Edge finishing process for glass or ceramic disks used in...

Abrading – Abrading process – Glass or stone abrading

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C451S036000, C451S180000, C451S439000, C029S424000, C428S043000

Reexamination Certificate

active

06860795

ABSTRACT:
The circumferential edges of glass or ceramic disks used in disk drive data storage devices are preferably finished by ductile grinding to produce an essentially fracture-free surface, which is not chemically strengthened. Preferably, the material is glass, and both the inner and outer edges of the disk are finished. Edge finishing is preferably achieved in a two-stage process, involving a coarse grind and a ductile grind, using air bearing spindles rotated at high speed for grinding wheels and workpiece. Preferably, the grinding wheels are shaped to provide a radius at the juncture of the circumferential edges and flat disk surfaces.

REFERENCES:
patent: 3834083 (1974-09-01), Hoshi et al.
patent: 4031667 (1977-06-01), Schestedt
patent: 5447466 (1995-09-01), Wang et al.
patent: 5554063 (1996-09-01), Millay et al.
patent: 5658194 (1997-08-01), Micheletti
patent: 5718615 (1998-02-01), Boucher et al.
patent: 5727990 (1998-03-01), Hasegawa et al.
patent: 5738563 (1998-04-01), Shibata
patent: 5928066 (1999-07-01), Hasegawa et al.
patent: 5944584 (1999-08-01), Toyama
patent: 6045436 (2000-04-01), Rieger et al.
patent: 6174222 (2001-01-01), Sato et al.
patent: 6319100 (2001-11-01), Denda et al.
patent: 6363599 (2002-04-01), Bajorek
patent: 6475073 (2002-11-01), Naoi
patent: 0 759 339 (1997-02-01), None
patent: 1 033 351 (2000-09-01), None
patent: 2 337 712 (1999-12-01), None
patent: 1005759 (1989-01-01), None
patent: 4069150 (1992-06-01), None
patent: 5023961 (1993-02-01), None
patent: WO 0064631 (2000-11-01), None
patent: WO 0110595 (2001-02-01), None
M. G. Schwabel et al, “Fixed Abrasive Grinding of Glass”, published inFinishing of Advanced Ceramics and Glasses(R. Sabia, et al, editors; American Ceramic Society, 1999; pp. 175-183).
N. S. Ong et al., “Semi-Ductile Grinding and Polishing”, Journal of Materials Processing Technology 83 (1998), pp. 261-266.
M. C. Shaw,Principles of Abrasive Processing, Clarendon Press (1996), pp. 552-558.
M. J. Ball, et al., “Electrolytically Assisted ‘Ductile’ Mode Diamond Grinding of BK7 and SF10 Optical Glasses”, SPIE vol. 1573 (1991); pp. 30-38.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Edge finishing process for glass or ceramic disks used in... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Edge finishing process for glass or ceramic disks used in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Edge finishing process for glass or ceramic disks used in... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3425057

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.