Printing heads for printing machines

Claim 1

A printing head device including slidable elongate marker needle elements projectable against an anvil during striking a straight line of dots of a selected character, the device including a body having a longitudinal axis of symmetry, a plurality of electromagnets each having a frame mounted within said body and radially projecting towards said axis of symmetry, said frame including a blade-like armature extending radially towards said axis of symmetry and having a movable radially inner end, the inner ends of said armatures being centrally disposed in a circular array about the axis of symmetry of the said body; the needle elements directly cooperating at a first end with the respective inner ends of the armatures, and having at a second end, terminal portions parallel to said axis of symmetry, a supporting member secured to the said body, said supporting member including a rigid guide member for guiding said terminal portions in a common plane in which the adjacent terminal portions are adjoining each other; said supporting member further including first and second spaced further guide members for guiding and supporting the needle elements at first and second points intermediate between the first and second ends thereof; and lubricated exposed Bowden cable sheaths, each having first and second ends respectively secured to said first and second further guide members, said Bowden cable sheaths respectively surrounding the respective needle elements between said first and second points.