Printhead having plural fluid ejection heating elements
View Patent ↗A printhead is provided which has a plurality of fluid chambers defined in a substrate, a plurality of covers which each cover a respective fluid chamber, each cover having a plurality of radially extending supports supporting a rim thereby defining a fluid ejection nozzle, and a plurality of heating elements positioned in each cover between respective pairs of adjacent supports, actuation of the heating elements causing ejection of fluid in the chambers through the nozzle.
1. A printhead comprising:
a plurality of fluid chambers defined in a substrate;
a plurality of covers which each cover a respective fluid chamber, each cover having a plurality of radially extending supports supporting a rim thereby defining a fluid ejection nozzle; and
a plurality of heating elements positioned in each cover between respective pairs of adjacent supports, actuation of the heating elements causing ejection of fluid in the chambers through the nozzle.
2. A printhead as claimed in claim 1 , wherein the heating elements are serpentine.
3. A printhead as claimed in claim 2 , wherein the heating elements are serially connected together.
4. A printhead as claimed in claim 1 , wherein each heating element has a petal formation extending toward the rim.