B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
270/30
B65H 39/00 (2006.01) B65H 29/40 (2006.01) B65H 29/68 (2006.01)
Patent
CA 1326499
ABSTRACT OF THE DISCLOSURE. 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 sytem (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.
597321
Lange Klaus-Ulrich
Mayr Reinhard
Frayne & Company Robert
Man Roland Druckmaschinen Ag
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