| 摘要 |
<p>Two webs 51, 52 of same width are bonded together along peripheries of a plurality of apertures 53, 54 serially arranged in same shape and size on respective one sides of the respective webs 51, 52; these two webs 51, 52 are folded back along center lines transversely dividing the respective webs 51, 52 onto themselves; opposite side edges 57, 57 as well as 60, 60 of these respective two webs 51, 52 are bonded together; and finally these two webs 51, 52 thus bonded together are cut along first and second imaginary lines G-G, H-H extending transversely of the webs 51, 52. <IMAGE></p> |
