Patent ID: 7578665

Claim:
A drive transmission mechanism for transmitting torque between two or more parallel rotary shafts a first one of the parallel rotary shafts having a coupling affixed thereto for directly coupling the first shaft to a motor drive shaft, said drive transmission mechanism comprising: at least one magnetic drive disk affixed to each of the rotary shafts, each magnetic drive disk being comprised of a magnet carrier disk made of nonmagnetic material and having a plurality of magnets arranged on the magnet carrier disk circumferentially at equal spacing, wherein the at least one magnetic drive disk affixed to the first one of the parallel rotary shafts partially overlaps the at least one magnetic drive disk affixed to another of the parallel rotary shafts; and synchronization gears attached to the rotation shafts respectively to mesh with one another, at least one of the synchronization gears being made of plastic material; whereby torque transmission between the rotary shafts is carried out in two ways, via the magnetic drive disks without contact between the magnets and via the synchronization gears meshing with one another.