Printing – Rolling contact machines – Rotary
Reexamination Certificate
2003-02-14
2003-09-30
Nolan, Jr., Charles H. (Department: 2854)
Printing
Rolling contact machines
Rotary
C101S171000, C101S181000
Reexamination Certificate
active
06626102
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates generally to a synchronous control system for rotary presses having a registering function for adjusting cutting registration and at least longitudinal printing registration among longitudinal and across-the-width printing registration on a paper web, and more particularly to a synchronous control system for rotary presses for multi-color printing on a paper web with a plurality of printing mechanisms driven by independent driving means and cutting the multi-color printed paper web into predetermined printing image units with cutting mechanisms driven by independent driving means, in which cutting registration and at least longitudinal printing registration among longitudinal and across-the-width printing registration on a paper web are adjusted by synchronously controlling independent driving means for printing and cutting mechanisms.
PRIOR ART
What can be considered a synchronous control system for adjusting cutting registration and at least longitudinal printing registration on a paper web, among longitudinal and across-the-width printing registration, for a rotary press for performing multi-color printing on the web with a plurality of printing mechanisms driven by independent driving means, and cutting the multi-color printed web into predetermined printing image units with cutting mechanisms driven by independent driving means is disclosed in Japanese Patent Application Laid-Open No. 6(1994)-47905.
Synchronous control system for similar rotary presses for adjusting at least longitudinal printing registration among longitudinal and across-the-width printing registration on a paper web includes that disclosed in Japanese Patent Publication No. 2866071.
The synchronous control system for rotary presses disclosed in Japanese Patent Application Laid-Open No. 6(1994)47905 has independent driving sections (motors) for driven sections (cylinders) of printing units, and drive control systems for each of the independent driving sections, and it discloses the sections are grouped into printing station groups. Some of the printing station groups are independent from each other, and receive their respective positional references via data buses allocated to the printing station groups. That is, the printing station groups have their respective drive units; each drive unit is connected to a data bus to which a folding unit is connected and controlling the positioning of the individual driving sections for that printing station group and the relative positioning of the individual driving sections.
A control/data processing unit as a high-order master device is connected to the data bus to which the drive unit is connected. This control/data processing unit performs the presetting of target values and target-value deviations, and the processing of actual values, thereby performing target-value control for different printing station groups in such a manner as to maintain coordination among the printing station groups and with the folding unit.
In other words, this rotary press performs the control of operation for each motor of the printing station groups based on the control references given by the drive units and the high-order master device via drive control devices, taking into account the relations with the positional references received from the folding unit.
The synchronous control system of rotary presses disclosed in Japanese Patent Publication No. 2866071 has independent driving means for driving plate cylinders of a plurality of printing units provided for multi-color printing on a paper web, and controls the operation of the plate cylinders by the driving means by feeding back the operating state of the driving means to correct instruction values relating to the drive control using the feedback signal. The synchronous control system also has a control section that reads predetermined marks printed the multi-color printing plate cylinders, detects and calculates shifts in printing images printed by the plate cylinders, and outputs signals corresponding to the shifts. When the instruction values are corrected by the feedback signals, as noted earlier, the instruction values are also corrected by the signals output by the control section, so that the shifts in the longitudinal direction of the paper web with respect to printing images are automatically adjusted.
The synchronous control system for rotary presses disclosed in Japanese Patent Publication No. 2866071 has a plate cylinder axial adjustment mechanism for moving a plate cylinder in the axial direction so that the shifts in the across-the-width direction of the paper web with respect to printing images can be automatically adjusted. The operation of the driving means for the plate cylinder axial adjustment mechanism is controlled based on the signals relating to the axial adjustment of the plate cylinders output by the control section.
Japanese Patent Application Laid-Open No. 6(1994)-47905 gives only a rough outline of the construction and operation of the invention, and does not disclose specific details of control.
For example as for the control of the positioning of individual driving sections in the printing station groups and the control of the mutual positioning between individual driving sections in relation to the positional reference received from the folding unit, it is not disclosed clear for what and how the control is embodied. Even if the control is for correctly matching the mutual relation of printing images, and for correctly controlling the relation of the printing image and cutting/folding, it is not disclosed clearly how the control is embodied.
Although the system disclosed in Japanese Patent Publication No. 2866071 is capable of automatically adjusting printing registration on printing images, does not deal with the automatic adjustment of cutting registration. Cutting registration has therefore been adjusted in the prior art by sampling printed matter after cutting, determining by visual inspection a printing image of a reference color or printing images of various other colors on the sampled printed matter, and adjusting cutting registration, that is, the relationship between the cutting positions and the printing images. This work has involved considerable degrees of skill and time, and a relatively large amount of spoilage has been produced during visual registration adjustment.
The present invention makes it possible, in a rotary press using a paper web, to automatically adjust both cutting registration where the web cutting position by a folding unit or sheeter is adjusted to a proper position with respect to the printing position, and printing registration where accurate superimposition of printing images of different colors is maintained in multi-color printing, based on the detection of predetermined register marks of different colors printed together with the printing images of various colors. The present invention is also intended to eliminate the need for skill, reduce time for cutting registration, and minimize spoilage involved with this work.
SUMMARY OF INVENTION
It is an object of the present invention to solve the problems inherent in the prior art.
It is another object of the present invention, in a rotary press using a paper web, to continuously perform the automatic adjustment of both cutting registration where the web cutting position by a folding unit or sheeter is adjusted to a proper position with respect to the printing position and printing registration where accurate superimposition of printing images of various colors is maintained in multi-color printing, based on the detection of predetermined register marks.
It is a further object of the present invention to eliminate the need for skill and reduce time for both cutting and printing registration, thereby reducing spoilage involved with cutting and printing registration.
The present invention calculates a difference in length between the actual cutting position on a paper web and the correct cutting position on the web when the register mark is detected in the st
McGlew and Tuttle , P.C.
Nolan, Jr. Charles H.
Tokyo Kikai Seisakusho Ltd.
LandOfFree
Synchronous control system having automatic cutting and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Synchronous control system having automatic cutting and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synchronous control system having automatic cutting and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3047944