Riso RZ5 Series, Technical Manual, Page: 128 / 410

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CHAPTER 10: MASTER REMOVAL SECTION
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Mechanism
1. Master Removal Mechanism
Master on the print drum is removed from the print drum and disposed in following sequence.
(1) At the start of master removal, the master sensor checks for the presence of master on the print drum as
the print drum makes one rotation.
(2) After the print drum returns to Position-B, the clamp unit operates to bring the clamp opening cam down.
The print drum rotates to position-A and both the clamp plate and the master release bar opens up to
release the master out from the clamp plate of the print drum. The print drum does not stop at position-A,
but continues its rotation.
(3) The master removal roller rotates and catches the leading edge of the master and pulls the master away
from the print drum as the print drum continues to rotate.
(4) As the whole length of the removed master enters into the master disposal box, the master compressing
plate pushes the removed master deep into the master disposal box.
* Above step-(1) is made only when the machine does not have the memory of the master on the drum.
* Even with no master is found on the drum, the master removal action takes place, except that the master
removal sensor detection is not functional.
* Both the master compressing action and master loading action takes place at the same time, with the
master-guiding-plate in its lowered position. The master-guiding -plate in this lowered position prevents
the tail edge of the master being loaded on the print drum from touching the master removal rollers and
getting the ink transferred.
1001
1002
1003
Master sensor
Master release bar
Master disposal box
Master disposal box
Master compression plate
Master-guiding-plate
Tail edge of the master being
wrapped around the print drum.