Abstract: An ink form roller in a printing press is provided including a core, a first layer surrounding part of the core, and a second layer surrounding part of the first layer, the second layer having a durometer hardness greater than the first layer. In addition, an ink form roller in a printing press is provided including a core, and a layer surrounding the core, the layer having a hardness between about 25 Shore A durometer and about 40 Shore A durometer, the layer having an outer surface, the outer surface having a surface roughness of about 30 micro-inches or less. Methods are also provided.

Abstract: Method and apparatuses for measuring and regulating the strain of a material web is disclosed. A material web is passed through a first and second non-slip roller pair. The first and second roller pair form a predefined span. In some embodiments, the angular positions of the first and second roller pair are monitored, and the phase angle between the roller pairs is calculated. The phase angle is directly related to the level of strain in the web, and the velocity of the web is controlled to maintain a phase angle which corresponds with the desired strain level. This maintains a constant strain level in the predefined span. In one embodiment, the strain entering a non-slip roll pair is controlled to be zero. The roll pair then introduces a predefined strain to the span entering subsequent processes.

Abstract: A roll for distributing printing liquid in a printing press is provided. The roll includes a roll core having at least a first and a second axial zone, a first liquid feed for feeding liquid to the first axial zone, a second liquid feed for feeding the liquid to the second axial zone independent of the first axial zone and a porous shell covering the first and second axial zones. A printing press, a method for providing printing liquid through a porous shell of a printing liquid supply roll to a cylinder of a printing press, an inking apparatus and a method for providing ink to an anilox roll are also provided.

Abstract: A roll for distributing printing liquid in a printing press is provided. The roll includes a roll core having at least a first and a second axial zone, a first liquid feed for feeding liquid to the first axial zone, a second liquid feed for feeding the liquid to the second axial zone independent of the first axial zone and a porous shell covering the first and second axial zones. A printing press, a method for providing printing liquid through a porous shell of a printing liquid supply roll to a cylinder of a printing press, an inking apparatus and a method for providing ink to an anilox roll are also provided.

Abstract: An ink form roller in a printing press is provided including a core, a first layer surrounding part of the core, and a second layer surrounding part of the first layer, the second layer having a durometer hardness greater than the first layer. In addition, an ink form roller in a printing press is provided including a core, and a layer surrounding the core, the layer having a hardness between about 25 Shore A durometer and about 40 Shore A durometer, the layer having an outer surface, the outer surface having a surface roughness of about 30 micro-inches or less. Methods are also provided.

Abstract: A trimmer for trimming of a book has a support for supporting the book, a trim blade for trimming an edge of the book, and a reciprocating actuator for moving the trim blade toward the book to trim the edge of the book. The trim blade has a trim blade edge having a first section and a second section, the second section being angled with respect to the first section.

Abstract: A method for controlling a chill roll system in a web printing press includes calculating, based on a web inlet temperature of a web entering a first chill roll of the chill roll system, a dew point temperature of an ink solvent vapor of ink printed on the web is calculated. The inlet coolant temperature of coolant entering the first chill roll is set to temperature value near the calculated dew point temperature. Using a heat transfer model, the flow rate of the coolant through the first chill roll needed to maintain a temperature rise of the coolant through the first chill roll below a predetermined value is determined. The method prevents post-chill marking by sufficiently cooling the web, and sets chill roll temperature profiles to avoid solvent condensation on chill roll surfaces and thereby avoid condensate marking.

Abstract: A lithographic web-fed rotary printing press (1) comprises an apparatus (8a, 8b, 8c, 8d) for diverting a wet printed web (4), e. g. in order to pass it around a downstream printing unit (2b) of the press (1). Each diverting apparatus (8a, 8b, 8c, 8d) includes a diverting roll (I 2) having a hydrophilic surface, to which water solution 14, preferably dampening solution, as it is used in dampening systems of a lithographic rotary printing press, is supplied by a spray nozzle arrangement (22), or by an applicator roller (16) which is in contact with a pan roller (20) for transferring the water solution (14) from a reservoir (18).

Abstract: A lithographic web-fed rotary printing press (1) comprises an apparatus (8a, 8b, 8c, 8d) for diverting a wet printed web (4), e.g. in order to pass it around a downstream printing unit (2b) of the press (1). Each diverting apparatus (8a, 8b, 8c, 8d) includes a diverting roll (12) having a hydrophilic surface, to which water solution 14, preferably dampening solution, as it is used in dampening systems of a lithographic rotary printing press, is supplied by a spray nozzle arrangement (22), or by an applicator roller (16) which is in contact with a pan roller (20) for transferring the water solution (14) from a reservoir (18).