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US3722143A Expired / Lapsed US ⏱️ 0.0 years remaining

Contact lens edge finishing machine

Assignee: Individual
•
Filing: 1971-01-29
•
Granted: 1973-03-27
•
Expires: 1991-01-29
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Abstract

Abstract A portable machine used to accomplish the final operations in the sequence of fabricating a contact lens. The machine includes a pair of rotating inwardly directed spindles, each having a rubber tip and can be bindingly brought together to firmly support the rotating contact lens while the final operations are effected. A feature of the machine is the lens centering device which accurately positions the geometrical center of the lens in coincident alignment with the rotating axes of the spindles. The machine also includes a movable guidably supported cutting tool for concentrically reducing the diameter and the thickness of the lens at the periphery thereof, a movable guidably supported rotating polishing wheel for blending the newly cut surfaces with the previously ground optic surfaces and polishing the periphery of the lens, a unique mechanical oscillator which cyclically shifts the rotating axis of the polishing wheel so as to automatically and uniformly polish all the newly cut surfaces, i.e., the terminal edge, the convex surface and the concave surface of the lens, and a workpiece enlarger which presents a visual blow-up of: the lens, the cutting tool, and the polishing wheel to the operator.

Inventors

  • 👤 T Cottom

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 08:43
CPC Classifications
B; B24; B24B; B24B9/00; B24B9/02; B24B9/06; B24B9/08; B24B9/14; B24B9/142

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 340 words
A machine for finishing a contact lens and the like comprising a pair of opposed axially aligned inwardly directed rotating spindles each including a resilient contact lens holding means fixedly attached at the innermost ends thereof for sandwiching and firmly holding the lens therewith between said spindles, one of said spindles including lateral leverage means for moving said holding means from a first position whereby the sandwiched lens is bindingly held stationary with respect to said spindles, one of said spindles including lens centering means circumjacent thereto for accurately concentrically positioning the lens between said holding means of said spindles while said holding means are held in said first position by said leverage means, a motor rotatably driving said spindles including positive drive means for synchronically rotating said spindles, cutting means including knife-like edges for substantially wrapping around the peripheral edge of the contact lens; means movably supporting said cutting means for laterally adjusting said cutting means for selective engagement thereof with the circumferential terminal edge, the posterior surface, and the anterior surface of the lens for respectively reducing the diameter and the thickness of the lens adjacent the periphery thereof; polishing means, a motor rotatably driving said polishing means, means movably supporting said rotating polishing means having an inner and an outer end, oscillating means, a motor driving said oscillating means, said means supporting said polishing means adjacent the inner end thereof movably supporting said rotating polishing means; said polishing support means including lateral adjusting means adjacent the inner end thereof for laterally adjusting said polishing means to selectively engage said polishing means with the circumferential terminal edge, the posterior surface and the anterior surface of the lens for finishing the respective outermost circumferential edge and the peripheral surfaces thereof; and said polishing support means adjacent the outer end thereof movably engaging said oscillating means for lateral shifting of the rotating axis of said polishing means so as to cyclically engage a portion thereof with the respective posterior and anterior surfaces adjacent the periphery of the rotating contact lens.
Claim 2
Dependent Claim 340 words
A machine for finishing a contact lens and the like comprising a pair of opposed axially aligned inwardly directed rotating spindles each including a resilient contact lens holding means fixedly attached at the innermost ends thereof for sandwiching and firmly holding the lens therewith between said spindles, one of said spindles including lateral leverage means for moving said holding means from a first position whereby the sandwiched lens is bindingly held stationary with respect to said spindles, one of said spindles including lens centering means circumjacent thereto for accurately concentrically positioning the lens between said holding means of said spindles while said holding means are held in said first position by said leverage means, a motor rotatably driving said spindles including positive drive means for synchronically rotating said spindles, cutting means including knife-like edges for substantially wrapping around the peripheral edge of the contact lens; means movably supporting said cutting means for laterally adjusting said cutting means for selective engagement thereof with the circumferential terminal edge, the posterior surface, and the anterior surface of the lens for respectively reducing the diameter and the thickness of the lens adjacent the periphery thereof; polishing means, a motor rotatably driving said polishing means, means movably supporting said rotating polishing means having an inner and an outer end, oscillating means, a motor driving said oscillating means, said means supporting said polishing means adjacent the inner end thereof movably supporting said rotating polishing means; said polishing support means including lateral adjusting means adjacent the inner end thereof for laterally adjusting said polishing means to selectively engage said polishing means with the circumferential terminal edge, the posterior surface and the anterior surface of the lens for finishing the respective outermost circumferential edge and the peripheral surfaces thereof; and said polishing support means adjacent the outer end thereof movably engaging said oscillating means for lateral shifting of the rotating axis of said polishing means so as to cyclically engage a portion thereof with the respective posterior and anterior surfaces adjacent the periphery of the rotating contact lens.

References Cited (Backward Citations)

US2031380A Cited
US2228563A Cited
US2441472A Cited
US3112581A Cited
US3205625A Cited
US3145506A Cited
US3332172A Cited
US3599377A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-03-26 1976-09-25 1977-03-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-03-26 1980-09-25 1981-03-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-03-26 1984-09-25 1985-03-27 $7700.00 Window Closed / Lapsed

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