EP1977904B1 - Method for operating the stapler device of a web-fed printing press - Google Patents

Description

The invention relates to a method for operating a stapling apparatus, in particular a wire stapler, a web-fed printing machine according to the preamble of claim 1.

In web-fed rotary printing presses, printing material webs are printed in printing units. After printing on the printing material webs they are usually separated by longitudinal cutting into a plurality of partial webs, wherein partial webs produced in the region of so-called harps by longitudinal cutting of the printed printing substrate webs are deposited on one another to form a plurality of strands. It is of course also possible that uncut printed substrate webs in the harps are deposited on each other to form several strands.

The strands are provided with a longitudinal fold in the region downstream of the harp folding formers, wherein the longitudinally folded strands are combined in the region of a folder top to form a total strand. Of the total strand are in the range of a folding cassette, which is arranged downstream of the folder top, separated in the range of a cutting blade cylinder by cross cutting copies, the separated by cross cutting of the total strand copies are then transversely folded in the folder.

Between the formers and the folding cassette usually at least one stapler is arranged to connect printing material webs or partial webs by wire stapling or gluing or by perforation in the sense of stitching together. A stapler, in which a wire stitching is done, is also referred to as Drahtheftapparat.

As already mentioned, in the area of the cutting knife cylinder of the folding cassette, individual pieces are separated from the total strand by cross cutting, wherein it is important that the edge of the copies produced by cross cutting has a defined distance from the printed image. This defined distance of the edge of the copies produced by cross-cutting from the printed image of the same is also referred to as cross-sectional register.

The regulation of the cross-section register is already state of the art. To this is on the EP 1 074 501 B1 refer.

Then, if the cross-sectional register is controlled by means of a cross-sectional register control, this can have an effect on the stapler since, if necessary, the location of the staple in the specimen changes. This is particularly problematic when the cross-section register is subject to a major change during a startup or shutdown of the web press. In this case, a lot of waste is then produced in the stapler. So far, no solutions are known from the prior art, which take this problem into account.

Further prior art is known from WO 96/26148 A1 known.

On this basis, the present invention has the object to provide a novel method for operating a stapler of a web-fed printing press. This object is achieved by a method according to claim 1.

With the invention, in particular during startup and shutdown of the web-fed printing machine, the production of waste paper in the stapler can be avoided.

Fig. 1:

ein Blockschaltbild zur Verdeutlichung des erfindungsgemäßen Verfahrens zum Betreiben eines Heftapparats einer Rollendruckmaschine.

Preferred embodiments of the invention will become apparent from the dependent claims and the description below. An embodiment of the invention will be explained in more detail below, without being limited thereto. Showing:

Fig. 1:

a block diagram to illustrate the inventive method for operating a stapler of a web press.

Hereinafter, the present invention will be described with reference to the block diagram of Fig. 1 described in detail. In the block diagram of Fig. 1 are shown in solid lines from a cross-sectional register control elements or modules of a printing press, namely a cross-section register controller 10, based on a control deviation between an actual value Y _{QSR, is} the cross-section register and a setpoint Y _QSR, the cross-section register is a manipulated variable X _QSR for actuators 11 generates the cross-sectional register control.

For the purposes of the present invention, it is proposed to generate on the basis of the cross-sectional register control a control command for a stapler, in particular a wire stapler, the web-fed rotary printing press, so that the stapling in the stapler is dependent on the cross-sectional register control, namely controlled.

So shows Fig. 1 in that a manipulated variable X _{QSR of} the cross-sectional register control with the aid of a device 12 generates an actuating signal X _HA for controlling and thus adjusting a stapling device 13. It is therefore within the meaning of the present invention to derive an actuating signal for the stapler from the manipulated variable of the cross-sectional register control.

wobei X_HA das Stellsignal zur Steuerung des Heftapparats ist, wobei X_QSR das Stellsignal der Querschnittregisterregelung ist, und wobei k ein druckmaschinenabhängiger Proportionalitätsfaktor ist.According to an advantageous development of the present invention, the actuating signal X _HA for controlling the stapling apparatus 13 is determined according to the following formula: $${\mathrm{X}}_{\mathrm{HA}}=\mathrm{k}*{\mathrm{X}}_{\mathrm{QSR}}$$

where X _{HA is} the control signal for controlling the stapler, where X _{QSR is} the control signal of the cross-sectional register control, and where k is a printing machine-dependent proportionality factor.

The inventive method for operating a stapler is preferably used in wire staplers, but the same can also be used in such staplers, in which a stapling is done by gluing or perforating. In particular, during startup and during shutdown of the web-fed rotary printing press, the production of waste in the stapler can be avoided with the aid of the method according to the invention.

LIST OF REFERENCE NUMBERS

10

Controller of the cross-section register control

11

Actuator of the cross-section register control

12

Facility

13

stitcher

Claims (2)

1. A method for operating a stitching apparatus, in particular a wire stitching apparatus, of a reel-fed printing press, characterized in that from a control of the cross cut compensator, namely from an control input of the cross cut compensator control, a control command or control input for controlling the stitching apparatus is generated.
2. The method according to Claim 1, characterized in that the control input for controlling the stitching apparatus is determined according to the formula X_HA = k*X_QSR, wherein X_HA is the control input for controlling the stitching apparatus, wherein X_QSR is the control input of the cross cut compensator control, and wherein k is a printing press-dependent proportionality factor.

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