Method of making an aerosol container

Abstract

An aerosol container includes a main body portion that is constructed and arranged to withstand aerosol pressurization within a range that is about 90-180 prig and a threaded finish portion that is unitary with the main body portion. The threaded finish portion has at least one helical thread, a support ledge beneath the helical thread and a secondary flange that is positioned beneath the support ledge. The secondary flange has an outer circumference that is noncircular in at least one location, whereby it may be engaged during a capping operation to prevent rotation of the container during capping. A method of making an aerosol container in which a preform is capped before the blow molding process is also disclosed.

1 . A method of assembling an aerosol container, comprising:
 providing a container having a threaded finish portion having at least one helical thread, a support ledge positioned beneath the threaded finish portion, the support ledge having at least one position-registering recess defined therein, and a secondary flange positioned beneath the support ledge, the secondary flange having an outer circumference that is noncircular in at least one location;   preventing rotation of the container by engaging the noncircular portion of the secondary flange;   screwing at least a portion of an aerosol dispensing closure assembly onto the threaded finish portion at a torque that is within a range of about 15 in-lbs to about 50 in-lbs; and   pressurizing the container with an aerosol mixture having an aerosol propellant.   
     
     
         2 . The method according to  claim 1 , wherein the support ledge has a first maximum outer diameter and the secondary flange has a second maximum outer diameter, and wherein the second maximum outer diameter is substantially the same as the first maximum outer diameter. 
     
     
         3 . The method according to  claim 1 , wherein the support ledge has a first maximum outer diameter and the secondary flange is a second maximum outer diameter, and wherein the second maximum outer diameter is not substantially greater than the first maximum outer diameter. 
     
     
         4 . The method according to  claim 1 , wherein the secondary flange has at least one substantially flat portion defined thereon. 
     
     
         5 . The method according to  claim 1 , further comprising securing the aerosol dispensing closure against rotation with respect to the container by applying a securement means. 
     
     
         6 . The method according to  claim 1 , wherein the threaded finish portion and the main body portion are fabricated from a material comprising polyethylene terephthalate. 
     
     
         7 . The method according to  claim 1 , wherein a space is defined between the support ledge and the secondary flange, and the space has a minimum vertical dimension that is at least about 1 mm. 
     
     
         8 . The method according to  claim 7 , wherein the minimum vertical dimension is at least about 1.5 mm.