Method and device for wrapping multi-sheet printed products

Abstract

A device for wrapping multi-sheet printed products includes a conveyor carrying a multi-sheet printed product, a first rotating drum having a first exterior surface with at least one surface indentation, and a second rotating drum having a second exterior surface, the second roattaing drum interacting with the first rotating drum at a first nip. A first wrapping supply provides first wrapping to the first nip on one side of a multi-sheet printed product and a second wrapping supply provides second wrapping to the first nip on another side of the multi-sheet printed product. A method for wrapping a multi-sheet printed product is aslo provided.

1 . A device for wrapping multi-sheet printed products comprising: 
 a conveyor carrying a multi-sheet printed product;    a first rotating drum having a first exterior surface with at least one surface indentation;    a second rotating drum having a second exterior surface, the second roattaing drum interacting with the first rotating drum at a nip;    a first wrapping supply providing first wrapping to the nip on one side of a multi-sheet printed product; and    a second wrapping supply providing second wrapping to the nip on another side of the multi-sheet printed product.    
     
     
         2 . The device as recited in  claim 1  wherein the second exterior surface has a second indentation, the first and second indentations lining up in the nip.  
     
     
         3 . The device as recited in  claim 1  wherein one of the first or second rotating drums has a knife to cut the first and second wrappings, and the other of the first and second rotating drums has an anvil interacting with the knife.  
     
     
         4 . The device as recited in  claim 1  wherein at least one of the first and second rotating drums are heated to melt the first and second wrapping together around the printed product.  
     
     
         5 . The device as recited in  claim 1  wherein the first wrapping and second wrapping are continuous films.  
     
     
         6 . The device as recited in  claim 1  wherein the first and second exterior surfaces crimp the first and second wrappings together.  
     
     
         7 . The device as recited in  claim 1  wherein the conveyor is a gripper conveyor  
     
     
         8 . The device as recited in  claim 7  wherein the gripper conveyor has grippers releasing the printed products above the nip.  
     
     
         9 . The device as recited in  claim 1  further comprising a full bag sensor downstream from the nip.  
     
     
         10 . A method for forming bags around multi-sheet printed products comprising the steps of: 
 delivering a multi-sheet printed product to a nip of two drums between two wrappings passing through the nip;    passing the multi-sheet printed product and two wrappings through the drum; and    sealing the two wrappings around the printed product using the nip so as to form a bag around the multi-sheet printed product.    
     
     
         11 . The method as recited in  claim 10  further comprising cutting the bag.  
     
     
         12 . The method as recited in  claim 10  wherein the bag is closed at both ends.  
     
     
         13 . The method as recited in  claim 10  wherein the multi-sheet product is a newspaper.