Source: http://www.google.com/patents/US7480993?dq=7751826
Timestamp: 2016-05-03 17:04:28
Document Index: 256913571

Matched Legal Cases: ['art 2', 'art 3', 'art 2', 'art 3', 'Application No. 10', 'art 2', 'art 3', 'art 3', 'art 3']

Patent US7480993 - Method of manufacturing a nozzle plate - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA nozzle plate of the invention has nozzle opening including a taper part 2 for guiding ink in a pressure generation chamber and a straight pore part 3 formed contiguous with the taper part....http://www.google.com/patents/US7480993?utm_source=gb-gplus-sharePatent US7480993 - Method of manufacturing a nozzle plateAdvanced Patent SearchPublication numberUS7480993 B2Publication typeGrantApplication numberUS 11/374,143Publication dateJan 27, 2009Filing dateMar 14, 2006Priority dateDec 20, 2001Fee statusPaidAlso published asCN1292904C, CN1525915A, US20040113979, US20060191138, WO2003053699A1Publication number11374143, 374143, US 7480993 B2, US 7480993B2, US-B2-7480993, US7480993 B2, US7480993B2InventorsNagamitsu Takashima, Makoto Fujita, Tsuyoshi Kitahara, Takahiro KatakuraOriginal AssigneeSeiko Epson CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (17), Referenced by (1), Classifications (14), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetMethod of manufacturing a nozzle plate
US 7480993 B2Abstract
A nozzle plate of the invention has nozzle opening including a taper part 2 for guiding ink in a pressure generation chamber and a straight pore part 3 formed contiguous with the taper part.
U.S. RELATED APPLICATION DATA
This is a divisional of Application No. 10/471,339 filed Sep. 10, 2003 now abandoned, which is a National Stage entry of PCT/JP02/13208 filed on Dec. 18, 2002, which claims priority from JP 2001-387013 filed on Dec. 20, 2001. The entire disclosures of the prior applications are hereby incorporated by reference.
This invention relates to a nozzle plate used with a liquid droplet ejecting head such as an ink jet record head for ejecting ink pressurized in pressure generation chambers to a record medium of a target as droplets such as ink droplets suited for print, for example, and more particularly to the structure of a nozzle opening, a method of manufacturing the nozzle opening and a punch suited for forming the nozzle opening.
A liquid droplet ejecting head used with a liquid droplet ejecting apparatus, for example, an ink jet record head in a print field has nozzle openings communicating with pressure generation chambers. The pressure generation chamber receives energy of piezoelectric vibrators or heating elements and pressurizing liquid for recording so that the liquid for recording is ejected as droplets. Each nozzle opening has a taper part for efficiently converting ink pressurized in the pressure generation chamber into a liquid flow and a straight part for ejecting an ink droplet in a predetermined direction. Particularly, the nozzle opening affecting the droplet ejection performance needs to not Particularly, the nozzle opening affecting the droplet ejection performances needs to not only have an extremely minute opening diameter of several ten μm, but also be uniform in the same nozzle plate to ensure the droplet amount and ejection speed.
According to the invention, there is provided a nozzle plate for a liquid droplet ejecting head which includes nozzle openings each including a taper part for guiding liquid in a pressure generation chamber and a pore part being formed contiguous with the taper part, wherein the pore part is formed in a straight shape.
FIG. 1 is a drawing to show one embodiment of a nozzle plate of a liquid droplet ejecting apparatus of the invention with the proximity of a nozzle opening shown on an enlarged scale.
FIG. 1 shows one embodiment of a nozzle plate of the invention. Each nozzle opening of a nozzle plate 1 includes a taper part 2 for guiding liquid pressurized in a pressure generation chamber and a pore part 3 for controlling the ejection amount and the ejection direction of a liquid droplet. Since the pore part 3 is formed as a through hole including a wall 3 a perpendicular to the surface of the nozzle plate, diameter φ of an ejection port of the nozzle opening becomes constant regardless of the thickness roughly as much as depth D of the pore part 3 at the maximum.
As described above, in the nozzle plate of the present invention, the tip diameters of the nozzle openings become constant regardless of the grinding amount of the nozzle plate, and therefore the droplet ejection speed can be made constant as much as possible and a droplet can be deposited on a predetermined position of a target with high accuracy.
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