Electromagnetic Print Hammer Actuator
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
To prevent the armature from sticking to the electromagnetic yoke as a result of residual magnetism, one of these parts is plasma spray coated. The coating used is a nickel/aluminum layer followed by a TiO(2) layer which is subject to wear. It is also possible to use tungsten carbide, chromium carbon or titanium dioxide layers which are applied by flame plating.