Abstract

A printing apparatus has a printing device having a supply for a substrate to be printed and a supply for ink. The printing device has a printing roll with an image and an anilox roll mounted in a bearing. The anilox roll comprising a cylinder having a surface with a fluid distribution structure for receiving the fluid. The fluid distribution structure has a channel formed in the surface for distributing the fluid over the fluid distribution structure. The channel having a course and opposite channel walls positioned next to each other in a relative parallel oscillating fashion. Printing in a first operational mode, heavy layers of ink on said substrate with relatively large fluid droplets and Printing in a second operational mode, details on said substrate with relatively small fluid droplets.

IPC Classes  ?

• B41F 31/26 - Construction of inking rollers
• A01B 29/00 - Rollers
• B41N 7/06 - Shells for rollers of printing machines for inking rollers
• B23K 26/08 - Devices involving relative movement between laser beam and workpiece
• B41F 31/02 - Ducts, containers, supply or metering devices

Abstract

The invention relates to an anilox roll for a printing apparatus. The anilox roll comprises a cylinder having a surface. The surface comprises a fluid distribution structure for receiving, distributing and transferring a fluid such as an ink. The fluid distribution structure comprises a channel formed in the surface having channel walls. This channel is arranged for distributing the fluid over the fluid distribution structure. The channel comprises channel parts, wherein the courses of connected channel parts are at an angle with respect to each other for preventing a linear distribution of the fluids to be received in a course direction of the channel, allowing a meandering distribution of the fluid to be received in the channel. Side walls of the channel are arranged for allowing a meandering flow of the fluid throughout the fluid distribution surface.

IPC Classes  ?

• B41F 31/26 - Construction of inking rollers
• B41N 7/06 - Shells for rollers of printing machines for inking rollers
• B41F 31/02 - Ducts, containers, supply or metering devices
• B23K 26/08 - Devices involving relative movement between laser beam and workpiece

Abstract

The invention relates to a method and apparatus for forming an anilox roll. The method includes supplying a cylinder of the anilox roll that has an outer surface to be tooled, supplying at least a laser source and laser engraving the outer surface of the anilox roll with a laser spot that is formed by a laser source for obtaining a tooled anilox roll, and applying an optical guide in the light path of the laser for enabling the laser spot to move reciprocally on the outer surface to be tooled.

IPC Classes  ?

• B41F 31/26 - Construction of inking rollers
• A01B 29/00 - Rollers
• B41F 31/02 - Ducts, containers, supply or metering devices
• B23K 26/08 - Devices involving relative movement between laser beam and workpiece
• B41N 7/06 - Shells for rollers of printing machines for inking rollers

Abstract

The invention relates to an anilox roll for a printing apparatus. The anilox roll comprises a cylinder having a surface. The surface comprises a fluid distribution structure for receiving, distributing and transferring a fluid such as an ink. The fluid distribution structure comprises a channel formed in the surface having channel walls. This channel is arranged for distributing the fluid over the fluid distribution structure. The channel comprises channel parts, wherein the courses of connected channel parts are at an angle with respect to each other for preventing a linear distribution of the fluids to be received in a course direction of the channel, allowing a meandering distribution of the fluid to be received in the channel. Side walls of the channel are arranged for allowing a meandering flow of the fluid throughout the fluid distribution surface.

IPC Classes  ?

• B41F 31/26 - Construction of inking rollers
• B41F 31/02 - Ducts, containers, supply or metering devices
• B41N 7/06 - Shells for rollers of printing machines for inking rollers
• B41N 1/06 - Printing plates or foils; Materials therefor metallic for relief printing or intaglio printing