(19)
(11) EP 4 417 432 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.10.2024 Bulletin 2024/43

(43) Date of publication A2:
21.08.2024 Bulletin 2024/34

(21) Application number: 24158333.5

(22) Date of filing: 19.02.2024
(51) International Patent Classification (IPC): 
B41J 2/21(2006.01)
B65B 61/26(2006.01)
 B41J 3/407(2006.01)
B41J 25/00(2006.01)
(52) Cooperative Patent Classification (CPC):
B41J 2/2146; B41J 2/2142; B65B 61/26; B41J 2025/008
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
GE KH MA MD TN

(30) Priority: 20.02.2023 EP 23157601

(71) Applicant: Tetra Laval Holdings & Finance S.A.
1009 Pully (CH)

(72) Inventors:
  • OLSSON, Sverker
    221 86 Lund (SE)
  • TARCZAL, Ferenc
    221 86 Lund (SE)

(74) Representative: Tetra Pak - Patent Attorneys SE 
AB Tetra Pak Patent Department Ruben Rausings gata
221 86 Lund
221 86 Lund (SE)

   


(54) METHOD FOR QUALITY INSPECTION OF NOZZLES OF AN INK-JET PRINT MODULE


(57) A method for quality inspection of nozzles of an ink-jet print module. The method comprises: forwarding a paperboard web continuously at a substantially constant speed in a machine direction; printing a decor layer on the paperboard web using the print module; and printing a test pattern comprising a test element on the paperboard web by activating a plurality of the nozzles, which are intended to be inspected. The test pattern has a fixed position in relation to the decor layer, and is indicative of the quality of each nozzle of the plurality of nozzles.










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Search report