The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 07, 2014
Filed:
Feb. 08, 2010
Adrian Bisson, Balmain, AU;
Roger Michael Davey, Balmain, AU;
Alexander Grant, Balmain, AU;
Damon Donald Ridley, Balmain, AU;
Kia Silverbrook, Balmain, AU;
Steven Carter, Balmain, AU;
Adrian Bisson, Balmain, AU;
Roger Michael Davey, Balmain, AU;
Alexander Grant, Balmain, AU;
Damon Donald Ridley, Balmain, AU;
Kia Silverbrook, Balmain, AU;
Steven Carter, Balmain, AU;
Zamtec Ltd, Dublin, IE;
Abstract
A method of minimizing kogation of a heater element in a thermal inkjet printhead. The method includes the steps of: (i) supplying an inkjet ink to a nozzle chamber of the printhead; and (ii) repeatedly actuating a heater element in the nozzle chamber so as to heat a portion of the ink to a temperature sufficient to form a bubble therein, thereby causing droplets of ink to be ejected from a nozzle opening associated with the nozzle chamber. The ink includes a styrene-acrylic copolymer having a glass transition temperature (Tg) in the range of 5 to 30° C. and acid value in the range of 100 180 mgKOH/g, said styrene-acrylic copolymer minimizes kogation of the heater element.