Man Roland Druckmaschinen Ag

Reinhard Mayr

Klaus-Ulrich Lange

Herbert Lutz

Rainer Piller

Erwin Bradl

In a folding blade shaft of a folding cylinder of a drum folding apparatus, the drive shaft and spindle are connected so that the slanting of these parts does not cause any damage to the machine. To this end, the drive shaft and the spindle are connected to each other via a disk packet and centered by a radial rocker bearing.

Folding blade shaft of a folding cylinder

A folding mechanism cylinder having a diameter that can be adjusted during operation of the cylinder. Adjustable bands are arranged on the outer jacket of the cylinder and are moved by rotation of spindles that are connected to the bands by gears. One of the spindles is arranged in the hollow shaft of the cylinder and drives all the other spindles.

Folding mechanism cylinder having an adjustable diameter

To provide for gentle braking by braking fingers (12) located in axial slots between paddle wheel vanes or blades (9, 10) of paddle wheels (8), the fingers have an outer contour which is shaped and dimensioned, at least in the inlet region of gaps (11) for the printed product forming an intersection angle (.alpha.) defined by the axial projection between the contour of the braking fingers and the adjacent inner surface (91) of a vane or blade to continuously increase during rotation of the paddle wheel vanes or disks, to thereby define effective gaps of continuously decreasing width during rotation of the paddle wheel vanes. Preferably, the position of the fingers is adjustable along a predetermined direction (X) by an electrical closed loop positioning system (13 -20, 43), receiving input signals (44, 45) representative of thickness of products and machine speed and, preferably, also emergency control signals (48) to control the position of the fingers with respect to the vanes or blades. Emergency control signals cause withdrawal of the blades to a maximum effective gap position, for example upon tearing of supply belts; increased braking by the fingers, with a narrowed gap, at different axial positions can be used to overcome skew of incoming or delivered products.

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Augsburg, Germany

Reinhard Mayr