Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent
1988-10-28
1991-07-23
Wiecking, David A.
Typewriting machines
Typing by other than type-face or type-die
Character formation by impact
400 56, 4001571, B41J 2295
Patent
active
050338838
ABSTRACT:
Dot-matrix printer for printing on a paper resting against a platen includes a bendable piezoelectric lamina which is supported along a first edge planar ferromagnetic member which is operatively connected to the bendable piezoelectric lamina at a region remote from the first edge, a dot print element mounted the movement of the bendable piezoelectric lamina along a line parallel to the plane of the planar ferromagnetic member, control means for generating first or second voltage signals for energizing the bendable piezoelectric lamina to cause the planar ferromagnetic member to assume a first or a second position, and electromagnetic means for applying a controllably variable magnetic force on the planar ferromagnetic member such that only when the planar ferromagnetic member is not in the first position is there sufficient force exerted by the dot print element to print on the record medium with the diameter of the dot being a function of the force.
REFERENCES:
patent: 3748613 (1973-07-01), Venker
patent: 3998153 (1976-12-01), Erhardt et al.
patent: 4557192 (1985-12-01), Dollenmayer
patent: 4708501 (1987-11-01), Takemoto
patent: 4886380 (1989-12-01), Chu
Kelley Steven S.
Primages Inc.
Wiecking David A.
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