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1. WO1997019815 - FEUILLE REFLECHISSANTE CELLULAIRE

Numéro de publication WO/1997/019815
Date de publication 05.06.1997
N° de la demande internationale PCT/US1996/019159
Date du dépôt international 02.12.1996
Demande présentée en vertu du Chapitre 2 17.06.1997
CIB
B29C 65/08 2006.01
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
65Assemblage d'éléments préformés; Appareils à cet effet
02par chauffage, avec ou sans pressage
08avec des vibrations ultrasonores
B29D 11/00 2006.01
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
CPC
B29C 65/086
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
65Joining ; or sealing; of preformed parts ; , e.g. welding of plastics materials; Apparatus therefor
02by heating, with or without pressure
08using ultrasonic vibrations
083using a rotary sonotrode or a rotary anvil
086using a rotary anvil
B29C 66/1122
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
66General aspects of processes or apparatus for joining preformed parts
01General aspects dealing with the joint area or with the area to be joined
05Particular design of joint configurations
10particular design of the joint cross-sections
11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
112Single lapped joints
1122Single lap to lap joints, i.e. overlap joints
B29C 66/438
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
66General aspects of processes or apparatus for joining preformed parts
40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
41Joining substantially flat articles
43Joining a relatively small portion of the surface of said articles
438Joining sheets for making hollow-walled, channelled structures or multi-tubular articles
B29C 66/45
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
66General aspects of processes or apparatus for joining preformed parts
40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
41Joining substantially flat articles
45Joining of substantially the whole surface of the articles
B29C 66/71
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
66General aspects of processes or apparatus for joining preformed parts
70characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
71characterised by the composition of the plastics material of the parts to be joined
B29C 66/73921
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
66General aspects of processes or apparatus for joining preformed parts
70characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
73characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
739characterised by the material of the parts to be joined being a thermoplastic or a thermoset
7392characterised by the material of at least one of the parts being a thermoplastic
73921characterised by the materials of both parts being thermoplastics
Déposants
  • STIMSONITE CORPORATION [US]/[US]
Inventeurs
  • THIELMAN, W., Scott
Mandataires
  • SANDLER, Ronald, A.
Données relatives à la priorité
08/566,00601.12.1995US
Langue de publication anglais (EN)
Langue de dépôt anglais (EN)
États désignés
Titre
(EN) CELLULAR RETROREFLECTIVE SHEETING
(FR) FEUILLE REFLECHISSANTE CELLULAIRE
Abrégé
(EN)
Cellular retroreflective sheeting (40) comprises a first film (10) of thermoplastic material which has been formed to define arrays of minute cube-corner reflective elements (12) on one face thereof. The reflective elements are covered with a second thin thermoplastic film (36) and the two films together pass over a patterned roller where a series of sonic welding heads (50) rapidly bond the films together forming small cells (52) of retroreflective cube-corner elements (12) in the pattern of the roller. Because the heat generated in the welding process is localized to the pattern of the roller, cell walls may be formed having narrow thickness yet good bonding of the films is achieved. Further, residual heat does not appreciably transfer to adjacent retroreflective elements (12), therefore, distortion of adjacent elements is minimized and a sheeting (40) construction is achieved having superior brilliance and durability as well as maximum retroreflective capability over a wide angular range of incident light. Also disclosed is a method for forming such sheeting (40).
(FR)
Une feuille réfléchissante cellulaire (40) comprend un premier film (10) en matière thermoplastique qui a été façonné pour définir sur une de ses faces des réseaux de minuscules éléments réfléchissants (12) en forme de trièdre trirectangle. Les éléments réfléchissants sont recouverts d'un deuxième film thermoplastique mince (36) puis on fait passer les deux films ensemble sur un cylindre à motifs où une série de têtes (50) de soudage par ultrasons soudent rapidement les films ensemble en formant de petites cellules (52) d'éléments réfléchissants (12) en forme de trièdre trirectangle présents dans le motif du cylindre. Etant donné que la chaleur générée dans le processus de soudage est localisée au niveau du motif du cylindre, des parois de cellules peuvent être formées avec une faible épaisseur ceci n'empêchant pas les deux films d'être bien soudés ensemble. En outre la chaleur résiduelle ne se transfère pas de manière sensible aux éléments réfléchissants adjacents (12), par conséquent la distorsion des éléments adjacents est minimisée et on peut produire une feuille (40) qui se caractérise par une brillance et une durabilité supérieures ainsi que par un pouvoir réfléchissant maximum sur une large plage angulaire de lumière incidente. On décrit également un procédé permettant de former ladite feuille (40).
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