Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent
1991-06-21
1993-06-01
Burr, Edgar S.
Typewriting machines
Typing by other than type-face or type-die
Character formation by impact
101 9305, B41J 223
Patent
active
052153908
ABSTRACT:
An electromagnetic drive (5) for longitudinal motions is in each case furnished for each print pin (3) in a matrix pin print head (1). Guide mouthpieces (9), movable back and forth or, respectively, up and down, are furnished for the generation of speed and letter-quality printing. A lifting magnet device (10) serves for two defined end positions of a magnet armature (11). In order to dispose the lifting magnet device (10) within the smallest possible space, i.e. as compact as possible, and in order to improve the switching frequency, the lifting magnet device (10) is altogether disposed and attached, respectively, in a region (15) immediately adjacent to the guide mouthpiece (9) and includes a magnet yoke (17) with two or several magnet poles (18, 19). An armature body (21) is movable back and forth or, respectively, up and down between the predetermined and coordinated distance (20) of two unlike magnet poles (18, 19) by switching on or switching off or by changing polarity of the switched on lifting magnet coil (22). The guide mouthpiece (9) is attached to the guided armature body (21).
REFERENCES:
patent: 4605323 (1986-08-01), Blanchard et al.
patent: 4629344 (1986-12-01), Niebel
patent: 4640633 (1987-02-01), Hebert
patent: 4854752 (1989-08-01), Rossopoulos
patent: 4929103 (1990-05-01), Hendrischk
Burr Edgar S.
Hendrickson Lynn D.
Kasper Horst M.
Mannesmann Aktiengesellschaft
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