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:
Oct. 13, 1998
Filed:
Jan. 04, 1996
Tomoaki Nakano, Kawasaki, JP;
Tetsuro Hirota, Hadano, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A minimum per-time voltage-increase gradient during a time a driving voltage is being increased is not less than 1/8 a maximum per-time voltage-increase gradient during said time the driving voltage is being increased. A driving-voltage increase amount which the driving voltage is increased during a time, within a predetermined time, during which a per-time voltage-increase gradient is maintained at a maximum voltage is not less than 1/2 of a full driving-voltage increase amount which the driving voltage is increased during said predetermined time. When the driving voltage is decreased, a per-time voltage-decrease gradient when said voltage decrease is started is sharper than an average per-time voltage-decrease gradient, and a per-time voltage-decrease gradient when said voltage decrease is ended is less sharp than the average per-time voltage-decrease gradient. Further, a time during which a per-time voltage-decrease gradient is maintained less sharp than said average per-time voltage-decrease gradient is not less than 1/2 a full time during which the driving voltage is being decreased.