Matrix pin print head of the hinged-clapper-armature constructio

Details Matrix pin print head of the hinged-clapper-armature constructio Matrix pin print head of the hinged-clapper-armature constructio

1989-07-28

1991-03-19

Burr, Edgar S.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 228

Patent

active

050005936

ABSTRACT:
A clapper armature (3) is coordinated to each print pin (1) in a matrix pin print head of the clapper armature construction. A magnet yoke (10) is disposed opposite to each clapper armature (3), where one of the two magnet yoke arms (10a, 10b) is surrounded by an electromagnetic coil (2). The clapper armature (3) is supported between the magnet yoke (10) and an oppositely disposed support bearing (14) for tilting positions, which tilting positions correspond to the withdrawn and, respectively, front position of the print pin (1). The clapper armature (3) or the print pin (1) can be maintained in the withdrawn position in each case with a leg spring (16), where a first spring leg (16a) is supported against a print pin head or at the clapper armature (3), and where a second spring leg (16b) is supported on a print head case side (4). In order to furnish the clapper armature (3) or the print pin (1), respectively, with a more advantageous guide, the structure of the leg spring (16) has been improved in that all leg springs (16) are connected to each other and form a single-piece leg spring basket (17).

REFERENCES:
patent: 4447166 (1984-05-01), Ochiai et al.
patent: 4548521 (1985-10-01), Wirth
patent: 4669898 (1987-06-01), Yeh et al.
patent: 4697939 (1987-10-01), Ara
patent: 4728205 (1988-03-01), Hasumi et al.
patent: 4750259 (1988-06-01), Cattaneo
patent: 4792247 (1988-12-01), Sakaida et al.
patent: 4832515 (1989-05-01), Kawakami

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