B - Operations – Transporting – 41 – F
Patent
B - Operations, Transporting
41
F
26/112
B41F 27/02 (2006.01) B41F 27/06 (2006.01) B65H 81/00 (2006.01)
Patent
CA 1254726
Abstract A magnetic cylinder and plate for offset printing. The cylinder has annular magnets and pole pieces. The magnetic circuit is completed through a printing plate. The magnetic flux substantially saturates the pole pieces and plates. The area ratio of the pole pieces to the magnets is greater than about 0.45 to 1 and preferably about 0.6 to 1. In assembling the magnets and cylinder, the magnets are wrapped into slots between the pole pieces. The magnets are angularly displaced so that the leading magnet is positioned between the pole pieces before it is in proximity to the trailing magnet and de- magnetization of the magnets is minimized.
516923
Donnelley (r.r.) & Sons Company
Meredith & Finlayson
LandOfFree
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