Classifications

• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
  • E06B9/52—Devices affording protection against insects, e.g. fly screens; Mesh windows for other purposes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
  • C08L23/10—Homopolymers or copolymers of propene
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
  • C08L23/10—Homopolymers or copolymers of propene
  • C08L23/12—Polypropene
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
  • C09K19/00—Liquid crystal materials
  • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
  • C09K19/38—Polymers
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
  • C09K19/00—Liquid crystal materials
  • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
  • C09K19/54—Additives having no specific mesophase characterised by their chemical composition
  • C09K19/542—Macromolecular compounds
  • C09K19/544—Macromolecular compounds as dispersing or encapsulating medium around the liquid crystal
• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
  • E06B9/52—Devices affording protection against insects, e.g. fly screens; Mesh windows for other purposes
  • E06B2009/527—Mounting of screens to window or door

Definitions

• the invention relates to an insect screen for screening a
• the insect screen being provided with a sheet of gauze material having two opposite longitudinal edges and at least two retaining sections for retaining the two opposite longitudinal edges to the constructional opening.
• insects screens are known as fixed type where the gauze material is connected to a circumferential frame.
• insect screens of a roll-up type where the gauze material is movably included and by opposite longitudinal edges thereof is guided in side guides. The gauze material can then be rolled up in a top housing.
• the roll-up insect screens are normally provided with a bottom rail.
• the side guides and the top housing are often permanently attached to a window frame.
• Insect screens of the fixed type are often removably attached in a window frame so that they can be stored during winter months.
• a recurring problem with insect screens are the connections of the screen gauze material to other components of the insect screen, such as circumferential frames, roll -up devices, bottom rails and/or side guides.
• the most commonly used screen gauze material is a PVC-layer (polyvinyl chloride) -coated woven from glass fibre.
• This material is supplied by, inter alia, the firm of Phifer Wire Products, Inc, from Tuscaloosa, Alabama, USA. This material allows only limited bending or folding, because otherwise the encased glass fibres break. As a result of pressing the screen gauze with a spline into a mounting groove, such fibre breakages often occur, but they are generally tolerated because in practice they have little effect on the utility of the connection.
• Another drawback, however, is that as the spline is rolled in, the position and the tension of the screen gauze changes, so that the gauze attachment becomes uneven.
• the object of the invention is to provide a solution to these problems. Accordingly, it is also an object of the present invention to eliminate or ameliorate at least one of the disadvantages of the state of the art. It is another object of the present invention to provide alternative solutions that can be carried out more simply and that, furthermore, can be manufactured comparatively economically. Alternatively, it is an object of the invention to provide to the public an at least useful option.
• the invention provides an insect screen and a method for forming a welded connection as defined in one or more of the appended claims and subclaims.
• FIG. 1 shows an insect screen according to the invention of the fixed type
• Fig. 2 shows an insect screen according to the invention of the roll-up type
• Fig. 3 is a partial cross section of the fixed insect screen from Fig. 1;
• Fig. 4 is a cross section of an alternative wooden frame element for use in the invention; still without screen gauze;
• Fig. 5 shows a manufacturing step for the insect screen from Figs. 1,
• Fig. 6 is a partial cross section of the roll-up insect screen from
• Fig. 7 shows a manufacturing step of the insect screen from Figs. 2 and 6.
• a corner part is shown of a normally rectangularly framed insect screen 1.
• the insect screen 1 is assembled in the usual manner from hollow edge sections 3A, 3B which are mitred to form a corner 5 and to which a sheet of screen gauze, mesh material or screen material 7 is attached.
• the edge sections such as 3A and 3B, in the usual manner, a circumferential frame or framing is formed.
• the framing is to be placed in or in front of a window opening.
• the mitred edge sections 3A, 3B can be internally provided with a corner connector (not shown, but conventional). Further, it can be seen in Fig. 1 that the edge sections 3A, 3B are each provided with an undercut groove 9A, 9B, respectively.
• a spline or inlay 11 Received in these undercut grooves 9A, 9B is a spline or inlay 11 from polypropylene material.
• the polypropylene material for the spline 11 is one of the type in which a liquid crystalline polymer (LC-polymer) is incorporated that renders the polypropylene material UV-resistant.
• the sheet of screen gauze 7 is likewise woven from polypropylene fibres of the type whose UV-resistance has also been enhanced through addition of an LC-polymer.
• FIG. 2 a second embodiment of an insect screen 51 according to the invention is shown.
• the insect screen 51 is of the roll-up type with a roll in a top housing 53 and side guides in the form of side guide sections or side guide channels 55, of which only one is represented in Fig. 2.
• a roll-up sheet of screen gauze, or gauze material 57, respectively, is received by its longitudinal edges in the side guide section 55.
• the top end of the sheet of gauze material 57 is attached in the top housing 53 to a roll (not visible, but conventional) and has a lower edge attached to a bottom rail 59.
• the bottom rail 59 is guided in the side guides 55 and can be latched thereto in the closed position.
• the gauze material 57 is of polypropylene yarns which have been made UV-resistant through addition of a liquid crystalline polymer (LC-polymer).
• LC-polymer liquid crystalline polymer
• Fig. 3 is a cross section in partial view of an edge section 3A with a screen gauze 7 attached thereto.
• the screen gauze 7 is attached to the spline 11 through fusion, in the form of a welded connection 12.
• polypropylene material of the yarns of the screen gauze material 7 and the spline 11 are predominantly properly weldable without the visible side of the screen gauze 7 being damaged.
• the polypropylene material has become suitable for use in insect screens, which, as is known, are exposed to UV-radiation.
• the spline 11 has in cross section outwardly elastic arms 11 A, 11B which realize a snap connection with the undercut groove 9 A.
• Fig. 4 shows an edge section 13 from wood.
• the wooden edge section 13 is also provided with an undercut, for the most part circular, groove 19, which may be of circular design.
• a spline or inlay 21 may be snapped in or rolled in, which is formed from a polypropylene material with an addition of an LC-polymer for obtaining the desired UV-resistance.
• a screen gauze material from UV-resistant polypropylene yarns can be welded.
• This screen gauze material is not shown in Fig. 4 but is basically identical to the gauze material 7 shown in Figs. 1 and 3. After fusion with the gauze material, the spline 21 can take a flattened shape so that the part that projects above the groove 19 is no longer round.
• Fig. 5 shows a manufacturing step for obtaining the insect screens of the fixed type, to which Figs. 1, 3 and 4 relate.
• the framing built up from edge sections, here indicated with reference numeral 3, is first provided with the inlay or spline 11.
• the screen material 7 then is not attached yet and is laid as a sufficiently large sheet on top of the framing 3 with the inlay 11 laid therein.
• the screen gauze 7 can then be held stretched under tension.
• an anvil 31 of a heat press is brought into contact with the top of the screen gauze 7.
• the heat press installation can utilize heat, high frequency or other suitable welding techniques to fuse the screen gauze 7 with the sphne inlay 11.
• a cross section in partial view is shown of a side guide 55 from Fig. 2 having received therein a longitudinal edge 61 of the screen gauze 57.
• the longitudinal edge 61 is formed by folding the screen gauze material 57 in part back onto itself and connecting it through welding or melting and having a more inwardly situated edge thereof form an upwardly springing hook edge 63.
• this upwardly springing hook edge 63 is pressed against the polypropylene gauze material 57 but upon unrolling springs clear of the underlying gauze material 57.
• this hook edge 63 is caught behind a diagonally inwardly directed resilient strip 65.
• the resilient strip 65 is received in a dovetail groove 67 of the side guide section 55.
• This hook edge 63 forms the retaining means for retaining each of the at least two opposite longitudinal edges 61 to an associated one of the side guide sections 55 present at least in duplicate.
• the screen gauze 75 cannot dislodge from the side guide by wind or bumping. In the event of an unduly high load the screen gauze can still slip out of the side guide, but it can thereupon be re-placed again by the end user without damage. It is again the advantageous welding possibility of the polypropylene (PP) gauze that makes this solution possible.
• PP polypropylene
• a method step is shown by which the longitudinal edge 61 can be obtained.
• What is achieved by utilizing an anvil 71 of a heat press that is placed directly on the turnover fold 69 is, in addition to fusion of the polypropylene material, that the turnover fold obtains a permanent form.
• a reinforced band is obtained with which the rolling screen remains well rollable and the increase in roll-up diameter remains limited.
• the strengthened outer edge with the upstanding hook edge 63 provides a proper restraint from slipping out of the side guide.
• a screen gauze from UV-stable polypropylene yarns is used.
• These UV-resistant PP-yarns are obtained by adding to the PP material an LC-polymer of a suitable type.
• a suitable type of LC-polymer concerns a polymer whose form changes under the influence of heat and pressure.
• the polymer forms a surface film that is sunlight resistant and protects the underlying material.
• Such PP-materials are known from the article: "Osaka researchers develop light-resistant

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Structural Engineering (AREA)
• Medicinal Chemistry (AREA)
• Crystallography & Structural Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Health & Medical Sciences (AREA)
• Polymers & Plastics (AREA)
• Insects & Arthropods (AREA)
• Pest Control & Pesticides (AREA)
• Architecture (AREA)
• Life Sciences & Earth Sciences (AREA)
• Civil Engineering (AREA)
• Laminated Bodies (AREA)
• Catching Or Destruction (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Family Cites Families (10)

• 2009
  • 2009-11-19 NL NL2003830A patent/NL2003830C2/nl not_active IP Right Cessation
• 2010
  • 2010-11-19 WO PCT/NL2010/050775 patent/WO2011062492A1/en active Application Filing
  • 2010-11-19 EP EP10787572A patent/EP2501757A1/en not_active Withdrawn

Non-Patent Citations (1)

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