| DE2908576A1 | 1980-09-11 | |||
| DE3117402A1 | 1982-11-18 | |||
| GB1580666A | 1980-12-03 | |||
| GB2070400A | 1981-09-03 | |||
| US2674683A | 1954-04-06 | |||
| FR1546465A | 1968-11-22 | |||
| AT306871B | 1973-04-25 |
| 1. | Heating pad, preferably for car seats, which pad may be loose or builtin and has one part for the seatpart or back and prefer¬ ably a second part for the back or seatpart, each heating pad part having an upper section and a lower section and a wire section between comprising insulated electric wire for the emis¬ sion of heat, characterised in that upper section (2), lower section (1) and wire part (3) are joined together by adhesive means which are not mechanical and enable the wire loops to be placed extremely close together. |
| 2. | Heating pad according to claim 1, characterised in that at least the upper section (2) or lower section (1) is provided with an adhesive surface, said surface being preferably covered by a removable protective layer before being fitted. |
| 3. | Heating pad according to claim 1, characterised in that wire included in the wire section (3) is provided with adhesive. |
| 4. | Heating pad according to claim 3, characterised in that said wire is provided along its length with a protruding flange or flanges provided with adhesive. |
| 5. | Heating pad according to claim 3, characterised in that the wire is applied on a ribbon or tape with adhesive. |
| 6. | Heating pad according to one or more of the preceding claims, characterised in that the two pad sections are connected. |
| 7. | Heating pad according to one or more of the preceding claims, characterised in that the material in the upper section (2) and the lower section (1) may be selected from woven fabric, paper, plastic, foam plastic and similar materials. OMH. |
The present invention relates to a heating pad for a seat, said seat being arranged in a vehicle, vessel, aircraft or the like. The heating pad may be loose on the seat or may be built-in. Conventionally such pads comprise an upper section and a lower section and between them an
5 electric wire arranged in loops, which emits heat when current is passed through it. To enable the upper and lower sections to be fitted
. with a wire section between them, considerable space has been required between two adjacent wire sections, as well as two parallel wires being required to provide sufficient heat. Since adjacent wires in the wire
10 section could not be placed too close together, the heat obtained from the heating pad is uneven, some parts emitting considerable heat and others less heat.
The object of the present invention is to provide a heating pad with uniform heat distribution over the entire surface. This is achieved by
15 means of the present invention since the wire in the wire section can be arranged in loops with extremely little space between adjacent loops of wire. The arrangement of the wire sections then enables the upper and lower sections of the heating pad to be joined together by an adhesive. The wire in the wire section can be arranged over a surface
20 provided with adhesive, this surface being either on the upper or lower section of the heating pad.
The wire in the wire section may be provided with adhesive, thus enabling it to be placed on the surface of a lower or upper section which is not provided with adhesive.
25 The wire in the wire section may also be provided with protruding
> flanges provided with adhesive so that the wire can be arranged in loops as desired. Tape may also be used instead of protruding flanges.
Both or either of the opposing surfaces of the upper and lower sections of the heating pad may be provided with adhesive.
OMPI
The upper and lower sections may consist of the same or different materials. Materials suitable for the upper and lower sections are woven fabric, paper, plastic, foam plastic and foam rubber.
Further characteristics-of the present invention are revealed in the following claims.
The present invention will be described more fully with reference to the accompanying two sheets of drawings, in which
Fig.1 shows an exploded view of a heating pad according to the present invention, consisting of an upper section, a lower section and a wire section between them,
Fig.2 shows an assembled heating pad seen from above and
Fig.3 shows the heating pad of Fig.2 seen from below.
In the figures 1 is the lower section of a heating pad, 3 the wire section with an upper loop part 4 and a lower loop part 5, and a connection contact 6. The upper section of the heating pad is desig¬ nated 2. In the present case the lower part 1 is assumed to be foam plastic and is coated with adhesive on the upper surface. Thanks to this, the wire for the wire section can easily be applied on the upper surface of the lower section 1, thus being secured there. The upper section 2 can then be placed over the lower section 1 with wire section 3 and full adhesion is obtained. The upper part 2 also consists of foam plastic.
It should be evident that the lower surface of the upper section 2 may also be provided with adhesive. When parts 1 and 2 are provided with adhesive it is advisable for their adhesive surfaces to be covered by a protective layer or foil which can easily be removed prior to assembly. The wires in the wire section 3 may also be provided with adhesive. The wires in the wire section 3 may be provided on one or. both sides with a flange having an adhesive surface. Said flange may of course be
OMPI
replaced by tape. It should be evident that an uninsulated electric wire may also be used, but in this case the upper and lower sections must provide sufficient insulation.
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