WO2002038369A1 - Writable document protector assembly - Google Patents

Writable document protector assembly Download PDF

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Publication number
WO2002038369A1
WO2002038369A1 PCT/US2001/043492 US0143492W WO0238369A1 WO 2002038369 A1 WO2002038369 A1 WO 2002038369A1 US 0143492 W US0143492 W US 0143492W WO 0238369 A1 WO0238369 A1 WO 0238369A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet
protector
writable
sheet protector
transparent
Prior art date
Application number
PCT/US2001/043492
Other languages
French (fr)
Inventor
Norman Yamamoto
Chitto R. Sarkar
Sriram Venkatasanthanam
Ramin Heydarpour
Frank Y. Shih
Original Assignee
Avery Dennison Corporation
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 Avery Dennison Corporation filed Critical Avery Dennison Corporation
Priority to AU2002217792A priority Critical patent/AU2002217792A1/en
Publication of WO2002038369A1 publication Critical patent/WO2002038369A1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42FSHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING
    • B42F11/00Filing appliances with separate intermediate holding means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42FSHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING
    • B42F5/00Sheets and objects temporarily attached together; Means therefor; Albums
    • B42F5/02Stamp or like filing arrangements in albums
    • B42F5/04Stamp or like filing arrangements in albums with transparent pockets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42FSHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING
    • B42F7/00Filing appliances without fastening means
    • B42F7/02Filing appliances comprising only one pocket or compartment, e.g. single gussetted pockets
    • B42F7/025Filing appliances comprising only one pocket or compartment, e.g. single gussetted pockets made of transparent material

Definitions

  • This invention relates to transparent sheet or document protectors.
  • Such protection has often been in the form of transparent envelopes or pockets which are closed on three sides but which have one side open to receive the material.
  • document or sheet protectors are often formed of transparent sheet material such as polyolefin, specifically polypropylene sheet material. With documents or other material within the sheet protector, it would be desirable to be able to write on the transparent plastic and make notes relative to the visible material within the document protector. However, polypropylene and most other transparent plastic materials do not readily accept writing with a pen or the like.
  • topcoat layer using a solvent which is removed by drying, leaving an ink receptive coating.
  • top coats often lack durability and can flake off and in some cases interfere with the manufacturing steps involved in the formation of the document protector.
  • an ink writable transparent document protector is formed by a co-extrusion process in which water-insoluble plastic, such as polypropylene, is co-extruded with a blend of water-insoluble material and water-soluble material, thereby forming an integral transparent film that is writable and that has good mechanical properties.
  • the resultant film is formed into an envelope or pocket, and subsequently one can write on the document protector using virtually any kind of ink.
  • a large sheet of the co-extruded material is folded over to form an envelope, and two of the three remaining edges are heat bonded together to form the document protector, closed on three sides and open on the fourth side.
  • This configuration permits the insertion of a sheet, such as a document, photograph, or any other material requiring protection.
  • the document protection assembly may be provided with reinforcing along one edge, and holes to facilitate mounting in a ring binder. For reinforcing, an additional strip of plastic sheet material may be heat sealed into the edge of the document protector, thereby providing three plastic layers through which the holes are made to increase the strength at this vulnerable area.
  • the sheet protectors are also suitable for use in photo albums where the pages may include writable transparent pockets for receiving photos.
  • One particular embodiment of the present invention is a photograph sheet protector having one or more pockets in which photographs may be inserted.
  • the end-user may write on one or both exterior surfaces of the sheet protector without damaging the photograph.
  • Embodiments of the document protector made as described above are of high strength, and specific embodiments may be receptive to virtually any kind of ink and be fully transparent.
  • FIG. 1 is a plan view of an illustrative embodiment of the invention
  • Fig. 2 is a cross-sectional view taken along line 2-2 of Fig. 1 ;
  • Fig. 3 is a cross-sectional view of sheet material which may be employed to form the sheet protector of Fig. 1;
  • Fig. 4 is a cross-sectional view of an alternative sheet construction
  • Fig. 5 is a schematic showing of a co-extrusion apparatus for forming the sheet material of Figs. 3 or 4;
  • Fig. 6 shows sheet protector arrangements illustrating the invention used in a photo album
  • Fig. 7 is a cross-sectional view taken along line 7-7 of Fig. 6;
  • Fig. 8 is a schematic showing of one of the photos of Fig. 6 with notes on the sheet protector;
  • Fig. 9 is a plan view of a sheet protector having pockets for placing photographs and other documents therein;
  • Fig. 10 is a cross-sectional view of the sheet protector of Fig. 9;
  • Fig. 11 is a photo album having a sheet protector with photographs placed in pockets;
  • Fig. 12 is a side view of a double-sided sheet protector showing pockets on either side of the sheet protector for holding photographs;
  • Fig. 13 is a schematic showing of one pocket holding a photograph and having notes written on the sheet protector.
  • Figure 1 is a plan view of a sheet protector 10, which includes an upper transparent plastic sheet 12 and a lower transparent plastic sheet 14. These two sheets may be formed from a single sheet folded over at the outer edge 16, or alternatively can be made of two overlying sheets.
  • the sheet protector 10 may be open at the top edge, as shown in Figure 1, but may be heat sealed along the lower edge 18 and may be heat sealed along lines 20 and 22 with an extra reinforcing strip 24 mounted between the thermo- sealing lines 20 and 22.
  • the reinforced left edge of the sheet protector 10 may be provided with three or more holes 26 for convenience in mounting the sheet protector into a three-ring binder.
  • the heat sealing may be accomplished by applying a heated die to the double layer material.
  • the heat sealing may be in the form of a series of welds with spaces between the welds to allow for the easy insertion of sheet material.
  • the edges may be secured together in any desired manner, by high frequency welding, by a thin line of permanent adhesive, or by other known techniques.
  • Concerning the size of the sheet protector one sample sheet protector was approximately nine inches in width and about 11-1/8 inches in its longer dimension.
  • the reinforcing strip 24 was about 3/8 inch wide.
  • the pocket was large enough to receive an unfolded sheet, 8 l ⁇ inches by 11 inches in size.
  • Each of the co-extruded sheets was about 3 or 4 mils thick.
  • certain legends 34 calling attention to certain passages or parts of the letter 32.
  • comments may be made relative to the letter 32 without defacing the letter itself. Subsequently, if desired, the original letter 32 may be withdrawn from the envelope.
  • Figures 3 and 4 are detailed cross-sectional views indicating the implementation of the transparent sheet material employed in the sheet protector of Figures 1 and 2 of the drawings. More specifically, referring to Figure 3, the sheet material 42 may include a base layer 44 of transparent plastic which is water insoluble, such as polypropylene.
  • the upper layer 46 which is co-extruded with the lower layer 44 is a writable layer and may be a blend of non- water-soluble material and water-soluble material, such as a blend of poly vinyl alcohol and polypropylene or of polyalkyl oxazaline and a polyolefin, such as polypropylene.
  • FIG. 4 shows a three-layer assembly of transparent plastic materials involving a water-insoluble base layer 52, a writable layer 54, which is made up of a blend of non- water-soluble and water-soluble polymeric material, with an intermediate layer 56, which is provided to help bond the upper and lower layers 52 and 54 to one another when they are being co-extruded.
  • Figure 5 is a schematic block diagram illustrating the co-extrusion process.
  • the materials to be co-extruded are provided in the input containers 62" and 64, with the input container 66 being provided in cases where a three-layer transparent laminate is being formed.
  • the upper container 62 may contain heated material for forming the writable top layer, while the container 64 may contain the heated plastic material for forming the water insoluble lower layer of the laminate. Heated material from container 62 and 64, and also 66 when an intermediate layer is desired, are fed to the feed block 68 and the die 70, which extrude the multiple-layer heat material 72, which is eventually wound up onto a reel 74.
  • FIGs 6, 7, and 8 of the drawings show another use of the present invention. More specifically, referring to Figure 6, a photo album 82 is provided with a front cover 84, a rear cover 86, and pages which are formed of transparent pockets 88 mounted on a paper or a light card page sheet 90. Each of the pockets 88 include an inner layer 92 and an outer layer 94 which is writable. The inner layer 96 may be fastened to the supporting page 90. Alternatively, instead of being mounted on the page 90, the sheet protectors themselves may be the pages of the photo album with these transparent pages being bound directly into the photo album or through mounting arrangements such as removable screws or the rings of a three-ring binder.
  • Figure 8 is a front view of one of the pockets 88 with a photograph 100 mounted in the document protector.
  • Legends 102 and 104 may be added in ink on the outside of the document protector to indicate the place where the photograph was taken, and the names of persons or objects in the photo.
  • Ink receptive substrates to be employed as the sheet material comprise a base layer formed from a water-insoluble thermoplastic polymer, and an ink receptive layer disposed over the base layer.
  • the ink receptive layer is formed from a melt processable blend of a water- soluble polymer and a substantially water-insoluble polymer, and provides an inherently ink receptive surface without further surface treatment.
  • a tie layer can optionally be interposed between base and ink receptive layer.
  • the base layer is selected from the group of thermoplastic material consisting of polyolefins, polyesters, polyurethanes, poly vinyl chlorides, polyamides, polystyrene, ethylene vinyl alcohol, and mixtures thereof.
  • the ink receptive blend comprises in the range of from 20 to 80 percent by weight water-soluble polymer, and in the range of from 20 to 80 percent by weight substantially water-insoluble polymer based on the total weight of the blend.
  • the blend may include an optional compatibilizing agent that is chemically compatible with both the water- soluble polymer and the substantially water-insoluble polymer.
  • the blend has a melting temperature in the range of from about 100 to 600°F.
  • the water- soluble polymer component of the blend is selected from the group of compounds consisting of polyvinyl alcohols, polyalkyl oxazolines, polyphenyl oxazolines, polyvinyl pyrrolidones, polyacrylic-acids, polymethyl methacrylates, polymethyl methacrylic-acids, styrene maleic anhydrides, alkyl celluloses, carboxyalkyl celluloses, hydroxyalkyl celluloses, polyethylene oxides, polyethylene-imines, and mixtures thereof.
  • Preferred water-soluble polymers include polyalkyl oxazoline and polyvinyl alcohol.
  • the substantially water-insoluble polymer component of the blend is selected from the group of polyolefins consisting of modified and unmodified polyesters, polypropylenes, polyethylenes, polystyrenes, polybutylenes, and copolymers and mixtures thereof.
  • the base layer and ink receptive layer of ink receptive substrates are formed simultaneously by co-extrusion process.
  • Ink receptive substrates can include the ink receptive layer on one or both surfaces of the base layer, and/or can be constructed in the form of a pressure-sensitive adhesive label, i.e., with a pressure-sensitive adhesive material disposed on a surface of the base layer opposite the ink receptive layer.
  • the ink receptive substrates are inherently ink receptive in that they avoid that need for top-coating or reliance on a voided microstructure to gain ink receptivity.
  • the ink receptive substrates provide properties of image quality and optics that are superior to those provided by substrates having voided microstructures.
  • the ink receptive substrates are fabricated in a manner that avoids the need for multiple time-consuming and costly process steps.
  • the sheet protector may be a writable assembly for protecting photographs.
  • the pages are one or two-sided photograph-holding, pocketed sheet structures that include two generally clear sheets, and a backing or central sheet that is typically white or opaque.
  • the page includes an area for holding at least one photograph.
  • each clear sheet is subdivided into a series of areas for holding photographs.
  • the pockets are preferably rectangular, but may be other shapes.
  • a series of strips or other areas act as borders surrounding the photo pockets. The strips are typically not as wide as the photo pockets.
  • the clear sheeting permits writing with water- based writing instruments, such as ball-point pens and roller-ball pens, and/or other writing instruments with solvent-based or other ink, and/or inkjet or other printers.
  • the photo pages include two sheets of coextruded ERSA material, as described above.
  • a central backing sheet of white polyester film is interposed in between the two clear sheets.
  • Photo pockets and marginal areas are defined by weld lines, which may be formed by conventional methods known in the art.
  • the outer surface of one or both sheets is adapted to receive and retain writing from a writing instrument, and may alternatively receive printing from a printer, such as from an inkjet printer.
  • the writable photo pages may permit the user to inscribe both the clear sheeting over the photographs, and the border areas of the clear sheeting, to illustrate, one might circle an area of a landscape photograph and write in the margin, "This is where we intend to build our new home.”
  • Figure 9 is a plan view of a sheet protector 210, which is formed from a transparent sheet 212.
  • the sheet protector 210 is double-sided, as shown in FIG. 12, and includes a front transparent sheet 214 and a back transparent sheet 216 formed from the transparent plastic sheet 212. These first and second sheets 214 and 216 may be formed from the transparent sheet 212 by folding the transparent sheet 212 over at the outer edge 218.
  • the double-sided sheet protector 210 can be made of two separate, overlying transparent sheets to form front and back transparent sheets 214 and 216.
  • the sheet protector 210 may be open near the top edge, as shown in FIG. 9, for placing documents in the sheet protector 210.
  • the sheet protector 210 may also be heat sealed along the lower edge 220 and may be heat sealed along lines 222 and 224 with an extra reinforcing strip 226 mounted between the thermo-sealing lines 222 and 224.
  • the reinforced left edge 228 of the sheet protector 210 may be provided with one or more holes 30 for convenience in mounting the sheet protector 10 into a ring binder.
  • FIG. 9 shows one embodiment in which the sheet protector 210 is configured to hold two photographs on a side of the sheet protector 210.
  • the sheet protector 210 is configured to hold three or more photographs on a side. It should be understood that the sheet protector 210 can be configured to hold multiple photographs of varying sizes on each side. Any number of pockets may also be used on each side, such that consumers can use different sheet protectors 210 depending on the size of their photographs, or on the number of photographs they wish to display on a given side of the sheet protector 210.
  • FIG. 10 is cross-sectional view of the sheet protector 210, also includes a backing sheet 232 positioned between the front transparent sheet 214 and the back transparent sheet 216.
  • the backing sheet 232 may be an opaque sheet made from polypropylene material.
  • the backing sheet 232 is placed the front and back transparent sheets 214 and 216 to provide a separation layer such that different documents can be placed between the front transparent sheet 214 and the backing sheet 232, and between the back transparent sheet 16 and the backing sheet 232.
  • Heat sealing of the front and back transparent sheets 214 and 216 may be accomplished by applying a heated die to the double layer material. The heat sealing may be in the form of a series of welds with spaces between the welds to allow for the easy insertion of sheet material.
  • the edges may be secured together in any desired manner, by high frequency welding, by a thin line of permanent adhesive, or by other known techniques.
  • the size of the sheet protector may vary depending on the size of the document or photograph to be placed therein. For example, one sheet protector is approximately nine inches in width and about 11-1/8 inches in its longer dimension.
  • the reinforcing strip 24 is about 3/8 inch wide.
  • the pocket is large enough to receive an unfolded sheet, 8 2 inches by 11 inches in size. Each of the co-extruded sheets was about 3 or 4 mils thick.
  • the sheet protector is the size of a conventional photo album. Multiple pockets may be formed on the sheet protector for holding several photographs per page. Pocket size is large enough to hold standard photographs, such as for example a 3 inch by 5 inch photograph.
  • a photograph 234 can be placed to be protected from damage by the sheet protector 210.
  • certain legends 236 calling attention to certain parts of the photograph 234.
  • the original photograph 234 may be withdrawn from the sheet protector 210. Note from Figures 9-13 that multiple photographs may be placed in the sheet protector 210 and that different legends 236 can be made upon the sheet protector 210 regarding different photographs 234 placed the various pockets of the sheet protector 210.
  • the material used to make the transparent sheet 212 may include a base layer of transparent plastic which is water insoluble, such as polypropylene.
  • the upper layer which may be co-extruded with the lower layer, is a writable layer and may be a blend of non- water-soluble material and water-soluble material, such as a blend of polyvinyl alcohol and polypropylene or of polyalkyl oxazaline and a polyolefin, such as polypropylene.
  • An intermediate layer may also be used to help bond the upper and lower layers to one another when they are being co-extruded.
  • ink receptive substrates to be employed as the sheet material comprise a base layer formed from a water-insoluble thermoplastic polymer, and an ink receptive layer disposed over the base layer.
  • the ink receptive layer may be formed from a melt processable blend of a water-soluble polymer and a substantially water-insoluble polymer, and provides an inherently ink receptive surface without further surface treatment.
  • a tie layer can optionally be interposed between base and ink receptive layer.
  • the base layer may be selected from the group of thermoplastic material consisting of polyolefins, polyesters, polyurethanes, polyvinyl chlorides, polyamides, polystyrene, ethylene vinyl alcohol, and mixtures thereof.
  • the ink receptive blend comprises in the range of from 20 to 80 percent by weight water-soluble polymer, and in the range of from 20 to 80 percent by weight substantially water-insoluble polymer based on the total weight of the blend.
  • the blend may include an optional compatibilizing agent that is chemically compatible with both the water- soluble polymer and the substantially water-insoluble polymer.
  • the blend has a melting temperature in the range of from about 100 to 600°F.
  • the water- soluble polymer component of the blend is selected from the group of compounds consisting of polyvinyl alcohols, polyalkyl oxazolines, polyphenyl oxazolines, polyvinyl pyrrolidones, polyacrylic-acids, polymethyl methacrylates, polymethyl methacrylic-acids, styrene maleic anhydrides, alkyl celluloses, carboxyalkyl celluloses, hydroxyalkyl celluloses, polyethylene oxides, polyethylene-imines, and mixtures thereof.
  • Preferred water-soluble polymers include polyalkyl oxazoline and polyvinyl alcohol.
  • the substantially water-insoluble polymer component of the blend is selected from the group of polyolefins consisting of modified and unmodified polyesters, polypropylenes, polyethylenes, polystyrenes, polybutylenes, and copolymers and mixtures thereof.
  • the base layer and ink receptive layer of ink receptive substrates are formed simultaneously by co-extrusion process.
  • Ink receptive substrates can include the ink receptive layer on one or both surfaces of the base layer, and/or can be constructed in the form of a pressure-sensitive adhesive label, i.e., with a pressure-sensitive adhesive material disposed on a surface of the base layer opposite the ink receptive layer.
  • the ink receptive substrates are inherently ink receptive in that they avoid the need for top-coating or reliance on a voided microstructure to gain ink receptivity.
  • the ink receptive substrates provide properties of image quality and optics that are superior to those provided by substrates having voided microstmctures.
  • the ink receptive substrates are fabricated in a manner that avoids the need for multiple time-consuming and costly process steps.
  • FIG. 11 shows another embodiment of the present invention.
  • a photo album 238 is provided with a front cover 240, a rear cover 242, and a sheet protector 210.
  • a photo album 238 can have multiple sheet protectors 210 placed therein, each being single or double sided and holding photographs 234.
  • FIG. 12 is side of a double sided sheet protector 210 showing openings 244 at the position in the pockets where photographs 234 can be entered and withdrawn. Also shown in FIG. 12 is the central backing sheet 232 showing the separation between photographs placed in the pockets between the front transparent sheet 14 and the back ' transparent sheet 216.
  • Figure 13 is a front view of one of the pockets 246 with a photograph 234 mounted in a pocket of the sheet protector 210. Legends 236 may be added in ink on the outside of the sheet protector 210 to indicate, for example, the place where the photograph was taken, and the names of persons or objects in the photo.
  • the transparent sheet 212 is receptive to aqueous, solvent based and gel based ink, and the ink is also substantially water-fast once it has dried.

Abstract

A writable document protection assembly is formed of an envelope-like structure employing extructed transparent material formed of a base layer of non-soluble material, and an outer writable layer formed of a blend of non-water-soluble and water-soluble material. The document protection assembly may be folded over on itself to seal one side and two additional sides may be heat sealed closed, leaving one side open to receive the document to be protected. A reinforcing strip may be heat sealed into one edge of the assembly to receive punched holes to go into a binder. One of the many specific applications of the invention is a photograph sheet protector that protects one or more photographs. One or both surfaces of the photograph sheet protector receives and retains ink.

Description

WRITABLE DOCUMENT PROTECTOR ASSEMBLY
Field of the Invention
This invention relates to transparent sheet or document protectors.
Background of the Invention It is often desirable to provide protection for important documents or other materials.
Such protection has often been in the form of transparent envelopes or pockets which are closed on three sides but which have one side open to receive the material.
These document or sheet protectors are often formed of transparent sheet material such as polyolefin, specifically polypropylene sheet material. With documents or other material within the sheet protector, it would be desirable to be able to write on the transparent plastic and make notes relative to the visible material within the document protector. However, polypropylene and most other transparent plastic materials do not readily accept writing with a pen or the like.
To overcome this problem, it has been proposed to apply a topcoat layer using a solvent which is removed by drying, leaving an ink receptive coating. However, such top coats often lack durability and can flake off and in some cases interfere with the manufacturing steps involved in the formation of the document protector.
Summary of the Invention In accordance with one aspect of the invention, an ink writable transparent document protector is formed by a co-extrusion process in which water-insoluble plastic, such as polypropylene, is co-extruded with a blend of water-insoluble material and water-soluble material, thereby forming an integral transparent film that is writable and that has good mechanical properties. The resultant film is formed into an envelope or pocket, and subsequently one can write on the document protector using virtually any kind of ink.
In one preferred embodiment, a large sheet of the co-extruded material is folded over to form an envelope, and two of the three remaining edges are heat bonded together to form the document protector, closed on three sides and open on the fourth side. This configuration permits the insertion of a sheet, such as a document, photograph, or any other material requiring protection. The document protection assembly may be provided with reinforcing along one edge, and holes to facilitate mounting in a ring binder. For reinforcing, an additional strip of plastic sheet material may be heat sealed into the edge of the document protector, thereby providing three plastic layers through which the holes are made to increase the strength at this vulnerable area.
The sheet protectors are also suitable for use in photo albums where the pages may include writable transparent pockets for receiving photos.
Now, returning to the extruded sheet material per se and as mentioned above, reference is made to U.S. Patent Application Serial No. 09/547,942, filed April 11, 2000, with this prior application being incorporated into this application in its entirety by reference.
One particular embodiment of the present invention is a photograph sheet protector having one or more pockets in which photographs may be inserted. The end-user may write on one or both exterior surfaces of the sheet protector without damaging the photograph.
Embodiments of the document protector made as described above are of high strength, and specific embodiments may be receptive to virtually any kind of ink and be fully transparent.
Other objects, features, and advantages of the invention will become apparent from a consideration of the following detailed description and from the accompanying drawings.
Brief Description of the Drawings Fig. 1 is a plan view of an illustrative embodiment of the invention;
Fig. 2 is a cross-sectional view taken along line 2-2 of Fig. 1 ; Fig. 3 is a cross-sectional view of sheet material which may be employed to form the sheet protector of Fig. 1;
Fig. 4 is a cross-sectional view of an alternative sheet construction; Fig. 5 is a schematic showing of a co-extrusion apparatus for forming the sheet material of Figs. 3 or 4;
Fig. 6 shows sheet protector arrangements illustrating the invention used in a photo album;
Fig. 7 is a cross-sectional view taken along line 7-7 of Fig. 6; Fig. 8 is a schematic showing of one of the photos of Fig. 6 with notes on the sheet protector; Fig. 9 is a plan view of a sheet protector having pockets for placing photographs and other documents therein;
Fig. 10 is a cross-sectional view of the sheet protector of Fig. 9;
Fig. 11 is a photo album having a sheet protector with photographs placed in pockets;
Fig. 12 is a side view of a double-sided sheet protector showing pockets on either side of the sheet protector for holding photographs; and
Fig. 13 is a schematic showing of one pocket holding a photograph and having notes written on the sheet protector.
Detailed Description of Preferred Embodiments
Returning more particularly to the drawings, Figure 1 is a plan view of a sheet protector 10, which includes an upper transparent plastic sheet 12 and a lower transparent plastic sheet 14. These two sheets may be formed from a single sheet folded over at the outer edge 16, or alternatively can be made of two overlying sheets. The sheet protector 10 may be open at the top edge, as shown in Figure 1, but may be heat sealed along the lower edge 18 and may be heat sealed along lines 20 and 22 with an extra reinforcing strip 24 mounted between the thermo- sealing lines 20 and 22. The reinforced left edge of the sheet protector 10 may be provided with three or more holes 26 for convenience in mounting the sheet protector into a three-ring binder. The heat sealing may be accomplished by applying a heated die to the double layer material. The heat sealing may be in the form of a series of welds with spaces between the welds to allow for the easy insertion of sheet material. Instead of thermal bonding, the edges may be secured together in any desired manner, by high frequency welding, by a thin line of permanent adhesive, or by other known techniques. Concerning the size of the sheet protector, one sample sheet protector was approximately nine inches in width and about 11-1/8 inches in its longer dimension. The reinforcing strip 24 was about 3/8 inch wide. The pocket was large enough to receive an unfolded sheet, 8lΛ inches by 11 inches in size. Each of the co-extruded sheets was about 3 or 4 mils thick.
Referring back to Figure 1 of the drawings, within the sheet protector 10 is shown a letter 32 protected from damage by the sheet protector 10. Written on the outer surface of the sheet protector in ink are certain legends 34 calling attention to certain passages or parts of the letter 32. Thus, by using the writable sheet protector of Figure 1, comments may be made relative to the letter 32 without defacing the letter itself. Subsequently, if desired, the original letter 32 may be withdrawn from the envelope.
Figures 3 and 4 are detailed cross-sectional views indicating the implementation of the transparent sheet material employed in the sheet protector of Figures 1 and 2 of the drawings. More specifically, referring to Figure 3, the sheet material 42 may include a base layer 44 of transparent plastic which is water insoluble, such as polypropylene. The upper layer 46, which is co-extruded with the lower layer 44 is a writable layer and may be a blend of non- water-soluble material and water-soluble material, such as a blend of poly vinyl alcohol and polypropylene or of polyalkyl oxazaline and a polyolefin, such as polypropylene. Concerning Figure 4, this shows a three-layer assembly of transparent plastic materials involving a water-insoluble base layer 52, a writable layer 54, which is made up of a blend of non- water-soluble and water-soluble polymeric material, with an intermediate layer 56, which is provided to help bond the upper and lower layers 52 and 54 to one another when they are being co-extruded. Figure 5 is a schematic block diagram illustrating the co-extrusion process. In Figure 5, the materials to be co-extruded are provided in the input containers 62" and 64, with the input container 66 being provided in cases where a three-layer transparent laminate is being formed. The upper container 62 may contain heated material for forming the writable top layer, while the container 64 may contain the heated plastic material for forming the water insoluble lower layer of the laminate. Heated material from container 62 and 64, and also 66 when an intermediate layer is desired, are fed to the feed block 68 and the die 70, which extrude the multiple-layer heat material 72, which is eventually wound up onto a reel 74.
Figures 6, 7, and 8 of the drawings show another use of the present invention. More specifically, referring to Figure 6, a photo album 82 is provided with a front cover 84, a rear cover 86, and pages which are formed of transparent pockets 88 mounted on a paper or a light card page sheet 90. Each of the pockets 88 include an inner layer 92 and an outer layer 94 which is writable. The inner layer 96 may be fastened to the supporting page 90. Alternatively, instead of being mounted on the page 90, the sheet protectors themselves may be the pages of the photo album with these transparent pages being bound directly into the photo album or through mounting arrangements such as removable screws or the rings of a three-ring binder. Figure 8 is a front view of one of the pockets 88 with a photograph 100 mounted in the document protector. Legends 102 and 104 may be added in ink on the outside of the document protector to indicate the place where the photograph was taken, and the names of persons or objects in the photo. Now, for completeness, a portion of the specification of the prior cited patent application relative to the sheet material per se will now be explicitly included in the present patent application.
Ink receptive substrates to be employed as the sheet material comprise a base layer formed from a water-insoluble thermoplastic polymer, and an ink receptive layer disposed over the base layer. The ink receptive layer is formed from a melt processable blend of a water- soluble polymer and a substantially water-insoluble polymer, and provides an inherently ink receptive surface without further surface treatment. A tie layer can optionally be interposed between base and ink receptive layer.
The base layer is selected from the group of thermoplastic material consisting of polyolefins, polyesters, polyurethanes, poly vinyl chlorides, polyamides, polystyrene, ethylene vinyl alcohol, and mixtures thereof. The ink receptive blend comprises in the range of from 20 to 80 percent by weight water-soluble polymer, and in the range of from 20 to 80 percent by weight substantially water-insoluble polymer based on the total weight of the blend. The blend may include an optional compatibilizing agent that is chemically compatible with both the water- soluble polymer and the substantially water-insoluble polymer.
The blend has a melting temperature in the range of from about 100 to 600°F. The water- soluble polymer component of the blend is selected from the group of compounds consisting of polyvinyl alcohols, polyalkyl oxazolines, polyphenyl oxazolines, polyvinyl pyrrolidones, polyacrylic-acids, polymethyl methacrylates, polymethyl methacrylic-acids, styrene maleic anhydrides, alkyl celluloses, carboxyalkyl celluloses, hydroxyalkyl celluloses, polyethylene oxides, polyethylene-imines, and mixtures thereof.
Preferred water-soluble polymers include polyalkyl oxazoline and polyvinyl alcohol. The substantially water-insoluble polymer component of the blend is selected from the group of polyolefins consisting of modified and unmodified polyesters, polypropylenes, polyethylenes, polystyrenes, polybutylenes, and copolymers and mixtures thereof. In a preferred embodiment, the base layer and ink receptive layer of ink receptive substrates are formed simultaneously by co-extrusion process. Ink receptive substrates can include the ink receptive layer on one or both surfaces of the base layer, and/or can be constructed in the form of a pressure-sensitive adhesive label, i.e., with a pressure-sensitive adhesive material disposed on a surface of the base layer opposite the ink receptive layer.
The ink receptive substrates are inherently ink receptive in that they avoid that need for top-coating or reliance on a voided microstructure to gain ink receptivity. The ink receptive substrates provide properties of image quality and optics that are superior to those provided by substrates having voided microstructures. The ink receptive substrates are fabricated in a manner that avoids the need for multiple time-consuming and costly process steps.
Considering now one example of a specific embodiment of the invention, the sheet protector may be a writable assembly for protecting photographs. Generally speaking, one of the many embodiments of this invention relates to embodiments of writeable photo pages. The pages are one or two-sided photograph-holding, pocketed sheet structures that include two generally clear sheets, and a backing or central sheet that is typically white or opaque. The page includes an area for holding at least one photograph. In many embodiments, each clear sheet is subdivided into a series of areas for holding photographs. The pockets are preferably rectangular, but may be other shapes. A series of strips or other areas act as borders surrounding the photo pockets. The strips are typically not as wide as the photo pockets. In many embodiments of the invention, the clear sheeting permits writing with water- based writing instruments, such as ball-point pens and roller-ball pens, and/or other writing instruments with solvent-based or other ink, and/or inkjet or other printers.
In one embodiment, the photo pages include two sheets of coextruded ERSA material, as described above. A central backing sheet of white polyester film is interposed in between the two clear sheets. Photo pockets and marginal areas are defined by weld lines, which may be formed by conventional methods known in the art.
The outer surface of one or both sheets is adapted to receive and retain writing from a writing instrument, and may alternatively receive printing from a printer, such as from an inkjet printer. For example, the writable photo pages may permit the user to inscribe both the clear sheeting over the photographs, and the border areas of the clear sheeting, to illustrate, one might circle an area of a landscape photograph and write in the margin, "This is where we intend to build our new home."
While one specific embodiment relates to holding and protecting photographs, alternative embodiments may hold business cards, trading cards, or the like, rather than photographs. Considering now specific embodiments, and referring to Figures 9 - 13, Figure 9 is a plan view of a sheet protector 210, which is formed from a transparent sheet 212. The sheet protector 210 is double-sided, as shown in FIG. 12, and includes a front transparent sheet 214 and a back transparent sheet 216 formed from the transparent plastic sheet 212. These first and second sheets 214 and 216 may be formed from the transparent sheet 212 by folding the transparent sheet 212 over at the outer edge 218. In an alternative embodiment, the double-sided sheet protector 210 can be made of two separate, overlying transparent sheets to form front and back transparent sheets 214 and 216.
The sheet protector 210 may be open near the top edge, as shown in FIG. 9, for placing documents in the sheet protector 210. The sheet protector 210 may also be heat sealed along the lower edge 220 and may be heat sealed along lines 222 and 224 with an extra reinforcing strip 226 mounted between the thermo-sealing lines 222 and 224. The reinforced left edge 228 of the sheet protector 210 may be provided with one or more holes 30 for convenience in mounting the sheet protector 10 into a ring binder.
FIG. 9 shows one embodiment in which the sheet protector 210 is configured to hold two photographs on a side of the sheet protector 210. In an additional embodiment, the sheet protector 210 is configured to hold three or more photographs on a side. It should be understood that the sheet protector 210 can be configured to hold multiple photographs of varying sizes on each side. Any number of pockets may also be used on each side, such that consumers can use different sheet protectors 210 depending on the size of their photographs, or on the number of photographs they wish to display on a given side of the sheet protector 210.
FIG. 10 is cross-sectional view of the sheet protector 210, also includes a backing sheet 232 positioned between the front transparent sheet 214 and the back transparent sheet 216. The backing sheet 232 may be an opaque sheet made from polypropylene material. The backing sheet 232 is placed the front and back transparent sheets 214 and 216 to provide a separation layer such that different documents can be placed between the front transparent sheet 214 and the backing sheet 232, and between the back transparent sheet 16 and the backing sheet 232. Heat sealing of the front and back transparent sheets 214 and 216 may be accomplished by applying a heated die to the double layer material. The heat sealing may be in the form of a series of welds with spaces between the welds to allow for the easy insertion of sheet material. Instead of thermal bonding, the edges may be secured together in any desired manner, by high frequency welding, by a thin line of permanent adhesive, or by other known techniques. The size of the sheet protector may vary depending on the size of the document or photograph to be placed therein. For example, one sheet protector is approximately nine inches in width and about 11-1/8 inches in its longer dimension. The reinforcing strip 24 is about 3/8 inch wide. The pocket is large enough to receive an unfolded sheet, 8 2 inches by 11 inches in size. Each of the co-extruded sheets was about 3 or 4 mils thick. In another embodiment, the sheet protector is the size of a conventional photo album. Multiple pockets may be formed on the sheet protector for holding several photographs per page. Pocket size is large enough to hold standard photographs, such as for example a 3 inch by 5 inch photograph.
Referring back to the drawings, within the sheet protector 210 a photograph 234 can be placed to be protected from damage by the sheet protector 210. Written on the outer surface of the sheet protector in ink are certain legends 236 calling attention to certain parts of the photograph 234. Thus, by using the writable sheet protector of the present invention, comments may be made relative to the photograph 234 without defacing the photograph itself. Subsequently, if desired, the original photograph 234 may be withdrawn from the sheet protector 210. Note from Figures 9-13 that multiple photographs may be placed in the sheet protector 210 and that different legends 236 can be made upon the sheet protector 210 regarding different photographs 234 placed the various pockets of the sheet protector 210.
The material used to make the transparent sheet 212 may include a base layer of transparent plastic which is water insoluble, such as polypropylene. The upper layer, which may be co-extruded with the lower layer, is a writable layer and may be a blend of non- water-soluble material and water-soluble material, such as a blend of polyvinyl alcohol and polypropylene or of polyalkyl oxazaline and a polyolefin, such as polypropylene. An intermediate layer may also be used to help bond the upper and lower layers to one another when they are being co-extruded. In another embodiment, ink receptive substrates to be employed as the sheet material comprise a base layer formed from a water-insoluble thermoplastic polymer, and an ink receptive layer disposed over the base layer. The ink receptive layer may be formed from a melt processable blend of a water-soluble polymer and a substantially water-insoluble polymer, and provides an inherently ink receptive surface without further surface treatment. A tie layer can optionally be interposed between base and ink receptive layer.
The base layer may be selected from the group of thermoplastic material consisting of polyolefins, polyesters, polyurethanes, polyvinyl chlorides, polyamides, polystyrene, ethylene vinyl alcohol, and mixtures thereof. The ink receptive blend comprises in the range of from 20 to 80 percent by weight water-soluble polymer, and in the range of from 20 to 80 percent by weight substantially water-insoluble polymer based on the total weight of the blend. The blend may include an optional compatibilizing agent that is chemically compatible with both the water- soluble polymer and the substantially water-insoluble polymer.
The blend has a melting temperature in the range of from about 100 to 600°F. The water- soluble polymer component of the blend is selected from the group of compounds consisting of polyvinyl alcohols, polyalkyl oxazolines, polyphenyl oxazolines, polyvinyl pyrrolidones, polyacrylic-acids, polymethyl methacrylates, polymethyl methacrylic-acids, styrene maleic anhydrides, alkyl celluloses, carboxyalkyl celluloses, hydroxyalkyl celluloses, polyethylene oxides, polyethylene-imines, and mixtures thereof.
Preferred water-soluble polymers include polyalkyl oxazoline and polyvinyl alcohol. The substantially water-insoluble polymer component of the blend is selected from the group of polyolefins consisting of modified and unmodified polyesters, polypropylenes, polyethylenes, polystyrenes, polybutylenes, and copolymers and mixtures thereof.
In one embodiment, the base layer and ink receptive layer of ink receptive substrates are formed simultaneously by co-extrusion process. Ink receptive substrates can include the ink receptive layer on one or both surfaces of the base layer, and/or can be constructed in the form of a pressure-sensitive adhesive label, i.e., with a pressure-sensitive adhesive material disposed on a surface of the base layer opposite the ink receptive layer.
The ink receptive substrates are inherently ink receptive in that they avoid the need for top-coating or reliance on a voided microstructure to gain ink receptivity. The ink receptive substrates provide properties of image quality and optics that are superior to those provided by substrates having voided microstmctures. The ink receptive substrates are fabricated in a manner that avoids the need for multiple time-consuming and costly process steps. FIG. 11 shows another embodiment of the present invention. A photo album 238 is provided with a front cover 240, a rear cover 242, and a sheet protector 210. A photo album 238 can have multiple sheet protectors 210 placed therein, each being single or double sided and holding photographs 234. FIG. 12 is side of a double sided sheet protector 210 showing openings 244 at the position in the pockets where photographs 234 can be entered and withdrawn. Also shown in FIG. 12 is the central backing sheet 232 showing the separation between photographs placed in the pockets between the front transparent sheet 14 and the back' transparent sheet 216. Figure 13 is a front view of one of the pockets 246 with a photograph 234 mounted in a pocket of the sheet protector 210. Legends 236 may be added in ink on the outside of the sheet protector 210 to indicate, for example, the place where the photograph was taken, and the names of persons or objects in the photo. The transparent sheet 212 is receptive to aqueous, solvent based and gel based ink, and the ink is also substantially water-fast once it has dried. In closing, the foregoing detailed description and drawing relate to preferred embodiments of the invention. However, it is to be understood that various modifications can be made without departing from the spirit and scope of the invention. Thus, by way of example and not of limitation, other sheet protectors may be formed in addition to those shown in Figs. 1, 2, and 6 through 8. Also, the thickness of each of the co-extruded layers may vary but are preferably between about 2 and 5 mils; and the sheet protectors may have varying sizes to hold 8 2 by 11 inch sheets, 8 by 14 inch sheets, and standard size photos, for photo album pages. In addition, other materials which perform substantially the same functions may be employed to form co-extruded writable document protectors. Accordingly, the present invention is not limited to the embodiments described in detail hereinabove and shown in the drawings.
JO-

Claims

What is claimed is:
1. A writable sheet protector comprising: an envelope type assembly formed of transparent co-extruded sheet material including a water-insoluble polymer base layer and an inherently writable outer layer which is a blend of a water-soluble polymer and a substantially water-insoluble polymer forming an ink receptive surface without further surface treatment; said sheet material being folded over to form one sealed edge of the envelope and being heat sealed along two additional edges with one edge of the envelope type assembly being open to receive a document or other sheet material; a reinforced edge of said envelope type assembly including an additional strip of plastic heat bonded into one edge of said assembly; and holes through said reinforced edge for securing said assembly into a binder.
2. A writable sheet protector as defined in claim 1, further comprising ink writing on the surface of said sheet protector.
3. A writable sheet protector as defined in claim 1 wherein said additional strip is substantially opaque.
4. A writable sheet protector comprising: an envelope type assembly formed of transparent co-extruded sheet material including a water-insoluble polymer base layer and an inherently writable outer layer which is a blend of a water-soluble polymer and a substantially water-insoluble polymer forming an ink receptive surface without further surface treatment; and said sheet material being sealed along three edges with one edge of the envelope type assembly being open to receive a document or other sheet material.
5. A writable sheet protector as defined in claim 4, further comprising ink writing on the surface of said sheet protector.
6. A writable sheet protector as defined in claim 4 wherein an additional apertured opaque reinforcing strip is provided along one edge of said sheet protector.
7. A writable sheet protector as defined in claim 4 wherein said base layer is polypropylene, and said outer layer is formed of a blend of polyalkyl oxazaline and a polyolefin.
8. A writable sheet protector assembly as defined in claim 4 wherein said envelope is thermally sealed.
9. A writable sheet protector as defined in claim 4 wherein a printed document is enclosed within the sheet protector.
10. A writable sheet protector as defined in claim 4 wherein a photograph is enclosed , within said sheet protector.
11. A writable sheet protector as defined in claim 4 wherein one of said edges is sealed by folding said co-extruded sheet material, with the same sheet forming both an upper and a lower layer of said assembly.
12. A writable sheet protector comprising: an envelope type assembly formed of co-extruded sheet material including a water-insoluble base layer and an inherently writable outer layer forming an ink receptive surface without further surface treatment; and said sheet material being sealed along three edges with one edge of the envelope type assembly being open to receive a document or other sheet material.
13. A writable sheet protector as defined in claim 12, further comprising ink writing on the surface of said sheet protector.
14. A writable sheet protector as defined in claim 12 wherein an additional apertured opaque reinforcing strip is provided along one edge of said sheet protector.
15. A writable sheet protector as defined in claim 12 wherein said base layer is polypropylene, and said outer layer is formed of a blend of polyalkyl oxazaline and a polyolefin.
16. A writable sheet protector assembly as defined in claim 12 wherein said envelope is thermally sealed.
17. A writable sheet protector as defined in claim 12 wherein a printed document is enclosed within the sheet protector.
18. A writable sheet protector as defined in claim 12 wherein a photograph is enclosed within said sheet protector.
19. A writable sheet protector as defined in claim 12 wherein said sheet protector is transparent, and wherein said upper layer is formed of a blend of between about 20% and 80% of a water-insoluble polymer, and between about 20% and 80% of a water-soluble polymer.
20. A writable sheet protector as defined in claim 12 wherein the sheet protector has an inner pocket which is slightly greater than 8 4 inches by 11 inches, to receive standard size sheets.
21. A writable transparent sheet protector for displaying photographs, comprising: a transparent sheet of co-extruded polymer forming a front transparent sheet; a transparent sheet of co-extruded polymer forming a back transparent sheet; a backing sheet positioned between the front and the back transparent sheets; and at least one defined area on at least one of the front and the back transparent sheets defining a pocket for placing a photograph therein, wherein the sheets are markable with a writing instrument such that the photograph placed within the pocket is not damaged by ink from the writing instrument.
22. The sheet protector of claim 21 , wherein the front and back transparent sheets form a double-sided sheet protector, each side having a writable surface.
23. The sheet protector of claim 22, further comprising a reinforced edge of the front and back transparent sheets formed by an additional strip of plastic that is heat bonded into at least one sealed edge of the front and back transparent sheets.
24. The sheet protector of claim 23, wherein the additional strip is substantially opaque.
25. The sheet protector of claim 22, wherein the opaque backing sheet is made of polypropylene material.
26. The sheet protector of claim 22, wherein the opaque backing sheet allows photographs to be placed in pockets between the front transparent sheet and the backing sheet and between the back transparent sheet and the backing sheet, such that photographs are placeable on both sides of the double-sided sheet protector.
27. The sheet protector of claim 22, wherein a sheet of co-extruded polymer is folded over to form said front sheet and said back sheet.
28. The sheet protector of claim 22, wherein said front sheet and said back sheet are separate sheets sealed together in certain areas.
29. A writable transparent sheet protector as defined in claim 22, wherein the sheet protector further comprises a plurality of defined areas on the front and on the back sheets defining multiple pockets for placing photographs therein.
30. A writable transparent sheet protector as defined in claim 22, wherein the backing sheet is opaque.
44-
PCT/US2001/043492 2000-11-10 2001-11-13 Writable document protector assembly WO2002038369A1 (en)

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Applications Claiming Priority (2)

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US71058100A 2000-11-10 2000-11-10
US09/710,581 2000-11-10

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Cited By (2)

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GB2405616A (en) * 2003-09-06 2005-03-09 Michael B Gott A route finder/planner kit
EP3323626A1 (en) 2016-11-18 2018-05-23 INTER-FOLIA Sp. z o.o. Method for producing a reinforcement of punched fragment of plastic pocket for documents

Citations (3)

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Publication number Priority date Publication date Assignee Title
US4154344A (en) * 1976-11-09 1979-05-15 Minnesota Mining And Manufacturing Company Material for forming envelopes used to protect electronic components
US4356099A (en) * 1980-05-16 1982-10-26 Lever Brothers Company Fabric treatment products
US5042841A (en) * 1990-02-22 1991-08-27 Friedman Michael N Combined cover and storage compartment for a ring binder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4154344A (en) * 1976-11-09 1979-05-15 Minnesota Mining And Manufacturing Company Material for forming envelopes used to protect electronic components
US4356099A (en) * 1980-05-16 1982-10-26 Lever Brothers Company Fabric treatment products
US5042841A (en) * 1990-02-22 1991-08-27 Friedman Michael N Combined cover and storage compartment for a ring binder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2405616A (en) * 2003-09-06 2005-03-09 Michael B Gott A route finder/planner kit
GB2405616B (en) * 2003-09-06 2005-09-14 Michael B Gott Route finder/planner
EP3323626A1 (en) 2016-11-18 2018-05-23 INTER-FOLIA Sp. z o.o. Method for producing a reinforcement of punched fragment of plastic pocket for documents

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