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:
Apr. 20, 2010
Filed:
Jul. 22, 2008
Kia Silverbrook, Balmain, AU;
Akira Nakazawa, Balmain, AU;
Christopher Hibbard, Balmain, AU;
Paul Ian Mackey, Balmain, AU;
Norman Michael Berry, Balmain, AU;
Garry Raymond Jackson, Balmain, AU;
Kia Silverbrook, Balmain, AU;
Akira Nakazawa, Balmain, AU;
Christopher Hibbard, Balmain, AU;
Paul Ian Mackey, Balmain, AU;
Norman Michael Berry, Balmain, AU;
Garry Raymond Jackson, Balmain, AU;
Silverbrook Research Pty Ltd, Balmain, New South Wales, AU;
Abstract
An ink refill unit for a print cartridge is provided. The unit includes a housing which defines a fluid path in fluid communication with an outlet. The unit also includes an ink reservoir having an ejection port arranged in fluid communication with the fluid path inside the housing, and an ejector assembly configured to incrementally eject ink from the reservoir when the assembly is actuated by the print cartridge. The ejector assembly includes a plunger having a toothed thread which engages with a screw thread provided in an internal wall of the housing. The ejector has a drive gear so that actuation of the drive gear imparts rotation to the toothed thread so as to rotate the plunger within the screw thread of the housing to eject ink from a bellows-like reservoir.