Printing sleeves
US4144812A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 2, 1977 |
| Grant date | Mar 20, 1979 |
| Priority date | — |
| Expiry date | Jun 2, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49863
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
For fitting a printing sleeve in a printing roll the outer surface of the roll core and preferably the inner surface of the sleeve are made with one end of a lesser diameter than the other; the sleeve is slightly undersize diametrically. Remote from the ends of the core are orifices whereby gas under pressure may be blown radially outwardly from the core. The difference in diameter allows the sleeve to be passed freely along the core until it jams up against an increased diameter portion of the outer surface of the roll, at which time it covers the orifices. Gas is then blown from the orifices to expand the sleeve which can then be moved into its working position on the core. A sleeve specially suitable for this treatment is made by laying-up a seamless GRP layer on a former which is undersize for the designed core and either curing a rubber layer in situ onto the layer, or adhesively securing a flexible plate to a true cylindrical outer surface of the GRP layer. A transition between the regions of different diameter of the outer surface of the roll core may be made by a frusto-conical taper (preferably of the order of 5 parts in 10,000 to 20,000) or by at least one step (preferabl…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.