Patent · US Expired

Needle print head

US4838714A · kind A · utility

1Cited by

9References

7Claims

0Family size

Assignee

Nixodorg Computer AG · DE

Inventors

Herbert C. Beck · Simpsonville, US
Karl-Heinz Anton · Paderborn, DE
Harald Homner · Paderborn, DE

Key dates

Filing date	Feb 17, 1988
Grant date	Jun 13, 1989
Priority date	—
Expiry date	Feb 17, 2008

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB41J2/275
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

In a needle print head including a plurality of hinged armature magnets arranged in a ring about a needle guide with each of the magnets including a U-shaped magnet yoke, a magnet coil on one of the U-legs of such yoke and a hinged armature arranged at least nearly radially, the hinged armature at its radially inner end is connected to a print needle and is biased by spring force to a rest position away from the yoke at which it engages a stop, each hinged armature at its radially outer end being pivotally supported by a cylindrical pin for rotation about the axis of the pin, and a return spring engaging the hinged armature at a point between the print needle and the radially inner yoke leg.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.