US3304586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for blocking lenses
Assignee: Textron Inc
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Filing: 1964-01-20
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Granted: 1967-02-21
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Expires: 1984-01-20
Abstract
No abstract record available.
Inventors
- 👤 Lloyd A Buckminster
- 👤 William A Washburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:12
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/005; B24B13/0052; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
APPARATUS FOR MOLDING ON A LENS BLANK A LENS BLOCK FOR HOLDING THE BLANK IN A LENS-EDGING MACHINE, SAID APPARATUS COMPRISING (A) A MOLD BLOCK HAVING THEREIN A CAVITY OPEN AT ONE SIDE, (B) MEANS FOR CLAMPING A LENS BLANK AGAINST SAID OPEN SIDE SO THAT SAID LENS BLANK COVERS AND CLOSES SAID CAVITY, (C) MEANS INCLUDING A LIGHT SOURCE MOUNTED ON SAID MOLD BLOCK BEHIND SAID CAVITY FOR DIRECTING A PLURALITY OF BEAMS OF LIGHT FROM SAID LIGHT SOURCE THROUGH SAID MOLD BLOCK ONTO SAID LENS BLANK TO ENABLE THE LENS BLANK TO BE PROPERLY POSITIONED ON THE MOLD BLOCK, AND (D) MEANS FOR SUPPLYING MOLTEN METAL TO SAID CAVITY TO MOLD THE LENS BLOCK AND ADHERE IT TO THE LENS BLANK, (E) SAID MOLD BLOCK HAVING THERETHROUGH A PLURALITY OF SPACED HOLES THROUGH WHICH SAID BEAMS OF LIGHT ARE DIRECTED ONTO SAID BLANK, AT LEAST ONE OF SAID HOLES OPENING ON SAID CAVITY, AND AT LEAST TWO OTHER OF SAID HOLES OPENING ON THE FRONT SIDE OF SAID MOLD BLOCK EXTERNALLY OF SAID CAVITY.
Claim 2
Dependent Claim
176 words
APPARATUS FOR MOLDING ON A LENS BLANK A LENS BLOCK FOR HOLDING THE BLANK IN A LENS-EDGING MACHINE, SAID APPARATUS COMPRISING (A) A MOLD BLOCK HAVING THEREIN A CAVITY OPEN AT ONE SIDE, (B) MEANS FOR CLAMPING A LENS BLANK AGAINST SAID OPEN SIDE SO THAT SAID LENS BLANK COVERS AND CLOSES SAID CAVITY, (C) MEANS INCLUDING A LIGHT SOURCE MOUNTED ON SAID MOLD BLOCK BEHIND SAID CAVITY FOR DIRECTING A PLURALITY OF BEAMS OF LIGHT FROM SAID LIGHT SOURCE THROUGH SAID MOLD BLOCK ONTO SAID LENS BLANK TO ENABLE THE LENS BLANK TO BE PROPERLY POSITIONED ON THE MOLD BLOCK, AND (D) MEANS FOR SUPPLYING MOLTEN METAL TO SAID CAVITY TO MOLD THE LENS BLOCK AND ADHERE IT TO THE LENS BLANK, (E) SAID MOLD BLOCK HAVING THERETHROUGH A PLURALITY OF SPACED HOLES THROUGH WHICH SAID BEAMS OF LIGHT ARE DIRECTED ONTO SAID BLANK, AT LEAST ONE OF SAID HOLES OPENING ON SAID CAVITY, AND AT LEAST TWO OTHER OF SAID HOLES OPENING ON THE FRONT SIDE OF SAID MOLD BLOCK EXTERNALLY OF SAID CAVITY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |