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:
Jun. 20, 2000
Filed:
Mar. 04, 1998
Tomoya Saeki, Niigata, JP;
Tadashi Mizoguchi, Niigata, JP;
Junichi Suetsugu, Niigata, JP;
Hitoshi Minemoto, Niigata, JP;
Hitoshi Takemoto, Niigata, JP;
Kazuo Shima, Niigata, JP;
Yoshihiro Hagiwara, Niigata, JP;
Toru Yakushiji, Niigata, JP;
NEC Corporation, , JP;
Abstract
A capacitance is detected between an ejecting electrode and an opposite electrode by a capacitance detecting circuit with a recording medium placed on the opposite electrode. An electric field strength in the ejecting electrode is calculated by a gap adjustment control circuit based upon the detected capacitance. A motor driving circuit is controlled so that the electric field strength is set to a preset value. A lead screw coupled to the ejecting electrode is rotated by a motor and a gap between the ejecting electrode and the opposite electrode is thereby adjusted. Even if the thickness of a used recording medium changes, the ejecting electric field strength is kept stable and the recording quality is stabilized.