CA2472836A1 - Fastener for holding two sheets of flexible material to a frame - Google Patents

Fastener for holding two sheets of flexible material to a frame Download PDF

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Publication number
CA2472836A1
CA2472836A1 CA002472836A CA2472836A CA2472836A1 CA 2472836 A1 CA2472836 A1 CA 2472836A1 CA 002472836 A CA002472836 A CA 002472836A CA 2472836 A CA2472836 A CA 2472836A CA 2472836 A1 CA2472836 A1 CA 2472836A1
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CA
Canada
Prior art keywords
retainer member
channel
retainer
side portions
flexible sheet
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.)
Granted
Application number
CA002472836A
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French (fr)
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CA2472836C (en
Inventor
Mitchell David Young
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CA2472836A priority Critical patent/CA2472836C/en
Publication of CA2472836A1 publication Critical patent/CA2472836A1/en
Application granted granted Critical
Publication of CA2472836C publication Critical patent/CA2472836C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/06Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips
    • F16B5/0692Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining flexible sheets to other sheets or plates or to strips or bars
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H15/00Tents or canopies, in general
    • E04H15/32Parts, components, construction details, accessories, interior equipment, specially adapted for tents, e.g. guy-line equipment, skirts, thresholds
    • E04H15/64Tent or canopy cover fastenings
    • E04H15/642Tent or canopy cover fastenings with covers held by elongated fixing members locking in longitudinal recesses of a frame
    • E04H15/646Tent or canopy cover fastenings with covers held by elongated fixing members locking in longitudinal recesses of a frame the fixing members being locked by an additional locking member
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25Greenhouse technology, e.g. cooling systems therefor

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)

Abstract

A fastener for securing first and second sheets of flexible material to a support comprises a channel member and a first retainer member having side portions adapted to fit inside the channel member for holding the first flexible sheet against opposed sides of the channel member. The first retainer member also provides an inner channel, and a second, inner retainer member is adapted to fit inside this inner channel for holding the second sheet of material between outer sides of the inner retainer member and side portions of the first retainer member.
Removal of the second retainer member allows the second flexible sheet to be removed while the first flexible sheet remains in place. when the second retainer member is in place it provides an expansive force on the side portions of the first retainer member for enhanced gripping of the first flexible sheet.

Description

Title: Fastener for holding two sheets of flexible material to a frame.
Background of the Invention.
l.Field of the Invention The present invention relates to a fastener assembly for holding two sheets of flexible material, for example a mesh screen and a plastic sheet, to a support such as a frame of a greenhouse or gazebo.
2.Prior Art There is a need, for example in greenhouses and gazebos, to have, on occasion, two sheets of flexible material. One sheet may be an apertured screen for protection against insects, and for cold weather an impervious sheet of plastic may be added to exclude cold air. Some fastening assemblies have been designed so that two or more such sheets can be held in a semi-independent manner, i.e. they allow an outer sheet, for example the plastic sheet, to be added or removed without disturbing the inner sheet. Such assemblies are shown for example in the following U.S. patents:
4,467,504, issued Aug.28, 1984 to Quist;
4,682,642, issued July 28, 1987 to Hogshead III et al.
4,726,411, issued Feb.23, 1988 to Conley;
4,769,877, issued Sept.l3, 1988 to Conley, and 6,314,684, issued Nov.l3, 2001 to Aviram.
Summary of the Invention The present invention provides a fastener capable of holding two flexible sheets in semi-independent manner, to allow removal of an outer sheet without disturbing an inner sheet, .. : . 4 which is simple in construction and in which enhanced gripping of the inner sheet occurs by cooperation with the retainer for the outer sheet.
In accordance with the present invention, a fastener for securing first and second sheets of flexible material to a support and for allowing one of said sheets to be removed while another sheet remains secured, comprises:
a channel member having opposed sides and which is attachable to said support, a first retainer member having side portions adapted to fit inside said channel member for holding said first flexible sheet between its side portions and said opposed sides of the channel member, said first retainer member also providing an inner channel between inside surfaces of said side portions, said inside surfaces including at least one undercut, inwardly diverging side surface, and a second, inner, retainer member adapted to fit at least partially inside said inner channel for holding said second sheet of flexible material between outer sides of said inner retainer member and said inside surfaces of said side portions of said first retainer member, said second retainer member having at least one outwardly diverging side surface adapted to engage said undercut, inwardly diverging side surface of said inner channel, whereby removal of said second retainer member allows the second flexible sheet to be removed while said first flexible sheet remains in place, and whereby when said second retainer member is in place it provides an expansive force on said side portions of the first retainer member for enhanced gripping of said first flexible sheet against the opposed sides of the channel member.

Preferably, each of the inner surfaces of the first retainer member has an undercut, inwardly diverging side surface, and the second retainer member has both of its side surfaces outwardly diverging to engage the side surfaces of said first retainer member.
The channel member, the first retainer member, and the second retainer member may be part of a kit of parts which include an alternate retainer member which can be used in place of the first retainer member when the parts are to be used for only the first flexible sheet, the alternate retainer member having side portions adapted to fit inside said channel member and having enhanced rigidity compared to the first retainer member.
The sides of the channel member may have inner surfaces provided with longitudinal ridges. Also, the channel member may be formed as one of a pair of similar channel members which are joined by a web having a line of weakening allowing the channel members to be used either as a dual track pair, or singly after severing along said line of weakening.
Brief Description of the drawings.
A preferred embodiment of the invention will now be described by way of example with reference to the accompanying drawings, in which;
Fig.l is a cross-section through the complete fastener assembly, as mounted on a support;
Fig. la is a similar view showing the first retainer member being inserted into the channel member to hold the first flexible sheet;
Fig.lb is a similar view of the complete fastener parts with the second retainer member being inserted into the first retainer member to hold the second flexible sheet;
Fig.2 is a detailed cross-section through the first retainer member;
Fig.2a shows a detail of the first retainer member;
Fig.3 is a cross-section through the second or inner retainer member;
Fig.4 is a cross-section through an alternate first retainer member;
Fig.5 is a view of the alternate assembly using the alternate first retainer member;
Fig.5a is a view showing the alternate first retainer member being inserted into the channel member, and Fig.6 is a cross-section through a pair of channel members as extruded.
Detailed Description.
As shown in Fig. l, the complete assembly includes a channel member 10 of extruded plastic material which is held onto a support S, typically the frame member of a greenhouse or gazebo, by screws 12 which penetrate the base 14 of the channel member.
The channel member 10 also has a flat flange 14a projecting from the base 14, and upstanding, opposed sides 16 terminating in undercut, inwardly projecting lips 16a. The sides of channel member 10 have longitudinal ridges 16b.
The marginal portion of flexible mesh screening material 18 is held within the channel member 10 by a first retainer member 20, also of extruded plastic, which is separately shown in Fig.2.
This latter member is itself of channel form, having a flat base 22, and upwardly extending side portions 24 which terminate in outwardly projecting flanges 25, one of which has an upwardly projecting outer rib 26. As shown in Fig.2a, the side portions 24 each have an upper recessed portion 24a which engages with the respective inwardly projecting lip 16a of the channel member. When the screen 18 has been inserted into the channel member, it can be retained by inserting the first retainer member 20 to hold the screen between the lips 16a and the recesses 24a, the parts having sufficient resiliency to allow this insertion. The insertion is shown in Fig. la.
As shown in Fig.2, the first retainer member 20 also has an inner channel formed between side portions 24, and these side portions have inner side surfaces 24b which are undercut and which diverge inwardly, i.e diverge towards the base 22 of the inner channel. These side surfaces thus provide means for holding a second, inner, retainer member 30, shown separately in Fig.3. This member 30, which is also extruded of plastic, has a flat top plate 32, and two depending webs 34. These webs have outer sides with outwardly diverging side surfaces 34a arranged to engage the undercut side surfaces 24b of the first retainer member.
With the channel member and first retainer member holding the screen 18, an additional layer of sheet material, such as a plastic sheet 36 shown in Fig.l, can be inserted into the channel provided by the first retainer member 20 and held in place by the second, inner retainer member 30, the webs 34 having sufficient resiliency to allow this. This insertion is shown in Fig.lb. However, this inner retainer member 30 has a dual function, since it also provides an expanding force on the sides of the first retainer member 20 and helps to hold the screen 18 secure.
It will be seen that, if only the first retainer member 20 is used to secure the screen, this will be held less securely than when the second retainer member is present . Accordingly, it is advantageous to provide the parts described above as a kit which includes an alternate first retainer member 40, this being shown in Fig.4, and which is used when the channel member 10, which remains fixed to the support, is only required to hold a single sheet of material. The alternate retainer member 40, which is also extruded of plastic material, is similar in respect of its outer side surfaces to the first retainer member, and cooperates with the channel member 10 in the same way, as is shown in Fig.5. Here however, the sides 44 are reinforced by a top plate 42, so as to have less flexibility than the first retainer member and to provide a stronger holding force than the first retainer member when used alone. A recess 44a receives the inwardly projecting lips 16a of the channel member.
Fig.6 shows the preferred form of extrusion for the channel member 10. As shown, two such channel members are formed as a double extrusion, joined by a web 50 which has a central line of weakening 51 and which provides the flanges 14a. The two channels may be separated along this line of weakening, or, alternatively may be used together as a double channel member or dual track pair to provide additional holding power. Fig.6 also shows the line of indentation 52 along the center of each channel member which provides a location for the screws 12.

Claims (5)

1. A fastener for securing first and second sheets of flexible material to a support and for allowing one of said sheets to be removed while another sheet remains secured, comprising:
a channel member having opposed sides and which is attachable to said support, a first retainer member having side portions adapted to fit inside said channel member for holding said first flexible sheet between its side portions and said opposed sides of the channel member, said first retainer member also providing an inner channel between inside surfaces of said side portions, said inside surfaces including at least one undercut, inwardly diverging side surface, and a second, inner, retainer member adapted to fit at least partially inside said inner channel for holding said second sheet of flexible material between outer sides of said second retainer member and said inside surfaces of said side portions of said first retainer member, said second retainer member having at least one outwardly diverging side surface adapted to engage said undercut, inwardly diverging side surface of said inner channel, whereby removal of said second retainer member allows the second flexible sheet to be removed while said first flexible sheet remains in place, and whereby when said second retainer member is in place it provides an expansive force on said side portions of the first retainer member for enhanced gripping of said first flexible sheet against the opposed sides of the channel member.
2. A fastener according to claim 1, wherein said channel member, said first retainer member, and said second retainer member are part of a kit of parts which include an alternate retainer member which can be used in place of the first retainer member when the parts are to be used for only the first flexible sheet, said alternate retainer member having side portions adapted to fit inside said channel member and having enhanced rigidity compared to said first retainer member.
3. A fastener according to claim 1, wherein said sides of said channel member have inner surfaces provided with longitudinal ridges.
4. A fastener according to claim 1, wherein said channel member is formed as one of a pair of similar channel members, said pair being joined by a web having a line of weakening allowing said channel members to be used either as a dual track pair, or singly after severing along said line of weakening.
5. A fastener according to claim 1, wherein said inner surfaces of the first retainer member each has an undercut, inwardly diverging side surface, and wherein said second retainer member has both of its side surfaces outwardly diverging to engage the side surfaces of said first retainer member.
CA2472836A 2004-07-02 2004-07-02 Fastener for holding two sheets of flexible material to a frame Expired - Lifetime CA2472836C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2472836A CA2472836C (en) 2004-07-02 2004-07-02 Fastener for holding two sheets of flexible material to a frame

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA2472836A CA2472836C (en) 2004-07-02 2004-07-02 Fastener for holding two sheets of flexible material to a frame

Publications (2)

Publication Number Publication Date
CA2472836A1 true CA2472836A1 (en) 2006-01-02
CA2472836C CA2472836C (en) 2013-11-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1997979A1 (en) * 2007-05-30 2008-12-03 Carlo Robba Part for linking a sub-assembly, in particular a flexible panel, to a flexible panel comprising an edge bead
US11519222B1 (en) * 2017-11-08 2022-12-06 Christopher Lee Hubschmitt Screen retention device and method of use

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1997979A1 (en) * 2007-05-30 2008-12-03 Carlo Robba Part for linking a sub-assembly, in particular a flexible panel, to a flexible panel comprising an edge bead
FR2916816A1 (en) * 2007-05-30 2008-12-05 Carlo Robba BINDING PART OF A SUBASSEMBLY, IN PARTICULAR A FLEXIBLE PANEL, WITH A FLEXIBLE PANEL COMPRISING A BORDER STITCH
US11519222B1 (en) * 2017-11-08 2022-12-06 Christopher Lee Hubschmitt Screen retention device and method of use

Also Published As

Publication number Publication date
CA2472836C (en) 2013-11-12

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