Method of making dual chamber sachet

Abstract

A dual chamber sachet with a dispensing outlet can be made in a form/fill sequence by attaching the dispensing outlet to the film that is to form the chamber divider wall followed by attaching films that are to form the outer walls of the sachet to the dispensing outlet. The upper and side lateral edges of the sachet then are sealed together to produce a sachet with an open bottom end. The sachet can be produced from three film sources, two film sources with the outer walls being formed from a single film, or from a single film formed into a W-shape. The sachet preferably is filled through the open bottom end and the bottom end then sealed. However the sachet can be top filled through the nozzle. The sachets then are severed one from the other by cutting along a lateral seal and packed into a carton, or preformatted along a lateral seal and cut to produce a string of a set number of sachets. The sachets can have a single use dispensing outlet or a reclosable dispensing outlet. Larger sachets will have a reclosable dispensing outlet.

What is claimed is:  
     
         1 . A method for producing and filling a multichamber sachet comprising: 
 providing at least two sources of film, a first film forming one outer film wall, a second film forming an other outer film wall, and a third film forming an inner film divider wall;    providing a nozzle dispenser outlet having an upper part and a lower part and at least two dispensing channels extending from said lower part-through said upper part;    advancing said inner film divider wall and attaching an edge of said inner film divider wall to said lower part of said nozzle intermediate said at least two dispensing channels; and    advancing said inner film divider wall with said dispensing outlet attached thereto into contact with said one outer film wall and said an other outer film wall; and    attaching said one outer film wall and said an other outer film wall to exterior surfaces of said dispensing outlet; and    sealing the lateral portions of said one outer wall, said an other outer wall and said inner film divider wall together to form a sachet; and    filling said sachet with a substance;    sealing the end of said sachet opposite said nozzle outlet; and    severing said sachets to provide a string of n sachets where n is an integer of about 1 to 50.    
     
     
         2 . A method as in  claim 1  wherein said first film and said second film are from a single film source, a single film from said film source folded longitudinally to form said first film one outer film wall and said second film other outer film wall.  
     
     
         3 . A method as in  claim 2  wherein prior to filling said sachet with a substance the side of said sachet opposite said dispensing outlet is cut open.  
     
     
         4 . A method as in  claim 1  wherein said dispensing outlet is a reclosable outlet.  
     
     
         5 . A method as in  claim 1  wherein said nozzle has a recess on said lower part thereof, said recess receiving said inner film divider wall and being bonded to said inner film divider wall.  
     
     
         6 . A method as in  claim 1  wherein said nozzle has a projection on a lower part thereof, said projection being bonded to said inner film divider wall.  
     
     
         7 . A method as in  claim 1  wherein said nozzle is comprised of two horizontal sections, each horizontal section having one of said two dispensing channels, positioning each of said horizontal sections on an opposite side of said inner film divider wall and attaching each of said horizontal sections on a lower part thereof to said inner divider wall.  
     
     
         8 . A method as in  claim 1  wherein said nozzle is comprised of two horizontal sections, each horizontal section having a portion of said two dispensing channels, positioning each of said horizontal sections on an opposite side of said inner film divider wall an attaching each of said horizontal sections on a lower part thereof to said inner divider wall.  
     
     
         9 . A method as in  claim 1  wherein said nozzle is comprised of three horizontal sections. A first and a second horizontal section having a portion of said two dispensing channels and a third horizontal section comprising a substantially planar divider wall, attaching said substantially planar divider wall to one of said first and second horizontal sections, positioning each of said first and second horizontal sections on an opposite side of said inner film divider walls and attaching each of said horizontal sections on a lower part thereof to said inner divider wall.  
     
     
         10 . A method as in  claim 1  wherein said substance is selected from the group consisting of shampoos, lotions and dentifrices.  
     
     
         11 . A method for producing and filling a multichamber sachet comprising: 
 providing source of film and folding a film from said film source to form a W-shape of a first film forming one outer film wall, a second film forming an other outer film wall, and a third film and a fourth film forming film inner divider walls;    providing a nozzle dispenser outlet having an upper part and a lower part and at least two dispensing channels extending from said lower part through said upper part;    advancing said film inner divider walls and attaching a common edge of said third and fourth film inner divider walls to said lower part of said nozzle intermediate said at least two dispensing channels; and    advancing said inner film divider walls with said dispensing outlet attached thereto into contact with said one outer film wall and said an other outer film wall; and    attaching said one outer film wall and said an other outer film wall to exterior surfaces of said dispensing outlet; and    sealing the lateral portions of said one outer wall, said an other outer wall and said inner film divider walls together to form a sachet; and    filling said sachet with a substance;    sealing the end of said sachet opposite said nozzle outlet; and    severing said sachets to provide a string of n sachets where n is an integer of about 1 to 50.    
     
     
         12 . A method as in  claim 11  wherein prior to filling said sachet with a substance the side of said sachet opposite said dispensing outlet is cut open.  
     
     
         13 . A method as in  claim 11  wherein said dispensing outlet is a reclosable outlet.  
     
     
         14 . A method as in  claim 11  wherein said nozzle has a recess on said lower part thereof, said recess receiving said inner film divider walls and being bonded to said inner film divider walls.  
     
     
         15 . A method as in  claim 11  wherein said nozzle has a projection on a lower part thereof, said projection being bonded to said inner film divider walls.  
     
     
         16 . A method as in  claim 11  wherein said nozzle is comprised of two horizontal sections, each horizontal section having one of said two dispensing channels, positioning each of said horizontal sections on an opposite side of said inner film divider walls and attaching each of said horizontal sections on a lower part thereof to said inner divider walls.  
     
     
         17 . A method as in  claim 11  wherein said nozzle is comprised of two horizontal sections, each horizontal section having a portion of said two dispensing channels, positioning each of said horizontal sections on an opposite side of said inner film divider walls an attaching each of said horizontal sections on a lower part thereof to said inner divider walls.  
     
     
         18 . A method as in  claim 11  wherein said nozzle is comprised of three horizontal sections, first and a second horizontal section having a portion of said two dispensing channels and a third horizontal section comprising said substantially planar divider wall, attaching said substantially planar divider wall to one of said first and second horizontal sections, positioning each of said first and second horizontal sections on an opposite side of said inner film divider walls and attaching each of said horizontal sections on a lower part thereof to said inner film divider walls.  
     
     
         19 . A method as in  claim 1  wherein said substance is selected from the group consisting of shampoos, lotions and dentifrices.