| 摘要 |
A ball check valve for use in a bulk ink supply system of an inkjet printing system, for disposal in an ink flow path between an ink reservoir (20) and a printhead (40), so as to control back pressure at the printhead (40) thereby reducing the occurrence of de-priming of the printhead (40), including, a valve body (15) defining a chamber (18) with an inlet (16) and an outlet (17); a ball (50) disposed in the chamber (18), the ball (50) having a diameter; and a ball retainer (60) disposed in the inlet (16), the ball retainer (60) having an aperture (62) with a diameter which is less than the diameter of the ball (50), wherein backflow of ink in the chamber (18) causes the ball (50) to seat against the ball retainer (60), placing the ball check valve in a dosed position such that ink flow through the aperture (62) is restricted. <IMAGE> |
