Source: http://www.google.com/patents/US4830929?dq=7,177,838
Timestamp: 2015-08-01 04:27:09
Document Index: 799774865

Matched Legal Cases: ['arts 52', 'arts 52', 'arts 52', 'arts 52', 'arts 52', 'arts 52']

Patent US4830929 - Molded wooden products - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA molded wooden product comprised of wood fibers to which a binder containing a synthetic resin or the like has been added, characterized in that it has portions of varying thickness, preferably a deep-drawn portion and a thickened peripheral portion, the molded wooden product being of substantially...http://www.google.com/patents/US4830929?utm_source=gb-gplus-sharePatent US4830929 - Molded wooden productsAdvanced Patent SearchPublication numberUS4830929 APublication typeGrantApplication numberUS 06/938,619Publication dateMay 16, 1989Filing dateDec 5, 1986Priority dateDec 9, 1985Fee statusPaidAlso published asCA1294408C, DE3684253D1, EP0225629A2, EP0225629A3, EP0225629B1, EP0225629B2Publication number06938619, 938619, US 4830929 A, US 4830929A, US-A-4830929, US4830929 A, US4830929AInventorsSadao Ikeda, Yoshio TaguchiOriginal AssigneeToyota Jidosha Kabushiki KaishaExport CitationBiBTeX, EndNote, RefManPatent Citations (25), Referenced by (43), Classifications (19), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetMolded wooden products
The temperature and pressure under which the hot compression molding occurs is selected according to the source of the wood fibers, the resins used in the binder, the shape of the article to be formed, and the desired strength of the article. By way of example and not limitation, a temperature of between 150� C. and 220� C., a shaping pressure of 20 to 80 kg/cm2, and a shaping time of 20 seconds to 5 minutes have been used to form molded wooden products according to the present invention.
The wood fibers are formed from wood chips which are shredded and immersed in steam having a temperature between 160� C. and 180� C. The wetted wood fibers thus obtained are then dried with hot air.
Next, the raw material B1 is pressed and shaped under compression between the upper mold 51 and the lower mold 52. By way of example and not limitation, the upper and lower molds are heated to between 150� C. and 220� C. by hot plates 61. The molding surfaces of the movable lower mold parts 52b around the deep-drawn part M2, are elevated due to the force of the springs 68. The raw material B1 is thus sandwiched between the descending upper mold 51 and the lower mold parts 52b. The lower mold parts 52b are supported by the springs 68 and, thus, the pressure of the springs 68 is imparted to the raw material B1. As the upper mold 51 closes on the lower mold parts 52b, the height of the springs 68 and the parts 52b is reduced. The descent of the lower mold parts 52b is terminated when the stopper plates 66 reach the hot plate 61, as shown in FIG. 9. With the springs 68 only partially compressed, any excess wood fibers existing around the deep-drawn part of the mold flow into the deep-drawn part since the material in the deep-drawn part does not sense the force of springs 68 and is thus at a lower pressure than adjacent material.
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to moisture and methods of making the sameUS20050011605 *Aug 9, 2004Jan 20, 2005Ruggie Mark A.Composite building components, and method of making sameUS20050028921 *Jul 1, 2004Feb 10, 2005Stroup Jon ChristopherMethods and systems for the automated manufacture of composite doorsUS20100206234 *Feb 17, 2009Aug 19, 2010Michael LongSimplified powder feeding and vaporization apparatusUS20100255245 *Apr 2, 2010Oct 7, 2010Nathan Earle DeveauBuilding component of an organic or recyclable material and method for manufacturing sameWO1995024973A1 *Mar 14, 1995Sep 21, 1995Robert L BowenMethod and apparatus for coating articlesWO2002072326A1 *Mar 8, 2002Sep 19, 2002Masonite Int CorpMoulded wood composites having a nesting profileWO2003045647A1 *Nov 27, 2002Jun 5, 2003Masonite CorpMethod of manufacturing consolidated cellulosic panels with contoured surfaces and variable basis weight* Cited by examinerClassifications U.S. Classification428/542.8, 428/537.1, 428/326International ClassificationB27N3/20, B29C43/36, B29C43/38, B27N5/00, B27N3/04Cooperative ClassificationY10T428/31989, B29C43/3607, B29K2311/14, B27N5/00, B29C43/38, B27N3/20, B29L2031/3041, Y10T428/253European ClassificationB27N3/20, B27N5/00, B29C43/36BLegal EventsDateCodeEventDescriptionDec 5, 1986ASAssignmentOwner name: TOYOTA JIDOSHA KABUSHIKI KAISHA, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:IKEDA, SADAO;TAGUCHI, YOSHIO;REEL/FRAME:004652/0542Effective date: 19861201Nov 2, 1992FPAYFee paymentYear of fee payment: 4Sep 30, 1996FPAYFee paymentYear of fee payment: 8Oct 27, 2000FPAYFee paymentYear of fee payment: 12RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services