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:
Jan. 21, 2003
Filed:
Sep. 28, 2001
Aligning method for multiple ink jet color printheads with built-in optoelectronic position detector
Renato Conta, Ivrea, IT;
PierLuigi Soriani, Virgilio, IT;
Olivetti Tecnost S.p.A., Ivrea, IT;
Abstract
The single heads ( ) mounted on a single print carriage of an ink jet printer comprise a column ( ) of phototransistors ( - ), built directly into the chip of each head in the same process steps as used for the circuits for selecting and driving the actuating resistors; an illuminating device ( ) on board the printer focuses a light spot ( ) on the column ( ) of phototransistors ( - ) which, scanned in sequence, provide the electronic controller of the printer a video output ( ); from the output ( ), processing and computing means produce a measurement of the vertical and horizontal misalignment of each head ( ), a measurement used subsequently to automatically compensate this misalignment.