Molding of fasteners and other features

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6533981
SERIAL NO

09341908

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Molding apparatus and method for molding of features integral with a base, such as in the production of fastener elements for hook-and-loop type touch fasteners, e.g. by the Fischer process, employs a mold roll (1) formed of rings (9) that have coolant passages (22) formed within the ring components (9) themselves for substantially direct contact with cooling liquid. Axial tie rods (16) compress the mold rings (9) together, contributing to the sealing of the coolant passages and the stiffness of the mold roll. Mold cavities (2), including cavities (2) used for injection molding, and cooling passages (22) formed in either mold rings (9) or injection mold plates by photo-chemical etching, laser machining and other techniques are disclosed. Various machines and methods taking unique advantage of these features are disclosed, including ring alignment methods for improved base thickness control and for forming products with very thin bases.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
VELCRO INDUSTRIES B.V.CURACAO23

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Formato, Richard M Grafton, MA 22 336
Harvey, Andrew C Waltham, MA 62 1083
Jens, Stephen C Winchester, MA 31 485
Pollard, Samuel W Durham, NH 8 136
Provost, George A Litchfield, NH 83 1930
Stumpf, James Goffstown, NH 2 22

Cited Art Landscape

Patent Info (Count) # Cites Year
 
YKK CORPORATION (2)
5131119 Hook structure for integrally molded surface fastener 57 1991
5361462 Molded surface fastener 19 1993
 
Minnesota Mining and Manufacturing Company (1)
4894060 Disposable diaper with improved hook fastener portion 505 1988
 
VELCRO BVBA (1)
* 6039556 Stackable mold plates having arrays of laser-cut mold surfaces at their edges 21 1997
 
Masuda Seisakusho Co., Ltd. (1)
* 5038469 Method of making a porous roll assembly 9 1990
 
John H. Blanz Company, Inc. (1)
4725221 Improved machine for continuously producing an element of a separable fastener 37 1986
 
GARRETT CORPORATION, THE (1)
4587700 Method for manufacturing a dual alloy cooled turbine wheel 46 1984
 
The Procter & Gamble Company (1)
5326612 Nonwoven female component for refastenable fastening device and method of making the same 175 1991
 
VELCRO INDUSTRIES B.V. (6)
4775310 Apparatus for making a separable fastener 144 1986
4794028 Method for continuously producing a multi-hook fastner member and product of the method 185 1986
4872243 Multi-hook fastener member 118 1988
4984339 Hook for hook and loop fasteners 135 1988
5339499 Hook design for a hook and loop fastener 65 1993
* 5971738 Continuous molding of fasteners and other features 15 1997
 
FIRST NATIONAL BANK OF CHICAGO, THE (1)
4573893 Extrusion die with external and internal cooling means 13 1984
 
CANON KABUSHIKI KAISHA (2)
5174937 Method for molding of substrate for information recording medium and method for preparing substrate for information recording medium 13 1990
5705254 Plastic molded article with a finished surface appearance 22 1996
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
APLIX (2)
8522407 Insertion block for the formation of a hook field on an injection-moulded object, and a moulded object comprising a hook field of this type 1 2008
9526303 Molded catching elements and method for manufacturing same 0 2013
 
VELCRO BVBA (4)
7217119 Fastener molding 3 2005
* 2006/0263,463 Fastener molding 1 2005
7641469 Fastener molding 0 2007
7806677 Molding apparatus and related systems and methods 0 2007
 
3M INNOVATIVE PROPERTIES COMPANY (1)
9289925 Methods of making hollow microneedle arrays and articles and uses therefrom 0 2010
 
AEROVIRONMENT, INC. (1)
* 8201316 Lamination cooling system formation method 0 2009
 
VELCRO INDUSTRIES B.V. (2)
* 2003/0127,769 Fastener members and apparatus for their fabrication 3 2003
* 2005/0244,756 Etch rate control 1 2004
* Cited By Examiner