Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1991-06-28
1992-10-27
Rachuba, M.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51209DL, 51DIG34, B24D 1700
Patent
active
051578808
ABSTRACT:
A lap used for the grinding, fining and polishing of glass and plastic lenses is constructed of a one-piece injection-molded reinforced polymer body. The front surface of the lap is curved and adapted to receive an abrasive pad. The rear of the lap has a skeletal rib structure of projecting interconnected ribs. Polymers suitable for forming the lap include various crystalline polymers and copolymers having adequate chemical resistance, strength, rigidity and thermal resistance.
REFERENCES:
patent: 838019 (1906-12-01), Gardner
patent: 3225497 (1965-12-01), Brandt
patent: 3685214 (1972-08-01), Sarofeen
patent: 4001981 (1977-01-01), Wood
patent: 4212136 (1980-07-01), Stertzbach
patent: 4212137 (1980-07-01), Rue
Article: Bulletin No. 25, "Plastic Sphere Lap Package", 1971 (one page).
Rotenberg Don H.
Whitmarsh Milton F.
Coburn Optical Industries
Rachuba M.
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