Back to results
US 3,945,343 AGranted
Magnetic brush for use in magnetic printing
AssigneeGeneral Electric Company
InventorAmi E. Berkowitz
Life of this patent
Estimating the term…
Abstract
An improved magnetic brush for transferring toner to a latent image in a magnetic printing machine comprises a rotatable applicator cylinder disposed around a multipole magnetic stator. The two poles of the stator lying closest to the image are excited with magnetic fields of like polarity to minimize interaction between the magnetic brush field and the recorded magnetic image.
Claims8
An improved machine, adapted for applying and removing particulate, ferromagnetic toner onto a surface of a magnetic recording medium, of the type comprising a multi-pole stator of generally prismatic shape;
- a hollow applicator cylinder rotatably disposed around the stator;
- and means for exciting the poles of the stator with magnetic fields;
- wherein, as an improvement:
- said stator comprises a plurality of poles radially disposed about the axis of said cylinder;
- said plurality of poles comprises two principal poles, said principal poles being disposed closer to said surface of said recording medium than the remainder of said plurality of poles;
- said means adapted for exciting said principal poles with magnetic fields having like orientation.
3 more elements
Dependencies are inferred from the claim text.