Claims
- 1. A magnetic brush development roller assembly for an electrographic printer, comprising:
- a) a cylindrical multipole magnet mounted for rotation about a cylindrical axis; and
- b) a stationary shell surrounding the multipole magnet, the shell defining an axial slot for receiving an imaging head, and having an increased thickness in the neighborhood of the slot and a reduced thickness in a neighborhood diametrically opposite the slot, whereby eddy currents generated by rotation of the magnet within the shell and hence drag on the magnet are reduced.
- 2. The magnetic brush development roller assembly claimed in claim 1, wherein the shell is non-magnetic stainless steel.
- 3. The magnetic brush development roller assembly claimed in claim 1, wherein the neighborhood of increased thickness is two times the thickness of the neighborhood of decreased thickness.
CROSS-REFERENCE TO RELATED APPLICATIONS
Reference is made to U.S. Ser. No. 08/294,294, filed Aug. 23, 1994, now abandoned on Dec. 31, 1996, entitled "Electrographic Printing Process and Apparatus" by William Mey et al., and to Ser. No. 08/620,655, filed Mar. 22, 1996, entitled "MICROCHANNEL PRINT HEAD FOR ELECTROGRAPHIC PRINTER" by William Grande, et al.
US Referenced Citations (5)