CA2145098A1 - Method and apparatus for masking removable optical lens markings during lens grinding - Google Patents

Method and apparatus for masking removable optical lens markings during lens grinding

Info

Publication number
CA2145098A1
CA2145098A1 CA002145098A CA2145098A CA2145098A1 CA 2145098 A1 CA2145098 A1 CA 2145098A1 CA 002145098 A CA002145098 A CA 002145098A CA 2145098 A CA2145098 A CA 2145098A CA 2145098 A1 CA2145098 A1 CA 2145098A1
Authority
CA
Canada
Prior art keywords
mask
lens
markings
masking
optical lens
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002145098A
Other languages
French (fr)
Other versions
CA2145098C (en
Inventor
John R. Ohlin, Jr.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Innovative Properties Co
Original Assignee
John R. Ohlin, Jr.
Venture Tape Corp.
Venture Tape Corporation
3M Innovative Properties Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/947,706 external-priority patent/US5343657A/en
Application filed by John R. Ohlin, Jr., Venture Tape Corp., Venture Tape Corporation, 3M Innovative Properties Company filed Critical John R. Ohlin, Jr.
Publication of CA2145098A1 publication Critical patent/CA2145098A1/en
Application granted granted Critical
Publication of CA2145098C publication Critical patent/CA2145098C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

A method and apparatus for protecting removable markings (12) on an optical lens (10) during grinding thereof to a desired prescription. A mask (18) is placed over the markings prior to application of an adhesive tape (20), to which a low temperature alloy block (24) is bonded for holding of the lens during grinding. The mask preferably covers only the markings, and is transparent to allow alignment thereof. Preferably the mask is held in place on the lens surface without the use of an adhesive, although a low tack adhesive may be used which does not remove the markings when the mask is peeled away from the lens. A
preferred material for the mask is a static cling vinyl.
CA002145098A 1992-09-18 1993-09-14 Method and apparatus for masking removable optical lens markings during lens grinding Expired - Lifetime CA2145098C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/947,706 US5343657A (en) 1992-09-18 1992-09-18 Method and apparatus for masking removable optical lens markings during lens grinding
US07/947,706 1992-09-18
PCT/US1993/008738 WO1994006598A1 (en) 1992-09-18 1993-09-14 Method and apparatus for masking removable optical lens markings during lens grinding

Publications (2)

Publication Number Publication Date
CA2145098A1 true CA2145098A1 (en) 1994-03-31
CA2145098C CA2145098C (en) 2005-12-06

Family

ID=35519626

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002145098A Expired - Lifetime CA2145098C (en) 1992-09-18 1993-09-14 Method and apparatus for masking removable optical lens markings during lens grinding

Country Status (1)

Country Link
CA (1) CA2145098C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9545765B2 (en) * 2011-12-15 2017-01-17 Essilor International (Compagnie Generale D'optique) Method of blocking an optical lens

Also Published As

Publication number Publication date
CA2145098C (en) 2005-12-06

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Legal Events

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