EP0524539A1 - Sac en matière thermoplastique permettant l'échappement d'air - Google Patents

Sac en matière thermoplastique permettant l'échappement d'air Download PDF

Info

Publication number
EP0524539A1
EP0524539A1 EP92112068A EP92112068A EP0524539A1 EP 0524539 A1 EP0524539 A1 EP 0524539A1 EP 92112068 A EP92112068 A EP 92112068A EP 92112068 A EP92112068 A EP 92112068A EP 0524539 A1 EP0524539 A1 EP 0524539A1
Authority
EP
European Patent Office
Prior art keywords
sheet
bag
polyethylene
welds
filtering
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Withdrawn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
EP92112068A
Other languages
German (de)
English (en)
Inventor
Pier Francesco Zamboni
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.)
BL Macchine Automatiche SpA
Original Assignee
BL Macchine Automatiche 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 BL Macchine Automatiche SpA filed Critical BL Macchine Automatiche SpA
Publication of EP0524539A1 publication Critical patent/EP0524539A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/01—Ventilation or drainage of bags

Definitions

  • the invention relates to a bag made of thermoplastic material, for example polyethylene, which if necessary may easily be produced on a bag-filling machine by making small modifications to the latter, and wich is capable of permitting the outflow of air incorporated in the product contained in the bag.
  • thermoplastic material for example polyethylene
  • wich tend to incorporate air.
  • the stacking of bags containing such products mixed with air is extremely difficult.
  • At least one wall of the bag is formed by at least one outer sheet of polyethylene or other suitable weldable plastic material, provided with small holes in a region which is covered, on the face towards the interior of the bag, with a filtering sheet which is compatible with polyethylene and weldable, characterised by high permeability by air, by high mechanical strength, and by high resistance to water, corrosive chemical products, moulds and rot.
  • a filtering sheet which is compatible with polyethylene and weldable, characterised by high permeability by air, by high mechanical strength, and by high resistance to water, corrosive chemical products, moulds and rot.
  • the sheet of Tyvek may have the same dimensions as the polyethylene sheet or may have different, smaller, dimensions, and may be fixed to the said sheet partly by one or more of the bag-defining and -sealing welds on the perimeter, and partly by its own welds.
  • the sheet of Tyvek sheet may be fixed to the said sheet partly by one or more of the bag-defining and -sealing welds on the perimeter, and partly by its own welds.
  • another polyethylene sheet also provided with small holes in the same region as the polyethylene sheet to which is fixed the Tyvek sheet, which may be in contact with the product contained in the bag or may be interposed between the two polyethylene sheets.
  • Tyvek sheet is located between the two polyethylene sheets and is fixed to these on at least two opposite sides by the bag-defining and -sealing welds on the perimeters, further specific fixing welds for the said Tyvek sheet may be dispensed with, since the pressure of the product contained in the bag will ensure a close contact of the said sheet with the polyethylene sheets and permit the sealing of the air removal holes of these sheets to prevent any leakage of the product.
  • At least one of the principal walls P1-P2 of the bag made in any way with a sheet of weldable material, normally polyethylene, with or without bellows, comprises a polyethylene sheet 1 provided with small holes 2 covered by a filtering sheet 3 located preferably on the inner face of the said sheet 1 and made of Tyvek or equivalent material.
  • the filtering sheet 3 acts as a filter to seal the holes 2 provided in sheet 1.
  • Sheet 1 imparts to the wall of the bag the necessary mechanical strength, which is difficult to obtain with sheet 3 alone which, being located inside the bag, is protected and may be of limited thickness, to improve the compatibility with the sheet 1 at the welding stage.
  • the wall P2 of the bag consists of a single sheet of polyethylene, for example with the same structural characteristics as those of the aforesaid sheet 1.
  • the sheet 3 Since the sheet 3 is rather expensive, there will be a tendency to use it in the smallest possible quantity. If the bag is of small dimensions, the sheet 3 may have the same extension as the sheet 1 and will be fixed to it as in Figure 3, with the bag-defining and -sealing welds S1-S2-S3-S4 on the perimeter. In bags of large dimensions, the sheet 3 may be of dimensions smaller than those of the sheet 1, as illustrated in the examples in Figures 4, 5 and 6.
  • sheet 3 contacts sheet 1 over the whole of its length but only over a part of its width, and is fixed to this sheet by the transverse bag-defining and -sealing welds S1-S2 and preferably also with its own longitudinal welds S5-S6 of the spot or, preferably, continuous type.
  • the position of the sheet 3 may be displaced with respect to the centre axis of the bag, as illustrated in the example in Figure 5 which has one of the longitudinal welds S5 resplaced by one of the perimeter welds S4 of the bag.
  • This variant enables one weld to be dispensed with and also has the advantage of locating the air-permeable region on one side of the bag, in a region where the bag is normally unobsturcted when stacked with other bags, so that the flow of air from the interior of the bag is facilitated.
  • the sheet 3 has a width equal to that of sheet 1 but has a smaller length, and may be located next to any or both of the edges of the said sheet, in such a way as to be fixed on three sides by the bag-defining and -sealing welds.
  • the fourth side of the sheet 3 will be fixed with its own weld S7.
  • the sheet 3 has dimensions smaller than the length and width of sheet 1 and may be located at any point of the perimeter of the latter sheet, for example in a corner region, in such a way as to be fixed to the latter sheet with one or more of the bag-defining and -sealing welds on the perimeter and with its own welds S8-S9.
  • the variant in Figure 8 has the Tyvek sheet 3 with the same dimensions as in the solution in Figure 7, but located at an intermediate point of the sheet 1 to which it is fixed with its own welds S8-S9-S10-S11.
  • this composite wall P1 may be formed by two polyethylene sheets 1-101 both provided with holes 2 in the same region sealed by the filter sheet 3, which last may be disposed in any way and fixed to either of the said sheets 1-101.
  • the outflow of air from the bag according to the invention may take place in a natural way be the effect of the pressure to which the bag is subjected when stacked with other bags, or may be caused by the temporary placing of the bag or of the portion of the bag provided with the holes 2, immediately after leaving the bag-filling machine, in an air removal device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Packages (AREA)
  • Filtering Materials (AREA)
EP92112068A 1991-07-24 1992-07-15 Sac en matière thermoplastique permettant l'échappement d'air Withdrawn EP0524539A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITGE910097 1991-07-24
ITGE910097A IT1253170B (it) 1991-07-24 1991-07-24 Sacco di materia termoplastica, adatto per consentire la fuoriuscita dell'aria incorporata dal prodotto insaccato.

Publications (1)

Publication Number Publication Date
EP0524539A1 true EP0524539A1 (fr) 1993-01-27

Family

ID=11354106

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92112068A Withdrawn EP0524539A1 (fr) 1991-07-24 1992-07-15 Sac en matière thermoplastique permettant l'échappement d'air

Country Status (2)

Country Link
EP (1) EP0524539A1 (fr)
IT (1) IT1253170B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5553942A (en) * 1994-03-11 1996-09-10 Robert Bosch Gmbh Laminate for producing packaging containers
WO2000007894A1 (fr) * 1998-08-07 2000-02-17 General Mills, Inc. Reservoir servant a contenir des particules fines
WO2000021848A1 (fr) * 1998-10-09 2000-04-20 General Mills, Inc. Contenant destine au stockage de particules fines
US8083411B2 (en) * 2006-12-18 2011-12-27 Bischof + Klein Gmbh & Co. Kg Packaging in the form of a bag
JP2016132481A (ja) * 2015-01-21 2016-07-25 凸版印刷株式会社 米袋包材

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1169280A (en) * 1967-05-26 1969-11-05 British Visqueen Ltd Plastics bags
DE1908440A1 (de) * 1969-02-20 1970-09-10 Osthushenrich Kg Sack,insbesondere Ventilsack
US4310118A (en) * 1979-08-10 1982-01-12 C. I. Kasei Co. Ltd. Packaging bags for powdery materials
EP0136859A2 (fr) * 1983-10-06 1985-04-10 C-I-L Inc. Sac en matière thermoplastique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1169280A (en) * 1967-05-26 1969-11-05 British Visqueen Ltd Plastics bags
DE1908440A1 (de) * 1969-02-20 1970-09-10 Osthushenrich Kg Sack,insbesondere Ventilsack
US4310118A (en) * 1979-08-10 1982-01-12 C. I. Kasei Co. Ltd. Packaging bags for powdery materials
EP0136859A2 (fr) * 1983-10-06 1985-04-10 C-I-L Inc. Sac en matière thermoplastique

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5553942A (en) * 1994-03-11 1996-09-10 Robert Bosch Gmbh Laminate for producing packaging containers
WO2000007894A1 (fr) * 1998-08-07 2000-02-17 General Mills, Inc. Reservoir servant a contenir des particules fines
US6120817A (en) * 1998-08-07 2000-09-19 General Mills, Inc. Container for storing fine particles
US6378272B1 (en) 1998-08-07 2002-04-30 General Mills, Inc. Method of making a container for storing fine particles
WO2000021848A1 (fr) * 1998-10-09 2000-04-20 General Mills, Inc. Contenant destine au stockage de particules fines
US6132780A (en) * 1998-10-09 2000-10-17 General Mills, Inc. Container for storing fine particles
US8083411B2 (en) * 2006-12-18 2011-12-27 Bischof + Klein Gmbh & Co. Kg Packaging in the form of a bag
JP2016132481A (ja) * 2015-01-21 2016-07-25 凸版印刷株式会社 米袋包材

Also Published As

Publication number Publication date
ITGE910097A0 (it) 1991-07-24
IT1253170B (it) 1995-07-10
ITGE910097A1 (it) 1993-01-24

Similar Documents

Publication Publication Date Title
CA1114784A (fr) Contenant
US4485133A (en) Oxygen absorbent packaging
FI120969B (fi) Polymeerikankaasta, erityisesti polyolefiinikankaasta muodostuva pussi ja menetelmä sen valmistamiseksi
FI105793B (fi) Säiliöpussi ja menetelmä sen valmistamiseksi
US6991109B1 (en) Vacuum sealable bag apparatus and method
EP0733353A2 (fr) Poche à deux chambres et sa méthode de fabrication
US20080152267A1 (en) Vacuum sealable bag apparatus and method
US7143910B2 (en) Easy opening sealed containment and dispensing package
NZ209507A (en) Thermoplastic valve bag:perforated outer wall with mesh inner liner
JPH0680149A (ja) 柔軟な袋状入れ物
EP0524539A1 (fr) Sac en matière thermoplastique permettant l'échappement d'air
JP4142775B2 (ja) 粒状物用袋、及びその製造方法
JP2001354274A (ja) 透湿防水包装用材料および包装体
JP5139640B2 (ja) 包装用袋
KR890005114Y1 (ko) 흡습제용 포대
JPH10114370A (ja) 穀類収納袋及び脱気袋に収容された米並びにこの袋を用いた米充填における脱気方法
JPH0242734B2 (fr)
AU2019101545A4 (en) A vented tube for use in the packaging of powdery or granular products
JP2005170396A (ja) 包装袋、その製造方法及び部材の溶着方法
JP2020063092A (ja) 逆止弁付き米袋
JPH0219406Y2 (fr)
JP4313659B2 (ja) 包装袋及びその製造方法
JP2011006156A (ja) 液体注出ノズルおよびそれを用いた包装袋ならびに包装袋の使用方法
KR860003057Y1 (ko) 산소 흡수제가 포함된 포장체
JP7426268B2 (ja) 袋詰め体

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): CH DE ES FR GB LI NL

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: 19930728