GB1361118A - Method and equipment for continuous folding of flexible sheets - Google Patents

Abstract

1361118 Folding paper POLYGRAPH LEIPZIG KOMBINAT FUR POLYGRAPHISCHE MASCHINEN UND AUSRUSTUNGEN VEB 26 April 1972 19367/72 Heading B8R Apparatus for folding a sheet longitudinally comprises feed roller pairs 21, 22, Fig. 8, and sheet transport members comprising endless plate chains 32, 33, Fig. 7, which conduct the sheet to further feed rollers 36, 37 between lower side guide members 67, Figs. 7 and 8, or 69, Fig. 9, to raise and bring together the side portions 1<SP>1</SP>, 1<SP>11</SP>, Fig. 3b, of the sheet about a fold line 2 to form a junction 14 and define a fold point 5 which travels backwardly along the line 2 as the sheet moves forwards. At the point 5, the guide members cause the sheet to move in an upwardly inclined direction to a pulling unit comprising tapered rollers 42, Figs. 7 and 16, which increase the distance between the upper parts 15, Fig. 16, of successive sheets, whereby a deflector 58, Figs. 16 and 17, can be actuated to guide sheets to either side of a partition 60. Upper guide members. The guide members may co-operate with similarly shaped upper guide members. An upper guide member or hold-down plate 68, Figs. 7 and 12, has a slot through which a spring-urged blade 50 projects to accommodate sheets of different thickness. Air jets may be projected through the guide members 69 to form a cushion for the sheets. The lower guide members may be in the form of rails to support only the side edges of the sheet. Upstanding pins beside the member 68 may be provided to control the fold formation.