Matrix printer head having a removable assembly
AssigneeU.S. Philips Corporation
InventorHelfrid Kunath
Life of this patent
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Abstract
A matrix printer head having a plurality of mutually parallel, straight printing pins guided within at least two mating, semi-cylindrical rods. The rod outer surfaces guide armatures which are connected to the printing pins. Components which are subject to wear, such as the printing pins and the armatures, are easily replaced by removing the rods from the housing of the printer.
Claims7
A matrix printer head comprising a housing, a plurality of substantially straight printing pins having free ends for printing, means for mounting and guiding said pins in said housing so that said pins are mutually parallel and displaceable in their longitudinal direction, said free ends being arranged in a line, and magnetic means for displacing respective pins,
- wherein said head has a cylindrical bore extending in said longitudinal direction through said housing, and an axially removable assembly arranged in said bore, said pins and said mounting and guiding means forming part of said assembly;
- and
- said assembly comprises a cylindrical guide formed by at least two mating semi-cylindrical rods, said guide having a corresponding plurality of longitudinally extending adjacent guide means for said printing pins;
- means for retaining the assembly in the bore;
- a corresponding plurality of armatures forming part of said means for displacing, respectively slidably mounted at longitudinally separated locations on an outer surface of said cylindrical guide for displacement in said longitudinal direction, concentric with said bore;
- and means connecting individual printing pins to respective armatures for longitudinal displacement therewith.
Dependencies are inferred from the claim text.