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. 08, 2008
Filed:
Sep. 06, 2002
David Mark Blakey, Herts, GB;
David Mark Blakey, Herts, GB;
The Technology Partnership, Melbourn Royston, Hertz, GB;
Abstract
A method of forming a perforate membrane () is disclosed for use in a liquid transport device. The membrane has at least plural nozzles () formed therethrough. Each of those nozzles has a throat portion () opening at opposite end through opposite surface (') of the perforate membrane and a smoothly curved outwardly diverging portion () extending from the first end of the throat portion to the first surface () of the perforate membrane. Laser energy is applied selectively to the first surface () of the membrane in the form of a pulsed, focused beam to form the nozzles () and thereafter the first surface () of the membrane and the surface of the diverging portion () of the nozzles () are electro-polished to remove surface imperfections. The electro-polishing is controlled so as to remove material from the surface of the diverging portion () of the nozzles to a depth less than the length of the throat portion ().