A reusable mandrel for use in a printing press

B - Operations – Transporting – 41 – F

Patent

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Details

B41F 21/00 (2006.01) B41F 13/08 (2006.01) B41F 27/10 (2006.01) B41F 27/12 (2006.01) B41F 30/06 (2006.01) B65H 27/00 (2006.01)

Patent

CA 2220842

A reusable mandrel for use in a plate cylinder of a printing press. The reusable mandrel includes two semi-cylindrical shells spaced slightly apart to form a tube having two opposing longitudinal slots. Disposed inside the tube is a controller that may be activated in order to selectively adjust the diameter of the tube. The tube is preferably set at an initial diameter so that the tube may incrementally accept plate material from a supply mandrel. Thereafter, the controller may be activated in order to decrease the diameter of the tube so that the tube may be removed from a spool of used plate material.

Mandrin réutilisable pour un cylindre porte-plaque d'une presse à imprimer. Il comprend deux enveloppes semi-cylindriques espacées légèrement pour former un tube ayant deux fentes longitudinales opposées. € l'intérieur du tube se trouve un contrôleur qui peut être mis en marche de façon à régler sélectivement le diamètre du tube. Le tube est réglé de préférence à un diamètre initial de façon à pouvoir accepter de façon incrémentale le matériau de plaque d'un mandrin d'alimentation. Par la suite, le contrôleur peut être mis en marche afin de réduire le diamètre du tube et, ainsi pouvoir le retirer d'une bobine de matériau de plaque usé.

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