Patent Grant
6941849
The invention relates to a device for adjusting the phase of perforating devices as a function of the folding mode, the device being accommodated, for example, in a folder disposed downline from a rotary printing machine.
In the prior art exemplified by the published Japanese Patent Document JP-Hei-6-211424, there is disclosed a perforating device for perforating tools in the folder of a rotary or web press. With the aid of the advancement in the art proposed therein, a correction may be made of the deviation of the position of cross-perforations on the inner and outer side of folded copies, by the displacement relative to a perforation formed on the inside of the folded copy, of the position of a cross-perforation formed on the outside of the copy. For this purpose, a folding cylinder having a diameter threefold that of a standard printing-unit cylinder, i.e, a plate, blanket or impression cylinder, is provided in a folder, and the rotation thereof is transmitted to a cylinder having the standard or single diameter, a unit for changing the rotational angle being provided between the aforementioned cylinders. This unit comprises a first draw or pull-roller pair, a pick-up cylinder of single diameter, a further draw or pull-roller pair and, in addition, a double gear wheel constructed with a double diameter. By the use of a sprocket gear mechanism assigned to the perforating cylinder of single diameter, following the perforation of one side of the folded copy, the other side of the folded copy is provided with an offset relative to the cross-perforation first applied. In this configuration, no provision is made for adjusting the depth of perforation transversely with respect to the web travel direction, of the cylinders that accommodate the perforating tools.
The German Patent Document DE 43 27 446 A 1 discloses a device for cross-perforating. This is proposed for a folder which is equipped with two cross-folding devices. Provision is made for pairwise mutually cooperating perforating knives and perforating strips, respectively, on perforating cylinders. An adjustment of the device during the operation of the machine is effected via a perforating cylinder of bipartite construction and via a perforating cylinder of unipartite construction. Adjustment of all the perforating knives, respectively, in the correct position relative to the cross-folds, or of all the perforating knives and the perforating strips associated with the first cross-fold, and finally adjustment of all the perforating knives and all the perforating strips, is possible.
In order to adjust the cross-perforations, spur-toothed and helically-toothed gear wheels, respectively, which are displaceable relative to one another are accommodated in up to four gear-train planes on the side walls of the folder that accommodates the perforating device. This construction, on the one hand, takes up a great deal of installation space and, on the other hand, requires a great number of mechanical parts, not just gear wheels but also shafts, shaft bearings and keyed connections and clutches, having to be provided, which cause the outlay for the device to appear to be very high.
In view of the aforecited prior state of the art, it is an object of the invention to provide a device for adjusting the phase of perforating devices as a function of the folding mode having a construction that is kept significantly simpler than heretofore for adapting the position of the cross-perforation to the position of the cross-fold, while the machine is running, in a folder which is operatable in different folding modes.
With the foregoing and other objects in view, there is provided, in accordance with one aspect of the invention, a device for perforating material webs by perforating tools accommodated on perforating cylinders and capable of producing perforations on copies in an exactly correct position with respect to cross-folds formed in the copies, the perforation position being adjustable during machine operation, the perforating tools being cooperatively related with associated perforating strips for producing transverse or cross-perforations, comprising at least one perforating bar disposed coaxially with at least one of the perforating cylinders, the perforating tools and the perforating strips being accommodated on at least one of the perforating bars, the at least one of the perforating cylinders being adjustable relative to at least another of the perforating cylinders.
In accordance with another feature of the invention, the perforating bar is mounted on a cylinder shaft extending through the one perforating cylinder.
In accordance with a further feature of the invention, the one perforating bar is adjustable in a direction opposite to the direction of rotation of the one perforating cylinder.
In accordance with an added feature of the invention, a perforating tool and a perforating strip are accommodated stationarily on the periphery of the one perforating cylinder.
In accordance with an additional feature of the invention, a perforating tool is accommodated on the one perforating bar on the one perforating cylinder, and is cooperatively related with a perforating strip accommodated on the other cylinder which is located opposite the one cylinder.
In accordance with yet another feature of the invention, a perforating tool for a delta-folding mode is accommodated on the one perforating bar on the one perforating cylinder, and is cooperatively related with a perforating strip accommodated on the other cylinder which is located opposite the one cylinder.
In accordance with yet a further feature of the invention, a perforating tool is accommodated on another perforating bar on one of the perforating cylinders, and is cooperatively related with a perforating strip accommodated stationarily on the periphery on another of the perforating cylinders located opposite the one perforating cylinder.
In accordance with yet an added feature of the invention, the perforating strips are mounted on further perforating bars extending coaxially with respect to the perforating cylinders and adjustable relative thereto.
In accordance with yet an additional feature of the invention, the perforating device includes at least another perforating bar, the perforating bars being accommodated in mounting supports on cylinder shafts of the perforating cylinders.
In accordance with still another feature of the invention, the perforating cylinders have respective cylinder shafts, and transmission elements are included on the cylinder shafts, the transmission elements being actable upon by a common adjusting unit.
In accordance with still a further feature of the invention, the transmission elements are constructed as a coulisse or slotted guide.
In accordance with still an added feature of the invention, the transmission elements have at least one force transmission point.
In accordance with still an additional feature of the invention, the transmission elements have at least another force transmission point, the force transmission points being constructed as toothings.
In accordance with another feature of the invention, the perforating device includes, between the transmission elements of the perforating cylinders, a compensating device for permitting eccentric adjustment of one of a pair of the perforating cylinders relative to a perforating nip located therebetween.
In accordance with a further feature of the invention, the perforating device includes a stationary perforating cylinder and an adjustable perforating cylinder, a drive and a transmission element for the adjustable perforating cylinder, and an articulated connection between the drive for the adjustable perforating cylinder and the transmission element therefor.
In accordance with another aspect of the invention, there is provided a folder having a device for perforating material webs by perforating tools accommodated on perforating cylinders and capable of producing perforations on copies in an exactly correct position with respect to cross-folds formed in the copies, the perforation position being adjustable during machine operation, the perforating tools being cooperatively related with associated perforating strips for producing transverse or cross-perforations, comprising at least one perforating bar disposed coaxially with at least one of the perforating cylinders, the perforating tools and the perforating strips being accommodated on at least one of the perforating bars, the at least one of the perforating cylinders being adjustable relative to at least another of the perforating cylinders.
In accordance with a concomitant aspect of the invention, there is provided a pin-less folder having a device for perforating material webs by perforating tools accommodated on perforating cylinders and capable of producing perforations on copies in an exactly correct position with respect to cross-folds formed in the copies, the perforation position being adjustable during machine operation, the perforating tools being cooperatively related with associated perforating strips for producing transverse or cross-perforations, comprising at least one perforating bar disposed coaxially with at least one of the perforating cylinders, the perforating tools and the perforating strips being accommodated on at least one of the perforating bars, the at least one of the perforating cylinders being adjustable relative to at least another of the perforating cylinders.
Advantages which can be achieved by the features according to the invention are many and varied. On the one hand, mounting the perforating bars on the perforating cylinders permits considerable simplification of the adjusting device for changing the phase angle of the perforating bars during machine operation, relative to the perforating cylinder, and on the other hand, the drive of the perforating bars is considerably simplified. In addition, by the features proposed in accordance with the invention, the setting or adjustment of the perforating depth, i.e., the extent of penetration of the perforations, in particular for multi-layer material webs, can be simplified.
In an advantageous development of the idea upon which the invention is based, the perforating bars are accommodated on the cylinder shafts, respectively, extending through the perforating cylinders. One of the perforating bars can be adjusted in a direction opposite to the direction of rotation of the perforating cylinder, in order to take into account the different cross-fold positions on the copy which are set when the cross-fold mode is changed.
One perforating tool can be accommodated in a stationary manner or stationarily on the periphery of a perforating cylinder and can cooperate with a perforating strip that is likewise mounted in a stationary manner on the opposite cylinder. A perforating tool that can be rotated in the peripheral direction relative to the perforating cylinder can be accommodated on a first perforating bar also provided on the perforating cylinder. The aforementioned perforating tool cooperates with a perforating strip mounted in a stationary manner on the opposite cylinder, for example in order to produce a cross-perforation in the second cross-fold folding mode. The perforating bar can additionally accommodate a further perforating tool, which is intended to make the perforation in the delta fold folding mode, and makes perforations on folded spines of the delta fold formed in the copy.
In the perforating cylinder that is mounted so as to be adjustable relative to the perforating nip or gap, by contrast with a perforating cylinder mounted in a stationary manner, a further perforating bar can be accommodated, and cooperates with a perforating strip which is provided on the first-mentioned stationarily mounted perforating cylinder.
The perforating strips for delta fold and second cross-fold (double parallel fold), which are accommodated as standard stationarily on the perforating cylinders, can equally well also be accommodated on further perforating bars which are mounted coaxially with respect to the shafts of the perforating cylinders. In order to reduce the drive power of the setting or adjusting drive required for the relative adjustment of the perforating bars, the latter, which surround the perforating cylinder in a shell-like manner, can be accommodated in mounting supports on the cylinder shafts.
In a construction which advantageously avoids complete spur gear trains, the perforating bars can be adjusted via transmission elements which, as coulisses or slotted guides, are accommodated on the cylinder-shaft journals provided on the drive side of the perforating cylinders. The elements that transmit the adjustment travel may be provided very advantageously and in a manner which is convenient for production on the outer sides of the coulisses or slotted guides as an external toothing or toothing system which cooperates with corresponding toothings or toothing systems on the perforating bars, in order to achieve the relative positioning of the perforating bars that accommodate the perforating tools relative to the periphery of the perforating cylinders.
Because one of the perforating cylinders is adjustable in relation to the perforating nip or gap, in order to vary the perforation depth in the material webs between the perforating bridges which are operatable via a common adjusting unit, there is accommodated a compensating mechanism, which permits joint or in-common changing of the peripheral positions of the perforating bars on the cylinders without the geometry of the perforating nip or gap being adversely affected by the position of the adjustable perforating cylinder.
The perforating device according to the invention is suitable for use both in folders with sets of pins and in those without pins, both for job printing and also for newspaper printing.
Other features which are considered as characteristic for the invention are set forth in the appended claims.
Although the invention is illustrated and described herein as embodied in a device for adjusting the phase of perforating devices as a function of the folding mode, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims.
The construction and method of operation of the invention, however, together with additional objects and advantages thereof will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings, wherein:
Referring now to the drawings and, first, particularly to
After the perforation has been performed, copies 12 are cut from the end of the material web 1 leading in the web travel direction 2, the copies 12 being possibly formed of a number of individual layers lying above one another, depending upon the number of web strands accommodated in the material web 1. The copies 12 are accepted by the folding cylinder 9, transported on the peripheral surface 11 thereof and, due to activation of a folding blade 10, which moves out of the periphery 11 of the folding cylinder 9, are thrust into the folding jaws of a folding-jaw cylinder which is not otherwise specifically illustrated but cooperates with the folding cylinder 9. Accordingly, the folded spine 15 is produced between the ends 13 and 14 of the copy 12, which produces the first cross-fold or first parallel fold. By an otherwise not specifically illustrated transfer of the folded copies 12 to a further folding cylinder 16, that transfer of copies forming no part of the invention of the instant application, the respective copes 12 are accepted on the peripheral surface 18 of the further folding cylinder 16, and the second cross-fold is then formed by moving the folding blade 17 out and folding the copy 12 which has already been cross-folded once. This produces a double cross-folded copy 22 having ends 24 and 25, the folded spine 23 being formed at the second cross-fold (double parallel fold).
In the delta-folding mode, the copy is folded twice, as compared with the double parallel folding mode, but at different points, while in the case of the double parallel fold, depending upon the set overfold, a half-fold made at the first and second cross-fold is carried out on the copy 12, which produces a copy 22.
After cross-folding has been performed, be it in delta-folding mode or in double parallel folding mode, the copies 12, 22 folded in such a manner are transported by a transport cylinder 20 to a second longitudinal folding device, which may be provided if required, or directly brought to the delivery.
In the exemplary embodiment illustrated in
Stationarily accommodated on the respective periphery 33, 34 of the two perforating cylinders 3 and 4 are the perforating tools 35.1 and the perforating strip 35.2 cooperating therewith in order to form a perforation in the region of a first cross-fold on the copy. The perforating strip 37.2 cooperating in turn with the perforating tool 37.1 for the second cross-fold, which is accommodated on the further perforating bar 28, is stationary on the fixedly mounted perforating cylinder 3.
The perforating cylinder 3 rotates in the rotary direction represented by the arrow 29 in relation to the perforating nip or gap 26, while the adjustably mounted perforating cylinder 4 rotates in the same direction as the latter relative to the perforating nip or gap 26, so that a continuous web advance through the perforating nip or gap 26 is established. As referred to the peripheral surface 34 of the perforating cylinder 4, the perforating bar 28 is adjustable in the direction of rotation represented by the arrow 30 opposite to the direction of rotation of the perforating cylinder 4 represented by the associated unidentified curved arrow.
The perforating strips 36.2, 37.2 and 38.2, which are reproduced in
In the modified embodiment according to
Both coulisses or slot guides 45 on the cylinder shafts 31 and 32 are connected to an adjusting unit 48, with which the perforating bars 27 and 28 are adjustable relative to the peripheral surfaces 33 and 34 of the perforating cylinders 3 and 4, respectively. Due to the integration of a compensating unit 49 into the sliding guide 50 between the transmission elements 45 on the cylinder shafts 31 and 32, a change in the perforating nip or gap 26 can be achieved irrespective of the adjustment of the phase angles of the perforating bars 27 and 28 on the perforating cylinders 3 and 4 relative to one another. This is augmented by having the adjustable perforating cylinder 4 connected via a hinged shaft 42 to the drive gear 41 thereof, which in turn is driven by the drive gear 40 of the perforating cylinder 3. In view of the hinged shaft 42, the adjustable cylinder 4 can be adjusted relative to the perforating nip or gap 26 without any problem. The coulisses or slotted guides 45, which are connected to one another via the sliding guide 50 and the compensating unit 49, can be positioned jointly relative to one another, because the correct setting of the perforating tools 36.1 and 38.1 relative to the perforating strips 36.2 and 38.2, respectively, depending upon the folding mode must be assured. If the adjustment of the rotational position of one perforating bar is performed, the perforating bar accommodating perforating strips corresponding thereto is automatically adjusted as well, depending upon the folding mode.
Provision is made for an adjusting unit 48 which is assigned to both coulisses or slotted guides, analogous to the embodiment according to
In the exemplary embodiment according to
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