Printing – Rolling contact machines – Rotary
Patent
1997-02-27
1998-07-14
Fisher, J. Reed
Printing
Rolling contact machines
Rotary
101247, 83343, B41F 1340, B26D 136, B26F 120
Patent
active
057787824
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns a web-fed rotary press for processing webs or sheets of paper, textiles or synthetic materials, running between two counterrotating, jointly operating working rollers of a processing unit, where the mutually tensioned working cylinders are individually and removably connected via their bearing housings on the side to a machine column for the device.
Among other things, this relates to devices for perforating, punching, hole-punching and cutting of the aforementioned materials, which have at least two working rollers or tool cylinders that counterrotate around parallel rotational axes in the approach range and operate jointly as a processing unit.
In this case, the working rollers are supported mutually running on bearer rings or the latter are pressed against each other via side-installed bearing housings for the working rollers or cylinders in such a way that a small gap of approximately 0.2 mm exists between the contact surfaces of the bearing housings.
The pressing against each other of the bearer rings is achieved, among other things, by screwing together the side-installed end plates for the working rollers.
For a perforating unit with perforating tools, another requirement is that the joint operation of two perforating tool components can be stopped by lifting them off, without completely relinquishing the meshing of the opposite arranged driving wheels, by distancing the bearer rings, which is designed to stop or control the operation of the perforating unit or to prevent damage to the glued joint of a paper web.
In addition, it must be ensured that the working rollers can be replaced easily.
At present, the bearer rings are pressed together with respectively at least two screws, assigned to a bearing housing pair, which are arranged at a distance to a plane that runs through the rotational axes for the perforating tools or working rollers.
A block and pulley or the like was required to lift up, lift out or replace a working roller or a cylinder, which did not permit an exact positioning however.
SUMMARY OF THE INVENTION
It is an object of the invention to create a device of the aforementioned type, which can be used universally and permits an exact positioning based on the exacted requirements and the conditions.
The solution according to the invention is that a lifting mechanism is arranged on the machine column for prestressing the working rollers in the operating position, which is designed for the installation and removal from the side.
A balanced prestressing force can be effected with this between the working rollers or in the processing unit and an exact lifting, installation and removal can be carried out.
This involves perforating devices for longitudinal and lateral perforations, meaning with disc-shaped or cylindrical working rollers, punching or stamping devices as well as cutting devices, in particular cross cutters.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is explained in the following with the aid of an embodiment and by referring to the drawing, to which we refer with respect to all details not explained further in the description. Shown in the drawing are:
FIG. 1 A view from the side of a lateral perforation device based on an embodiment according to the invention;
FIG. 2 A cross section along the line 2--2 in FIG. 1;
FIG. 3 An enlarged sectional illustration of a segment along the line 3--3 in FIG. 1;
FIG. 4 A view from the side of the embodiment according to FIG. 1, while the lateral perforation device is not in operation; and
FIG. 5 A view from the side of the embodiment according to FIGS. 1 and 4 in the installed and removed position.
DETAILED DESCRIPTION OF THE INVENTION
FIGS. 1 and 2 illustrate an embodiment of the invention on a lateral perforation device for a paper web 1. For this, the trajectories of the above-positioned lateral perforation cylinder 3 or tool cylinder and a smooth anvil cylinder 4 are indicated in FIG. 1 with dash-dot line circles, whereas the perforating knives 5 are shown in FIG. 2 acro
REFERENCES:
patent: 5060569 (1991-10-01), Gladow
patent: 5588361 (1996-12-01), Riis
Behringer Richard
Rudiger Juergen
Fisher J. Reed
Grapha-Holding AG
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