High-rigidity adapter sleeve for printing cylinders
AssigneeERMINIO ROSSINI S.p.A.
InventorFelice ROSSINI
Life of this patent
Estimating the term…
Abstract
An adapter sleeve has an external layer for supporting a printing cylinder carrying data and/or images to be printed. The adapter sleeve has an internal layer defining a bore enabling the sleeve to be mounted onto a rotary mandrel of a printing machine. Each opposite extreme end of the adapter sleeve includes a rigid, load-bearing, radial spacer member disposed between the layers to provide rigidity and indeformability during the use of the sleeve with time. The inner surface of each of the extreme end radial spacer members is defined by rigid and non-deformable material of very low coefficients of dynamic and static friction.
Claims28
An adapter sleeve to be mounted onto the exterior surface of an intended rotary mandrel of a printing machine in order to support a printing cylinder carrying data and/or images to be printed, the adapter sleeve comprising:
- a layered cylindrical body defining a longitudinal axis and having opposed ends and having an internal layer defining a longitudinal bore enabling the sleeve to be mounted on the intended mandrel;
- the layered body further defining an external layer surrounding the internal layer and configured with an outer surface for supporting the printing cylinder;
- at least two rigid, load-bearing, radial spacer members disposed between said layers, one of said radial spacer members being disposed at each of the opposed ends of said layered body, each said radial spacer member being configured to provide rigidity and indeformability during the use of the sleeve with time;
- at least one of said radial spacer members defining at least one hole wherein said hole at least one hole is configured to enable compressed air to be fed onto the outer surface of said external layer to enable a printing cylinder to be mounted thereon;
- and
- wherein the layered body defines at each opposed end thereof an inner surface having a diameter equal to the diameter of the exterior surface of the intended rotary mandrel, and empty space is disposed between the external layer and the internal layer over substantially the majority of the length of the longitudinal axis of the layered body.
An adapter sleeve to be mounted onto the exterior surface of an intended rotary mandrel of a printing machine in order to support a printing cylinder carrying data and/or images to be printed, the adapter sleeve comprising:
- at least two rigid load-bearing end radial spacer members, each said end radial spacer member defining an inner flange, an outer support surface and a radially extending web rigidly connecting said inner flange to said outer support surface, each said inner flange extending axially and defining an inner annular surface and an outer annular surface, a first one of said end radial spacer members being spaced axially apart from a second one of said end radial spacer members such that the inner flange of said first end radial spacer member extends axially toward said second end radial spacer member and the inner flange of said second end radial spacer member extends axially toward said first end radial spacer member;
- wherein each of said inner annular surfaces of each of said inner flanges of each of said first and second end radial spacer members defines a first bore having low static and dynamic friction coefficients that enable the inner annular surfaces of each of said inner flanges of each of said first and second end radial spacer members to slide axially on the exterior surface of the mandrel without expanding said first bore;
- an inner layer extending axially between said first end radial spacer member and said second end radial spacer member, said inner layer having a first end connected to said inner flange of said first end radial spacer member, said inner layer having a second end disposed axially opposite said first end and connected to said inner flange of said second end radial spacer member, said inner layer defining an inner bore being configured and composed to enable the sleeve to be mounted on the mandrel;
- an external layer extending axially between said first end radial spacer member and said second end radial spacer member, said external layer having a first end connected to said outer support surface of said first end radial spacer member, said external layer having a second end disposed axially opposite said first end and connected to said outer support surface of said second end radial spacer member, said external layer being configured and composed with a rigid outer surface for supporting the printing cylinder, said external layer being radially spaced apart from said inner layer and defining an empty space therebetween.
Dependencies are inferred from the claim text.