Device for treating the surface of an article in connection with printing

摘要

The invention relates to a device and method for treating the surface of an article in connection with printing. More particularly, the invention relates to a method and device, which is capable of checking the motion of a roller in a device for fixing toner on printed sheet or web material using a magnet and a magnetic sensitive element located in a fixed position near the rotating element so as to sense the passage of at least a pole thereof at each rotation of the magnet.