Velcro Industries B.v.

Peter E Grulke

George A Provost

Stephen C Jens

Clinton Dowd

Samuel White Pollard

Mark J Condon

James Van Stumpf

Thomas G Lacey

Scott M Filion

Evangelos Kaparis

Methods of forming mold cavities suitable for hook and loop fastening are disclosed, along with effective hook construction and hook and loop fastener products that have an ultrathin cross-section. Photochemical techniques are employed to form plates that define hook-form mold cavities, and, alternatively, chemical etching is employed following preforming of the cavities and machining. Hooks having three-dimensional tapers with enhanced loop engaging characteristics are disclosed. By utilization of special surface finishes and tolerances, hook fasteners, having ultrathin cross-sections are realized, that pave the way for practical use of touch fasteners in a wide range of new areas.

Molding of fastening hooks and other devices

A method of manufacturing plates assembleable in a stack to provide a mold to form fastener elements includes applying a photoresist material to at least one side of the plate. The photoresist material is exposed to light. Portions of the photoresist material are removed based on the light exposure. Acid is applied to the plate, dissolving portions of the plate exposed to the acid and creating cavities.

Molding methods, molds and products

Growing community of inventors

Fremont, NH, United States of America

Peter E Grulke