Eyeglass lens and mold spin coater

• US 5,514,214 A
• Filed: 09/20/1993
• Issued: 05/07/1996
• Est. Priority Date: 09/20/1993
• Status: Expired due to Fees

• Current Assignee: Q 2100 Incorporated
• Original Assignee: Q2100, Inc.
• Inventors: Buazza, Omar M., Joel, Larry H.
• Primary Examiner(s): EDWARDS, LAURA ESTELLE
• Application Number:
  US08/123,886
• Time in Patent Office: 960 Days
• Field of Search: 118/52, 118/56, 118/58, 118/64, 118/66, 118/300, 118/320, 118/500, 118/501, 118/620, 118/642, 118/686, 118/712, 425/174.4, 425/808, 427/553, 427/133, 427/164
• US Class Current: 118/52
• CPC Class Codes: B05D 1/005 Spin coating
• CPC Class Codes: B05D 1/02 performed by spraying
• CPC Class Codes: B05D 3/067 Curing or cross-linking the coating
• CPC Class Codes: B29C 2035/0827 using UV radiation
• CPC Class Codes: B29C 35/08 by wave energy or particle radiation B29C64/00, B29C71/04 take precedence
• CPC Class Codes: B29C 41/08 Coating a former, core or other substrate by spraying or fluidisation, e.g. spraying powder spray-up of reinforcing fibres B29C70/305
• CPC Class Codes: B29D 11/00865 Applying coatings; tinting; colouring printing, marking or copying processes B41M; identification in general G09F3/00; producing decorative effects in general B44C; positioning or marking of lenses B24B13/0055
• CPC Class Codes: B29K 2105/0002 monomers or prepolymers
• CPC Class Codes: B29K 2995/007 Hardness
• CPC Class Codes: B29K 2995/0087 Wear resistance
• CPC Class Codes: Y10S 425/808 Lens mold

Abstract

Hard substrates such as ophthalmic lenses or molds are coated with a UV curable monomer which is polymerized to construct a scratch resistant coating on a surface of the lens. The present invention is directed to an apparatus for and method of applying the UV curable monomer to the surface of the ophthalmic lens or mold. Polymerization of the monomer occurs by radiation of UV light while the lens is encased in a curing chamber. The spin coater of the present invention has the following advantages: Excess monomer is collected in a dish away from UV exposure and is readily disposed of. The substrate is revolved at a high rate of speed during the application of the coating to achieve a uniform coating of monomer. Only the holder and substrate are moved to the curing chamber minimizing the items exposed to UV light. The UV light is electrodeless, it has a standby mode and operates cyclically during use so as to prolong its life and to allow a greater degree of control over extent of polymerization. Operation of the apparatus occurs automatically and can be performed by using pneumatic as well as electronic circuits.

Claims

1. An apparatus for applying a coating on an eyeglass lens, comprising:

an eyeglass lens holder constructed to revolve during use;

a dispenser for applying a coating material to a lens positioned on the holder, the dispenser being located in a coating application chamber;

an elevation component connected to the holder, the elevation component being constructed to raise the holder from the coating application chamber to a curing chamber during use, and to lower the holder from the curing chamber to the coating application chamber during use; and

wherein the curing chamber comprises an ultraviolet lamp constructed to direct ultraviolet light towards the coating material on the eyeglass lens during use, a bottom wall with an opening, and a covering for the opening that is constructed to be normally closed, to open to allow-the holder to pass through the opening during use, and to close after the holder has passed through the opening during use.

2. The apparatus of claim 1, wherein the eyeglass lens is at least one of an ophthalmic lens and an optic material.

3. The apparatus of claim 1, wherein the eyeglass lens holder revolves about a vertical axis during use.

4. The apparatus of claim 1, wherein the dispenser applies a predetermined amount of coating material onto a lens during use.

5. The apparatus of claim 1, wherein the coating application chamber includes a spray application dish for collecting excess coating material during use.

6. The apparatus of claim 1, wherein the elevation component is constructed to operate automatically during use, the elevation component being signaled to operate by a first signal received after the coating material has been applied, and by a second signal received after the coating material has been cured.

7. The apparatus of claim 6, wherein the automatic operation functions by a pneumatic circuit.

8. The apparatus of claim 6, wherein automatic operation functions by an electrical circuit.

9. The apparatus of claim 1, wherein the revolving of the eyeglass lens holder causes the coating material to radially disperse during use, thereby forming a substantially even coating.

10. The apparatus of claim 1, wherein movement of the covering is automatically activated by a pneumatic circuit during use.

11. The apparatus of claim 1, wherein the curing chamber comprises an air distribution system for distributing filtered air throughout the curing chamber during use.

12. The apparatus of claim 1, wherein the ultraviolet lamp is electrodeless and emits ultraviolet light cyclically during use.

13. The apparatus of claim 1, wherein movement of the covering is automatically activated by an electrical circuit during use.

14. An apparatus for curing a coating on an eyeglass lens, comprising:

an eyeglass lens holder constructed to revolve during use;

a dispenser for applying ultraviolet curable coating material to the lens positioned on the holder, the dispenser being located in a coating application chamber;

an elevation component connected to the holder, the elevation component being constructed to raise the holder from the coating application chamber to a curing chamber during use, and to lower the holder from the curing chamber to the coating application chamber during use; and

wherein the curing chamber comprises an ultraviolet lamp constructed to direct ultraviolet light towards the coating material on the eyeglass lens during use, a bottom wall with an opening, a covering for the opening that is constructed to be normally closed, to open to allow the holder to pass through the opening during use, and to close after the holder has passed through the opening during use, and an air distribution system for passing filtered air throughout the curing chamber during use.

15. The apparatus of claim 14, wherein the revolving of the eyeglass lens holder occurs about a vertical axis and causes the ultraviolet curable coating material to radially disperse, forming a substantially even coating on a surface of the eyeglass lens.

16. The apparatus of claim 14, wherein the elevation component operates automatically during use, and wherein the elevation component is signaled to operate by a first signal received after the ultraviolet curable coating material has been applied, and by a second signal received after the coating material has been cured.

17. The apparatus of claim 16 wherein automatic operation functions by a pneumatic circuit during use.

18. The apparatus of claim 16 wherein automatic operation functions by an electrical circuit during use.

19. The apparatus of claim 14, wherein the dispenser is constructed to apply ultraviolet curable coating material during use to the lens in a pre-coat step and a coat step.

20. The apparatus of claim 14, wherein the ultraviolet lamp is electrodeless and has a standby mode during which ultraviolet light is not emitted.

21. An apparatus for applying a coating on an eyeglass mold, comprising:

an eyeglass mold holder constructed to revolve during use;

a dispenser for applying a coating material to a mold positioned on the holder, the dispenser being located in a coating application chamber;

an elevation component connected to the holder, the elevation component constructed to raise the holder from the coating application chamber to a curing chamber during use, and to lower the holder from the curing chamber to the coating application chamber during use; and

wherein the curing chamber comprises an ultraviolet lamp constructed to direct ultraviolet light towards the coating material on the eyeglass mold during use, a bottom wall with an opening, and a covering for the opening that is constructed to be normally closed, to open to allow the holder to pass through the opening during use, and to close after the holder has passed through the opening during use.

22. The apparatus of claim 21, wherein the eyeglass mold is at least one of a mold for an ophthalmic lens, and an optic material.

23. The apparatus of claim 21, wherein the eyeglass mold holder revolves about a vertical axis during use.

24. The apparatus of claim 21, wherein the dispenser applies a predetermined amount of coating material onto a mold during use.

25. The apparatus of claim 21, wherein the coating application chamber includes a spray application dish for collecting excess coating material during use.

26. The apparatus of claim 21, wherein the elevation component constructed to operate automatically during use, the elevation component being signaled to operate by a first signal received after the coating material has been applied, and by a second signal received after the coating material has been cured.

27. The apparatus of claim 26, wherein automatic operation functions by a pneumatic circuit.

28. The apparatus of claim 26, wherein automatic operation functions by an electrical circuit.

29. The apparatus of claim 21, wherein the revolving of the eyeglass mold holder causes the coating material to radially disperse during use, thereby forming a substantially even coating.

30. The apparatus of claim 21, wherein movement of the covering is automatically activated by a pneumatic circuit during use.

31. The apparatus of claim 21, wherein movement of the covering is automatically activated by an electrical circuit during use.

32. The apparatus of claim 21, wherein the curing chamber comprises an air distribution system for distributing filtered air throughout the curing, chamber during use.

33. The apparatus of claim 21, wherein the ultraviolet lamp is electrodeless and emits ultraviolet light cyclically during use.

34. An apparatus for curing a coating on an eyeglass mold, comprising:

an eyeglass mold holder constructed to revolve during use;

a dispenser for applying ultraviolet curable coating material to the mold positioned on the holder, the dispenser being located in a coating application chamber;

an elevation component connected to the holder, the elevation component constructed to raise the holder from the coating application chamber to a curing chamber during use, and to lower the holder from the curing chamber to the coating application chamber during use; and

wherein the curing chamber comprises an ultraviolet lamp constructed to direct ultraviolet light towards the coating material on the eyeglass mold during use, a bottom wall with an opening, a covering for the opening that is constructed to be normally closed, to open to allow the holder to pass through the opening during use, and to close after the holder has passed through the opening during use, and an air distribution system for passing filtered air throughout the curing chamber during use.

35. The apparatus of claim 34, wherein the revolving of the eyeglass mold holder occurs about a vertical axis and causes the ultraviolet curable coating material to radially disperse, forming a substantially even coating on a surface of the eyeglass mold.

36. The apparatus of claim 34, wherein the elevation component operates automatically during use, and wherein the elevation component is signaled to operate by a first signal received after the ultraviolet curable coating material has been applied, and by a second signal received after the coating material has been cured.

37. The apparatus of claim 36, wherein automatic operation functions by a pneumatic circuit during use.

38. The apparatus of claim 36, wherein automatic operation functions by an electrical circuit during use.

39. The apparatus of claim 34, wherein the dispenser is constructed to apply ultraviolet curable coating material during use to the mold in a pre-coat step and a coat step.

40. The apparatus of claim 34, wherein the ultraviolet lamp is electrodeless and has a standby mode during which ultraviolet light is not emitted.