| 摘要 |
<p>Two profile sections 5, 6, such as two sealing, trimming or finishing strips for use in motor vehicle body construction, are joined together end to end by use of a heat-sensitive, air-permeable foil 24 such as made of thermoplastics material. The foil 24 may be provided with a plurality of through slits 24A, or is in some other way rendered air-permeable (e.g. holes punched in the foil 24 by punch 36, see Figures 4 and 5), so that air can pass from one profile section to the other, through the foil 24, in use of the joined profile sections ( e.g. when they are fitted in position or when they are partially compressed to carry out a sealing function), thus preventing pressure build-up and possible bursting of the joint. The profile sections 5,6 may be clamped in respective retaining devices 18,20 and the foil 24 is unwound from a roll 22 into position between the facing ends of the profile sections. Heaters 26,28 may be moved into position for heating the foil 24 and the ends of the profile sections and then withdrawn. The two retaining devices 18,20 may be then moved towards each other so as to move the ends of the two profile sections into contact with opposite sides of the heated foil 24 which thus heat-bonds the end of the profile sections together.</p> |
