The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 12, 1985
Filed:
Jun. 05, 1984
Takeyoshi Tsuge, Mishima, JP;
Yoshiro Torisawa, Mishima, JP;
Ayumu Makino, Mishima, JP;
Tsutomu Kimura, deceased, late of Mishima, JP;
Tokyo Electric Co., Ltd., Tokyo, JP;
Abstract
An ink dot printer includes an ink tank having a magnetic ink supplying hole and an air opening; a pair of magnetic pole plates arranged to form a slit one end of which is immersed in magnetic ink in the ink tank; and an electromagnet for magnetizing the magnetic pole plates to introduce the magnetic ink in the ink tank into the slot to form a magnetic ink film. A plurality of needles arranged adjacent to one another along the longitudinal direction of the slit are each freely movable in its longitudinal direction between a first position where one end portion is immersed in the magnetic ink film in the slit, and a second position where the one end portion is projected from the magnetic ink film. Electromagnets selectively drive the needles to move them from the first position to the second position, wherein the needles selected force the magnetic ink adhered on their one ends at the first position, onto a recording paper to form dots of the magnetic ink. Characters thus are printed by groupings of the dots; and a magnet is provided for returning ink which remains in the slit to the ink tank when the pole plates are not in a magnetized state.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile