Delaminating method and apparatus

• US 5,556,499 A
• Filed: 12/01/1994
• Issued: 09/17/1996
• Est. Priority Date: 12/01/1994
• Status: Expired due to Fees

• Current Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Original Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Inventors: Clough, Arthur H.
• Primary Examiner(s): Osele, Mark A.
• Application Number:
  US08/347,882
• Time in Patent Office: 656 Days
• Field of Search: 156/344, 156/584, 271/280, 271/281, 271/285, 384/419, 355/315
• US Class Current: 156/701
• CPC Class Codes: B29C 63/0013 Removing old coatings
• CPC Class Codes: B32B 2310/0843 using laser
• CPC Class Codes: B32B 38/10 Removing layers, or parts of layers, mechanically or chemically
• CPC Class Codes: G03F 7/343 Lamination or delamination methods or apparatus for photolitographic photosensitive material
• CPC Class Codes: Y10T 156/11 Methods of delaminating, per se; i.e. , separating at bonding face
• CPC Class Codes: Y10T 156/1174 Using roller for delamination [e.g., roller pairs operating at differing speeds or directions, etc.]
• CPC Class Codes: Y10T 156/19 Delaminating means
• CPC Class Codes: Y10T 156/195 Delaminating roller means

Abstract

Method and apparatus for peeling a layer from a laminate utilizing a peel rod about which the layer is guided during peeling. The peel rod is continuously supported along its length by a bearing sleeve having a longitudinal passage receiving the rod and in turn supported in a holder. The bearing sleeve has a longitudinal opening in its wall communicating with its longitudinal passage, and the edge of the opening forms a continuous scraping edge for scraping debris from the rod. A cleaning pad of SCOTCH BRITE material extends radially through the bearing to engage the rod. The peeling rod and bearing are made of low friction material such as a ceramic, and the rod is preferably driven by a motor.

Claims

1. Apparatus for peeling a layer from a laminate including in combination;

a rotatable peel rod having an arcuate surface engageable with a layer of a laminate to guide the layer as it is being peeled from the laminate, and a bearing receiving said rod and having an arcuate surface engageable with an arcuate surface of said rod, said arcuate surface of said bearing extending continuously along and between opposite ends of said rod to provide continuous bearing contact with said rod along a longitudinal direction of said rod.

2. Apparatus defined in claim 1 wherein said bearing has a longitudinally-extending edge positioned close to said arcuate surface of said rod for scraping debris from said rod.

3. Apparatus defined in claim 2 wherein said edge is integral with said bearing.

4. Apparatus defined in claim 2 further including cleaning means for removing debris from said arcuate surface of said rod.

5. Apparatus defined in claim 4 wherein said cleaning means includes a pad made of an open and non-woven web material, said pad is engageable with said arcuate surface of said rod for removing debris from said arcuate surface of said rod.

6. Apparatus defined in claim 5 wherein said pad includes fibers covered with abrasive material.

7. Apparatus defined in claim 4 further including a holder receiving and holding said bearing, said holder extends longitudinally of said bearing generally coextensive therewith and has an arcuate surface receiving said bearing, and means fixing said bearing to said holder against movement.

8. Apparatus defined in claim 1 wherein said arcuate surface of said rod has a radius of curvature less than the radius of curvature of said arcuate surface of the bearing such that in use a peel roll and laminate to be peeled will load said rod against said arcuate surface of said bearing.

9. Apparatus defined in claim 8 wherein said arcuate surface of said bearing extends arcuately along first and second generally oppositely positioned arcuate portions, said rod being engageable with said first arcuate portion while being spaced from said second portion, and wherein there is further included an elongated doctor blade positioned adjacent to said first arcuate portion in close proximity to said rod for scraping debris from said rod.

10. Apparatus defined in claim 9 wherein said bearing has an integral elongated edge at said first arcuate portion forming said doctor blade.

11. Apparatus defined in claim 1 including means for driving said rod in rotation.

12. Apparatus defined in claim 1 wherein both of said arcuate surfaces are formed of a ceramic having a low coefficient of friction.

13. Apparatus defined in claim 12 wherein said material includes ZIRCONIA.

14. An apparatus for peeling a take-away layer from a laminate, the apparatus including a rotatable peel rod and roll spaced and co-operable with each other to define a nip for receiving the laminate while the take-away layer moves about said peel rod;

the improvement comprising a bearing receiving said rod along a substantial longitudinal dimension of said rod, said rod having an arcuate surface engageable with said bearing along said longitudinal dimension, said bearing having an internal arcuate surface engageable with said arcuate surface of said rod, said arcuate surface of said bearing having a radius of curvature greater than the radius of curvature of said arcuate surface of said rod such that in use the laminate will urge said rod against said arcuate surface of said bearing.

15. Apparatus defined in claim 14 wherein said improvement further includes means for cleaning said arcuate surface of said rod.

16. Apparatus defined in claim 15 wherein said improvement further includes means for driving said rod in rotation.

17. Apparatus defined in claim 15 wherein said cleaning means includes an open and non-woven pad, said pad being engageable with said arcuate surface of said rod.

18. Apparatus defined in claim 17 wherein said pad includes fibers which are covered with abrasive material.

19. Apparatus defined in claim 16 wherein said bearing includes a scraper blade adjacent said arcuate surface of said rod.

20. Apparatus defined in claim 19 wherein said improvement further includes a holder having an arcuate receptacle receiving said bearing and extending along a major length of said bearing, and means fixing said bearing to said holder against movement.

21. Apparatus defined in claim 14 wherein said bearing extends transversely along a discontinuous arc such that an elongated opening is defined in a wall of said bearing exposing said rod where it cooperates with said roll to receive the laminate.

22. Apparatus defined in claim 21 wherein said bearing has a longitudinally-extending edge defining one side of said opening for scraping debris from the rod.

23. A method of peeling a layer from a laminate including the steps of:

peeling the layer about a rotatable peel rod, and continuously supporting the rod along a longitudinal dimension against a surface of a bearing as the layer is being peeled.

24. The method defined in claim 23 further including the step of cleaning the surface of the peel rod that is engaged by the layer and while the layer is being peeled from the laminate.

25. The method defined in claim 24 including the step of using an edge of the bearing to scrape debris from the peel rod.

26. The method defined in claim 25 including the step of removing with a pad comprising an open and non-woven web material debris from the surface of the rod engaged by the layer and as the peeling of the layer proceeds.

27. The method defined in claim 25 including the step of removing with a pad debris from the surface of the rod engaged by the layer and as the peeling of the layer proceeds.

28. The method defined in claim 24 including the step of while the peel rod is in rotation maintaining the speed or torque of said rod above a certain minimum.

29. The method defined in claim 23 applied to an image media laminate to remove a throw-away layer from the image media laminate.

30. Apparatus for peeling a layer from a laminate including in combination;

a rotatable peel rod having an arcuate surface engageable with a layer of a laminate to guide the layers as it is being peeled from the laminate, a doctor blade positioned closely to said peel rod and extending along the peel rod to scrape debris from the peel rod, and a pad engageable with the peel rod to remove debris from the peel rod.

31. Apparatus defined in claim 30 further including a bearing receiving the peel rod and wherein the doctor blade is formed on the bearing.

32. The apparatus defined in claim 31 wherein the bearing has an aperture receiving the pad.