EP1889719A1

EP1889719A1 - Mounting of numbering devices onto numbering cylinders

Info

Publication number: EP1889719A1
Application number: EP06118981A
Authority: EP
Inventors: Alain Würsch; Antoine Merminod
Original assignee: KBA Giori SA
Current assignee: KBA Notasys SA
Priority date: 2006-08-16
Filing date: 2006-08-16
Publication date: 2008-02-20
Also published as: CN101505963B; CN101505963A

Abstract

There is described a numbering system for carrying out numbering in a printing press comprising a numbering cylinder, a rotatable shaft defining a rotation axis, at least one supporting disc (1.42) mounted on the rotatable shaft for rotation therewith, the supporting disc (1.42) comprising a peripheral mounting ring (1.43) for mounting of at least one numbering device (1.06) on a periphery of the supporting disc (1.42), which numbering device (1.06) is secured to the peripheral mounting ring (1.43) by means of a clamping mechanism. The peripheral mounting ring (1.43) has a T-shaped cross-section defining a pair of annular mounting grooves (1.43a, 1.43b) on each side of the peripheral mounting ring (1.43). The numbering device (1.06) comprises clamping elements (1.50) on each side of the numbering device (1.06) which are adapted to cooperate with the annular mounting grooves (1.43a, 1.43b) for securing the numbering device (1.06) onto the peripheral mounting ring (1.43). The clamping elements (1.50) are preferably spring-loaded clamping elements.

Description

TECHNICAL FIELD

The present invention generally relates to the mounting of numbering devices onto numbering cylinders as used in particular for carrying out numbering of printed documents, especially banknotes or the like securities.

BACKGROUND OF THE INVENTION

Numbering presses for carrying out numbering of printed documents are already known in the art. Such a numbering press is for instance disclosed in German patent application No. DE 1 486 894 or European patent application No. EP 0 061 795 . Figure 1 is a drawing taken from European patent application No. EP 0 061 795 which schematically illustrates a numbering press.
As illustrated in Figure 1, such numbering press typically comprises a printing unit 1 equipped with an impression cylinder 2 and a numbering unit 3 cooperating with the impression cylinder 2. A continuous web or individual sheets to be printed is/are fed to the impression cylinder 2 using known transfer means (not illustrated in Figure 1). Once printed, the web or sheets is/are fed to a delivery unit (not illustrated in Figure 1).
The numbering unit 3 typically comprises at least one numbering cylinder 4 which is inked by a known inking system 5. In the field of numbering of banknotes, it is common to have at least two such numbering units 3 cooperating with the same impression cylinder 2 so as to print two serial numbers on each banknote.
In the field of printing of banknotes, a plurality of banknote prints are printed on successive sheets or web portions in the form of arrays having a determined number of columns and rows. These sheets or web portions are ultimately cut into individual banknotes at the end of the printing process. When carrying out numbering of such sheets or web portions, the numbering press has to be equipped with a numbering cylinder comprising as many numbering devices as there are positions to be numbered on each sheet or web portion.
Figure 2 is a partial cross-section view of a typical numbering cylinder 4 used for numbering several positions on a sheet or web portion, which partial cross-section view is taken along the axis of rotation of the numbering cylinder 4. The numbering cylinder 4 commonly comprises a shaft 41 bearing a plurality of supporting discs 42 (only one being shown in Figure 2). Each supporting disc 42 carries a plurality of numbering devices (or numbering boxes) 6 which are distributed around the periphery of the supporting disc 42 (only one numbering device 6 being shown in Figure 2). Each numbering device 6 typically comprises a housing 60 with a plurality of rotatable numbering wheels 61 disposed one next to the other around a common shaft. It will be appreciated that the numbering cylinder 4 comprises as many supporting discs 42 as there are columns of prints to be numbered on the sheets or web portions and that each supporting disc 42 comprises as many numbering devices 6 as there are rows of prints to be numbered on the sheets or web portions.
When using mechanically-actuated numbering devices, mechanical actuation means are additionally provided in order to adequately actuate the numbering wheels 61 of each numbering device 6. To this end, mechanically-actuated numbering devices 6 usually comprise a switch lever 66 for actuating the numbering wheels 61, which switch lever 66 cooperates with a switch cam disc 71 via a switch cam follower 67 (there being as many switch cam discs 71 as there are supporting discs 42). Each switch cam disc 71 is fixed with respect to the rotation of the numbering cylinder 4 and carries a cam surface (not shown) designed to initiate actuation of the numbering devices 6 between each numbering iteration. More detailed explanation about such actuation means might be found for instance in US patent No. US 3,377,948 or European patent application EP 0 718 112 .
In instances where mechanically-autonomous electronic numbering devices are used, such mechanical actuation means might not at all be necessary. This is for instance the case of the numbering device disclosed in European patent application No. 06115994.3 filed on June 23, 2006 in the name of the present Applicant and entitled "NUMBERING DEVICE FOR TYPOGRAPHIC NUMBERING".
Further numbering devices are also disclosed in US patent No. US 4,677,910 , International application No. WO 2004/016433 , German patent application No. DE 30 47 390 , US patent No. US 4,843,959 , International application No. WO 2005/018945 , as well as in European patent application No. 05405375.6 filed on June 8, 2005 in the name of the present Applicant and entitled "NUMBERING PROCESS FOR SECURITIES, METHOD FOR PROCESSING THE NUMBERED SECURITIES AND NUMBERING DEVICE TO CARRY OUT THE NUMBERING PROCESS".
As shown in Figure 2, each numbering device 6 is mounted on a peripheral mounting ring 43 provided on the periphery of the supporting disc 42. This peripheral mounting ring 43 typically exhibits a dovetailed cross-section, as shown in Figure 2. Each numbering device 6 comprises a corresponding dovetailed mounting groove 63 conforming to the shape of the peripheral mounting ring 43, as well as a clamping mechanism 65 for clamping the numbering device 6 in position onto the peripheral mounting ring 43. This clamping mechanism 65 typically includes a clamping part that is moveable with respect to the housing of the numbering device 6 and that can be displaced laterally (usually by means of screws, not illustrated in Figure 2) towards one side of the peripheral mounting ring 43 so as to shorten the gap of the mounting groove 63 and thereby secure the numbering device 6 onto the peripheral mounting ring 43.
A problem with the dovetail mounting discussed above resides in the fact that there remains a substantial risk that the numbering devices loosen from the peripheral mounting ring 43 and get detached from the supporting discs 42, thereby causing considerable damage not only to the numbering devices themselves but also to the printing press in which they are mounted.
Adjustment of the position of the numbering devices about the peripheral mounting ring is furthermore rather difficult as it implies unscrewing and screwing of the clamping part of the clamping mechanism.
In addition, the dovetail mounting requires that the mounting ring 43 and mounting groove 63 match together, i.e. exhibit a similar curvature following that of the supporting discs 42 on which the numbering devices 6 are mounted. This means that each numbering device has to be designed in correspondence with the diameter of the numbering cylinder on which they are meant to be mounted and that a numbering device designed for a given numbering cylinder diameter will not fit on a numbering cylinder having a different diameter.
There is therefore a need for an improved solution for mounting numbering devices onto numbering cylinders of printing presses.

SUMMARY OF THE INVENTION

An aim of the invention is to improve the known devices.
In particular, an aim of the present invention is to provide an improved mounting system which facilitates mounting of numbering devices onto numbering cylinders.
Another aim of the present invention is to provide such an improved mounting system which reduces risks that numbering devices loosen from their support and get detached from the numbering cylinder during operation.
Still another aim of the present invention is to provide such an improved mounting system which remains simple to implement.
These aims are achieved thanks to the device defined in the claims.
There is accordingly provided a numbering system for carrying out numbering in a printing press with a numbering cylinder comprising a rotatable shaft defining a rotation axis, at least one supporting disc mounted on the rotatable shaft for rotation therewith, the supporting disc comprising a peripheral mounting ring for mounting of at least one numbering device on a periphery of the supporting disc, which numbering device is secured to the peripheral mounting ring by means of a clamping mechanism. According to the invention, the peripheral mounting ring has a T-shaped cross-section defining a pair of annular mounting grooves on each side of the peripheral mounting ring. The numbering device, on the other hand, comprises clamping elements on each side of the numbering device, which clamping elements are adapted to cooperate with the annular mounting grooves for securing the numbering device onto the peripheral mounting ring. Preferably, the clamping elements are spring-loaded clamping elements.
According to an advantageous embodiment of the invention, the numbering device comprises a pair of mounting leg portions extending on each side of the peripheral mounting ring, the clamping elements being mounted on the mounting leg portions for cooperation with the annular mounting grooves.
According to another embodiment of the invention, the numbering device comprises a V-shaped mounting section with two planar mounting surfaces cooperating with the periphery of the peripheral mounting ring such that the V-shaped mounting section contacts the periphery of the peripheral mounting ring along two contact lines. This V-shaped mounting section on the numbering device permits mounting of the device on numbering cylinders of various diameters.
According to a preferred embodiment of the invention, each clamping element comprises a clamping leg having a foot engaging into a corresponding one of the annular mounting grooves and the clamping elements are designed in such a way that the numbering device can be released from the peripheral mounting ring by pressing the clamping elements towards the supporting disc and rotating these by 180° so that the clamping legs disengage from the corresponding annular mounting grooves. This greatly facilitates the mounting and dismounting of the numbering devices onto or from the numbering cylinder.
Still according to another preferred embodiment of the invention, the clamping elements are designed in such a way that the numbering device can be moved along the peripheral mounting ring by pressing the clamping elements towards the supporting disc in order to release the pressure exerted by the clamping elements against the annular mounting grooves. This greatly facilitates the adjustment of the position of the numbering devices along the peripheral mounting ring.
Further advantageous embodiments of the invention are the subject-matter of the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features and advantages of the present invention will appear more clearly from reading the following detailed description of embodiments of the invention which are presented solely by way of non-restrictive examples and illustrated by the attached drawings in which:

Figure 1 is a schematic side view of a prior art printing press comprising a numbering cylinder;
Figure 2 is a schematic partial cross-section view of the prior art numbering cylinder commonly used in the printing press of Figure 1 ;
Figure 3 is a partial perspective view showing the mounting of a numbering device onto the supporting disc of a numbering cylinder according to one embodiment of the invention ;
Figure 4 is a partial cross-section view of the mounting of Figure 3 taken perpendicularly to the section of the supporting disc, along the axis of rotation of the numbering cylinder;
Figure 5 is a partial cross-section view of the mounting of Figures 3 and 4 taken perpendicularly to the axis of rotation of the numbering cylinder; and
Figure 6 is a perspective view of a clamping element used in the mounting of Figures 3 to 5.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

Figure 3 is a partial perspective view showing the mounting of a numbering device, designated globally by reference 1.06, onto the supporting disc 1.42 of a numbering cylinder according to one embodiment of the invention. The remainder of the numbering cylinder is not shown in Figure 3. One will however understand that, except for the mounting system for the numbering device 1.06, the configuration of the numbering cylinder remains similar to that illustrated in Figure 2, i.e. it comprises a rotatable shaft defining a rotation axis onto which shaft the supporting disc 1.42 is mounted for rotation therewith, it being further understood that additional supporting discs are distributed along the rotation axis of the numbering cylinder in a number equal to the number of columns of prints on the sheets or web portions to be numbered.
Only part of the numbering device 1.06 is shown in Figure 3, namely the lower portion of one side frame part 1.61 of the housing 1.60 of the numbering device 1.06. In this example, the housing 1.60 of the numbering device 1.06 comprises two side frame parts 1.61, 1.62, located opposite one another and secured to each other (for instance by screws not illustrated). Side frame part 1.62 has been omitted in Figure 3 for the purpose of explanation but is shown in the cross-section view of Figure 4.
One will not describe the configuration of the numbering device 1.06 per se and of its functioning any further as it is not of particular relevance within the scope of the present invention. It suffice to understand that the numbering device 1.06 comprises, located at its upper portion, a set of rotatable numbering wheels as schematically illustrated in Figure 2. This numbering device 1.06 can either be a mechanically-actuated numbering device requiring mechanical actuation means (as discussed in reference to Figure 2) or a mechanically-autonomous electronic numbering device requiring no such mechanical actuation means, as disclosed in European patent application No. 06115994.3 filed on June 23, 2006 in the name of the present Applicant and entitled "NUMBERING DEVICE FOR TYPOGRAPHIC NUMBERING".
Still referring to Figure 3, one will appreciate that the supporting disc 1.42 comprises a peripheral mounting ring 1.43 for mounting of numbering devices. In contrast to the prior art solutions which make use of a peripheral mounting ring having a dovetailed cross-section, the peripheral mounting ring 1.43 has a T-shaped cross-section defining a pair of annular mounting grooves 1.43a, 1.43b on each side of the peripheral mounting ring. These annular mounting grooves 1.43a, 1.43b form a continuous anchoring means for mounting of the numbering devices as this will be explained hereinafter.
The underside of each numbering device 1.06 is supported on the peripheral mounting ring 1.43 and is secured thereto by means of clamping elements 1.50 adapted to cooperate with the annular mounting grooves 1.43a, 1.43b. The clamping elements 1.50 are advantageously spring-loaded clamping elements so as to facilitate mounting and adjustment operations. Preferably, as illustrated, the housing 1.60 of the numbering device 1.06 is provided with a pair of mounting leg portions 1.61 a, 1.62a (Figure 3 showing only mounting leg portion 1.61 a; the two being however visible in Figure 4) extending on each side of the peripheral mounting ring 1.43, thereby provided a stable support and guidance of the numbering device 1.06 on the peripheral mounting ring 1.43. The clamping elements 1.50 are mounted on these mounting leg portions 1.61 a, 1.62a for cooperation with the annular mounting grooves 1.43a, 1.43b.
A more detailed view of the clamping element 1.50 is provided in Figure 6. According to this preferred embodiment, the clamping element 1.50 comprises a clamping leg 1.51 having a foot 1.51 a engaging into a corresponding one of the annular mounting grooves 1.43a, 1.43b (see Figures 3 to 5) and a heel 1.54a engaging against a wall 1.63a, 1.63b of the leg portions 1.61 a, 1.62a respectively (as represented in figures 3 and 4). Still according to this preferred embodiment, each clamping element 1.50 further comprises a head part 1.52 secured (for instance through a threaded portion) to the clamping leg 1.51 at an end thereof opposite the foot 1.51a and a spring 1.53 disposed around the clamping leg 1.51. When the clamping element 1.50 is mounted on the numbering device 1.06, as illustrated in Figures 3 and 4, the spring 1.53 is compressed between the head part 1.52 and the part of the numbering device 1.06 on which the clamping element 1.50 is mounted, i.e. an upper portion of the mounting leg portions 1.61 a, 1.62a.
In the illustrated example, the head part 1.52 can be screwed or unscrewed from the clamping leg 1.51 so as to adjust the contact force (or pressure) of each clamping element. More precisely, the head part 1.52 can be fully screwed onto the clamping leg 1.51, as illustrated, so as to compress the spring 1.53 up to a highly-compressed state where this compressed spring 1.53 produces a sufficient force for securing the numbering device 1.06 firmly in place onto the peripheral mounting ring 1.43. In another state, the head part 1.52 can be slightly unscrewed from the clamping leg 1.51 so as to bring the spring 1.53 to a lightly-compressed state and thereby release the pressure exerted by the spring 1.53 with a view to facilitate mounting and adjustment of the numbering device 1.06 along the circumference supporting disc 1.42.
In a variant, the use of springs may be avoided and the head part 1.52 could be made long enough to contact the surface of leg portions 1.61a (respectively 1.62a) and apply pressure directly against this surface when being screwed hence securing the numbering device 1.06 onto the peripheral mounting ring 1.43.
In alternate embodiments of the clamping elements 1.50, one could envisage other means for adjusting the compression state of the spring 1.53. In particular, a cam mechanism with an eccentric cam could be used to switch the state of each clamping element, as before, between a highly-compressed state where the spring 1.53 is compressed up to a stage where the numbering device 1.06 is firmly secured to the peripheral mounting ring 1.43 and a lightly-compressed state where the spring 1.53 is compressed up to a stage sufficient for holding the numbering device 1.06 in place on the peripheral mounting ring 1.43 while still enabling positional adjustment of the numbering device 1.06 along the circumference of the supporting disc 1.42.
In a variant of this alternate embodiment, the use of springs may be avoided and the head part 1.52 could be made long enough to contact the surface of leg portions 1.61 a (respectively 1.62a) and apply pressure directly against this surface when being displaced by the cam mechanism hence securing the numbering device 1.06 onto the peripheral mounting ring 1.43.
In the preferred embodiment, each numbering device 1.06 comprises two clamping elements 1.50 for cooperation with each annular mounting groove 1.43a, 1.43b, i.e. a total of four clamping elements 1.50, two clamping elements 1.50 per side frame part 1.61, 1.62 as illustrated in Figure 5. This Figure only shows the arrangement of two clamping elements 1.50 on side frame part 1.61 for cooperation with annular mounting groove 1.43a, it being understood that the arrangement of the other two clamping elements 1.50 on side frame part 1.62 is identical.
In the preferred embodiment making use of spring-loaded clamping elements, the numbering device 1.06 can be released from the peripheral mounting ring 1.43 by pressing the clamping elements 1.50 towards the supporting disc 1.42 and rotating these by 180° once the heel 1.54a is not engaged anymore against the walls 1.63a and 1.63b so that the feet 1.51 a may disengage from the corresponding annular mounting grooves 1.43a, 1.43b. More precisely, by pressing a clamping element 1.50 towards the supporting disc 1.42, the spring 1.53 is compressed and the clamping leg 1.51 is lowered with respect to the corresponding mounting leg portion 1.61 a or 1.62a thus disengaging the heel 1.54a from the walls 1.63a and 1.63b. Then, by rotating the clamping element 1.50 by 180° once the disengagement of the heel 1.54a is realized, the foot 1.51a of the clamping leg 1.51 is allowed to pass below the corresponding mounting leg portion 1.61 a or 1.62a and disengage from the annular mounting groove 1.43a or 1.43b. Mounting of a numbering device 1.06 onto the peripheral mounting ring 1.43 is performed in a reversed manner.
In the above example, one will appreciate that each clamping element 1.50 is not allowed to rotate from its mounting position (illustrated in Figures 3 to 5), unless such clamping element 1.50 is pressed towards the periphery of the supporting disc 1.42. In other words, in the mounting position, each wall 1.63a and 1.63b of the mounting leg portion 1.61 a, 1.62a prevents the clamping leg 1.51 of the clamping element 1.50 from rotating by engagement with the heel 1.54a, thereby ensuring that the numbering device 1.06 sits firmly in place.
In addition, in the preferred embodiment making use of spring-loaded clamping elements, one will appreciate that the numbering device 1.06 can be moved along the peripheral mounting ring 1.43 by pressing the clamping elements 1.50 towards the supporting disc 1.42 in order to release the pressure exerted by the clamping elements 1.50 against the annular mounting grooves 1.43a, 1.43b.
One will understand that the spring-loaded clamping elements 1.50 have to be designed in such a way as to ensure a stable mounting of the numbering device 1.06 and prevent disengagement of the numbering device 1.06 from the peripheral mounting ring 1.43 during operation. To this end, in addition to the mechanism explained hereinabove, the force of the spring elements 1.53 is selected so that the combined force exerted by the clamping elements 1.50 is sufficient to counteract the centrifugal and tangential forces exerted on the numbering device 1.06 during operation. In a preferred variant, each clamping element 1.50 is designed so as to produce, in its highly-compressed state, a force of the order of 120 N, thereby yielding a total force of 480 N holding each numbering device 1.06 against the peripheral mounting ring 1.43. As already mentioned, by providing an adjustable head part 1.52 on each clamping element 1.50, the pressure exerted by the spring element 1.53 can be reduced so as to ease mounting and adjustment operations.
According to another advantageous aspect of the preferred embodiment, one can see in Figures 3 and 5 that the numbering device 1.06 comprises a V-shaped mounting section 1.61 b, 1.62b with two planar mounting surfaces cooperating with the periphery of the peripheral mounting ring 1.43. This means that the V-shaped mounting section 1.61 b, 1.62b contacts the periphery of the peripheral mounting ring 1.43 along two contact lines. This particular configuration is advantageous in that the numbering device 1.06 can be mounted on supporting discs 1.42 of varying diameters, this being not possible with the prior art solutions using dovetail mountings.
The system according to the present invention can be used in printing machines for documents such as banknotes, securities and other similar printed documents. The system can be mounted in a machine as a step of the entire printing process carried out by said machine, or the system can be used in a stand-alone machine which is only used to number documents. Accordingly, in the present specification, the notion of printing press is intended for a large printing machine which carry several steps of printing or for a stand-alone machine.
It will be understood that various modifications and/or improvements obvious to the person skilled in the art can be made to the embodiments described hereinabove without departing from the scope of the invention defined by the annexed claims.
For instance, while the preferred embodiment of the invention makes use of spring-loaded clamping elements, clamping elements without any spring could be used. In that context, one could envisage clamping elements consisting mainly of a cam mechanism with an eccentric cam and releasable clamping members cooperating directly with a base portion of the housing of the numbering device and the annular mounting grooves. The use of spring-loaded clamping elements is however preferred.
In addition, while helical spring elements are illustrated in the drawings, other equivalent types of spring elements could be used, such as leaf springs or elastomeric springs.

Claims

A numbering system for carrying out numbering in a printing press with a numbering cylinder comprising a rotatable shaft defining a rotation axis, at least one supporting disc (1.42) mounted on said rotatable shaft for rotation therewith, said supporting disc (1.42) comprising a peripheral mounting ring (1.43) for mounting of at least one numbering device (1.06) on a periphery of the supporting disc (1.42), which numbering device (1.06) is secured to said peripheral mounting ring (1.43) by means of a clamping mechanism,
characterized in that said peripheral mounting ring (1.43) has a T-shaped cross-section defining a pair of annular mounting grooves (1.43a, 1.43b) on each side of said peripheral mounting ring (1.43) and in that said numbering device (1.06) comprises clamping elements (1.50) on each side of said numbering device (1.06) which are adapted to cooperate with said annular mounting grooves (1.43a, 1.43b) for securing the numbering device (1.06) onto said peripheral mounting ring.
The numbering system of claim 1, wherein said clamping elements are spring-loaded clamping elements (1.50).
The numbering system of claim 1 or 2, wherein said numbering device (1.06) comprises a pair of mounting leg portions (1.61a, 1.62a) extending on each side of said peripheral mounting ring (1.43), said clamping elements (1.50) being mounted on said mounting leg portions (1.61a, 1.62a) for cooperation with said annular mounting grooves (1.43a, 1.43b).
The numbering system according to any one of claims 1 to 3, wherein said numbering device (1.06) comprises a V-shaped mounting section (1.61 b; 1.62b) with two planar mounting surfaces cooperating with the periphery of said peripheral mounting ring (1.43) such that said V-shaped mounting section (1.61 b; 1.62b) contacts the periphery of the peripheral mounting ring (1.43) along two contact lines.
The numbering system according to any one of the preceding claims, wherein each clamping element (1.50) comprises a clamping leg (1.51) having a foot (1.51a) engaging into a corresponding one of the annular mounting grooves (1.43a, 1.43b).
The numbering system according to claim 3, wherein each clamping element (1.50) comprises a clamping leg (1.51) having a foot (1.51a) engaging into a corresponding one of the annular mounting grooves (1.43a, 1.43b) and a heel (1.54a) engaging against a wall (1.63a, 1.63b) of said mounting leg portions (1.61a, 1.62a).
The numbering system according to claim 5 or 6, wherein said clamping elements are spring-loaded clamping elements (1.50) and wherein each clamping element (1.50) further comprises a head part (1.52) secured to said clamping leg (1.51) at an end thereof opposite said foot (1.51a) and a spring (1.53) disposed around said clamping leg (1.51), which spring (1.53) is compressed between said head part (1.52) and a part (1.61a; 1.62a) of the numbering device (1.06) on which the clamping element (1.50) is mounted.
The numbering system according to claim 6, wherein said clamping elements are spring-loaded clamping elements (1.50) and wherein said clamping elements (1.50) are designed in such a way that the numbering device (1.06) can be released from the peripheral mounting ring (1.43) by pressing the clamping elements (1.50) towards the supporting disc (1.42) for disengaging the heel (1.54a) from the wall (1.63a, 1.63b) of said mounting leg portions (1.61a, 1.62a) and rotating these elements by 180° so that the clamping legs (1.51) disengage from the corresponding annular mounting grooves (1.43a, 1.43b).
The numbering system according to any one of the preceding claims, wherein said clamping elements are spring-loaded clamping elements (1.50) and wherein said clamping elements (1.50) are designed in such a way that the numbering device (1.06) can be moved along said peripheral mounting ring (1.43) by pressing the clamping elements (1.50) towards the supporting disc (1.42) in order to release the pressure exerted by said clamping elements (1.50) against the annular mounting grooves (1.43a, 1.43b).
The numbering system according to claim 2, 7, 8 or 9, wherein said spring-loaded clamping elements (1.50) can be switched between a highly-compressed state where the numbering device (1.06) is firmly secured to the peripheral mounting ring (1.43) and a lightly-compressed state where numbering device (1.06) is held in place on the peripheral mounting ring (1.43) while still enabling positional adjustment of the numbering device (1.06) along the circumference of the supporting disc (1.42).
The numbering system according to any one of the preceding claims, wherein each numbering device (1.06) comprises two clamping elements (1.50) for cooperation with each annular mounting groove (1.43a, 1.43b).
A printing press comprising at least one numbering system according to any one of the preceding claims.
A numbering device for the numbering system according to any one of claims 1 to 11, said numbering device (1.06) comprising clamping elements (1.50) on each side of the numbering device (1.06) which are adapted to cooperate with the annular mounting grooves (1.43a, 1.43b) of the T-shaped peripheral mounting ring (1.43) for securing the numbering device (1.06) onto the numbering cylinder.
The numbering device of claim 13, wherein said clamping elements are spring-loaded clamping elements (1.50).