Masking methods using flexible strip

• US 5,407,716 A
• Filed: 09/28/1993
• Issued: 04/18/1995
• Est. Priority Date: 04/19/1991
• Status: Expired due to Term

• Current Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Original Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Inventors: Mitchell, Philip A.
• Primary Examiner(s): CANNON, JAMES
• Application Number:
  US08/122,501
• Time in Patent Office: 567 Days
• Field of Search: 428/40, 428/343, 428/354, 428/375, 428/202, 427/282, 427/421
• US Class Current: 156/267
• CPC Class Codes: B05B 12/24 made at least partly of flexible material, e.g. sheets of paper or fabric
• CPC Class Codes: B29C 59/007 Forming single grooves or ribs, e.g. tear lines, weak spots by moulding B29C37/0057; folding lines B29C53/06; in metal articles B21D17/00; by cutting B26D3/08
• CPC Class Codes: B29L 2007/005 Tarpaulins
• CPC Class Codes: B29L 2007/007 Narrow strips, e.g. ribbons, tapes, bands belts B29L2029/00; tapes as carrier of sound or information B29L2017/008
• CPC Class Codes: Y10T 156/108 Flash, trim or excess removal
• CPC Class Codes: Y10T 428/14 Layer or component removable to expose adhesive
• CPC Class Codes: Y10T 428/2486 with outer strippable or release layer
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/2848 Three or more layers
• CPC Class Codes: Y10T 428/2933 Coated or with bond, impregnation or core

Abstract

A method of masking an area of a surface using a length of flexible foam strip having a layer of adhesive applied on opposite sides of the strip. The strip is attached to the surface by one of the layers of adhesive and a sheet of material is attached to the opposite side of the strip by the other of the layers of adhesive. The strip and sheet then isolate the area of the surface from contiguous areas of the surface.

Claims

1. A method of masking a portion of a surface comprising the steps of:

providing a gasketting material comprising a length of flexible foam strip and first and second layers of adhesive applied on opposite sides of the strip, the adhesive forming the first layer of adhesive being less aggressive than the adhesive forming the second layer of adhesive;

attaching the strip to the surface by adhering the first less aggressive layer of adhesive on the strip to the surface; and

attaching a sheet of material to the strip by adhering the sheet of material to the second layer of adhesive so that the gasketting material and sheet isolate the portion of the surface to be masked from a contiguous portion of the surface.

2. A method according to claim 1 further including the step of trimming the sheet adjacent one side of the strip.

3. A method according to claim 1 wherein in said step of attaching a sheet of material a marginal edge portion of the sheet of material is attached to the strip.

4. A method according to claim 1 wherein in said step of attaching the strip the strip is attached to the surface so as to enclose a portion of the surface.

5. A method according to claim 1 wherein the periphery of a cross-section of the foam strip is a continuous smooth curve.

6. A gasketting material comprising a length of flexible foam strip having first and second opposite longitudinally extending surfaces, and a layer of adhesive applied on each of said surfaces, the adhesive in the layer of adhesive on said first surface being more aggressive than the adhesive in the layer of adhesive on said second surface.

7. A gasketting material according to claim 6 wherein said length of foam strip is endless.

8. A gasketting material according to claim 7 further including a sheet of material adhesively secured to the strip by one of said layers of adhesive.

9. A gasketting material according to claim 6 wherein the layers of adhesive on said first and second surfaces are visibly distinguishable from each other.

10. A gasketting material according to claim 8 wherein each of said layers of adhesive is continuous.

11. A gasketting material according to claim 6 wherein the periphery of a cross-section of the foam strip is a continuous smooth curve.

12. A gasketting material according to claim 11 wherein said periphery is either circular or elliptical.