GB2147478A - Flexible heating tapes - Google Patents
Flexible heating tapes Download PDFInfo
- Publication number
- GB2147478A GB2147478A GB08325772A GB8325772A GB2147478A GB 2147478 A GB2147478 A GB 2147478A GB 08325772 A GB08325772 A GB 08325772A GB 8325772 A GB8325772 A GB 8325772A GB 2147478 A GB2147478 A GB 2147478A
- Authority
- GB
- United Kingdom
- Prior art keywords
- foil
- covering
- plastics body
- protection
- copper
- 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- Withdrawn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
- 238000010438 heat treatment Methods 0.000 title claims abstract description 15
- 239000011888 foil Substances 0.000 claims abstract description 19
- 239000003000 extruded plastic Substances 0.000 claims abstract description 7
- 239000004033 plastic Substances 0.000 claims description 10
- 229920003023 plastic Polymers 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 239000011135 tin Substances 0.000 claims description 4
- 229910052718 tin Inorganic materials 0.000 claims description 4
- 238000010348 incorporation Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/54—Heating elements having the shape of rods or tubes flexible
- H05B3/56—Heating cables
Landscapes
- Resistance Heating (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
A flexible heating tape of the type comprising electrical resistance heating elements embedded in an extruded plastics body is spirally overwrapped with metallic foil which provides mechanical and electrical earth protection. <IMAGE>
Description
SPEGIFICATION
Flexible heating tapes
This invention relates to flexible heating tapes incorporating electrical resistance heating elements.
Such tapes are widely used, for instance, to protect pipes against frost or to otherwise maintain pipes at a predetermined minimum temperature. Such tapes usually comprises an extruded plastics body in which the elements are embedded but the plastics material gives only limited mechanical protection and no electrical (i.e. earth) protection.
In accordance with the invention, a flexible heating tape of the known form in comprising an extruded plastics body are given improved mechanical protection by an overwrapped covering of metallic foil wrapped spirally about the plastics body. Such a protective covering is easily applied, and in addition to improving mechanical protection, it provides electrical earth protection to the tape.
The foil may, for example, be of aluminium, copper, tin/copper or stainless steel. Typically its thickness may be in the order of 0.1 to 0.2 mm, and its width in the order of 10 to 20 mm.
Electrical conductivity of the covering may be enhanced if desired by the incorporation of wire or stranded wire conductor either under or over the foil covering. The wire may be supplied attached to the foil or it may be wrapped as a separate item over the plastics body or over the foil covering.
1. A flexible heating tape comprising electrical resistance heating elements embedded in an extruded plastics body, in a covering of metallic foil wrapped spirally around the plastics body to provide mechanical and electrical earth protection.
2. A tape according to claim 1, wherein the foil is of aluminium, copper, tin/copper or stainless steel.
3. A tape according to claim 1 or 2 wherein the foil thickness is 0.1 to 0.2 mm and its width is preferably 10 to 20 mm.
4. A tape according to claim 1, 2 or 3, wherein a wire conductor is also wrapped around the plastics body or over the foil, to provide additional earth protection.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (4)
1. A flexible heating tape comprising electrical resistance heating elements embedded in an extruded plastics body, in a covering of metallic foil wrapped spirally around the plastics body to provide mechanical and electrical earth protection.
2. A tape according to claim 1, wherein the foil is of aluminium, copper, tin/copper or stainless steel.
3. A tape according to claim 1 or 2 wherein the foil thickness is 0.1 to 0.2 mm and its width is preferably 10 to 20 mm.
4. A tape according to claim 1, 2 or 3, wherein a wire conductor is also wrapped around the plastics body or over the foil, to provide additional earth protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08325772A GB2147478A (en) | 1983-09-27 | 1983-09-27 | Flexible heating tapes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08325772A GB2147478A (en) | 1983-09-27 | 1983-09-27 | Flexible heating tapes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8325772D0 GB8325772D0 (en) | 1983-10-26 |
| GB2147478A true GB2147478A (en) | 1985-05-09 |
Family
ID=10549334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08325772A Withdrawn GB2147478A (en) | 1983-09-27 | 1983-09-27 | Flexible heating tapes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2147478A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB428175A (en) * | 1934-07-30 | 1935-05-08 | Hans Hofer | Improvements in or relating to electrical heating bars and methods of producing the same |
| GB445195A (en) * | 1934-09-29 | 1936-03-30 | Frederick Grisley | Improvements in blankets, pads, quilts, clothing, fabric, or the like, embodying electrical conductors |
| GB811992A (en) * | 1954-05-26 | 1959-04-15 | Henry Hope Bruce | Improvements in electric heating cables |
| GB855130A (en) * | 1956-05-11 | 1960-11-30 | Andrew George Heron | Improvements in or relating to extruded plastic strippings |
| GB1098943A (en) * | 1964-04-02 | 1968-01-10 | Rosemount Eng Co Ltd | Improvements in or relating to sheathed conducting elements |
| GB2038549A (en) * | 1978-12-01 | 1980-07-23 | Raychem Corp | PTC devices having oxygen barrier encapsulation |
-
1983
- 1983-09-27 GB GB08325772A patent/GB2147478A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB428175A (en) * | 1934-07-30 | 1935-05-08 | Hans Hofer | Improvements in or relating to electrical heating bars and methods of producing the same |
| GB445195A (en) * | 1934-09-29 | 1936-03-30 | Frederick Grisley | Improvements in blankets, pads, quilts, clothing, fabric, or the like, embodying electrical conductors |
| GB811992A (en) * | 1954-05-26 | 1959-04-15 | Henry Hope Bruce | Improvements in electric heating cables |
| GB855130A (en) * | 1956-05-11 | 1960-11-30 | Andrew George Heron | Improvements in or relating to extruded plastic strippings |
| GB1098943A (en) * | 1964-04-02 | 1968-01-10 | Rosemount Eng Co Ltd | Improvements in or relating to sheathed conducting elements |
| GB2038549A (en) * | 1978-12-01 | 1980-07-23 | Raychem Corp | PTC devices having oxygen barrier encapsulation |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8325772D0 (en) | 1983-10-26 |
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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) |