Heidelberger Druckmaschinen Ag

Gerard Guerinet

Jean-Claude Marmin

Thierry Vauchelle

Jean-Claude Calbrix

Jean-Paul Ramond

Louis Deviras

Alain Colin

Sherif Elkotbi

In a folder, a folding cylinder having folding components accommodated on the periphery thereof and being phase-dependently operatable, and cylinder segments for carrying the folding components, the cylinder segments being adjustable in relation to one another and being mounted coaxially in side walls, includes separate drives, respectively, for driving each of the folding components, a rotary leadthrough via which energy is supplied to the separate drives, and a speed controller for speed-dependently controlling the separate drives; a method of operating the folding cylinder; a folder including the folding cylinder; and a rotary printing machine in combination with the folder including the folding cylinder.

Cam-independent drive for folding components

A machine for cutting and folding an uninterrupted printed web of paper to produce folded sections includes a cutting cylinder cooperating with a transfer cylinder. The transfer cylinder is rotationally driven about its longitudinal axis and interacts with a folding cylinder having a set of folding jaws. The transfer cylinder has an external transfer surface interrupted by a number of sets of impaling pins and engaging blades intended to introduce the transversely cut web of paper into the folding jaws. The transfer cylinder also includes means for causing the angular spacing between the engaging blades and the impaling pins to vary. The disclosed transfer cylinder also includes, in the region of its external transfer surface, a set of closure plates on either side of each engaging blade and on either side of each set of impaling pins. The closure plates and the complementary plates may slide with respect to one another, so as to mutually overlap to form a practically continuous external transfer surface, regardless of the angular spacing between the engaging blades and the impaling pins.

Folding machine for an offset printing press

Growing community of inventors

Liancourt, France

Gerard Guerinet