| 摘要 |
<p>PCT No. PCT/SE83/00139 Sec. 371 Date Dec. 12, 1983 Sec. 102(e) Date Dec. 12, 1983 PCT Filed Apr. 15, 1983 PCT Pub. No. WO83/03537 PCT Pub. Date Oct. 27, 1983.An absorbing product comprising a substantially cylindrical cartridge of a web material (13) with a first inner layer (25) and an intermediate layer (24) which merge into each other at a twisted portion (19) at one end of the cartridge, and a third outer layer (27) which connects to the first layer at another twisted portion (26) at the other end of the cartridge. The inner layer defines a closed cavity between the two twisted portions. The invention also relates to method and apparatus for manufacturing the product. The apparatus has a cylindrical mandrel having two co-axially spaced elements (12A, 12B) which are individually rotatable. In one element there is provided a co-axially displaceable member (20) forming a cavity (21) open towards the other element which is tubular to receive the axially displaceable member with a surrounding gap. A pressure member (23) is axially displaceable through said other mandrel element into the cavity. The method comprises the step of arranging a cartridge (17) of web material on the mandrel, a shorter and a longer portion (17A and 17B, respectively) of the cartridge then being rotated to provide an intermediate twisted portion (19). By pressure against said latter portion the longer cartridge portion (17B) is drawn partly into the shorter cartridge portion (17A), the longer cartridge portion then being twisted between the part that has been drawn and the rest of the cartridge portion which is then turn inside out onto the shorter cartridge portion.</p> |
