Minnesota Mining and Manufacturing Company

Harlan L Krinke

Timothy L Hoopman

Dee Lynn Johnson

Olester Benson, Jr

Clyde D Calhoun

James G Berg

Cheryl M Frey

Paul E Marecki

Jeanine M Shusta

David R Gagnon

Jennifer Mary Aamodt

Matthew R Atkinson

Corazon C Brizuela

Methods of providing diffusing risers on a fresnel lens die having a plurality of optical facets, wherein adjacent optical facets are separated by a riser, the method including the steps of depositing a difflusing layer on the plurality of optical facets and the risers, and selectively removing the diffusing layer from the plurality of optical facets, wherein the diffusing layer remains substantially intact on the risers. The diffusing layer can be deposited in an electrolyte bath substantially free of grain refiners.

Method of providing diffuse risers on a fresnel lens die

A mold 79 that includes an array of cube-corner elements 80 that are arranged in the array such that a retroreflective cube-corner sheeting 60 that is formed thereon is capable of glittering when light is incident on the sheeting. The array may be defined by three sets of intersecting grooves 25, 26, 27 where each groove set includes two or more generally parallel grooves. At least one groove in at least one of the sets has faces 22 of adjacent cube-corner elements 30a, 30b arranged such that a dihedral angle .alpha. located between adjacent faces varies along the groove(s) in the set.

Mold for producing glittering cube-corner retroreflective sheeting

A fastener and a method of fastening articles employing the fastener are provided. The fastener includes a fastener element adapted to be mated in an interlocking arrangement to a complementary fastener element. The fastener element has a plurality of mating cavities. The mating cavities include a mating surface which is adapted to interlockingly engage a mating element projecting from the complementary fastener element.

Dual structured fastener elements

Articles having a complex geometric configuration have hydrophilicity imparted to at least a portion of surfaces of the articles while substantially retaining the complex geometric configuration. The hydrophilicity is imparted by an extremely thin, self-interlocking shell of tactic, hydrophilic poly(vinyl alcohol) enveloping the surfaces. A tactic poly(vinyl alcohol) precursor applied to surfaces of the supporting structure is reacted in situ on the surfaces with a hydrolysis reagent to prepare the tactic, hydrophilic poly(vinyl alcohol) shell. The article having the hydrophilic shell is highly resistant to solvent washout. Hydrophilicity and hydrophobicity can be reversibly provided on regio-specific surfaces of the article. Articles in the form of membranes useful as residue barriers for electroplating devices, and separators for electrochemical cells are also described.

Hydrophilic membranes for electrochemical devices and method for

A method of making a unitary channeled heat exchanger wherein the unitary heat exchanger is to be connected with a first fluid circulation system. The unitary heat exchanger preferably includes a first manifold connectible to the first fluid circulation system and a heat transfer body fluidically connected to the manifold. The unitary heat exchanger is fabricated by forming a sacrificial core with a first manifold forming portion and a body forming portion having surfaces shaped generally similar to the desired shapes of the first manifold and body of the unitary heat exchanger, depositing heat exchanger forming material about the sacrificial core to form a shell about the sacrificial core, the shell preferably including a manifold and a body integrally formed, providing an access opening through the shell of the unitary heat exchanger, and removing the sacrificial core from within the shell of the unitary heat exchanger through the access opening, thereby leaving passages within the manifold and the body of the unitary heat exchanger that are in fluidic communication with one another. The body forming portion of the sacrificial is further preferably made with one or more holes so that upon deposition of heat exchanger forming material, posts are formed connecting upper and lower plates of the shell of the heat exchanger for increased structural integrity. Additionally, the deposition can be advantageously controlled so that apertures remain after the post or posts are formed, which may be used for mounting components or as part of a second fluid circulation circuit.

Method of making microchanneled heat exchangers utilizing sacrificial

A method for producing an article having a body with one or more enclosed channels extending therethrough such as for the circulation of fluids. The body is formed preferably by metal deposition about one or more fibers to generate the enclosed channels with at least one end of the fibers extending beyond the body. The fibers are then extracted from the channels in the body to leave open the channels through which fluid may be circulated.

Method for producing a sheet member containing at least one enclosed

A sheet member and a method for constructing the sheet member. The sheet member includes a plurality of elongated, enclosed channels formed by electrodeposition.

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May Township, MN, United States of America

Harlan L Krinke