Composite protective sheet material

{
  "publication_number": "US11345113B2",
  "country": "US",
  "kind": "B2",
  "title": "Composite protective sheet material",
  "abstract": "A composite protective sheet material for covering a smooth surface of a transparent material, especially but not exclusively for covering the surface of a lens. It comprises a film substrate at least one main surface of which is covered by an adhesive coating. At least a part of the said at least one main surface of the substrate is free or substantially free of adhesive, or has less adhesive applied to it than does the rest of that surface, thereby to provide a finger lift region of the film at an edge of the surface covered thereby.",
  "claims": [
    "1. A method of protecting a surface of a lens, said surface having a peripheral edge forming a peripheral edge of said lens, dimensions of the peripheral edge of said lens being such that the peripheral edge of the lens forms entire outer boundary of said lens, comprising the following steps: (a) coating at least one main surface of a tape with an adhesive, the step of coating including securing a strip of material around a roller and using the roller to spread the adhesive over said at least one main surface of the tape, so as to leave an area of said at least one main surface in which there is no adhesive coating; (b) forming a roll of the tape; and (c) cutting a portion of the tape from the roll and conforming said portion to substantially the exact dimensions of the peripheral edge of said lens; the portion being so cut and the lens being so covered with the cut portion that there is a void between the lens and a portion of said area whereby that portion of said area provides a finger lift region at said edge of said lens.",
    "2. A method according to claim 1, wherein said area is a strip along the length of the tape.",
    "3. A method according to claim 2, wherein the strip is central between main edges of the tape.",
    "4. A method according to claim 2, wherein the strip is off center in regards to its position across a width of the tape.",
    "5. A method according to claim 1, wherein the roll of the tape is formed by rolling the tape onto a reel.",
    "6. A method according to claim 1, wherein the adhesive coating is visually distinct from the tape.",
    "7. A method according to claim 6, wherein the adhesive is coloured with a dye.",
    "8. A method according to claim 7, wherein the tape is translucent.",
    "9. A method according to claim 7, wherein the tape is transparent.",
    "10. A method according to claim 2, wherein a width of said strip is in the range from 7 mm to 10 mm."
  ],
  "description_excerpt": "The present invention relates to a composite protective sheet material for covering a smooth surface of a transparent material, especially but not exclusively for covering the surface of a lens, comprising a film substrate and an adhesive coating which covers at least one main surface of the film substrate. Such a sheet material is applied to such a smooth surface to cover it and thereby protect it from scratches or other damage prior to use. A disadvantage of such a sheet material is that is that it is difficult to peel off when the time comes for the transparent material, whether the latter is in the form of a lens, a window, or the transparent cover of a computer screen, to be put into use, especially if the transparent material is in the form of a lens for use in spectacles which are currently made thin so that their edges are especially thin. The present invention seeks to provide a remedy. Accordingly, the present invention is directed to a composite protective sheet material as set out in the opening paragraph of the present specification, characterised in that at least a part of the said at least one main surface of the substrate is free or substantially free of adhesive, or has less adhesive applied to it than does the rest of that surface, thereby to provide a finger lift region of the film at an edge of the surface covered thereby.\n\nThe sheet material may be elongate, for example in the form of tape, which may be a roll of tape, which may be wound onto a reel. The said part may be an elongate strip. If the sheet material is also elongate, the strip may run along the length thereof.",
  "cpc": [
    "B32B 3/06",
    "A45C 11/04",
    "A61K 9/02",
    "A61K 9/025",
    "B32B 2307/748",
    "B32B 2405/00",
    "B32B 2551/00",
    "B32B 27/306",
    "B32B 27/32",
    "B32B 3/02",
    "B32B 37/0076",
    "B32B 7/05",
    "B32B 7/12",
    "B65G 49/069",
    "G02C 7/16",
    "G02C 9/04",
    "Y10T 156/1062",
    "Y10T 428/24612"
  ],
  "ipc": [
    "A45C 11/04",
    "A61K 9/02",
    "B32B 27/30",
    "B32B 27/32",
    "B32B 3/02",
    "B32B 3/06",
    "B32B 37/00",
    "B32B 7/05",
    "B32B 7/12",
    "B65G 49/00",
    "B65G 49/06",
    "G02C 7/16",
    "G02C 9/04"
  ],
  "assignees": [
    "CERIUM GROUP LTD"
  ],
  "inventors": [
    "SANGSTER CLIVE L",
    "NOAKES TIMOTHY"
  ],
  "filing_date": "2017-11-16",
  "publication_date": "2022-05-31",
  "grant_date": "2022-05-31",
  "priority_date": "2011-08-30",
  "application_number": "US-201715814587-A",
  "family_id": "44838948",
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}