Spout for flexible thin-walled packagings

Abstract

A thin-walled flexible package ( 1 ) is provided with a spout ( 6 ) comprising a connection portion ( 12 ) and a tube ( 18 ) having an outer surface ( 18 e ) and ending with an outlet mouth ( 20 ). A sacrificial closure ( 200 ) is applied to the spout ( 6 ) to close the outlet mouth ( 20 ). The sacrificial closure ( 200 ) comprises a skin ( 202 ) suitable for sealing engaging the outer surface ( 18 e ) of the tube ( 18 ) at a scaling region having a scaling distance (H) from the outlet mouth ( 20 ). On the outer surface ( 18 e ) of the tube ( 18 ) there is a circumferential dividing line (L 2 ) having a division distance (H 2 ) from the outlet mouth ( 20 ). The scaling distance (H) is less than the division distance (H 2 ).

1 . An assembly comprising:
 a thin-walled flexible package provided with a spout comprising a connection portion and a tube having an outer surface and ending with an outlet mouth;   a sacrificial closure applied to the spout to close the outlet mouth, wherein said sacrificial closure comprises a skirt suitable for sealingly engaging the outer surface of the tube at a sealing region having a sealing distance from the outlet mouth;   wherein on the outer surface of the tube there is a circumferential dividing line having a division distance from the outlet mouth, said dividing line being contained in an annular band of the outer surface, said band being free of projections and divided by said band into an upper band, towards the outlet mouth, and a lower band, on the opposite side; and   wherein said sealing distance is less than the division distance;   wherein said dividing line divides the tube into a lower portion and an end portion provided with the outlet mouth, wherein the skirt engages the end portion;   wherein the spout comprises a thread, protruding from the outer surface of the tube, entirely contained in the lower portion.   
     
     
         2 . The assembly according to  claim 1 , wherein the skirt of the sacrificial closure comprises a lip seal, protruding radially internally, operating on the outer surface of the tube in said sealing region. 
     
     
         3 . The assembly according to  claim 1 , wherein the sacrificial closure is reversibly applicable to the spout. 
     
     
         4 . The assembly according to  claim 1 , wherein the sacrificial closure is irreversibly applicable to the spout. 
     
     
         5 . (canceled) 
     
     
         6 . (canceled) 
     
     
         7 . A method of manufacturing a closure assembly comprising a spout and a sacrificial closure, comprising the steps of:
 making the spout through the following sub-steps:
 providing a mold provided with a first half-cavity and a counter-mold provided with a second half-cavity; 
 joining the first half-cavity and the second half-cavity and thus obtaining a first cavity corresponding to a first portion of the spout, said first portion comprising a connecting portion and a lower portion of a tube; 
 a providing an insert suitable for cooperating with the mold and the counter-mold to obtain a second cavity, corresponding to a complete annular wall for making a second portion of the spout, said second portion corresponding to an end portion of the tube, adjacent to the lower portion, having an outlet mouth, said end portion having an axial length equal to a division distance; 
 making the sacrificial closure provided with a skirt provided with a lip seal, protruding radially internally from the skirt, suitable for operating on an outer surface of the tube; 
 applying the sacrificial closure to the tube to close the outlet mouth, so that the seal engages the outer surface in a sealing region having a sealing distance from the inlet mouth, wherein the sealing distance is less than the division distance.