DE1511640B - Device on a form, fill and seal machine for separating packaging units from a packaging strip - Google Patents

Description

Edges 5 and 6 of the roller 3 cut through the packing tape 7 in cooperation with the roller 4. Around to avoid that, in particular, the cutting edges 5 wear out prematurely due to an excessively high contact pressure are, support disks 9 are arranged on the roller 3 on both end walls, which the same Have a diameter like the circle on which the tips of the cutting edges 5 and 6 lie. This Support disks 9 thereby absorb an excess of contact pressure on the cutting edges 5 and 6 and prevent an excessively high specific surface pressure from occurring at their tips. The cutting edges 5 and 6 but always touch the roller 4 with such a high pressure that the packing tape 7 is separated. Only so long as to be severed Foil of the packing tape 7 between the cutting edges of the roller 3 and the Oferfläche the Roller 4 is located, part of the pressure acting between the two rollers is applied to the cutting edges 5 and 6 transmitted themselves. After the film is separated, the pressure of the roller 4 is proportional taken up again by the support disks 9.

Characterized in that the roller 3 with the cutting edges 5 and 6 with the same cycle or number of revolutions as the upstream form, fill and seal machine is driven and the distance between the tips of the transverse to the running direction of the packing tape 7 extending cutting edges 6 of the roller 3 is larger

ίο than the distance between the packing units 8 im Packing tape 7, the peripheral speed of the tips of the cutting edges 6 is greater than the feed speed of the packing tape 7. As a result, the respective packing unit at the time of Separation from the packaging tape 7 accelerated to the speed of the cutting edges 6, which is a Tear off the packing unit 8 from the packing tape 7 means. In this way one becomes absolute safe separation of the packing units 8 is achieved.

1 sheet of drawings

Claims (2)

1 2 cutting edges have lost their sharpness, always patent claims: safely separated from the strip. This also applies to packaging units that are similar to the example 1. Apparatus on a form, fill, and closing machine by US Pat. No. 2,928,221 For separating package-known devices, consisting of a package strip units from a package strip, which are cut out all around with the same. The more angular Speed is fed, with running cutting edges of the knife roller, a continuously driven knife roller, which connects the cross cutting edges with each other, which has radial cutting edges, and with one that also creates a pulling cut, this cooperating counter roller with smooth io A very long service life of the knife roller and The opposite surface for the cutting edges, because even cuts are special with one characterized in that the distances advantageous embodiment of the invention dader transversely to the circumferential direction of the knife roller achieved by that on both end faces of the knife (3) running cutting edges (6) are larger roller to absorb the contact pressure support collars than which are arranged in the longitudinal direction of the pack strip 15, which are located directly on the counter roller fens (7) extending dimension of a pack and the circumferential surface is in the amount of unit (8) and that the peripheral speed is located at the tips of the cutting edges. The order the cutting edge (5, 6) is larger than the Ge of support bands is in the device according to the speed of the incoming pack strip- U.S. Patent 2,447,258. But since fens (7). 20 the support collars in this known device 2. Apparatus according to claim 1, characterized in that the edge areas of the packing strip on which are supported on both ends of the measuring counter roller, the depth of cut of the water roller (3) for absorbing the contact pressure is dependent on the respective thickness of the packaging material.
Support collars (9) in a manner known per se (4) and their peripheral surface is described in. It shows Height of the tips of the cutting edges (5, 6) be F i g. 1 a separating device in cross section, finds. Fig. 2 shows the separating device according to FIG Longitudinal section and 30 Fig. 3 a packing tape with partially severed Packing units in plan view. A packing tape 7 with sealed-in The invention relates to a device for separating packaging items leaves in a continuous manner nen of packing units from a packing run a form, fill and seal strip (not shown), The machine moves at a constant speed in a vertical direction and arrives at the is performed, with a continuously driven separation of the individual packing units 8 to Knife roller that has radial cutting edges and with a cutting device. This separation device affects with this cooperating counter-roll essentially consists of two in a housing 2 smooth counter surface for the cutting edges. arranged rollers 3 and 4. From both rollers In one, for example, by the USA. Patent 40, only the roller 3 is driven. The roller 4 Font 2 447 258 known device of this type is resiliently pressed against the roller 3. the run the cutting edges of the knife roller with a roller 3 is designed as a format knife in the way, Speed around, which is the same as the addition that recesses are provided on its circumference travel speed of the packing strip. Thereby are, whose straight lines and radii arise together a blunt cut, in which the cutting edges 5 and 6 are found only partly made of tough packaging materials. The cutting edges 5 and 6 are so high that wisely, or, when the knife is no longer sharp, their points on the original outer jacket can no longer be separated smoothly from one another. the roller 3 lie. The parallel to the axis of the roller 3 The invention is based on the object, a running cutting edge 6 have a length that Device of the type mentioned at the outset so that the length of the upper or lower edge of the form that the individual packing units 8 of a packing strip, as seen in the position of FIG The units are fed smoothly and neatly with a high level of the units to the separating device Reliability at high performance can be separated. be, corresponds. The length of the cutting edges 5 This object is achieved according to the invention. However, it exceeds the center-to-center distance between two solved that the distances between the cutting edges running transversely to the circumferential direction 55 on the band 7 successive cutting edges are 8, that is to say that the circle on which the cutting edges are larger than those in the longitudinal direction of the edges 5 and 6 of the roller 3 are greater than the dimension of a length extending the packing strip, which would result if the width of the packing unit and that the circumferential speed of the packing units 8 is greater than the speed 6 by the number of cutting edges of the cutting edges ,
the tapering packing strip. The mode of operation of the shown in the drawing Due to the fact that the grid of the cutting edges is larger than the embodiment example is as follows: is than the length of a packing unit and the A packing tape 7 to be cut is the Cutting edges with greater speed run contact point of the two rollers 3 and 4 in one than the packing strip, despite the blunt 65 way fed that a cutting edge 6 is exactly in Arrangement of the cutting edges to the smooth counterpart in the middle between two packing units 8 to be roll a pulling or tearing cut. As a result comes. The roller 4 is so high of this, the packing units, even if the pressure is pressed on the roller 3, that the cutting