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1. (WO2018140027) PRINT HEAD NOZZLE SPITTING

Pub. No.:    WO/2018/140027    International Application No.:    PCT/US2017/015285
Publication Date: Fri Aug 03 01:59:59 CEST 2018 International Filing Date: Sat Jan 28 00:59:59 CET 2017
IPC: B41J 2/11
B41J 2/155
B41J 2/17
Applicants: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventors: GRACIA VERDUGO, Antonio
COSTAL FORNELLS, Pau
GUILLO, Norman
Title: PRINT HEAD NOZZLE SPITTING
Abstract:
A method is disclosed. The method may involve obtaining information indicative of a number of printing passes of a print head to print a swath on a printable medium. The method may comprise determining that the print head is to perform a particular printing pass which is one of: a printing pass during which an amount of print agent to be deposited from nozzles of the print head differs, by an amount that exceeds a defined threshold, from an amount of print agent to be deposited from the nozzles during a printing pass immediately preceding said particular printing pass; and a printing pass to print a swath which is the first of a plurality of adjacent swaths in which each swath has an area coverage exceeding a defined threshold. The method may comprise preparing, based on said obtained information, a schedule for a nozzle spitting procedure to commence before the print head performs the particular printing pass.