| 摘要 |
The industrial development of novel products, described by the main patent application and its 1<st> certification of addition, having shown that, due to relatively significant ''differences'' in manufacture, especially of car doors, it was difficult to obtain a correct operation of their movable windows, where there often occur noises and untimely jammings, the present second addition aims to avoid such drawbacks, by combining, with the lips or the tubular ''protuberances'' for sealing, whose profile is ''constant'', over the entire perimeter, other auxiliary and discontinuous sealing lips, so as to have a ''leaking'' effect only at the lower horizontal portion, which is generally wider than elsewhere, which is achieved in a known fashion, during ''extrusion'', by a ''die stock'' of variable profile, ''driven'' in a suitably predetermined fashion. <IMAGE>
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