Curing system and method of curing

Information

  • Patent Application
  • 20070189018
  • Publication Number
    20070189018
  • Date Filed
    August 17, 2006
    17 years ago
  • Date Published
    August 16, 2007
    16 years ago
Abstract
A curing device for curing an ink, varnish, adhesive, and/or adhesive with a lamination film on a web includes a curing housing and a control system. The curing housing includes a xenon light source and an outlet for light emitted by the light source. The control system is configured to calculate a dosage of light applied to the ink, varnish, adhesive, and/or adhesive with a lamination film. The control system is also configured to adjust or maintain the dosage of light applied to the ink, varnish, adhesive, and/or adhesive with a lamination film based on the calculated dosage of light.
Description

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.



FIG. 1 is a schematic view of a conventional cold mirror UV curing lamp housing;



FIG. 2 is a schematic view of the conventional cold mirror UV curing lamp housing of FIG. 1 illustrating how some of the light generated by a light source is reflected by a band-pass filter so as to leave the housing via a window, whereas other light generated by the light source passes through the band pass filter and into a heat sink;



FIG. 3 is a schematic view of a conventional hot mirror UV curing lamp housing in which some of the light generated by a light source is transmitted through a band-pass filter so as to leave the housing via a window, whereas other light generated by the light source is reflected by the band pass filter;



FIG. 4 is a schematic view of a cold mirror UV curing lamp housing of the type shown in FIGS. 1 and 2 but additionally including a second heat sink behind the web;



FIG. 5 is a schematic view of a hot mirror UV curing lamp housing of the type shown in FIG. 3 but additionally including a heat sink behind the web;



FIG. 6 is a schematic view of an electron beam curing housing;



FIG. 7 is a break-away, perspective view of the window outlet of a UV curing lamp housing such as one of the types shown in FIGS. 1, 2, and 4 and a web passing thereby, the view showing that the length of the light source is greater than the width of the web;



FIG. 8 is a schematic view of a curing device that includes a curing housing such as one of the types shown in FIGS. 1-6 and a control system; and



FIG. 9 is a block diagram that depicts an embodiment of a control method according to the present invention.


Claims
  • 1. A curing device for curing an ink, varnish, adhesive, and/or adhesive with a lamination film on a web, the curing device comprising: a curing housing comprising: a xenon lamp that is configured to emit light; andan outlet for light emitted by the xenon lamp; anda control system configured to: calculate a dosage of light applied to an ink, varnish, adhesive, and/or adhesive with a lamination film on a web; andadjust or maintain the dosage of light applied to the ink, varnish, adhesive, and/or adhesive with a lamination film on the web based on the calculated dosage of light.
  • 2. The curing device according to claim 1, wherein the xenon lamp is configured to emit light in response to a pulsed voltage applied to the xenon lamp.
  • 3. The curing device according to claim 2, wherein the control system is configured to adjust the dosage of light by adjusting the duration and/or magnitude of the pulsed voltage applied to the xenon lamp.
  • 4. The curing device according to claim 1, wherein the control system is further configured to: determine a speed of the web passing the outlet; anddetermine an intensity of the light passing through the outlet.
  • 5. The curing device according to claim 4, wherein the control system is configured to calculate the dosage of light based on the speed of the web and the intensity of the light.
  • 6. The curing device according to claim 4, wherein the control system is configured to adjust the dosage of light by adjusting the intensity of the light and/or the speed of the web.
  • 7. The curing device according to claim 1, wherein the control system comprises at least one radiometer that is configured to measure the intensity of the light.
  • 8. The curing device according to claim 1, wherein the control system comprises at least one speedometer that is configured to measure the speed of the web passing the outlet.
  • 9. The curing device according to claim 1, wherein the control system comprises at least one temperature sensor.
  • 10. The curing device according to claim 9, wherein the at least one temperature sensor is configured to measure a temperature of the web, andwherein, if the temperature of the web exceeds a predetermined value, the control system is configured do at least one of the following: (i) activate an alarm; (ii) increase the speed of the web; (iii) decrease the intensity of the light emitted by the housing; (iv) prevent the light from exiting the housing; and/or (v) deactivate the curing housing.
  • 11. The curing device according to claim 1, wherein the curing housing further comprises a filter configured to reflect or transmit light that has wavelength(s) that fall within a predetermined wavelength range toward the outlet
  • 12. The curing device according to claim 10, wherein the filter is configured to let UV light pass therethrough.
  • 13. The curing device according to claim 1, further comprising: an alarm that is configured to alert a technician if the calculated dosage of light differs from a predetermined dosage or is outside a predetermined dosage range.
  • 14. The curing device according to claim 1, wherein the predetermined dosage and predetermined dosage range are based on the type and thickness of the ink, varnish, adhesive, and/or adhesive with a lamination film applied to the web.
  • 15. The curing device according to claim 1, further comprising: a heat sink,wherein the web is positioned between the curing housing outlet and the heat sink.
  • 16. A curing device for curing an ink, varnish, adhesive, and/or adhesive with a lamination film on a web, the curing device comprising: a curing housing comprising: a xenon lamp that is configured to emit light; andan outlet for light emitted by the light source;means for calculating a dosage of light applied to an ink, varnish, adhesive, and/or adhesive with a lamination film on a web via the outlet; andmeans for adjusting or maintaining the dosage of light applied to the ink, varnish, adhesive, and/or adhesive with a lamination film on the web based on the calculated dosage of light.
  • 17. The curing device according to claim 16, wherein the xenon lamp is configured to emit light in response to a pulsed voltage applied to the xenon lamp.
  • 18. The curing device according to claim 17, wherein the means for adjusting or maintaining the dosage of light is configured to adjust the dosage of light by adjusting the duration and/or magnitude of the pulsed voltage applied to the xenon lamp.
  • 19. The curing device according to claim 16, further comprising: means for determining a speed of the web passing the outlet; andmeans for determining an intensity of the light passing through the outlet.
  • 20. The curing device according to claim 19, wherein the means for calculating a dosage of light applied to the web is configured to calculate the dosage of light based on the speed of the web and the intensity of the light.
  • 21. The curing device according to claim 19, wherein the means for determining the speed of a web passing the outlet comprises at least one speedometer.
  • 22. The curing device according to claim 16, wherein the means for adjusting the dosage of light is configured to adjust the dosage of light by adjusting the intensity of the light and/or the speed of the web.
  • 23. The curing device according to claim 16, further comprising: at least one temperature sensor configured to measure a temperature of the web; andcontrol means,wherein, if the temperature of the web exceeds a predetermined value, the control means is configured to do at least one of the following: (i) activate an alarm; (ii) increase the speed of the web; (iii) decrease the intensity of the light emitted by the housing; (iv) prevent the light from exiting the housing; and/or (v) deactivate the curing housing.
  • 24. The curing device according to claim 19, wherein the means for determining an intensity of the light passing through the outlet comprises at least one radiometer.
  • 25. The curing device according to claim 24, wherein at least one of the radiometers is aligned with the outlet at a position in which the web is not configured to pass between the radiometer and the lamp.
  • 26. The curing device according to claim 16, further comprising: a temperature sensor configured to monitor a temperature of the web passing the outlet.
  • 27. The curing device according to claim 16, wherein the curing housing further comprises a filter configured to reflect or transmit light that has wavelength(s) that fall within a predetermined wavelength range toward the outlet
  • 28. The curing device according to claim 27, wherein the filter is configured to enable UV light to pass therethrough.
  • 29. The curing device according to claim 16, further comprising: an alarm that is configured to alert a technician if the calculated dosage of light differs from a predetermined dosage or is outside a predetermined dosage range.
  • 30. The curing device according to claim 29, wherein the predetermined dosage and predetermined dosage range are based on the type and thickness of the ink, varnish, adhesive, and/or adhesive with a lamination film applied to the web.
  • 31. The curing device according to claim 16, further comprising: a heat sink,wherein the web is positioned between the curing housing outlet and the heat sink.
  • 32. A method comprising the steps of: (A) emitting light using a curing housing;(B) determining a dosage of the light emitted by the curing housing;(C) comparing the determined dosage of light to a predetermined dosage or predetermined dosage range; and(D) performing one of the following steps (i) and (ii): (i) if the determined dosage of light is compared in step (C) to a predetermined dosage, performing one of the following steps (a) and (b): (a) adjusting an intensity of the light emitted by the curing housing and/or a speed of a web on which an ink, varnish, adhesive, and/or adhesive with a lamination film will be provided if the determined dosage of light differs from the predetermined dosage; or(b) maintaining the speed of the web and the intensity of the light emitted by the curing housing, if the determined dosage of light is substantially the same as the predetermined dosage; or(ii) if the determined dosage of light is compared in step (C) to a predetermined dosage range, performing one of the following steps (c) and (d): (c) adjusting the intensity of the light emitted by the curing housing and/or the speed of the web if the determined dosage of light is outside the predetermined dosage range; or(d) maintaining the speed of the web and the intensity of the light emitted by the curing housing, if the determined dosage of light is within the predetermined dosage range.
  • 33. The method according to claim 32, further comprising the step of: (E) cyclically repeating steps (B)-(D).
  • 34. The method according to claim 33, wherein steps (B), (C), and (D) are initially performed by a technician located at the curing housing.
  • 35. The method according to claim 34, wherein steps (B), (C), and (D) are subsequently performed by a controller that is electrically connected to the curing housing.
  • 36. The method according to claim 35, wherein the controller is electrically connected to the curing housing via an internet connection.
  • 37. The method according to claim 32, further comprising the steps of: determining an intensity of the light emitted by the curing housing using one or more radiometers; anddetermining the speed at which the web is moving relative to the curing housing.
  • 38. The method according to claim 37, wherein the step of (B) determining a dosage of the light emitted by the curing housing uses the determined intensity of the light emitted by the curing housing and the determined speed at which the web is moving.
  • 39. The method according to claim 32, wherein before the step of (A) emitting light using a curing housing, the method further comprises the steps of: (A1) emitting light using a calibrated light source; and(A2) determining an intensity of the light emitted by the calibrated light source using one or more radiometers.
  • 40. The method according to claim 39 further comprising the steps of: (A3) ascertaining whether any of the radiometers is malfunctioning by comparing the intensity of the light emitted by the calibrated light source as determined by each of the radiometers to a predetermined, calibrated light intensity or to a predetermined, calibrated light intensity range;(A4) if any of the radiometers is ascertained to be malfunctioning, either: (i) removing the malfunctioning radiometer(s); or(ii) replacing the malfunctioning radiometer(s) and repeating steps (A2) and (A3); and(A5) eliminating the light emitted by the calibrated light source.
  • 41. The method according to claim 39, wherein the step of (A)(1) emitting light using a calibrated light source, comprises the step of: positioning the calibrated light source in a predetermined location relative to the curing housing and/or the one or more radiometers.
  • 42. The method according to claim 32, wherein the steps of (D)(i)(a) and/or (D)(ii)(c) adjusting the intensity of the light emitted by the curing housing, comprises the step of: eliminating the light emitted by the curing housing.
  • 43. The method according to claim 32, wherein the steps of (D)(i)(a) and/or (D)(ii)(c) adjusting the speed of the web, comprises the step of: stopping the web.
  • 44. The method according to claim 32, wherein before the step of (A) emitting light using a curing housing, the method further comprises the step of: ascertaining the predetermined dosage or predetermined dosage range.
  • 45. The method according to claim 44, wherein the step of ascertaining the predetermined dosage or predetermined dosage range comprises one or more of the following steps: scanning a barcode and obtaining from a lookup table dosage information corresponding to the barcode;reading information stored on a radio frequency identification chip; and/orreceiving dosage information from a remote location.
Continuation in Parts (1)
Number Date Country
Parent 11355195 Feb 2006 US
Child 11505493 US