Source: http://www.google.com/patents/US4439929?dq=5,960,411
Timestamp: 2014-08-22 14:52:52
Document Index: 631401970

Matched Legal Cases: ['arts 2', 'art 3', 'arts 2', 'art 2', 'art 2', 'art 3', 'art 2', 'art 2', 'arts 2', 'art 3']

Patent US4439929 - Apparatus for drying a ceramic green honeycomb body - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsThe disclosed apparatus is for drying a ceramic green honeycomb body by dielectric heating, which apparatus comprises a support board disposed between two electrodes for the dielectric heating, the support board having a tray-like metallic first part to support the ceramic green honeycomb body and a...http://www.google.com/patents/US4439929?utm_source=gb-gplus-sharePatent US4439929 - Apparatus for drying a ceramic green honeycomb bodyAdvanced Patent SearchPublication numberUS4439929 APublication typeGrantApplication numberUS 06/349,476Publication dateApr 3, 1984Filing dateFeb 17, 1982Priority dateFeb 23, 1981Fee statusPaidPublication number06349476, 349476, US 4439929 A, US 4439929A, US-A-4439929, US4439929 A, US4439929AInventorsJiro Kitagawa, Isao MizutaniOriginal AssigneeNgk Insulators, Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (5), Referenced by (21), Classifications (9), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetApparatus for drying a ceramic green honeycomb bodyUS 4439929 AAbstract The disclosed apparatus is for drying a ceramic green honeycomb body by dielectric heating, which apparatus comprises a support board disposed between two electrodes for the dielectric heating, the support board having a tray-like metallic first part to support the ceramic green honeycomb body and a plate-like non-metallic second part to hold the first part.
What is claimed is: 1. An apparatus for drying a ceramic green honeycomb body, comprising two electrodes facing toward each other with a spacing therebetween, one of the electrodes is grounded; a dielectric heating energy source is connected to the electrodes; and a support board is provided adjacent to the grounded electrode, between the two electrodes facing each other, the support board comprises a tray-like metallic first part designed to support the ceramic green honeycomb body and a plate-like non-metallic second part designed to hold the metallic first part, the tray-like metallic first part covering only a portion of the plate-like non-metallic second part, with the surface of the metallic first part being larger than that section of the ceramic green honeycomb body which is in contact with the metallic first part, the tray-like metallic first part is arranged so that it is isolated from any other tray-like metallic first parts by free areas on the support board so that during a drying operation a higher density of electric lines of force pass through the plate-like metallic first part than through the free areas.
SUMMARY OF THE INVENTION Therefore, an object of the present invention is to obviate the above-mentioned shortcomings of the prior art.
DESCRIPTION OF THE PREFERRED EMBODIMENTS One feature of the present invention is in a support board for supporting one or more ceramic green honeycomb bodies during the drying. Referring to FIG. 1 and FIG. 2, a support board 1 has one or more tray-like metallic first parts 2 such as perforated metallic trays and a plate-like non-metallic second part 3 such as a non-metallic plate. Each of the tray-like metallic first parts 2 has a supporting surface which is larger than that section of the ceramic green honeycomb body 5 which is in contact with the tray-like metallic first part 2, and a plurality of perforations are bored through the tray-like metallic first part 2. The plate-like non-metallic second part 3 has one or more holes 4 for holding one tray-like metallic first part 2 in each hole 4, and the hole 4 is larger than the above-mentioned section of the green honeycomb body 5 being supported by the tray-like metallic first part 2. The tray-like metallic first parts 2 are separated from each other by free areas on the plate-like non-metallic second part 3.
EXAMPLE Extruded ceramic green honeycomb bodies 5 were prepared by using cordierite ceramic material. Such ceramic green honeycomb body 5 had an outside diameter D of 118 mm, a height H of 200 mm, and a porosity of 60%. Separately, support boards 1 of different constructions were prepared as shown in Table 1. All the ceramic green honeycomb bodies 5 were dried by heating for a certain period of time in a dielectric drier unit 6 with a rated output of 60 kW, and some of the ceramic green honeycomb bodies 5 were further heated in a forced-wind drier unit 7 under the conditions of an air temperature of 120� C. and a wind velocity of 1 m/sec.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS2737569 *Aug 2, 1951Mar 6, 1956Skenandoa Rayon CorpElectrode structure for high frequency drierUS3848038 *Jun 4, 1973Nov 12, 1974Raytheon CoDrying expanded plastic with microwave energyUS3899326 *Mar 30, 1973Aug 12, 1975Corning Glass WorksMethod of making monolithic honeycombed structuresDE2817067A1 *Apr 19, 1978Oct 25, 1979Siemens AgKapazitiver hochfrequenzofen zum trocknen von gefalteten faserkabeln, insbesondere chemiefaserkabelnFR1033104A * Title not available* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS4757617 *Mar 12, 1986Jul 19, 1988Ngk Insulators, Ltd.Method of drying formed ceramic mass and jig used in the methodUS4808065 *Feb 26, 1988Feb 28, 1989Ngk Insulators, Ltd.Apparatus for changing posture of green extruded bodyUS4837943 *Dec 22, 1987Jun 13, 1989Ngk Insulators, Ltd.Dielectric drying process for honeycomb structuresUS4866857 *May 28, 1987Sep 19, 1989U.S. Philips CorporationMethod of and arrangement for drying ceramic green bodiesUS5223188 *May 8, 1992Jun 29, 1993Corning IncorporatedStiffening of extrudates with RF energyUS5263263 *Feb 26, 1993Nov 23, 1993Corning IncorporatedRotary dielectric drying of ceramic honeycomb wareUS5265346 *Mar 26, 1992Nov 30, 1993Ngk Insulators, Ltd.Drying carrier adapted for carrying honeycomb structureUS5388345 *Nov 4, 1993Feb 14, 1995Corning IncorporatedDielectric drying of metal structuresUS5671543 *Jun 7, 1995Sep 30, 1997Sears; Todd A.Tape measure marking device and method for use thereofUS5733352 *Aug 13, 1996Mar 31, 1998Denki Kagaku Kogyo Kabushiki KaishaDiesel particulate filter; controlled surface roughnessUS5946817 *Mar 26, 1998Sep 7, 1999Ngk Insulators, Ltd.Method of, and apparatus for drying shaped ceramic bodiesUS6725567 *Feb 1, 2002Apr 27, 2004Ngk Insulators, Ltd.Method of drying honeycomb structural bodiesUS7320183 *Sep 2, 2004Jan 22, 2008Ngk Insulators, Ltd.Method for drying honeycomb formed structureUS20090294440 *May 28, 2009Dec 3, 2009Paul Andreas AdrianSystem And Method For Drying Of Ceramic GreenwareUS20100043248 *Aug 20, 2008Feb 25, 2010Cervoni Ronald AMethods for drying ceramic greenware using an electrode concentratorEP0273707A2 *Dec 23, 1987Jul 6, 1988Ngk Insulators, Ltd.Dielectric drying process for honeycomb structuresEP0506392A1 *Mar 26, 1992Sep 30, 1992Ngk Insulators, Ltd.Drying carriers for honeycomb structuresEP0618416A1 *Dec 15, 1993Oct 5, 1994Corning IncorporatedRotary dielectric drying of ceramic honeycomb wareEP0761279A2 *Aug 12, 1996Mar 12, 1997Denki Kagaku Kogyo Kabushiki KaishaHoneycomb structure, process for its production, its use and heating apparatusWO1988000678A1 *Jul 8, 1987Jan 28, 1988Max WagnerProcess and device for drying ceramic hollow bodiesWO2011163338A1 *Jun 22, 2011Dec 29, 2011Dow Global Technologies LlcDrying method for ceramic green ware* Cited by examinerClassifications U.S. Classification34/254, 34/68International ClassificationF26B3/34, F26B25/18, C04B33/30Cooperative ClassificationF26B3/343, C04B33/30European ClassificationF26B3/34B, C04B33/30Legal EventsDateCodeEventDescriptionSep 26, 1995FPAYFee paymentYear of fee payment: 12Nov 5, 1991REMIMaintenance fee reminder mailedOct 3, 1991FPAYFee paymentYear of fee payment: 8Oct 2, 1987FPAYFee paymentYear of fee payment: 4Feb 17, 1982ASAssignmentOwner name: NGK INSULATORS, LTD., 2-56, SUDA-CHO, MIZUHO-KU, NFree format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:KITAGAWA, JIRO;MIZUTANI, ISAO;REEL/FRAME:003978/0555Effective date: 19820210RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google