Abstract:
A machine for making absorbent sanitary articles, where each article includes components progressively positioned relative to each other and assembled along a production line. The machine includes a programmable electronic controller device having a shift register, at least one optical inspection system connected to the programmable electronic controller device, and an operator interface connected to the electronic controller. The programmable electronic controller device generates a machine sync signal, a trigger signal for activating the optical inspection system in phase with the sync signal and a shift register shift command. The optical inspection system receives the trigger signal and has a defined maximum response time which produces at least one band of uncertainty. The operator sets with the operator interface the instant of activating the shift register shift command outside the band of uncertainty and between two consecutive sync signals defining a machine step.
Abstract:
In a method for making absorbent sanitary articles, each absorbent article includes a pair of side tabs fed from a single continuous tape divided by oblique cuts into first and second series of side tabs oriented in opposite directions. The side tabs of the first and second series are then fed along a first path and along a second path, respectively and are first rotated by 180° and then combined and transferred separately along a third, common path along which each tab of the first series has a respective tab of the second series placed alongside it to form a pair of side tabs. At least one of the side tabs of each pair is moved sideways such that each pair of side tabs is applied to a continuous web of material at a predetermined spacing.
Abstract:
A device for folding a web for producing absorbent sanitary articles along at least one longitudinal fold line parallel to its feed direction includes two diverting elements positioned on opposite sides of the web one after the other, to operate in succession on respective lateral portions of the web and allow transversal folding of one lateral portion on the other and both on the web. Each diverting element has a diverting surface which is used for folding and which is equipped with a plurality of holes to emit jets of air under pressure at a tangent to the diverting surface, directed transversely to the feed direction of the web along the same direction as the direction along which the two lateral portions are transversely folded by the diverting surface and defining between the latter and the web a laminar fluid bed.
Abstract:
An absorbent sanitary article having a main direction of extension comprises a permeable inner layer, an impermeable outer layer, an absorbent pad interposed between the inner layer and the outer layer and comprising a first layer of non-woven fabric, a second layer of non-woven fabric partly joined to the first layer of non-woven fabric, and an absorbent core interposed between the first and second layers of non-woven fabric; the absorbent core comprises a spread of absorbent polymer material and a third layer of non-woven fabric interposed between the first and second layers of non-woven fabric.
Abstract:
An absorbent sanitary article that includes a permeable inner layer, an impermeable outer layer, an absorbent pad interposed between the permeable inner layer and the impermeable outer layer; the pad includes a first layer of non-woven fabric, a second layer of non-woven fabric partly joined to the first layer of non-woven fabric, an absorbent core interposed between the first and second layers of non-woven fabric, a plurality of seals between the first layer of non-woven fabric and the second layer of non-woven fabric defining in the absorbent pad a plurality of cells; the absorbent core includes a first absorbent material and a second absorbent material divided in the cells; the cells comprise at least a first cell containing the second absorbent material together with the first absorbent material.
Abstract:
The machine according to the invention, for making absorbent sanitary articles, comprises a device for forming inside the absorbent article a pad composed of a plurality of superposed layers of absorbent material, a transfer roller located downstream of the device and having a cylindrical lateral surface, and a wrapping unit which is located downstream of the transfer roller and by which the pad is placed between a first sheet of impermeable or permeable material and a second sheet of permeable material; the transfer roller transfers the internal pad from the forming device to the wrapping unit, the forming device also comprises, for each layer of absorbent material, a respective forming unit for cutting into lengths a continuous web of absorbent material fed into the selfsame unit and for transferring the lengths to the transfer roller; the lengths of material fed by each unit are mutually superposed on the lateral surface of the transfer roller so as to form the layers of the pad and the pad itself.