Patent GB-395600-A (GB)
Title: A method and means for the production of longitudinally craped paper
IPC: B31F1/22
Filed: 1932-12-21
Abstract: 395,600. Craping paper. ROSENFELD, H., 22, Sofienstrasse, Mannheim, Germany. Dec. 21, 1932, No. 36255. Convention date, Dec. 21, 1931. [Class 141.] A method and means for the production of longitudinally craped paper by the pushing together of a paper web transversely to its longitudinal direction is characterized in that the action of pushing together is effected intermittently in stages. As shown in Fig. 1, the paper, which is narrowed by an amount d when one fold is produced, is narrowed by an amount nd in the nth stage when n folds have been produced. The folds are formed by devices including upsetting tools which take effect on the paper one after the other, the tools being movable in a direction normal to the direction of travel of the paper. The devices may be fitted directly to one of the usual paper making machines, so that the production of the paper and its craping are effected in continuous operations. In the construction shown in Figs. 5, 6, and 7, the paper P is introduced into the machine from the left, and is gradually drawn by a conveyer band 4 and feed rollers 17 over the whole of the machine, the rollers 17 being of different lengths so that their ends lie in a stepped broken line. Directly opposite each feed roller 17 is arranged an upsetting tool comprising a pusher 19, the ends of which serve to form a longitudinal fold in the paper, and are movable for this purpose transversely to the forward feed direction. The horizontal and vertical motions of the pushers 19 which are carried elastically in guides 30, are controlled by cams 22, 22<1>, arranged on a rotatable roller 23, so that after each fold is formed, the pushers 19 are raised from the paper to complete the return movement to their original position without contact. with the paper, the motion of the pushers being represented by a parallelogram, as shown in Fig. 9. In a modification, as shown in Fig. 10, cam discs 22, 22<1> are keyed to the cam roller 23, the disc 22 for the horizontal motion running between two upright bars 40, and the disc 22<1> for the vertical motion between two horizontal guide bars 41, the bars 40, 41 making up a box formation to the bottom of which is connected a control lever 42 for the pushers 19. Each control lever 42 is pivoted in an adjustable guide 43, the height of which controls the stroke of each pusher 19. In this case, the drive of the feed rollers 17 is effected by a pinion and a racklike toothed gear. In a further modification, as shown in Figs. 14, 15, a number of upsetting tools are arranged one behind the other in the paper path, the tools of one series being staggered in relation to the other series, the tools of each series consisting of revolving discs 60 provided at their edges with projections and indentations. The upsetting tools are arranged loosely and displaceably with mutual distance on a shaft 63, and are so controlled that they first perform a common movement transversely to the paper path, and then move towards one another successively until they make contact with one another, so that each tool serves as a counter-holder for the formation of folds to the tool lying behind it, the transverse displacement of the upsetting tools being effected by a curved cam control driven by the shaft 69 which also drives the discs 60. In a still further modification, the formation of the folds may be effected by drawing together, or pneumatic means may be used instead of mechanical means.