EP0618145A1 - Papiersäcke - Google Patents

Papiersäcke Download PDF

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Publication number
EP0618145A1
EP0618145A1 EP94301924A EP94301924A EP0618145A1 EP 0618145 A1 EP0618145 A1 EP 0618145A1 EP 94301924 A EP94301924 A EP 94301924A EP 94301924 A EP94301924 A EP 94301924A EP 0618145 A1 EP0618145 A1 EP 0618145A1
Authority
EP
European Patent Office
Prior art keywords
trapezium
sack
folds
shaped
flaps
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Withdrawn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
EP94301924A
Other languages
English (en)
French (fr)
Inventor
John Robert Burchell
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.)
Paper Sacks Ltd
Original Assignee
Paper Sacks 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
Application filed by Paper Sacks Ltd filed Critical Paper Sacks Ltd
Publication of EP0618145A1 publication Critical patent/EP0618145A1/de
Withdrawn legal-status Critical Current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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/04—Bags or like containers made of paper and having structural provision for thickness of contents with multiple walls
    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/08—Bags or like containers made of paper and having structural provision for thickness of contents with block bottoms

Definitions

  • This invention relates to multi-wall paper sacks - a multi-wall paper sack being defined for the purposes of this specification as one having one or more walls.
  • the sack embodying the invention is a two-sided sack, made accordingly from a two-sided paper tube A, one side B of which (the "face”, see Fig. 4) is joined directly to the other side C thereof (the "reverse side” or “seamed side", see Figs. 1 - 3) along two side edge folds D and E.
  • Figs. 1 - 3 show the seam F of the reverse, or seamed, side C.
  • the paper tube A is actually double walled, that is, formed by two separate paper tubes, one slightly smaller than, and inside, the other, but these two separate tubes are not shown as such.
  • the drawings depict the double-walled tube A as if it were a single-walled tube.
  • the bottom of the tube A is cut straight across with a "flush” cut, that is, with the bottom edges of the inner and outer tubes flush with each other and with the bottom edge G of the face B flush with the bottom edge H of the reverse side C.
  • Conventional paper sack-making machinery (not shown) is used to open-out and fold the paper tube A into the conventional, intermediate form shown in Fig. 1, with two mutually identical, trapezium-shaped flaps J and K.
  • the trapezium-shaped flap J is formed (wholly out of a part of the face B) by a trapezium-shaped panel J1, the edges of which extend between points a-b-c-d-g-h-a, and two halves J2 and J3 (those extending between points a-b-h-a and between points d-c-g-d) of two respective triangular panels L1 and L2, defined by points a-b-h-f-a and by points d-c-g-e-d respectively.
  • the trapezium-shaped flap K is formed (wholly out of a part of the reverse side C) by a trapezium-shaped panel K1, the edges of which extend between points a-f-e-d-g-h-a, and two halves K2 and K3 (those extending between points a-f-h-a and between points d-e-g-d) of the aforesaid two respective triangular panels L1 and L2.
  • the bases a-h-g-d of the two trapezium-shaped flaps J, K are closely adjacent each other.
  • panels L1 and L2 adjoin panel J1 along 45° folds i and j respectively and adjoin panel K1 along corresponding 45° folds k and I respectively.
  • the top of the tube A is shown in Figs. 1 and 2 as torn off from point m on side edge fold D to point n on side edge fold E. In Figs. 3 and 4 somewhat more is shown torn off between corresponding points m' and n'.
  • the two flaps J and K are mutually co-planar and could, unless inhibited, be pivoted about an axis a-h-g-d relative to the part of the tube A that extends up to points m and n from the aforesaid axis a-h-g-d.
  • no such pivoting has any chance of occurring in the sack-making machinery as the sack tube proceeds through the successive folding steps described herein.
  • edge portions G1-3, H1-3 border a rectangular area, defined by points b-c-g-e-f-h-b, which is actually an inside surface portion Bi of face B and an inside surface portion Ci of reverse side C and is in close contact with the flour when the sack is used; no adhesive must contact the flour, as mentioned earlier.
  • the next step is to fold flap J upwardly on fold O, as shown in Fig. 2.
  • This brings adhesive strips L and M into effective adhering contact with those parts of triangular panels L1 and L2 which are on the far side of fold O.
  • Bottom edge portion G3 is thereby brought closer to bottom edge portion H3, an aperture P being defined by the rectangle defined by points b-c-e-f-b.
  • next fold line Q is below bottom edge portion G3 but above points a and d as seen in Fig. 2. It will be observed that the inner ends M1, N1 of adhesive strips M and N project slightly across the fold line Q.
  • Figs. 3 and 4 illustrate the sack preform, if it may be called that by this stage, after the flaps J and K have been folded downwardly on fold Q and after a rectangular, fully pasted (i.e. adhesive-coated) paper sheet, or "end label", R has been applied over flap K.
  • the 45° folds i and k cross over at point q, whilst the 45° folds j and 1 cross over similarly at point r.
  • points a, q, r and d are in alignment with each other.
  • the label R is made to have a length q-r (that is, equal to the distance between points q and r) and a width equal to the distance between fold Q and edge portion H3, and is positioned accordingly to just touch points q and r and to be flush with fold Q and edge portion H3.
  • the fold Q is in the opposite direction to the fold 0.
  • Fig. 4 shows edge portions of flap K and label R projecting just below fold O.
  • the only exposed adhesive is on side edge portions R1 and R2 of label R, projecting to the sides of flap K. There is no adhesive on flap K.
  • the final step in forming the pasted bottom on the sack is to fold these projecting edge portions around fold O and stick down the side edge label portions R1 and R2.
  • Fig. 4 shows the final positions thereof in chain-dot lines, immediately above fold O. Given that the only adhesive is on portions R1, R2, it will be appreciated that a gap exists, or can be easily opened up, along edge portion H3 between points e and f, as shown at S, where one can insert one's hand and pull the edge portions open again to the state shown in full lines in Figs. 3 and 4, allowing the flour to be poured out of outlet aperture P.
  • the paper tube A from which the sack is made, is double-walled, so that the sack is also double-walled, the invention may be embodied in a single-walled paper sack or even a paper sack having three, or more, walls.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
EP94301924A 1993-03-18 1994-03-17 Papiersäcke Withdrawn EP0618145A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9305556A GB2276141B (en) 1993-03-18 1993-03-18 Paper sacks
GB9305556 1993-03-18

Publications (1)

Publication Number Publication Date
EP0618145A1 true EP0618145A1 (de) 1994-10-05

Family

ID=10732265

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94301924A Withdrawn EP0618145A1 (de) 1993-03-18 1994-03-17 Papiersäcke

Country Status (2)

Country Link
EP (1) EP0618145A1 (de)
GB (1) GB2276141B (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB880250A (en) * 1959-08-17 1961-10-18 Paper Sacks Ltd Improvements in and relating to multi-ply paper bags or sacks
FR2228680A1 (de) * 1973-05-10 1974-12-06 Windmoeller & Hoelscher

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB880250A (en) * 1959-08-17 1961-10-18 Paper Sacks Ltd Improvements in and relating to multi-ply paper bags or sacks
FR2228680A1 (de) * 1973-05-10 1974-12-06 Windmoeller & Hoelscher

Also Published As

Publication number Publication date
GB9305556D0 (en) 1993-05-05
GB2276141A (en) 1994-09-21
GB2276141B (en) 1996-07-31

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