Printing – Inkers – Roller
Patent
1989-10-30
1991-07-16
Burr, Edgar S.
Printing
Inkers
Roller
101247, 101248, 101209, B41F 1324
Patent
active
050315323
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention is directed to a flexographic printing machine. More particularly, the present invention is directed to a flexographic printing machine for printing web materials. Most specifically, the present invention is directed to a flexographic printing machine which is adaptable to various printing formats and sizes. The printing block or plate cylinder is supported in bearing blocks which are secured to a bed. The bearing blocks for the plate cylinder can be removed from the bed and other, different sized bearing blocks substituted therefore. This allows various sizes of printing plate or block cylinders to be used in the flexographic printing machine. Additionally, the position of the bed, which effects the printing pressure between the plate cylinder and the impression cylinder, can be adjusted.
DESCRIPTION OF THE PRIOR ART
Flexographic printing machines are generally well known in the art. These printing devices typically include a printing block or plate cylinder, a screened ink duct roller (anilox type), an ink duct or fountain which supplies ink to the ink duct roller (anilox type), and an impression cylinder. It is often the situation that the prior art flexographic printing machine is intended to be used in a single printing format to print a web or sheets of a given size. Flexographic printing machines of this type are not readily adaptable to different formats and cannot accommodate printing block cylinders that may have various diameters. This lack of adaptability has meant that a flexographic printing machine can only be used with one size of printing block or plate cylinder. Prior attempts to impart printing format flexibility to a flexographic printing machine have required various complex adjustable carriage assemblies which have required horizontal and vertical carriage guidance devices. Such complex structures have generally been unsatisfactory and have not provided a flexographic printing machine which is truly variable in terms of printing format.
It will thus be seen that a need exists for a flexographic printing machine for printing web materials that needs no carriage guidance. The flexographic printing machine of the present invention, as will be discussed shortly, provides such a machine and is clearly an advance in the art.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a flexographic printing machine.
Another object of the present invention is to provide a flexographic printing machine for printing web materials.
A further object of the present invention is to provide a flexographic printing machine that is adaptable to various printing formats.
Still another object of the present invention is to provide a flexographic printing machine that needs no carriage guidance.
Yet a further object of the present invention is to provide a flexographic printing machine having replaceable bearing blocks for the printing plate cylinder.
Even still another object of the present invention is to provide a flexographic printing machine in which the printing plate cylinder can be disengaged from its drive mechanism.
As will be discussed in the description of the preferred embodiment which is set forth subsequently, the flexographic printing machine in accordance with the present invention includes a printing block or plate cylinder, a cooperating impression cylinder and an ink duct roller and ink duct to supply ink to the printing plate cylinder. The plate cylinder is supported in spaced bearing blocks which are carried by horizontal slidable beds. Various printing formats can be attained by changing these bearing blocks to thereby allow the use of different printing block cylinders.
One of the advantages which is attainable with the present invention is that no horizontal or vertical carriage guidance is necessary. Despite the variability in terms of printing format, the impression cylinder and the screened cylinder can be rigidly supported in the lateral frames. Adaptation to other printing formats can be accomplished quick
REFERENCES:
patent: 3491686 (1970-01-01), Zurick
patent: 3738265 (1973-06-01), Saueressig
patent: 4309945 (1982-01-01), Marion
patent: 4362098 (1982-12-01), Stelling et al.
patent: 4384522 (1983-05-01), Ehlers et al.
patent: 4567823 (1986-02-01), Hummel et al.
patent: 4602562 (1986-07-01), Uttenhues et al.
Burr Edgar S.
Keating Joseph R.
Metronic - Geratebau GmbH & Co.
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