Printing – Antismut device – Contact preventers
Patent
1997-03-07
1998-12-01
Funk, Stephen R.
Printing
Antismut device
Contact preventers
1014161, 492 48, B41F 2100, B41F 2200
Patent
active
058424121
ABSTRACT:
An anti-marking covering for use on a printing press transfer cylinder to prevent ink marking of printed sheets is made of a material having a high axial air permeability through the material parallel to its surface and a substantially uniform surface structure free of raised areas. A preferred material is 100% rayon hydroentangled nonwoven fabric subjected to comb-roll microcreped compressive forming of microcreped areas closely spaced about 1/16 inch apart. The preferred fabric has an axial air permeability of about 0.279 cfm. When the material is wrapped tightly onto a press cylinder, the high axial air permeability allows an air layer to be maintained under the printed sheets, and the uniform surface structure is free of high points that might protrude through the air layer and contact the printed sheets. Other fabrics and materials suitable for the anti-marking covering include woven and knitted fabrics, nonwoven fabrics, and open-celled foam. The preferred materials have an axial air permeability not less than about 0.138 cfm, and a surface structure with closely spaced features of a spacing not more than about 0.125 inch.
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Chiricosta Robert A.
Elsea Deborah L.
Greenway John Michael
Higgins Thomas
BBA Nonwovens Simpsonville, Inc.
Funk Stephen R.
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