| 摘要 |
1495678 Resistance heating mats ELECTRICITE NEUCHATELOISE SA 23 May 1975 [13 June 1974] 23050/75 Heading H5H A heating mat is produced by stepwise advancing two parallel non-metallic bands 2, stretching insulated resistance wire 1 perpendicular to the bands 2 to form a meander pattern composed of parallel reaches 1a joined by end loops 1b which protrude beyond the side edges of the bands 2, and securing the parallel reaches 1a to the bands 2 by adhesive tape 3. The step-by-step advancement of the bands 2 can be controlled to create zones of the mat free of resistance wire 1. The wire 1 is wound about retractable bolts 6 of the assembly machine after its end has been secured, e.g. by adhesive tape to one of the bands. Holes 4 are stamped through the advancing bands 2 and adhesive tape 3. These are used for positioning the mats during installation. Connector boxes 5 on the bands 2 connect cold terminal wires to the ends of the heating wire 1. Boxes 5 contain connectors in the form of clips which squeeze on to the wire ends. The mats may be mounted on walls or ceilings and subsequently covered by a finishing surface. Alternatively they may be embedded in plaster panels or can be attached to insulating or non-insulating panels. |
