Patent ID: 6821035
Filing Date: 2004-11-23
Classification: B41J

Abstract:
A line printer comprising:a hammerbank with print hammers arrayed in adjacent relationship along said hammerbank having tips for impacting a print ribbon to print on an adjacent media; a permanent magnet for retaining said print hammers; a first pair of pole pieces in a magnetic circuit wherein said pole pieces of the first pair each have an end in associated relationship with one of said hammers with one pole piece of the first pair having a different configuration than the other pole piece of the first pair; a second pair of pole pieces in a magnetic circuit wherein said pole pieces of the second pair each have an end in associated relationship with a second one of said hammers with one pole piece of the second pair having a different configuration than the other pole piece of the second pair, and wherein the second one of the pole pieces of the second pair located directly adjacent and between the first pair of pole pieces; and coils wrapped around each of said pole pieces.