Donnelly Corporation

Jon K Nisper

Barry W Hutzel

David B Fry

Adam M Deck

Hassel J Savard

Gina Kritchevsky

Robert Arterburn

A method of molding a plastic element having a microstructure embedded therein includes the steps of providing a master having a microstructure therein; casting a liquid surface coating over said master; solidifying the liquid surface coating to form a rigid molding tool containing said microstructure; placing the molding tool into a molding machine; introducing a plastic element into the molding machine; transferring the microstructure from the molding tool to the plastic element; and removing the molded plastic element from the molding machine. The molding tool may also be produced by machining directly into a molding base element a predetermined microstructure without machining through a transfer interlayer. An injection-molded binary optical element produced according to the method of the present invention provides an injection molded optical element which diffracts light.

Method for reproducing holograms, kinoforms, diffractive optical

A utility emergency light assembly for vehicles, machinery, or the like detachably mounted by a slide coupling to a mounting bracket attached to the vehicle or machine. The light assembly has a compact, space-saving profile and includes a housing having a lamp assembly mounted within a spool journaled in the housing for reeling and unreeling a power cord, enabling movement of the assembly to areas of the vehicle where light is needed. A cap substantially closes the housing and includes a lens located over the lamp assembly. The lamp assembly is sealed within the spool, while the remainder of the housing is open to allow water drainage and to prevent the accumulation of moisture and debris.

Vehicle utility/emergency light assembly

Growing community of inventors

Holland, MI, United States of America

Jon K Nisper