Patent ID: 6110095
Filing Date: 2000-08-29
Classification: B31F

Abstract:
An apparatus in which a liner paperboard web is heated and brought into adhering contact with adhesive placed on flutes of a single face paperboard web thereby forming a double face paperboard web, said apparatus comprising:a plurality of heating plates defining a substantially planar heated surface facing a lower surface of said liner paperboard web and a remote surface facing away from said liner paperboard web;a heating element in thermal communication with said heated surface for heating said heated surface;a holddown device positioned above said heated surface for applying pressure against an upper surface of said single face paperboard web;a passageway for receiving said liner paperboard web and said single face paperboard web, said passageway defined between said heated surface and said holddown device;a plurality of ports formed within said heated surface and below said holddown device, said plurality of ports in fluid communication with said passageway;a steam source in fluid communication with said plurality of ports;a steam film produced by said plurality of ports and located in said passageway intermediate said heated surface and said liner paperboard web; andwherein said steam film at least partially lubricates said liner paperboard web from frictional contact with said heated surface by forcing said liner paperboard web away from said heated surface, while simultaneously supplying heat to said double face paperboard web.