摘要 |
An apparatus (10, 10a) for ventilating a web of material (12) used in the manufacture of pocketed springs may be removably attached to a pocket coiler (14). The apparatus (10, 10a) has an upper movable portion (26, 26a) which pivots relative to a stationary portion (24, 24a). The stationary portion (24, 24a) may be removably attached to the pocket coiler (14). Each portion has at least one roller, a web of material (12) passing between the rollers during use. One of the rollers (1 06) may have protrusions (68) to create openings in the material (12) before the material enters the pocket coiler (14). |