Eyeglass lens forming apparatus with sensor

• US 6,709,257 B2
• Filed: 02/20/2001
• Issued: 03/23/2004
• Est. Priority Date: 02/20/2001
• Status: Expired due to Fees

• Current Assignee: Q2100, Inc.
• Original Assignee: Q2100, Inc.
• Inventors: Foreman, John T., Lattis, Matthew C., Powers, Galen R.
• Primary Examiner(s): Mackey, James P.
• Assistant Examiner(s): Heckenberg, Donald
• Application Number:
  US09/788,999
• Publication Number:
  US 20030042634A1
• Time in Patent Office: 1,127 Days
• Field of Search: 425/135, 425/145, 425/169, 425/174.4, 425/808, 425/DIG.108, 264/1.38
• US Class Current: 425/145
• CPC Class Codes: B29C 2035/0827 using UV radiation
• CPC Class Codes: B29C 2035/0833 using actinic light
• CPC Class Codes: B29C 2071/022 Annealing
• CPC Class Codes: B29C 35/0888 using transparant moulds
• CPC Class Codes: B29C 37/0032 the coating being applied upon the mould surface before introducing the moulding compound, e.g. applying a gelcoat B29C44/14 and B29C44/32 take precedence
• CPC Class Codes: B29C 37/005 Compensating volume or shape change during moulding, in general
• CPC Class Codes: B29D 11/00442 Curing the lens material
• CPC Class Codes: B29K 2105/0002 monomers or prepolymers
• CPC Class Codes: B29L 2011/0016 Lenses
• CPC Class Codes: G02B 5/23 Photochromic filters
• CPC Class Codes: Y10S 425/108 Conveyor
• 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. An embodiment of the lens curing system includes an apparatus for preparing an eyeglass lens. The apparatus may include ones or more lens curing units, a mold assembly and a conveyor system. In some embodiments, the conveyor system may include a controller. In other embodiments, at least one lens curing unit may include a sensor configured to communicate with the controller.

Claims

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

a first lens curing unit comprising a first activating light source, wherein the first lens curing unit is configured to produce activating light directed 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 controller coupled to the conveyor system, the controller being configured to control the movement of the conveyor system; and

a 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 wherein the sensor produces a control signal to the controller, and wherein the controller controls the movement of the conveyor system in response to receiving the control signal.

2. The apparatus of claim 1, wherein the sensor comprises a photoelectric sensing device.

3. The apparatus of claim 1, wherein the controller is configured to increase the speed of the conveyor system in response to receiving the control signal.

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

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

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

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

8. 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.

9. 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.

10. 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.

11. 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.

12. 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.

13. 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.

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.

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 heating system is configured to heat the interior of the anneal unit to a temperature of up to about 250°

F.

16. 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.

17. 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.

18. 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.

19. 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.

20. 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.

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

22. 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.

23. 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.

24. The apparatus of claim 1, wherein the conveyor system comprises a flexible member configured to interact with a mold assembly, and wherein the flexible member is coupled to a motor configured to move the flexible member through the conveyor system.

25. 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.