Printing – Rolling contact machines – Rotary
Reexamination Certificate
2001-10-01
2003-11-11
Colilla, Daniel J. (Department: 2854)
Printing
Rolling contact machines
Rotary
C101S480000, C400S621000, C400S635000, C271S264000
Reexamination Certificate
active
06644186
ABSTRACT:
BACKGROUND OF THE INVENTION
Field of the Invention
The invention relates to a copy-guiding device for flat copies in folders, the copies being severed by cutting devices in the folders from single-layer or multi-layer material webs, and folded.
The published European Patent Document EP 0 400 596 A3 is concerned with a cutting device for a folder in a rotary printing machine. The cutting device includes two cooperating cutting cylinders for a material web which runs vertically into the pair of cutting cylinders, and transport tape lines arranged downline from the cutting cylinders, as viewed in a travel direction of copies through the folder. The transport tape lines run over deflection rollers and guide the cut-off products therebetween. In order to provide a guide for an exact entry of the products between the transport tape lines, blowing or blast nozzles directed into the cutting nip between the web and the cutting cylinder are provided on both sides of the incoming web, and cutting cylinders with grooves for passage of the blown air are provided parallel to the web.
In another construction, there is provided a device for guiding signatures, in particular in the vicinity of an outlet wedge of a cutting cylinder arrangement in a folder disposed downline from a rotary printing machine, as viewed in the copy travel direction. According to this construction, one or more guide tapes extending at least approximately transversely to the transport direction of the signatures are arranged close to the transport path of the signatures and define guide surfaces limiting the transport path of the signatures.
U.S. Pat. No. 5,839,365 and French Patent 2 751 630 disclose a copy guide for a folder having a pair of cutting cylinders with a cutting nip therebetween wherein individual flat copies are severed from a continuously supplied material web. Downwardly extending transport tapes are guided over deflection rollers for the purpose of onwardly conveying the severed, individual folded copies. Assigned to the cutting cylinders of the cutting-cylinder pair is a product guiding unit which extends at least partly over the width of the material web to be processed. The open space or clearance extending from the cutting nip to the inlet nip and into transport tapes disposed downline from the cutting cylinders is bridged by the stationary product guiding unit arranged underneath the cutting-cylinder wedge.
A disadvantage of a stationary copy guide lies primarily in that the adaptability thereof to changing production parameters, such as a greater paper thickness or a greater number of streams within a material web, and also web widths to be processed flexibly, are achievable only with considerable difficulty, because the fixedly mounted copy guide has to be shifted manually. This, firstly, requires an expenditure of set-up time and, secondly, necessitates production outages or shut-downs in the rotary system. It has been shown that a permanently predefined guide, at least approximately configured as a stationary former, only inadequately takes variable production requirements into account.
SUMMARY OF THE INVENTION
In view of the inadequate remedies suggested heretofore in the prior art, and the technical problem indicated, it is an object of the invention to provide a product guide for flat copies in a folder, which is adjustable based upon the width of the material being processed and, beginning at a specific speed level, is automatically movable into an outlet wedge located downline from a cutting-cylinder pair, as viewed in a travel or conveying direction of the copies.
With the foregoing and other objects in view, there is provided, in accordance with one aspect of the invention, a device for guiding copies severed from a material web in a folder by a cutting-cylinder pair, comprising revolving transport tapes for picking up the copies after they have passed through a copy guide arranged in an outlet wedge of the cutting-cylinder pair, the copy guide extending at least partly over the width of the material web, and being formed of copy guide sections which are automatically adjustable, both with respect to the width of the copies to be guided and with respect to a passage cross section for the copies to be guided.
In accordance with another feature of the invention, the copy guide sections of the copy guide have, at an end thereof facing towards an outlet wedge of the cutting-cylinder pair, a greater cross section than at an exit from the copy guide sections, which is located opposite an inlet nip of the transport tapes.
In accordance with a further feature of the invention, the copy guide sections are disposed in the shape of a funnel extending in a copy-conveying direction.
In accordance with an added feature of the invention, the copy guide sections are disposed so as to be movable on the guide elements.
In accordance with an additional feature of the invention, the device includes a shaft mounting, and spring elements supported on the shaft mounting, the guide elements being prestressed on guide rods by the spring elements.
In accordance with yet another feature of the invention, inner surfaces formed on the copy guide sections are movable between a first nip width and a second nip width.
In accordance with yet a further feature of the invention, the copy guide sections are formed with inner surfaces, and include a friction-reducing coating provided on the inner surfaces, respectively.
In accordance with yet an added feature of the invention, the copy guide sections are formed with rounded inlet edges on a side thereof disposed opposite the outlet wedge of the cutting-cylinder pair.
In accordance with yet an additional feature of the invention, the copy guide sections are movable between a first position and a second position in the outlet wedge, perpendicularly to a conveying direction of the copies.
In accordance with still another feature of the invention, the device of the invention includes toothed sections and formlocking drives interacting therewith for moving the copy guide sections perpendicularly to a conveying direction of the copies. In this regard, it is noted that a formlocking connection is one which connects two elements together due to the shape of the elements themselves, as opposed to a force-locking connection, which locks the elements together by force external to the elements.
In accordance with still a further feature of the invention, the device of the invention includes a mounting for accommodating the drives, and an actuator for setting the mounting so that the copy guide sections are located in a rest position outside a conveying plane of the copies.
In accordance with still an added feature of the invention, the copy guide sections are automatically transferrable from the first position thereof into the second position thereof at production speeds above 35,000 copies per hour.
In accordance with still an additional feature of the invention, the first position is attained at production speeds of <35,000 copies per hour.
In accordance with another aspect of the invention, there is provided a folder having a device for guiding copies severed from a material web by a cutting-cylinder pair, comprising revolving transport tapes for picking up the copies after they have passed through a copy guide arranged in an outlet wedge of the cutting-cylinder pair, the copy guide extending at least partly over the width of the material web, and being formed of copy guide sections which are automatically adjustable, both with respect to the width of the copies to be guided and with respect to a passage cross section for the copies to be guided.
In accordance with a further aspect of the invention, there is provided a folder for pinless processing of copies, having a device for guiding copies severed from a material web by a cutting-cylinder pair, comprising revolving transport tapes for picking up the copies after they have passed through a copy guide arranged in an outlet wedge of the cutting-cylinder pair, the copy guide extending at least partly over the width of the mate
Herrou Eric
Maresse Alain
Melon Thierra
Colilla Daniel J.
Culler Jill E
Greenberg Lawrence A.
Heidelberger Druckmaschinen AG
Mayback Gregory L.
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