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AssigneeM.A.E. S.P.A.
InventorMarco ROVELLINI
Estimating the term…
A stretching apparatus of fibre tows in a pressurized steam environment includes an elongated stretching chamber having a generally rectangular section of a low height, within which the tows are treated with saturated or overheated steam at high temperature and pressure and simultaneously undergo a mechanical stretching operation. The stretching chamber has a width sufficient to house multiple tows mutually flanked in a running plane and is formed within a stretching chest made of aluminum. The stretching chest is housed in a supporting structure, having a higher structural rigidity than the stretching chest, which includes a plurality of contact elements apt to determine a predefined position of the stretching chest with respect to a direction perpendicular to the tow running plane and to allow a limited mobility of the stretching chest in the other two mutually perpendicular directions which lie in the plane, length and width respectively.
Stretching apparatus of fibre tows in a pressurized steam environment, of the type comprising an elongated stretching chamber (2) having a generally rectangular section of a low height, within which the tows (T) are treated with saturated or overheated steam at high temperature and pressure and simultaneously undergo a mechanical stretching operation, wherein said stretching chamber (2) is of a width sufficient to house multiple tows (T) mutually flanked in a running plane characterised in that said stretching chamber (2) is formed within a metal stretching chest (1), free to expand in the length and width directions within a surrounding rigid, pressure-resistant supporting structure (3-9), which supporting structure univocally defines the position of said stretching chest (1) in the direction of the height of the same.
Stretching apparatus as claimed in 17, wherein in the upper area of the stretching chamber (2) a heating coil (18) is arranged, which heating coil (18) is fed with overheated steam and is apt to maintain this area constantly above the steam dew temperature.
Dependencies are inferred from the claim text.