Printing – Rolling contact machines – Rotary
Reexamination Certificate
2001-03-30
2003-10-14
Evanisko, Leslie J. (Department: 2854)
Printing
Rolling contact machines
Rotary
C101S227000, C226S092000, C242S562100
Reexamination Certificate
active
06631678
ABSTRACT:
BACKGROUND OF THE INVENTION
Field of the Invention
The invention relates to a web infeed device with decentrally arranged connection stations, in particular, for infeeding material webs into web-processing rotary printing machines.
The published German Patent Document DE 198 02 194 A1 is concerned with a web infeed device for rotary printing machines. This device has a flexible finite infeed element, the length of which is of a somewhat greater dimension than the spacing between two adjacent driving elements. A plurality of the latter are provided for moving the infeed element in guides and switches along the infeed path for the material web to be introduced, sensors being provided along the infeed path for switching on the respectively required driving element, and for simultaneously switching off the driving element that is no longer required. The switch-on and switch-off elements are actuated by the infeed element running past. The infeed element is provided with a coating for reducing the friction in a guide.
The published German Patent Document DE 198 16 510 A1 is likewise concerned with a web infeed device for rotary printing machines. This device includes a flexible finite threading element which introduces a material web along a web path through the components of a rotary printing machine. The infeed element or elements accepting or taking up the front end of a material web have a transport device assigned thereto which passes the components of a respective rotary printing machine, such as, for example, printing units, dryers and chill-roller sections.
U.S. Pat. No. 5,029,742 shows a web threading device, in particular, for introducing a web into a rotary printing machine. In order to prevent teeth from impinging on one another in the case of a meshing worm-wheel gear, a conveying gearwheel is accepted or taken up in a movable bearing on a web infeed system for a rotary printing machine. The gearwheel is subjected to a force acting counter to the direction of movement of the infeed element and is set opposite to the conveying direction of the web infeed element. The improvement known from U.S. Pat. No. 5,029,742 is supposed to provide a web infeed station which is virtually free of wear and is supposed to make it possible for a worm-wheel gear to mesh with a transport gearwheel without excessive wear phenomena.
U.S. Pat. No. 4,987,830 shows a web infeed device for a rotary printing machine. A web infeed device for a rotary printing machine used for newsprint includes a number of guide rails which are connected to one another and are arranged along a multiplicity of web paths. An infeed element is embedded in a guide rail and can be guided along the guide rails along predetermined conveying paths for the material webs. A lever is connected at one end thereof to the web infeed element, and at the other end thereof, has a snap fastener, in order to accept or take up a paper take-up adapter which takes up the leading end of a material web stored on a roll in a web splicer of the rotary printing machine. The guide member is conveyed along the guide rails by propelled and driven wheels which are accepted or taken up along the conveying rails at uniform spaced distances from one another. The guide element has a length, which is of somewhat greater dimension than the spaced distance between adjacent guide rollers.
The devices resulting from the improvements in the state of the prior art referred to hereinbefore have the disadvantage that an infeed element serving for introducing a torn material web into components of a rotary printing machine must be moved from the initial position thereof up to the respective position at which the web tear has occurred. This involves time and effort.
SUMMARY OF THE INVENTION
It is accordingly an object of the invention, in light of the improvements heretofore known from the prior art, to reconnect a material web to a web infeed element simply and quickly, so that as rapid an introduction as possible into the components of a rotary printing machine can occur and, as a result of this, a rapid resumption of production on the rotary printing machine can take place.
With the foregoing and other objects in view, there is provided, in accordance with one aspect of the invention, a device for infeeding a material web into a rotary printing machine, comprising an infeed element for receiving a material web start, the infeed element being introducible onto an introduction path extending at least approximately parallel to a path of the material web in the rotary printing machine, and suspension stations at which the material web is connectable to the infeed element, the suspension stations being assigned to respective components of the rotary printing machine along the path of the material web through the rotary printing machine.
In accordance with another feature of the invention, the infeed element is formed of a movable part, and a suspension segment mounted respectively on one of the suspension stations.
In accordance with a further feature of the invention, the suspension stations are arranged below the path of the material web through the rotary printing machine.
In accordance with an added feature of the invention, the device includes holding devices for the suspension segments provided on the suspension stations.
In accordance with an additional feature of the invention, the holding devices are formed as magnets.
In accordance with a first alternative feature of the invention, the holding devices are formed as suction strips subjectible to a vacuum.
In accordance with a second alternative feature of the invention, the holding devices are formed as adhesive stations.
In accordance with a third alternative feature of the invention, the holding devices are formed as hook-shaped holders.
In accordance with yet another feature of the invention, the suspension segments are mountable stationarily on the holding devices.
In accordance with yet a further feature of the invention, the suspension stations include a cutting device movable transversely to the material web in a cutting gap.
In accordance with yet an added feature of the invention, the movable part of the infeed element is mounted in a parking position.
In accordance with yet an additional feature of the invention, the suspension segment mounted, respectively, on the suspension station is suspended from the movable part which is movable in the guide.
In accordance with still another feature of the invention, the movable part of the suspension element is equipped with stop faces.
In accordance with still a further feature of the invention, the movable part of the suspension element is formed of a flat and flexible metal profile.
In accordance with still an added feature of the invention, orifices conducive to the deformability of the movable part of the infeed element are formed in the movable part.
In accordance with another aspect of the invention, there is provided a material web-infeed device for a web-processing rotary printing machine, comprising an infeed element for receiving a material web start, the infeed element being introducible onto a guide path extending at least approximately parallel to a path of the material web in the rotary printing machine, and suspension stations at which the material web is connectable to the infeed element, the suspension stations being assigned to respective components of the rotary printing machine along the path of the material web through the rotary printing machine.
In accordance with a concomitant aspect of the invention, there is provided a web-processing rotary printing machine, comprising a guide path for an infeed element receiving a start of a material web, the guide path extending at least approximately parallel to a web path of the material web, and suspension stations at which the material web is connectable to the infeed element, the suspension elements being assigned to components of the rotary printing machine along the path of the material web through the rotary printing machine.
The advantages afforded by the improvement according to
Cousin Philippe
Marmin Jean-Claude
Evanisko Leslie J.
Greenberg Laurence A.
Heidelberger Druckmaschinen AG
Hinze Leo T.
Mayback Gregory L.
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