EP0541936B1 - Device for applying glued cards or sleeves on a continuous web or on moving workpieces - Google Patents

Description

The invention relates to a device for applying preferably glued pieces of paper or tubular pieces to a running web or to continuous workpieces, preferably to the opened and still open bottoms of sacks, with pairs of preferred rollers for a material web and devices for perforating and tearing off or devices for separating the papers or Pieces of hose from the material web and with a takeover plier cylinder for taking over and then delivering the notes or hose workpieces.

If the notes are applied to the opened and still open bottoms of sacks, they are locking bolts or reinforcement labels or valves. A known from DE-PS 11 79 087 device of the type mentioned simultaneously pulls from two supply rolls a paper web and a plastic web in a superimposed form, the two-layer web by perforating knife at a distance from the slip with cross perforations is provided. A web is then lifted off by a guide roller and placed on the other web with an offset. Double sheets which are offset relative to one another are then torn off from the web in that the front end of the double web is gripped by folding pliers of the take-over plier cylinder and the web is held behind the perforation lines. The notes transported by the take-over plier cylinder are then formatted with glue applications by an adhesive application roller of an adhesive application device, and then the notes are applied by the take-over plier cylinder to the open floors which pass tangentially to it. By adding the bottoms, a filling valve is then formed on each bottom, the plastic layer of the double label protruding further into the inside of the sack than the paper layer, so that the inwardly projecting end of the piece of plastic tube can collapse under the filling pressure and perform its sealing function.

There are applications in which it is necessary to apply a further piece of paper or a piece of hose in addition to the piece of paper torn off a sheet or the piece of double sheet torn off a double sheet in order to meet other manufacturing requirements.

For example, in practice there is a need to apply an additional piece of tubing to the notes attached to the floor, which is shorter than the notes and protrudes outwards when the bottom is closed, so that after filling the bag the possibility is created of this to be sealed tightly by welding or gluing the piece of hose projecting beyond the floor to the outside.

In other cases it is necessary to provide the valves with a venting device so that air trapped in the sack can escape. This happens because the valve is at least partially enveloped by a fleece strip that allows air to escape.

In order to apply an additional piece of paper or a piece of tubing to the valve label (s) or to surround the filling valve formed from the valve label with a non-woven layer serving for ventilation, it is necessary in the known device, in the direction of passage of the bag bottom, to connect it to a further device, by separating the individual pieces from a tube sheet and placing them in the open floor on the pieces of paper that have already been applied, or to connect the device with a device which, for example, applies non-woven strips for ventilation. In order to expand the known device in the manner described, additional units must be provided which extend the overall length of the system and make the system more expensive. Furthermore, it is only possible with an unacceptable effort in the known device to retrofit it in such a way that these devices are connected upstream and / or downstream for applying additional notes or fleece strips.

The object of the invention is therefore to provide a device of the type specified at the outset, with which additional notes, pieces of tubing or fleece inserts can be applied economically to workpieces and in particular to the bottom of sacks. The device should be designed so that its overall length does not increase in principle. Furthermore, the possibility is to be created to retrofit existing devices and systems with reasonable effort.

According to the invention, this object is achieved in a device of the generic type in that an intermediate cylinder is arranged between an application folder cylinder applying the slip and / or hose pieces and the take-over cylinder which forms a roller gap with the application cylinder cylinder, in the longitudinal direction of a second material web Lines of perforation torn or separated pieces of paper or hose run in, and which delivers the pieces of paper or hose pieces torn or separated from the first and the second material web in an at least partially overlapping form to the continuous workpieces or floors. In the device according to the invention, complete application devices are avoided for the application of additional notes, hose pieces or inserts, since the additional notes, hose pieces or inserts are combined with one another to be applied to units to be applied before application to the floors or workpieces, which units are then applied together in the correct format by one work step . The device according to the invention therefore not only leads to a shortening of the overall length, but in particular also to a reduction in the number of application rollers, since two scoring lines work on a common applicator folding cylinder.

According to an advantageous embodiment it is provided that the intermediate cylinder or the like with a row of needles. to take over the notes or the like. is provided by the takeover cylinder.

On the intermediate cylinder, a glue application roller of a gluing plant can be employed, which the like or the like. with format-based glue applications.

According to an advantageous embodiment of the invention it is provided that the intermediate cylinder or the like in the direction of rotation in front of the row of needles with a folding strip. is provided, or the like, the leading end of the piece of paper torn or separated from the second material web. into a folding pliers of the application cylinder. During the further run, the slip or double slip held on the intermediate cylinder then comes with its glue application with the slip or the like torn off from the second material web. in contact and glued to it so that it or the like from the note held on the application cylinder by the folding pliers. taken along with them is applied to the workpiece or the open floor.

A glue applicator roller of a second gluing unit is expediently attached to the application cylinder, which provides the adhesive, format, or adhesive strips that have been torn off or separated from the second material web.

An embodiment of the invention is shown below with reference to the drawing, in the single figure of which a device for applying combined note and / or tube packs, the notes and / or tube pieces of which have been torn off from separately fed material webs, is shown schematically in side view on the sack bottoms that have been pulled up , explained in more detail.

A two-layer web 1, one layer of which is made of paper and the other of which is made of plastic, which are drawn off from supply rolls, not shown, are preferred by the pair of feed rollers 2. The preferred pair of rollers 2 is followed by another pair of preferred rollers 3, the transverse perforation device 4 and deflection rollers 5 being arranged between the two pairs of rollers 2 and 3, by means of which the plastic web is offset in the longitudinal direction with respect to the paper web. The tearing off of the individual two-layer web pieces takes place between the pair of preferred rollers 3 and the pair of folding pliers cylinders 6, of which the cylinder provided with the folding pliers takes over the further transport of the double sheet. So far, the device is comparable to the device known from DE-PS 11 79 087.

The folding pliers cylinder of the pair of cylinders 6 then transfers the double sheet to a transfer cylinder 7 designed as an intermediate cylinder. This leads the sheet or double sheet past a gluing device 8, through which the inside of the slip is then sized with a glue application.

The take-over or intermediate cylinder 7 is provided with a row of needles for the purpose of taking over the slips or double slips, in front of which a folding bar or a folding sword is arranged, as seen in the direction of rotation. The double label torn off from the pair of folding pliers 6 is held by the row of needles, not shown, of the takeover or intermediate cylinder 7.

Upon further rotation of the intermediate cylinder 7, the fold bar arranged upstream of the needle row then comes into contact with the folding pliers attached to the applicator plier cylinder 9, so that the leading end of a tubular web 10 is held by the folding pliers and a piece of hose is thereby torn off along a transverse perforation line. The feeding of the tubular web 10 is described in more detail below. This piece of tubing is then glued to the glue previously applied to the inside of the double label, so that these double labels are carried along by the tube piece held on the applicator cylinder. During the further circulation of the application folding pliers cylinder, the piece of piece of hose and tube runs past the glue unit 11, by means of which this is provided with a glue application in terms of format. The so prepared and glued slip piece of tube package is then pressed onto the still open bottom 12 of a sack by the application folder cylinder 9.

The bottom is then increased in a known manner, so that a double-layer valve tube is formed from the double sheets, in which a further piece of tube torn off from the tube sheet 10 is inserted.

The tubular web 10 is first drawn off as a flat web 14 from a supply roll, not shown. It is then fed via the rollers 15, 16 and 17 to a tube forming device 18, in which the flat web is folded into a tube web 10. The hose 10 formed in this way can have the width of the subsequent base. But it can also be much narrower be trained.

Furthermore, there is the possibility of making the tubular web 10 wider than the finished floor in the flat state, so that the edges of the tubular web are folded over and folded over on both sides for reinforcement by adding the floor.

The tubular web 10 is preferred by a pair of preferred rollers 19 and 20, the web being provided with transverse perforations by the device 21 between the two pairs of preferred rollers 19 and 20 by the perforating device 21.

With the device described above, it is also possible to design the web 14 as a single-layer or double-layer web and to dispense with the tube-forming station 18, so that an additional slip is applied to the slip or double slip transported by the intermediate cylinder 7. The web 1 can also be designed as a nonwoven web, so that after the bottom has been formed, a filling valve surrounded by a nonwoven web is formed by covering the bottom.

If necessary, the deflection rollers 5 to offset a double-layer web can be dispensed with.

Claims (5)

1. Apparatus for applying preferably glued tabs or tube pieces onto a running web or onto through-running workpieces (12), preferably onto the bottoms, which have been opened up and are still open, of bags, having advancement-roller pairs (2, 3, 19, 20) for a material web and devices for perforating and tearing off or devices for severing the tabs or tube pieces from the material web, and having a takeover folding-tongs cylinder (6) for taking over and subsequently discharging the tabs or tube pieces, characterized in that an intermediate cylinder (7) is arranged between an application folding-tongs cylinder (9) which applies the tabs and/or tube pieces, and the takeover folding cylinder (6), which intermediate cylinder forms a nip with the application folding cylinder (9), into which nip tube pieces or tabs which have been severed or torn off from a second material web (10) along perforation lines run, and which nip discharges the tube pieces or tabs which have been severed or torn off from the first and second material webs, in an at least partially mutually overlapping form onto the running web or the through-running workpieces or bottoms (12).
2. Apparatus according to Claim 1, characterized in that the intermediate cylinder (7) is provided with a row of needles or the like for taking over the tabs or the like from the takeover folding-tongs cylinder (6).
3. Apparatus according to Claim 1 or 2, characterized in that a glue-application roller (8) of a gluing unit is brought up against the intermediate cylinder (7), which glue-application roller provides the tabs or the like with format-specific applications of glue.
4. Apparatus according to Claim 2, characterized in that the intermediate cylinder (7) is provided, upstream of the row of needles in the direction of rotation, with a folding bar or the like which pushes the leading end of the tab or the like, which has been severed or torn off from the second material web (10), into folding tongs of the application folding-tongs cylinder (9).
5. Apparatus according to one of Claims 1 to 4, characterized in that a glue-application roller (11) of a gluing unit is brought up against the application folding-tongs cylinder (9), which glue-application roller provides the tabs or the like, which have been severed or torn off from the second material web (10), with format-specific applications of glue.

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