EP 0759834 A1 19970305 - NC-GRINDING PROCESS FOR THE CIRCUMFERENTIAL EDGE AND TOP FACET OF A SPECTACLE LENS
Title (en)
NC-GRINDING PROCESS FOR THE CIRCUMFERENTIAL EDGE AND TOP FACET OF A SPECTACLE LENS
Title (de)
VERFAHREN ZUM CNC-GESTEUERTEN FORMSCHLEIFEN DES UMFANGSRANDES UND DER DACHFACETTE EINES BRILLENGLASES
Title (fr)
PROCEDE DE MEULAGE A COMMANDE NUMERIQUE DU BORD PERIPHERIQUE ET DE LA FACETTE SUPERIEURE D'UN VERRE DE LUNETTES
Publication
Application
Priority
- DE 4417533 A 19940519
- EP 9501882 W 19950517
Abstract (en)
[origin: DE4417533A1] A NC-grinding process for the circumferential edge and top facet of a spectacle lens is disclosed. The length of the circumference of the facet-receiving groove apex of a selected spectacle mount is determined, the length of the circumference of the apex of a top facet is determined in the area of the circumferential edge of a spectacle lens to be mounted in said spectacle mount and worked according to the personal optometric data of the spectacle user, the length of the facet-receiving groove is compared with the length of the top facet and if required the position and/or the course of the top facet on the circumferential edge of the spectacle lens is modified, so that the deviation between the length of the facet groove and the length of the top facet lies within predetermined admissible limits. The top facet is then finished according to the values resulting from the comparison and if necessary modified.
IPC 1-7
IPC 8 full level
B24B 9/14 (2006.01); B24B 47/22 (2006.01)
CPC (source: EP US)
B24B 9/148 (2013.01 - EP US); B24B 47/225 (2013.01 - EP US)
Citation (search report)
See references of WO 9532075A1
Designated contracting state (EPC)
DE ES FR GB
DOCDB simple family (publication)
DE 4417533 A1 19951207; DE 4417533 C2 19960321; DE 59502059 D1 19980604; EP 0759834 A1 19970305; EP 0759834 B1 19980429; ES 2117425 T3 19980801; US 5934972 A 19990810; WO 9532075 A1 19951130
DOCDB simple family (application)
DE 4417533 A 19940519; DE 59502059 T 19950517; EP 9501882 W 19950517; EP 95920828 A 19950517; ES 95920828 T 19950517; US 73776396 A 19961119