GB2228165A - Self adhesive heater tape - Google Patents

Self adhesive heater tape Download PDF

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Publication number
GB2228165A
GB2228165A GB8829372A GB8829372A GB2228165A GB 2228165 A GB2228165 A GB 2228165A GB 8829372 A GB8829372 A GB 8829372A GB 8829372 A GB8829372 A GB 8829372A GB 2228165 A GB2228165 A GB 2228165A
Authority
GB
United Kingdom
Prior art keywords
tape
heater
strip
heater tape
conductive strip
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Withdrawn
Application number
GB8829372A
Other versions
GB8829372D0 (en
Inventor
Roy Victor North
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LOHEAT Ltd
Original Assignee
LOHEAT Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by LOHEAT Ltd filed Critical LOHEAT Ltd
Priority to GB8829372A priority Critical patent/GB2228165A/en
Publication of GB8829372D0 publication Critical patent/GB8829372D0/en
Publication of GB2228165A publication Critical patent/GB2228165A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/472—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially flat
    • B29C66/4722—Fixing strips to surfaces other than edge faces
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/29—Laminated material
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • B29C65/348—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic with a polymer coating
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
    • C09J2301/162—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer the carrier being a laminate constituted by plastic layers only

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Surface Heating Bodies (AREA)

Abstract

Self-adhesive heater tape 1 comprises a length of electrically-conductive strip 14 sandwiched between and enveloped by two lengths of electrically-insulative double-sided adhesive film strip or tape 15, 16. The lengths of strip or tape 15, 16 are wider than the conductive strip 14 and they adhere to each other along both sides of the strip 14 whereby to provide a sealed assembly 1 containing the conductive strip 14. A heater installation comprising the heater tape 1 pressed into position as to be self-adhering to a surface in a region to be heated, with a protective cover strip adhered to the so-fitted tape. The region to be heated may be the edges of a door frame of a cold store. Strip 14 may be of steel. <IMAGE>

Description

"ELECTRICAL HEATER MEANS AND INSTALLATIONS" The invention relates to electrical heater means and installations. In particular it is concerned with conductive heater strip, especially but not exclusively for use in door heating installations, and also with such installations.
It is required to heat around the edges of a door providing entry to a cold store or the like, in order to prevent ice forming around the door and preventing the latter opening and/or properly closing. Electrical heating installations for this purpose are known in which electrical heater wires are fixed along the side and top edges of a door frame and energized from a low-voltage output of a mains transformer.
The object of the invention is to provide a novel construction of electrically conductive heater strip which is advantageously used in such an installation, and the improved installations which result from such use.
According to the invention a heater strip is provided by a tape assembly comprising a length of electrically-conductive strip sandwiched between and enveloped by two lengths of electrically-insulative double-sided adhesive film strip or tape which adhere to each other along both sides of the conductive strip whereby to provide a sealed assembly containing the conductive strip. Not only do the outer insulative strips seal-in and fully insulate the inner conductive strip, but they result in a tape assembly (hereinafter referred to as "a heater tape") which is self-adhesive on both faces.
Thus, on fitting the heater tape merely has to be pressed into position, for example against a door frame, in order to adhere thereto and no separate fixing means or devices are required. Furthermore, a protective cover strip can then be applied and securely held in position by the outer adhesive surface of the heater tape of the invention. Preferably the adhesive surfaces of the heater tape are protected by peel-off cover strips, for example of paper with a siliconised or other release surface, which protect these surfaces from contamination prior to fitting of the tape and which are easily peeled off to expose the adhesive surfaces as required to allow the tape and cover plate to be fitted.
The central conductive strip of the heater tape is preferably of annealed stainless steel, and the outer insulative film strips are conveniently of synthetic plastics material, for example polyester material.
The invention also includes within its scope a heater installation wherein the heater tape is fixed as described, so as to be self-adhering to a surface in a region to be heated, and a protective cover strip is adhered to the so-fitted tape. The installation is conveniently a heating installation for a door of a cold store.
The invention will now be further described by way of example with reference to the accompanying drawings which illustrate a door-heating installation and heater tape representing embodiments of the invention. In the drawings: Fig. 1 illustrates a portion of the door-heating installation including heater tape in accordance with the invention, in the region of the end connections of the tape and with a lid of a connection box removed; Fig. 2 is a partial cross-sectional view on the line II-II in Fig. 1; Fig. 3 is a partially exploded view of the installation at a side edge of the door; and Fig. 4 is an exploded view of the heater tape assembly in accordance with the invention.
The heater tape of the invention is particularly suitable for use in the heating installation for a cold store door as illustrated in Figs. 1 to 3. The pliable and self-adhesive tape 1 is fixed around the steel door frame 2 in the region of the door edge, and Fig. 1 shows the top member 3 of the door frame on which a connection box 4 is mounted by means of a flanged metal back plate 4a. A strip 5 of insulating material such as bakelite mounted within the box 4 supports two tape clamp connectors 6 to which the bared conductive ends 7 of the heater tape 1 are secured.
Also separately secured to the connectors 6 are energizing leads 8 from the low-voltage secondary of a mains-energized transformer (not shown). A thin insulating strip 10, for example also of bakelite, is positioned behind the connector strip 5 and insulates the clamp screws 11 from the back of the metal box 4. The connections in the box 4 are protected by a removable lid 9, shown as detached in Fig. 2 but for clarity omitted entirely from Fig. 1.
Figs. 1 and 2 clearly show how easily the installation is effected and, in particular, how neatly and quickly the self-adhesive heater tape 1 can be fitted. Not only are separate fixings or fixing devices not required but the flexibility of the tape allows it to be bent and pressed down flat at corners and at other directional changes in the tape run as shown at 12 in Fig. 1 and at 13 in Fig. 2, for example.
The drawings illustrate the heater tape in accordance with the invention in exploded view in Fig. 4.
As shown in that figure the tape 1 has a central core provided by a metal conductive strip 14 which in the embodiment illustrated is of bright annealed stainless steel. The strip 14 has a cross-sectional area chosen to provide the required electrical resistance, but it is conveniently 0.005 inch (about 1.25 mm) thick and 0.25, 0.50 or 1.00 (about 0.65 mm, 1.30 mm or 2.54 mm) wide. It is sandwiched between and enveloped by strips 15 and 16 of double-sided adhesive insulative material. The outer strips 15 and 16 are wider than and laid symmetrically on the inner conductive strip 14, so that their facing adhesive surfaces 17 and 18 not only adhere to the conductive strip 14 but also to each other on both sides of the strip 14. Thus a sealed tape assembly results which is self adhesive whilst being extremely flexible, cheap to manufacture and easy to handle and fit.
It will be appreciated that the outer adhesive strips 15 and 16 used in the heater tape assembly can be of any suitable material which has the required insulation properties, flexibility and compatibility with the operating environment. In the illustrated embodiment, these strips are provided by double-coated adhesive polyester film or tape having a thickness of 0.39 mm.
Referring to the exploded view of Fig. 4, the outer adhesive faces of the heater tape 1 as manufactured are covered by paper release strips at 19. These can be stripped off separately to expose the adhesive faces of the tape 1 as required. Thus, on fitting of the heater tape 1 one strip 19 is removed to allow the tape 1 to be fitted around the door frame as has been described, at the ends of the heater tape the outer strips 15 and 16 being cut back to bare the inner conductive strip 14 and allow the end connections to be made. Thereafter the other release strip 19 is removed to allow a protective metal cover plate 20 at the top of the door frame 2, and corresponding cover plates 21 at the sides thereof, to be fitted. These plates 20 and 21, which protect the fitted heater tape 1, are secured by the outer adhesive coating of the heater tape so that this part of the installation procedure also does not require separate fixings to be used.

Claims (10)

CLAIMS:
1. Heater tape comprising a length of electricallyconductive strip sandwiched between and enveloped by two lengths of electrically-insulative double-sided adhesive film strip or tape which are wider than the conductive strip and which adhere to each other along both sides of the conductive strip whereby to provide a sealed assembly containing the conductive strip.
2. Heater tape according to claim 1, wherein the adhesive surfaces of the heater tape are protected by peel-off cover strips which protect these surfaces from contamination prior to fitting of the tape.
3. Heater tape according to claim 2, wherein the peel-off cover strips are of paper with a siliconised or other release surface.
4. Heater tape according to any one of the preceding claims, wherein the inner electrically-conductive strip is of annealed stainless steel.
5. Heater tape according to any one of the preceding claims, wherein the outer insulative film strips are of synthetic plastics material.
6. A heater tape according to claim 5, wherein the outer insulative film strips are of polyester material.
7. A heater installation comprising heater tape which is in accordance with any one of the preceding claims and which is pressed into position as to be self-adhering to a surface in a region to be heated, with a protective cover strip adhered to the so-fitted tape.
8. A heater installation according to claim 7, comprising a heating installation for a door of a cold store.
9. Heater tape constructed and arranged substantially as hereinbefore particularly described with reference to the accompanying drawings.
10. A heater installation constructed and arranged substantially as hereinbefore particularly described with reference to the accompanying drawings.
GB8829372A 1988-12-16 1988-12-16 Self adhesive heater tape Withdrawn GB2228165A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8829372A GB2228165A (en) 1988-12-16 1988-12-16 Self adhesive heater tape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8829372A GB2228165A (en) 1988-12-16 1988-12-16 Self adhesive heater tape

Publications (2)

Publication Number Publication Date
GB8829372D0 GB8829372D0 (en) 1989-02-01
GB2228165A true GB2228165A (en) 1990-08-15

Family

ID=10648600

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8829372A Withdrawn GB2228165A (en) 1988-12-16 1988-12-16 Self adhesive heater tape

Country Status (1)

Country Link
GB (1) GB2228165A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257608B (en) * 1991-07-05 1995-07-19 Ruthenberg Gmbh Waermetechnik Car seat heating device
US5961869A (en) * 1995-11-13 1999-10-05 Irgens; O. Stephan Electrically insulated adhesive-coated heating element
US6054690A (en) * 1995-05-04 2000-04-25 Norton Pampus Gmbh Heating element, manufacturing process and application
US6350969B1 (en) 2000-11-10 2002-02-26 Jona Group, Ltd. Self-regulating heater
US6353707B1 (en) * 1998-01-09 2002-03-05 Ceramitech, Inc. Electric heating ribbon with multiple coating sections attached to ribbon
US9603196B2 (en) 2012-12-14 2017-03-21 Tech Design Llc Self-regulating semi-conductive flexible heating element

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3569666A (en) * 1969-07-22 1971-03-09 Timely Products Corp Self-contained low voltage battery operated glove
US3584198A (en) * 1968-02-29 1971-06-08 Matsushita Electric Works Ltd Flexible electric surface heater
GB1333049A (en) * 1969-12-18 1973-10-10 Eisler P Heating units

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3584198A (en) * 1968-02-29 1971-06-08 Matsushita Electric Works Ltd Flexible electric surface heater
US3569666A (en) * 1969-07-22 1971-03-09 Timely Products Corp Self-contained low voltage battery operated glove
GB1333049A (en) * 1969-12-18 1973-10-10 Eisler P Heating units

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257608B (en) * 1991-07-05 1995-07-19 Ruthenberg Gmbh Waermetechnik Car seat heating device
US6054690A (en) * 1995-05-04 2000-04-25 Norton Pampus Gmbh Heating element, manufacturing process and application
US5961869A (en) * 1995-11-13 1999-10-05 Irgens; O. Stephan Electrically insulated adhesive-coated heating element
US6353707B1 (en) * 1998-01-09 2002-03-05 Ceramitech, Inc. Electric heating ribbon with multiple coating sections attached to ribbon
US6350969B1 (en) 2000-11-10 2002-02-26 Jona Group, Ltd. Self-regulating heater
US9603196B2 (en) 2012-12-14 2017-03-21 Tech Design Llc Self-regulating semi-conductive flexible heating element

Also Published As

Publication number Publication date
GB8829372D0 (en) 1989-02-01

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)