Seating ring to hold a mounting block on a progressively...

B - Operations – Transporting – 24 – B

Patent

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51/20

B24B 9/14 (2006.01) B24B 13/005 (2006.01)

Patent

CA 1256700

PRECIS DE LA DIVULGATION: Il s'agit d'une bague d'appui pour ébauche semi-finie d'un palet tel que lentille ophtalmique ou moule, du genre comportant, pour contact avec l'ébauche semi-finie à traiter, un nombre limité de zones d'appui convenablement réparties circulairement autour de l'axe de l'ensemble. Suivant l'inven- tion les plans tangents aux extrémités de chacune desdites zones d'appui font un dièdre entre eux, la surface d'appui qu'offre une telle zone d'appui étant en pratique globalement convexe. Application à la coulée d'un bloc de montage sur la face finie d'une ébauche semi-finie d'une lentille ophtalmi- que progressive.

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