US20130052427A1 - Composite protective sheet material - Google Patents

Composite protective sheet material Download PDF

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Publication number
US20130052427A1
US20130052427A1 US13/542,748 US201213542748A US2013052427A1 US 20130052427 A1 US20130052427 A1 US 20130052427A1 US 201213542748 A US201213542748 A US 201213542748A US 2013052427 A1 US2013052427 A1 US 2013052427A1
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US
United States
Prior art keywords
sheet material
material according
adhesive
film substrate
tape
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/542,748
Inventor
Clive L. Sangster
Timothy Noakes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cerium Group Ltd
Original Assignee
Cerium Group Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cerium Group Ltd filed Critical Cerium Group Ltd
Assigned to CERIUM GROUP LIMITED reassignment CERIUM GROUP LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NOAKES, TIMOTHY, SANGSTER, CLIVE L.
Publication of US20130052427A1 publication Critical patent/US20130052427A1/en
Priority to US15/814,587 priority Critical patent/US11345113B2/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/06—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions for securing layers together; for attaching the product to another member, e.g. to a support, or to another product, e.g. groove/tongue, interlocking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C11/00—Receptacles for purposes not provided for in groups A45C1/00-A45C9/00
    • A45C11/04—Spectacle cases; Pince-nez cases
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/02—Suppositories; Bougies; Bases therefor; Ovules
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/02—Suppositories; Bougies; Bases therefor; Ovules
    • A61K9/025—Suppositories; Bougies; Bases therefor; Ovules characterised by shape or structure, e.g. hollow layered, coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/748—Releasability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2405/00—Adhesive articles, e.g. adhesive tapes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2551/00—Optical elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0076—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised in that the layers are not bonded on the totality of their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/05—Interconnection of layers the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G49/00—Conveying systems characterised by their application for specified purposes not otherwise provided for
    • B65G49/05—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles
    • B65G49/06—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles for fragile sheets, e.g. glass
    • B65G49/068—Stacking or destacking devices; Means for preventing damage to stacked sheets, e.g. spaces
    • B65G49/069—Means for avoiding damage to stacked plate glass, e.g. by interposing paper or powder spacers in the stack
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/16—Shades; shields; Obturators, e.g. with pinhole, with slot
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C9/00—Attaching auxiliary optical parts
    • G02C9/04—Attaching auxiliary optical parts by fitting over or clamping on
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24612—Composite web or sheet

Definitions

  • 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.
  • 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.
  • the 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. If the sheet material is in the form of a tape, the said part may extend all the way along the tape. This provides the advantage that wherever the tape is cut transversely, a finger lift region will be provided. It also provides the advantage of ease of manufacture, for example by securing a short strip of paper or other material around a roller which is used to even the spread of adhesive over the film substrate when the composite sheet material is manufactured.
  • the adhesive may be visually distinct from the film substrate, for example it may be made visually distinct by being coloured with a die, to render the position of the finger lift region more evident. This is all the more so if the film substrate is transparent or at least translucent.
  • the present invention extends to a lens having a surface covered by a composite protective sheet material in accordance with the present invention.
  • FIG. 1 shows a roll of tape made in accordance with the prior art
  • FIG. 2 shows a view from above of a circular lens covered with a portion of the tape cut in the shape of a disc from the roll shown in FIG. 1 ;
  • FIG. 3 shows diagrammatically a roll of tape embodying the present invention
  • FIG. 4 shows a view from above of a circular lens covered with a portion of the tape cut in the shape of a disc from the roll shown in FIG. 3 ;
  • FIG. 5 shows diagrammatically and not to scale a cross-sectional view of the lens and cover shown in FIG. 4 taken in the plane indicated by the line V-V in FIG. 4 .
  • the prior art tape 10 shown in FIGS. 1 and 2 comprises a composite protective sheet material 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.
  • the adhesive has been applied uniformly over the entire main surface on one side of the tape, and therefore attaches everywhere to that side of the circular lens to which it is secured as shown in FIG. 2 .
  • the tape 12 embodying the present invention and shown in FIGS. 3 to 5 comprises a film substrate 14 of substantially uniform thickness of transparent terpolymer polyethylene and an adhesive coating 16 of substantially uniform thickness of an acrylic based copolymer in solution, coloured with a green dye, which covers one main surface of the film substrate 14 .
  • the substrate is substantially 100 mm wide and substantially 100 microns in thickness.
  • the roll of tape in FIG. 3 is about 35 m in length.
  • the coating 16 is substantially 22 microns in thickness.
  • FIG. 3 shows a roll of the tape 12 wound on a reel 18 .
  • a circular portion of tape 12 from the roll shown in FIG. 3 has been cut to substantially exactly the dimensions of a plastics lens 20 one surface 22 of which the tape 12 covers, to protect that surface 22 against scratching and other possible damage.
  • the tape 12 shown in FIGS. 3 to 5 is formed with an area in the form of a strip 24 running the entire length of the roll shown in FIG. 3 and therefore across the entire width of the circle of tape, as shown in FIG. 4 , in which strip there is no adhesive on the film substrate 14 .
  • the strip lies substantially midway between the edges 25 a and 25 b of the tape 12 .
  • the strip 24 is substantially 9 mm wide.
  • the film substrate 14 may be one of poly(ethylene/acid) copolymer, or polyethylene ethyl vinyl acetate, for example, or indeed of any suitable plastics material that will readily occur to those of the art.
  • the adhesive of the coating 16 may be one of a modified acrylic copolymer or a hydrocarbon resin, or indeed any adhesive that will readily occur to the reader of the art as being suitable.
  • the adhesive may be solvent based, water based or hot melt. It may be coloured or otherwise shaded any colour or shade other than green, and it does not have to be coloured or shaded at all although this will assist in showing the finger lift regions.
  • the width of the tape 12 may vary from 50 mm or less to 200 mm or more. It may have any length beyond about 50 mm.
  • the thickness of the film substrate 14 may be from 100 microns to 130 microns, or it may be from 50 microns, or less, to 200 microns, or more.
  • the thickness of the adhesive coating 16 may be substantially 15 microns, or from 5 microns, or less, to 50 microns, or more.
  • the width of the strip 24 may be from 7 mm to 10 mm, although it may be narrower or wider, provided it is not so wide that it creates an unacceptable risk of accidental peeling from a lens for example, nor so narrow that it does not afford assistance in enabling the sheet material to be peeled off a lens for example.
  • the strip 24 may be off centre as regards its position across the width of the tape 12 , provided it is spaced from the edges thereof.
  • the area in which adhesive is absent or at least thinner does not have to be a strip 24 , but may comprise a plurality of circles or other shapes for example spread over the film substrate 14 .
  • the tape 12 may be provided with a releasable peel-off backing (not shown) which covers the adhesive coating 16 .
  • the plastics of the lens 20 may be allyl diglycol carbonate or any other suitable plastics material such as polycarbonate.
  • the material of the lens may instead comprise glass.

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.

Description

  • 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.
  • The 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. If the sheet material is in the form of a tape, the said part may extend all the way along the tape. This provides the advantage that wherever the tape is cut transversely, a finger lift region will be provided. It also provides the advantage of ease of manufacture, for example by securing a short strip of paper or other material around a roller which is used to even the spread of adhesive over the film substrate when the composite sheet material is manufactured.
  • The adhesive may be visually distinct from the film substrate, for example it may be made visually distinct by being coloured with a die, to render the position of the finger lift region more evident. This is all the more so if the film substrate is transparent or at least translucent.
  • The present invention extends to a lens having a surface covered by a composite protective sheet material in accordance with the present invention.
  • An example of a composite protective sheet material made in accordance with the present invention will now be described in greater detail with reference to the accompanying drawing, in which:
  • FIG. 1 shows a roll of tape made in accordance with the prior art;
  • FIG. 2 shows a view from above of a circular lens covered with a portion of the tape cut in the shape of a disc from the roll shown in FIG. 1;
  • FIG. 3 shows diagrammatically a roll of tape embodying the present invention;
  • FIG. 4 shows a view from above of a circular lens covered with a portion of the tape cut in the shape of a disc from the roll shown in FIG. 3; and
  • FIG. 5 shows diagrammatically and not to scale a cross-sectional view of the lens and cover shown in FIG. 4 taken in the plane indicated by the line V-V in FIG. 4.
    •
  • The prior art tape 10 shown in FIGS. 1 and 2 comprises a composite protective sheet material 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. The adhesive has been applied uniformly over the entire main surface on one side of the tape, and therefore attaches everywhere to that side of the circular lens to which it is secured as shown in FIG. 2.
  • The tape 12 embodying the present invention and shown in FIGS. 3 to 5 comprises a film substrate 14 of substantially uniform thickness of transparent terpolymer polyethylene and an adhesive coating 16 of substantially uniform thickness of an acrylic based copolymer in solution, coloured with a green dye, which covers one main surface of the film substrate 14.
  • The substrate is substantially 100 mm wide and substantially 100 microns in thickness. The roll of tape in FIG. 3 is about 35 m in length. The coating 16 is substantially 22 microns in thickness.
  • FIG. 3 shows a roll of the tape 12 wound on a reel 18. In FIGS. 4 and 5, a circular portion of tape 12 from the roll shown in FIG. 3 has been cut to substantially exactly the dimensions of a plastics lens 20 one surface 22 of which the tape 12 covers, to protect that surface 22 against scratching and other possible damage.
  • However, unlike the prior art tape 10, the tape 12 shown in FIGS. 3 to 5 is formed with an area in the form of a strip 24 running the entire length of the roll shown in FIG. 3 and therefore across the entire width of the circle of tape, as shown in FIG. 4, in which strip there is no adhesive on the film substrate 14. The strip lies substantially midway between the edges 25 a and 25 b of the tape 12.
  • As a result, although the lens surface under the strip 24 is covered and therefore protected by the film substrate 14, there is a small void between the lens 20 and the film substrate 14 under this strip 24, which provides finger lift regions 26 and 28 where the strip 20 meets the edge of the lens 20. The position of these regions 26 and 28 is made evident to the user by virtue of the transparency of the film substrate 14 and the fact that the adhesive of the coating 16 is coloured green, so that the strip stands out as more or less colourless against the green of the adhesive. In these regions 26 and 28, because of the absence of adhesive 16, it is easier for the user to insert a fingernail for example to lift the tape 12 and then to peel it off the lens 20 when the lens 20 is to be prepared ready for use.
  • The strip 24 is substantially 9 mm wide.
  • Instead of terpolymer polyethylene, the film substrate 14 may be one of poly(ethylene/acid) copolymer, or polyethylene ethyl vinyl acetate, for example, or indeed of any suitable plastics material that will readily occur to those of the art. Instead of an acrylic based copolymer in solution, the adhesive of the coating 16 may be one of a modified acrylic copolymer or a hydrocarbon resin, or indeed any adhesive that will readily occur to the reader of the art as being suitable. The adhesive may be solvent based, water based or hot melt. It may be coloured or otherwise shaded any colour or shade other than green, and it does not have to be coloured or shaded at all although this will assist in showing the finger lift regions.
  • The width of the tape 12 may vary from 50 mm or less to 200 mm or more. It may have any length beyond about 50 mm. The thickness of the film substrate 14 may be from 100 microns to 130 microns, or it may be from 50 microns, or less, to 200 microns, or more. The thickness of the adhesive coating 16 may be substantially 15 microns, or from 5 microns, or less, to 50 microns, or more.
  • The width of the strip 24 may be from 7 mm to 10 mm, although it may be narrower or wider, provided it is not so wide that it creates an unacceptable risk of accidental peeling from a lens for example, nor so narrow that it does not afford assistance in enabling the sheet material to be peeled off a lens for example. The strip 24 may be off centre as regards its position across the width of the tape 12, provided it is spaced from the edges thereof. The area in which adhesive is absent or at least thinner does not have to be a strip 24, but may comprise a plurality of circles or other shapes for example spread over the film substrate 14.
  • The tape 12 may be provided with a releasable peel-off backing (not shown) which covers the adhesive coating 16.
  • The plastics of the lens 20 may be allyl diglycol carbonate or any other suitable plastics material such as polycarbonate. The material of the lens may instead comprise glass.
  • Many other modifications and variations to the tape 12 shown in FIGS. 3 to 5 may occur to the reader without taking the resulting construction of tape outside the scope of the present invention.

Claims (14)

1. 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, wherein 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.
2. A sheet material according to claim 1, wherein the sheet material is elongate.
3. A sheet material according to claim 2, wherein the sheet material is in the form of tape.
4. A sheet material according to claim 3, wherein the sheet material is in the form of a roll of tape.
5. A sheet material according to claim 4, wherein the sheet material is wound onto a reel.
6. A sheet material according to claim 1, wherein the said part is an elongate strip.
7. A sheet material according to claim 2, wherein the strip runs along the length of the sheet material.
8. A sheet material according to claim 4, wherein the said part extends all the way along the tape.
9. A sheet material according to claim 1, wherein the adhesive is visually distinct from the film substrate, to render the position of the finger lift region more evident.
10. A sheet material according to claim 9, wherein the adhesive is coloured with a dye.
11. A sheet material according to claim 1, wherein the film substrate is translucent.
12. A sheet material according to claim 11, wherein the film substrate is transparent.
13. A lens having a surface covered by a composite protective sheet material as claimed in claim 1.
14. A method of making a sheet material according to claim 1, wherein a strip of material is secured around a roller which is used to even the spread of adhesive over the film substrate.
US13/542,748 2011-08-30 2012-07-06 Composite protective sheet material Abandoned US20130052427A1 (en)

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Application Number Priority Date Filing Date Title
US15/814,587 US11345113B2 (en) 2011-08-30 2017-11-16 Composite protective sheet material

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GB1114991.1 2011-08-30
GBGB1114991.1A GB201114991D0 (en) 2011-08-30 2011-08-30 A composite protective sheet material

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/814,587 Continuation US11345113B2 (en) 2011-08-30 2017-11-16 Composite protective sheet material

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US13/542,748 Abandoned US20130052427A1 (en) 2011-08-30 2012-07-06 Composite protective sheet material
US15/814,587 Active 2033-11-11 US11345113B2 (en) 2011-08-30 2017-11-16 Composite protective sheet material

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EP (1) EP2565026B1 (en)
GB (1) GB201114991D0 (en)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11396615B2 (en) * 2017-04-25 2022-07-26 Sumitomo Bakelite Co., Ltd. Protective film

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201114991D0 (en) 2011-08-30 2011-10-12 Cerium Group Ltd A composite protective sheet material

Citations (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2399545A (en) * 1942-11-18 1946-04-30 Bernard E Davis Adhesive tape
US2510120A (en) * 1946-05-31 1950-06-06 Russell J Leander Masking paper
US2759394A (en) * 1952-01-05 1956-08-21 David L Evans Glare shield for spectacle lens
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EP2565026B1 (en) 2017-06-14
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US11345113B2 (en) 2022-05-31
HUE034277T2 (en) 2018-02-28
US20180072015A1 (en) 2018-03-15

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