Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1985-09-03
1987-03-10
Whitehead, Harold D.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
511313, B24B 4910
Patent
active
046482121
ABSTRACT:
A machine for grinding an object, such as a printed circuit board coupon, having a region to be exposed and having a novel control track that has at least a portion of the rear edge of the track precisely located with respect to a predetermined grinding depth for the region is provided according to this invention. The grinding machine includes means for engaging the object with an abrasive device and means, interconnected with the control track on the object, for disengaging the object and the abrasive device when a break in the track has been ground.
REFERENCES:
patent: 2136036 (1938-11-01), Avery
patent: 4014141 (1977-03-01), Riddle
patent: 4477968 (1984-10-01), Kracke
patent: 4481738 (1984-11-01), Tabuchi
patent: 4481741 (1984-11-01), Bouladon
IBM Tech. Disclosure Bulletin, vol. 13, No. 4, "Polishing Apparatus", P. J. Grandison, 9-1970.
Dafnoulelis Christos V.
Dawson Thomas F.
Ewing, Jr. Paul C.
Martin Jacob H.
Denninger Douglas E.
Iandiorio Joseph S.
The Charles Stark Draper Laboratory Inc.
Whitehead Harold D.
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