Source: http://www.google.com/patents/US6422689?dq=U.S.+Patent+No.+4,528,643
Timestamp: 2016-06-26 00:24:38
Document Index: 716796017

Matched Legal Cases: ['arts 101', 'arts 101', 'arts 101', 'arts 101', 'arts 101', 'arts 111']

Patent US6422689 - Inkjet print head - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsThere is provided an inkjet print head including: a substrate; a nozzle plate which forms a space where ink is to be filled between the substrate and the nozzle plate and on which plural orifices for ejecting ink are formed; and heaters which form bubbles to push ink droplets out through the orifices,...http://www.google.com/patents/US6422689?utm_source=gb-gplus-sharePatent US6422689 - Inkjet print headAdvanced Patent SearchPublication numberUS6422689 B1Publication typeGrantApplication numberUS 09/736,277Publication dateJul 23, 2002Filing dateDec 15, 2000Priority dateJul 20, 2000Fee statusLapsedAlso published asUS20020021336Publication number09736277, 736277, US 6422689 B1, US 6422689B1, US-B1-6422689, US6422689 B1, US6422689B1InventorsJae-ho Moon, Dae-soon LimOriginal AssigneeSamsung Electronics Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (2), Referenced by (31), Classifications (23), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetInkjet print head
This application makes reference to, incorporates the same herein, and claims all benefits accruing under 35 U.S.C. �119 from my application entitled INK JET PRINTING HEAD filed with the Korean Industrial Property Office on Jul. 20, 2000 and there duly assigned Serial No. 2000/41744.
Referring to FIGS. 3 through 6, an adhesive layer 120 is interposed between a substrate 100 and a nozzle plate 110, thus adhering the nozzle plate 110 to the substrate 100. The adhesive layer 120 may be an adhesive tape. The space between the substrate 100 and the nozzle plate 110 surrounded by the adhesive layer 120 becomes a filling space in which ink droplets supplied through a long fluid inlet hole 150 are filled. Several orifices 111 for ejecting ink droplets are formed on the nozzle plate 110, and heaters 130 for emitting heat connected to electrodes 140 are installed on the substrate 100 within the orifices 111. Here, the main feature of the print head according to the present invention is that the elevation parts 101 on which the heaters are installed are elevated from the substrate 100 and the heads thereof are inserted into the orifices. That is, according to the structure of the present invention, generation of the bubbles and expansion by heat emission by the heaters 130 are performed in the orifices 111. Also, the elevation parts 101 on which the heaters 130 are installed have a square sectional shape, and the orifices 111 have a round conic shape. Therefore, though the elevation parts 101 are inserted and placed in the orifices 111, sufficient gaps (d) for bringing ink into the orifices 111 is ensured. The elevation parts of a square sectional shape can be formed by, for example, anisotropic etching, and accordingly, the elevation shape of a square pyramid having a slope angle of 54.7� is obtained. The sectional shape need not be square if the gaps for bring in ink can be ensured when the elevation parts are inserted into the round orifices 111. However, a polygonal shape is preferred over a round shape. Selectively, the orifices 111 are formed in the polygonal sectional shape, and the sectional shapes of the elevation parts 101 can be formed in the round sectional shape or polygonal sectional shape. The thickness of the nozzle plate 110 is about 40-50 μm, and the height of the elevation parts 101 elevated from the substrate 100 is about 30 μm. The elevation parts 111 can be formed by one of the processes of plating, sputtering, and evaporating in addition to the anisotropic etching process.
In the above structure, ink supplied through the long fluid inlet hole 150 is filled in the space between the substrate 100 and the nozzle plate 110 and in the orifices 111, as shown in FIG. 8A. Here, the orifices 111 are directed downward, but ink does not spill out of the orifices 111 because of the surface tension. If electric current is supplied to the heaters 130 through the electrodes 140 in this situation, the heaters emit heat of 400� C. in an instant, and generates bubbles (B), as shown in FIG. 8B. The bubbles (B) increase the pressure caused by volume expansion and pushes the ink droplets (I) out of the orifices 111. After this, when all the ink droplets are completely ejected by the expansion of the bubbles (B), as shown in FIG. 8C, ink is filled again in the empty space, as shown in FIG. 8D.
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LtdThermal inkjet printhead intergrated circuit with low resistive loss electrode connectionUS20100277558 *Jul 9, 2010Nov 4, 2010Silverbrook Research Pty LtdInkjet printhead with bubble trap and air vents* Cited by examinerClassifications U.S. Classification347/65International ClassificationB41J2/16, B41J2/14, B41J2/015Cooperative ClassificationB41J2/1623, B41J2/1643, B41J2/14129, B41J2/1646, B41J2/1626, B41J2202/04, B41J2/1603, B41J2/1642, B41J2/1412, B41J2/14088European ClassificationB41J2/14B5R1, B41J2/14B5R2, B41J2/16M3, B41J2/16M8P, B41J2/16M1, B41J2/14B5, B41J2/16M8C, B41J2/16B2, B41J2/16M8TLegal EventsDateCodeEventDescriptionFeb 14, 2001ASAssignmentOwner name: SAMSUNG ELECTRONICS CO., LTD., KOREA, REPUBLIC OFFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MOON, JAE-HO;LIM, DAE-SOON;REEL/FRAME:011526/0762Effective date: 20010208Dec 30, 2005FPAYFee paymentYear of fee payment: 4Dec 23, 2009FPAYFee paymentYear of fee payment: 8Feb 28, 2014REMIMaintenance fee reminder mailedJul 23, 2014LAPSLapse for failure to pay maintenance feesSep 9, 2014FPExpired due to failure to pay maintenance feeEffective date: 20140723RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services