Offset printing machine
View Patent ↗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.
1. A shaftless offset printing machine comprising:
at least one printing unit, said printing unit comprising at least two printing groups each composed of a blanket cylinder and an associated form cylinder;
each of said blanket cylinders being driven by a separate motor and being in drive connection via a spur gear with said associated form cylinder; and
a folder unit separately driven by a separate angle-controlled electric motor.
2. The offset printing machine of claim 1 , wherein said folder unit comprises a first folding cylinder, and wherein said first folding cylinder is a knife cylinder.
3. The offset printing machine of claim 2 , additionally comprising one or more further folding cylinders, each said further folding cylinder having a journal and spur gear connected to said journal; and wherein said first folding cylinder has a spur gear operatively connected to said spur gear of said one or more further folding cylinder for driving the same.
4. The offset printing press as in claim 2 wherein the angle-controlled electric motor, the first folding cylinder, and the spur gear of the first folding cylinder are arranged coaxially.
5. A shaftless offset printing machine comprising:
at least one printing unit;
a folder unit having a first folding cylinder;
an angle-controlled electric motor with no drive connection to the at least one printing unit, said printing unit comprising at least two printing groups each composed of a blanket cylinder and an associated form cylinder;
each of said blanket cylinders being driven by a separate motor and being in drive connection via a spur gear with said associated form cylinder; and
a belt drive connecting the angle-controlled electric motor to the first folding cylinder.
6. The offset printing machine as in claim 5 , wherein the first folding cylinder is a pin-folding blade cylinder.
7. The offset printing machine as in claim 5 wherein the folder comprises folding cylinders each having a journal and a spur gear connected to the journal, the first folding cylinder having a spur gear operatively connected to the spur gear of at least said further folding cylinders.