United States Patent No. 4,619,082 - 28th October 1986

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United States Patent  
Ian L. Handricks   

Patent Number:         4,619,082  
Date of Patent:     Oct. 28, 1986   

METHOD OF MANUFACTURING A CONTACT LENS         

INVENTOR:     Ian L. Handricks,  Chalgrove, England        
Assignee:        Contact Lens Supplies Limited, England     
Appl. No.:        663,780
Filed:               Oct. 23, 1984

Foreign Application Priority Data
Oct. 24, 1983 [GB] United Kingdom     8328365

Int. CU                        B24B 1/00
U.S. CI.                      Sl/284 R; 51/216 LP
Field of Search ,     51/284 R, 284 E, 326, 51/216 LP, 217 L, 229, 237 R, 277; 264/1.1, 2.7; 82/1 C, ll

References Cited
U.S. PATENT DOCUMENTS
1,911,153 5/1933 Hill                   51/284
3.030,859 4/1962 Elliot, Jr.         51/284
3.064.531 11/1962 Bullock         51/284
3,100,955 8/1963 Kratt               51/237 R
3,662,040 5/1972 Urbach etal    51/284
Primary Examiner                         Frederick R. Schmidt
Assistant Examiner                      Robert A. Rose
Attorney, Agent, or Firm               Welsh & Katz, Ltd.

ABSTRACT
A contact lens is manufactured by a method involving machining a first face and a reference surface on a blank; mounting the blank in a work holder adapted for accurate mounting on a lathe such that the blank is held with its first face accurately positioned relative to a datum point on the lathe; and machining a second face on the blank. Such method avoids the need for skilled operatives and enables easy manufacture of accurately dimensioned contact lenses.


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