Method and apparatus for the continuous production of infusion bags as well as infusion bag

Abstract

The invention relates to a method for the continuous production of infusion bags, in particular for tea, by depositing single substance quantities ( 3 ) on a filter paper web ( 2 ) and forming a tube as well as forming individual chambers ( 6 ), which are closed on all sides and at least contain one substance quantity ( 3 ), respectively, and which are attached to a carrier material ( 12 ). According to the invention, the chambers ( 6 ) are formed by a transverse seam ( 9 ), which simultaneously comprises the rear seam ( 9 a) of the one infusion bag and the front seam ( 9 b) of the succeeding infusion bag and a perforation ( 9 c) interposed between both seams ( 9 a and 9 b ), at which the infusion bags are separated in course of the process.

1 . Method for the continuous production of infusion bags, in particular for tea, by depositing single substance quantities ( 3 ) on a filter paper web ( 2 ) and forming a tube as well as forming individual chambers ( 6 ), which are closed on all sides and at least contain one substance quantity ( 3 ), respectively, and which are attached to a carrier material ( 12 ), 
 characterized in that the chambers ( 6 ) are formed by a transverse seam ( 9 ), which simultaneously comprises the rear seam ( 9   a ) of the one infusion bag and the front seam ( 9   b ) of the succeeding infusion bag and a perforation ( 9   c ) interposed between both seams ( 9   a ,  9   b ), at which the infusion bags are separated in course of the process.    
     
     
         2 . Method according to  claim 1 , characterized in that the transverse seam ( 9 ) is produced by ultrasound.  
     
     
         3 . Method according to  claim 1  or  2 , characterized in that two corners ( 9   d ) are punched laterally of a central web during the production of transverse seam ( 9 ) and front seam ( 9   b ) is V-shaped.  
     
     
         4 . Method according to one of the claims  1  through  3 , characterized in that the chambers ( 6 ) of the chamber tube are isolated by extension at perforation ( 9   c ) and thereafter attached to a carrier material web ( 12 ).  
     
     
         5 . Method according to  claim 4 , characterized in that the attachment is carried out by welding by means of ultrasound.  
     
     
         6 . Method according to  claim 4  or  5 , characterized in that carrier material web ( 12 ) is perforated before the attachment or simultaneously with the attachment.  
     
     
         7 . Method according to at least one of the claims  1  through  6 , characterized in that the isolated chambers ( 6 ) of two chamber tubes are simultaneously or successively attached to carrier material web ( 12 ).  
     
     
         8 . Method according to at least one of the claims  1  through  7 , characterized in that the chambers ( 6 ) to be attached to carrier material web ( 12 ) are isolated by extension.  
     
     
         9 . Method according to one of the claims  1  through  8 , characterized in that the chambers ( 6 ) are formed by ultrasound welding of at least two filter paper webs, which are placed in parallel to each other and/or superposed.  
     
     
         10 . Apparatus for the continuous production of infusion bags, in particular for tea, comprising a dosing device( 1 ,  1   a ) for substance quantities ( 3 ) and a device for forming a tube, which is divided into single chambers ( 6 ) by transverse sealing, 
 characterized in that in the transverse sealing station ( 5 ,  5   a ) a sonotrode ( 7 ) is arranged, which cooperates with a sealing roller ( 8 ) comprising recesses ( 8   a ) for the substance quantities ( 3 ) contained in the chambers ( 6 ), in order to produce a double seam ( 9 ) separated by a perforation ( 9   c ) and that another station ( 10 ,  10   a ) is provided, in which the chambers ( 6 ) are isolated by extension and attached to carrier material web ( 12 ).    
     
     
         11 . Apparatus according to  claim 10 , characterized in that the other station ( 10 ,  10   a ) is also provided with a sonotrode ( 14 ,  16 ) and a sealing roller ( 11 ,  15 ) for welding the isolated chambers ( 6 ) to carrier material web ( 12 ) by ultrasound.  
     
     
         12 . Apparatus according to  claim 10  or  11 , characterized in that in a similar additional station ( 10   a ) the chambers ( 6 ) of a second chamber tube are welded to carrier material web ( 12 ).  
     
     
         13 . Apparatus according to one of the claims  10  through  12 , characterized in that a separating station ( 17 ) is provided for isolating the sections of carrier material web ( 12 ), which are respectively connected to one or two chambers ( 6 ).  
     
     
         14 . Infusion bag, in particular for tea, formed by at least one chamber ( 6 ) containing a substance quantity of the substance to be leached out and being produced by transverse sealing of a tube made of filter material, and a section of a carrier material web ( 12 ) connected to the chamber ( 6 ), characterized in that the transverse seams ( 9 ) of chamber ( 6 ) and/or carrier material ( 12 ) are welded to the chamber by ultrasound.  
     
     
         15 . Infusion bag according to  claim 14 , characterized in that the transverse seam is formed by a double seam ( 9 ) comprised of a front and a rear seam ( 9   a ,  9   b ) having a perforation ( 9   c ) placed in between.