EP 0123891 A3 19860205 - METHOD OF SHAPING A CONVERGENT LENS IN A PLATE MADE OF A TRANSPARENT MINERAL MATERIAL
Title (en)
METHOD OF SHAPING A CONVERGENT LENS IN A PLATE MADE OF A TRANSPARENT MINERAL MATERIAL
Publication
Application
Priority
CH 180083 A 19830331
Abstract (en)
[origin: US4584799A] A method is described of forming a circular convergent lens in a plate of transparent mineral material, which involves grinding the lens with a grinding member having a lesser diameter than the lens and imparting an oscillatory motion to the plate relatively to the grinding wheel. This method also enables self-dressing of the grinding member.
IPC 1-7
IPC 8 full level
C03B 23/02 (2006.01); B24B 13/00 (2006.01); B24B 13/04 (2006.01)
CPC (source: EP US)
B24B 13/00 (2013.01 - EP US); B24B 13/04 (2013.01 - EP US)
Citation (search report)
- [A] US 1563918 A 19251201 - PARSONS HAROLD K
- [A] US 1491383 A 19240422 - DEY GILBERT S
- [A] DE 806532 C 19510614 - FABRICATION BELGE DE LENTILLES
- [A] US 2087687 A 19370720 - HOUCHIN LOWELL L
- [A] US 3905163 A 19750916 - KLEIBER JOSEPH P
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0123891 A2 19841107; EP 0123891 A3 19860205; EP 0123891 B1 19880518; CH 651773 A5 19851015; DE 3471270 D1 19880623; JP S59187449 A 19841024; SG 38991 G 19910726; US 4584799 A 19860429
DOCDB simple family (application)
EP 84103309 A 19840326; CH 180083 A 19830331; DE 3471270 T 19840326; JP 6131984 A 19840330; SG 38991 A 19910517; US 59589984 A 19840402