Forming fastener mold cavities by electro-discharge machining

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5922222
SERIAL NO

08935611

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Abstract

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An apparatus and electro-discharge machining method for making fastener-shaped mold surfaces in mold plates for making a mold for molding a fastener product having an array of fastener elements. An electro-discharge is created between an electrode and a stack of sheet-form blanks of plate material such that material is removed from the blanks to produce mold plates, each mold plate having a series of fastener element-shaped mold surfaces extending inwardly from an outer edge of the plate. Extremely small tip radii (e.g., less than 0.001 inch) can be produced with the invention. Since a multitude of finished mold plates can be formed at once, the invention is extremely cost effective in producing mold plates with accurately-formed mold surfaces.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
VELCRO INDUSTRIES B.V.CURACAO23

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Harvey, Andrew C Waltham, MA 62 1083
Jens, Stephen C Winchester, MA 31 485

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
 
Other [Check patent profile for assignment information] (1)
* 4860616 Method and apparatus for the manufacture of rotary sheet dies 19 1988
 
Volzhskoe Obiedinenie Po Proizvodstvu Legkovykh Avtomobilei (1)
* 4751860 Method of making blanking die sets 2 1986
 
FREESCALE SEMICONDUCTOR, INC. (1)
* 5637264 Method of fabricating an optical waveguide 8 1995
 
John H. Blanz Company, Inc. (1)
* 4725221 Improved machine for continuously producing an element of a separable fastener 37 1986
 
BRIDGESTONE CORPORATION (1)
* 5461211 Groove forming method by discharge machining 5 1994
 
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. (5)
* 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
 
UNITED TECHNOLOGIES CORPORATION (1)
* 5637239 Curved electrode and method for electrical discharge machining curved cooling holes 22 1995
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (1)
* 7605339 Methods of forming an annular undercut 0 2006
 
HAYES LEMMERZ INTERNATIONAL, INC. (1)
6296549 Apparatus and method of machining brake components 3 2000
 
Velera Industries (1)
7192266 Molding device inserts 2 2004
 
VELCRO BVBA (8)
* 6258311 Forming mold cavities 36 1999
6543099 Varying the loop engageability of fastener element arrays 23 2000
6387305 Forming mold cavities 12 2000
6671935 Varying the loop engageability of fastener element arrays 12 2002
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 (2)
8030591 Microreplication on a complex surface 0 2006
9289925 Methods of making hollow microneedle arrays and articles and uses therefrom 0 2010
 
BREMBO S.P.A. (2)
6261153 Apparatus and method of machining brake components 2 1998
6505716 Damped disc brake rotor 35 2000
 
GKN AEROSPACE SWEDEN AB (2)
* 6797912 Method and a device for manufacturing a stator component or rotor component 8 2003
* 2004/0112,871 METHOD AND A DEVICE FOR MANUFACTURING A STATOR COMPONENT OR ROTOR COMPONENT 0 2003
 
BRIGGS & STRATTON CORPORATION (1)
* 6064027 Method of making a composite gear 5 1998
 
VELCRO INDUSTRIES B.V. (3)
* 6224807 Methods of molding fasteners and of forming fastener molds 18 1999
* 2005/0244,756 Etch rate control 1 2004
* 2007/0029,695 Methods of producing fastener products 9 2006
* Cited By Examiner