公开(公告)号：US3669064A

公开(公告)日：1972-06-13

申请号：US3669064D

申请日：1970-02-09

Applicant: BOISE CASCADE CORP

Inventor： HOELZINGER WALTHER J ,  WENNINGER JOHANN ,  MAYER WALTER ,  ZOEGERNITZ KARL ,  SCHROETTER HERMANN ,  BRAUN WERNER

IPC: D21F11/12 ,  B31C11/00 ,  D21H17/33 ,  D21H17/60 ,  D21H17/61 ,  D21H17/66 ,  D21H23/30 ,  D21H23/50 ,  B05B15/04 ,  B31F1/20

CPC classification number: D21H23/50 ,  B31C11/00 ,  D21H17/33 ,  D21H17/60 ,  D21H17/61 ,  D21H17/66 ,  D21H17/71 ,  D21H23/30 ,  Y10T156/1025

Abstract: Apparatus for impregnating longitudinally travelling corrugated board having transversely extending flutes, including suction means arranged adjacent one longitudinal edge of the board for establishing a vacuum in the flutes to draw a material, such as an impregnant, therethrough. The invention is characterized by the provision of retaining means for preventing undesirable lateral displacement of the board in the direction of the suction means. In the preferred embodiment, the retaining means comprise longitudinally extending endless belt means responsive to the vacuum established in the flutes for clamping the moving board against lateral displacement without crushing the flutes or causing damage to the board. Preferably the endless belt means are provided with longitudinal ribs that extend within corresponding grooves in the rollers upon which the belts are mounted, thereby preventing lateral movement of the belt meansand the board-relative to the rollers. In accordance with an important feature of the invention, flow control means are provided for accurately controlling the speed and/or extent of longitudinal penetration of the material through the flutes.