US 12,454,127 B2
Ink jet maintenance spit pattern
Albertine P. Wijnheijmer, Venlo (NL); Bart Teussink, Venlo (NL); Johannes A.T. Gollatz, Venlo (NL); Jacques J.M. Geraets, Venlo (NL); and Gerhardus R.B. Leus, Venlo (NL)
Assigned to Canon Production Printing Holding B.V., Venlo (NL)
Filed by Canon Production Printing Holding B.V., Venlo (NL)
Filed on Apr. 17, 2023, as Appl. No. 18/135,443.
Application 18/135,443 is a continuation of application No. PCT/EP2021/079807, filed on Oct. 27, 2021.
Claims priority of application No. 20204756 (EP), filed on Oct. 29, 2020.
Prior Publication US 2023/0271414 A1, Aug. 31, 2023
Int. Cl. B41J 2/045 (2006.01); B41J 2/165 (2006.01)
CPC B41J 2/04516 (2013.01) [B41J 2/04586 (2013.01); B41J 2/16526 (2013.01); B41J 2/16529 (2024.05)] 17 Claims
OG exemplary drawing
 
1. A method of ink jet printing using an ink jet imaging device comprising a plurality of nozzles arranged for expelling droplets of an ink by actuation of an ink channel, the method comprising the steps of:
a) providing a bit map of a spit pattern comprising an arrangement of refresh dots to be printed by each of the plurality of nozzles; and
d) printing a bitmap of the spit pattern,
wherein the spit pattern comprises a plurality of clusters of refresh dots, each cluster comprising at least two sequential refresh dots expelled from a single nozzle, the at least two sequential refresh dots expelled sequentially from the single nozzle with no dots of the refresh dots being expelled between a first time of the expulsion of a first of the at least two sequential refresh dots and a second time of the expulsion of a second of the at least two sequential refresh dots.