US 5,351,615 A · Offset blanket for a grooveless blanket cylinder composed of a carrier plate and a rubber layer placed thereon

Abstract

An offset blanket for a grooveless blanket cylinder for applying a printed image onto web material or sheet material is composed of a carrier plate which has been cut to size and a rubber layer placed on the carrier plate. The beginning and the end of the carrier plate of the rubber layer are connected to each other so that the outer circumferential surface of the blanket is continuous and without gaps. The blanket surrounds the blanket cylinder in the operating position in the form of a sleeve in a frictionally engaging manner but releasably. A register device is provided on at least one end face of the blanket for securely positioning the blanket on the blanket cylinder.

Claims20

Dependent claims

An offset blanket for a grooveless blanket cylinder for applying a printed image on sheet material or web material, the blanket comprising:

a carrier plate which is cut to size;
a rubber layer having a width corresponding to a printing width being placed on the carrier plate, the carrier plate and the rubber layer each having a beginning and an end, the blanket having an outer circumferential surface;
means for bonding the beginning and end of the carrier plate and the beginning and end of the rubber layer to each other such that the outer circumferential surface of the blanket is continuous and gap-free and the blanket forms a sleeve-shape, the sleeve-shaped blanket having end faces and being adapted to be removably mountable on the blanket cylinder in a frictionally engaging manner;
and means for positioning the blanket on the blanket cylinder, the positioning means being provided on at least one of the end faces of the blanket.

1 more element

A method of manufacturing an offset blanket mounted on a grooveless blanket cylinder for applying a printed image on sheet material or web material, the method comprising applying a rubber layer on a plane web-like sheet metal;

cutting the sheet metal including the rubber layer to a size corresponding to a circumference and a width of the blanket cylinder, wherein the cut sheet metal forms a carrier plate;
providing on at least one end face of the carrier plate a means for positioning the blanket on the blanket cylinder;
connecting beginning and end of the carrier plate and connecting beginning and end of the rubber layer such that a sleeve-shaped blanket with a grooveless rubber layer is formed, wherein the beginning and the end of the carrier plate are connected by means of a longitudinal welding seam having a concave shape at an upper side and a lower side thereof;
expanding the sleeve-shaped blanket by applying compressed air against the blanket and sliding the blanket onto the blanket cylinder;
and securing the blanket on the blanket cylinder by switching off the compressed air.

2 more elements

Dependencies are inferred from the claim text.

Offset blanket for a grooveless blanket cylinder composed of a carrier plate and a rubber layer placed thereon

Life of this patent

Offset blanket for a grooveless blanket cylinder composed of a carrier plate and a rubber layer placed thereon

Life of this patent

Abstract

Claims20