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. 29, 1985
Filed:
Apr. 18, 1984
Masayoshi Tamai, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A drop sensor for an ink jet printer for determining the two-dimensional position of an ink drop as it flies through the sensor. A plurality of light emitting elements emit light beams which cross in pairs in the space defined by the sensor. A plurality of light receiving elements are aligned to receive the light beams projected from specific light emitting elements and to generate signals having magnitudes proportional to the intensities of the light received by the light receiving elements. A plurality of differential amplifier circuits compare the outputs of adjacent light receiving elements to determine whether an ink drop is coincident with selected matrix points within the sensor.