Title:
PRINTING HEAD FOR WIRE DOT PRINTER
Document Type and Number:
Japanese Patent JPH01182059
Kind Code:
A
Abstract:
PURPOSE:To improve the efficiency by exciting a coil of a superconducting member in an electric resistance state being zero to magnetize the core and always attracting an armature. CONSTITUTION:An armature 6 holding printing wire 3 on one end, a leaf spring 7 with the armature 6 fixed to the one end, a core 13 opposed to the armature 6, a coil 18 of superconducting material and a coil 16 are the essential components. The coil 18 is provided in a winding state along the periphery of the cores 13 arranged radially to form a circle for simultaneous excitation of said cores 13. In addition, the coil 18 of superconducting member is cooled by a cooling device and therefore, its electric resistance is zero. All the cores are magnetized by exciting the coil 18 of superconducting to keep the armature attracted always. After this, the coil 16 wound around each core 13 is selectively excited so that the pole of the core 13 is reversed to cancel the attractive force of the core 13.
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Inventors:
TANIDA TOSHIFUMI
Application Number:
JP770188A
Publication Date:
July 19, 1989
Filing Date:
January 18, 1988
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
B41J2/485; B41J2/27; B41J2/28; (IPC1-7): B41J3/10
Attorney, Agent or Firm:
Sadaichi Igita
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