Roll for a printing press and process for manufacturing a roll
AssigneeWIFAG Maschinenfabrik AG
InventorsRobert Langsch, Carlo Manta
Life of this patent
Estimating the term…
Abstract
A roll for a printing press has at least two circular partial areas (25, 33) made of an ink-friendly material and at least one circular partial area (23, 34) made of an ink-repellent material, which is arranged between the at least two circular partial areas (25, 33) made of ink-friendly material. A process is provided for manufacturing such a roll, wherein at least two annular structures (25, 33) made of an ink-friendly material and, located between these annular structures, at least one annular structure (23, 34) made of an ink-repellent material are formed on a blank roll body (20, 30).
Claims19
A damping system for a printing press printing a plurality of printing areas transversely across a web, the system comprising:
- a roll with at least two partial areas running around the central axis of the roll, said partial areas being made of an ink-friendly material and at least one annular area made of an ink-repellent material, said annular area made of an ink-repellent material being arranged between said at least two partial areas made of ink-friendly material;
- an oscillator connected to said roll and moving said roll to and fro in an axial direction;
- a plate cylinder receiving damping agent from said roll, said plate cylinder having a plurality of printing areas to print on the printing areas of the web, each said plate printing area being annular and extending uninterrupted in a circumferential direction of said plate cylinder, each said plate printing area printing a different ink, said ink repellent material having a size to prevent mixing of ink between printing areas of said plate cylinder.
A damping system comprising:
- a distributing roll with a plurality of partial areas running around a central axis of said distributing roll, said partial areas being made of an ink-friendly material, an annular area made of an ink-repellent material being arranged between said partial areas made of ink-friendly material, said ink-repellent area extending fully around said central axis of said distributing roll;
- an oscillator connected to said distributing roll and moving said distributing roll to and fro in an axial direction;
- a damping agent transfer roll in contact with said distributing roll and transferring damping agent to said distributing roll;
- a damping agent applicator roll in contact with said distributing roll and receiving damping agent from said distributing roll.
A roll arrangement for a printing press printing a plurality of printing areas transversely across a web, the roll arrangement comprising;
- a roll;
- a plurality of ink-friendly areas mounted on said roll and extending around a central axis of said roll, each of said ink-friendly areas corresponding to one of the plurality of printing areas, said each ink-friendly area having an axial width substantially equal to a width of a respective printing area;
- an ink-repellent area mounted on said roll and extending fully around said central axis of said roll, said ink-repellent area extending uninterrupted in a circumferential direction of said roll, said ink-repellent area being arranged between two of said ink-friendly areas a damping agent transfer roll in contact with said roll and transferring damping agent to said roll;
- a damping agent applicator roll in contact with said roll and receiving damping agent from said roll.
Dependencies are inferred from the claim text.