Patent · US Expired

Method and apparatus for acquiring covering data of print areas

US5128879A · kind A · utility

15Cited by

7References

7Claims

0Family size

Assignee

Dr. Ing. Rudolf Hell GmbH · DE

Inventors

Helmut Greve · Neumünster, DE
Eckhard Lindemann · Schwentinental, DE
Claus Schmidt-Stoelting · Heikendorf, DE

Key dates

Filing date	Aug 17, 1990
Grant date	Jul 7, 1992
Priority date	—
Expiry date	Aug 17, 2010

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB41F33/0027
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

In the line-by-line recording of films (15') for producing offset printing forms or in the line-by-line exposure of offset printing plates from recording data, i.e. density values of a line, the setting values for the individual zone screws are directly calculated from the density values and are stored or, respectively, directly forwarded to the printing machine (80). Before the forwarding of the setting values to the printing machine (80), density values are advantageously converted into the setting values with masks that, with reference to printing areas, printing surface in the pages (50) and with reference to the register system of the printing machine (80) as well as with reference to the characteristic data of a page (50), contain the allocation of the setting values of the zone screws calculated from the density values of the page (50). These masks can preferably be produced with a PC (60); the setting values can be intermediately stored or can be directly forwarded via an interface to the zone control (70) of the printing machine (80).

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