EP1375365A1 - Sachet d'emballage, procédé et dispositif pour sa fabrication - Google Patents

Sachet d'emballage, procédé et dispositif pour sa fabrication Download PDF

Info

Publication number
EP1375365A1
EP1375365A1 EP02254428A EP02254428A EP1375365A1 EP 1375365 A1 EP1375365 A1 EP 1375365A1 EP 02254428 A EP02254428 A EP 02254428A EP 02254428 A EP02254428 A EP 02254428A EP 1375365 A1 EP1375365 A1 EP 1375365A1
Authority
EP
European Patent Office
Prior art keywords
bag
tubular film
ply
film material
edge
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.)
Withdrawn
Application number
EP02254428A
Other languages
German (de)
English (en)
Inventor
Francesco Robbiati
Antonio M. Montalbano
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.)
Cryovac LLC
Original Assignee
Cryovac LLC
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 Cryovac LLC filed Critical Cryovac LLC
Priority to EP02254428A priority Critical patent/EP1375365A1/fr
Priority to EP03011985A priority patent/EP1375366A1/fr
Priority to US10/603,028 priority patent/US20040001652A1/en
Priority to NZ526659A priority patent/NZ526659A/en
Priority to AU2003204934A priority patent/AU2003204934A1/en
Priority to CA002433207A priority patent/CA2433207A1/fr
Publication of EP1375365A1 publication Critical patent/EP1375365A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/06—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it
    • B65B9/08—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it in a web folded and sealed transversely to form pockets which are subsequently filled and then closed by sealing
    • B65B9/093—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it in a web folded and sealed transversely to form pockets which are subsequently filled and then closed by sealing the web having intermittent motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • 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
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/02—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for perforating, scoring, slitting, or applying code or date marks on material prior to packaging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/007—Details of, or accessories for, sacks or bags for facilitating the separation of the two walls, e.g. walls of inequal height, tabs; for maintaining the mouth of the sack or bag open
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/002—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers in shrink films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5827—Tear-lines provided in a wall portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/003—Flexible containers made from webs starting from tubular webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B70/16—Cutting webs
    • B31B70/18—Cutting webs longitudinally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/642—Uniting opposed surfaces or edges; Taping by applying heat or pressure using sealing jaws or sealing dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings

Definitions

  • the present invention relates to a packaging bag, particularly a transverse- or side-sealed bag of plastics film.
  • a further object of the present invention is to provide a method of producing packaging bags which are resistant to the curling problem of the prior art.
  • Yet a further object of the present invention is to provide an apparatus for producing packaging bags which are resistant to this curling problem.
  • a packaging bag comprising opposed first and second film plies joined at a closed end of the bag and sealed along lateral edges of the bag, said plies defining an open mouth end having a first edge of the first ply and a second edge of the second ply projecting beyond the first edge of the first ply, characterised in that the second edge comprises a folded over film portion to exhibit double thickness at the exposed end of the second ply.
  • the turned over lip may define the mouth edge of a longer side of the bag which thus projects beyond the edge of the shorter opposite side of the bag.
  • the turned over lip also therefore presents a rigidifying effect, which is particularly helpful in the case of packaging bags with a thickness at the smaller end of the available range of materials to be used, i.e. a lighter weight of film than is normal.
  • a further aspect of the present invention provides apparatus for manufacturing a bag according to the first aspect, comprising means for feeding a flat folded tubular film material having first and second marginal folds along a film path, means for transversely sealing said tubular film at regularly spaced locations to define the joins between adjacent transverse-sealed bags formed from said tubular film material, means for taking up said succession of transverse sealed bags from said transverse sealing station, and means for slitting one flat wall of said flat-folded tubular film material adjacent said first fold of said film material to define said second mouth edge extending beyond said first mouth edge, said slitting means being mounted upstream of said transverse sealing station.
  • a third aspect of the present invention provides a method of manufacturing a bag according to the first aspect, comprising feeding a flat-folded tubular film material along a machine direction while exhibiting first and second superposed plies extending between first and second marginal folds of said tubular film material, slitting said first ply adjacent said first marginal fold of said flat-folded tubular film material while leaving said second ply unslit whereby said second ply has a turned over edge at said first marginal fold of the tubular film material, downstream of said slitting station transversely sealing said tubular film material along a plurality of regularly spaced transverse seal lines which extend into said second ply at said turned over edge adjacent the first marginal fold of the tubular film material, and delivering the plurality of transverse-sealed packaging bags thus formed.
  • a fourth aspect of the invention provides a method of packaging, comprising taking a bag according to the first aspect, or a bag made by the method of the third aspect, and pneumatically inflating the mouth of said bag to separate the edge of said shorter first ply from said projecting edge of the second ply to initiate opening of the bag, and subsequently holding the bag open and introducing a product article into a respective said open bag.
  • the improved packaging bag shown in Fig. 1 is a side-sealed bag 1 having a closed end 1a at which are joined together first and second superposed main panels 2 and 3 which are sealed along opposite edges 4 and 5 by a heat-sealing operation.
  • the closed end 1a is a first fold in the film material providing the two plies defining the panels 2 and 3.
  • the mouth of the bag is at the end opposite the closed end 1a and is formed by a folded portion 7 of the second main panel 3 and a cut edge 6 of the first main panel 2.
  • the manufacture of the mouth end involves using the second of the two folds of the flat folded film (12 in Figs. 3 and 4) of the plastic material used for the bag, the first fold being to define the closed end 1a, described above, of the bag.
  • the production of the mouth end involves forming a cut at 7a in one of the two flat plies of the flat-folded tubular film adjacent to the second fold 7 referred to above, in order to separate the first main ply from the co-planar folded over part of the film margin at the fold 7.
  • the folded end of the main ply exhibits a double thickness of the film in one wall which projects beyond the end 6 of the main ply (other wall), thereby (i) allowing easier pneumatic inflation of the bag mouth in order to open the bag 1 for loading purposes, and (ii) resisting wrinkling in that the increase in thickness of the end of the panel 3 at the folded end of the second ply helps to resist the tendency which the bag material would otherwise have to curl, as described above.
  • Adjacent the closed end 1a of the bag are optional seal lines 8, 9a and 9b the purpose of which will be described later.
  • the film used for manufacturing the bag 1 may be a mono-layer film, but is preferably a multi-layer film having different functions for the individual layers of the bag.
  • one of the intermediate layers of the bag material may be a barrier layer in order to control the transmission of gas (for example O 2 ) between the interior and exterior of the bag when sealed
  • another of the layers of the bag material on the inside of bag will be a sealing layer facilitating sealing to a similar material for the purposes of closing the bag when loaded
  • a third layer will be an abuse-resistant layer giving strength to the bag material.
  • Other functions may also be provided, for example there may be tie layers between any of the above mentioned layers.
  • the thickness of films suitable for the manufacture of transverse-sealed bags is typically comprised between about 35 and about 120 mm, preferably between about 40 and about 100 mm. Thicker films as well as thinner films, e.g. films 15, 20, 25, 30 mm thick may however be employed in the process of the present invention.
  • Figs. 1 and 2 The apparatus for producing a bag of the type shown in Figs. 1 and 2 will now be described with reference to Figures 3 and 4, Fig. 3 showing a prior art apparatus for manufacturing a strip of side-sealed packaging bags, and Fig. 4 showing a modification which produces the bags in accordance with the present invention.
  • FIG. 3 there is shown bag making apparatus 10 which processes a flat folded tubular film 12 which may either have come straight from a bubble extrusion manufacturing plant or may have been previously formed by bubble extrusion and then rolled up for reuse at a later date at which point the roll is unwound so that the film can be fed to the bag making apparatus 10.
  • the tubular material 12 arrives at a bag opening station 14 which includes a horizontally arranged knife blade 16 which can serve to slit the film 12 at the right-hand marginal fold as shown in Fig. 3.
  • the film 12 arrives at an optional air introduction station 18 including an air nozzle 20 which is supported on the machine frame and is cantilevered to extend across the width of the flat folded film to introduce air near the left-hand fold line (which corresponds to the closed end 1a in Figs. 1 and 2). This may be helpful in case bags with the optional EZO feature, which will be described later, are manufactured.
  • the film 12 arrives at a bottom forming station 22 which is optional but which in the present embodiment creates the seal lines 8, 9a and 9b to provide a particular easy open (EZO) configuration to the closed or bottom end of the bag so that the bag is substantially in accordance with US-A-6,260,705.
  • EZO easy open
  • the already slit film material then arrives at a transverse sealing station 24 including vertically closable and openable seal bars 26 and 28 which operate in synchronisation with stepwise advance of the tubular film material 12 so as to define a plurality of spaced transverse seal lines 30 which each include two spaced lines parallel sealing adjacent bags, one of such lines being associated with each of the adjacent bags, and between them a perforation line to allow the bags to be separated from one another at a downstream station.
  • the bag material just at the slitting station 14 and downstream therefrom undergoes considerable curling particularly at the mouth end of the bag, and this results in pleats and wrinkles at the transverse sealing operation at station 24, particularly when the film material is of a heat shrinkable nature.
  • the selvage 34 of the film material along the right-hand fold of the tubular material 12 is removed in its entirety by means of a vertically aligned trimming knife blade 32 which separates the selvage 34 to be sucked into an aspiration nozzle 36.
  • the chain of perforated and side-sealed bags downstream of the knife 32 can then either be wound up for subsequent use, or be separated and reassociated in shingled or imbricated form on guide tapes, or possibly stacked vertically and delivered as a wicket of stacked bags, depending upon the type of bag loader for which they are to be used.
  • the mouth of the bag along the right-hand edge, corresponding to the right-hand end 7 of the bag in Figs. 1 and 2 is closed by any convenient mechanism, preferably by heat seal bars, and then the bag can be subjected to a heat-shrinking operation which serves to tidy the structure of the bag around a product article which was loaded therein before the bag closing operation.
  • the shrinking operation also results in formation of loose tabs or ears, illustrated by the portions 8a and 8b (Fig. 1) of the bag bottom to either side of the central V-notch shown therein (defined by the seal lines 9a and 9b), at which tearing of the bag can be initiated by pulling the two ears 8a and 8b apart from one another.
  • This particular easy open feature is very useful for a shrink package but, as indicated above, is optional and can be used with or without the curl-preventing mouth structure in accordance with the present invention.
  • Fig. 4 The difference between the prior art apparatus of Fig. 3 and the embodiment of the present invention shown in Fig. 4, which provides a bag in accordance with the present invention, resides in the fact that the film opening station 14 of Fig. 3 is replaced by a modified bag slitting station in Fig. 4, where the knife blade 17 is vertically aligned as compared with the horizontal alignment of the knife blade 16 at the film slitting station 14 of Fig. 3.
  • the tube-slitting blade 17 is associated with a support 19 which carries both the knife blade 17 on the outside of the tubular film material 12 and an anvil (46 in Fig. 5) inside the tubular material so that the blade 17 can form a slit (illustrated at 7a in Fig.
  • this slit 7a formed by the knife blade 17 in Fig. 4 forms, at a single stroke, the bag mouth in accordance with the present invention.
  • the support 19 carrying the tube-slitting blade 17 and the anvil 46 is mounted on the machine frame so as to be released when desired, and so as to be adjustable in position in a direction transverse to the machine direction (i.e. to the direction of movement of the film web 12).
  • the apparatus of Fig. 4 again includes the optional bottom-forming station 22 which may be used in conjunction with the optional air-introduction station 18 also shown in Figure 3.
  • the optional air introduction station 18 can be located on the carrier 19 of the slitting station 15.
  • the air introduction station 18 it is equally possible for the air introduction station 18 to be positioned downstream of the slitting station 15 but upstream of the optional bottom forming station 22.
  • the transverse sealing station 24 in Fig. 4 is identical to that of Fig. 3 and will not be described in more detail.
  • a further difference between the device of Fig. 4 in accordance with the present invention and the prior art embodiment of Fig. 3 is that there is no longer any need to remove the selvage material as shown at 32, 34, 36 in Fig. 3 because the reinforcement of the mouth portion, relying on the staggered mouth edges 6 and 7 (Fig. 2) and the folded over configuration of the projecting edge 7 (Fig. 1), rigidifies the bag structure sufficiently to eliminate the curling, and the absence of curling can be readily appreciated from the drawing of Fig. 4.
  • the perforated chain of bags delivered at the far end of the apparatus as viewed in Fig. 4 can then either be immediately separated into individual bags for wicketing or imbricating or can remain as a chain of side-sealed bags for rolling up and storage.
  • Both the Fig. 3 prior art embodiment and the Fig. 4 embodiment of the present invention include also a mouth separating blade 40 which serves merely to hold the right-hand edges of the upper 2 and lower 3 plies of the folded film 12 apart from one another and to guide them into the area between the jaws 26 and 28 of the transverse sealing station 24.
  • the sealing station 24 in Fig. 4 operates in an intermittent manner synchronously with the stepwise movement of the bag chain.
  • the modified apparatus 11 of Fig. 4 is threaded up in a similar manner except that the combined tube slitting station 15 and the optional air introduction station 18 provide for (i) the support 19 with the blade 17 to be removed from the bag path and for the nozzle then to be introduced between the opposed plies 2 and 3 of the centred folded film 12 once a slit (7a in Fig. 2) has been formed manually, and (ii) the air introduction station 18 (where fitted) to be similarly removed and then replaced after slitting the tube manually.
  • the film material can then be advanced such that the anvil (46 in Fig. 2) at the slitting station 15 and the air nozzle 20a of the optional air introduction station 18 can be introduced into the space between the two opposed plies (2 and 3 in Fig.
  • the anvil 46 and the slitting blade 17 of Fig. 4 are also adjustable in a direction perpendicular to the machine direction for accommodating flat folded films 12 of different widths.
  • Fig. 5 shows the knife blade 17 on the carrier 19 and in the process of forming the cut 7a in the upper ply 2 of the material 12a and leaving the underneath ply 3 uncut.
  • the sub-carrier 42 is bolted to the main carrier 19 by means of bolts (not shown) which engage in holes 44 of the main carrier 19.
  • the entire carrier 19 is releasably mounted on the machine frame so that it can be introduced into the already slit tubular film so that subsequent operation of the apparatus will continue the slitting action.
  • the carrier 19, and the sub-carrier 42 and the air introduction nozzle 20a carried thereby, are in this way able to be rigidly mounted on the machine frame once it has been introduced into the already pre-positioned tubular film.
  • the lower film ply 3 is shown in section along its entire length in Fig. 5 and the upper film ply 2 is only shown in section up to the point where it arrives at the tip of the slitting blade 17. Thereafter it has been slit and the exposed face 6 of the ply 2 can be seen, except where it is concealed behind the rear surface of the main carrier 19.
  • Fig. 1 shows this optional characteristic as comprising a first seal line 8 which is parallel to and disposed inwardly of the fold defining the bottom end 1a of the bag, and a pair of additional seal lines 9a, 9b which start from the bottom end 1a of the bag and converge towards one another in a direction towards the seal line 8.
  • these additional lines 9a and 9b meet at the seal line 8, but this is not essential to the operation of the easy open means defined by the lines 8, 9a, 9b.
  • An "easy-open” (EZO) pre-cut line 9c extends longitudinally of the bag (i.e. perpendicularly to the seal line 8 and to the bottom end 1a of the bag so as to define a point of initiation of a tear when the bag is to be open. This opening operation will occur after the open end of the bag at 6, 7 has been sealed and the thus sealed bag has been subjected to a shrinking operation.
  • the bag closing operation involves placing the loaded bag into a vacuum chamber which exposes the exterior of the sealed bag to reduced pressure causing the bag to balloon slightly, and causing the sealed pockets 8a, 8b of the bottom end of the bag to inflate slightly to present the tabs or ears mentioned above.
  • the thus partially evacuated and sealed bag is subjected to a heat shrinking operation, either in a hot air shrink tunnel or in a shrink bath, whereupon the bag material between the seal line 8 and the closed mouth end of the bag will hug the contours of the product within the bag to provide a tidy package, but the pockets 8a, 8b will protrude from the surface, in the manner described in US-A-6,260,705.
  • perforation line 9c is optional, and that instead some other form of tear-initiating formation could be provided.
  • a hole is formed centrally in the triangular region defined between the fold line 1a of the tubular film material and the converging additional seal lines 9a, 9b.
  • tear-initiating means could be omitted and one could rely simply on the fact that it is easy to apply tearing tension to the film material simply by grasping the two ears defined by the pockets 8a, 8b and pulling them apart.
  • the tear-initiating bottom formation 8, 8a, 8b, 9a, 9b, 9c is optional and it would have been possible for the bag to be finished with simply the fold line 1a defining the closed end of the product compartment of the bag.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
EP02254428A 2002-06-25 2002-06-25 Sachet d'emballage, procédé et dispositif pour sa fabrication Withdrawn EP1375365A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP02254428A EP1375365A1 (fr) 2002-06-25 2002-06-25 Sachet d'emballage, procédé et dispositif pour sa fabrication
EP03011985A EP1375366A1 (fr) 2002-06-25 2003-05-28 Sachet d'emballage, procédé et dispositif pour sa fabrication
US10/603,028 US20040001652A1 (en) 2002-06-25 2003-06-24 Packaging bag, and method of and apparatus for manufacturing the same
NZ526659A NZ526659A (en) 2002-06-25 2003-06-24 Packaging bag having mouth opening with its lip turned over, and method of and apparatus for manufacturing the same
AU2003204934A AU2003204934A1 (en) 2002-06-25 2003-06-25 Packaging bag, and method of and apparatus for manufacturing the same
CA002433207A CA2433207A1 (fr) 2002-06-25 2003-06-25 Sac facile a remplir

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02254428A EP1375365A1 (fr) 2002-06-25 2002-06-25 Sachet d'emballage, procédé et dispositif pour sa fabrication

Publications (1)

Publication Number Publication Date
EP1375365A1 true EP1375365A1 (fr) 2004-01-02

Family

ID=29716926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02254428A Withdrawn EP1375365A1 (fr) 2002-06-25 2002-06-25 Sachet d'emballage, procédé et dispositif pour sa fabrication

Country Status (5)

Country Link
US (1) US20040001652A1 (fr)
EP (1) EP1375365A1 (fr)
AU (1) AU2003204934A1 (fr)
CA (1) CA2433207A1 (fr)
NZ (1) NZ526659A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109572059A (zh) * 2019-01-17 2019-04-05 青岛英力特包装机械有限公司 一种立体袋制作装置及方法
CN110027753A (zh) * 2019-04-22 2019-07-19 厦门谱睿科技有限公司 一种珍珠棉包装袋边缘封口的方法及珍珠棉包装袋

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070045153A1 (en) * 2005-08-30 2007-03-01 Bautista Roque Y Hanging secondary package of disposable absorbent articles
US20080096452A1 (en) * 2006-09-19 2008-04-24 Tredegar Film Products Corporation Breathable Laminate With A High Abrasion Resistance and Method of Manufacturing the Same
US10577218B2 (en) * 2015-03-10 2020-03-03 Christopher A. Rodgers Rapid rope
CN109080214B (zh) * 2018-09-05 2023-11-21 东莞市本润机器人科技股份有限公司 一种包装盒热收缩膜热切口装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2873566A (en) * 1957-07-01 1959-02-17 Amsco Packaging Machinery Inc Merchandise container and method of making a merchandise package therefrom
GB911874A (en) * 1959-11-21 1962-11-28 Steffen Hammer Improvements in and relating to the production of reinforced bags
US3358906A (en) * 1966-12-29 1967-12-19 Lamson Paragon Ltd Heat sealable plastic material bags for coins
DE1486527A1 (de) * 1965-12-20 1969-04-24 Mittelrheinische Plastik Gmbh Tragetasche aus thermoplastischem Kunststoff
DE1940404A1 (de) * 1969-08-08 1971-04-22 Herkules Papiersackfabriken Br Behaeltnis in Form eines Sackes,Beutels od.dgl. aus Kunststoffolie und Verfahren zu seiner Herstellung
US3647060A (en) * 1969-03-25 1972-03-07 Mobil Oil Corp Roll double-pocketed bag structures
DE19618814A1 (de) * 1996-05-10 1997-11-13 Auto Cover Gmbh Produktion Und Verfahren zum Herstellen und Bereitstellen von Fahrzeugsitz-Schutzbezügen
US6260705B1 (en) * 1999-11-15 2001-07-17 Cryovac, Inc. Heat shrinkable pouch
US6363694B1 (en) * 1998-04-06 2002-04-02 International Paper Company Bag for use in an automatic bag filling process

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2807265A (en) * 1955-07-26 1957-09-24 Michael D Oliva Pocket for ring binders
US2878849A (en) * 1955-09-12 1959-03-24 Polyfab Company Flexible bags of plastic sheet material
US3070278A (en) * 1960-08-29 1962-12-25 Korn Meyer Bag
US3151803A (en) * 1962-05-29 1964-10-06 Int Minerals & Chem Corp Reusable mailing device
US3420433A (en) * 1967-08-07 1969-01-07 Union Carbide Corp Flat bag and overflapped adhesive tape closure therefor
BE792014A (fr) * 1972-02-16 1973-03-16 Fmc Corp Sac en matiere plastique a lien solidaire et procede de fabrication d'un tel sac
US3779449A (en) * 1972-05-05 1973-12-18 H Membrino Linear strip of severable bags
DE2910851C2 (de) * 1979-03-20 1982-12-16 Minigrip Europe Gmbh, 7000 Stuttgart Kunststoffolienbeutel und Verfahren zu seiner Herstellung
US4616472A (en) * 1985-10-10 1986-10-14 W. R. Grace & Co., Cryovac Div. Method and apparatus for loading side-seal bags
US4871046A (en) * 1988-05-23 1989-10-03 Turner Kenneth R Disposable stethoscope head shield
US5533810A (en) * 1994-07-07 1996-07-09 Jensen; Daniel L. Document carrier

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2873566A (en) * 1957-07-01 1959-02-17 Amsco Packaging Machinery Inc Merchandise container and method of making a merchandise package therefrom
GB911874A (en) * 1959-11-21 1962-11-28 Steffen Hammer Improvements in and relating to the production of reinforced bags
DE1486527A1 (de) * 1965-12-20 1969-04-24 Mittelrheinische Plastik Gmbh Tragetasche aus thermoplastischem Kunststoff
US3358906A (en) * 1966-12-29 1967-12-19 Lamson Paragon Ltd Heat sealable plastic material bags for coins
US3647060A (en) * 1969-03-25 1972-03-07 Mobil Oil Corp Roll double-pocketed bag structures
DE1940404A1 (de) * 1969-08-08 1971-04-22 Herkules Papiersackfabriken Br Behaeltnis in Form eines Sackes,Beutels od.dgl. aus Kunststoffolie und Verfahren zu seiner Herstellung
DE19618814A1 (de) * 1996-05-10 1997-11-13 Auto Cover Gmbh Produktion Und Verfahren zum Herstellen und Bereitstellen von Fahrzeugsitz-Schutzbezügen
US6363694B1 (en) * 1998-04-06 2002-04-02 International Paper Company Bag for use in an automatic bag filling process
US6260705B1 (en) * 1999-11-15 2001-07-17 Cryovac, Inc. Heat shrinkable pouch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109572059A (zh) * 2019-01-17 2019-04-05 青岛英力特包装机械有限公司 一种立体袋制作装置及方法
CN109572059B (zh) * 2019-01-17 2024-01-26 青岛英力特包装机械有限公司 一种立体袋制作装置及方法
CN110027753A (zh) * 2019-04-22 2019-07-19 厦门谱睿科技有限公司 一种珍珠棉包装袋边缘封口的方法及珍珠棉包装袋

Also Published As

Publication number Publication date
CA2433207A1 (fr) 2003-12-25
US20040001652A1 (en) 2004-01-01
NZ526659A (en) 2004-08-27
AU2003204934A1 (en) 2004-01-22

Similar Documents

Publication Publication Date Title
EP2261130B1 (fr) Sacs pour consommateurs et procédés de fabrication et systèmes de distribution de sacs pour consommateurs
EP0730524B1 (fr) Sacs et procedes de fabrication de sacs
US6793613B2 (en) Bag blocks
JP2001058654A (ja) 包装容器、包装容器形成装置、クロージャ形成方法、およびクロージャ形成装置
JPH11510461A (ja) ジッパ付きフィルムおよび袋
US3332324A (en) Method and apparatus for the manufacture of a combined web of material suitable for the manufacture of pouches
CA2534025A1 (fr) Machine d'emballage pour produire des sachets tubulaires et sachets tubulaires ainsi obtenus
US6015373A (en) Method for wicket-top converting of a cross-laminated synthetic resin fiber mesh bag
EP1375365A1 (fr) Sachet d'emballage, procédé et dispositif pour sa fabrication
US6080093A (en) Apparatus for wicket-top converting of a cross-laminated synthetic resin fiber mesh bag
US3579397A (en) Process of manufacturing bags having tear strips and consisting of synthetic thermoplastics
US20170369208A1 (en) Bags and methods of making bags
US20060089243A1 (en) Duplex bag
EP1375366A1 (fr) Sachet d'emballage, procédé et dispositif pour sa fabrication
US4822437A (en) Method and apparatus for making non-roping thermoplastic draw tape for thermoplastic bags
US11518134B2 (en) Method and apparatus for making draw strip bags
WO1983004011A1 (fr) Procede et dispositif de formation continue d'emballages refermables d'articles
JPH04242568A (ja) 包装体及びその製造方法
JP2517835B2 (ja) 自動包装機
JP5635542B2 (ja) 製袋充填機における袋開封部形成装置
EP2764990B1 (fr) Procédé de production d'un récipient
CA2170769C (fr) Sacs et procedes de fabrication de sacs
JPH0219275A (ja) 開封部を設けたシュリンク包装体及びその製法
JPS6127253B2 (fr)
JPH08216302A (ja) 手提げ用の外装袋及びその外装袋を製造するための製袋機

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20040703