Patent ID: 8414723

Claim:
A method for protecting untrimmed edges of two adjacent paperboards or papers ( 1 , 5 ) continuous in such a way that at least one separate profile ( 3 ) is disposed at a portion to be sealed and the at least one separate profile is sealed to the edges ( 4 ) of the paperboards or papers ( 1 , 5 ), comprising the steps of: disposing the at least one separate profile ( 3 ) between the edges ( 4 ) of the paperboard or paper ( 1 , 5 ) in such a way that a middle part of the at least one separate profile ( 3 ) is left between the edges ( 4 ) of the one of the paperboard or paper ( 1 , 5 ); abutting the edges ( 4 ) of the paperboard or paper ( 1 , 5 ) onto the edge ( 4 ) of the the paperboard or paper ( 1 , 5 ), so that the edges ( 4 ) of the two adjacent paperboards or papers ( 1 , 5 ) are attached abuttingly together via the least one separate profile ( 3 ) and the at least one separate profile ( 3 ) is sealed on both sides of the abutment of the edges ( 4 ) by means of ultrasound, the at least one separate profile ( 3 ) is sealed onto at least one edge ( 4 ) of the paperboard or paper ( 1 , 5 ) so that the least one separate profile ( 3 ) forms a loose bag around the at least one edge ( 4 ) with a space being left between the at least one edge ( 4 ) and the least one separate profile ( 3 ), the least one separate profile ( 3 ) is pressed by a guide ( 10 ) against the at least one edge ( 4 ) to form a desired shape, and then the edges ( 4 ) are attached and sealed abuttingly together each other by ultrasound, so that the edges ( 4 ) of the paperboards or papers ( 1 , 5 ) are separately protected by the least one separate profile ( 3 ).