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1. (WO1997016754) GLASS-MICROSPHERE COATED ARTICLE HAVING A SMOOTH SURFACE AND METHOD FOR ITS PREPARATION
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/016754 International Application No.: PCT/US1996/017336
Publication Date: 09.05.1997 International Filing Date: 28.10.1996
Chapter 2 Demand Filed: 24.05.1997
IPC:
G02B 5/128 (2006.01)
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5
Optical elements other than lenses
12
Reflex reflectors
126
including curved refracting surface
128
transparent spheres being embedded in matrix
Applicants:
MINNESOTA MINING AND MANUFACTURING COMPANY [US/US]; 3M Center P.O. Box 33427 Saint Paul, MN 55133-3427, US
Inventors:
LAPERRE, James, D.; US
Agent:
DOWDALL, Janice, L. ; Minnesota Mining and Manufacturing Company Office of Intellectual Property Counsel P.O. Box 33427 Saint Paul, MN 55133-3427, US
WERNER, Hans-Karsten; P.O. Box 102241 D-50462 Köln, DE
Priority Data:
08/552,85003.11.1995US
Title (EN) GLASS-MICROSPHERE COATED ARTICLE HAVING A SMOOTH SURFACE AND METHOD FOR ITS PREPARATION
(FR) ARTICLE A SURFACE LISSE REVETU DE MICROSPHERES DE VERRE A FAIBLE INDICE DE REFRACTION, ET SON PROCEDE DE PREPARATION
Abstract:
(EN) This invention relates to glass microsphere (bead) coated articles (5) having an upper surface comprising a layer of low refractive index transparent glass microspheres (1) such as those made from recycled ordinary glass. The articles of the invention have an extremely smooth tactile feel and a low friction surface even though they can be prepared from glass microspheres intermixed with abrasive irregularly shaped glass particles (2). The invention relates to a method making the bead coated articles of the invention and transfer articles that can be used to make the bead coated articles of the invention.
(FR) Articles revêtus de microsphères (billes) de verre et dotés d'une surface supérieure comportant une couche de microsphères de verre transparent à faible indice de réfraction telles que celles constituées de verre ordinaire recyclé. Ces articles sont extrêmement lisses au toucher et présentent un faible coefficient de frottement en surface bien que l'on puisse les préparer à partir de microsphères de verre mélangées à des particules de verre abrasives de forme irrégulière. On décrit également un procédé de fabrication de ces articles revêtus de billes et des articles de transfert utilisables dans la fabrication desdits articles revêtus de billes.
Designated States: CA, JP, KR
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0870209JPH11514943 CA2234652KR1019990067297