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1. WO2022010466 - DETECTING PRINTHEAD ISSUES

Publication Number WO/2022/010466
Publication Date 13.01.2022
International Application No. PCT/US2020/041130
International Filing Date 08.07.2020
IPC
B41J 29/38 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
29Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
38Drives, motors, controls, or automatic cut-off devices for the entire printing mechanism
B41J 29/393 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
29Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
38Drives, motors, controls, or automatic cut-off devices for the entire printing mechanism
393Devices for controlling or analysing the entire machine
B29C 64/30 2017.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
64Additive manufacturing, i.e. manufacturing of three-dimensional objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
30Auxiliary operations or equipment
B33Y 40/00 2020.1
BPERFORMING OPERATIONS; TRANSPORTING
33ADDITIVE MANUFACTURING TECHNOLOGY
YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
40Auxiliary operations or equipment, e.g. for material handling
Applicants
  • HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. [US]/[US]
Inventors
  • JOWKAR, Mohammad
  • GARCIA GARCIA, Luis
  • MANSELL, Rhys
Agents
  • GARDINER, Austin William
  • CARTER, Daniel J.
  • COSTALES, Shruti
  • GORDON, Erica
  • HOOPES, Benjamin
  • JENNEY, Michael
  • KO, Steve S.
  • KOKOSKA, Christopher E.
  • MAISAMI, Ceyda Azakli
  • MATHEW, Wilson T.
  • PERRY, Garry A.
  • SEARLE, Benjamin M.
  • SORENSEN, C. Blake
  • SU, Benjamin
  • WASSON, Robert D.
  • WOODWORTH, Jeffrey C.
  • WOJTALEWICZ, Kathy A.
Priority Data
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) DETECTING PRINTHEAD ISSUES
(FR) DÉTECTION DE PROBLÈMES DE TÊTE D'IMPRESSION
Abstract
(EN) According to one aspect, there is provided a method of detecting printhead issues in a printer. The method comprises obtaining an image to be printed, generating a first sub-pattern and a second sub-pattern, wherein the first sub-pattern in a pattern to be printed in a first pass comprising a pattern suitable to enable the detection of a printhead issue and wherein the second sub-pattern is the complementary pattern that completes the first sub-pattern such that printing the first and second sub-patterns is equivalent to printing the obtained image, printing the first sub-pattern on a print target, obtaining an image of the printed first sub-pattern, analysing the image of the printed first sub-pattern to determine the presence of a printhead issue and, where appropriate, performing a printhead maintenance operation, and printing the second sub-pattern on the print target.
(FR) Selon un aspect, la présente invention concerne un procédé de détection de problèmes de tête d'impression dans une imprimante. Le procédé consiste à obtenir une image à imprimer, à générer un premier sous-motif et un second sous-motif, le premier sous-motif dans un motif à imprimer dans un premier passage comprenant un motif approprié pour permettre la détection d'un problème de tête d'impression et le second sous-motif étant le motif complémentaire qui complète le premier sous-motif de telle sorte que l'impression des premier et second sous-motifs est équivalente à l'impression de l'image obtenue, à imprimer le premier sous-motif sur une cible d'impression, à obtenir une image du premier sous-motif imprimé, à analyser l'image du premier sous-motif imprimé pour déterminer la présence d'un problème de tête d'impression et, le cas échéant, à effectuer une opération de maintenance de tête d'impression, et à imprimer le second sous-motif sur la cible d'impression.
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