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1. US6302992 - Retroreflective cube corner sheeting, molds therefore, and methods of making the same

Office
États-Unis d'Amérique
Numéro de la demande 09656697
Date de la demande 07.09.2000
Numéro de publication 6302992
Date de publication 16.10.2001
Numéro de délivrance 6302992
Date de délivrance 16.10.2001
Type de publication B1
CIB
B29D 11/00
BTECHNIQUES INDUSTRIELLES; TRANSPORTS
29TRAVAIL DES MATIÈRES PLASTIQUES; TRAVAIL DES SUBSTANCES À L'ÉTAT PLASTIQUE EN GÉNÉRAL
DFABRICATION D'OBJETS PARTICULIERS, À PARTIR DE MATIÈRES PLASTIQUES OU DE SUBSTANCES À L'ÉTAT PLASTIQUE
11Fabrication d'éléments optiques, p.ex. lentilles ou prismes
B32B 31/00
BTECHNIQUES INDUSTRIELLES; TRANSPORTS
32PRODUITS STRATIFIÉS
BPRODUITS STRATIFIÉS, c. à d. FAITS DE PLUSIEURS COUCHES DE FORME PLANE OU NON PLANE, p.ex. CELLULAIRE OU EN NID D'ABEILLES
31Fabrication des produits stratifiés
B29C 33/38
BTECHNIQUES INDUSTRIELLES; TRANSPORTS
29TRAVAIL DES MATIÈRES PLASTIQUES; TRAVAIL DES SUBSTANCES À L'ÉTAT PLASTIQUE EN GÉNÉRAL
CFAÇONNAGE OU ASSEMBLAGE DES MATIÈRES PLASTIQUES; FAÇONNAGE DES MATIÈRES À L'ÉTAT PLASTIQUE NON PRÉVU AILLEURS; POST-TRAITEMENT DES PRODUITS FAÇONNÉS, p.ex. RÉPARATION
33Moules ou noyaux; Leurs détails ou accessoires
38caractérisés par la matière ou le procédé de fabrication
G02B 5/12
GPHYSIQUE
02OPTIQUE
BÉLÉMENTS, SYSTÈMES OU APPAREILS OPTIQUES
5Eléments optiques autres que les lentilles
12Réflecteurs reflex
G02B 5/124
GPHYSIQUE
02OPTIQUE
BÉLÉMENTS, SYSTÈMES OU APPAREILS OPTIQUES
5Eléments optiques autres que les lentilles
12Réflecteurs reflex
122du type en sommet de cube, en trièdre ou en réflecteur triple
124plusieurs éléments réfléchissants faisant partie d'une plaque ou d'une feuille formant un tout
CPC
B29D 11/00625
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
11Producing optical elements, e.g. lenses or prisms
00605Production of reflex reflectors
00625Moulds for reflex reflectors
G02B 5/124
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
12Reflex reflectors
122cube corner, trihedral or triple reflector type
124plural reflecting elements forming part of a unitary plate or sheet
Y10T 156/1052
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
156Adhesive bonding and miscellaneous chemical manufacture
10Methods of surface bonding and/or assembly therefor
1052with cutting, punching, tearing or severing
Y10T 156/1082
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
156Adhesive bonding and miscellaneous chemical manufacture
10Methods of surface bonding and/or assembly therefor
1052with cutting, punching, tearing or severing
1082Partial cutting bonded sandwich [e.g., grooving or incising]
Déposants 3M Innovative Properties Company
Inventeurs Smith, Kenneth L.
Benson, Gerald M.
Mandataires Jensen, Stephen C.
Données relatives à la priorité 08887390 02.07.1997 US
09656697 07.09.2000 US
Titre
(EN) Retroreflective cube corner sheeting, molds therefore, and methods of making the same
Abrégé
(EN)

A method is disclosed for manufacturing a plurality of laminae for use in a mold suitable for use in forming retroreflective cube corner articles. Each lamina has opposing first and second major surfaces defining therebetween a first reference plane. Each lamina further includes a working surface connecting the first and second major surfaces. The working surface defines a second reference plane substantially parallel to the working surface and perpendicular to the first reference plane and a third reference plane perpendicular to the first reference plane. The method includes (a) orienting a plurality of laminae to have their respective first reference planes parallel to each other and disposed at a first angle relative to a fixed reference axis, (b) forming a plurality of cube corner elements on the working surfaces of the plurality of the laminae, wherein the plurality of cube corner elements have three approximately mutually perpendicular lateral faces that mutually intersect to define a cube corner element peak, and (c) removing a plurality of laminae from the assembly to alter the configuration of the mold surface.