Sheet-fed offset printing press for printing on both sides of sheets
AssigneeHeidelberger Druckmaschinen AG
InventorThomas Schmidt
Life of this patent
Estimating the term…
Abstract
A sheet-fed offset printing press for printing on both sides of sheets has a compact construction and permits a number of color separations to be printed over one another in recto printing or recto and verso printing in a flexible manner and with high print quality. A plurality of printing units, which are disposed behind one another, each include at least one form cylinder, a transfer cylinder, a first impression cylinder and an inking unit having at least one ink applicator roll associated with the form cylinder. A second impression cylinder, which interacts with the transfer cylinder and the first impression cylinder, is provided in at least one printing unit.
Claims15
A sheet-fed offset printing press for printing on both sides of sheets, the printing press comprising:
- a plurality of printing units disposed behind one another;
- each of said printing units including at least one form cylinder, a single transfer cylinder, a first impression cylinder and an inking unit having at least one ink applicator roll associated with said form cylinder;
- at least one of said printing units having a second impression cylinder interacting with said single transfer cylinder and said first impression cylinder;
- said single transfer cylinder configured to be thrown off said first impression cylinder while said second impression cylinder is thrown on said single transfer cylinder and said first impression cylinder;
- said first and second impression cylinders both configured to be engaged and disengaged only by said single transfer cylinder;
- said form cylinder and said single transfer cylinder configured for changing rotational directions;
- and
- said form cylinder and said single transfer cylinder configured for displacing phase positions relative to said impression cylinders.
Dependencies are inferred from the claim text.