Patent · US Expired

Sheet-guiding foil as a covering for impression cylinders

US4327135A · kind A · utility

9Cited by

6References

3Claims

0Family size

Assignee

Heidelberger Druckmaschinen AG · DE

Inventors

Arno Wirz · Bammental, DE
Peter Sobotta · Heidelberg, DE
Franz Arendt · Walldorf, DE
Otto K. Gramlich · Mannheim, DE

Key dates

Filing date	Apr 18, 1980
Grant date	Apr 27, 1982
Priority date	—
Expiry date	Apr 18, 2000

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24612
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A sheet-guiding foil as a sheath for an impression cylinder in rotary offset perfecting presses, one surface of the foil being smooth while the opposite surface thereof is formed with spherical calottes of equal height and of statistically uniform distribution, including a chemically resistant, wear-resistant and rigid backing layer with good ink transfer behavior and a textured surface, and a thin chromium layer applied thereto for evening out microroughness, and the method of production.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.