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:
Aug. 19, 2014
Filed:
Sep. 06, 2013
Zamtec Limited, Dublin, IE;
Peter Allworth, North Ryde, AU;
Matthew Baker, North Ryde, AU;
Memjet Technology Ltd., Dublin, IE;
Abstract
A method of identifying defective nozzles of a printhead. The method includes the steps of: (i) instructing each nozzle in one ink plane of the printhead to print a respective coded line pattern, each coded line pattern being represented by a column of printed pixels and absent pixels, the coded line patterns being defined by first and second coding schemes encoding a position of each nozzle within its respective cell and a position of each cell within its respective ink plane; (ii) firing each nozzle of the ink plane to print a test pattern comprising a plurality of neighboring coded line patterns; (iii) imaging an area of the test pattern to obtain an imaged test pattern; (iv) decoding the imaged test pattern using the first and second coding schemes; and (iv) identifying the defective nozzles using the decoded imaged test pattern.