Seamless printing sleeve and method of manufacture thereof
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United States of America Patent
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May 19, 1998
Grant Date -
N/A
app pub date -
Jul 10, 1996
filing date -
Jul 10, 1995
priority date (Note) -
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Abstract
The invention relates to a printing sleeve and a method for producing a sless printing sleeve particularly for a flexo printing cylinder with the printing sleeve being slidable onto a core roll when flexibly expanded by means of a pressurized air cushion and being slidable off therefrom. One method according to the present invention includes the following steps: forming a hollow cylindrical inner sleeve of plastic material with one or more layers with the inner diameter of the inner sleeve being slightly smaller than the outer diameter of the associated core roll; forming a hollow cylindrical outer sleeve of plastic material with one or more layers with the inner diameter thereof slightly smaller than the outer diameter of the inner sleeve; applying a rubber layer to the outer sleeve at the outer circumference thereof; sliding the outer sleeve onto the inner sleeve and while temporarily flexibly expanding the inner diameter of the outer sleeve, and securing the outer sleeve to the inner sleeve by frictional engagement; machining the rubber layer at the outer side thereof, particularly by grinding for a cylindrical circumference; and engraving the outer surface of the rubber layer.
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