公开(公告)号：US3669067A

公开(公告)日：1972-06-13

申请号：US3669067D

申请日：1968-09-27

Applicant: BOISE CASCADE CORP

Inventor： ACHERMANN WERNER ,  ACHERMANN FRANZ

IPC: D04H1/655 ,  D04H1/68 ,  D21H21/56 ,  D21H23/30 ,  D21H23/50 ,  D21H23/68 ,  B05C7/02 ,  B05C11/06

CPC classification number: D04H1/655 ,  D04H1/68 ,  D04H13/00 ,  D21H21/56 ,  D21H23/30 ,  D21H23/50 ,  D21H23/68

Abstract: Apparatus for impregnating corrugated cardboard during the manufacturing process forming the said corrugated cardboard. A vacuum is formed within the corrugations of the cardboard and impregnating material is introduced into the corrugations under the influence of the said vacuum. The impregnating material is introduced under conditions which may be varied with respect to composition, temperature, viscosity and other variable process parameters. The apparatus of this invention includes a means for producing a suction on one edge of a corrugated cardboard while introducing impregnating material at the other edge of the corrugated cardboard as it passes through the impregnating apparatus.