Method of forming and filling containers

Abstract

A method of forming and filling containers ( 2 ) wherein a first step consists in forming a tubular body ( 3 ) of which a first end is joined to a rigid element ( 6 ) with an opening ( 7 ) capable by means of a relative closure element ( 8 ), and a second end or bottom ( 12 ) is sealed by a weld line ( 13 ) extending transversely to the axis (A) of the tubular body ( 3 ) and presents two flaps ( 15 ) extending from the lateral surface ( 4 ) of the tubular body ( 3 ), and a second step consists in flattening and sealing the flaps ( 15 ) against the bottom ( 12 ); the method also includes a step of injecting a sterilizing liquid into each container ( 2 ), effected between the first step and the second step, and a step of filling the container ( 2 ) subsequent to the sterilizing step.

1 . A method of forming and filling containers ( 2 ) including a first step wherein a blank of paper material furnished with precreased fold lines is formed into a tubular body ( 3 ), of which a first end is joined to a rigid element ( 6 ) with an opening ( 7 ) capable by a relative closure element ( 8 ), and a second end or bottom ( 12 ) is sealed by a weld line ( 13 ) extending transversely to the axis (A) of the tubular body ( 3 ) and presents at least two flaps ( 15 ) extending from the lateral surface ( 4 ) of the tubular body ( 3 ), and a second step in which the at least two flaps ( 15 ) are flattened against and sealed to the bottom ( 12 ), characterized in that it includes a step of injecting a sterilizing liquid into each container ( 2 ), effected between the first step and the second step, and a step of filling the container ( 2 ) effected subsequent to the sterilizing step. 
   
   
       2 . A method as in  claim 1 , wherein the first step of forming a blank of paper material furnished with precreased fold lines includes the step of fashioning a tubular body ( 3 ) with four longitudinal walls ( 5 ), of which a first end is joined to a rigid element ( 6 ) presenting a neck ( 9 ) closable with a suitable cap ( 10 ), and a second end or bottom ( 12 ) is sealed by a weld line ( 13 ) extending transversely to the axis (A) of the container ( 2 ) and presents two triangular flaps ( 15 ) extending from two mutually opposed longitudinal walls ( 5 ) of the container. 
   
   
       3 . A method as in  claim 1 , wherein the filling step is effected between the sterilizing step and the second flattening and sealing step. 
   
   
       4 . A method as in  claim 1 , wherein the filling step is effected after the second flattening and sealing step. 
   
   
       5 . A method as in  claim 1 , including a further step of routing the containers ( 2 ) along two rectilinear parallel branches ( 25 ,  26 ) of respective conveyors ( 23 ,  24 ) passing through a common sterilizing assembly ( 31 ) and a common filling assembly ( 32 ).