US 7,921,771 B2Granted

Web-fed printing machine having a turning bar

AssigneeKoenig & Bauer Aktiengesellschaft

InventorGünther Oskar Eckert

Life of this patent

Estimating the term…

Abstract

A web-fed rotary printing machine has at least one printing unit and at least one turning bar that is usable to redirect a travel direction of a web that is to be conveyed. The turning bar has an effective length, for redirecting the web. A projection of this effective length corresponds with the width of the incoming web which is of at least four adjacently arranged printed pages in newspaper format.

Claims21

Dependent claims

A web-fed rotary printing press comprising:

a printing unit located in a path of web travel of a web through said printing press and having a printing unit linear direction of web travel;
a forme cylinder in said printing unit, said forme cylinder having print images of six printed pages arranged side-by-side in an axial direction of said forme cylinder, which forme cylinder axial direction is transverse to said printing unit linear direction of web travel through said printing unit and wherein said web travelling through said printing unit in said printing unit linear direction, and to be imprinted by said forme cylinder, has a width in said axial direction of said forme cylinder of said six printed pages, said forme cylinder of said printing unit being selectively operable in a first mode in which said printed pages are of a first newspaper format having a first page width in said axial direction and said web has a first web width, and in a second mode in which said printed pages are of a second newspaper format having a second page width in said axial direction and said web has a second web width, said second page width being less than said first page width, said second web width printed by said forme cylinder in said printing unit being less than said first web width printed by said forme cylinder in said printing unit;
an offset former assembly in said web-fed rotary printing press and located after, in said path of web travel, said printing unit, said offset former assembly having a former assembly direction of web travel transverse to said printing unit linear direction of web travel and parallel to said forme cylinder axial direction;
a turning bar arranged in a said path of web travel of said web through said printing press and being adapted to reroute said web, said turning bar being located between said printing unit and said offset former assembly and having an effective length whose projection on a width of said web corresponds to said six printed pages in said first newspaper format arranged side-by-side;
a plurality of micro-openings in said effective length of said turning bar for the exit of a fluid under pressure over said effective length of said turning bar, said micro-openings each having a diameter of less than 500 μm;
and
a longitudinal web cutting device after, in said path of web travel said turning bar, and having a plurality of longitudinal cutting knives, at least some of said longitudinal cutting knives being adjustable transversely to said path of web travel in accordance with said newspaper format.

4 more elements

Dependencies are inferred from the claim text.

patentgrep

Loading patent…

Abstract

A web-fed rotary printing press comprising:

a printing unit located in a path of web travel of a web through said printing press and having a printing unit linear direction of web travel;
a forme cylinder in said printing unit, said forme cylinder having print images of six printed pages arranged side-by-side in an axial direction of said forme cylinder, which forme cylinder axial direction is transverse to said printing unit linear direction of web travel through said printing unit and wherein said web travelling through said printing unit in said printing unit linear direction, and to be imprinted by said forme cylinder, has a width in said axial direction of said forme cylinder of said six printed pages, said forme cylinder of said printing unit being selectively operable in a first mode in which said printed pages are of a first newspaper format having a first page width in said axial direction and said web has a first web width, and in a second mode in which said printed pages are of a second newspaper format having a second page width in said axial direction and said web has a second web width, said second page width being less than said first page width, said second web width printed by said forme cylinder in said printing unit being less than said first web width printed by said forme cylinder in said printing unit;
an offset former assembly in said web-fed rotary printing press and located after, in said path of web travel, said printing unit, said offset former assembly having a former assembly direction of web travel transverse to said printing unit linear direction of web travel and parallel to said forme cylinder axial direction;
a turning bar arranged in a said path of web travel of said web through said printing press and being adapted to reroute said web, said turning bar being located between said printing unit and said offset former assembly and having an effective length whose projection on a width of said web corresponds to said six printed pages in said first newspaper format arranged side-by-side;
a plurality of micro-openings in said effective length of said turning bar for the exit of a fluid under pressure over said effective length of said turning bar, said micro-openings each having a diameter of less than 500 μm;
and
a longitudinal web cutting device after, in said path of web travel said turning bar, and having a plurality of longitudinal cutting knives, at least some of said longitudinal cutting knives being adjustable transversely to said path of web travel in accordance with said newspaper format.

4 more elements