公开(公告)号：US3904187A

公开(公告)日：1975-09-09

申请号：US30160372

申请日：1972-10-27

Applicant: POLYGRAPH LEIPZIG

Inventor： HERTRICH KLAUS ,  FENSKE HORST

IPC: B65H45/18

CPC classification number: B65H45/18 ,  Y10S493/937

Abstract: A sheet-material blank is advanced in a path and from laterally of the path a folding member is advanced slowly towards and into engagement with the blank, whereupon it is accelerated beyond the path to the other side thereof. The deflecting member is then withdrawn and the deflected portions of the blank are engaged between two rollers which rotate in mutually opposite directions and the blank is thereby folded by engagement with these rollers through the nip of which it passes.