. Push the pile forward so that it
is squarely seated against the front plate of the feeder.
Using wedges to level the paper:- The top of the paper pile must be perfectly
level and parallel to the registration board. If the stock stacks insert wedges at
several points into the pile to make the top surface level.
Adjusting the pile height:- Adjust the pile height below the feeding mechanishm
(Sucker Feet). Feeding problems will result if pile height is not properly set.
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