GB2236477A - Carpet fixing strip - Google Patents
Carpet fixing strip Download PDFInfo
- Publication number
- GB2236477A GB2236477A GB9021416A GB9021416A GB2236477A GB 2236477 A GB2236477 A GB 2236477A GB 9021416 A GB9021416 A GB 9021416A GB 9021416 A GB9021416 A GB 9021416A GB 2236477 A GB2236477 A GB 2236477A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strip
- gripping teeth
- carpet
- polymer
- fixing
- 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.)
- Withdrawn
Links
- 229920000642 polymer Polymers 0.000 claims abstract description 16
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 15
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 15
- 238000001125 extrusion Methods 0.000 claims abstract description 10
- 230000008602 contraction Effects 0.000 claims abstract 3
- 238000000034 method Methods 0.000 claims description 10
- 230000000717 retained effect Effects 0.000 claims description 7
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000009408 flooring Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 239000004821 Contact adhesive Substances 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G27/00—Floor fabrics; Fastenings therefor
- A47G27/04—Carpet fasteners; Carpet-expanding devices ; Laying carpeting; Tools therefor
- A47G27/0437—Laying carpeting, e.g. wall-to-wall carpeting
- A47G27/045—Gripper strips; Seaming strips; Edge retainers
- A47G27/0462—Tack strips for tensioning or seaming
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/154—Coating solid articles, i.e. non-hollow articles
- B29C48/155—Partial coating thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Carpets (AREA)
Abstract
A carpet fixing strip comprises a thermoplastics polymer extrusion 2 having gripping teeth 8, 9 embedded in the extrusion. The gripping teeth are inserted while the extrusion is in a metastable state, i.e. the extrusion has not stabilized, and the polymer retains the teeth by contraction during its stabilization phase. <IMAGE>
Description
IMPROVEMENTS IN OR RELATING TO CARPET FIXING STRIP
This invention relates to carpet fixing strip and more particularly to a novel method for the manufacture thereof in a thermoplastics polymer material.
The use of strip material for firmly fixing the edges of carpeting is well-known, and the current state of the art involves the use of wood or metal in the construction of such strips.
We have found that the use of thermoplastics polymer in conjunction with a novel method of manufacture allows a carpet fixing strip to be made which has distinct cost and production advantages over the wood or metal versions.
The process according to this invention involves the extrusion of a thermoplastics strip having a distinct and specific profile which affords a means whereby both gripping and fixing pins can be located within the length c5 the strip following extrusion, said fixing pins being metal or plastic. The material of construction may be any thermoplastic type polymer which is compatible with the established plastics extrusion process, such as for example polypropylene, high or low density polyethylene, or rigid or plasticised polyvinyl chloride. The choice of material is not critical to the furtherance or functionality of this invention, but is preferably selected from the so-called 'high volume' thermoplastics types for reasons of cost.The thermoplastics material may be of an unfilled or filled grade and also expanded (cellular) but since the fixing strip is not normally subjected to the known detrimental effect of environmental heat and/or light when it is in position, the inclusion of stabilisers within the thermoplastic is unnecessary other than those required with preventing degradation during processing or storage.
The thermoplastics may or may not contain a colourant and/or a cellulosic, mineral or other filler.
According to the present invention there is provided a carpet fixing strip comprising a generally flat, extruded length of a thermoplastics polymer having a plurality of longitudinally spaced gripping teeth retained in said extruded length, the gripping teeth being angled with respect to the plane of the strip so as to facilitate securing the carpet edge to the strip.
The strip may be moulded with recesses and protrusions to retain the gripping teeth in the strip.
However, preferably, the gripping teeth are retained by inserting them in the strip while it is still fresh or has not reached the maximum condition of shrinkage or stability. As a result, the polymer contracts around the gripping teeth, locking them in position.
The gripping teeth may be conventional nails or pins of the kind used in wooden carpet fixing strips and are preferably inserted at an angled inclined to the plane of the strip.
The invention will now be described with reference to the accompanying drawings, in which:
Figure 1 is a cross-section through one embodiment of carpet fixing strip, prior to inserting the gripping teeth,
Figure 2 is a view similar to Figure 1, showing the gripping teeth in position,
Figure 3 is a view similar to Figure 2 with the fixing pins inserted,
Figure 4 is a cross-section through a second embodiment of carpet fixing strip, prior to inserting the gripping teeth,
Figure 5 is a view similar to Figure 4 showing the gripping teeth in position, and
Figure 6 is a view similar to Figure 5, with the fixing pins in position.
Referring to Figures 1, 2 and 3, the carpet strip comprises an extruded generally flat strip of thermoplastics material, about 6 mms thick and 22 mms wide. One upright face 1 of the strip is generally at right angles to the top face 2, while the other side face 3 is relieved so as to provide more space for the edge of the carpet between the strip and the wall of the room. On its underside 4, the strip is formed with three longitudinal recesses. The outer two recesses 5 and 6 are designed to receive the heads of nails 8, 9 or other pointed devices which are forced through the strip so that their pointed ends are inclined to the top surface 2 of the strip. Recesses 5 and 6 have moulded flexible protrusions or flaps 10,11 which retain the heads of the nails in the strip when fully inserted into the strip.
Pins or nails 12 for fixing the strip to a floor are inserted through the top face of the strip in line with a central recess 13 so that the fixing nail is retained with its point substantially shrouded by the walls of the recess 13. As an example the gripping nails 8 and 9 may each be inserted at 3 cm centres and the fixing pins 12 inserted at 10 cm centres.
Preferably, the fixing and gripping pins are inserted into the strip while it is still warm from extrusion. In this case, it is unnecessary to provide moulded protrusions in the recesses 5 and 6 to ensure that the heads of the gripping nails are retained firmly in the strip. Figures 4, 5 and 6, in which the same reference numerals are used to indicate corresponding features of the strip, show an embodiment suitable for inserting the gripping nails while the strip is in a metastable condition.
An additional advantage of introducing the pins or nails before the polymer has cooled to room temperature is that there is no risk of splitting the strip in the nailing process.
In practice, the carpet strip profile is drawn from the extrusion head onto a bed where it cools. Either immediately before or after the re-heating, during cooling, the polymer will shrink and if the nails are inserted then or before stabilization is complete, they will be locked into the polymer strip by its shrinkage.
Normally for most thermoplastics, the nails are best inserted within 30 minutes, preferably within 5 to 20 minutes, e.g. about 15 minutes of extruding the polymer strip. In this period, the polymer will have cooled sufficiently so that the strip can be passed to a punch or nailing machine without distorting or damaging the strip.
At the same time, the polymer, particularly in the centre, will still be undergoing shrinkage as it cools.
The number, size and spacing of both the gripper and fixing pins is in no way critical for the purposes of this invention. The overall dimensions Ç x-en in the accompanying diagrams are by way of example only and are not restrictive or limitative.
An alternative method of fastening the fixing strip to the floor involves the provision of a pressuresensitive or contact adhesive under-surface to the strip material which is protected by an inert peelable film which is removed immediately prior to installation.
Alternatively, a heat-activated hot melt adhesive strip may be employed. These methods of fastening are designed for use on flooring where the pin fixing method is impracticable such as, for example, in concrete flooring.
Claims (6)
1. A carpet fixing strip comprising a generally flat, extruded length of a thermoplastics polymer having a plurality of longitudinally spaced gripping teeth retained in said extruded length, the gripping teeth being angled with respect to the plane of the strip so as to facilitate securing the carpet edge to the strip.
2. A strip according to claim 1 in which the gripping teeth are retained in the strip by moulded protrusions.
3. A strip according to claim 1 in which the gripping teeth are retained by contraction of the thermoplastics polymer around the teeth.
4. A strip according to any one of the preceding claims which also includes fixing pins for attaching the strip to a floor, the fixing pins being held in the strip by contraction of the polymer.
5. A method of producing a carpet fixing strip which comprises extruding a length of a thermoplastics polymer to provide one or more longitudinal grooves and inserting gripping teeth in said groove or grooves while the extruded strip is in a metastable state.
6. A method according to claim 5 wherein the stripe is in its metastable state as a result of the strip being incompletely cooled from the extrusion step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9021416A GB2236477A (en) | 1989-10-05 | 1990-10-02 | Carpet fixing strip |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB898922464A GB8922464D0 (en) | 1989-10-05 | 1989-10-05 | Improvements in or relating to carpet fixing strip |
| GB898923624A GB8923624D0 (en) | 1989-10-19 | 1989-10-19 | Improvements in or relating to carpet fixing strip |
| GB9021416A GB2236477A (en) | 1989-10-05 | 1990-10-02 | Carpet fixing strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9021416D0 GB9021416D0 (en) | 1990-11-14 |
| GB2236477A true GB2236477A (en) | 1991-04-10 |
Family
ID=27264723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9021416A Withdrawn GB2236477A (en) | 1989-10-05 | 1990-10-02 | Carpet fixing strip |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2236477A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2248182B (en) * | 1990-09-26 | 1994-09-14 | Ikeda Bussan Co | Structure for fixing carpet on vehicular floor panel |
| GB2361639A (en) * | 2000-04-18 | 2001-10-31 | Long Port Invest Ltd | Carpet gripper |
| GB2367000A (en) * | 2000-09-01 | 2002-03-27 | Gates | A carpet securement strip |
| WO2023193050A1 (en) * | 2022-04-05 | 2023-10-12 | Ryan Muir | Improvements in carpet tack strips and related methods |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3551939A (en) * | 1969-03-27 | 1971-01-05 | Keith E Rager | Stair carpet fasterner |
| US3673633A (en) * | 1969-09-23 | 1972-07-04 | James Frebraro | Carpet tack strip |
| GB1363806A (en) * | 1972-04-07 | 1974-08-21 | Tackless Carpet Fasteners Pty | Fasteners for carpets |
| GB1443456A (en) * | 1972-07-13 | 1976-07-21 | Sutton L R | |
| GB2221838A (en) * | 1988-08-19 | 1990-02-21 | Dudley Raymond Chandler | Carpet gripper assembly |
-
1990
- 1990-10-02 GB GB9021416A patent/GB2236477A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3551939A (en) * | 1969-03-27 | 1971-01-05 | Keith E Rager | Stair carpet fasterner |
| US3673633A (en) * | 1969-09-23 | 1972-07-04 | James Frebraro | Carpet tack strip |
| GB1363806A (en) * | 1972-04-07 | 1974-08-21 | Tackless Carpet Fasteners Pty | Fasteners for carpets |
| GB1443456A (en) * | 1972-07-13 | 1976-07-21 | Sutton L R | |
| GB2221838A (en) * | 1988-08-19 | 1990-02-21 | Dudley Raymond Chandler | Carpet gripper assembly |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2248182B (en) * | 1990-09-26 | 1994-09-14 | Ikeda Bussan Co | Structure for fixing carpet on vehicular floor panel |
| GB2361639A (en) * | 2000-04-18 | 2001-10-31 | Long Port Invest Ltd | Carpet gripper |
| US6708367B2 (en) | 2000-04-18 | 2004-03-23 | Long Port Investments Limited | Fabric gripper |
| GB2361639B (en) * | 2000-04-18 | 2005-04-13 | Long Port Invest Ltd | Fabric gripper |
| GB2367000A (en) * | 2000-09-01 | 2002-03-27 | Gates | A carpet securement strip |
| WO2023193050A1 (en) * | 2022-04-05 | 2023-10-12 | Ryan Muir | Improvements in carpet tack strips and related methods |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9021416D0 (en) | 1990-11-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |