Abstract: An apparatus and related method for forming a single face paperboard web are disclosed. The apparatus of the present invention includes a forming corrugating roll for corrugating flutes on a medium web and a carrier corrugating roll operably connected to the forming corrugating roll for carrying the medium web into contact with a liner web. A bonding nip is defined by the carrier corrugating roll for pressing the liner web into adhering contact with the medium web, thereby forming a single faced web. A steam supplying device, including at least one fluid port in fluid communication with the bonding nip, supplies a low pressure steam against at least one of the liner web and the medium web. The steam supplying device further includes a body having a heated surface facing one of the liner and the medium webs. A primary channel extends within the body and is in thermal communication with the heated surface. A high pressure steam is supplied to the primary channel for heating the heated surface.

Abstract: An apparatus and related method for forming a single face paperboard web are disclosed. The apparatus of the present invention includes a forming corrugating roll for corrugating flutes on a medium web and a carrier corrugating roll operably connected to the forming corrugating roll for carrying the medium web into contact with a liner web. A bonding nip is defined by the carrier corrugating roll for pressing the liner web into adhering contact with the medium web, thereby forming a single faced web. A steam supplying device, including at least one fluid port in fluid communication with the bonding nip, supplies a low pressure steam against at least one of the liner web and the medium web. The steam supplying device further includes a body having a heated surface facing one of the liner and the medium webs. A primary channel extends within the body and is in thermal communication with the heated surface. A high pressure steam is supplied to the primary channel for heating the heated surface.

Abstract: An apparatus and related method for forming a double face paperboard web are disclosed. The apparatus of the present invention includes a heating section upstream from a drawing section. The heating section includes at least one heating plate having an upper surface facing a paperboard web and heated by a plurality of primary channels supplied with steam. A plurality of secondary channels extend through the heating plate intermediate the primary channels and a lower surface of the plate. A plurality of outlet ports communicate with each secondary channel and the upper surface of the heating plate. Steam supplied to the secondary channels exits through the outlet ports thereby producing a steam film between the upper surface of the heating plate and the lower surface of the paperboard web. The steam film substantially reduces frictional forces opposing movement of the web while also dramatically increasing the heat transfer to the paperboard web and accelerating the gelatinization of the glue therein.

Abstract: A single facer including a preheater for conditioning a paperboard web. The preheater is positioned upstream form a corrugating nip and includes an arcuate surface facing the web. A plurality of primary channels are disposed internally within the preheater in thermal communication with the arcuate surface. High pressure steam is supplied to the primary channels for heating the arcuate surface. A plurality of outlet ports extend within the preheater and are in fluid communication with the heated arcuate surface. Low pressure steam is released through the plurality of outlet ports thereby producing a steam film between the heated arcuate surface and the paperboard web. The steam film dramatically increases heat transfer to the paperboard web while also reducing frictional forces opposing movement of the web.

Abstract: An improved half-keystone compression ring for use in an internal combustion engine. The improved ring's bottom side is essentially flat, radially and circumferentially, in the closed operating position.