Print head assembly, screen printing system and method

摘要

A print head assembly (119) for printing a print medium (PM) onto a workpiece (W) through a printing screen (105) which includes a screen element having a pattern of printing apertures therein, the assembly comprising: first and second carriages (141) which are in use movably supported on respective ones of first and second guides (117); and first and second print head units (143, 145) which are mounted in adjacent, parallel relation to and between the carriages, wherein the print head units each comprise first and second print head actuators which are mounted on respective ones of the carriages, and a support member (151) which extends between the print head actuators, such as to be movable vertically thereby, and in use supports a printing element.

主权项

1. A print head assembly for printing a print medium onto a workpiece through a printing screen which includes a screen element having a pattern of printing apertures therein, the assembly comprising:
first and second carriages which are in use movably supported on respective ones of first and second guides; and first and second print head units which are mounted in adjacent, parallel relation to and between the carriages, wherein the print head units each comprise a print head actuator and a support member which extends between respective ones of the carriages and is movable vertically by the print head actuator; wherein the support members each have a printing element attached thereto and the printing elements together define a cavity therebetween, and the support members are disposed in spaced relation, such that print medium is introduced into the cavity from above and between the support members, whereby a volume of print medium can be introduced into the cavity which extends across the cavity and in contact with the printing elements.