PATENTSCOPE will be unavailable a few hours for maintenance reason on Tuesday 19.11.2019 at 4:00 PM CET
Search International and National Patent Collections
Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (WO2010077132) UVLED APPARATUS FOR CURING GLASS-FIBER COATINGS
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

CLAIMS

1. An apparatus (10,20,30,40,50,60,70) for curing a coating upon a glass fiber, the apparatus (10,20,30,40,50,60,70) comprising: one or more UVLED-mirror pairs, each UVLED-mirror pair comprising (/) a UVLED (11) for emitting electromagnetic radiation and (//) a mirror (16,46) for reflecting electromagnetic radiation; wherein said UVLED (11) and said mirror (16,46) of said one or more UVLED-mirror pairs define therebetween a curing space (15) for the passage of a coated glass fiber between said UVLED (11)and said mirror (16,46); and wherein said mirror (16,46) is positioned opposite said UVLED (11) of said one or more

UVLED-mirror pairs to reflect the electromagnetic radiation emitted from said UVLED (11) into the curing space (15).

2. An apparatus (10,20,30,40,50,60,70) according to Claim 1 , comprising a plurality of UVLED-mirror pairs arranged in such a manner that the curing space (15) of each of the plurality of UVLED-mirror pairs is aligned in longitudinal direction to form the curing space (15) for the passage of the coated glass fiber through the plurality of UVLED-mirror pairs

3. An apparatus(10,20,30,40,50,60,70) according to Claim 2, wherein the curing space (15) defines a central axis (14); and each of said UVLED-mirror pairs are configured in two or more distinct planes that are substantially perpendicular to the central axis (14).

4. An apparatus (10,20,30,40,50,60,70) according to Claim 3, wherein said UVLED-mirror pairs are helically configured around the central axis (14) of the curing space (15).

5. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, comprising at least two UVLED-mirror pairs and wherein at least two of said UVLEDs (11) emit electromagnetic radiation at different output intensities.

6. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, comprising at least two UVLED-mirror pairs and having a dark space between at least two of said UVLEDs (11).

7. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, wherein substantially all of the electromagnetic radiation emitted by each said UVLED (11) has wavelengths of between about 200 nanometers and 600 nanometers.

8. An apparatus(10,20,30,40,50,60,70) according to any one of the preceding claims, wherein at least 90 percent of the electromagnetic radiation emitted by each said UVLED (11) has wavelengths of between about 250 nanometers and 400 nanometers.

9. An apparatus(10,20,30,40,50,60,70) according to any one of the preceding claims, wherein at least 80 percent of the electromagnetic radiation emitted by each said UVLED (11) has wavelengths of between about 300 nanometers and 450 nanometers.

10. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, wherein at least 80 percent of the electromagnetic radiation emitted by each said UVLED (11) has wavelengths of between about 375 nanometers and 425 nanometers.

11. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, wherein each said UVLED (11) emits electromagnetic radiation of wavelengths mostly between about 395 nanometers and 415 nanometers.

12. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, wherein at least 80 percent of the electromagnetic radiation emitted by each said UVLED (11) has wavelengths within a 30-nanometer range.

13. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, wherein at least one said UVLED (11) has a power output of at least about 30 watts.

14. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, wherein each said UVLED (11) has a power output of at least about 30 watts.

15., An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, wherein at least one UVLED-mirror pair comprises a plurality of UVLEDs (11).

16. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, wherein at least one of said UVLED-mirror pairs comprises a concave mirror.

17. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, wherein at least one of said UVLED-mirror pairs comprises a parabolic mirror, a spherical mirror, and/or a cylindrical mirror.

18. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, wherein at least one of said UVLED-mirror pairs comprises a plurality of mirrors (16,46).

19. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, comprising a heat sink (12) for dissipating heat from at least one said UVLED (11).

20. An apparatus (10,20,30,40,50,60,70) according to Claim 19, wherein said heat sink (12) comprises a heat exchanger that employs a liquid coolant.

21. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, comprising a heat sink (12) for dissipating heat from each said UVLED (11).

22. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, comprising a reflector (17) for focusing UV radiation toward the coated glass fiber, wherein said reflector (17) is attached to at least one said UVLED (11).

23. An apparatus (10,20,30,40,50,60,70) according to Claim 22, wherein said reflector (17) has the shape of a rotated teardrop curve.

24. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, comprising a lens for focusing UV radiation toward the coated glass fiber, said lens attached to at least one said UVLED (11).

25. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, comprising a control circuit for controlling the UV radiation output from at least one said UVLED (H).

26. An apparatus (10,20,30,40,50,60,70) according to Claim 25, wherein said control circuit adjusts the intensity of electromagnetic radiation output from at least one said UVLED (11) in response to a change in the speed at which the coated glass fiber passes through the apparatus (10,20,30,40,50,60,70).

27. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, wherein at least one said UVLED-mirror pair comprises a plurality of UVLEDs (11).

28. An apparatus (10,20,30,40,50,60,70) according to any one of the preceding claims, wherein at least one said UVLED-mirror pair comprises a plurality of mirrors (16,46) positioned opposite said UVLED (11) to reflect the electromagnetic radiation emitted from said UVLED (11) into the curing space (15).

29. An apparatus (10,20,30,40,50,60,70) for curing a coated glass fiber, comprising: a substantially cylindrical cavity having an elliptical cross-section (50,65), said cavity having a reflective inner surface; and one or more UVLEDs (11 , 64) positioned within said cavity; wherein said cavity defines a first line focus (51,61)and a second line focus(52,62), said second line focus (52,62) defining a curing axis.

30. An apparatus (10,20,30,40,50,60,70) according to Claim 29, wherein said UVLEDs (64) are positioned along said first line focus (51 ,61) to emit UV radiation in the direction of said curing axis.

31. An apparatus (10,20,30,40,50,60,70) according to Claim 29, wherein at least one of said UVLEDs (64) includes a lens for focusing UV radiation, said lens having a focus along said first line focus (51 ,61).

32. An apparatus (10,20,30,40,50,60,70) for curing a coating upon a glass fiber, the apparatus (10,20,30,40,50,60,70) comprising a three-dimensional helical array of UVLEDs, said three-dimensional helical array of UVLEDs (11) defining a glass-fiber curing space having a central axis, wherein each of said UVLEDs (11 ,64) emits electromagnetic radiation toward the glass-fiber curing space.

33. An apparatus (10,20,30,40,50,60,70) according to Claim 32, comprising a plurality of three-dimensional helical arrays of UVLEDs (11 ,64), wherein each of said UVLEDs (11 ,64) emits electromagnetic radiation toward the glass-fiber curing space.

34. An apparatus (10,20,30,40,50,60,70) according to Claim 33, wherein each of said three-dimensional helical arrays of UVLEDs (11 ,64) has the same chirality.

35. An apparatus (10,20,30,40,50,60,70) according to Claim 33, wherein at least two of said three-dimensional helical arrays of UVLEDs (11 ,64) have opposite chirality.

36. An apparatus (10,20,30,40,50,60,70) according to Claim 32, comprising one or more mirrors (16,46) for reflecting electromagnetic radiation toward the glass-fiber curing space.

37. A method for curing a coating on a glass fiber, comprising: emitting UV radiation from one or more sources of electromagnetic radiation toward a curing space; transmitting a portion of the emitted UV radiation entirely through the curing space; reflecting toward the curing space at least some of the UV radiation transmitted entirely through the curing space; and passing through the curing space a glass fiber having an incompletely cured coating to effect the absorption of both emitted and reflected UV radiation.

38. The method according to Claim 37, wherein the step of emitting UV radiation comprises emitting UV radiation from one or more UVLEDs.

39. The method according to Claim 37, wherein the step of passing the glass fiber through the curing space substantially cures the coating on the glass fiber.

40. The method according to Claim 37, wherein the step of reflecting at least some of the UV radiation comprises reflecting with a mirror at least some of the UV radiation toward the curing space.

41. The method according to Claim 37, wherein the step of reflecting at least some of the UV radiation comprises focusing with a concave mirror at least some of the UV radiation toward the glass fiber having an incompletely cured coating.

42. The method according to Claim 40, wherein focusing at least some of the UV radiation toward the glass fiber is achieved with a parabolic mirror, a spherical mirror, and/or a cylindrical mirror.

43. The method according to Claim 37, wherein the step of emitting UV radiation comprises focusing with a lens at least some of the emitted UV radiation.

44. The method according to Claim 43, wherein the step of passing a glass fiber through the curing space comprises passing the glass fiber through the focus of the lens.