| 摘要 |
PCT No. PCT/EE96/00001 Sec. 371 Date Jul. 23, 1997 Sec. 102(e) Date Jul. 23, 1997 PCT Filed Jan. 18, 1996 PCT Pub. No. WO96/22874 PCT Pub. Date Aug. 1, 1996A method for closing of the pores of selected areas of the surface of thermo-plastic porous material (7), comprising heating of selected areas of the surface of the porous material (7) by light radiation. Simultaneously, the surface of the porous material (7) is compressed by a transparent smooth body (11). According to the embodiment (I), the surface of the porous material (7) is scanned over by one of the several focused light beams, that are switched on and off. According to the embodiment (II), between the porous material (6) and the smooth transparent body (11), a transparent means containing a light-absorbing pattern (9) of surface elements with pores being left open is placed, whereas the distance between the light-absorbing surface (10) and the surface (7) of the porous material (6) is at least 0.02 mm, or, according to embodiment (III), it is a means with low light-absorption (14) containing a light-absorbing pattern (15) of the surface elements with pores to be closed, that is in good thermal contact with the surface (7) of the porous material (6), and a light of high intensity is conducted through the transparent smooth body (11).
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