Single space rotary printing press for newspapers

Details Single space rotary printing press for newspapers Single space rotary printing press for newspapers

2000-03-27

2001-06-12

Hilten, John S. (Department: 2854)

Printing

Rolling contact machines

Rotary

C101S181000, C074S410000, C074S420000, C074S6650GC

Reexamination Certificate

active

06244175

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a single space rotary printing press for newspapers, and more particularly to such a single space rotary printing press, which has a precision rotary driving force transmission system, and means for adjusting the position of the plate cylinder of each printing unit.
A regular single space rotary printing press is generally comprised of a plurality of printing units arranged at different elevations, belt transmission means respectively coupled between each two adjacent printing units, and a main motor controlled to rotate the printing units through the belt transmission means. The printing units are controlled to print a respective particular color on paper. When a new roll of paper is installed, the position of the plate cylinder of each printing unit should be respectively adjusted subject to the tension of paper used. The plate cylinder position adjusting procedure is achieved manually. This structure of single space rotary printing press has drawbacks. One drawback of this structure of single space rotary printing press is that the transmission belt of the transmission mechanism between each two printing units wears quickly with use. When the transmission belt of the transmission mechanism between two adjacent printing units starts to wear, the printing units cannot be rotated at same speed, causing the printing units unable to print the printing on paper precisely. Further, because the single space rotary printing press has a certain height about equal to the elevation of a three-floor building, it is dangerous and time-consuming to adjust the position of the plate cylinder of each printing unit manually, and difficult to precisely adjust the plate cylinder of each printing unit to the accurate position.
SUMMARY OF THE INVENTION
The present invention has been accomplished to provide a single space rotary printing press for newspapers, which eliminates the aforesaid drawbacks. It is one object of the present invention to provide a single space rotary printing press for newspapers, which uses transmission gearbox to achieve rotary driving force transmission from one printing unit to another. It is another object of the present invention to provide a single space rotary printing press for newspapers, which comprises fine adjustment means for adjusting the position of the plate cylinder of each printing unit precisely by means of the control of a computer. To achieve these and other objects of the present invention, there is provided a single space rotary printing press for newspapers, which comprises a plurality of printing units arranged at different elevations, the printing units each having a plate cylinder with an annular gear at one end, a first transmission gear box and at least one second transmission gear box driven to rotate the printing units, the first transmission gear box having a power input shaft for receiving external rotary driving force and a power output shaft for transmitting external rotary driving force to one printing unit, the at least one second transmission gear box each having a power input shaft for receiving external rotary driving force, a power output shaft for transmitting external rotary driving force to one printing unit, and a transmission shaft for transmitting external rotary driving force to the power input shaft, and an adjustment mechanism coupled between the transmission shaft and the power input shaft for adjusting the position of the plate cylinder of the corresponding printing unit, and coupling means for transmitting rotary driving force from the power output shaft of the first transmission gear box to the transmission shaft of each second transmission gar box.


REFERENCES:
patent: 4311435 (1982-01-01), Bergero
patent: 5634374 (1997-06-01), Depietri
patent: 5771804 (1998-06-01), Knauer et al.
patent: 5865120 (1999-02-01), Gross
patent: 6041670 (2000-03-01), Basstein

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