Printer guide member

Details Printer guide member Printer guide member

1985-09-19

1988-01-19

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, 501 97, B41J 312, C04B 3558

Patent

active

047202017

ABSTRACT:
A printer guide member for guiding print wires in a dot matrix printer, which comprises a thin ceramic sintered body containing 60% by weight or more of Si.sub.3 N.sub.4 and having a plurality of guide holes perforated therethrough. In addition to Si.sub.3 N.sub.4, this thin ceramic sintered body further includes (a) not more 10% by weight of Al.sub.2 O.sub.3 and (B) at least one component as an additive selected from the group consisting of (i) not more than 10% by weight of a rare earth element oxide, (ii) not more than 10% by weight of AlN, and (iii) not more than 10% by weight of at least one oxide selected from the group consisting of TiO.sub.2, MgO and ZrO.sub.2.

REFERENCES:
patent: 4459363 (1984-07-01), Holt
patent: 4547470 (1985-10-01), Tanase

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