Ink cartridge plunger

Details Ink cartridge plunger Ink cartridge plunger

B - Operations, Transporting

41

F

B41F 31/08 (2006.01)

Patent

CA 2452762

An improved plunger (40) for a lithographic printing ink cartridge prevents air entrapment between the plunger (40) and the ink when the plunger (40) is pressed into the ink during cartridge assembly. The plunger bottom portion (42) has a positive radius and a textured surface that facilitates the flow of air away from the center (46) of the plunger toward the cartridge sidewall (44) as the plunger (40) is pressed into the ink.

L'invention concerne un piston (40) amélioré destiné à une cartouche d'encre pour impression lithographique et permettant d'empêcher le piégeage d'air entre le piston (40) et l'encre lorsque ledit piston (40) est pressé contre l'encre pendant l'assemblage de la cartouche. La partie inférieure (42) du piston présente un rayon positif et une surface texturée facilitant l'écoulement d'air à partir du centre (46) du piston vers la paroi latérale (44) de la cartouche lorsque le piston (40) est pressé contre l'encre.

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