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. 30, 1992
Filed:
Jul. 03, 1990
Applicant:
Inventor:
Mitsutoyo Kikuno, Tokyo, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
3461 / ; 377 54 ; 377 67 ;
Abstract
An optical printer with a print head having numerous light emitting elements for reproducing medium densities of a multi-tone document image faithfully. When image data are inputted to individual serial shift registers, the entry of next image data is inhibited and, in response to a clock signal having a predetermined frequency, light emitting elements associated one-to-one with the shift registers are each turned on for a particular period of time associated with a logical value of an internal state stored in the associated shift register. The frequency of the clock signal is variable to adjust the turn-on time of the light emitting elements as desired.