Patent ID: 8402566

Claim:
A seam-joining structure ( 1 ) comprising: a first material web ( 10 ) with a first barrier layer ( 42 ) and with a first edge ( 14 ) on an outer boundary of the first material web ( 10 ), a second material web ( 30 ) with a second barrier layer ( 42 ) and with a second edge ( 34 ) on an outer boundary of the second material web ( 30 ), and at least one seam ( 21 ) that joins the first and second material web ( 10 , 30 ) in a seam area ( 3 ) to form a first seam allowance ( 13 ) between seam ( 21 ) and the first edge ( 14 ) of the first material web, and to form a second seam allowance ( 33 ) between the seam ( 21 ) and the second edge ( 34 ) of the second material web ( 30 ), wherein the first and second material web ( 10 , 30 ) are arranged one above the other in the seam area ( 3 ) and the second seam allowance ( 33 ) is folded around the first edge ( 14 ) of the first material web ( 10 ) and covers the at least one seam ( 21 ) to form a seam cover ( 2 ), and wherein the seam cover ( 2 ) is joined to the first material web ( 10 ) in the seam area ( 3 ).