Web material inspection system

• US 4,951,223 A
• Filed: 11/27/1989
• Issued: 08/21/1990
• Est. Priority Date: 03/28/1989
• Status: Expired due to Fees

• Current Assignee: Roll Systems, Inc. (Demco SRL)
• Original Assignee: H. W. Crowley, Wales R. Langdon
• Inventors: Crowley, H. W., Wales, R. Langdon
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US07/441,174
• Time in Patent Office: 267 Days
• Field of Search: 364/507, 358/101, 358/106, 358/107, 250/559-563, 101/181, 101/491
• US Class Current: 702/40
• CPC Class Codes: G01N 2021/8864 Mapping zones of defects
• CPC Class Codes: G01N 21/89 in moving material, e.g. running paper or textiles G01N21/90, G01N21/91, G01N21/94 take precedence
• CPC Class Codes: G01N 33/346 paper sheets

Abstract

A system for inspecting and characterizing continuous web material such as may be wound into a roll. This system includes a recording storage means for providing a duplicate image of the web material and a device for reviewing the recording storage means image to detect a predetermined characterisitc of the image such as a defect therein. The position along the image is detected and a switch is responsive to both the content information and position information to record an indicia of image position corresponding to detection of the predetermined characteristic.

Claims

1. A system for inspecting and characterizing a continuous web material such as may lie wound into a roll, said system comprising recording storage means for providing a duplicate image of the web material, means for reviewing the recording storage means image to detect a predetermined characteristic of the image, means for determining a position along said image as the image is reviewed, and means responsive to the predetermined characteristic of the image being detected to record an indicia of image position corresponding to detection of said predetermined characteristic.

2. A system as described in claim 1 wherein said recording storage means includes a video camera for recording the image on a video tape.

3. A system as described in claim 1 including camera means disposed adjacent said web material for capturing the image on a continuous basis and coupling to said recording storage means.

4. A system as described in claim 3 wherein said recording storage means comprises optical means.

5. A system as described in claim 4 wherein said optical means comprises an optical scanner and film for recording the image.

6. A system as described in claim 1 wherein said recording storage means includes image detection means and memory storage means for the detected image.

7. A system as described in claim 6 wherein said storage means comprises magnetic storage means.

8. A system as described in claim 6 wherein said storage means includes digital storage means.

9. A system as described in claim 6 wherein said storage means includes analog storage means.

10. A system as described in claim 1 wherein said means for reviewing comprises means for detecting a defect in said image.

11. A system as described in claim 10 wherein the duplicate image is separated into frames corresponding to web material frames each having a position marker associated therewith.

12. A system as described in claim 11 wherein said means for determining the position along said image includes means for counting markers to determining position.

13. A system as described in claim 1 wherein said means for reviewing comprises means for detecting a defect in the image including means for establishing a reference image and means for comparing the detected image with the desired reference image to detect defects.

14. A system as described in claim 1 wherein said means to record an indicia of image position includes a recording medium and means responsive to detection of said predetermined characteristic to pass the corresponding indicia to said recording medium.

15. A system as described in claim 14 wherein said means to pass includes switch means.

16. A system as described in claim 15 wherein said predetermined characteristic is a defect in the web material.

17. A method for inspecting and characterizing continuous product including the steps of recording a duplicate image of the product in a recording storage means, reviewing the recording storage means image to detect a predetermined characteristic of the image, determining a position along the image as the image is reviewed and recording an indicia of image position upon detection of said predetermined characteristic of the image and corresponding to detection of said predetermined characteristic.

18. A method as set forth in claim 17 wherein the step of duplicating the image includes video recording the image.

19. A method as set forth in claim 17 wherein the step of duplicating the image includes optically storing the image.

20. A method as set forth in claim 17 wherein the step of reviewing includes detecting a defect in the image.

21. A method as set forth in claim 17 wherein the step of determining the position includes counting markers on the product to determine position.

22. A method as set forth in claim 17 wherein the step of reviewing the image includes establishing a reference image and comparing the detected image with the reference image.

23. A system for inspecting and characterizing web material comprising means for storing a duplicate image of indicia of the web material, means for reviewing the stored image to detect a predetermined characteristic thereof, means for determining positions along the image as the image is reviewed, and means responsive to the predetermined characteristic of the image that is detected to record and indicia of image position corresponding to detection of said predetermined characteristic.

24. A system as described in claim 23 wherein said means for reviewing comprises means for detecting a defect in the image including means for establishing a reference image and means for comprising the detected image with the desired reference image to detect defects.

25. A system as described in claim 23 wherein said means to record an indicia of image position includes a recording medium and means responsive to detection of said predetermined characteristic to pass the corresponding indicia to said recording medium.

26. A system as described in claim 23 including camera means disposed adjacent to said web material for capturing the image on a continuous basis and coupling to said recording storage means.

27. A system as described in claim 26 wherein said recording storage means comprises optical means.

28. A system as described in claim 27 wherein said optical means comprises an optical scanner and film for recording the image.

29. A system as described in claim 23 wherein said recording storage means includes image detection means and memory storage means for the detected image.