Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent
1991-04-30
1992-06-02
Burr, Edgar S.
Typewriting machines
Typing by other than type-face or type-die
Character formation by impact
400121, 101 9305, B41J 912, B41J 225
Patent
active
051182106
ABSTRACT:
Print hammers in a printing head of a dot line printer for printing with an ink ribbon multiple dot lines in a single shuttling direction and for providing a character line by the combination of the multiple dot lines in accordance with reciprocal motions of the print head while feeding a printing sheet in a line to line direction include hammer springs and printing pins provided at the free tip end portions of the springs. The printing pins are positioned offset from one another in the shuttling direction to thus perform multiple dot line printings in the single shuttling motion. Each of the printing pins has a printing pin surface in abutment with the printing sheet through the ink ribbon. The printing pin surface has a polygonal shape defined by a combination of ridge lines. All ridge lines extend obliquely with respect to the shuttling direction for facilitating grinding of the printing pins.
REFERENCES:
patent: 4889052 (1989-12-01), Matsumoto et al.
IBM Technical Disclosure Bulletin vol. 31, No. 1 Jun. 1988 "Pin Arrangement of Shuttle Printhead".
IBM Technical Disclosure Bulletin vol. 27, No. 2 Jul. 1984.
Kobayashi Hirotaka
Kugai Kenichi
Burr Edgar S.
Hitachi Koki Co,. Ltd.
Nguyen Anthony
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