EP0591101A1 - Verfahren und Vorrichtung zum Vorbereiten von einer Folie aus flexibelem Material zur Verpackung eines Paketes, insbesondere eines Paketes für Tabakindustriewaren - Google Patents

Verfahren und Vorrichtung zum Vorbereiten von einer Folie aus flexibelem Material zur Verpackung eines Paketes, insbesondere eines Paketes für Tabakindustriewaren Download PDF

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Publication number
EP0591101A1
EP0591101A1 EP93810644A EP93810644A EP0591101A1 EP 0591101 A1 EP0591101 A1 EP 0591101A1 EP 93810644 A EP93810644 A EP 93810644A EP 93810644 A EP93810644 A EP 93810644A EP 0591101 A1 EP0591101 A1 EP 0591101A1
Authority
EP
European Patent Office
Prior art keywords
sheet
strip
precut
movement
package
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93810644A
Other languages
English (en)
French (fr)
Other versions
EP0591101B1 (de
Inventor
Albert Sigrist
Roberto Rizzolo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philip Morris Products SA
Original Assignee
Fabriques de Tabac Reunies SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from EP92810739A external-priority patent/EP0590217A1/de
Application filed by Fabriques de Tabac Reunies SA filed Critical Fabriques de Tabac Reunies SA
Priority to EP19930810644 priority Critical patent/EP0591101B1/de
Publication of EP0591101A1 publication Critical patent/EP0591101A1/de
Application granted granted Critical
Publication of EP0591101B1 publication Critical patent/EP0591101B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/002—Precutting and tensioning or breaking

Definitions

  • the present invention relates to a process for preparing a sheet of flexible material, such as a polypropylene or cellophane sheet, intended for packaging a package, said sheet being cut from a strip animated by a movement of longitudinal displacement, the appropriate device using this method and a packaging machine equipped with such a device.
  • the invention applies particularly, but not exclusively, to the packaging of packets of tobacco industry products such as cigarettes, cigars or cigarillos.
  • preparation of a packaging sheet is meant cutting it to the necessary dimensions as well as presenting it on the package it is to package, this by automatic processes.
  • European application EP-A-0.187.323 shows a device on which several packaging sheets placed side by side are cut simultaneously from a strip. After partial cutting of the cutting lines transverse to the movement of the strip, the precut sheets pass through rollers rotating at a peripheral speed slightly greater than the speed of advance of the strip, which detaches the precut sheets from said strip.
  • This device is particularly suitable for sheets of a non-elastic material such as paper or thin cardboard, but is not suitable for stretchable materials such as polypropylene. or the cellophane in question here since the detached sheets are no longer guided with precision.
  • US-A-4,151,699 describes a device by which the packaging sheet is cut in two stages, firstly a cutting of the two portions close to the edge of the strip, followed by cutting of its part central.
  • This device requires a complex synchronization of the two knives so that the two cuts are connected; proof of the difficulty of this operation is provided by the fact that small longitudinal cuts are necessary at the points of connection of the cuts.
  • Patent US-A-4,388,794 is an improvement on the previous one; in this case the lateral edges of the sheet to be cut are entrained by two endless belts, the running speed of said belts being slightly higher than that of the strip and the two belts moving slightly apart from one another to stretch the cut sheet. Since the cuts are made in the same manner as above, the drawbacks mentioned remain.
  • Patent EP-B-0.109.582 shows a device on which the sheet to be cut is driven successively by two side bands, then by a roller where it is cut, before ironing on two side bands, thereby following a fairly path complicated.
  • a first object of the invention is therefore to propose a process for preparing a packaging sheet by which the drawbacks mentioned above are avoided; this first object being obtained by a process, certain steps of which are described in claims 1 and 2.
  • Another object of the invention is to propose an adequate device making it possible to carry out the above method, capable of operating at high speed without the risk of jamming and the synchronization of the various functions of which is simplified. This object is obtained by a device as described in claims 3 to 10.
  • Yet another object of the invention is to provide a packaging machine, which can be equipped with the device, as described above, originally or later, this packaging machine being in accordance with claim 11.
  • each package 20 must be covered with a protective sheet 30.
  • These protective sheets 30, generally made of polypropylene or cellophane, are cut from a continuous strip 3, unwound from a reel (not shown), said strip 3 being guided by one or more guide rollers 10 and driven at constant linear speed by one or more drive rollers 11 to be presented, preferably vertically in a movement from top to bottom, directly above the device cutting.
  • This is firstly composed of drive means 4 for the strip 3 and, after the latter has been precut in the manner described below, of a precut sheet 31, which preferably consist of two endless belts 40, arranged in a spaced parallel manner, the space between the two belts being slightly greater than the width of a bundle, a strand of each of them moving linearly parallel and at a very short distance from a part of the path of the strip 3, the lateral edges of the strip 3, respectively of the precut sheet 31 superimposed on said strands.
  • a precut sheet 31 which preferably consist of two endless belts 40, arranged in a spaced parallel manner, the space between the two belts being slightly greater than the width of a bundle, a strand of each of them moving linearly parallel and at a very short distance from a part of the path of the strip 3, the lateral edges of the strip 3, respectively of the precut sheet 31 superimposed on said strands.
  • Both belts 40 each circulate around at least two deflection rollers 41,42, one deflection roller at least of each of the two belts, for example the rollers 41, being driven in rotation by drive means 43, such that the linear speed of the strand of the belts 40 being circulated parallel to the strip 3 is very slightly greater than the constant linear speed imposed by the drive roller (s) 11, for reasons which will be explained later.
  • Each of the belts 40 is provided with a plurality of orifices 44 (see FIG. 2) connecting a vacuum chamber 45, one outlet of which is connected to a suction installation, not shown.
  • the notched part of the belts 40 comprises a longitudinal guide groove 40B (see FIG. 2) which corresponds to a rib longitudinal arranged on the bearing face of the vacuum chamber 45. In this way, the longitudinal speed guide as well as the lateral guide in position of the strip 3 as well as of the precut sheet 31 are perfectly ensured.
  • the device then comprises cutting means 5, preferably composed of a cutting blade 50 mounted on a pivoting cylinder 51 and a fixed counter blade 52, mounted exactly opposite the cutting position of the blade 50, of the 'other side of the strip 3.
  • the cutting means 5 are installed on a portion of rectilinear path of the strip 3, between the last drive rollers 11 and the top of the belts 40.
  • the cutting blade 50 of the device according to the The invention is particular in that, as seen in FIG. 3, its cutting edge is not continuous but has a plurality of notches 50A.
  • the pivoting cylinder 51 is rotated by drive means 53, synchronized so that the cut 32 (see Figure 2) takes place at the appropriate place on the strip 3 so as to pre-cut sheets 31 of length determined taking into account the slight longitudinal stretching mentioned above.
  • FIG. 2 The action of the blade 50 on the strip 3 is also visible in FIG. 2 where it can be seen that the cutout 32 is not continuous but has attachment points 32A corresponding to each of the notches 50A.
  • the precut sheet 31 is not immediately completely separated from the strip 3, but remains attached to the latter by the attachment points 32A.
  • the slight longitudinal traction due to the difference in speed of movement between the strip 3 and the precut sheet 31 also requires a slight stretching of the attachment points 32A.
  • the number of attachment points 32A as well as their width are determined taking into account the thickness of the tape 3, its mechanical strength, etc., so that the attachment points 32A do not break under the effect of the stretch mentioned above, but are very close to their breaking limit.
  • the strip 3 can also comprise a continuous tear tape placed longitudinally on the said strip, the cutting blade 50 leaving an uncut space on either side of the said tape, which a second cutting blade subsequently cuts in a slightly offset position. compared to the first cut.
  • This portion of the device for including a tear tape from the packaging is well known in the art, it is therefore not shown in the figures but can easily be integrated into the device according to the invention.
  • a tear blade 54 strikes the precut sheet 31 on an area 33 in an approximately tangential movement in the direction of movement of the precut sheet 31.
  • the cutting blade stripping 54 is arranged on one side of a lower portion of the precut sheet 31, opposite which, on the other side of the precut sheet 31 and in contact with it by a generator, there is a surface d 'support, preferably one or more support rollers 55 in free rotation about an axis parallel to the plane of the precut sheet 31 but perpendicular to its direction of movement.
  • the tear blade 54 has the general shape of a rectangular parallelepiped, its face 54A which strikes the precut sheet 31 being convex.
  • the blade 54 pivots about an axis parallel to that of the support roller (s) 55, it is driven in rotation around this axis by drive means 56 comprising movement acceleration means 56A such as for example a box comprising elliptical gears, in such a way that an acceleration of the rotation movement of the blade 54 is applied to it just before the face 54A of the said blade strikes the zone 33 of the precut sheet 31, the roll or rolls support 55 having the role of a counter-support.
  • the precut sheet 31, which has just been precut by the cutting blade 50 receives a shock in the direction of its movement, which is enough to tear off the attachment points 32A which kept it still attached to the 'lower end of the strip 3, and which were close to their breaking limit.
  • the sheet 34 is therefore now entirely separated from the strip 3, it is driven by the belts 40 and moves at their speed, being perfectly maintained by suction and guided by them. Given the different speeds of movement, a space has therefore been created between the lower edge of the ribbon 3 and the upper edge of the cut sheet 34, these two edges can no longer come into contact and / or overlap, thus avoiding the risk of cause the machine to jam.
  • the rotation drive means 53 of the cutting blade 50 as well as the rotation drive means 56 of the tearing blade 54 are synchronized with one another and with the drive means in rotation 43 of the belts 40 by a synchronization device 57 of known technique.
  • the synchronization device 57 can be of relatively simple design since it it is not necessary for the tear blade 54 to strike the precut sheet in a very precise location, the zone 33 being located near and below the cutout 32 which has just been made. During this typing, the lower end of the strip 3 which immediately follows the precut sheet 31 to be torn off is already engaged and driven by the belts 40. Since it is sought to obtain a device of dimensions as small as possible, the tear blade 54 will be placed at a relatively short distance from the top of the belts 40 and the rollers 42 respectively.
  • Figure 1 seems to show that it is possible to have a precut sheet 31 and a cut sheet 34 arranged one after the other simultaneously on the belts 40. In fact, and if the device is of reduced dimensions as has just been said, we could not have such a provision; the pins 31 and 34 in Figure 1 are only used to mount approximately the positions taken by the sheets 31 or 34 on the device. If the device is longer than shown, in particular if the belts 40 are longer, it would then be possible to have several sheets 31 and / or 34 transported simultaneously by the drive means 4.
  • a pack of cigarettes 20, ready to be packaged, is waiting on a slide 12A arranged perpendicular to the movement of the cut sheet 34, on one side of the device, for example below the support rollers 55.
  • the width of the slide 12A is slightly less than the space between the two belts 40 (see FIG. 2), and its front end comes just flush with the plane on which the cut sheet 34 moves.
  • the synchronization device 57 controls the lever or the piston 13, by means of actuation means 14, so that the packet 20 is propelled towards the sheet cut 34 and continuing to slide on the slide 12B, drives said sheet until it goes to be housed in a housing 15 arranged in a receiving wheel 16 of known technique.
  • the receiving wheel 16 continues its sequential rotational movement as indicated by the arrow, the upper portions of the packaging sheet 30 will be folded down and sealed on the package in order to completely close it to make it waterproof, by a technical device. known.
  • the knife 50 carrying out the precut 32 it is not absolutely necessary for the knife 50 carrying out the precut 32 to be driven by a rotary movement; a similar result can be obtained with a knife making a movement perpendicular to that of the strip 3.
  • the counter blade 52 does not absolutely have to be fixed, it can also be a bearing surface or a 'A roller, which can also optionally be provided with notches corresponding to the notches 52A of the cutting blade.
  • the acceleration of the tear blade 54 can also be caused by other means than those described, for example by a cam or by a piston.
  • the method and the device described meet the set goals, that is to allow the presentation of packaging sheets without risk of jamming and at high rate of operation.
  • a device as described can be originally mounted on a packaging machine or can be later mounted to improve it.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wrapping Of Specific Fragile Articles (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
EP19930810644 1992-10-01 1993-09-10 Verfahren und Vorrichtung zum Vorbereiten von einer Folie aus flexibelem Material zur Verpackung eines Paketes, insbesondere eines Paketes für Tabakindustriewaren Expired - Lifetime EP0591101B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19930810644 EP0591101B1 (de) 1992-10-01 1993-09-10 Verfahren und Vorrichtung zum Vorbereiten von einer Folie aus flexibelem Material zur Verpackung eines Paketes, insbesondere eines Paketes für Tabakindustriewaren

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP92810739A EP0590217A1 (de) 1992-10-01 1992-10-01 Verfahren und Vorrichtung zum Vorbereiten von einer Folie aus flexiblem Material zur Verpackung eines Paketes, insbesondere eines Paketes für Tabakindustriewaren
EP92810739 1992-10-01
EP19930810644 EP0591101B1 (de) 1992-10-01 1993-09-10 Verfahren und Vorrichtung zum Vorbereiten von einer Folie aus flexibelem Material zur Verpackung eines Paketes, insbesondere eines Paketes für Tabakindustriewaren

Publications (2)

Publication Number Publication Date
EP0591101A1 true EP0591101A1 (de) 1994-04-06
EP0591101B1 EP0591101B1 (de) 1995-12-20

Family

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EP19930810644 Expired - Lifetime EP0591101B1 (de) 1992-10-01 1993-09-10 Verfahren und Vorrichtung zum Vorbereiten von einer Folie aus flexibelem Material zur Verpackung eines Paketes, insbesondere eines Paketes für Tabakindustriewaren

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EP (1) EP0591101B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6046261A (en) * 1997-08-11 2000-04-04 Sumitomo Chemical Company, Limited Piperidine compound

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE431290C (de) * 1923-07-07 1926-07-06 Johannes Bergmann Knobel Abreissvorrichtung fuer Cellulose- und andere Bahnen
US1772785A (en) * 1925-10-26 1930-08-12 Hoague Sprague Corp Art of working cardboard and similar material
US4388794A (en) * 1975-07-11 1983-06-21 Focke & Pfuhl Apparatus for cutting and transporting blanks from a web of flexible material
EP0187323A1 (de) * 1985-01-10 1986-07-16 Focke & Co. (GmbH & Co.) Verfahren und Vorrichtung zum Herstellen von Zuschnitten für Verpackungen
US5076555A (en) * 1990-07-25 1991-12-31 Bunch Jr Earnest B Apparatus for partially severing strip of paper along lines offset from lines of weakening in the paper

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE431290C (de) * 1923-07-07 1926-07-06 Johannes Bergmann Knobel Abreissvorrichtung fuer Cellulose- und andere Bahnen
US1772785A (en) * 1925-10-26 1930-08-12 Hoague Sprague Corp Art of working cardboard and similar material
US4388794A (en) * 1975-07-11 1983-06-21 Focke & Pfuhl Apparatus for cutting and transporting blanks from a web of flexible material
EP0187323A1 (de) * 1985-01-10 1986-07-16 Focke & Co. (GmbH & Co.) Verfahren und Vorrichtung zum Herstellen von Zuschnitten für Verpackungen
US5076555A (en) * 1990-07-25 1991-12-31 Bunch Jr Earnest B Apparatus for partially severing strip of paper along lines offset from lines of weakening in the paper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6046261A (en) * 1997-08-11 2000-04-04 Sumitomo Chemical Company, Limited Piperidine compound

Also Published As

Publication number Publication date
EP0591101B1 (de) 1995-12-20

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