Patent ID: 11872819
Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B  G | IPC B

Claim 0:
1. A printing fluid dispersing method for a printing system, the method comprising:
pumping printing fluid from a supply through a nozzle within the printing system by a pump, wherein the pump is a positive pressure pump, the printing fluid having some solid content, wherein, the nozzle comprises a nozzle inlet and nozzle outlet, the nozzle outlet including a member comprising a plurality of holes, wherein pumping the printing fluid through the member causes a dispersed printing fluid to be obtained downstream the nozzle outlet;
determining a clogging state of the nozzle wherein determining the clogging state of the nozzle includes determining a stroke period of the pump is greater than a threshold amount with respect to a reference stroke period;
upon determining a partially clogged state based on the stroke period being greater than the threshold amount, performing an unclogging operation, wherein the unclogging operation comprises injecting a burst of air upstream the nozzle between stroke periods of the pump, the burst not interfering with operation of the pump; and
transferring obtained dispersed printing fluid to an element of the printing system.