Serial Printhead Having Linac Technology
Original Publication Date: 1989-Jan-01
Included in the Prior Art Database: 2005-Jan-27
The disclosed invention provides several improvements for existing serial printheads. The improvements include the combination of a low mass hammer with a damper, an efficient magnetic flow path resulting in sustained acceleration of the actuator shaft, and a simple assembly design that can be automated. (Image Omitted) As illustrated in Fig. 1, the printhead assembly comprises 9 stators 1 and 9 print wires 2. As shown in Fig. 2, each stator 1 comprises a hammer assembly 3 that oscillates up and down in response to a magnetic field formed inside the stator. For each stator in the printhead assembly, there is a stand 4 on which is mounted a leaf spring 5 which supports an arm 6 of the hammer assembly 3 and presses it against the rear cover 7 in its rest position.