Michael R Stevenson

US Patent:

6613830, Sep 2, 2003

Filed:

Jan 29, 1999

Appl. No.:

09/240910

Inventors:

Michael J. Stevenson - Sedona AZ 86336
Robert A. Reeves - Cottonwood AZ
Matthew P. Stevenson - Sedona AZ

Assignee:

Michael J. Stevenson - Sedona AZ

International Classification:

C08L 2306

US Classification:

524501, 524271, 524487, 524507, 524522, 524523, 524524, 4274123

Abstract:

There is disclosed an aqueous-base coating composition containing, as essential components, finely-divided, water-dispersable: colorant, polyethylene, binder and water with sufficient of a surface active agent to form a stable suspension. The coating composition is applied as a film coating onto a polyethylene surface and the binder temporarily binds the coating to the surface until the coating can be thermally treated to incorporate the coating into the polyethylene, permanently coloring the surface. The invention also comprises a method for the preparation of the aqueous-base coating composition in which the essential components are prepared as aqueous dispersions or emulsions which are blended together to form the final coating composition.

US Patent:

6702968, Mar 9, 2004

Filed:

Sep 17, 2001

Appl. No.:

09/953629

Inventors:

Michael J. Stevenson - Sedona AZ 86336
Robert Alan Reeves - Cottonwood AZ

Assignee:

Michael J. Stevenson - Sedona AZ

International Classification:

B29C 4104

US Classification:

264104, 264132, 264311, 156240

Abstract:

Electrical circuit elements such as electrically conductive strips are permanently applied to the surface of polyolefin parts, such as polyethylene parts which are manufactured by rotational molding, by use of a transfer which can be applied to the interior surface of a rotational mold at the start of the molding cycle or can be applied to the molded part after its formation. The transfer comprises a carrier sheet on which the conductive circuit elements are printed with a mixture of wax or polyethylene powders containing from 30 to about 60 weight percent of conductive particles, preferably metal flakes. After application, the carrier sheet is removed and the conductive circuit elements are permanently incorporated into the surface of the polyethylene part by heating, either during the rotational molding cycle or by post-cycle heating of the formed part.

US Patent:

6815005, Nov 9, 2004

Filed:

Aug 19, 1997

Appl. No.:

08/914536

Inventors:

Michael J. Stevenson - Sedona AZ 86336
Robert A. Reeves - Cottonwood AZ
Matthew P. Stevenson - Sedona AZ

Assignee:

Michael J. Stevenson - Sedona AZ

International Classification:

B05D 302

US Classification:

427180, 4273935

Abstract:

There is disclosed a method for permanently and decoratively enhancing a polyethylene surface of a preformed article. In this method, a decorative enhancement composition is created by blending particulate thermoplastic powder, a binder solid, and a colorant into a liquid carrier. The particulate thermoplastic powder bonds to the colorant, the binder solid promotes adhesion of the colored thermoplastic to the polyethylene surface until it can be bonded, and the liquid carrier facilitates the transfer of the colored thermoplastic to the polyethylene surface of the preformed article. The decorative enhancement composition is applied to the polyethylene surface. The deposited decorative enhancement composition and the interfacing polyethylene surface are heated sufficiently to incorporate the decorative enhancement composition into the polyethylene surface. The enhanced polyethylene surface is allowed to cure by removal of the application of heat. Upon curing, the decorative enhancement composition is permanently incorporated into the polyethylene surface enhancing the physical properties and the appearance of the preformed article.

US Patent:

6852788, Feb 8, 2005

Filed:

Dec 5, 2001

Appl. No.:

10/002590

Inventors:

Michael J. Stevenson - Sedona AZ, US
Robert Alan Reeves - Cottonwood AZ, US

International Classification:

C08K005/01

US Classification:

524474

Abstract:

A mixture of a carrier and binder component and polymer powders is provided as a molding composition for sealing rotational molds or for reinforcing selected areas of rotationally molded parts. The carrier and binder component can be very low density polyethylene, petroleum jelly, hydrocarbon wax, hydrocarbon tackifier, or mixtures thereof, and the polymer powders are thermoplastics having a low melt index. The molding composition is applied to selected areas of the rotational mold, such as to the mating flanges of the mold halves to seal the parting line of the mold, or to areas within the mold where it is desired to have reinforced regions of greater wall thickness, such as ribs or bosses.

US Patent:

7128970, Oct 31, 2006

Filed:

May 22, 2001

Appl. No.:

09/862542

Inventors:

Robert Alan Reeves - Cottonwood AZ, US
Michael J. Stevenson - Sedona AZ, US

International Classification:

B32B 15/04
B32B 7/12

US Classification:

428343, 428354, 428349

Abstract:

This invention is an indica transfer and method for its use to impart indica to polyolefin objects during rotational molding. The transfer is a laminate of at least two coats on a carrier sheet, which is preferably a flexible, transparent polymer sheet. The coats, as successive layers on the carrier sheet are: an indica coat of indica material in a graphic or alphanumerical array and a top coat of a top-coat pressure sensitive adhesive. Preferably the transfer also includes a backing coat of a backing-coat pressure sensitive adhesive between the carrier sheet and the indica coat, The pressure sensitive adhesive used for the top coat has a transition temperature less than the mold surface temperature onto which the transfer is applied to enable transfer of the coats to the interior surface of a rotational mold. The pressure sensitive adhesive used for the backing coat has a transition temperature greater than the surface temperature of the mold to which the transfer is to be applied, and both pressure sensitive adhesives have transition temperatures which are below the molding temperature and preferably below the melt temperature of the molding polyolefin used to form the molded part.

US Patent:

7156940, Jan 2, 2007

Filed:

Apr 14, 2006

Appl. No.:

11/404316

Inventors:

Michael J. Stevenson - Sedona AZ, US
Robert A. Reeves - Cottonwood AZ, US

International Classification:

B29C 47/00
B29C 47/02
B29C 47/06
B28B 1/00
B29C 33/34
B28B 1/20
B28B 1/24

US Classification:

156245, 156125, 156500, 101129, 101114, 264310, 264316

Abstract:

This invention is a method for the precise placement of indicia with high resolution into the wall of a hollow-form, molded plastisol part. The method includes the steps of preparing a plastisol graphic transfer by casting a base layer of plastisol onto a carrier sheet, printing indicia with pigmented plastisols onto the base layer of plastisol to form a graphic transfer, and over printing the graphic transfer with a body layer of plastisol. After each layer of plastisol is deposit, the layer cured by heating before depositing the next layer and the transfer is heated to cure the final, body layer. The transfer is applied to a selected inside surface of a conventional rotational mold by applying a high-solvent-content adhesive to the mold surface, stripping the plastisol transfer from the carrier sheet and applying it against the adhesive coated mold surface, and pressing the transfer against the adhesive-coated surface of the mold, permitting the applied transfer to dry over a short interval and then continuing with an otherwise conventional rotomolding or slush molding process to obtain a molded hollow form part having the indicia permanently fused into the wall of the part.

US Patent:

7446146, Nov 4, 2008

Filed:

Sep 23, 2004

Appl. No.:

10/947780

Inventors:

Michael J. Stevenson - Sedona AZ, US
Robert A. Reeves - Cottonwood AZ, US

International Classification:

C08K 5/01

US Classification:

524474, 524476

Abstract:

The polyethylene caulking composition of the invention is a mixture of a carrier and binder component and polyethylene powder. The carrier and binder component is a liquid hydrocarbon oil. The polymer is finely subdivided polyethylene, preferably ultra high molecular weight, having a low melt index, no greater than 30. The composition is thixotropic with a consistency of toothpaste, typically having a stirred viscosity up to 30,000 centipoise at ambient temperature, which is suitable for use as a caulking composition. The caulking composition of the invention can be extruded at low pressures through a caulking gun or from a squeeze tube to plug vent holes or perforations in molded, hollow-form polyethylene parts, or applied as a caulk onto the flange surfaces of rotational molds.

US Patent:

7465473, Dec 16, 2008

Filed:

Sep 22, 2003

Appl. No.:

10/667746

Inventors:

Michael J. Stevenson - Sedona AZ, US
Robert Alan Reeves - Cottonwood AZ, US

International Classification:

B05D 1/36

US Classification:

427202

Abstract:

A permanent, roughened or textured surface is applied to parts molded from polyolefins, particularly from polyethylene by applying to the surface of the part a coating mixture of a tackifier resin and polyolefin particles in a liquid carrier and incorporating a granular or particulate matter in the coating, either by application to the coating or by admixing the granular or particulate matter into the coating mixture. The coated surface is heated to the melt temperature of the polyolefin surface for a short time, sufficient to gel the polyolefin particles of the coating into the surface of the part, but insufficient to cause any thermal distortion of the part.