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)

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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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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
Formato, Richard M Grafton, MA 26 359
Harvey, Andrew C Waltham, MA 62 1143
Jens, Stephen C Winchester, MA 31 505
Pollard, Samuel W Durham, NH 8 145
Provost, George A Litchfield, NH 83 2155
Stumpf, James Goffstown, NH 2 22

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