Patent ID: 8657409
Filing Date: 2014-02-25
Classification: B41J,Y10T

Abstract:
1. A hammer bank, comprising: a back plate; a plurality of elongated pole pieces coupled to the back plate and extending forwardly from a front surface thereof, each pole piece having an electrical coil disposed about a circumfery thereof; a permanent magnet having a back surface coupled to the front surface of the back plate; a shunt fret defining a plurality of elongated, downwardly extending shunts and having a back surface coupled to a front surface of the permanent magnet; and a hammer fret having a back surface coupled to the front surface of the back plate and defining a plurality of elongated, upwardly extending hammers, each hammer being interdigitated between a pair of adjacent shunts and including an elongated spring portion having a hammer head disposed at an upper end thereof, each hammer head having a printing tip projecting forwardly therefrom.