EP1002729A1

EP1002729A1 - Method and device for cutting tie bands of stacks or packs of labels and/or blanks, as well as a cutting unit of the bands binding the stacks of blanks in the cigarette packing machines

Info

Publication number: EP1002729A1
Application number: EP99120338A
Authority: EP
Inventors: Valter Spada
Original assignee: Sasib Tobacco SpA
Current assignee: SASIB SpA
Priority date: 1998-11-19
Filing date: 1999-10-12
Publication date: 2000-05-24
Also published as: ITSV980066A0; ITSV980066A1; IT1305424B1

Abstract

Method of cutting the tie bands of bundles or stacks of labels in which the band (F) is cut according to a transversal cutting line (11,111) and in which before the cut of the band (F) is carried out the same is moved away from the stack (P) in the area where the cut takes place, characterized by the fact that the moving away of the band (F) in the cutting area of the same is obtained by lifting the band from the bundle or stack (P) of blanks in direction of the cutting knife (11,111). <IMAGE>

Description

The invention relates to a method of cutting bands tying the bundles or stacks of labels in which the band is cut according to a transversal cutting line in which before the cut of the band is carried out the same is moved away from the stack in the area where the cut takes place.

To obtain the moving away of the band from the stack of blanks is known from the patent application of the same titular filed under no. ITSV98000021, at least in the section of the cutting line thanks to a lateral deflection of a part of the labels or blanks, rearwards with regards to the part of the band intended to engage with the cutting knife, in order to form a throat for the passage (G) of the cutting knife (11) avoiding certain interference between the same and the labels or blanks in the area of the cutting line (T).

The bound stacks are generally supported by conveyor means that pick-up the same from a supply line and take them to the cutting station. Whereas the means for deflecting part of the blanks of the stack rearward are associated with the cutting station that is substantially stationary, the means for realigning the stack must be provided for on the conveyor itself, and must be such that they can be activated or de-activated to allow for the space for deflecting part of the blanks of the stack. Furthermore, the cutting station must have means for the deflection of part of the blanks of the stack, as well as means to check the deflection during the realignment cycle of the stack after the cutting of the stack has taken place and these means must operate alternating each other, substantially in the same section and in a synchronized manner with the means of re-alignment on the conveyor.

The invention aims at realizing a method of cutting the tie bands of the type described at the beginning that allows for a positive fast cut, and without the danger of ruining the labels or the blanks of the stack tied by the same band, the whole allowing for the realization of the method with relative simple means, of little space and low cost.

The invention attains the above mentioned purposes, in that the moving away of the band in the cutting station of the same is obtained by means of a lifting of the band from the stack in direction of the cutting knife.

Such a method can provide for different alternatives.

A first alternative provides that the lifting takes place thanks to a traction of the band in direction of moving away from the corresponding side of the stack.

The traction can be applied on one part of the band provided an a side of the preestablished position of the cutting line, or on parts of the band located on both the sides of the preset position of the cutting line.

Such a traction can be exerted by suction.

A second alternative provides that the lifting from the corresponding side of the stack takes place thanks to the exertion of a warping pressure on the side of the part of the band to be subjected to the cut that is turned towards the stack and the said warping takes place in direction of the cutting knife.

With reference to this second alternative it is possible to provide for different variants.

A first variant can consist in the execution of the deflection of part of the blanks in the stack foreseen at a level slightly above or below the cutting line, in direction of the cutting knife, whereas the cut is carried out along a cutting line at a level directly above or below of the deflected part of the stack, in correspondence to which the band is lifted from the stack.

A perfecting of the above modality consists in the fact of deflecting part of the blanks of the stack on the two sides of the preestablished position of the cutting line, forming a throat between the lines of deflection in which the corresponding part of the band is tensioned on one throat.

Alternatively to the above solutions of the mechanical type, it is possible to provide also for other means, as for example the generation of an air jet that lifts the band in the section astride of the cutting line.

Advantageously in some or in all the solutions previously described the steps of locking or freeing the stack can be carried out, by means of clamping and releasing to maintain a preestablished position and a preestablished alignment of the same, and to allow for the deflection and realignment of the stack itself.

Advantageously the method provides for the steps of realignment of the stack or pack after the execution of the cutting of the band.

According to an additional feature, the realignment is not carried out only in the sense of re-establishing and compensate the initial deflection of part of the labels or blanks for carrying out the cutting of the band, but also according to directions transversal to this one, for example in a direction parallel to the cutting line.

Such realignment is indispensable for inserting the stack into the hopper of containment and feeding of the blanks to the manufacturing machine.

Thanks to this method one guarantees a fast execution of the cut, with simple cutting means and without running the risk of damaging the labels or the blanks of the stack provided in the immediate vicinity of the cutting line by the cutting knife.

The invention relates to a device for the realization of the said method that comprises:

a) a cutting in station in which a cutting knife is provided;

b) means for feeding to the cutting station of at least one bundle or stack of labels or blanks held together by at least one tie band;

c) means to grip the band provided for at least on one side of the cutting line and taking it from the cutting station itself;

d) means for the relative deflection between the stack with the band and the cutting knife with the gripper means, alternatively in direction of reciprocal approaching or of moving away to bring the gripper means in position of gripping the band and in position of moving the same away from the stack.

e) clamping means of the stack to hold the same in condition of alignment during the moving away of the band.

The clamping means are formed advantageously by suction nozzles acting on the band, along the cutting line and at least in one section deflected laterally and at a certain distance from the said cutting line.

Preferably the suction nozzles are provided for in two separate sections each one arranged on one of the two sides of the cutting line at a certain distance from the same.

Alternatively, when the lifting of the band is obtained by means of deflection.

The invention relates to device for the realization of said method that comprises:

a) a cutting station in which a cutting knife is provided;

b) means feeding to the cutting station of at least one bundle or stack of labels or blanks held together by at least one tie band;

c) pusher means that can be activated and deactivated and act in the sense of a partial deflection over a preestablished distance of one part of the label or labels or blanks in the section of the cutting line and that can be alternatively to the cutting knife and that act on the side of the stack opposite to the side in correspondence of which the cutting of the band takes place, the reciprocal position between the pusher means and the cutting line of the knife being deflected transversally to each other;

d) means for realignment of the stack or pack in the initial condition after the execution of the cut and that are formed by mobile pushers of realignment acting in the opposite direction to the one of the deflecting pushers.

Advantageously, the pusher means of realignment of the bundle or stack are provided in combination with surfaces for checking the realignment on the opposite side, or on the side of the bundle or stack on which act the means of deflections.

The means of deflection and the means of realignment and/or checking the deflection and the pusher means of realignment are such whereby they act alternating between each other.

Apart from the means of realignment of the blanks or of the labels in a position superimposed to each other in a direction transversal to the cutting the device has advantageously also means of realignment in one or more directions substantially parallel or in any case with a considerable component parallel to the cutting according to the geometric shape of the plan of the label or the blank. In particular with rectangular, or square, labels or blanks, or that however have edges perpendicular to the cutting line at the two opposite extremities, the invention provides for means of alignment also in direction of the cutting line itself.

The device besides has in combination with the means explained above also means for clamping of the bundle or stack of labels or blanks in the perfectly realigned condition and that are activated after the realignment cycle and remain activated during the cycle of discharging or of exit from the cutting station.

According to a preferred form of execution, the means of deflection of the labels or the blanks in order to lift the band from the stack in the area of the cutting line, the means of checking the realignment of the labels or blanks relative to the part of the same subjected to deflection and the means of clamping of the stack in the condition of deflection during the cutting and realignment of the stack as well as the drive actuators of said means are integrated in the means feeding the bundle or stack to the cutting station.

A preferred example of execution, provides that the said feeding means be put together in their most complex form, but not necessarily limiting as it is possible to also provide for sub-combinations, by a conveyor bracket supported movable along a guide on a path at least two dimensional, preferably three dimensional and the said bracket has a ledge of support of the bundle or of the stack, preferably designed to support the said bundle or stack in the mid section, a set of clamping pushers opposite to the ledge of support and that can be activated to move in two directions of approach and moving away from said ledge, a support plate of the side of the stack or of the bundle opposite to the one along which the band is cut and at least one oscillating pusher, preferably a pair of oscillating pushers, respectively on the two sides of the support plate of the stack or bundle on the side opposite to the cutting section of the band, the said pushers have a flat surface with at least one deflecting projection or with two deflecting projections in a preestablished position and such, whereby the pusher extends itself in active position perfectly level with the said support plate with the projection or projections protruding beyond the same and in such a position to extend itself along one or the other or on both sides of the cutting line and at a certain distance from the same, whereas in the inactive position, the said pushers are away from the stack of blanks.

The cutting unit that carries the cutting knife, the means of clamping and/or the means of realignment are fitted movable transversally to the cutting line in the two directions and in a measure substantially corresponding to the desired lifting of the band from the stack or bundle of blanks.

The invention has further features that are subject of the claims below.

The features of the invention and the advantages derived therefrom become better known from the following description of an executive example illustrated as a non limiting title in the enclosed drawings, in which:

The Figs. 1 and 2 illustrate in perspective a cutting station of the tie band F of the stacks or bundles s of blanks, in particular of blanks for making rigid packets for cigarettes, or similar.

The Figs. 3 and 4 illustrate respectively one of three different lifting methods of the band from the stack of blanks.

The Fig. 6 illustrates a view in transversal crosssection of the means for carrying out the lifting of the band and of cutting the same according to the modality of the Fig. 3, that is by means of gripping the band by suction.

The Fig. 7 illustrates the situation of the Fig,. 6 with a plan view partially in cross-section.

The Figs. 8 and 9 illustrate the means for lifting of the band from the side of the pack in correspondence to the cutting line, by means of a deflection pressure wise of a part of the blanks in direction of the knife and only on one side of the cutting line.

The Figs. 10 and 11 are two views analogous to the Figs. 8 and 9 and illustrate the means of lifting of the band by means of a deflection in direction of pressure of the band towards the cutting knife, by means of deflecting part of the blanks of the stack on the two sides of the cutting line.

The Figs. 12 and 13 illustrate two cross-sections of the cutting unit according to a plane parallel to the cutting line and in different cycles of the procedure of cutting the band.

The Fig. 14 illustrates a view analogous to the Figs. 12 and 13 after the cutting of the band has taken place and in the activated condition of the means of realignment of the stack.

The Fig. 15 illustrates a view analogous to the Fig. 6 with the cutting unit after execution of the cut and with the means of realignment of the stack in activated condition.

With reference to the Figures, for example in a cigarette packing machine, or similar means are provided for feeding, for example a pair of conveyor bands 1 parallel and distanced from each other of a succession of stacks P of blanks, each of these stacks is tied by a band F.

The stacks of blanks P are picked up one at the time from the exit end of the conveyor by pick-up/feeder means 2 that are movable along

guides

3, 7, for example a bridge type structure according to two directions in a vertical plane and that take each stack P one at a time to the cutting station S placed laterally offset relative to the conveyor 1. After the cutting of the band the pick-up feeder 2 carries the stack P to a feeding station on the manufacturing machine, in this case a packing machine depositing it in a hopper (not illustrated in detail), but that for example can be arranged immediately at the side of the cutting station.

In the cutting station, a cutting unit is provided for overall indicated with 4 and that is housed in a box 104 movable forward and backward in position of moving away from and approaching the stack P waiting on the pick-up/feeder means 2 that form also the means of support of the stack during the cutting process itself.

The box 104 of the cutting unit 4 is fitted on horizontal guides 5 and is moved along the same by an actuator 6 that can be of any type, for example pneumatic or hydrodynamic or oleodynamic.

The pick-up/feeder 2 means are formed by a bracket suspended projecting on a carriage movable in particular in a direction parallel to the cutting line and horizontal, the guide 3 of that carriage is in turn fitted sliding vertically on vertical guides 7, in particular at its opposite ends.

The bracket of the pick-up/feeder means of the stacks P comprises a horizontal lower support plane 102 to which is connected a vertical plate 202. The vertical plate 202 is designed to form a stop surface of the stack P opposite to the side of the stack P along which is provided the cutting line of the band F, becoming, for simplicity, in the text and in the claims the side of the stack P opposite to the cutting defined as rear and the one in correspondence of which is provided the cutting line defined as front. The lower plane of support 102 and the rear stop plate 202 form a L shaped bracket and are rigidly connected to each other. The free extremity of the rear stop plate 202 is hinged in an oscillating manner around an axis 8 parallel to the cutting line at the lower extremity of the structure of the pick-up/feeder 2. An actuator articulated with one end to a rear projection 302 of the top end of articulation of the rear stop wall 202 and with the other end to the bottom end, provided in the section of the support plane 102, of a bracket 402 drives the oscillatory motion of the support plane 102 and rear wall 202 assembly.

In a position overlapping the support plane 102, the pick-up/feeder means 2 have a ledge 20 of support of one or more, pushers 21 that act perpendicular to the top side of the stack P, for locking the same in position. The pushers 21 drivable by linear , pneumatic, hydraulic actuators or of other type can be lifted from a position distanced from the rear side of the stack P and can be lowered against the stack P on which they can exert a preset clamping pressure of the stack between them and the support plane 102.

The cutting unit 4 comprises a box 104 inside which is provided a first carriage unit, slide guide and drive actuator 10 that carries the knife 11. The carriage-slide guide-actuator unit 10 is of the integrated type and easily available on he market. The carriage 110 of the same has the rotary drive motor 11 of a rotary knife 211 and a fork 311 equipped with a central slot for passage of the knife blade 211 and that has a certain inclination in the horizontal plane with regards to the cutting and is designed to overlap on the rear of the band F during the cutting itself forming a surface of support in the section of the band along which the cut is applied. Advantageously the fork extends itself according to a plane secant relative to the knife 211 the peripheral section of which passes through the central slot of the same. Furthermore the fork is made cuneiform, forming a surface of slight tensioning and progressive transfer with the advancement of the knife 211 in a section at an angle between cutting and wall of the fork 311 itself.

The knife 11 is moveable from a position of rest in which it is completely covered towards the outside in an active position, in which it projects outward towards the stack P that is facing towards a slot 204 of the box 104 that extends itself in a front stop plate 304 of the said box 4 for the entire length of the active stroke of the knife. In the section of the slot 204 for passage of the knife 11 on one of the two edges of the slot 204 or on both is provided a nozzle for removal 30, preferably a plurality of suction nozzles 30, in particular a row of suction nozzles that extend themselves in the section of contact of the band F with the stop surface 304. With reference also to the Fig. 3, the pick-up/feeder 2, after having picked up the stack P from the bands 1 transfers it to the cutting station, taking it in a position resting against the stop surface 204 of the box 104 and in a position such, whereby the band comes to coincide with the suction nozzles 30. These are connected to a suction source thanks to conduits 31 and are activated at the moment of contact with the band F. Subsequently the box 4 is moved backwards in a preestablished measure along the guide 5, whereas the band F remains firmly retained by the suction nozzles 30, whereby thanks to the dimensional tolerances and its intrinsic elasticity, the same lifts itself off the side of the stack P facing towards the knife 11.

During the lifting of the band F from the stack P, the same is retained against the pull off by the feeder/pick-up 2 by means of clamping between the side of support 102 and the pusher means 21. Upon completion of the cut, the suction nozzles can be deactivated, whereas the box 4 can be returned in the stop position with the stack P to carry out the eventual cycles of realignment of the stack, when the same also carries such means of realignment.

With reference to the Fig. 4 and to the Fig. 5, the lifting of the band F is obtained by deflection of part of the blanks from the rear side of the stack P, that is the one opposite to the cutting knife 11 in direction of the side facing towards the cutting knife 11, that is the front side of the stack P. This deflection results in the formation of a projection P' on the front side of the stack that determines the lifting of the band F on both sides of the projection P'. In the example of Fig. 4 the part of the blanks that is deflected is the one designed to form a projection P' on only one side of the cutting line, in particular below the cutting line. The deflection and the distance of the same from the cutting knife 11 are chosen in such a manner whereby the cutting line finds itself in an optimal section of the lifting of the band F.

In the variant of which in Fig. 5, two sections P' and P'' of deflection of part of the blanks of the stack P are provided for. The projections P' and P'' are each arranged on one of the two sides of the cutting line, that is above and below the same. In this manner a throat is formed in the area of the cutting line, whereby the band F results to be lifted from the blanks underneath and in the throat itself and has sufficient space for the unimpeded passage of the knife 11 and the fork 211 without said means coming into contact with the blanks.

The means for actuating of the above methodologies of cutting constitute the differences of the means illustrated with reference to the Figs. 1, 2, 3, 6, and 7. Therefore in the following description reference will be made to what already previously described, and limited to the description of the additional variances or modifications.

With reference to the feeding and conveyors means of the stack P indicated with 2, as evidenced by the Figs. 8 and 9, adjacent to the two vertical sides of the rear stop plate 202 are provided two deflecting pushers 602 that are supported by the rear stop plate 202 itself in a manner oscillating around an axis parallel to the one of oscillation of the rear stop plate 202. The two deflecting pushers 602 in form of an upside-down L, with a branch parallel to the rear stop plate 202 and a transversal branch and are fulcrated in the corner section in such a manner as to assume thanks to the linear actuators 802 a position of alignment with the face of the rear stop plate 202 against which the stack P comes into contact and a position moved angularly backwards in a dimension equal to the maximum depth of a projection of the deflection 502. This is provided for at such a level, whereby, in the active position of deflection (Fig. 9), in which the remaining part of the pushers extends itself level with the rear stop plate 202, the projection of the deflection is at a level laterally offset relative to the cutting line forming the above mentioned projection P' to lift the band F on the face of the stack turned towards the knife 11.

The Figs. 10 and 11 illustrate the variant relative to the means necessary for carrying out the deflection in two different sections on the two sides of the cutting line as illustrated in Fig. 5.

In this case the deflecting pushers 602, are made in a manner substantially identical to those according to the Figs. 8 and 9, with the difference that they have two projections of deflection 502, 502' arranged in such a position to obtain the projections P' and P'' one above and the other below the cutting line.

The width or the horizontal extension of the rear stop plate 202 is at least equal, if not greater than the one of the band F and the deflecting pushers 602 extend themselves substantially laterally adjacent relative to the corresponding lateral edge of the band F.

The Figs. 12 to 14 illustrate different cutting cycles, whereas at termination of the cut, after the knife returned to its starting position, the process of realignment of the pack P takes place.

Additional pushers 12 of realignment of the deflected part or parts P' and P'' of the blanks of the stack P are provided for this purpose in the box 104 of the cutting unit 4 . preferably two or more pushers of realignment 12 are provided for that are distanced from each other parallel to the direction of cutting. The distance of the pushers of realignment 12 is such whereby in the presence of the stack P of blanks of different size, at least one of the pusher of realignment 12 will cooperate with the stack P.

The pushers of realignment 12 are fitted moveable in an active and inactive position. In the active position these extend themselves respectively beyond the level with the front stop plate 204 of the box 104, whereas in the inactive position they are withdrawn into the box in a position of non interference with the knife 11.

This is carried out thanks to the actuators 14.

It is possible to have the pushers of realignment carry out different types of motions. In one variance, for example the pusher of realignment are fitted on the same of the linear actuators 14 and are permanently fitted in a position coinciding with the slot 304. The stroke of the actuators is such, whereby in the inactive position completely withdrawn within the box 104, the pushers of realignment 12 will be outside of the path of movement of the knife 11 and do not interfere with the same.

In an alternate form of execution, in order to reduce the stroke of the linear actuators in the direction perpendicular to the facing side of the stack P, the actuators 14 are fitted on a bracket mounted on vertical guides and projecting cantilevered in the section of passage of the knife 11, the said bracket is alternately lifted and lowered in a position in which the pushers of realignment 12 are coinciding with the slot 204 and in a position in which said parts 12 are lifted relative to the slot 202 in the distanced position of non interference with the stroke of the knife 11. The lifting and lowering of the bracket takes place thanks to linear actuators that can be the same as those used for the parts 12 or for the movement of the knife 11.

The box 14 can carry additional parts of realignment of the stack P according to the direction parallel to the cutting line, for example means of realignment carried cantilevered from above in front of the front stop plate 304 of the box 4. These parts of realignment can be formed by vertical elements that extend themselves over the entire height of the stack P and the top end of which is fixed to the projecting extremity of a support arm 116 that connects to or is formed by a lateral extension of an respective sliding carriage 216 moveable on two guides 17 parallel to each other and relative to the cutting line. Between the two guides 17 in the midsection between the two small carriages 216 are provided two linear actuators 18 that drive the movement of the two vertical elements (not illustrated), in such a manner that the same are moved away or closer to one an other symmetrically with regards to the median transversal axes of the stack P. The two vertical elements, have stop plates with the end sides of the stack P perpendicular to the cutting line and parallel to each other that are oriented corresponding to the area of contact with the said sides of the stack P.

The stroke of the parts of realignment 16 in the cutting direction is such, that they can be distanced in a measure greater than the maximum dimension of the blanks in the direction of the cutting line and can be can be taken to stop against the corresponding sides ends of the stack P with a minimal dimension in direction of the cutting line T.

The working of the device according to the two additional modalities of lifting of the band F from the stack ( is not dissimilar to the one previously illustrated. In this case, it is possible that the stack p is taken to initially stop against the stop surface 304 of the box 4 then the same being moved rearwards by a dimension corresponding to the shoulder P' , P'' of the blanks.

The activation of the knife causes the cutting and at the return of the same, the pushers of realignment 12 are made to advance only or at least first or together or subsequently the entire box 4 until coming to a stop against the facing side of the stack P.

The clamping means of the stack P, 21 will obviously be activated alternatively according to the execution of the deflection, of the cut or of the realignment.

An executive variant not illustrated advantageously provides that the stop plate 304 of the box 4 against that stack P has stop section projecting outwards in a measure substantially corresponding to the dimensions of the deflections P, P' in order to guarantee that the stack is not moved when the clamping force must be reduced in order to carry out the deflection. In this case, in the area of the projection of the deflection P', and P'', the surface 304 has a kind of a recessed niche that has dimensions such to accept at least the area of deflection P' and P''.

It is also obviously possible that laterally with regards to the path of the knife the stop surface 304 to have a shape corresponding to the one of the facing side of the stack P in condition of deflection of the blanks, in order to guarantee a complete rest of the stack against the plate 304.

In this case, for example two bands lateral to the area of passage of the knife will have two throats complementary to the projections of deflection P' and P'' of the stack P.

From the above explanation the simplicity of the means and of the parts used to carry out the method of cutting becomes clear. Such simplicity guarantees low manufacturing costs and positive operation as well as noticeable speed of execution of the processes.

The simple process of cutting the band has been advantageously integrated with functions of realignment and adjustment of the stack that make the subsequent steps of feeding the stack to the manufacturing machine more secure and less subject to jams.

The cut is carried out without danger of damaging the blanks and therefore reducing the quantity of rejects, whereas the realignment avoids having blanks in a wrong position that can lead to jams or stops in the feeding cycle in which generally the blanks are separated one after the other from the stack itself.

Naturally the invention is not limited to the executive forms herein described and illustrated but can be amply varied above all constructively without for this abandoning the informative principle described above and claimed below.

Claims

Method of cutting tie bands of bundles or stacks of labels in which the band (F) is sheared according to a transversal cutting line (11, 111) and in which prior to the execution of the cutting of the band (F) the moving away of the same from stack (P) is carried out in the area of execution of the cut, characterized by the fact that the distancing of the band (F) in the cutting area of the same is obtained by means of lifting the band from the bundle or stack (P) of blanks in direction of the cutting knife (11, 111).
Method according to the claim 1, characterized by the fact that the lifting of the band (F) takes place thanks to the traction (30, 31) of the band (F) in the direction of distancing from the corresponding side of the bundle or stack (P).
Method according to the claim 2, characterized by the fact that the traction is applied to one side of the band (F) provided on one side of the of preestablished position of the cutting line (11, 111), or on parts of the band (F) arranged on both sides of the preestablished position of the cutting line (11, 111).
Method according to one or more of the preceding claims, characterized by the fact that the traction can be applied by means of suction (30, 31).
Method according to the claim 1, characterized by the fact that the lifting from the corresponding side of the stack (P) takes place thanks to the exercising of a pressure of defonation (502, 502' 602) on the side of the part of the band (F) to be subjected to the cutting that is turned towards the stack (P), or opposite to the cutting knife (11, 111) and the said deformation (P' P'') takes placed in direction of the cutting knife.
Method according to the claim 5, characterized by the fact that the deflection is carried out of part of the blanks (P' P'') of the stack (P) provided at a level slightly above or below of the cutting line (11, 111), in direction of the cutting knife (11, 111), whereas the cut is carried out along a cutting line at a level directly above or below the deflected part of the stack (P) in correspondence of the which the band (F) is lifted from the stack (P) itself.
Method according to the claim 6, characterized by the fact that a part of the blanks (P', P'') of the stack (P) is deflected on both sides of the preestablished position of the cutting line (11, 111), forming between the two areas of deflection a throat, as the corresponding part of the band (F) is tensioned over a throat.
Method according to the claim 1, characterized by the fact that the band (F) is lifted from the stack (P), in the area astride of the cutting line (11, 111) by means of an air jet under pressure blown between the band (F) and the stack on the side of the same turned towards the knife (11, 111).
Method according to one or more of the preceding claims, characterized by the fact that the bundle or stack (P) is alternately clamped and released during the different cycles of lifting the band (F) or of deflection (P' P'') and during the cut, be means of clamping or releasing or engagement with stop plates and positioning to maintain a preestablished position and a preestablished alignment of the same, and to allow for the deflection and realignment of the stack itself.
Method according to one or more of the preceding claims, characterized by the fact that it provides the steps of realignment of the bundle or the stack (P) after the cutting of the band (F) has been executed.
Method according to the claim 9, characterized by the fact that a realignment is carried out according to at least two directions transversal to each other, that is perpendicular to pairs of opposite sides or of sides substantially opposite of the bundle or the stack (P).
Device for actuating the method according to one or more of the claims 1 and 4, characterized by the fact that the said device comprises:

a) a cutting station (S) in which a cutting knife (11, 111) is provided;

b) means feeding (2) to the cutting station (S) at least one bundle or stack (P) of labels or blanks held together by at least one tie band (F);

c) means to clamp (30, 31) the band (F) provided for on at least one side of the cutting line (11, 111) and taken from the cutting station itself (S, 4, 304);

d) Means (5, 6) for the relative movement between the stack (P) with the band (F) and the cutting knife (11, 111) with clamping means (30, 31), alternatively in direction of reciprocal approach and of moving away to bring the clamping means (30, 31) in clamping position of the band (F) and in the position of distancing the same from the stack (P).

e) clamping means (2, 102, 21) of the stack (P) to keep the same in condition of alignment during the moving away of the band (F);
Device according to the claim 12, characterized by the fact that the clamping means (30, 31) are advantageously formed by suction nozzles acting on the band (F), along the cutting line (11, 111) and at least in an area laterally offset and at a certain distance from the said cutting line (11, 111).
Device according to the claim 13, characterized by the fact that the suction nozzles (30, 31) are provided in two separate areas each arranged on one of the two sides of the cutting line (11, 111) at a certain distance from the same.
Device for actuating of the method according to one or more of the preceding claims 1, 5 to 11, characterized by the fact that the said device comprises:

a) a cutting station (S) in which a cutting knife (11, 111) is proved;

b) means feeding (2) to the cutting station (S) at least one bundle or stack (P) of labels or blanks (2) held together by at least one tie band (F);

c) pusher means (2, 62, 502, 502') that can be activated or deactivated and acting in the sense of a partial deflection over a preset distance of a part of the label or labels or blanks (P' , P'') in the area of the cutting line (11, 111) and that can be activated alternatively to the cutting knife (11, 111) and that act on the side of the stack opposite the side in correspondence of which the cutting of the band (F) is carried out, as the reciprocal position between the pushers (2, 602, 502, 502') and the cutting line of the knife (11, 111) is transversal offset between them;

d) means (13, 2, 202) of realignment of the stack or bundle (2) in the initial position after the execution of the cut and that are formed by mobile pushers of realignment acting in the opposite direction of the one of the deflecting pusher (2, 602, 502, 502').
Device according to the claim 15, characterized by the fact that the pusher means (12) of realignment of the bundle or the stack (P) are provided in combination with stop surfaces of realignment (202) on the opposite side, or on the side of the bundle or stack (P) on which act the deflector means (602, 502, 502').
Device according to one or more of the preceding claims, characterized by the fact that the means of deflection and the means of realignment (2, 602, 502, 12, 202) and/or stop plates of the deflection and the pusher of realignment are such whereby they act alternating between each other.
Device according to one or more of the preceding claims, characterized by the fact, that it has also means of realignment in one or more directions substantially parallel or in any case with a relevant component parallel to the cutting line and according to the geometrical shape of the layout of the label or of the blank.
Device according to one or more of the preceding claims, characterized by the fact that it has means to hold the stack or bundle (P) in the different conditions, in particular clamping means (102, 21) of the stack or bundle (P) of labels or blanks in the perfectly realigned condition and that are activated after the realignment cycle and remain active during the cycle of discharge or of exit from the cutting station (S).
Device according to one or more of the preceding claims, characterized by the fact that the means of deflection (602, 502, 502'') of part of the labels or blanks for lifting the band (F) from the bundle or stack (P) in the area of the cutting line, the realignment stopping means (202) of the labels or blanks relative to the part (P', P'') of the same subjected to the deflection and the means (102, 21) clamping the stack (P) in the condition of deflection during the cutting and realignment of the stack as well as the drive actuators of said means are integrated in the means (2) feeding the bundle or stack (P) to the cutting station.
Device according to one or more of the preceding claims, characterized by the fact that said feeding means are formed by a conveyor bracket (2) supported movable along guides (3, 103, 7) on a path at least two dimensional, preferably three dimensional and the said bracket (2) has a support ledge (102) of the stack or bundle (P), preferably designed to support said bundle or stack (P) in the mid section, a number of pushers (21) opposite to the support ledge (102) and that can be activated moving in the two directions in direction of approaching and of moving away from the said ledge (102), a support plate (202) of the side of the bundle or stack (P) opposite to the one along in which the band (F) is cut and at least one oscillating pusher (602), preferably a pair of oscillating pushers (602), acting respectively on the two sides of the support plate (202) of the bundle or stack (P) on side opposite to the cutting area of the band (F), the said pushers (602) have a flat surface with at least one projection of deflection (502, 502') in a preestablished position such, that the plunger (602) in active position extends itself perfectly level with the said support plate (202) with the projection or projections (502, 502') protruding beyond the same and in such a position as to extend itself on one or the other or on both sides of the cutting line (11, 111) and at a certain distance from the same, whereas in the inactive position, the said pushers (602, 502, 502') are distanced from the stack (P) of blanks.
Device according to one or more of the preceding claims, characterized by the fact that the cutting knife (11, 111) is housed in a box (104) in correspondence of a pass through slot (204) of a front stop plate (304) of the bundle or stack (P), whereas the box (104) is movable in the two directions (5, 6) perpendicular to said plate (304), at least in a dimension corresponding to the lifting of the band (F) from the bundle or stack (P).
Device according to the claim 22, characterized by the fact that the box (104) has clamping means, for example the suction nozzles (3), 31) and the eventual means of realignment in a direction transversal to the one of the cutting, as well as all the drive actuators of said means.
Device according to the claim 22, characterized by the fact that the box (104) has also means of realignment (12) and the drive actuators of the same, the said means (12) are constituted by flat pushers that finish at least in certain areas.