EP1588813A1 - Stitching device with feeding apparatus for at least one continuous wire - Google Patents

Abstract

The stitching machine (1) has a feed for a continuous stitching wire (06;04) from a supply with a conveyor for a continuous feed of the ire from the supply and second conveyor (3) to move it from an intermediate feed to the machine. The feed can include an electric motor (04). The machine can have a separator for removing sections of the wire.

Description

The invention relates to staplers with a feeding device for feeding at least an endless stitching wire according to the preamble of claim 1 or 3.

DD 100 437 shows a feeding device for feeding at least one endless one Stapling wire from a stapling wire stock moved into one when feeding as a whole Stapler with a first conveyor for continuously conveying the Stapling wire from the stitching wire supply and with a second conveyor for Conveying the stitching wire.

BE 554 705 A discloses a feeder with an intermediate storage formed loops of the supplied material.

DE-PS 123 706 describes a stapler in which the switching of Double production takes place on collective production by changing the stitching wire feed.

The invention is based on the object staplers with a feeder for Supplying at least one endless stitching wire with improved wire feed create.

The object is achieved by the features of claim 1 or 3.

The achievable with the present invention consist in particular that the Switching the stapler from the first to the second mode Reconfigure the separator or the second stapling head no longer necessary is. The second stapling head remains in the same position as in the second operating mode in the first mode of the stapler. As a result of the batch feeder is the second stapling head in the second mode, however, not supplied with wire sections, so that the second stapling head perform a stapling movement in the second mode like in the first mode, but there is no stitching, because the second stapling head of the necessary wire section is missing. This allows one hand simplified construction of the stitching heads or the separating device, since they no longer must be reconfigurable.

As a further advantage of the invention eliminates the existing in known staplers Sliding gear for the wire feed complete with a complete for this Sliding gear needed oil space. This leads to a considerable simplification of the mechanical execution of the stapler and affects both its favorable Production costs as well as its operating costs, because z. B. no gear oil level more maintenance. Another great advantage of the stapler is that switched between the modes during operation of the stapler can be. The stapler does not have to be stopped, nor must the second stapling head be accessible. Effort and time to switch between the Operating modes are therefore significantly reduced. In addition, this is the stapler completely remotely controllable from a control room. Unlike known Staplers, the switching can now be carried out automatically, so that a computer-aided control of the stapler is implementable.

As with known staplers can also be the stapler in the first mode the feeding device continuously feed the stitching wire. The stitching wire can then move at a fixed speed. With the batchwise feeding of the second Mode, however, the speed of the stitching wire is subject to change. At times, speeds may be greater than the fixed ones Speed of stitching wire in the first mode. For example, a Top speed of the stitching wire in the second mode be twice as large like a fixed speed of the stitching wire in the first mode.

In the second mode of operation, the stitching wire may become uniform during feeding accelerated or decelerated. This can be during an acceleration phase of the stitching wire or during a deceleration phase of the stitching wire or both occur during acceleration as well as during deceleration of the stitching wire. The Delay phase may occur immediately after the acceleration phase be initiated so that the stitching wire immediately upon reaching his Top speed is delayed again, without this top speed for to maintain for a longer time.

In a preferred embodiment of the stapler, the stapling heads are on one Stapling cylinder arranged. The stitching heads of the stapling head pair can be diametrically on Heft cylinder be arranged. It is also possible to have a plurality of in the axial direction staggered pairs of stitching heads on the stitching cylinder provided.

Particularly preferably, the separator comprises blades which are paired to Shearing the stitching wire together. The blades on the Heftköpfen be formed. For example, it may be at the stapling heads trained blades act around protrusions, with which the stitching heads in Interaction of another blade, which is an edge of an exit z. B. a nozzle (cutting nozzle) of a tube through which the stitching wire is fed, or simply a stationary stop can act, a respective wire section Shear off the stitching wire. Then shear in the first mode of the stapler both the first stapling head and the second stapling head detach wire sections from the stapling wire, in order to perform a stapling with these afterwards. In the second mode shears only the first stapling head a wire section from the stitching wire, while the second Stapling head as a result of the batchwise supply of the stitching wire no wire section can shear because the stitching wire has not yet been fed.

The stapler is most preferably designed such that it during a Operation between the first and the second mode is switchable. He is suitable therefore particularly well suited for use in a central control room Press.

The feeding device of the stapler preferably comprises a first and a second conveyor, wherein the first serves, in both modes stitching wire to continuously promote from one main stock to an intermediate stock and the second at least in the second mode, the stitching wire from the intermediate supply intermittently further. Such an embodiment is particularly advantageous when it applies, by means of the second clamp the stitching wire from a when feeding as a whole moving stapler main stock, such as a wire reel to remove. Because such a coil of wire may have a considerable mass of up to 100 kg the first conveyor can apply considerable torque; there she keeps the main supply moving evenly due to continuous production Nevertheless, a low acceleration capacity is sufficient, i. H. a low one Drive power of the first conveyor. The second conveyor on the other hand In the second operating mode, it only has to accelerate the content of the intermediate supply. However, its mass corresponds only approximately to that of a staple, so that despite a low drive power and the second conveyor for timely supply the bonding wire required high accelerations can be achieved.

Because the stitching wire in the second mode of the second conveyor accelerated and decelerated, while from the first Conveyor continuously fed, it comes to a periodic forming jam of the stitching wire on the second conveyor. In order for in the second mode before the second conveyor accumulate periodically Stitching wire to create space for evasion is also particularly preferred Storage space for the stitching wire between the first and the second conveyor intended.

In the first mode, the second conveyor can operate continuously, so that, like the first conveyor, it continuously advances the stitching wire, or the second conveyor may be turned off the stitching wire in the first mode be. In the latter case, the first conveyor alone provides for the forward movement and the feeding of the stitching wire. Of course it is also possible, the second Conveyor during the first mode intermittently, albeit with an im Medium higher conveying speed than in the second mode to operate; Whether this is appropriate depends inter alia on the geometric conditions of the Stapling heads and their movement.

Advantageously, the feed device comprises a sensor for detecting the position of the respective stapling head to be supplied with wire sections. The feeder then preferably further comprises a control unit based in the second mode the detection results of the sensor controls the second conveyor. This will be an automated operation of the stapler possible.

The conveyors can, for example, a stapling the wire clamping Include roller pair. In general, it can be at the terminals but any other means clamping the stitching wire and advancing means such. B. Grippers in various designs, jaws, etc.

Embodiments of the invention are illustrated in the drawings and are in Described in more detail below.

Fig. 1

eine schematische Skizze eines Heftapparates in Vorderansicht;

Fig. 2

den Heftapparat aus Fig. 1 in Seitenansicht;

Fig. 3a

ein Geschwindigkeits-Zeit-Diagramm für einen Heftdraht in der ersten Betriebsart des Heftapparates;

Fig. 3b

ein Ort-Zeit-Diagramm für einen Heftdraht in der ersten Betriebsart des Heftapparates;

Fig. 4a

ein Beschleunigungs-Zeit-Diagramm für einen Heftdraht in der zweiten Betriebsart des Heftapparates;

Fig. 4b

ein Geschwindigkeits-Zeit-Diagramm für einen Heftdraht in der zweiten Betriebsart des Heftapparates;

Fig. 4c

Ort-Zeit-Diagramm für einen Heftdraht in der zweiten Betriebsart des Heftapparates;

Fig. 5

eine weitere Ausführung eines Heftapparates in Vorderansicht;

Fig. 6

den Heftapparat aus Fig. 5 in Seitenansicht;

Fig. 7

eine Zuführeinrichtung.

Show it:

Fig. 1

a schematic sketch of a stapler in front view;

Fig. 2

the stapler of Figure 1 in side view.

Fig. 3a

a speed-time diagram for a stitching wire in the first mode of the stapler;

Fig. 3b

a location-time diagram for a stitching wire in the first mode of the stapler;

Fig. 4a

an acceleration-time diagram for a stitching wire in the second mode of the stapler;

Fig. 4b

a speed-time diagram for a stitching wire in the second mode of the stapler;

Fig. 4c

Place-time diagram for a stitching wire in the second mode of the stapler;

Fig. 5

another embodiment of a stapler in front view;

Fig. 6

the stapler of Figure 5 in side view.

Fig. 7

a feeder.

In Fig. 1 is a schematic representation of a stapler in front view to see. Fig. 2 shows the stapler of Fig. 1 from a lateral view. On a lateral surface a rotatably mounted stitching cylinder 03 is a pair of stitching heads 01; 02, consisting from a first stapling head 01 and a second stapling head 02, arranged. The stitching heads 01; 02 are arranged diametrically on the stitching cylinder 03. The stitching heads 01; 02 each have two projections 08; 17, z. B. blades 08; 17, which has a recess 18 or limit 19 in the longitudinal direction of the stapling cylinder 03. The protrusions 08; 17 each have a directed in the radial direction of the stapling cylinder 03 stage 22. In Fig. 1, this step 22 is located at the projections 17 of the stapling head 02 on the facing away from the viewer and is therefore not visible.

A feed device 04, 07 essentially comprises one parallel to the longitudinal axis of the Stapling cylinder 03 extending feed tube 04 and a servo motor 07, z. B. one Electric motor 07 drives a pair of rollers. At a tack side end forms the Feed tube 04 an edge 21. An unrolled from an endless roll, not shown Stapling wire 06 is clamped between the rollers driven by the servo motor 07 and is pushed by them through the feed tube 04. A wire section 09 of the Stapling wire 06 protrudes in FIG. 1 from the end of the feed tube 04 that is at the stapler head. FIG. 1 shows this wire section 09 in a moment immediately before he Cooperation of the edge 21 of the feed tube 04 and facing this edge Projection 08 or 17 of the stapling head 01 is sheared off from the stitching wire 06.

For clarity, a cylinder 23 is used to staple the stapler cooperates, and a bending roller 28 is not shown in Fig. 1; but they are for it but in Fig. 2 located.

The stapler is employed on the rotatably mounted cylinder 23, the closing plates 26 has. In the side view of the stapler is a dashed line circumferential circle 27th drawn in, the ends of the stitching heads 01; 02 during a rotation of the stapling cylinder Go through 03. This peripheral circle 27 forms with the cylinder 23 a stitching gap, through a staple stack of sheets 24 is guided by sheets. A bending roller 28 is at the height of the recesses 18; 19 such between the stapler and the cylinder 23 arranged that it partially penetrates into the circumferential circle 27 and thereby in the Recesses 18; 19 intervenes.

In a first mode of the stapler, the stapling cylinder 03 rotates in through an arrow in Fig. 2 indicated direction. During the rotation of the stapling cylinder 03 is the stitching wire 06 from the servo motor 07 continuously through the feed tube 04 pushed, so that at the end of the staple head feed tube 04 outstanding wire section 09 of the stitching wire 06 evenly over time gets longer. The propulsion speed of the stitching wire 06 and the rotational speed of the stapling cylinder 03 are coordinated so that when the wire section 09 has reached the width of the stapling head 01 or 02 corresponding length I, the step 22nd a stapling head 01 or 02, in FIG. 1 that of the first stapling head 01, the stapling wire 06 presses against the edge 21 and a wire section 09 from the stitching wire 06 shears off. Of the Wire section 09 is taken from the stapling head 01.

With this wire section 09, the stapling head 01 leads, in a known manner, to a stitching of the stapling head Stack of sheets 24 out. For this purpose, the wire section 09 in the further course of Rotation pressed against the bending roller 28. Because the bending roller 28 is arranged such that when passing through a stapling head 01; 02 in its recess 18; 19 intervenes, the wire portion 09 of the bending roller 28 in the respective recess 18; 19 pressed. Thereby, the wire portion 09 becomes a shape having a straight line Middle section and two legs bent at 90 ° bent. When the stapling head 01 reaches the cylinder 23, he pushes the then bent wire section 09 with the Tips of the legs ahead through the stack of sheets 24. The cylinder 23 has gone up rotated so far that one of the closing plates 26 the stapling head 01 is opposite. With the closing plate 26 of the stapling head 01 acts together and performs the stapling of Stack of sheets 24 with the wire section 09 to the end.

Meanwhile, the stapling cylinder 03 continues to rotate and also the stitching wire 06 is continuously pushed by the servo motor 07 through the feed tube 04, so that upon arrival of the stapling head 02 at the end of the feed tube 04 at the end of the stapling head new wire section 09 of length I protrudes from this, the on the plane described way abuts the projection 08 of the stapling head 02 and of the stage 22 and the edge 21 is sheared off. The new wire section 09 is from the second Stapling head 02 taken, whereupon this as the first stapling head 01 to the same described manner performs a stitch with him. Subsequently, the repeated Operation in the manner described.

In this mode of operation of the stapler described above, stitches become both alternately executed by the first stapling head 01 and the second stapling head 02. In the Printing technique is called this mode double production. But it is also one Collective production of the stapler known in the before the execution of the stapling two Stack of in one of the stapler upstream printing unit sequentially on a Material strand printed printed pages collected to a combined stack and this stack is then stapled. The clock rate at which the staples to staple on Stapling arrive here is only half as large as in the double production. In the Collective production is therefore only one of the two stitching heads 01; 02 for stapling used. For this it is necessary in known staplers, the respective not stapling head 01 or 02 umkonkonfigurieren so that with its projections 08 or 17 and the edge 21 no wire section 09 can be sheared off more. moreover a feed speed of the stitching wire 06 must be reduced so that the Wire section 09 when shearing off by the respective stapling stapling head 01 or 02 has the correct length I.

For clarification, in the case of the double production in FIG. 3 a a speed-time diagram and in FIG. 3 b an associated location-time diagram for the tip of the stitching wire 06 are shown. Since the stitching wire 06 is fed with continuous speed v in the double production, the speed v of the stitching wire 06 has the constant value v ₁ for all times t. This is shown in the speed-time diagram of FIG. 3a. In the time-time diagram of FIG. 3b, the path traveled by the stitching wire 06 corresponds to the removal of the tip of the stitching wire 06 from the edge 21, this path being at the same time the length of the wire section 09 of the stitching wire 06 protruding at the stapler side end of the feed tube 04. From time t = 0, this wire section 09 begins to form; its length increases linearly up to time T ₁ . At the time T ₁ , the end section has reached the length I and is sheared off from the stitching wire 06 by the projection 08 of the stitching head 01 and the edge 21 as the wire section 09 having this length I. From time T ₁ , a renewed projecting wire section 09, whose length in turn increases linearly, is formed at the end of the feed tube 04 at the head end. This new wire section 09 is sheared off at the time T ₂ from the projection 17 of the second stitching head 02 and the edge 21 also with a length I as the wire section 09. The process is repeated from time T ₂ , so that at time T ₃ again a wire section 09 of length I from the projection 08 of the first stapling head 01 and the edge 21 and at time T _4, a wire section 09 of length I from the projection 17 of the second Stapling head 02 and the edge 21, etc., is sheared off.

Corresponding diagrams are shown for the advancement of the stitching wire 06 for the second mode of operation, ie in collective production, in FIGS. 4a, 4b and 4c. In the stapler, the feed of the stitching wire 06 in the second mode is in batches, wherein in FIGS. 4a, 4b and 4c, a preferred variant of such a batch feed is shown. The type of feed can be easily adjusted via the servo motor 07. According to the acceleration-time diagram of Fig. 4a the stitching wire 06 from the time t = 0 to time t _1, wherein t ₁ = T _1/2, accelerated at a constant acceleration a _0. From the time t ₁ to the time T ₁ , the stitching wire 06 with an acceleration -a ₀ with the same amount as a ₀ , but with the opposite sign, delayed. The associated speed profile of the stitching wire 06 is shown in Fig. 4b. Between the time t = 0 and the time t ₁ , the speed v of the stitching wire 06 increases linearly up to a peak value v ₂ , in order to linearly fall back to the value 0 from the time t ₁ to the time T ₁ . The peak value v _{2 is} twice as large as the constant velocity v _{1 of} the stitching wire 06 in the case of double production: v ₂ = 2-v ₁ . As shown in FIG. 4c, the projection of the stitching wire 06 at the end of the feed tube 04 has increased in the time from t = 0 to T ₁ to the value I. At time T ₁ , this projection is sheared from the projection 08 of the stapling head end of the feed tube 04 passing stapling head 01 and the edge 21 and taken as a wire section 09 with a length I. In the period between the time T ₁ and the time T ₂ , ie between the passage of the first stapling head 01 and the second stapling head 02 at the end of the feed tube 04, the stapling wire 06 remains at rest and undergoes no advance. Both its velocity v and its acceleration a are zero. For this reason, no projecting wire section 09 is formed at the end of the feed tube 04, so that the projection 17 of the second stapling head 02 passing at time T ₂ does not shear the wire section 09 with the edge 21. Only after passing the second stapling head 02, from the time T ₂ , the stitching wire 06 is accelerated until the time t ₃ in the same manner as described above, from the time t ₃ to the time T ₃ , to which the first stapling head 01 the firing head end of the feed tube 04 again happens to be decelerated. At time T _3, therefore, the projection 08 of the first stapling head 01 and the edge 21 shear off a length I wire section 09 as before, and the first stapling head 01 takes it along. The process is repeated as just described. In this way, without a shutdown of the second stapling head 02 would be necessary, why the operation of the stapler would have to be interrupted, a collective production of the stapler allows. By suitable control of the servo motor 07 can be switched between double production and collective production even during operation of the stapler. Because the control of the servo motor 07 can also be done by a computer, an automatic switching between double production and collection production is also possible.

In Figs. 5 and 6, another embodiment of a stapler once in Front view and once shown in side view. In addition to a first stapling head pair 01, 02, this stapler has a second stapling head pair 11, 12, which is on the same Stapling cylinder 03 as the first stapling head pair 01, 02 is arranged, with each diametrical arrangement of the stitching heads 01; 02, 11; 12. The stapling head pairs 01, 02 and 11, 12 are arranged staggered in the axial direction of the stapling cylinder 03. The stitching heads 11; 12 have protrusions 29; 31, z. B. blades 29; 30 on. A first feed tube 04 serves for Supply of stitching heads 01; 02 with wire sections 09, from a first stitching wire 06, as described above, of protrusions 08; 17 of the stitching heads 01; 02 and the edge 21 sheared off. In addition, a second supply pipe 13 for supplying the Pair of stitching heads 11; 12 provided. It has an edge at the head end 32 on. Through this feed tube 13, a stitching wire 14 is supplied, of which the Protrusions 29; 31 of the stitching heads 11; 12 with the edge 32 each wire sections 16th shear. In order to abut a stapling head 01; 02 of the first pair of stitching heads 01; 02 to avoid the second feed tube 13, the feed tube 13 to that in Fig. 5th shown manner and forms between the stitching head pairs 01, 02 and 11, 12 two Bends.

In this embodiment of the stapler result in the double production all stitching heads 01; 02 and 11; 12 stitches out. In the collection production leads from each stapling head pair 01, 02 and 11, 12 only one stapling head 01; 11 or 02; 12 stitches out. For example, only the stitching heads 01 and 11 execute stitches in the collective mode, while the stitching heads 02 and 12 by suitable batchwise feeding the respective Stapling wires 04 and 14 are not equipped with respective wire sections 09 and 16, so that they can not execute stitches. In a similar way are too Staplers with even more pairs of stapling heads possible.

A preferred embodiment of the feed device 33 of a stapler is shown in FIG. 6 in schematic form. To see is a stapling cylinder 03 with two stapling heads 01; 02 in the Side view and a stitching wire 06 of a stitching wire stock, z. B. a wire roll 42 unwinding and the stitching heads 01; 02, or one of the stitching heads 01; 02, feeding Feeding device 33. In order to make the stapling cylinder 03 better recognizable in FIG. 6, it is shown from a direction parallel to its axis; the feeder 33 whereas, by contrast, a viewing direction turned by 90 °. In fact, that is Conveying direction of the stitching wire 06 substantially parallel to the axis of the stapling cylinder 03, as shown in Figs. 1 and 5.

The feeder 33 includes a first motor 37, z. B. electric motor 37 with a driven by this first conveyor 38, z. B. pair of rollers 38 and a second motor 34, z. B. electric motor 38 with a second driven by this Conveyor 36, z. B. pair of rollers 36, and a wire cutting nozzle 39 with Feed tube 04 and edge 21, and a sensor 41 with control unit. The roller pairs 36; 38 are spaced from each other by a storage space 43. The one of the wire reel 42 unwound stitching wire 06 only passes through the first pair of rollers 38, passes through the Storage space 43, then passes through the second pair of rollers 36 and finally reaches the feed tube 04 of the wire cutting nozzle 39, from which it exits at the edge 21.

If the stapler is operated with the feeder 33 in the first mode, so drives the first motor 37, the first pair of rollers 38, which the stitching wire 06 of the up to 100 kg heavy wire roll 42 unwinds continuously. With the same constant Speed v at which the stitching wire 06 is transported by the pair of rollers 38 is, the stitching wire 06 from the second pair of rollers 36, the weaker second Motor 34 is driven, inserted into the feed tube 04 and exits at the edge 21 the wire cutting nozzle 39 from. As described above, is a well-worn Wire section 09 alternately from one of the stitching heads 01: 02 from the stitching wire 06th separated and taken away.

In an alternative embodiment of the feeder 33, the rollers of the second Roller pair 36 in the first mode of stitching wire 06 abstellbar, so that the Stapling wire 06 is driven by the first pair of rollers 38 alone.

In the second mode, in which the stitching wire 06 is supplied in batches, drives the first motor 37, the second pair of rollers 38 uniform as in the first mode on, so that the second pair of rollers 38, the stitching wire 06 continuously from the wire roll 42 unwinds and transports, but with one in comparison to the first Bettriebsart halved speed v, so that per revolution of the stapling cylinder 03 only the length a single staple is unwound from the wire reel 42. In contrast to first mode, however, the first motor 34 is the one with the sensor 41st connected control unit always set in motion when the sensor 41 the Passage of the stitching head to be supplied with stitching wire 01 is detected.

As long as the second pair of rollers 36, the jammed from the first pair of rollers 38th conveyed stitching wire 06 between the pairs of rollers 38; 36, and the stitching wire 06 forms in the storage space 43 between the pairs of rollers 38; 36 a dashed line in FIG drawn intermediate reserve, z. B Wire loop 44. When the control unit releases the Motor 34 is set in motion, stitching wire 06 from the wire cutting nozzle 39th output, and the wire loop 44 is pulled straight again. The rollers of the second pair 36 are lightweight, with low moment of inertia, designed to a high acceleration by the motor 34 despite low power of the same allow, and the clamping force between the rollers of the pair 36 and the stitching wire 06 is not significantly larger than to accelerate the stitching wire 06 of the wire loop 44 required. The second motor 34 therefore requires no precise Speed control; as soon as the stitching wire 06 in the storage space 43 - in good time the passage of the stapling head 01 in front of the edge 21 - pulled tight, he slips between the rolls of the pair 36, so that between the time of getting tightened the stitching wire 06 and the shearing by the stapling head 01, the propulsion speed the stitching wire 06 is determined by the speed v of the first pair of rollers 38.

In conjunction with the shearing off, the control unit switches the second motor 34 back on out, so that after shearing no stitching wire 06 more of the wire cutting 39th exits until the stapling head 02, which is not to be supplied, has passed the edge 21.

As soon as the sensor 41 again detects the stapling head 01, the cycle is repeated.

LIST OF REFERENCE NUMBERS

01

stapling head

02

stapling head

03

stitching cylinder

04

feed

05

-

06

stitching wire

07

Servomotor, electric motor

08

Projection, blade

09

wire section

10

-

11

stapling head

12

stapling head

13

feed

14

stitching wire

15

-

16

wire section

17

Projection, blade

18

recess

19

recess

20

-

21

edge

22

step

23

cylinder

24

bow

25

-

26

closing plate

27

peripheral circle

28

bending roller

29

Projection, blade

30

-

31

Projection, blade

32

edge

33

feeding

34

Engine, second, electric motor

35

-

36

Conveyor, pair of rollers, second

37

Engine, first, electric motor

38

Conveyor, pair of rollers, first

39

Drahtschneiddüse

40

-

41

sensor

42

Stitching wire stock, wire roll

43

Jam rough m

44

Intermediate storage, wire loop

a

acceleration

I

length

t

Time

v

speed

a ₀

acceleration

-a ₀

acceleration

T ₁

time

T ₂

time

T ₃

time

T ₄

time

t ₁

time

t ₂

time

t ₃

time

t ₄

time

v ₁

Speed, value

v ₂

Speed, peak

Claims (23)

A stapling apparatus comprising feeding means (04, 07, 13, 33) for feeding at least one continuous stapling wire (06, 14) from a stapling wire supply (42) to a stapling apparatus, having a first conveying means (38) for continuously conveying the stapling wire (06, 14) ) from the stitching wire stock (42) and with a second conveying device (36), characterized in that the first conveying device (38) is arranged to convey the stitching wire (06; 14) into an intermediate stock (44) such that the second conveying device (36) the stitching wire (06; 14) is intermittently conveyed from the intermediate supply (44). Stapling apparatus according to claim 1, characterized in that the feed device (04, 07, 13; 33) has an electric motor (07; 34; 37). A stapling apparatus comprising feeding means (04, 07, 13, 33) for at least one continuous stapling wire (06, 14), separating means (08, 17, 29, 31, 21, 32) for severing wire portions (09, 16) from the stapler supplied stitching wire (06; 14) and at least a first and a second pair of stitching heads (01, 02; 11, 12), which are supplied with the at least one stitching wire (06; 14) generated wire sections (09; and optionally either in a first mode both stitching heads (01, 02, 11, 12) of the two pairs of stitches are arranged executing or in a second mode only the stitching heads (01, 11) of the first pair of stitching executions are arranged, wherein in the second mode of operation of the feed device (04, 07, 13, 33) the stitching wire (06; 14) feedingly arranged, characterized in that the feed device (04, 07, 13, 33) has an electric motor (07; 34; 37) , Stapling apparatus according to claim 3, characterized in that the electric motor (07; 34; 37) in the first operating mode is driven according to a first speed-time diagram and in the second operating mode after a second speed-time diagram different from the first. Stapling apparatus according to claim 3, characterized in that in the first operating mode, the feeding device (04, 07, 13; 33) is arranged to supply the stitching wire (06; 14) continuously in a continuous manner. A stapler according to claim 1 or 3, characterized in that the feeding device (04, 07, 13; 33) intermittently feeds between a first mode of operation in which it feeds the stitching wire (06; 14) and a second mode in which it receives the stitching wire (06; 14) continuously feeds, is switchable. A stapler according to claim 3 or 6, characterized in that the feed device (04, 07, 13, 33) is switchable during operation between the first and the second operating mode. A stapling apparatus according to claim 3, characterized in that a first conveying device (38) conveys the stapling wire (06; 14) into an intermediate stock (44), that a second conveying device (36) removes the stapling wire (06; 14) from the intermediate stock (44). arranged intermittently promoting. Stapler according to one of claims 6 and 1 or 8, characterized in that the second conveyor (36) in the first mode of the stitching wire (06, 14) is turned off. A stapler according to claim 3 or 6, characterized in that a tip speed of the stitching wire (06; 14) in the second mode is twice as fast as a speed of the stitching wire (06; 14) in the first mode. Stapling apparatus according to claim 3 or 6, characterized in that the stitching wire (06; 14) is moved evenly accelerated or decelerated in the second operating mode during feeding. Stapling apparatus according to claim 1 or 3, characterized in that the feed device (04, 07, 13, 33) has a sensor (41) for detecting the position of the respective stapling head (01, 02, 11, 11, 16) to be supplied with wire sections (09, 16). 12). A stapler according to claim 12 and 3 or 6, and that the second conveyor (36) in the second mode based on the detection results of the sensor (41) is controlled. A stapling apparatus according to claim 1 or 8, characterized in that each delivery device (36; 38) is associated with its own electric motor (34; 37). Stapling apparatus according to claim 1 or 8, characterized in that a storage space (43) for the intermediate supply (44) is arranged between the first and the second conveying device (36; Stapling apparatus according to claim 1 or 8, characterized in that the conveying devices (36; 38) each comprise a roller pair (36; 38). Stapling apparatus according to claim 3, characterized in that the stitching heads (01, 02, 11, 12) are arranged on a stitching cylinder (03). A stapler according to claim 17, characterized by a plurality of staggered pairs of stapling heads (01, 02, 11, 12) arranged on the stapling cylinder (03). Stapling apparatus according to claim 3, characterized in that the separating device (08, 17, 29, 31, 21, 32) comprises blades which cooperate in pairs for shearing the stitching wire (06, 14). Stapling apparatus according to claim 1, 17, 18 or 19, characterized in that blades (08; 17; 29; 31) are formed on the stitching heads (01; 02; 11; 12). Stapling apparatus according to claim 1 or 3, characterized in that the stapling apparatus has at least one stapling cylinder (03) with at least one stapling head (01; 02; 11; 12). Stapling apparatus according to claim 1, 3 or 21, characterized in that at least two stitching heads (01, 02, 11, 12) arranged axially next to each other are arranged. Stapling apparatus according to Claim 1, 3 or 21, characterized in that at least two staggered feed devices (04, 07, 13, 33) are arranged relative to the circumferential direction of a stapling cylinder (03).

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