Back to results
US 6,408,748 B1Granted
Offset printing machine with independent electric motors
AssigneeMAN Roland Druckmaschinen AG
InventorsJosef Hajek, Johann Königer, Michael Schramm, Peter Gröbner
Life of this patent
Estimating the term…
Abstract
The invention relates to the drive of a printing machine. Cylinders and functional groups are to be driven with low technical expenditure. To this end, all form cylinders (1.1, 1.2) in a printing unit, for example, are driven respectively by separate electric motors (7) and are not in mechanical drive connection.
Claims18
A web-fed offset printing machine comprising
- a plurality of printing units, each said printing unit comprising at least one form cylinder and at least one transfer cylinder, each said cylinder comprising a cylinder body having opposed end faces, and a pair of journals having flanges screwed to respective said end faces, and
- at least one electric motor in drive connection with a respective at least one of said cylinders in each of said printing units, each said at least one of said cylinders not being in mechanical drive connection with any other cylinder in said printing unit which is driven by another electric motor, each said electric motor comprising a rotor which is rigidly connected to one of said journals.
A web-fed offset printing machine comprising
- a plurality of printing units, each said printing unit comprising at least one form cylinder and at least one transfer cylinder, each said cylinder comprising a journal having an end face with a threaded bore, and
- at least one electric motor in drive connection with a respective at least one of said cylinders in each of said printing units, each said at least one of said cylinders not being in mechanical drive connection with any other cylinder in said printing unit which is driven by another electric motor, each said electric motor comprising a rotor having a threaded end shank which is screwed into a respective said threaded bore.
A web-fed offset printing machine comprising
- a plurality of printing units, each said printing unit comprising at least one form cylinder and at least one transfer cylinder, each said cylinder comprising at least one journal,
- a sidewall which carries an eccentric bearing ring which carries a bearing, said journal being journaled in said bearing, said eccentric bearing ring being rotatable relative to said sidewall,
- at least one electric motor in drive connection with a respective at lest one of said cylinders in each of said printing units, each said at least one of said cylinders not being in mechanical drive connection with any other cylinder in said printing unit which is driven by another electric motor, each said electric motor comprising a rotor which is rigidly connected to said journal, and a stator which is fixed with respect to said eccentric bearing ring.
Dependencies are inferred from the claim text.