GB1587621A - Method for intermittently packing a tubular packaging material - Google Patents
Method for intermittently packing a tubular packaging material Download PDFInfo
- Publication number
- GB1587621A GB1587621A GB3493477A GB3493477A GB1587621A GB 1587621 A GB1587621 A GB 1587621A GB 3493477 A GB3493477 A GB 3493477A GB 3493477 A GB3493477 A GB 3493477A GB 1587621 A GB1587621 A GB 1587621A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tubular film
- polyethylene
- segment
- open
- vacuum
- 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
Links
Classifications
-
- 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
- B65D75/40—Packages formed by enclosing successive articles, or increments of material, in webs, e.g. folded or tubular webs, or by subdividing tubes filled with liquid, semi-liquid, or plastic materials
- B65D75/44—Individual packages cut from webs or tubes
-
- 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
- B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
- B65B9/13—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the preformed tubular webs being supplied in a flattened state
- B65B9/14—Devices for distending tubes supplied in the flattened state
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
Description
(54) METHOD FOR INTERMITTENTLY PACKING
A TUBULAR PACKAGING MATERIAL
(71) We, ASAHI-DOW LIMITED, a corporation organised under the laws of Japan, of 1-2, Yurakucho l-chome, Chiyoda-ku,
Tokyo, Japan, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: - The present invention concerns a method for intermittently packing tubular packaging materials.
According to the present invention there is provided a method of packing a tubular packaging material comprising providing an elongate tubular film of flexible plastics material, the tubular film being circumferentially gathered and air-tightly ligated at regular intervals so that the segments of the tubular film between the ligations are in a collapsed but not evacuated condition; in termittently feeding the segments of the tubular film to an open-ended cylindrical packing zone which has peripheral perforations through which suction may be applied to the outside of a tubular film segment within the packing zone; opening the leading end of a tubular film segment which is to receive a filling by severing the ligation at that end; holding the segment open in the packing zone by applying suction to the outside of the open-ended segment; inserting a filling to be packaged into the openended segment; severing the open-ended segment from the rest of the tubular film beyond the ligation at its closed end thereby opening the leading end of the subsequent tubular film segment; releasing the suction to allow the packed segment to be removed from the packing zone; and ligating the open end of the packed segment to form a sealed package containing the filling.
Preferably the open ended tubular film segment is opened-out by blowing air into the segment before being held in the packing zone under the action of suction.
Advantageously, the cylindrical packing zone comprises a double-walled tube member having a cylindrical outer wall and a cylindrical inner perforated wall spaced inward from the outer wall, the outer and inner walls defining an annular chamber which is closed at its opposite ends by end sealing members and adapted to be connected to a source of vacuum, the inner periphery of the inner perforated wall being adapted to receive and hold open the open ended tubular film segment by applying vacuum thereto through said annular chamber.
This holder forms the subject of our copending patent application No. 30582/78 (Serial No. 1587622).
The present invention will now be described in more detail with reference to the accompanying drawings in which:
Figure 1 is a schematic side view showing a length of elongate tubular film as used in the present invention;
Figure 2 illustrates a packing operation carried out according to the present invention by using a packaging material as shown in Figure 1;
Figure 3 illustrates another packing operation effected according to the present invention by using a packaging material as shown in Figure 1;
Figure 4 shows a package produced according to the process of the pr.esent invention;
Figure 5 is a schematic side view showing a length of another tubular film which may be used in the present invention, the tube being provided with hanging straps on the ligations thereon;
Figure 6 shows a package produced using the packaging material shown in Figure 5; and
Figure 7 is a longitudinally sectional view showing a vacuum-suction holder which may be used in the method according to the present invention.
Referring to Figure 1, a packaging material 10 used in the present invention comprises a continuous length of tube 11 which is made of flexible film or laminated film formed from any heat-shrinkable synthetic resin having oxygen and water vapor barrier properties. Such synthetic resins in clude polyvinyl chloride, vinylidene chloride-vinyl chloride copolymer, ionomer, poly propylene, polyethylene, polyester, polyamide polymer, polyvinyl alcohol, ethylene
vinyl acetate copolymer resin, irradiated polyethylene and the like. It is preferred to
use films formed from vinylidene chloridevinyl chloride copolymer or polyamide polymer. It is further preferred to use vinylidene chloride-vinyl chloride copolymer films because they have better heat-shrink
ability and oxygen and water vapor barrier properties.Aluminum foil may be used as
a layer in the tube-shaped film.
If the flexible laminated film is used to form the tube 11, it may include one of the following laminated structures: polyamide polymer/polyethylene, polyamide polymer! ethylene-vinyl acetate copolymer resin, vinylidene chloride-vinyl chloride copolymer/ethylene-vinyl acetate copolymer resin, polyethylene/polyamide polymer/ polyethylene, polyethylene/vinylidene chloride-vinyl chloride copolymer/polyethylene, polyethylene/vinylidene chloride-vinyl chloride-vinyl chloride copolymer I ethylene-vinyl acetate copolymer resin, polyethylene/polyamide polymerlethylene-vinyl acetate copolymer resin, polyethylene/aluminum foil/ polyethylene, polypropylene/ aluminium foil polypropylene, vinylidene chloride-vinyl chloride copolymer/irradiated polyethylene, polyamide polymer/vinylidene chloridevinyl chloride copolymer/polyethylene, polyester/polypropylene, polyester/polyethylene, polyethylene/polyester/polyethylene, polypropylene/polyester/polypropylene, polyester/aluminum foil/polyethylene and polyester/aluminum foil/polypropylene. The laminated structure is preferably polyamide polymer/polyethylene, polyamide polymer/ ethylene-vinyl acetate copolymer resin or vinylidene chloride-vinyl chloride copolymer/ethylene-vinyl acetate copolymer resin.
The oxygen barrier property may be indicated by oxygen permeability. Preferable value is 1200 cc/mil/m2/25 hrs/l atm or less measured by ASTM-D-1434 at 23"C under 0% RH (relative humidity) in the present invention. The water vapor barrier property may be indicated by water vapor permeability which is preferred to be 50 gram/m2/24 hrs or less measured by
ASTM-E-96 at 37"C under 90% RH in the present invention.
The tube 11 has flat width of 50 mm to 600 mm, interval between ligations described hereinafter of 150 mm to 1000 mm, and film thickness of 15 lt to 100 ,u.
Referring again to Figure 1, it can be seen that the tube 11 is circumferentially gathered and ligated airtightly at regular intervals by any suitable means such as aluminum wire, cotton yarn or the like to form a plurality of ligations 12 disposed at equalized distance along the length of the tube 11 to define a sequence of tubular film segments. The tubular film segments between the ligation are in a collapsed form and contain only a small amount of air but are not evacuated. The amount of air contained in the segments is of no significance unless it adversely effects the feeding and packing operation described subsequently.
The tube 11 may be wound into a roll (not shown). The rolled or folded over tube 11 is fed intermittently to a packing station. The fed tube 11 includes a tube segment 13 having an opened end which results from severing the tube 11 at a position immediately behind the ligation 12 of the preceding tube portion to form a tube segment 14.
The open-ended tube segment 13 which reaches the packing station is widened at the open end thereof and firmly held in a cylindrical chamber having inner periphery through which vacuum or suction is applied to the outer periphery of the tube segment 13 disposed therein. Further more, the tube segment 13 may be opened-out by blowing air through any suitable pipe means prior to holding under vacuum.
The widened tube segment 13 is then packed with any object such as crude meat through the widened end thereof and thereafter served at a position of the tube 11 immediately behind the ligation 12 on the closed end of the packed tube segment 13 to form a packed tube segment 14. The opened end of the packed tube segment 14 is then sealingly ligated by an aluminum wire as shown by 12A in Figure 4 and removed from the packing station as by releasing the suction or action of vacuum.
After removing, the sealed tube segment 14 may be subjected to any subsequential procedure such as heat-shrinkillg, surface sterilization or the like, resulting in a package 15 as shown in Figure 4. Although the tube has been described as fed horizontally to the packing station, it may be fed vertically to a packing station in which liquid rather than solid foodstuffs may be packed the tube segment 14. In this case, the tube 11 is severed at a position immediately before the ligation 12 of that tube segment 13 following the leading tube portion to be cut off. The tube segment 14 cut off is held with its widened end thereof oriented upward. Under such a state, similarly, the tube segment 14 is packed with any object such as solid or liquid foodstuffs.
As shown in Figure 5, each ligation 12 on the tube 11 may have a hanging strap 16 such as cotton yarn. The hanging strap 16 may be attached at each of the ligations 12 to the tube 11 at the same time as the aluminum wires are wound around the tube 11. Such a packing material provides a sealed package 15A with its hanging strap 16 as shown in Figure 6.
Figure 7 shows a vacuum-suction holder which is effective to use in the above method according to the present invention.
This holder forms the subject of our copending application No. 30582/78. (Serial
No. 1587622). This holder comprises a double-walled tube member 20 having a cylindrical outer wall 21 and a cylindrical inner perforated wall 22 spaced inward from the outer wall 21. The inner perforated wall 22 has a plurality of small openings 23 therethrough over the length and periphery thereof. The outer and inner walls 21 and 22 define an annular vacuum chamber 24 therebetween which is adapted to be connected to a source of vacuum (not shown) through at least one duct 25 mounted on the outer wall 21. The vacuum chamber 24 is sealingly closed at opposite ends by end sealing members 26 which may be mounted on any suitable fixed base.The inner perforated wall 22 is adapted to receive and hold the tubular film in an open condition on the inner periphery of the inner wall 22 under suction or the action of vacuum applying to the small openings 23 thereof through the vacuum chamber 24 from the source of vacuum via the ducts 25.
A flexible, porous layer 27 is preferably located over the inner periphery of the inner perforated wall 22. The layer 27 may be made of open cell cellular material selected from rubber sponge, foamed polyurethane or the like. Alternatively, the layer 27 may be made of non-woven fabric of polyamide polymer, rock wool, glass wool etc.
The flexible, porous layer 27 can be deformed radially inward when the tubular film is received over the outer surface 28 of the layer 27 and the vacuum is applied to the inner periphery of the inner perforated wall 22 through the small openings 23 thereof. Therefore, the layer 27 will automatically accommodate various diameters of tubular films to be held in the range from the substantial inner diameter of the cylindrical layer 27 to the substantial inner diameter of the inner perforated wall 22.
It is to be understood that the holder shown in Figure 7 can be used to hold various known packaging materials such as pre-cut tube-shaped films having clipped or heat-sealed ends, at a packing station.
WHAT WE CLAIM IS:
1. A method of packing a tubular packaging material comprising providing an elongate tubular film of flexible plastics material, the tubular film being circumferentially gathered and air-tightly ligated at regular intervals so that the segments of the tubular film between the ligations are in a collapsed but not evacuated condition; intermittently feeding the segments of the tubular film to an open-ended cylindrical packing zone which has peripheral perforations through which suction may be applied to the outside of a tubular film segment within the packing zone; opening the leading end of a tubular film segment which is to receive a filling by severing the ligation at that end; holding the segment open in the packing zone by applying suction to the outside of the open-ended segment; inserting a filling to be pacakaged into the open-ended segment; severing the openended segment from the rest of the tubular film beyond the ligation at its closed end thereby opening the leading end of the subsequent tubular film segment; releasing the suction to allow the packed segment to be removed from the packing zone; and ligating the open end of the packed segment to form a sealed tubular package containing the filling.
2. A method as claimed in Claim 1 wherein the open-ended tubular film segment is opened-out by blowing air into the segment before being held in the packing zone under the action of suction.
3. A method as claimed in Claim 1 or 2 wherein the tubular film consists of one of more layers, the or each of which is made of polyvinyl chloride, vinylidene chloride-vinyl chloride copolymer, ionomer, polypropylene, polyethylene, polyester, polyamide polymer, polyvinyl alcohol, ethylene-vinyl acetate copolymer resin, aluminum foil, or irradiated polyethylene.
4. A method as claimed in Claim 1 or 2 wherein the tubular film is a flexible lamination comprising one of the following laminated structures: polyamide polymer/ polyethylene polyamide polymer! ethylenevinyl acetate copolymer resin, vinylidene chloride-vinyl chloride copolymer/ethylene-vinyl acetate copolymer resin, poly ethylene! polyamide polymer/ polyethylene, polyethylene/vinylidene chloride-vinyl chloride copolymer/polyethylene, polyethylene/ vinylidene chloride- vinyl chloride copoly mer I ethylene-vinyl acetate copolymer resin, polyethylene! polyamide polymer ethylenevinyl acetate copolymer resin, polyethylene/ aluminum foil/ polypropylene, vinylidene chloride-vinyl chloride copolymer/ irradiated polyethylene, polyamide polymer! vinylidene chloride-vinyl chloride copolymer/polyethy- lene, polyester/polyethylene, polyester/ poly-propylene, polyethylene! polyester! polyethylene, polypropylene! polyester! poly- propylene, polyester/aluminum foil /polyethylene and polyester/aluminum foil/polypropylene.
5. A method as claimed in any one of
Claims 1 to 4 wherein the tubular film
has an oxygen permeability of 1200 ccl mil/m2/24 hrs/1 atm or less measured by
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (15)
1. A method of packing a tubular packaging material comprising providing an elongate tubular film of flexible plastics material, the tubular film being circumferentially gathered and air-tightly ligated at regular intervals so that the segments of the tubular film between the ligations are in a collapsed but not evacuated condition; intermittently feeding the segments of the tubular film to an open-ended cylindrical packing zone which has peripheral perforations through which suction may be applied to the outside of a tubular film segment within the packing zone; opening the leading end of a tubular film segment which is to receive a filling by severing the ligation at that end; holding the segment open in the packing zone by applying suction to the outside of the open-ended segment; inserting a filling to be pacakaged into the open-ended segment; severing the openended segment from the rest of the tubular film beyond the ligation at its closed end thereby opening the leading end of the subsequent tubular film segment; releasing the suction to allow the packed segment to be removed from the packing zone; and ligating the open end of the packed segment to form a sealed tubular package containing the filling.
2. A method as claimed in Claim 1 wherein the open-ended tubular film segment is opened-out by blowing air into the segment before being held in the packing zone under the action of suction.
3. A method as claimed in Claim 1 or 2 wherein the tubular film consists of one of more layers, the or each of which is made of polyvinyl chloride, vinylidene chloride-vinyl chloride copolymer, ionomer, polypropylene, polyethylene, polyester, polyamide polymer, polyvinyl alcohol, ethylene-vinyl acetate copolymer resin, aluminum foil, or irradiated polyethylene.
4. A method as claimed in Claim 1 or 2 wherein the tubular film is a flexible lamination comprising one of the following laminated structures: polyamide polymer/ polyethylene polyamide polymer! ethylenevinyl acetate copolymer resin, vinylidene chloride-vinyl chloride copolymer/ethylene-vinyl acetate copolymer resin, poly ethylene! polyamide polymer/ polyethylene, polyethylene/vinylidene chloride-vinyl chloride copolymer/polyethylene, polyethylene/ vinylidene chloride- vinyl chloride copoly mer I ethylene-vinyl acetate copolymer resin, polyethylene! polyamide polymer ethylenevinyl acetate copolymer resin, polyethylene/ aluminum foil/ polypropylene, vinylidene chloride-vinyl chloride copolymer/ irradiated polyethylene, polyamide polymer! vinylidene chloride-vinyl chloride copolymer/polyethy- lene, polyester/polyethylene, polyester/ poly-propylene, polyethylene! polyester! polyethylene, polypropylene! polyester! poly- propylene, polyester/aluminum foil /polyethylene and polyester/aluminum foil/polypropylene.
5. A method as claimed in any one of
Claims 1 to 4 wherein the tubular film
has an oxygen permeability of 1200 ccl mil/m2/24 hrs/1 atm or less measured by
ASTM-D-1434 at 23"C under 0% R.H., a water vapor permeability of 50 gram/24 hrs/m2 or less measured by ASTM-E-96 at 37"C under 90% R.H., and a heat shrinkability of 3% or more in hot water of 93"C for 10 seconds.
6. A method as claimed in any one of
Claims 1 to 5 wherein the tubular film has a flat width of 50 to 600 mm, an interval between the ligations of 150 to 1000 mm, and a film thickness of 15 Zt to 100
7. A method as claimed in any one of
Claims 1 to 6 wherein each of the ligations on the tubular film is provided with a hanging strap.
8. A method as claimed in any one of
Claims 1 to 7 wherein the cylindrical packing zone comprises a double-walled tube member having a cylindrical outer wall and a cylindrical inner perforated wall spaced inward from the outer wall, the outer and inner walls defining an annular chamber which is closed at its opposite ends by end sailing members and adapted to be connected to a source of vacuum, the inner periphery of the inner perforated wall being adapted to receive and hold open the open ended tubular film segment by applying vacuum thereto through said annular chamber.
9. A method as claimed in Claim 8 wherein the holder further includes a flexible, porous layer located over the inner periphery of the inner perforated wall, the layer being adapted to accomodate various diameters of tubular film.
10. A method as claimed in Claim 9 wherein the flexible porous layer is made of open cell cellular material.
11. A method as claimed in Claim 10 wherein the open cell cellular material is rubber sponge or foamed polyurethane.
12. A method as claimed in Claim 9 wherein the flexible porous layer is made of non-woven fabric.
13. A method as claimed in Claim 12 wherein the non-woven fabric is made of polyamide polymer, rock wool or glass wool.
14. A method as claimed in Claim 1 substantially as described herein with reference to Figs. 1, 2, and 4, Figs. 3 and 4, or Figs. 5 and 6 or those Figures together with Fig. 7 of the accompanying drawings.
15. A package produced by a method as claimed in any one of Claims 1 to 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3493477A GB1587621A (en) | 1977-08-19 | 1977-08-19 | Method for intermittently packing a tubular packaging material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3493477A GB1587621A (en) | 1977-08-19 | 1977-08-19 | Method for intermittently packing a tubular packaging material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1587621A true GB1587621A (en) | 1981-04-08 |
Family
ID=10371758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3493477A Expired GB1587621A (en) | 1977-08-19 | 1977-08-19 | Method for intermittently packing a tubular packaging material |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1587621A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4606922A (en) * | 1983-04-21 | 1986-08-19 | W. R. Grace & Co., Cryovac Div. | Cook-in meat packaging |
-
1977
- 1977-08-19 GB GB3493477A patent/GB1587621A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4606922A (en) * | 1983-04-21 | 1986-08-19 | W. R. Grace & Co., Cryovac Div. | Cook-in meat packaging |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |