Magnetic printing unit for telecopying machine - has latent image formed on surface physically distant from printing head

摘要

A latent magnetic image is formed on a magnetic layer in a printing units esp. in a telefacsimile machine. The image is developed using finely divided magnetic material. The information content of the latent image (22) is produced by a signal controlled recording head or heads (48) magnetically coupled with the surface (46) which receives the magnetic powder. The head is physically separated from this surface and the design strongly limits the amount of powder between the surface and the head.