US3665659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of the circumference of a spectacle lens
Assignee: Wernicke and Co GmbH
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Filing: 1969-10-01
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Granted: 1972-05-30
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Expires: 1989-10-01
Abstract
Abstract The invention relates to a method for the production of the circumference of a spectacle lens with cutting off the edge of the blank and grinding according to a template or a glass lens mount in order to obtain the final lens form. The subject of the invention is also an apparatus for carrying out this method.
Inventors
- 👤 Fritz Kotting
- 👤 Gotteried Gas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:15
CPC Classifications
C; C03; C03B; C03B33/00; C03B33/02; C03B33/04; B; B24; B24B; B24B9/00; B24B9/02; B24B9/06; B24B9/08; B24B9/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
A method for the production of spectacle lenses having noncircular peripheries by cutting off the edges of the blanks and grinding the blanks to a desired shaped circumference using a templet to produce a final lens shape; characterized by the steps of scoring the lens surface by two straight parallel cuts external of said circumference to form edge sections and the remaining edge portions while the blanks are successively drawn under a pair of scoring tools, breaking off the edge sections of the blank lying outside the area formed by the two cuts, and grinding off the remaining edge portions protruding over the circumference of said final lens shape.
Claim 2
Independent Claim
109 words
A method for the production of spectacle lenses having noncircular peripheries by cutting off the edges of the blanks and grinding the blanks to a desired shaped circumference using a templet to produce a final lens shape; characterized by the steps of scoring the lens surface by two straight parallel cuts external of said circumference to form edge sections and the remaining edge portions while the blanks are successively drawn under a pair of scoring tools, breaking off the edge sections of the blank lying outside the area formed by the two cuts, and grinding off the remaining edge portions protruding over the circumference of said final lens shape.
Claim 3
Dependent Claim
32 words
A method according to claim 1, characterized by making parallel cuts by said scoring tools in a direction which is parallel to an axis of the final lens having the longest length.
Claim 4
Dependent Claim
25 words
A method according to claim 1, characterized by making two pairs of parallel cuts by said scoring tools, said pairs disposed perpendicular to each other.
Claim 5
Dependent Claim
24 words
A method according to claim 1 characterized by moving the lens blanks in sequence under a scoring means by means of a resilient belt.
References Cited (Backward Citations)
US2352616A
Cited
US3286893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |