Printing fluid restrictor plate for an ink jet print head assembly and method

摘要

A restrictor plate for an ink jet print head assembly includes a substantially flat body having fluid flow passageways extending through the body. The fluid flow passageways are elongated between a fluid receiving volume end and an opposite fluid ejection volume end. The receiving volume end is fluidly coupled with a chamber and the ejection volume end is fluidly coupled with an orifice of the assembly from which the fluid is ejected. The receiving volume end receives the ink from the chamber so that the ink flows through the passageways along a printing direction. The body is shaped around the one or more fluid flow passageways to form one or more bottlenecks in the one or more fluid flow passageways that increase a fluid flow resistance of the fluid along a direction in the one or more fluid flow passageways that is opposite of the printing direction.

主权项

1. A restrictor plate for an ink jet print head assembly, the restrictor plate comprising:
a substantially flat body having opposing side walls on opposite sides of a fluid flow passageway extending through the body, the fluid flow passageway elongated along a printing flow direction that is parallel to the side walls between a fluid receiving volume end and an opposite fluid ejection volume end, the fluid receiving volume end configured to be fluidly coupled with a chamber holding a volume of ink in the ink jet print head assembly, the fluid ejection volume end configured to be fluidly coupled with an orifice of the ink jet print head assembly, wherein the fluid flows through the fluid flow passageway in the printing flow direction to be ejected through the orifice to print the fluid onto an object, wherein the body is shaped around the fluid flow passageway to form one or more bottlenecks in the fluid flow passageway that increase a fluid flow resistance of the fluid along a direction in the fluid flow passageway that is opposite of the printing flow direction and that is parallel to the side walls, and wherein the body includes a flow restriction protrusion extending into the fluid flow passageway, the flow restriction protrusion extending into the fluid flow passageway from the fluid receiving volume end of the fluid flow passageway in the direction that is opposite of the printing flow direction, the flow restriction protrusion also increasing the fluid flow resistance of the fluid along the direction that is opposite of the printing direction.