Apparatus for preparing an eyeglass lens having sensors for tracking mold assemblies

• US 6,676,399 B1
• Filed: 02/20/2001
• Issued: 01/13/2004
• Est. Priority Date: 02/20/2001
• Status: Expired due to Term

• Current Assignee: Vision Dynamics LLC (New England Low Vision & Blindness)
• Original Assignee: Q2100, Inc.
• Inventors: Foreman, John T.
• Primary Examiner(s): Mackey, James P.
• Assistant Examiner(s): Heckenberg, Donald
• Application Number:
  US09/788,994
• Time in Patent Office: 1,057 Days
• Field of Search: 425/135, 425/169, 425/174.4, 425/808, 425/DIG.108, 425/145, 264/1.38
• US Class Current: 425/145
• CPC Class Codes: B29D 11/00413 made by moulding between two mould parts which are not in direct contact with one another, e.g. comprising a seal between or on the edges B29D11/00019 - B29D11/00355, B29D11/00423, B29D11/00432 take precedence
• CPC Class Codes: B29D 11/00442 Curing the lens material
• CPC Class Codes: B29D 11/00528 Consisting of two mould halves joined by an annular gasket
• CPC Class Codes: B29D 11/00538 Feeding arrangements
• CPC Class Codes: Y10S 425/808 Lens mold

Abstract

A high volume lens curing system is described. The high volume lens curing system may be configured to cure multiple eyeglass lenses in a continuous manner. An embodiment of the lens curing system includes an apparatus for preparing an eyeglass lens. The apparatus may include one or more lens curing units and a mold assembly. At least one lens curing unit may include a heating system. In some embodiments, the apparatus may include a conveyor system configured to convey the mold assembly to, from or through one or more lens curing units. Sensors may be disposed in one or more lens curing units. The sensors may be configured to produce signals that allow the progress of the mold assembly through the apparatus to be tracked. In some embodiments, the apparatus may include an annealing unit, an air distributor and filters.

Claims

1. An apparatus for preparing an eyeglass lens, comprising:

a first lens curing unit comprising a first activating light source, wherein the first activating light is configured to direct activating light toward a mold assembly during use;

a second lens curing unit comprising a second activating light source and heating system, wherein the second activating light source is configured to direct activating light toward a mold assembly during use; and

wherein the heating system is configured to heat the interior of the second lens curing unit;

a conveyor system configured to convey the mold assembly from the first lens curing unit into and through the second lens curing unit;

a first sensor disposed in the first lens curing unit, wherein the sensor is configured to sense when a mold assembly enters the first curing unit, and

a second sensor disposed in the second curing unit, wherein the second sensor is configured to sense when a mold assembly enters the second curing unit;

wherein the first and second sensors are configured to produce signals that allow the progress of a mold assembly through the apparatus to be monitored.

2. The apparatus of claim 1, wherein the mold assembly resides on a mold assembly holder, the mold assembly holder comprising a body and an indentation formed in the body, wherein the indentation is complementary to the shape of the mold assembly.

3. The apparatus of claim 1, wherein the first activating light source is an ultraviolet light source.

4. The apparatus of claim 1, wherein the second activating light source is an ultraviolet light.

5. The apparatus of claim 1, wherein the first and second activating light sources are ultraviolet lights.

6. The apparatus of claim 1, wherein the first and second activating light sources have substantially the same spectral output.

7. The apparatus of claim 1, wherein the first and second activating light sources have a peak light intensity at a range of about 385 nm to about 490 nm.

8. The apparatus of claim 1, wherein the first activating light source comprises a first set of lamps and a second set of lamps, wherein the first and second set of lamps are positioned on opposite sides of the first curing unit.

9. The apparatus of claim 1, further comprising a filter disposed directly adjacent to the first activating light source, the, filter being configured to manipulate an intensity of the activating light emanating from the first activating light source.

10. The apparatus of claim 1, further comprising a filter disposed directly adjacent to the second activating light source, the filter being configured to manipulate an intensity of the activating light emanating from the second activating light source.

11. The apparatus of claim 1, further comprising a first filter disposed directly adjacent to the first activating light source, the filter being configured to manipulate an intensity of the activating light emanating from the first activating light source, and further comprising a second filter disposed directly adjacent to the second activating light source, the filter being configured to manipulate an intensity of the activating light emanating from the second activating light source.

12. The apparatus of claim 1, further comprising an air distributor positioned within the second curing unit, the air distributor being configured to circulate air within the second curing unit during use.

13. The apparatus of claim 1, further comprising an anneal unit, the anneal unit comprising an anneal unit heating system, wherein the anneal unit heating system is configured to heat the interior of the anneal unit.

14. The apparatus of claim 1, further comprising an anneal unit, the anneal unit comprising an anneal unit heating system, wherein the anneal unit heating system is configured to heat the interior of the anneal unit, and wherein the anneal unit heating system is configured to heat the interior of the anneal unit to a temperature of up to about 250°

F.

15. The apparatus of claim 1, further comprising an anneal unit, the anneal unit comprising an anneal unit heating system, wherein the anneal unit heating system is configured to heat the interior of the anneal unit, and wherein the anneal unit further comprises an anneal unit conveyor system configured to convey the mold assembly through the anneal unit.

16. The apparatus of claim 1, further comprising a programmable controller configured to substantially simultaneously control operation of the first curing unit and the second curing unit during use.

17. The apparatus of claim 1, further comprising a programmable controller configured to control operation of the first curing unit as a function of the eyeglass lens prescription.

18. The apparatus of claim 1, wherein the first activating light source comprises a fluorescent lamp, and wherein the first activating light source further comprises a flasher ballast system coupled to the fluorescent lamp.

19. The apparatus of claim 1, wherein the second activating light source comprises a fluorescent lamp, and wherein the second activating light source further comprises a flasher ballast system coupled to the fluorescent lamp.

20. The apparatus of claim 1, wherein the first activating light source comprises two or more lamps, and wherein the lamps are independently operable.

21. The apparatus of claim 1, wherein the conveyor system comprises a continuous flexible member extending from the first curing unit through the second curing unit, wherein the flexible member is configured to interact with a mold assembly to convey the mold assembly through the first curing unit, to the second curing unit, and through the second curing unit.

22. The apparatus of claim 1, wherein the conveyor system comprises two discrete conveyors, wherein the first conveyor is configured to convey the mold assembly from the first curing unit to the second curing unit, and wherein the second conveyor is configured to convey the mold assembly through the second curing unit.

23. An apparatus for preparing an eyeglass lens, comprising:

a first lens curing unit comprising a first activating light source, wherein the first activating light source is configured to direct activating light toward a mold assembly during use;

a second lens curing unit;

a conveyor system configured to convey the mold assembly through the first lens curing unit into and through the second lens curing unit;

a first sensor disposed in the first lens curing unit, wherein the sensor is configured to sense when a mold assembly enters the first lens curing unit; and

a second sensor disposed in the second lens curing unit, wherein the second sensor is configured to sense when a mold assembly enters the second lens curing unit.

24. The apparatus of claim 23, wherein the first sensor is configured to produce a signal that allows the progress of the mold assembly through the first lens curing unit.

25. The apparatus of claim 23, wherein the mold assembly resides on a mold assembly holder, the mold assembly holder comprising a body and an indentation formed in the body, wherein the indentation is complementary to the shape of the mold assembly.

26. The apparatus of claim 23, wherein the first activating light source is an ultraviolet light source.

27. The apparatus of claim 23, wherein the first activating light source has peak light intensity at a range of about 385 nm to about 490 nm.

28. The apparatus of claim 23, wherein the first activating light source comprises a fluorescent lamp, and wherein the first activating light source further comprises a flasher ballast system coupled to the fluorescent lamp.

29. The apparatus of claim 23, wherein the first activating light source comprises a first set of lamps and a second set of lamps, wherein the first and second set of lamps are positioned on opposite sides of the first lens curing unit.

30. The apparatus of claim 23, wherein the first activating light source comprises two or more lamps, and wherein the lamps are independently operable.

31. The apparatus of claim 23, further comprising a programmable controller configured to control operation of the first lens curing unit as a function of an eyeglass lens prescription.

32. The apparatus of claim 23, further comprising an anneal unit, the anneal unit comprising an anneal unit heating system, wherein the anneal unit heating system is configured to heat the interior of the anneal unit.

33. The apparatus of claim 23, further comprising an anneal unit, the anneal unit comprising an anneal unit heating system, wherein the anneal unit heating system is configured to heat the interior of the anneal unit, and wherein the anneal unit heating system is configured to heat the interior of the anneal unit to a temperature of up to about 250°

F.

34. The apparatus of claim 23, further comprising an anneal unit, the anneal unit comprising an anneal unit heating system, wherein the anneal unit heating system is configured to heat the interior of the anneal unit, and wherein the anneal unit further comprises an anneal unit conveyor system configured to convey the mold assembly through the anneal unit.

35. The apparatus of claim 23, further comprising a filter disposed directly adjacent to the first activating light source, the filter being configured to manipulate an intensity of the activating light emanating from the first activating light source.

36. The apparatus of claim 23, wherein the second sensor is configured to sense when a mold assembly enters the second lens curing unit, wherein the second sensor is configured to produce a signal that allows the progress of the mold assembly through the apparatus to be monitored.

37. The apparatus of claim 23, wherein the second lens curing unit comprises:

an second activating light source, wherein the second activating light source is configured to direct activating light toward the mold assembly during use; and

a heating system, wherein the heating system is configured to heat the interior of the second lens curing unit.

38. The apparatus of claim 23, further comprising a programmable controller wherein the programmable controller is configured to substantially simultaneously control operation of the first lens curing unit and the second lens curing unit during use.

39. The apparatus of claim 23, wherein the conveyor system comprises a continuous flexible member extending from the first lens curing unit through the second lens curing unit;

and wherein the flexible member is configured to interact with a mold assembly to convey the mold assembly through the first lens curing unit and through the second lens curing unit.

40. The apparatus of claim 23, wherein the conveyor system comprises two discrete conveyors, wherein the first conveyor is configured to convey the mold assembly from the first lens curing unit to the second lens curing unit;

and wherein the second conveyor is configured to convey the mold assemblies through the second lens curing unit.

41. The apparatus of claim 23, wherein the conveyor system comprises a flexible member configured to interact with a mold assembly, wherein the flexible member is coupled to a motor configured to move the flexible member through the conveyor system.

42. The apparatus of claim 23, wherein the second lens curing unit comprises an air distributor, wherein the air distributor is configured to circulate air within the second lens curing unit during use.

43. The apparatus of claim 23, wherein the second lens curing unit comprises a second activating light source, wherein the second activating light source comprises a fluorescent lamp, and wherein the second activating light source further comprises a flasher ballast system coupled to the fluorescent lamp.

44. The apparatus of claim 23, wherein the second lens curing unit comprises a second activating light source, wherein the second activating light source is configured to direct activating light toward the mold assembly during use and wherein the first activating light source and the second activating light source are ultraviolet lights.

45. The apparatus of claim 23, wherein the second lens curing unit comprises a second activating light source, wherein the second activating light source is configured to direct activating light toward the mold assembly during use and wherein the first activating light source and the second activating light source have substantially the same spectral output.

46. The apparatus of claim 23, wherein the second lens curing unit comprises a second activating light source, wherein the second activating light source is configured to direct activating light toward the mold assembly during use and wherein the first activating light source and the second activating light source have a peak light intensity at a range of about 385 nm to about 490 nm.

47. The apparatus of claim 23, wherein the second lens curing unit comprises a second activating light source, wherein the second activating light source is configured to direct activating light towards the mold assembly during use, and wherein the second sensor is configured to produce a signal that allows the progress of the mold assembly through the apparatus to be monitored.

48. The apparatus of claim 23, wherein the second lens curing unit comprises:

a second activating light source, wherein the second activating light source is configured to direct activating light toward a mold assembly during use; and

a filter disposed directly adjacent to the second activating light source, the filter being configured to manipulate an intensity of the activating light emanating from the activating light source.

49. The apparatus of claim 23, wherein the second lens curing unit comprises:

a second activating light source, wherein the second activating light source is configured to direct activating light toward a mold assembly during use;

a first filter disposed directly adjacent to the first activating light source, the first filter being configured to manipulate an intensity of the first activating light emanating from the first activating light source; and

a second filter disposed directly adjacent to the second activating light source, the second filter being configured to manipulate an intensity of the activating light emanating from the second activating light source.