A shredding machine comprises a housing, a shredding mechanism, a motor for operation of the shredding mechanism, a slot through which documentary material is fed for shredding by the mechanism, and an operating member movable from an operative position in which it extends across the slot, to an inoperative...http://www.google.fr/patents/US6802465?utm_source=gb-gplus-shareBrevet US6802465 - Shredding machine, and method of providing a time delay in a shredding machine
Shredding machine, and method of providing a time delay in a shredding machine
