US 11,865,848 B2
Print material feed system
Robert Dennis Taff, San Ramon, CA (US); Alexander Sou-Kang Ko, Santa Clara, CA (US); Stephen Mark Smith, Morgan Hill, CA (US); and Geoffrey Kenneth Love, Lafayette, CA (US)
Assigned to Kateeva, Inc., Newark, CA (US)
Filed by Kateeva, Inc., Newark, CA (US)
Filed on Apr. 19, 2022, as Appl. No. 17/659,679.
Application 17/659,679 is a continuation of application No. 16/717,756, filed on Dec. 17, 2019, granted, now 11,338,588.
Claims priority of provisional application 62/782,412, filed on Dec. 20, 2018.
Prior Publication US 2022/0242137 A1, Aug. 4, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B41J 2/18 (2006.01); B41J 2/175 (2006.01)
CPC B41J 2/18 (2013.01) [B41J 2/17596 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An inkjet printing device, comprising:
a print assembly; and
a print material feed system coupled to the print assembly, the print material feed system comprising:
a first circulation circuit and a second circulation circuit, the first circulation circuit fluidly coupled between the second circulation circuit and the print assembly, the first circulation circuit comprising a supply reservoir, a drain reservoir, and a negative pressure gas flow unit coupled to the supply reservoir and the drain reservoir to control pressure in the supply reservoir and the drain reservoir, and further comprising a third circulation circuit fluidly coupled to the second circulation circuit and comprising a mixing element.