Sheet-material associating – Associating or disassociating – Sheet associating
Patent
1989-04-20
1990-11-20
Look, Edward K.
Sheet-material associating
Associating or disassociating
Sheet associating
270 47, 271187, 271315, B65H 3900
Patent
active
049713035
ABSTRACT:
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.
REFERENCES:
patent: 2403062 (1946-02-01), Edwards
patent: 4834361 (1989-05-01), Fenske
"Atlas des Zeitungs-und Illustrationsdruckes"(Atlas of Newspaper and Magazine Printing) by A. Braun, Frankfurt a. M., FED. REP. GERMANY 1960, p. 70.
Lange Klaus-Ulrich
Mayr Reinhard
Look Edward K.
MAN Roland Druckmaschinen AG
Newholm Therese M.
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