GB2039982A - Tensioning and securing flexible sheet material - Google Patents
Tensioning and securing flexible sheet material Download PDFInfo
- Publication number
- GB2039982A GB2039982A GB7849895A GB7849895A GB2039982A GB 2039982 A GB2039982 A GB 2039982A GB 7849895 A GB7849895 A GB 7849895A GB 7849895 A GB7849895 A GB 7849895A GB 2039982 A GB2039982 A GB 2039982A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tab
- lip
- locking member
- hinge line
- base member
- 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
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/02—Seat parts
- A47C7/28—Seat parts with tensioned springs, e.g. of flat type
- A47C7/282—Seat parts with tensioned springs, e.g. of flat type with mesh-like supports, e.g. elastomeric membranes
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
- A47C31/02—Upholstery attaching means
- A47C31/023—Upholstery attaching means connecting upholstery to frames, e.g. by hooks, clips, snap fasteners, clamping means or the like
Landscapes
- Closures For Containers (AREA)
Abstract
A device (1) for securing and tensioning flexible sheet material (16) e.g. loose fabric cover comprises a base member (2) and a locking member (3) hinged together along a hinge line (4), the base member having an anvil portion (5) and a lip (6), the locking member having a lip (7), the locking member (3) being pivotal about the hinge line (4) towards the base member (2) to cause interlocking engagement of the lips (6, 7) to hold the device in a closed condition and to cause the lip (7) to cooperate with the anvil portion for clamping the sheet material (16), the device further comprising a tab (8) attached to the base member, a recess (11) being formed in the anvil portion for receiving the tab, wherein when the device is in its closed condition portion (8'') of tab (8) is located in recess (11) between the anvil portion (5) and the lip (7), pulling of the free end portion (8') of the tab causing the tab to act upon the lip (7) to disengage the lips (6, 7) thereby allowing the device to open. <IMAGE>
Description
SPECIFICATION
Tensioning and securing flexible sheet material under tension
Field of the invention
The present invention relates to the tensioning and securing of flexible sheet material under tension.
Background of the invention
There are many occasions when it is desirable to tension and secure flexible sheet material, under tension, e.g. when fitting loose covers made of fabric, usually stretchable fabric, to upholstered furniture.
In my British patent No. 1275065, 1 claim a device for tensioning and securing flexible sheet material comprising a base and a curved member, first margins of the base and the curved member having hinged connection by hinge means, and second margins of the base and the curved member being parallel to the first margins and each having a lip, with the lip of the second margin of the curved member having pointed projections; the arrangement being such that when sheet material is engaged with the projections and extends over the curved member, between the curved member and the base, pivoting of the curved member towards the base by means of the hinged means, so that the lips engage each other with the material between them, tensions the material and secures the curved member in the pivoted position.
The device claimed in any aforementioned patent may further comprise a tab having an inner end and an outer end, the inner end being attached to the second margin of the base, the tab being in the form of a bendable strip. When the curved member is pivoted towards the base by means of the hinge means so that the lips engage each other, the tab wraps around the lip of the base member between that lip and the curved member. To disengage the lips from each other, thereby to open the device and release the sheet material, the free end of the tab is pulled.
It has been found in practice that the device including the tab has a number of shortcomings. The presence of the tab between the base and the lip of the curved member restricts the degree of engagement between the lips. Also the natural resilience of the tab and its connection to the base tend to urge the engaged lips apart. These two factors, especially when the sheet material is relatively thick thereby further restricting the degree of engagement of the lips, result in the device securing the sheet material in an unsatisfactory manner, the lips being liable to disengage and release the sheet material, e.g. if extra tension is applied to the sheet material or the device is subjected to an accidental knock or blow.
Also in use the device is normally attached to an element of a structure to be covered by the sheet material. The resilience of the tab urges the tab against the element making it difficult to grasp the tab to effect release of the sheet material and increasing the force exerted by the tab tending to urge the engaged lips apart.
The present invention aims to provide a device for tensioning and securing sheet material, in which device the above-mentioned shortcomings of the known device are alleviated or overcome.
Description ofthe invention
In accordance with the present invention, there is provided a device for securing and tensioning flexible sheet material, comprising a base member and a locking member, the base member and the locking member being hinged together along a hinge line, the base member having an anvil portion and a lip remote from the hinge line, the locking member having a lip remote from the hinge line, the locking member being pivotal about the hinge line towards the base memberto cause interlocking engagement of the lips to hold the device in a closed condition and to cause the lip of the locking member to cooperate with the anvil portion of the base member for clamping flexible sheet material disposed between the lip and the anvil portion, the device further comprising a tab attached to the base member, a recess being formed in the anvil portion for receiving the tab, wherein when the device is in its closed condition the tab extends through the recess in the anvil portion between the anvil portion and the lip of the locking member, pulling of the free end portion of the tab causing the tab to act upon the lip of the locking member to disengage the lips from each other hereby allowing the device to open and release any clamped flexible sheet material.
Thus the presence of the recess in the anvil portion enables the tab to extend between the anvil portion of the base member and the lip of the locking member whilst preventing or reducing interference of the tab with the clamping of flexible sheet material between the anvil portion and the lip of the locking member.
The thickness of at least the part of the tab which is disposed in the recess and opposite the lip of the locking member when the device is in its closed condition should not be greater than the depth of the recess otherwise the tab would project out of the recess and interfere with the clamping of flexible sheet material between the anvil portion and the lip of the locking member.
If the tab is of approximately the same thickness as the depth of the recess, the flexible sheet material can be clamped not only between the anvil portion ofthe base member and the lip of the locking member but also between the tab and the base of the locking member.
Preferably the tab has a hinge line intermediate its ends, the free end portion of the tab being between the hinge line and the free end of the tab and the tab having a second portion between its end attached to the base member and the hinge line, the second portion of the tab being located in the recess in the anvil portion of the base member and the free end portion extending away from the base member and the locking member when the device is in its closed condition. The presence of the hinge line in the tab assists in making the free end of the tab easily grippable to open the device and in reducing the tendency of the tab to act upon the lip of the locking member to cause the lips to disengage and the device to open.
Preferably the tab is attached to the lip of the base member along a hinge line. The presence of this hinge line also assists in reducing the tendency of the tab to act upon the lip of the locking member to cause the lips to disengage and the device to open.
Thus in a preferred embodiment, as discribed below with reference to the accompanying drawings, although the tab enables the device to be readily opened when desired to release sheet material clamped by the device, the tab does not interfere with the reliability and effectiveness of the clamping action of the device.
Preferably the lip of the base member projects away from the first hinge line and the lip of the locking member projects towards the first hinge line.
Preferably the locking member, when seen in a section transverse to the first hinge line, curves outwardly relative to the base.
Brief description of the drawings
Figure 7 is a sectional view through a device according to the invention, the device being shown in an open condition and attached to an element of a structure to be covered by sheet material:
Figure 2 is a perspective view of the device of
Figure 1; and
Figure 3A is similar to Figure 1 but shows the device being closed in order to secure flexible sheet material;
Figure 3B is similar to Figure 3A but shows the device in its closed condition.
Referring to the drawings, a device 1 is moulded from synthetic thermoplastics material and comprises a base member 2 and a locking member 3 hinged together along a hinge line 4 constituted by a relatively thin linear portion of the thermoplastics material. The base member 2 is provided with an upstanding flange or anvil portion 5 along its edge remote from the hinge line 4, the flange 5 being formed with a lip 6. The locking member 3 is provided with a lip 7 along its edge remote from the hinge line 4.
The lip 6 of the base member 2 projects away from the hinge line 4 and the lip 7 of the locking member 3 projects towards the hinge line.
As shown in Figure 1, the locking member 3, when seen in a section transverse to the hinge line 4, curves outwardly relative to the base member 2.
The device 1 further comprises a tab 8 which may be regarded as having an inner end and an outer, free end, the inner end being attached to the lip 7 of the locking member 3 along a hinge line 9.
Intermediate the ends of the tab 8, a hinge line 10 is formed. The tab thus comprises an outer free end portion 8' and a second portion 8" hinged together at the hinge line 10. The tab 8 is generally in the form of a strip but its outer free end position 8" is formed with a circular shaped part as shown in Figure 1 to assist the manual grasping of that portion.
A recess 11 is formed in the anvil portion 5, the width of the recess being slightly greater than the width of the strip-like portion of the tab 8, and the depth of recess being no less than the thickness of the portion 8 of the tab.
In use of the device 1, it is fastened to an element 13, for example, a base member of a chair, by a nail 14 or other fixing means driven through a hole 15 provided in the base member 2. Flexible sheet material 16, such as a loose fabric cover, is placed in position and an edge portion of the material 16 is looped around the locking member 3 so that the free edge of the material is disposed with: the space S between the base member 2 and the locking member 3. Excess of the material 16 may be rolled up and put in the space S particularly if the material is likely to shrink.
The locking member 3 is then pivoted towards the base member 2 to cause the lip 7 to engage the lip 6 as shown in Figure 3A. Further pressure applied to the locking member 3 in a direction (as shown by arrow P) towards the base member 2 and away from the hinge line 4 causes the lip 7 to snap over the lip 6, the sheet material 16 then being clamped between the anvil portion 5 and the lip 7 as shown in Figure 3B. The device is then in its closed condition and the portion 8" of the tab 8 is located in the recess 11 and is disposed between the anvil portion 5 and the lip 7.
If the thickness of the portion 8" is approximately equal to the depth of the recess 11, the material 16 is also clamped between the portion 8" and the lip 7.
The portion 8" of the tab 8 is accommodated within the recess 11 and, due to the hinge lines 9 and 10 does not act resiliently on the material 16 or on the lip 7. Thus there is no tendency for the tab 8 to cause the lip 7 to ride over the lip 6 thereby opening the device and releasing the material 16.
If when the material 16 is being secured by the device, the material is held fast at a different position, then the pivoting of the locking member 2 tensions the material and when the device attains its closed condition, the material is held under tension.
To open the device and release the material the bottom part of the tab 8 is grasped and pulled in the direction of arrow R in Figure 3B. This pulls the lip 7 away from the anvil portion 5 of the base member 1 and allows the lip to slide along the portion 8" of the tab and over the lip 6 of the base member. The locking member 2 can then pivot freely to a fully open position, as shown in Figures 1 and 2.
It will be appreciated that the device shown in the drawings does not require pointed projections to assist in securing the sheet material 16 since the sheet material is firmly clamped between the anvil portion 5 and the lip 7. However, if desired pointed projections may be provided on the convex surface of the locking member 3 to assist in securing the sheet material 16.
Claims (8)
1. A device for tensioning and securing flexible sheet material, comprising a base member and a locking member, the base member and the locking member being hinged together along a hinge line, the base member having an anvil portion and a lip remote from the hinge line, the locking member having a lip remote from the hinge line, the locking member being pivotal about the hinge line towards the base member to cause interlocking engagement of the lips to hold the device in a closed condition and to cause the lip of the locking member to cooperate with the anvil portion of the base member for clamping flexible sheet material disposed between the lip and the anvil portion, the device further comprising a tab attached to the base member, a recess being formed in the anvil portion for receiving the tab, wherein when the device is in its closed condition the tab extends through the recess in the anvil portion between the anvil portion and the lip of the locking member, pulling of the free end portion of the tab causing the tab to act upon the lip of the locking member to disengage the lips from each other thereby allowing the device to open and release any clamped flexible sheet material.
2. A device according to claim 1, wherein the thicknesss of at least the part of the tab which is disposed in the recess and opposite the lip of the locking member when the device is in its closed condition is not substantially greater than the depth of the recess.
3. A device according to claim 2, wherein the tab is of approximately the same thickness as the depth of the recess.
4. A device according to any preceding claim, wherein the tab has a hinge line intermediate its ends, the free end portion of the tab being between the hinge line and the free end of the tab and the tab having a second portion between its end attached to the base member and the hinge line, the second portion of the tab being located in the recess in the anvil portion of the base member and the free end portion extending away from the base member and the locking member when the device is in its closed condition.
5. A device according to any preceding claim, wherein the tab is attached to the lip of the base member along a hinge line.
6. A device according to any preceding claim, wherein the lip of the base member projects away from the first hinge line and the lip of the locking member projects towards the first hinge line.
7. A device according to any preceding claim, wherein the locking member, when seen in a section transverse to the first hinge line, curves outwardly relative to the base.
8. A device according to any preceding claim, substantially as described herein with reference to and as illustrated in the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7849895A GB2039982B (en) | 1978-12-22 | 1978-12-22 | Tensioning and securing flexible sheet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7849895A GB2039982B (en) | 1978-12-22 | 1978-12-22 | Tensioning and securing flexible sheet material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2039982A true GB2039982A (en) | 1980-08-20 |
| GB2039982B GB2039982B (en) | 1982-07-21 |
Family
ID=10501921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7849895A Expired GB2039982B (en) | 1978-12-22 | 1978-12-22 | Tensioning and securing flexible sheet material |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2039982B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4676016A (en) * | 1985-11-07 | 1987-06-30 | Phillips Harold B | Hanger for a wall covering |
| US5040586A (en) * | 1990-07-02 | 1991-08-20 | Marketing Displays, Inc. | Banner holding device |
| US6431251B1 (en) | 2000-11-27 | 2002-08-13 | Snap-Tex International L.L.C. | Mid-wall hanger |
| FR2901752A1 (en) * | 2006-06-06 | 2007-12-07 | Faurecia Sieges Automobile | Seat`s armature for motor vehicle, has ruler with fixation unit adapted to be fixed on crosspiece by maintaining ruler in angular usage position in which suspension layer presenting two lateral edges is stretched |
| FR2939378A1 (en) * | 2008-12-05 | 2010-06-11 | Faurecia Sieges Automobile | Upholstery fixing method for frame of base/backrest of motor vehicle seat, involves rotating fixation element with respect to rod of frame until hooking portion of fixation element co-operates with another rod of frame |
-
1978
- 1978-12-22 GB GB7849895A patent/GB2039982B/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4676016A (en) * | 1985-11-07 | 1987-06-30 | Phillips Harold B | Hanger for a wall covering |
| US4805330A (en) * | 1985-11-07 | 1989-02-21 | John Bubernak | Hanger for a wall covering |
| US5040586A (en) * | 1990-07-02 | 1991-08-20 | Marketing Displays, Inc. | Banner holding device |
| US6431251B1 (en) | 2000-11-27 | 2002-08-13 | Snap-Tex International L.L.C. | Mid-wall hanger |
| FR2901752A1 (en) * | 2006-06-06 | 2007-12-07 | Faurecia Sieges Automobile | Seat`s armature for motor vehicle, has ruler with fixation unit adapted to be fixed on crosspiece by maintaining ruler in angular usage position in which suspension layer presenting two lateral edges is stretched |
| FR2939378A1 (en) * | 2008-12-05 | 2010-06-11 | Faurecia Sieges Automobile | Upholstery fixing method for frame of base/backrest of motor vehicle seat, involves rotating fixation element with respect to rod of frame until hooking portion of fixation element co-operates with another rod of frame |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2039982B (en) | 1982-07-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19941222 |