Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent
1986-04-28
1988-02-09
Burr, Edgar S.
Typewriting machines
Typing by other than type-face or type-die
Character formation by impact
101 9305, B41J 312
Patent
active
047238542
ABSTRACT:
A dot-matrix print head including a plurality of armatures, each of which is connected at its distal end to a print wire and has at its proximal end a pair of lateral extensions which extend in lateral opposite directions from the proximal end. The print head includes a supporting device for supporting the armatures and the print wires such that the armatures are pivotable at the proximal ends to move the print wires endwise. The supporting device has a pair of first protrusions engaging a pair of lateral surfaces of the lateral extensions of each armature which face toward the distal end. The supporting device further has a second protrusion disposed between the first protrusions as seen in the lateral direction of the armature, the second support protrusion engaging an end surface of the proximal end of each armature. The first and second protrusions permit each armature to be pivoted about the proximal end while preventing the armature from being moved in its longitudinal direction. The armatures are driven by a drive which includes electromagnets corresponding to the armatures, so that the armatures are pivoted about their proximal ends, upon energization and deenergization of the electromagnets, thereby giving the print wires longitudinal movements for dot-matrix printing. The supporting device is located radially within the electromagnetic yoke.
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Kawai Takamitsu
Sakaida Atsuo
Brother Kogyo Kabushiki Kaisha
Burr Edgar S.
Wiecking David A.
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