Jan 29, 2009
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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