EP0670278B1 - Machine d'emballage du type former, remplir, fermer - Google Patents

Machine d'emballage du type former, remplir, fermer Download PDF

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Publication number
EP0670278B1
EP0670278B1 EP95102624A EP95102624A EP0670278B1 EP 0670278 B1 EP0670278 B1 EP 0670278B1 EP 95102624 A EP95102624 A EP 95102624A EP 95102624 A EP95102624 A EP 95102624A EP 0670278 B1 EP0670278 B1 EP 0670278B1
Authority
EP
European Patent Office
Prior art keywords
strip
path
chamber
wrapping
adjusting
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
EP95102624A
Other languages
German (de)
English (en)
Other versions
EP0670278A1 (fr
Inventor
Mario Spatafora
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.)
Azionaria Costruzioni Macchine Automatiche ACMA SpA
Original Assignee
Azionaria Costruzioni Macchine Automatiche ACMA SpA
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 Azionaria Costruzioni Macchine Automatiche ACMA SpA filed Critical Azionaria Costruzioni Macchine Automatiche ACMA SpA
Publication of EP0670278A1 publication Critical patent/EP0670278A1/fr
Application granted granted Critical
Publication of EP0670278B1 publication Critical patent/EP0670278B1/fr
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
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/24—Advancing webs by looping or like devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
    • B65H23/1888—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling web tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2408/00—Specific machines
    • B65H2408/20—Specific machines for handling web(s)
    • B65H2408/21—Accumulators
    • B65H2408/215—Accumulators supported by vacuum or blown air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/12—Width

Definitions

  • the present invention relates to a so-called continuous form, fill and seal wrapping machine.
  • Wrapping machines of the aforementioned type normally comprise a wrapping beam, the input of which is supplied simultaneously with a continuous strip of wrapping material and a succession of products.
  • the strip is first folded in a U on to and about the products; the lateral edges of the strip are joined beneath the products by a strip traction unit; the continuous tubular wrapping so formed is cut into portions; and the ends of the portions are closed to form a succession of products wrapped individually in so-called "pillow pack" wrappings.
  • the above substantially constant dynamic tension is obtained by using an adjusting unit comprising a brake located along the path of the strip and which provides for reducing the traveling speed of the strip in relation to the speed imparted by the strip traction unit, and so controlling the tension of the strip for ensuring it is properly folded, i.e. with no creases which would result in rejection of the product.
  • the tension of the strip is adjusted working substantially on the stretch and deformation capacity of the material, i.e. by means of a variation in length, and therefore on the basis of the relationship between two diverse quantities: tension and length, which diversity does not allow of accurate tension adjustment. Indeed, even a small adjustment to the brake, and hence a small increase in the length of the strip, may result in a considerable variation in tension.
  • a continuous form, fill and seal wrapping machine comprising a product input device; a product wrapping device for receiving said products in succession and in a continuous manner from said product input device; a continuous output conveyor for receiving wrapped products from said product wrapping device; and a supply line for feeding a continuous strip of wrapping material to, and through, the product wrapping device;
  • the supply line comprising guide means defining a given advancement path for the strip, strip storage means arranged at an input end of said path, a strip traction unit arranged at an output end of said path for extracting said strip from said strip storage means and advancing same along said path, and adjusting means for adjusting the tension of the strip along said path;
  • said adjusting means comprise a chamber; and vacuum means connected to, and for forming an adjustable vacuum inside, the chamber; the chamber presenting an opening defining a portion of said path.
  • Numeral 1 in Figure 1 indicates a so-called “form, fill and seal” wrapping machine for wrapping products 2 inside respective so-called “pillow pack” wrappings 3.
  • Machine 1 comprises a load-bearing frame 5 supporting a known product input device 6, a known product wrapping device 7, and a known output conveyor 8 for receiving the wrapped products 2 from device 7 and feeding them to the output station 9 of machine 1, which also comprises a supply line 10 supported on frame 5 and at least partly over devices 6 and 7, for feeding a continuous strip 11 of wrapping material to the input 12 of, and through, device 7.
  • Input device 6 comprises a known substantially horizontal conveyor 13 for feeding an orderly succession of products 2 to input 12 of device 7 in a direction 14 parallel to conveyor 13.
  • Wrapping device 7 is supplied simultaneously with products 2 and strip 11, and comprises a known wrapping beam 15 located at input 12 and which provides for folding strip 11 in a U on to and about products 2.
  • Device 7 also comprises a known traction unit 16 located downstream from beam 15 and constituting the output element of line 10, and in turn comprising two rollers 17 (only one shown) which provide for pulling and imparting a given tension to strip 11, as well as for joining the lateral edges of strip 11 beneath products 2 to form a continuous tubular wrapping 18.
  • Device 7 also comprises a known closing and cutting unit 19 for receiving wrapping 18 from unit 16, cutting wrapping 18 in known manner into a succession of wrapped products 2, and feeding products 2 to conveyor 8 by which they are fed to station 9 in a direction parallel to direction 14.
  • Line 10 defines, for strip 11, a substantially U-shaped path P comprising an output arm 20 extending in direction 14 and defined by the output portion 21 of conveyor 13 and by wrapping device 7; and an input arm 22 extending, parallel to direction 14 and over arm 20, from a known unwinding device 23 for reels 24 of strip 11.
  • arm 22 is connected to an intermediate arm 26 extending, in direction 27 substantially perpendicular to direction 14, from roller 25 to a guide roller 28 connecting arm 22 to arm 20.
  • Roller 28 is located beneath roller 25 and over conveyor 13, and rotates about an axis 28a parallel to axis 25a.
  • Supply line 10 also comprises an adjusting unit 30 for adjusting the tension of strip 11 when this is subjected to traction by unit 16, and which is located along arm 26, between arms 20 and 22, i.e. inside a space 31 substantially surrounded by path P.
  • unit 30 comprises a casing 32 integral with surface 5a of frame 5 and presenting a tubular body 33 with its axis 34 perpendicular to surface 5a and to direction 27 (Figure 3).
  • Unit 30 also comprises a tubular guide rod 35 extending coaxially with axis 34 and supported by body 33; and a container 36 substantially in the form of a rectangular parallelepipedon and connected in sliding manner to rod 35 via the interposition of a bush 37.
  • Container 36 comprises two lateral walls 38 and 39 perpendicular to axis 34 and parallel to surface 5a, and of which wall 38 is arranged facing surface 5a; and a substantially U-shaped wall 40 located between walls 38 and 39 and presenting two facing portions 41 and 42 ( Figure 3) parallel to each other and perpendicular to surface 5a and direction 27.
  • Container 36 houses a plate 43 extending parallel to and between plates 38 and 39, and movable parallel to itself to define, with walls 39 and 40, a chamber 44 presenting a longitudinal axis 45 perpendicular to axis 34.
  • Chamber 44 is connected to a known suction device 46, the inlet end of which is defined by two tubular bodies 47a and 47b connected telescopically to each other, respectively integral with plate 43 and casing 32, and defining, together with bush 37, a device for guiding container 36 as it is moved parallel to axis 34.
  • Chamber 44 also presents an opening 48 crosswise to axis 45 and surface 5a, and located along a portion of path P.
  • unit 30 comprises two adjusting devices 49 housed parallel to each other inside the space between casing 32 and wall 38, and which provide for adjusting the size of opening 48 in a direction 48a parallel to axis 34 and crosswise to path P.
  • each adjusting device 49 comprises a differential joint 50 defined by a driven screw 51 integral with plate 43; an internally threaded driven bush 52 integral with wall 38 of container 36; and a tubular body 53 presenting an axis 54 perpendicular to surface 5a and coaxial with screw 51 and bush 52.
  • Body 53 presents an internal thread 55 connected for rotation to screw 51, and a first external thread 56 connected for rotation to bush 52, and is rotated about axis 54 by a first chain drive 57 housed in casing 32 and comprising a gear 58 fitted in axially-sliding and angularly-fixed manner to body 53.
  • screw 51 and bush 52 move axially in opposite ways in direction 48a, thus resulting in opposite displacement of plate 43 and wall 38 which takes the rest of container 36, i.e. walls 39 and 40, along with it.
  • Body 53 presents a second external thread 59 located on the opposite side of gear 58 to first thread 56, and connected to the internal thread 60 of a gear 61 which, by means of a second chain drive 62 housed inside casing 32, provides for so moving joint 50, i.e. wall 38 and container 36, as to vary the position of axis 45 in direction 48a.
  • drives 57 and 62 are driven by respective gears 63 and 64 coaxial with axis 34 and fitted to respective drive shafts 65 and 66 extending along tubular body 33 and coaxial with axis 34.
  • strip 11 is pulled and fed by traction unit 16 along supply line 10 and through input 12 of wrapping device 7 simultaneously with products 2, which in turn are fed to input 12 by conveyor 13 of device 6, and are wrapped in strip 11 to form continuous wrapping 18 and subsequently pillow pack wrappings 3.
  • strip 11 is adjusted by means of adjusting unit 30, for which purpose, strip 11, as it runs past opening 48, is sucked into chamber 44 by suction device 46 to form a bend 67 with its concavity facing opening 48.
  • unit 30 By means of suction device 46 connected to chamber 44 by tubular bodies 47a and 47b, an adjustable vacuum is formed inside chamber 44 to adjust the tension of strip 11.
  • unit 30 provides for regulating the tension of strip 11 on the basis of the vacuum inside chamber 44, i.e. on the basis of a quantity related to the tension of strip 11 and therefore allowing of highly accurate tension adjustment.
  • Unit 30 also provides for applying a given tension to strip 11 without necessarily stretching it, thus enabling the use of strips 11 of not only substantially elastic material but also substantially nonelastic material such as paper.
  • a further advantage of unit 30 is that, being formed by a fluidstatic vacuum inside chamber 44, the tension imparted to strip 11 is distributed substantially evenly over the entire width of the strip.
  • Unit 30 also provides for continuously correcting alignment of strip 11 in relation to wrapping beam 15, and so compensating for any misalignment of the machine axes and any defects in the geometry of reel 24 or in the elasticity of the strip material.
  • the above tension and alignment adjustments may be effected using the same unit 30 which, as stated, presents two adjusting devices 49 for adjusting the size of chamber 44 and opening 48 in direction 48a, and so ensuring sliding contact between the lateral edges of strip 11 and wall 39 and plate 43, which sliding contact is required for both aligning the strip and sealing the opening for maintaining a given vacuum inside chamber 44.
  • Devices 49 provide for shifting axis 45 in direction 48a and so moving strip 11 parallel to itself to adjust its alignment in relation to wrapping beam 15.
  • the substantially U shape of path P is particularly advantageous when using strips 11 gummed on one side, by preventing any contact between the gummed surface and the guide rollers in the event strip 11 is mounted with the gummed surface outwards.

Landscapes

  • Containers And Plastic Fillers For Packaging (AREA)
  • Basic Packing Technique (AREA)
  • Vacuum Packaging (AREA)
  • Advancing Webs (AREA)

Claims (4)

  1. Une machine enveloppeuse (1) pour former remplir et sceller en continu comprenant un dispositif d'entrée de produits (6) ; un dispositif d'enveloppement de produit (7) destiné à recevoir lesdits produits (2) les uns à la suite des autres et en continu depuis ledit dispositif d'entrée de produits (6) ; un transporteur de sortie en continu (8) destiné à recevoir les produits enveloppés (2) en provenance dudit dispositif d'enveloppement des produits (7) ; et une ligne d'amenée (10) destinée à amener une bande continue (11) de matériau d'enveloppement au dispositif d'enveloppement des produits (7) et à travers celui-ci ; la ligne d'amenée (10) comprenant des moyens de guidage (25, 28) définissant un chemin d'amenée donné (P) pour la bande (11), des moyens de stockage de bande (23) agencés à une extrémité d'entrée dudit chemin (P), une unité de traction de bande (16) agencée à une extrémité de sortie dudit chemin (P) pour extraire ladite bande (11) desdits moyens de stockage de bande (23) et faire avancer celle-ci le long dudit chemin (P), et des moyens de réglage (30) destinés à régler la tension de la bande (11) le long dudit chemin (P) ; caractérisé en ce que lesdits moyens de réglage (30) comprennent une chambre (44) ; et des moyens de vide (46) reliés à la chambre (44) et destinés à former un vide réglable à l'intérieur de celle-ci ; la chambre (44) présentant une ouverture (48) définissant une partie dudit chemin (P).
  2. Une machine selon la revendication 1, caractérisée en ce que ledit chemin (P) est sensiblement en forme de U, et la chambre (44) est située au niveau de la partie concave (31) du chemin (P).
  3. Une machine selon la revendication 2, caractérisée en ce que la chambre (44) est pourvue d'autres moyens de réglage (50, 57, 58, 63) destinés à régler la dimension de ladite ouverture (48) dans une direction (48a) transversale audit chemin (P).
  4. Une machine selon la revendication 2 ou 3, caractérisée en ce que la chambre (44) est encore pourvue d'autres moyens de réglage (53, 61, 62, 64) destinés à régler la position de ladite ouverture (48) dans une direction (48a) transversale audit chemin (P).
EP95102624A 1994-02-25 1995-02-23 Machine d'emballage du type former, remplir, fermer Expired - Lifetime EP0670278B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO940073 1994-02-25
ITBO940073A IT1273815B (it) 1994-02-25 1994-02-25 Linea di alimentazione di un nastro, particolarmente di materiale di incarto, ad una unita' utilizzatrice

Publications (2)

Publication Number Publication Date
EP0670278A1 EP0670278A1 (fr) 1995-09-06
EP0670278B1 true EP0670278B1 (fr) 1998-11-18

Family

ID=11339531

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95102624A Expired - Lifetime EP0670278B1 (fr) 1994-02-25 1995-02-23 Machine d'emballage du type former, remplir, fermer

Country Status (5)

Country Link
EP (1) EP0670278B1 (fr)
JP (1) JPH0834411A (fr)
DE (1) DE69506014T2 (fr)
ES (1) ES2126166T3 (fr)
IT (1) IT1273815B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1362814A1 (fr) * 2002-05-17 2003-11-19 Agfa-Gevaert AG Dispositif pour stockage intermédiaire de matériau en bande
EP3611099B1 (fr) 2018-08-17 2022-06-29 Volpak, S.A.U. Ligne d'emballage pour produits dans des sacs
DE102022122947A1 (de) 2022-09-09 2024-03-14 Khs Gmbh Ansaugvorrichtung für eine Etikettiermaschine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2710154A (en) * 1954-06-24 1955-06-07 Research Corp Web tension control system
US2796223A (en) * 1954-07-22 1957-06-18 Abraham L Detweiler Web tensioner
US3973493A (en) * 1974-11-01 1976-08-10 James A. Black Web stencilling and drying apparatus
US4299458A (en) * 1980-06-02 1981-11-10 Autologic, Inc. Self threading phototypesetter transport system
CH667260A5 (de) * 1984-10-04 1988-09-30 Grapha Holding Ag Transportstrecke fuer das intermittierende vorbeifuehren einer papierbahn oder dgl.
IT8522272V0 (it) * 1985-06-26 1985-06-26 Sitma Dispositivo di controllo dello svolgimento di una pellicola plastica in una macchina confezionatrice.
JP2903496B2 (ja) * 1990-11-19 1999-06-07 株式会社東京自働機械製作所 ウェブ供給装置
US5079569A (en) * 1991-02-25 1992-01-07 B. Bunch Company, Inc. Laser printer with paper positioning and tensioning features

Also Published As

Publication number Publication date
ITBO940073A1 (it) 1995-08-25
ITBO940073A0 (it) 1994-02-25
ES2126166T3 (es) 1999-03-16
JPH0834411A (ja) 1996-02-06
IT1273815B (it) 1997-07-10
DE69506014T2 (de) 1999-06-10
DE69506014D1 (de) 1998-12-24
EP0670278A1 (fr) 1995-09-06

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