Abstract

The invention is about a carcass for a printing blanket, to be used for instance in offset printing, comprising: a fabric stack substrate comprising at least one fabric ply; a first compressible layer deposed atop said substrate, said first compressible layer comprising a moisture cured thermoset polymer matrix having a plurality of closed cells distributed substantially uniformly therein such that said first compressible layer has substantially uniform compression characteristics; a separation layer made of either natural or synthetic fibers, or of a mix of the two; a second compressible layer deposed atop said separation layer, of structure and thickness similar but not necessarily the same as those of the first compressible layer; and a top fabric stack deposed atop said second compressible layer comprising at least one fabric ply. The invention is also about a complete printing blanket, comprising the carcass described above and an elastomeric printing face.

IPC Classes  ?

• B41N 10/04 - Blanket structure multi-layer
• B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary

Abstract

In a typographic plate cylinder comprising a groove or gap (11) for assembly of a coating, which in turn comprises two flaps (211 and 211' ), which, when bent and inserted into a groove or gap of the cylinder, form a gap in the coating; a completion element is provided comprising an elongated element (23) designed to be inserted and remain jammed in the gap, without projecting radially from the coating, so occluding the gap.

IPC Classes  ?

• B41F 27/12 - Devices for attaching printing elements or formes to supports for attaching flexible printing formes

Abstract

The coating for a printing machine blanket cylinder, comprises a multilayer structure comprising a printing blanket layer of the type suitable for the type of printing machine and an underlying elastomer layer having such physical/chemical characteristics that the body of the elastomer layer has self -levelling capacities and such thickness that combined with the thickness of the printing blanket layer it allows to maintain the desired overall thickness for the multilayer structure, a first face of the elastomer layer being integrally joined with the printing blanket layer, and a second face of the elastomer layer having a direct adhesion capacity and without requiring the interposition of additional adhesive products with the cylinder capable of adhering both in static and dynamic conditions at least sufficient to guarantee the maintenance of a perfect adhesion against the cylinder on one side and an easy removal from the same on the other.

IPC Classes  ?

• B41N 10/06 - Blanket structure facilitating fastening to, or location on, supports
• B41N 10/04 - Blanket structure multi-layer

Abstract

Described herein is a method for providing the coating (metal-back printing blanket) of a typographic printing roll, said coating comprising a metal layer, one or more upper layers, and a sheet of plastic material on the bottom surface of the metal layer, the method comprising the step of sealing one or more edges of the plastic sheet to the metal layer by means of an adhesive tape applied between the edge of the plastic sheet and the metal layer.

IPC Classes  ?

• B41N 10/04 - Blanket structure multi-layer

Abstract

Described herein is a method for providing a metal-back printing blanket with self-adhesive plastic sheet, made to adhere to the metal layer of the printing blanket with adhesive of the PSA (Pressure Sensitive Adhesive) type, comprising a step of sealing one or more edges of the plastic sheet via -application of an adhesive tape on said edges.

IPC Classes  ?

• B41N 10/04 - Blanket structure multi-layer

Abstract

Described herein is a method for providing a coating (metal-back printing blanket) of a typographic printing roll with a thermo-adhesive plastic sheet comprising the steps of: application of a layer of heat-sealable material on the side of the sheet of plastic material that will come into contact with the metal layer, and thermo-adhesion of the plastic sheet to the metal layer.

IPC Classes  ?

• B41N 10/04 - Blanket structure multi-layer

Abstract

There is described a method and product thereof for the manufacturing of blankets for printing cylinders, in which the gap (2), obtained by the radial alignment of the joints of different intermediate layers (3), is filled with compressible material (5), before the overlapping of the last rubber layer (6) and the steps of curing and rectifying.

IPC Classes  ?

• B41N 10/02 - Blanket structure
• B41N 10/04 - Blanket structure multi-layer