EP 0322579 A3 19900905 - DEVICE FOR CENTERING OPTICAL LENSES FOR MECHANICAL CLAMPING, ESPECIALLY DURING BEVELLING AND FACETTING
Title (en)
DEVICE FOR CENTERING OPTICAL LENSES FOR MECHANICAL CLAMPING, ESPECIALLY DURING BEVELLING AND FACETTING
Publication
Application
Priority
DE 3744115 A 19871224
Abstract (en)
[origin: EP0322579A2] To centre optical lenses for mechanical clamping, especially during bevelling and facetting, the invention proposes a device with a housing (10) in which a motor drive (M, R) acts via a torque divider (50), drive shafts (14, 14') and transmission elements (16, 16') on centring spindles (18, 18') in alignment with one another. The latter are arranged in guide bearings (22, 22') on projecting parts of the C-shaped housing (10) and are designed as an air bearing. The clamping angle ( alpha ) at the lens (L) can thereby be kept in the range below 2 x 8 DEG , preferably below 2 x 6 DEG . The lower centring spindle (18) in particular is axially adjustable in a free-running manner in the air bearing (22), for which purpose axially parallel and/or index-ring-shaped grooves (90) are provided at the ends of a thin-walled guide sleeve (76), between which peripheral air-cushion zones build up when compressed air is supplied. The axial infeed of the clamping spindle (18) is effected by a clamping device (24) with a yoke plate (26) and a diaphragm piston (32). <IMAGE>
IPC 1-7
IPC 8 full level
B24B 9/14 (2006.01)
CPC (source: EP US)
B24B 9/146 (2013.01 - EP US); Y10T 82/2562 (2015.01 - EP US); Y10T 82/2571 (2015.01 - EP US); Y10T 82/27 (2015.01 - EP US)
Citation (search report)
- [A] DE 2756407 A1 19790621 - PRONTOR WERK GAUTHIER GMBH
- [A] US 3599377 A 19710817 - DARTNELL ROBERT C
- [A] DE 8702561 U1 19870604
Designated contracting state (EPC)
CH ES FR GB IT LI
DOCDB simple family (publication)
EP 0322579 A2 19890705; EP 0322579 A3 19900905; EP 0322579 B1 19930203; DE 3744115 A1 19890706; DE 3744115 C2 19940331; ES 2037805 T3 19930701; US 4951421 A 19900828
DOCDB simple family (application)
EP 88119934 A 19881130; DE 3744115 A 19871224; ES 88119934 T 19881130; US 28992088 A 19881223