DUAL PRESSURE SENSITIVE ADHESIVE SHEET FOR INSTORE SIGNAGE

• US 20190308401A1
• Filed: 04/09/2018
• Published: 10/10/2019
• Est. Priority Date: 04/09/2018
• Status: Active Grant

• Current Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Original Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Inventors: HERRMANN, DOUGLAS K., RUIZ, ERWIN, FROMM, PAUL M.
• Granted Patent: US 10,525,687 B2
• Time in Patent Office: Days
• CPC Class Codes: B05C 1/027 only at particular parts of the articles at particular parts of work of indefinite length B05C1/16
• CPC Class Codes: B05C 1/0808 Details thereof, e.g. surface characteristics
• CPC Class Codes: B05C 1/0813 characterised by means for supplying liquid or other fluent material to the roller
• CPC Class Codes: B05C 1/0821 characterised by driving means for rollers or work
• CPC Class Codes: B05C 1/0834 the coating roller co-operating with other rollers, e.g. dosing, transfer rollers
• CPC Class Codes: B05C 1/16 only at particular parts of the work at particular parts of separate articles B05C1/027
• CPC Class Codes: B05C 9/06 for applying two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side of the work
• CPC Class Codes: B05D 1/28 performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
• CPC Class Codes: B05D 5/10 to obtain an adhesive surface
• CPC Class Codes: B05D 7/04 to surfaces of films or sheets producing layered products by applying coatings of pasty or pulverulent plastics B29C41/00
• CPC Class Codes: B29C 65/526 by printing or by transfer from the surfaces of elements carrying the adhesive, e.g. using brushes, pads, rollers, stencils or silk screens
• CPC Class Codes: B32B 2037/1253 curable adhesive
• CPC Class Codes: B32B 2405/00 Adhesive articles, e.g. adhesive tapes labels B32B2519/00
• CPC Class Codes: B32B 2590/00 Signboards, advertising panels, road signs
• CPC Class Codes: B32B 37/0053 Constructional details of laminating machines comprising rollers; Constructional features of the rollers
• CPC Class Codes: B32B 37/025 Transfer laminating
• CPC Class Codes: B32B 37/1284 Application of adhesive
• CPC Class Codes: B32B 37/1292 selectively, e.g. in stripes, in patterns B32B37/0076 takes precedence
• CPC Class Codes: B32B 38/0004 Cutting, tearing or severing, e.g. bursting; Cutter details cutting in general B26D; laminating combined with punching or perforating B32B38/04; removing all or part of the layers B32B38/10; cutting in combination with laying up and registration B32B38/185 takes precedence
• CPC Class Codes: B32B 38/10 Removing layers, or parts of layers, mechanically or chemically
• CPC Class Codes: C09J 7/38 : Pressure-sensitive adhesives [PSA]

Abstract

A tandem system of metering and donor rolls is used to apply two different adhesives to a fully adhesive backed multilayer sheet to produce variably distributed adhesives and properties. Each of the two adhesives is unique and is cured differently to create a layer of adhesive that has differing adhesive properties on the sheet. A clear adhesive is applied to a top portion of cards before they are cut from the sheet and has a higher tackiness than the adhesive applied to the rest of the cards on the sheet in order to reduce glue buildup on blades cutting the cards from the sheet.

Claims

1. An apparatus for applying dual pressure sensitive adhesives to separate zones of a sheet, comprising:

a sheet driven by drive rolls to receive different pressure sensitive adhesives onto separate and distinct zones thereof;

a first sump having a first pressure sensitive adhesive therein;

a first metering roll positioned to remove said first pressure sensitive adhesive from said sump;

a first transfer roll;

a first donor roll positioned in contact with said first metering roll and said first transfer roll and adapted to transfer said first pressure sensitive adhesive from said first metering roll to said first transfer roll with said first transfer roll transferring said first pressure sensitive adhesive onto said separate and distinct zones of said sheet;

a second sump having a second pressure sensitive adhesive therein;

a second metering roll positioned to remove said second pressure sensitive adhesive from said second sump;

a second transfer roll; and

a second donor roll positioned in contact with said second metering roll and said second transfer roll and adapted to transfer said second pressure sensitive adhesive from said second metering roll to said second transfer roll with said second transfer roll transferring said second pressure sensitive adhesive onto said separate and distinct zones of said sheet.

2. The apparatus of claim 1, wherein said separate and distinct zones on said sheet are created by said first and second donor rolls.

3. The apparatus of claim 2, wherein said pressure sensitive adhesive separate and distinct zone of said first donor roll is different and non-overlapping with respect to said pressure sensitive adhesive separate and distinct zone of said second donor roll.

4. The apparatus of claim 3, wherein said first and second donor rolls have raised ring portions thereon, and wherein said pressure sensitive adhesive separate and distinct zones are created by said raised ring portions.

5. The apparatus of claim 4, wherein said first pressure sensitive adhesive has adhesion that is different from the adhesion of said second pressure sensitive adhesive.

6. The apparatus of claim 4, wherein said first pressure sensitive adhesive is cured differently from said second pressure sensitive adhesive to create a layer of adhesive that has differing adhesive properties within said sheet.

7. The apparatus of claim 6, wherein said curing is accomplished with air.

8. The apparatus of claim 6, wherein said curing is done with ultra violet light.

9. The apparatus of claim 4, wherein said first and second transfer rolls form a nip with said drive rolls.

10. A method for applying a dual pressure sensitive adhesives to individual portions of media, comprising:

providing media for receiving dual pressure sensitive adhesives thereon;

providing drive rolls for conveying said media to a downstream location;

providing a pair of transfer rolls forming nips with said drive rolls for conveying said media to said downstream location;

providing a pair of sumps with each holding an adhesive of a different tackiness;

providing a pair of rotatable cylinder members with a portion of each extending into said pair of sumps, said pair of rotatable cylinders being adapted to pick up adhesives from said pair of sumps;

providing a pair of donor rolls mating with said pair of rotatable cylinder members with said pair of donor rolls being adapted pick up adhesives from said pair of rotatable cylinders; and

providing a pair of transfer rolls adapted to transfer adhesives from said pair of donor rolls to said media.

11. The method of claim 10, including providing each of said pair of donor rolls with raised cylindrical portions representing areas where adhesives will be applied to said media.

12. The method of claim 11, including providing said raised cylindrical portions on one of said pair of donor rolls is different and non-overlapping with respect to said raised cylindrical portions of the other of said donor rolls.

13. The method of claim 12, including providing an adhesive in one of said sumps that is flexible for adhesion to store shelves.

14. The method of claim 13, including providing an adhesive in the other of said pair of sumps that is less flexible than the adhesive in said one of said sumps.

15. An adhesive application system for applying two pressure sensitive adhesives onto a sheet, comprising:

a sheet driven by drive rolls to receive different pressure sensitive adhesives on different sections thereof;

tandem sumps having a different pressure sensitive adhesive in each;

tandem metering rolls positioned to remove pressure sensitive adhesive from each of said tandem sumps;

tandem transfer rolls; and

tandem donor rolls positioned in contact with said tandem metering rolls and said tandem transfer rolls, said tandem donor rolls being configured to transfer said pressure sensitive adhesives from said tandem metering rolls to said tandem transfer rolls with said tandem transfer rolls transferring said pressure sensitive adhesives onto said different portions of said sheet.

16. The adhesive application system of claim 15, wherein said tandem donor rolls include raised portions therearound configured to transfer adhesives from said tandem metering rolls onto said tandem transfer rolls.

17. The adhesive application system of claim 16, wherein said tandem transfer rolls form nips with said drive rolls.

18. The adhesive application system of claim 17, wherein said sheet is a web.

19. The adhesive application of claim 15, wherein said different pressure sensitive adhesives in each in each of said tandem sumps are cured differently.

20. The adhesive application of claim 19, wherein each of said raised portions on said tandem donor rolls have different widths.