Cleaning and liquid contact with solids – Processes – Using solid work treating agents
Reexamination Certificate
1999-11-22
2001-12-25
El-Arini, Zeinab (Department: 1746)
Cleaning and liquid contact with solids
Processes
Using solid work treating agents
C134S009000, C134S015000, C134S018000, C134S032000
Reexamination Certificate
active
06332929
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a method and to a device for cleaning guide rollers in a web-fed rotary printing press. A web of material that carries a cleaning agent is provided with coded information. The coded information is detected by a sensor and is used for controlling the cleaning of the guide rollers.
DESCRIPTION OF THE PRIOR ART
A device for cleaning paper guide rollers of a web-fed rotary printing press is known from DE 37 14 143 C2. In this device, a running paper web, which is not being printed upon, is temporarily wetted with a cleaning fluid, which cleaning fluid is then transferred to the paper guide rollers and thereafter is removed, together with any ink remnants removed from the paper guide rollers, by a following portion of the paper web which is not wetted with the solvent. The, paper web has a speed from that of the circumferential speed of the paper guide roller. This difference in speed different is generated by means of drive motors acting on the paper guide roller.
DE 44 27 816 A1 describes a method for the cleaning of cylinders of a sheet-fed rotary printing press. In this device, dirt on the sheets is used for regulating the cleaning.
EP 0423093 A2 discloses a method and a device for cleaning guide rollers in a web-fed rotary printing press. Here, a web of material is wetted with a cleaning agent. The guide rollers are braked for cleaning.
JP-A-01-031641 discloses a device for the cleaning of rollers in a web-fed rotary printing press. Here, the web of material is additionally provided with a cleaning material and the start and end of the cleaning material are detected by means of a sensor for controlling the cleaning process, for example the application of the cleaning material.
SUMMARY OF THE INVENTION
The present invention is based on the object of providing a method, as well as a device for cleaning guide rollers.
This object is attained by the present invention by the provision of a web of material that is provided with coded information, such as a bar code or a punch code. This information is read by a suitable sensor and is used to control the cleaning of the guide rollers in the web-fed rotary printing press.
The advantages which can be obtained by means of the present present invention lie, in particular, in that the guide rollers are cleaned in the course of the passage of the paper web without it being necessary to perform a prior calculation of the path length between the guide rollers of the special paper web course and the storage of this distance in a computer. No paper guide plans need to be prepared. In this way, the braking of those guide rollers, which had not previously been wetted with cleaning fluid, is also avoided, which otherwise could lead to paper web breaks.
REFERENCES:
patent: 4781116 (1988-11-01), Harada
patent: 3714143 A1 (1987-10-01), None
patent: 3714143 C2 (1987-10-01), None
patent: 0423093 A2 (1990-10-01), None
patent: 62-132644 (1987-06-01), None
patent: 01031641 (1989-02-01), None
patent: 04-329141 (1992-11-01), None
Hartmann Manfred Wolfgang
Michalik Horst Bernhard
El-Arini Zeinab
Jones Tullar & Cooper P.C
Koenig & Bauer Aktiengesellschaft
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