Rotational mold with valved charge box

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4722678
SERIAL NO

07026030

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Apparatus for manufacturing thin walled hollow parts such as automobile crash pads from dry thermoplastic powder includes a louver type valve system in the open end of a powder charge box and means for joining the charge box end-to-end with an open-ended heated mold for rotation so that the charge box will be inverted above the mold at the end of an upward swing movement during which the valve is closed to prevent flow of powder to the mold. Once the charge box is fully inverted the valve is opened to evenly distribute the powder into the mold by gravity flow to prevent excessive build-up of wall thickness on the mold surfaces.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
Ex-Cell-O CorporationTROY, MI1

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Wersosky, John M Dover, NH 4 79

Cited Art Landscape

Patent Info (Count) # Cites Year
 
EX-CELL-O CORPORATION OF TROY MICHIGAN (1)
* 4562025 Mold method and apparatus for multi-color plastic shells 62 1984
 
YMOS AKTIENGESELLSCHAFT INDUSTRIEPRODUKTE (1)
* 4606868 Method for casting thin-walled work pieces of synthetic materials 16 1984
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
ENVIRONMENTAL RECYCLING TECHNOLOGIES PLC (4)
8221668 Process for forming plastic, apparatuses for forming plastic, and articles made therefrom 1 2002
* 2006/0003,044 Process for forming plastic, apparatuses for forming plastic,and articles made therefrom 31 2002
7682141 Production apparatus for forming plastic molded articles 3 2003
* 2006/0131,773 Production apparatus for forming plastic molded articles 3 2003
 
Other [Check patent profile for assignment information] (2)
* 5728423 Method and apparatus for internally and externally coating enclosed metallic structures 3 1995
* 5718929 Rotational molding apparatus having fluid cooled arms 1 1996
 
E. I. DU PONT DE NEMOURS AND COMPANY (2)
* 2009/0282,596 BALLISTIC RESISTANT BODY ARMOR ARTICLES 8 2008
* 2011/0146,862 LOW NOISE TIRE 0 2010
 
INTERTEC SYSTEMS, L.L.C. (2)
* 6887065 Polymeric multiform membrane molding 0 2002
* 2003/0227,110 Polymeric multiform membrane molding 0 2002
 
KANSEI CORPORATION (1)
* 5932162 Method and device for molding powdered slush 2 1997
 
VISTEON GLOBAL TECHNOLOGIES, INC. (2)
6409493 Double-cast slush molding method and apparatus 2 2000
6709619 Double-cast slush molding method 4 2002
 
ROGERSON TECHNOLOGY, INC. (1)
* 5358682 Method and apparatus for rotational application of polymers 7 1991
 
TEXTRON AUTOMOTIVE COMPANY INC. (1)
6632525 Material and method for manufacturing plastic parts 2 2000
 
BAYER MATERIALSCIENCE LLC (3)
* 5654102 Material for manufacturing plastic parts 5 1995
* 5525284 Process for manufacturing plastic parts 17 1995
* 5998030 Material for manufacturing plastic parts 7 1997
 
DAVIDSON TEXTRON INC. (2)
* 4894004 Apparatus for molding multi-colored plastic shells 14 1988
* 4938906 Process for molding multi-colored plastic shells 12 1989
 
BECKER GROUP EUROPE GMBH (1)
* 5462422 Apparatus for the manufacture of a plastic molded part 6 1994
 
THE DOW CHEMICAL COMPANY (1)
* 5196259 Matrix composites in which the matrix contains polybenzoxazole or polybenzothiazole 7 1990
 
TOYOTA MOTOR CORPORATION (1)
* 6981862 Slush molding machine 0 2003
 
KONAL ENGINEERING AND EQUIPMENT INC. (1)
6284182 Molding process employing heated fluid 7 1999
 
MAGNA INTERIOR SYSTEMS INC. (2)
* 6082989 Slush molding apparatus 4 1998
6461561 Slush molding process 1 2000
* Cited By Examiner