Patent ID: 6034457
Filing Date: 2000-03-07
Classification: H02K

Abstract:
A magnetic drive apparatus for web transport comprising:a frame;a first rotatable element and a second rotatable element each supported in said frame in a magnetically coupled, spaced apart relations forming a substantially uniform nip therebetween for conveying a contacting web therethrough;wherein said first rotatable element comprises a first magnetic core and a first media bearing surface at least partially surrounding said first magnetic core, said first media bearing surface comprising a mixture of a polymeric matrix and a hard, inorganic particulate material, said first rotatable element further comprising integral thereto a ferromagnetic stator member operably fitted about a circumference of the first rotatable element, said ferromagnetic stator member having a plurality of spatially separated pole teeth, each of said pole teeth having an operably connected coil arranged for producing rotation of said first rotatable element, said coils being energized by a source of energy, wherein rotation of said first rotatable element causes rotation of second magnetic core, which rotation simultaneously causes synchronous rotation of said second rotatable element; and,wherein said second rotatable element comprises a second magnetic core and a second media bearing surface at least partially surrounding said second magnetic core, said second media bearing surface comprising a mixture of a polymeric matrix and a hard, inorganic particulate material.