Apparatus and method for inspecting a flexible glass ribbon

Patent metadata

Field	Value
Publication number	US-9683945-B2
Application number	US-201314403694-A
Country	US
Kind code	B2
Filing date	May 23, 2013
Priority date	May 30, 2012
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

An apparatus ( 10 ) is provided for inspecting a flexible glass ribbon. In one example, the apparatus includes at least one storage roll ( 16 ) for storing a length of the flexible glass ribbon ( 12 ). In another example, the apparatus further includes an inspection device ( 50 ). In yet another example, the inspection device can inspect a characteristic of an unrolled portion ( 28 ) of the flexible glass ribbon ( 12 ) spanning along a travel path ( 14 ) of the flexible glass ribbon.

First claim

What is claimed is:

1. An apparatus for inspecting a flexible glass ribbon, the apparatus comprising:
at least one storage roll configured to store a length of the flexible glass ribbon;
a plurality of rollers with a first roller of the plurality of rollers being adjustable to be moved closer to or farther away from a second roller of the plurality of rollers to adjust a tension in an inspection region of an unrolled portion of the flexible glass ribbon spanning between the first roller and the second roller; and
an optical device positioned and configured to inspect a characteristic of a glass portion of the unrolled portion of the flexible glass ribbon within the inspection region between the first roller and the second roller.

2. The apparatus of claim 1 , wherein the plurality of rollers are configured to stabilize the inspection region of the unrolled portion of the flexible glass ribbon.

3. The apparatus of claim 1 , wherein the optical device includes at least one camera configured to inspect the characteristic of the glass portion of the unrolled portion of the flexible glass ribbon.

4. The apparatus of claim 3 , wherein the at least one camera comprises a camera array configured to inspect the characteristic along a width of the unrolled portion of the flexible glass ribbon extending transverse to the travel path.

5. The apparatus of claim 3 , further comprising a polarized light source configured to operate with the at least one camera to inspect the characteristic comprising a stress characteristic of the glass portion of the unrolled portion of the flexible glass ribbon.

6. The apparatus of claim 3 , further comprising an elongated member at least extending in a direction that is substantially transverse to the travel path, wherein the elongated member is configured to extend at least partially along a width of the unrolled portion of the flexible glass ribbon extending transverse to the travel path, and wherein the elongated member is configured to be observed by the camera to inspect the characteristic comprising a warp characteristic along the width of the unrolled portion.

7. The apparatus of claim 1 , wherein the at least one storage roll includes a first storage roll configured to store a first length of the flexible glass ribbon and a second storage roll configured to store a second length of the flexible glass ribbon.

8. The apparatus of claim 1 , wherein the optical device is configured to measure the characteristic comprising a stress characteristic, thickness, or warp, of the glass portion in the inspection region of the unrolled portion of the flexible glass ribbon.

9. A method of inspecting a characteristic of a glass portion of a flexible glass ribbon, the method comprising the steps of:
(I) providing a first storage roll storing a first length of the flexible glass ribbon; and
(II) inspecting a characteristic of the glass portion of an unrolled portion of the flexible glass ribbon spanning along a travel path of the flexible glass ribbon;
(III) stabilizing an inspection region of the unrolled portion of the flexible glass ribbon with a plurality of rollers while inspecting the characteristic within the inspection region of the unrolled portion of the flexible glass ribbon; and
(IV) adjusting at least one of the plurality of rollers to adjust a tension of the unrolled portion of the flexible glass ribbon in the inspection region, wherein the step of adjusting includes moving a first roller of the plurality of rollers closer to or farther away from a second roller of the plurality of rollers to adjust the tension in the inspection region, wherein the inspection region spans between the first roller and the second roller.

10. The method of claim 9 , wherein step (II) includes inspecting the characteristic comprising a stress characteristic, thickness, or warp, of the glass portion of the unrolled portion of the flexible glass ribbon.

11. The method of claim 9 , wherein step (II) includes operating an optical device to inspect the characteristic of the glass portion of the unrolled portion of the flexible glass ribbon.

12. The method of claim 9 , wherein step (II) includes exposing the glass portion of the unrolled portion of the flexible glass ribbon with polarized light while at least one camera inspects the characteristic comprising a stress characteristic of the glass portion of the unrolled portion of the flexible glass ribbon.

13. The method of claim 9 , wherein step (II) includes inspecting an elongated member relative to the unrolled portion of the flexible glass ribbon with at least one camera to inspect a warpage of the glass portion of the flexible glass ribbon.

14. The method of claim 9 , wherein step (I) further provides a second storage roll storing a second length of the flexible glass ribbon, and wherein step (II) is carried out while the unrolled portion travels along the travel path from the first storage roll to the second storage roll.

15. A method of inspecting a characteristic of a flexible glass ribbon, the method comprising the steps of:
(I) providing a first storage roll storing a first length of the flexible glass ribbon;
(II) guiding an unrolled portion of the flexible glass ribbon with a plurality of rollers as the glass ribbon travels along a travel path of the flexible glass ribbon;
(III) moving a first roller of the plurality of rollers closer to or farther away from a second roller of the plurality of rollers to adjust a tension in an inspection region of the unrolled portion of the flexible glass ribbon, wherein the inspection region spans between the first roller and the second roller; and
(IV) inspecting a characteristic of a glass portion within the inspection region between the first roller and the second roller.

16. The method of claim 15 , wherein step (IV) includes inspecting the characteristic comprising a stress characteristic, thickness, or warp, of the glass portion of the unrolled portion of the flexible glass ribbon.

17. The method of claim 15 , wherein step (IV) includes operating an optical device to inspect the characteristic of the glass portion of the unrolled portion of the flexible glass ribbon.

18. The method of claim 15 , wherein step (IV) includes exposing the glass portion of the unrolled portion of the flexible glass ribbon with polarized light while at least one camera inspects the characteristic comprising a stress characteristic of the glass portion of the unrolled portion of the flexible glass ribbon.

19. The method of claim 15 , wherein step (IV) includes inspecting an elongated member relative to the unrolled portion of the flexible glass ribbon with at least one camera to inspect a warpage of the glass portion of the flexible glass ribbon.

20. The method of claim 15 , further comprising storing a second length of the flexible glass ribbon with a second storage roll, and step (IV) is carried out while the unrolled portion travels along the travel path from the first storage roll to the second storage roll.

Assignees

• Corning Inc

Inventors

• Kang Kiat Chyai
• Priestley Richard Sean

Classifications

• G01D21/02 Primary

  Measuring two or more variables by means not covered by a single other subclass · CPC title

• G01N21/84

  Systems specially adapted for particular applications · CPC title

• G01N21/896

  Optical defects in or on transparent materials, e.g. distortion, surface flaws {in conveyed flat sheet or rod (for other objects G01N21/958)} · CPC title

• G01B21/08

  for measuring thickness · CPC title

• G01L1/24 Primary

  by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis {using infrared, visible light, ultraviolet} · CPC title