EP0802116B1 - A method for forming twist wrappers and the respective equipment - Google Patents

A method for forming twist wrappers and the respective equipment Download PDF

Info

Publication number
EP0802116B1
EP0802116B1 EP97105913A EP97105913A EP0802116B1 EP 0802116 B1 EP0802116 B1 EP 0802116B1 EP 97105913 A EP97105913 A EP 97105913A EP 97105913 A EP97105913 A EP 97105913A EP 0802116 B1 EP0802116 B1 EP 0802116B1
Authority
EP
European Patent Office
Prior art keywords
notch
semi
wrapper
recess
rotary body
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.)
Expired - Lifetime
Application number
EP97105913A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0802116A1 (en
Inventor
Tomaso Damonte
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.)
Ferrero OHG
Ferrero SpA
Soremartec SA
Original Assignee
Ferrero OHG
Ferrero SpA
Soremartec 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
Application filed by Ferrero OHG, Ferrero SpA, Soremartec SA filed Critical Ferrero OHG
Publication of EP0802116A1 publication Critical patent/EP0802116A1/en
Application granted granted Critical
Publication of EP0802116B1 publication Critical patent/EP0802116B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags

Definitions

  • the present invention relates to a method for forming twist wrappers and equipment for carrying out the method.
  • Wrappers definable as twist wrappers are usually used in the food industry, and particularly in the confectionery sector, for packaging products such as boiled sweets, comfits, pastilles, etc.
  • a semi-finished wrapper is first formed comprising a hollow or tubular-shaped wrapper sheet (possibly in several layers) in which the product is inserted. After the insertion of the product, the semi-finished wrapper is twisted adjacent the or each open end which results in the formation of the respective twisted projecting end portion.
  • each twisted end is formed with the "body" of the semi-finished wrapper (that is, the part in which the product is located) held stationary while the end portion or portions projecting therefrom are acted upon by a twisting member, typically a rotary gripper.
  • a twisting member typically a rotary gripper.
  • the object of the present invention is to provide a solution which overcomes the intrinsic difficulties linked with the use of prior-art solutions, particularly in relation to the following factors:
  • a further subject of the invention is equipment for carrying out this method.
  • the description which follows relates specifically to an element or module of equipment for forming a twist wrapper (in this specific case a double-twist wrapper) around one product at a time.
  • the module may be reproduced on a large scale, for example in the form of a matrix structure (each including m rows of n modules of the type illustrated in the appended drawings), it is possible to form equipment which is able to act simultaneously on m by n products, where m x n is a very large number (even of the order of hundreds). It is thus possible to form equipment which is able to achieve productivity levels of the order of thousands (in some cases tens of thousands) of wrapped products every minute.
  • reference 1 generally indicates equipment usable to package products (typically sweet products such as boiled sweets and pastilles) in a twist wrapper.
  • products typically sweet products such as boiled sweets and pastilles
  • P double-twist wrapper of the type generally indicated P in Figure 10.
  • the wrapper in question is made from sheet material (of paper, laminated plastics, aluminium etc), possibly with several layers.
  • the wrapper in question is first wrapped around the pre-made product (here shown in the form of a disc-shaped pastille K) so as to form a channel-shaped, semi-finished wrapper and then it is twisted adjacent its ends to form two twisted, projecting end portions indicated F.
  • the core of the equipment 1 is constituted by a support 2, for example of metal, having an opening or cavity 3 in which a gear wheel 4 is mounted for rotation (in this embodiment about a horizontal axis), the gear having a radial slit or notch 5.
  • the notch 5 may be seen as corresponding to a sort of slot created in the body of the gear 4 so as to create a recess which extends from a central portion of the gear 4 to open into its periphery which is toothed (partially or completely).
  • the notch in question is generally straight which, although preferred, should not be understood as imperative.
  • the peripheral teeth of the gear 4 which cooperate, according to criteria which will be more fully explained below, with a rack or toothing 6 illustrated here as generally beneath the support 2, the support 2 being able to move relative to the rack 6.
  • the meshing of the gear 4 with the rack 6 is intended to make the translational movement of the support 2 along the rack 6 cause the gear 4 itself to rotate about its central axis.
  • the illustration shows the solution which is currently preferred in terms of reliability and simplicity, the same practical result (rotation of the gear 4) could be achieved in a different manner, for example by a drive associated with the gear 4.
  • the gear need not necessarily be toothed and, in general, the gear could be replaced by any body capable of achieving the rotation of the notch 5, it thus not being essential to make use of a gear as such.
  • Reference 7 indicates (see in particular Figure 2) a sort of die intended to be superposed on the support 2 so as to locate a slot 8 for use in the formation of the semi-finished wrapper and in the insertion of the product K in the semi-finished wrapper over the cavity 3 in which the gear 4 is located.
  • the support 2 also has a further notch 9 in a position generally aligned with the slot 8 when the die 7 is applied to the support 2, this further notch being coextensive with the notch 5 in the gear 4 in the position of formation of the semi-finished wrapper and introduction of the product (in practice in the position illustrated in Figure 1).
  • a similar notch, indicated 10 and only partly visible in Figure 1, is provided in the other wall of the support 2 which defines the cavity 3 and is also aligned with the notch 5 and the notch 9.
  • Figure 3 illustrates an assembly for supplying sheet material G, for forming the twist wrapper which it is desired to make, located above the die 7 and, specifically, above the slot 8 (shown in broken outline in Figure 3).
  • the assembly in question includes winding and unwinding reels (not illustrated, the structure being widely known in general) which carry the strip of sheet material G so that it passes over two drive rollers or rods 11.
  • the rods or rollers 11 are brought close to the upper, flat face of the die 7 in correspondence with the slot 8.
  • Reference 12 indicates a punch assembly comprising:
  • Figure 5 shows the result achieved by the lowering of the assembly 12 within the complex constituted by the support 2 and the die 7.
  • the slot 15 is located exactly in line beneath the slot 8.
  • the two slots in question usually have approximately corresponding dimensions, the slot 15 preferably being slightly larger and/or having a slight flair so as to provide a "lead-in" to the punch 14 when it is lowered.
  • the product K subsequently introduced (by known means) into the duct 16 falls vertically within the punch 14 so as to be deposited in the bottom loop of the semi-finished wrapper S in the notch 5 in the gear 4.
  • the sheet-supply assembly (comprising the elements 11 and the strip G of sheet material from which the portion T forming the semi-finished wrapper S has been removed), as well as the inserter assembly (comprising the elements 13 and 16) are moved away from the support 2.
  • the two assemblies in question are usually made in the form of vertically-movable assemblies which are able to descend to engage the support 2 and the die 7.
  • the complex formed by the support 2 and the die 7 (and rack 6 which - for reasons which will become clear below - must be held in a fixed position relative to the elements 2 and 7 initially) may be movable so as to allow its disengagement from the assemblies indicated above.
  • the desired result is as follows: the support 2 containing (within the cavity 3) the gear 4 with the notch 5 within which is the semi-finished wrapper S and the product K is accessible from the open side of the semi-finished wrapper once the die 7 has been removed from the support 2.
  • the die 7 itself serves both as a guide element for the sheet-supply assembly and the inserter assembly and as a stabilising element for cooperating with the support 2 during the formation of the semi-finished wrapper S.
  • a new supply assembly is brought close to the support 2 so that it can cooperate with the semi-finished wrapper S.
  • the assembly 17 is intended to cooperate with the end portions of the semi-finished wrapper S which project laterally (at both ends in the example illustrated which shows the formation of a double-twist wrapper) from the body of the semi-finished wrapper S containing the product K and, hence, from the outer faces of the walls of the support 2 defining the cavity 3.
  • the assembly 17 is composed essentially of a pair of retaining or gripping elements 18 shown here in the form of jaws. Once the assembly 17 has been lowered so as to bring the jaws 18 to the height of the projecting ends of the semi-finished wrapper S, the jaws themselves, here shown with the clamping zone oriented vertically, may be closed so as to grip the ends of the semi-finished wrapper S between them, these ends also extending vertically.
  • the gripper elements here shown in the form of the jaws 18 are intended to hold the ends of the semi-finished wrapper S during the formation of the wrapper twists.
  • the gripping action must at the same time be firm and not too vigorous: on the one hand it must prevent the ends of the semi-finished wrapper S escaping the gripping action but it is also true that this same gripping action must not oppose the formation of the twists by the twisting of the semi-finished wrapper S about its longitudinal axis.
  • the jaws 18 must be able to allow the sheet material constituting the end portions of the semi-finished wrapper S to slide between them to a certain extent during the formation of the twisted ends.
  • the degree and intensity of the gripping action must thus be determined selectively and in dependence on specific applicational requirements, taking into account firstly parameters such as the dimensions of the wrapper (and hence of the twisted ends) and the characteristics of the sheet material constituting the wrapper itself (thickness, degree of deformability, maximum breaking stress, slip, etc).
  • the result is the movement of the rack 6 relative to the support 2 and the consequent rotation of the gear 4 (the outer teeth of which mesh with the rack 6) about its axis within the its housing cavity 3 in the support 2.
  • the rotation imparted to the gear 4 results in a corresponding rotation of the notch 5 in which the central portion, or body, of the semi-finished wrapper S containing the product K is located while the ends of the semi-finished wrapper S are held stationary by the jaws 18 of the assembly 17 so as not to be able to rotate.
  • the overall result is that the body of the semi-finished wrapper S rotates relative to the ends and consequently the two twisted end portions, or twists F shown in Figure 10 are formed.
  • the solution according to the invention is thus aimed in a different direction from the prior art solutions in which the twisting of the semi-finished wrapper S required to form the twist or twists F is achieved by the rotation of the end or ends of the semi-finished wrapper relative to the body of the semi-finished wrapper.
  • the or each end is held stationary (in the embodiment illustrated, by the jaws 18) while the body is rotated (in the example illustrated by the gear 4).
  • the invention thus enables the equipment used for the formation of the twists to be simplified considerably in that the gripper elements 18 need not to rotate which considerably simplifies the structure.
  • the part which houses the body of the semi-finished wrapper that is rotated this, in the example illustrated, being the same part in which the semi-finished wrapper has previously been formed and in which the product K has been inserted (preferably, as in the example illustrated, by being dropped) into the semi-finished wrapper itself.
  • the solution of the invention enables the structure of the semi-finished wrapper to be simplified, with the use of a simple channel shape (see in particular Figures 5 and 6) without the need to close the semi-finished wrapper itself into a tube around the product K: this latter operation, in various prior art solutions, involves the use of further shaping and/or temporary retaining elements for shaping the semi-finished wrapper tube and/or holding the semi-finished wrapper closed during the formation of the twists.
  • the assembly 17 is raised so as to remove it from the support 2 (again in this case, the same result could be achieved by the lowering of the support 2 and associated members relative to the assembly 17) with the jaws 18 kept closed so as to retain the wrapper P, now completely formed with the twists F, between them and to remove it from the notch 5 and hence from the support 2.
  • the assembly 17 may be used for example to transfer the completed wrapper P to a further work-station (for example a machine for inserting it in a box or bag) where the completed wrappers are freed by the opening of the jaws 18 so as to release the twisted ends F.
  • the situation illustrated is not a limitation in that, in most cases, it corresponds to the need to rotate the gear 4 through 360° by means of the relative movement of the rack 6 and the support 2. Even if the material of the wrapper has a certain resilience so that it tends to return to its undeformed condition after the formation of the twists, this angle of rotation suffices, without any other means, to create twists which remain firmly closed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Brushes (AREA)
  • Packages (AREA)
  • Wire Processing (AREA)
EP97105913A 1996-04-15 1997-04-10 A method for forming twist wrappers and the respective equipment Expired - Lifetime EP0802116B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH95196 1996-04-15
CH00951/96A CH691372A5 (it) 1996-04-15 1996-04-15 Procedimento per formare involucri a fiocco e relativo dispositivo.
CH951/96 1996-04-15

Publications (2)

Publication Number Publication Date
EP0802116A1 EP0802116A1 (en) 1997-10-22
EP0802116B1 true EP0802116B1 (en) 2004-06-23

Family

ID=4198973

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97105913A Expired - Lifetime EP0802116B1 (en) 1996-04-15 1997-04-10 A method for forming twist wrappers and the respective equipment

Country Status (5)

Country Link
EP (1) EP0802116B1 (it)
AT (1) ATE269809T1 (it)
CH (1) CH691372A5 (it)
DE (1) DE69729601T2 (it)
ES (1) ES2218614T3 (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20060295A1 (it) 2006-04-20 2007-10-21 Soremartec Sa Dispositivo per realizzare incarti di prodotti alimentari relativo procedimento ed impianto

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2346613A (en) * 1941-03-14 1944-04-11 Jr Herbert Rumsey Wrapping machine
US2598073A (en) * 1950-01-25 1952-05-27 Jr Herbert Rumsey Wrapping and twisting apparatus
DE2552600A1 (de) * 1975-11-24 1977-06-02 Ernst Kurt Poepel Dreheinschlag fuer bonbons oder in dieser form aehnlich zu verpackende ware
GB2043021A (en) * 1979-03-02 1980-10-01 Tex Del Inc Method of and apparatus for wrapping cylindrical articles

Also Published As

Publication number Publication date
ATE269809T1 (de) 2004-07-15
EP0802116A1 (en) 1997-10-22
CH691372A5 (it) 2001-07-13
DE69729601T2 (de) 2005-06-30
ES2218614T3 (es) 2004-11-16
DE69729601D1 (de) 2004-07-29

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