| 摘要 |
A method of automatically manufacturing bags fitted with complementary closure strips (30, 40) comprises the steps consisting in: supplying at least one moving film (110) adapted to form bag walls; supplying at least one moving closure assembly (10) comprising a W-shaped support sheet (20) constituting both an internal channel-section tamperproofing tape (22) provided on its facing internal surfaces (23, 24) with respective complementary closure strips (30, 40), and also external lateral webs (26, 28) extending beyond the closure strips (30, 40) and the internal channel-section tape (22). The closure assembly (10) also are prefitted with a series of sliders (50) for actuating the closure strips (30, 40) and are distributed along the length of the closure assembly (30, 40) as fed; and fixing the closure assembly (10) formed in this way, via the external lateral support webs (26, 28) to the film (110) forming the bag wall. A machine for automatically manufacturing bags fitted with complementary closure strips (30, 40) for implementing the method. The machine comprises means (112) suitable for supplying at least one moving film (110) suitable for forming bag walls and means suitable for supplying a moving closure assembly (10) comprising a W-shaped support sheet (20) constituting both an internal channel-section tamperproofing tape (22) provided on its facing internal surfaces (23, 24) with respective complementary closure strips (30, 40), and also external lateral webs (26, 28) which extend beyond the closure strips (30, 40) and the internal channel-section tape (22). The closure (10) is also prefitted with a series of sliders (50) for actuating the closure strips (30, 40). Sliders (50) are distributed along the length of the closure strip as delivered. Means (130) is suitable for fixing the resulting closure assembly (10) via its external lateral support webs (30, 40) to the film (110) forming the bag wall. |
