Web conveyance method and apparatus using same

Patent metadata

Field	Value
Publication number	US-9845216-B2
Application number	US-201013498058-A
Country	US
Kind code	B2
Filing date	Sep 24, 2010
Priority date	Sep 24, 2009
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

A method for conveying a web using an engagement cover ( 10 ) comprising resilient looped pile ( 16 ) engagement surface. Also, web conveying roller ( 12 ) having an engagement cover thereon.

First claim

What is claimed is:

1. A method for conveying a web comprising:
(a) providing a web material wherein said web is an optical grade film selected from the group consisting of polyester, copolyesters, and combinations thereof;
(b) providing at least one roller having an engagement cover comprising a resilient looped pile engagement surface wherein said engagement surface is a knit fabric comprising a woven base layer having first and second faces and a resilient looped pile protruding from said first face, and wherein said looped pile has a loop height of from about 0.4 to about 0.8 mm, one loop per stitch, and at least 25 stitches per inch, and comprises fibers having a denier of between about 100 and about 500;
(c) configuring said web material into passing configuration; and
(d) passing said web through engaging contact with said engagement surface.

2. The method of claim 1 wherein said engagement surface is on a removable sleeve on said roller.

3. The method of claim 2 wherein said sleeve is a knitted fabric comprising a ground layer and a looped pile.

4. The method of claim 1 wherein said looped pile comprises a fibrous material selected from the group consisting of poly(tetrafluoroethylene), aramid, polyester, polypropylene, nylon, or a combinations thereof.

5. The method of claim 1 wherein said roller has two or more engagement covers mounted in concentric arrangement thereon.

6. The method of claim 1 wherein said looped pile has a loop height of from about 0.5 to about 0.7 mm.

7. The method of claim 1 wherein said looped pile has a one loop thread per stitch.

8. The method of claim 1 wherein said web material is provided in roll form and configuring said web material into passing configuration comprises unrolling said web material.

9. The method of claim 1 wherein said web material is extruded or cast in line to be configured into said passing configuration without having been wound into roll form.

10. The method of claim 1 wherein said web material is provided in sheet form.

11. The method of claim 1 comprising passing said web around two or more rollers.

12. The method of claim 1 wherein two or more of said rollers have an engagement cover thereon.

13. The method of claim 1 wherein two or more of said rollers each have multiple engagement covers thereon.

14. The method of claim 1 wherein said loop pile has a coefficient of friction from about 0.25 to about 2.0 with said web material.

15. The method of claim 1 wherein the web is passed through engaging contact with said engagement surface at a speed of 100 feet/minute or more.

16. The method of claim 1 wherein the web is passed through engaging contact with said engagement surface at a speed of 150 feet/minute or more.

17. An apparatus, the apparatus comprising a web wherein the web is an optical film selected from the group consisting of polyester, copolyesters, and combinations thereof, and a roller comprising a core and a resilient looped pile engagement cover comprising a resilient looped pile engagement surface wherein said engagement surface is a knit fabric comprising a woven base layer having first and second faces and a resilient looped pile protruding from said first face, and wherein said looped pile has a loop height of from about 0.4 to about 0.8 mm, one loop per stitch, and at least 25 stitches per inch, and comprises fibers having a denier of between about 100 and about 500.

Assignees

• Newhouse Kevin B
• Tait Bruce E
• Clark John C
• 3M Innovative Properties Co

Inventors

• Newhouse Kevin B
• Tait Bruce E
• Clark John C

Classifications

• B65H27/00 Primary

  Special constructions, e.g. surface features, of feed or guide rollers for webs (rollers in general F16C13/00) · CPC title

• F16C13/00

  Rolls, drums, discs, or the like (guide rollers in feeding webs B65H27/00; calender rolls, bearings therefor D21G1/02; rotary drums or rollers for heat-exchange or heat-transfer apparatus F28F5/02); Bearings or mountings therefor · CPC title

• B65H2701/1752

  Polymer film · CPC title

• F16C2326/58

  Conveyor systems, e.g. rollers or bearings therefor · CPC title

• B65H2404/114

  Built-up elements · CPC title