Printing – Assembly or disassembly features
Reexamination Certificate
2000-09-26
2001-06-19
Eickholt, Eugene (Department: 2854)
Printing
Assembly or disassembly features
C101S153000, C101S216000, C101S350100, C101S477000
Reexamination Certificate
active
06247406
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a printing unit with more easily removable components. More particularly, the invention relates to a flexographic printing unit with more easily removable cylinders.
It is known that printing units, for example for flexographic printing, are provided with a plurality of printing cylinders: a first cylinder is an inking cylinder which dips into an ink tray in order to draw ink for printing; a second cylinder is a cylinder on which the print to be transferred to paper or another medium is provided; and a third cylinder is the actual printing cylinder, against which the cylinder that bears the type (anilox roller) abuts in order to perform printing on the paper. Finally, a fourth cylinder arranged downstream of the printing cylinder allows to transport the printed paper from one printing unit to a subsequent printing unit or to the outlet at the end of the printing cycle.
Printing units require considerable maintenance both as regards the cleaning to which the various cylinders must be subjected and as regards replacement of the cylinders, particularly the printing cylinder, whose diameter can vary according to the requirements of the users.
Conventional printing units provide for different technical solutions in order to access the various cylinders of the printing unit and therefore be able to remove them.
However, one drawback that is shared by all conventional solutions is the fact that access to the various cylinders, for example the inking cylinder, requires removing not only all the remaining cylinders of the printing unit but also parts of the printing unit itself, with a consequent considerable expenditure of time and difficulty in operation.
This situation worsens if the printing units are arranged in succession and replacement, for example removal of the inking cylinder due to a color change, which accordingly entails cleaning said cylinder, must be performed for each printing unit.
It is easily understandable that a removal operation for a single printing unit which requires a significant amount of time is multiplied by each printing unit that composes the printing machine.
SUMMARY OF THE INVENTION
The aim of the present invention is to provide a printing unit in which the various components of the printing unit can be removed independently of each other and without having to remove fixed parts of the printing unit.
Within the scope of this aim, an object of the present invention is to provide a printing unit in which removal of the various components of the printing unit can be performed in a very short time and without necessarily having to make contact with the printing cylinders and consequently getting dirty.
Another object of the present invention is to provide a printing unit in which the various components can be removed without the aid of particular tools.
Another object of the present invention is to provide a printing unit with more easily removable components which is highly reliable, relatively easy to manufacture and at competitive costs.
This aim, these objects and others which will become apparent hereinafter are achieved by a printing unit with more easily removable components, characterized in that it comprises two outer shoulders, which are adapted to support a printing cylinder, and two inner shoulders, which are pivoted to said outer shoulders so as to pass from an open position to a closed active printing position, said pair of inner shoulders supporting an inking cylinder, a tray which is suitable to contain the ink and is arranged below said inking cylinder, and a cylinder bearing the type, the closure position of said two inner shoulders being such as to move said cylinder bearing the type into abutment against said printing cylinder in order to perform printing and such as to move said inking cylinder into abutment against said cylinder bearing the type.
REFERENCES:
patent: 4019434 (1977-04-01), Hoexter
patent: 4240347 (1980-12-01), Hazelton et al.
patent: 4411194 (1983-10-01), Davidson, Jr.
patent: 4901641 (1990-02-01), Steiner et al.
patent: 5022322 (1991-06-01), Keller
patent: 5101726 (1992-04-01), Lübke et al.
patent: 5363764 (1994-11-01), Horiguchi et al.
patent: 5528986 (1996-06-01), Anderson et al.
patent: 5590598 (1997-01-01), Keller
patent: 5806427 (1998-09-01), Wiemiro et al.
patent: 5979319 (1999-11-01), Hamaoka et al.
patent: 6050190 (2000-04-01), Knauer et al.
patent: 6155166 (2000-12-01), Bertagna et al.
patent: 0 741 025 (1996-11-01), None
D'Annunzio Federico
Maccalli Giacomo
Eickholt Eugene
Gi Due S.r.l.
Josif Albert
Modiano Guido
O'Byrne Daniel
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