Abstract: Rollers and cylinders that are useable in a rotary printing presses are made using hollow tubular casings having metallic foam cores. The casings and cores are made separately. The cores are then placed inside the casing and the two are secured in a force-transmitting manner.

Abstract: Rollers and cylinders that are useable in a rotary printing presses are made using hollow tubular casings having metallic foam cores. The casings and cores are made separately. The cores are then placed inside the casing and the two are secured in a force-transmitting manner.

Abstract: Rollers and cylinders that are useable in rotary printing presses are made using hollow tubular casing having metallic foam cores. The casings and cores are made separately. The cores are then placed inside the casing and the two are secured together in a force-transmitting manner.

Abstract: Rollers and cylinders that are useable in rotary printing presses are made using hollow tubular casings having metallic foam cores. The casings and cores are made separately. The cores are then placed inside the casing and the two are secured together in a force-transmitting manner.

Abstract: An ink duct for use with a screen roller which comprises a working doctor blade and a closing doctor blade, wherein the working doctor blade has one or both sides partially or completely coated with an unreleasable coating of a low surface energy substance having a surface energy of 10 to 60 mN/m. This coating prevents disruptive ink deposits from forming on the side of the working doctor blade opposite to the ink retaining portion of the ink duct and reaching the doctored surface of the ink metering roller in an uncontrolled or random manner.

Abstract: An ink duct for a rotary printing press wherein all or some of the surfaces of the ink duct are permanently coated with a substance which has a low surface energy of between 10 and 60 mN/m. As well as enabling the ink duct to be cleaned easily, the blending of the printing ink is improved owing to the reduced frictional resistance of the coated parts, which in turn leads to more uniform use of the ink-metering roller.

Abstract: An inker unit for a printing unit of a web-fed rotary printing press has a pair of ink application rollers in direct contact with a forme cylinder and with a central, ink receiving roller. A pair of inking rollers are also in direct contact with the ink receiving roller, and in indirect contact with the ink application rollers through riding rollers. The ink application rollers are thus inked both directly and indirectly from the ink receiving roller.

Abstract: A flexible plate is securable to a cylinder by insertion of fastening tabs, provided on beveled or angled ends of the plate, into cooperatively shaped end positioned pockets on the cylinder surface. The pockets may be formed by insert strips that utilize spaced tines to define the individual pockets.

Abstract: A method and apparatus for threading web materials for use in a web-fed rotary printing press is disclosed. A plurality of finite length, flexible conveyors are secured to the press frame, extend between first and second storage devices, and are guided by suitable guides. Drive motors for transporting the conveyors are positioned at either end of the path of web threading and additional drive motors are positioned intermediate the end motors. The web to be transported is secured to the conveyor and suitable ones of the drive motors are actuated to withdraw the conveyor from the first storage device and into the second storage device whereby the web attached thereto is threaded through the assembly. The path of web threading may be varied by connecting various of the conveyors which extend along differing paths through the press.

Abstract: An apparatus for use in trimming the edges of folded signatures produced in web-fed rotary printing presses is disclosed. The signatures, which may exit from the printing press folder in an overlapping array, are supported from below by a conveyor belt or belts and are held from above by coacting hold-down belts. The signatures so positioned are moved past rotating chipping or cutting tools which remove excess material from the edges of the signatures. Either one or two chipping or cutting tools can be used and the apparatus is capable of trimming without reducing the production speed of the press which may be in the range of 40,000 signatures/hour.