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:
May. 19, 1998
Filed:
May. 09, 1995
Masaharu Yokono, Atsugi, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
There is provided an ink-type recording apparatus in which an intensity of light emitted by a photoelectric sensor is controlled to fall within an appropriate range so as to detect an ink-end mark at an appropriate sensitivity. A light-emitting element emits light toward a recording paper. A light-receiving element converts an intensity of the received light into an output current having a level corresponding to the intensity of the light. A current/voltage converting unit converts the output current into a voltage. A digitizing unit digitizes a level of the voltage into a digital value which is one of consecutive numbers from 0 to a predetermined maximum number. A ratio of the digital value to the predetermined maximum number is calculated. An input current supplied to the light-emitting element is varied so that an intensity of the light emitted by the light-emitting element is varied in accordance with the ratio.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile