US 10,889,111 B2
Method and printer for reducing intensity fluctuations
Ulrich Stoeckle, Munich (DE); Uwe Hofmann, Munich (DE); Hans Gollatz, Herkenbosch (NL); and Lars Joergens, Baldham (DE)
Assigned to Canon Production Printing Holding B.V., Venlo (NL)
Filed by Océ Holding B.V., Venlo (NL)
Filed on Oct. 17, 2018, as Appl. No. 16/162,834.
Claims priority of application No. 10 2017 124 112 (DE), filed on Oct. 17, 2017.
Prior Publication US 2019/0111675 A1, Apr. 18, 2019
Int. Cl. B41J 2/045 (2006.01); B41J 2/21 (2006.01); B41J 2/145 (2006.01); B41J 2/155 (2006.01)
CPC B41J 2/04596 (2013.01) [B41J 2/04581 (2013.01); B41J 2/04588 (2013.01); B41J 2/04593 (2013.01); B41J 2/145 (2013.01); B41J 2/155 (2013.01); B41J 2/2132 (2013.01); B41J 2/2146 (2013.01); B41J 2202/20 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An inkjet printer, comprising:
a print head including a central region having a plurality of central region nozzles and, at least at one edge, and an edge region having at least one first edge region nozzle, wherein no ink ejection is produced by the at least one first edge region nozzle in a printing operation of the inkjet printer, and wherein the at least one first edge region nozzle is associated with no column of a print image in the printing operation of the inkjet printer; and
a controller that, in the printing operation, is configured to simultaneously:
(a) activate different central region nozzles of the plurality of central region nozzles based on print data for respective different columns of the print image to print dots of the print image, line by line, onto a recording medium; and
(b) activate the at least one first edge region nozzle, during the activation of the different central region nozzles for printing of the print image, with a non-ejection pulse without ink ejection such that no single dot of the print image is printed by the at least one first edge region nozzle.