EP0400826A1 - Flexibler Behälter - Google Patents

Flexibler Behälter Download PDF

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Publication number
EP0400826A1
EP0400826A1 EP90305016A EP90305016A EP0400826A1 EP 0400826 A1 EP0400826 A1 EP 0400826A1 EP 90305016 A EP90305016 A EP 90305016A EP 90305016 A EP90305016 A EP 90305016A EP 0400826 A1 EP0400826 A1 EP 0400826A1
Authority
EP
European Patent Office
Prior art keywords
flexible container
adhesive
sack
closed
inner section
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.)
Granted
Application number
EP90305016A
Other languages
English (en)
French (fr)
Other versions
EP0400826B1 (de
Inventor
Gordon Chilmaid
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.)
MEDWAY PACKAGING Ltd
Original Assignee
MEDWAY PACKAGING Ltd
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
Priority claimed from GB898912372A external-priority patent/GB8912372D0/en
Priority claimed from GB898925146A external-priority patent/GB8925146D0/en
Application filed by MEDWAY PACKAGING Ltd filed Critical MEDWAY PACKAGING Ltd
Priority to AT90305016T priority Critical patent/ATE85287T1/de
Publication of EP0400826A1 publication Critical patent/EP0400826A1/de
Application granted granted Critical
Publication of EP0400826B1 publication Critical patent/EP0400826B1/de
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
    • 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
    • B65D75/5855—Peelable seals

Definitions

  • the present invention relates to a flexible container such as a sack and in particular, a paper sack.
  • a variety of means for dealing with this problem have been devised and a colon method is by means of sewing up a closed end of the sack utilising a tape and a particular form of stitching.
  • the stitching and tape are strong and will maintain the sack closed, but when it is desired to open the sack, the stitching may be grasped at a particular point and readily parted from the sack whereby the end of the sack opened.
  • European Patent Publication 283279 shows a sack with a releasable end closure in which a long extended end of the sack is folded over in a particular way to provide a "peak” which is taped down with an adhesive tape (the so-called “cap strip”).
  • cap strip an adhesive tape
  • Such an arrangement works quite well but in practice, has disadvantages.
  • One disadvantage is that a considerable extra length of material is required to form the closure which in the very competitive industry of paper sacks can be of considerable economic importance.
  • US Specification 2 363 957 discloses a envelope or container in which one end is closed by a folded over flap 30.
  • the flap 30 is adhered to the remainder of the envelope by adhesive under lobes 32 spaced towards each side of the envelope, leaving an unadhered portion between, and the actual opened end is sealed by means of releasable adhesive 37.
  • the releasable adhesive 37 forming the main closure of the open end of the envelope extends substantially to either side of the envelope.
  • the unadhered portion between the lobes 32 could allow dirt to collect beneath the flap which in the case of use of a container with food stuff such as flour is unacceptable.
  • the present invention provides a flexible container, (such as a sack, and in particular a paper sack), including a closed end, the closed end being formed by folding an open end edge, and joining means (such as adhesive, sewing) joining said folded end edge to the body of the flexible container, said joining means being arranged so as to join said folded end edge to said body more strongly over outer sections adjacent each side edge of said flexible container than over an inner section spaced from said side edges.
  • a flexible container such as a sack, and in particular a paper sack
  • joining means such as adhesive, sewing
  • the inner and outer sections should be contiguous and extend to the outer sides of the sack.
  • said inner section includes a loose edge so that fingers can be inserted under the loose edge to break the joining means at said inner section to thereby open said closed end of the flexible container.
  • the end closure may be closed at the outer and sinner sections by different adhesives, the adhesive at said outer sections being stronger than at said inner section.
  • An adhesive may be applied in the form of lines and there may be more lines per unit area at said outer section than said inner section so that said outer sections adhere more strongly.
  • a strip may be interposed at said inner section, said strip member including a strong adhesive on one side and a weaker adhesive on the other.
  • Figure 3 shows the back view of a sack 10.
  • the paper sack is for the storage and transportation of flour, but may be used for other purposes.
  • the paper material of the sack 10 may be multi-ply.
  • the paper sacks 10 are manufactured from a strip or strips of material(s) which is (are) folded over so that opposite longitudinal edges 12,13 overlap, the opposite longitudinal edges 12,13 being adhesively joined to one another to provide a joint 14.
  • the tubular member thereby produced is divided transversely by suitable cutting means to provide a succession of open ended tubes 10A, 10B from each of which a paper sack may be made.
  • the sack manufacturer closes a first end 16 of the open ended tubes 10A, 10B (as shown in Figure 2) to form sacks having a second, open, end 17 (as shown in Figure 3) and the user, having filled the sacks, closes the, second, open ends 17 of the sacks.
  • the first end 16 of a paper sack 10 is closed by folding an end portion 19 over a fold line 21, the fold line 21 being parallel to the cut open end 16 of the sack 10 and spaced therefrom.
  • the folded over end portion 19 is then connected to the body 22 of the sack 10.
  • the end portion 19 when folded over is adhesively attached to the body 22.
  • adhesive is applied to either the end portion 19 (at 25A) or the body 22 (at 250) just above the fold line 21 across the complete width from side 23 to side 24 of the sack 10.
  • the end portion 19 is divided into three sections, outer sections 26,27 extending from sides 23,24 inwardly towards the middle of the sack, and a inner section 28 which extends between the two outer sections 26,27.
  • outer sections 26,27 of the end portion 19 are more strongly adhered to the body 22 than the inner section 28 of the end portion 19.
  • a stronger adhesive may be applied over the outer sections 26,27 than over the inner section 28.
  • more lines of adhesive may be applied along the outer sections 26,27 than along the inner section 28.
  • the adhesive is not applied to the remote end of the end portion 19 (ie adjacent the cut edge 20) so that when the end portion 19 is folded over the fold line 21 and adhesively connected to the body 22, there is a small flap 31 left which may be grasped.
  • the sack in use, once the sack has been manufactured as described, it may be filled by the user with the relevant material and the second open end 17 closed as in the conventional manner.
  • the closure of the second open end 17 may be arranged in any manner, since it will remain closed thereafter and it is not necessary for it to be opened at that end.
  • the flap 31 of the end portion 19 (which as indicated above, may preferably not include adhesive so as to be grasped by the fingers of the hand), may be gripped along the inner section 28 and pulled so as to break open joint lines 36, 37 between the inner section 28 of the end portion 19 and the body 22.
  • the greater adhesion between the outer sections 26,27 and the body 22 will mean that they remain adhesively closed and so the end portion 19 will tear at the joint line 36 between the outer section 26 and inner section 28, and the joint line 37 between the inner section 28 and outer section 27.
  • Figure 4 shows the end 16 of the sack after it has been opened in this manner. Material from inside the sack may be poured out via the, now, open section 28.
  • Figure 5 shows a configuration of adhesive which may be used to provide the different strengths of adhesive over the outer and inner sections.
  • the end portion 19 and adjacent part of the body 22 is provided with adhesive of the thermal acting adhesive type, and heat is applied in the pattern shown. It will thus be seen that there is considerably greater proportion of active adhesive over the outer sections 26,27 than over the inner section 28 and indeed over the inner section 28 there is no adhesive adjacent the edge of the end portion 19 to provide the finger inserting flap 31.
  • FIG. 6 An alternative configuration is shown in Figure 6.
  • the end 16 is not provided by a single cut across the width of the tubular material as shown in Figure 1, but the plies of each side of the sack 10 are cut in a staggered manner.
  • Figure 6 which shows the sack in the configuration similar to that in Figure 2, that is before folding over of the end portion 19, it will be seen that the sack which in the Figure is a two ply material has free lengths of the opposite (ie from) outer ply 32A, the opposite inner ply 32B, the nearside (ie back) inner ply 33B and the nearside outer ply 33A.
  • Such an arrangement makes for stronger closed end.
  • the strip 34 may be arranged so that it does not have weak adhesive over its entire surface so that when the end portion 19 is folded over as shown in Figure 7, part of the strip 34 forms a pocket 31.
  • lines of weakness may be provided at the joints 36,37 extending parallel to the length of the sack 10 between the outer sections 26,27 and the inner sections 28. This helps the end portion 19 to rip open.
  • the sack 10 includes a plurality of plies 32A, 32B, 33A, 33B.
  • the change in the present arrangement is that whereas in the earlier Figure 6, (to which this arrangement generally corresponds) each of the plies was cut across its complete width in the form of a straight line, in the present case, the ply 32B includes two outermost portions 321 and 322 cut as before, and a central portion 323 cut so that it overlies the adjacent ply 32A and its cut edge may be contiguous with the cut edge of the ply 32A.
  • the two plies 32A, 32B When folded over about the line 21, in the area of the strip 34, the two plies 32A, 32B, overlie one another so that in this central area, there is added strength to the part of the sack which will be gripped and pulled to open the sack.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Packages (AREA)
  • Cartons (AREA)
EP90305016A 1989-05-30 1990-05-10 Flexibler Behälter Expired - Lifetime EP0400826B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90305016T ATE85287T1 (de) 1989-05-30 1990-05-10 Flexibler behaelter.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB898912372A GB8912372D0 (en) 1989-05-30 1989-05-30 Flexible container
GB8912372 1989-05-30
GB8925146 1989-11-07
GB898925146A GB8925146D0 (en) 1989-11-07 1989-11-07 Flexible container

Publications (2)

Publication Number Publication Date
EP0400826A1 true EP0400826A1 (de) 1990-12-05
EP0400826B1 EP0400826B1 (de) 1993-02-03

Family

ID=26295417

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90305016A Expired - Lifetime EP0400826B1 (de) 1989-05-30 1990-05-10 Flexibler Behälter

Country Status (3)

Country Link
EP (1) EP0400826B1 (de)
AT (1) ATE85287T1 (de)
DE (1) DE69000855D1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5983594A (en) * 1997-08-22 1999-11-16 Forman; Harold M Adhesively resealable package, method and apparatus
US6120184A (en) * 1999-11-17 2000-09-19 Stone Container Corporation Bag apparatus with reclosable pour spout
EP1046594A1 (de) * 1999-04-15 2000-10-25 Alusuisse Technology & Management AG Verpackungsbehälter mit abschälbarer Verbindungsnaht
US6315448B1 (en) * 1998-11-12 2001-11-13 Bemis Company, Inc. Multiwall bag with peelable opening
US6338572B1 (en) * 1998-12-07 2002-01-15 Southern Bag Corporation Easy open industrial bag
US6601990B2 (en) * 2001-03-28 2003-08-05 Showa Paxxs Corporation Paper bag

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2363957A (en) * 1942-12-02 1944-11-28 Brown Bag Filling Machine Comp Envelope or container
FR2150897A1 (de) * 1971-08-31 1973-04-13 Colgate Palmolive Co
US3827625A (en) * 1972-06-21 1974-08-06 Reclosable Package Corp Reclosable package and controlled release paper for use therein
US4483445A (en) * 1982-09-30 1984-11-20 Champion International Corporation Bag with easy opening closure and handle
US4512479A (en) * 1982-09-20 1985-04-23 Champion International Corporation Container with easy opening closure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2363957A (en) * 1942-12-02 1944-11-28 Brown Bag Filling Machine Comp Envelope or container
FR2150897A1 (de) * 1971-08-31 1973-04-13 Colgate Palmolive Co
US3827625A (en) * 1972-06-21 1974-08-06 Reclosable Package Corp Reclosable package and controlled release paper for use therein
US4512479A (en) * 1982-09-20 1985-04-23 Champion International Corporation Container with easy opening closure
US4483445A (en) * 1982-09-30 1984-11-20 Champion International Corporation Bag with easy opening closure and handle

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5983594A (en) * 1997-08-22 1999-11-16 Forman; Harold M Adhesively resealable package, method and apparatus
US6315448B1 (en) * 1998-11-12 2001-11-13 Bemis Company, Inc. Multiwall bag with peelable opening
US6478465B1 (en) * 1998-11-12 2002-11-12 Bemis Company, Inc. Multiwall bag with peelable opening
US6338572B1 (en) * 1998-12-07 2002-01-15 Southern Bag Corporation Easy open industrial bag
EP1046594A1 (de) * 1999-04-15 2000-10-25 Alusuisse Technology & Management AG Verpackungsbehälter mit abschälbarer Verbindungsnaht
US6120184A (en) * 1999-11-17 2000-09-19 Stone Container Corporation Bag apparatus with reclosable pour spout
WO2001036283A1 (en) * 1999-11-17 2001-05-25 Stone Container Corporation Bag apparatus with reclosable pour spout
US6328472B1 (en) 1999-11-17 2001-12-11 Stone Container Corporation Bag apparatus with reclosable pour spout
US6601990B2 (en) * 2001-03-28 2003-08-05 Showa Paxxs Corporation Paper bag

Also Published As

Publication number Publication date
DE69000855D1 (de) 1993-03-18
EP0400826B1 (de) 1993-02-03
ATE85287T1 (de) 1993-02-15

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