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
  • B65D88/00—Large containers
  • B65D88/16—Large containers flexible
  • B65D88/1612—Flexible intermediate bulk containers [FIBC]
  • B65D88/1618—Flexible intermediate bulk containers [FIBC] double-walled or with linings
• • 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
  • B65D88/00—Large containers
  • B65D88/16—Large containers flexible
  • B65D88/1612—Flexible intermediate bulk containers [FIBC]
  • B65D88/1675—Lifting fittings
  • B65D88/1681—Flexible, e.g. loops, or reinforcements therefor

Definitions

• the present invention relates to a so-called big bag or bulk sack which is intended for the storage and transport of bulk ma ⁇ terials and which comprises a bottom, which, along its edges, is joined to the material forming the side walls of the sack, the sack being provided with at least one lifting device for lifting thereof.
• Bulk sacks of the type mentioned by way of introduction are previously known in the art and these are, as a rule, sewn together from a large number of smaller pieces.
• the lifting loops or eyes with which the sacks are often equipped are usually provided in such a manner that broad, woven strips are sewn in along the corners of . he sack so that, thereby, there will be formed a lifting eye at each corner.
• this design and location of the lifting eyes entails that the openings of the lifting eyes will be directed in such a manner that it is not possible to insert a lifting fork on, for instance, a fork-lift truck in a direction which is parallel with two side edges of the sack. Instead, the lifting fork must, with this location of the lifting eyes, be inserted in along directions which are parallel with diagonals of the sack.
• the object of the present invention is to realise a bulk sack of the type mentioned by way of introduction, the bulk sack being designed in such a manner as to obviate the above-outlined drawbacks inherent in prior art constructions.
• the present invention has for its object to realise a bulk sack which is simple and economical in manufacture, which requires but a few seams for its assembly and which consists of an extremely limited number of parts.
• the present invention further has for its object to realise a sack in which there is no possibility of foreign matter and dirt accompanying the contents of the sack when this is emptied, if the sack is punctured or ruptured at the bottom.
• the present invention has for its object to devise a sack which is constructed in such a man ⁇ ner that no point loadings occur in the lifting eyes of the sack or their anchorages to the sack, and in which the lifting eyes may, in principle, be of the same mechanical strength as the sack in total.
• the present invention also has for its object to realise a sack in which the " lifting eye or lifting eyes are placed in such a manner that they will be parallel with opposing side edges of the bottom of the sack.
• the sack intimated by way of introduction is charac ⁇ terised in that a connecting portion is disposed to unite, at the upper portion of the sack, two opposingly located side walls or portions hereof, the connecting portion being arranged to form the lifting device; and that there is provided, at the lower ends of the connecting portion, at least one member which at least partially closes the sack in an upward direction.
• the member at least partially closing the sack in an upward di ⁇ rection is suitably designed as an upper filling nozzle formed of two top pieces of fabric or sheet material, each provided with one longitudinal side, the longitudinal sides being of lengths which ap ⁇ proximately coincide with the width of the connecting portion and being each secured in a transitional region between each respective side wall and the connecting portion, the top pieces being each pro ⁇ vided with two short sides which make an acute angle with the inter- jacent longitudinal side, and registering short sides on both of the top pieces being interconnected.
• the bottom of the sack is pro ⁇ vided with two opposing sides which are approximately parallel with an opening plane to the lifting device.
• Fig. 1 shows a bulk sack in two directions at right angles to one another, the bulk sack being pro- vided with but a single suspension, or lifting eye
• Fig. 2 shows a bulk sack similar to that of Fig. 1, but provided with two suspension, or lifting eyes
• Fig. 3 is a top plan view of the sack according to Fig. 1
• Fig. 4 is a top plan view of the sack according to Fig. 2;
• Fig. 5 shows a sack according to Fig. 1 under manu ⁇ facture, the bottom of the sack having been omitted;
• Fig. 6 shows a sack according to Fig. 1 in a view cor ⁇ responding to that of Fig. 5, but in a slightly modified embodiment
• Fig. 7 shows a sack according to Fig. 2 under raanu- facture, in a view corresponding to that of
• Fig. 5; and Fig. 8 shows a sack according to Fig 2 under manu ⁇ facture, but in a slightly modified embodiment.
• the sack illustrated in Figs. 1 and 3 is a so-called big bag or bulk sack which is employed for the storage and transport of bulk goods.
• a sack may be of con- siderable size, for example with an accommodation space of 1.5 m 3 and, therefore, may be subjected to considerable loadings if the contents of the sack are of high density.
• the sack according to Fig. 1 has a bottom 1 produced from the above-mentioned type of fabric or sheet material, the bottom being, along its edges, securely sewn in the side walls 2 of the sack.
• the stitching seam is intimated in the Figures by broken lines 22.
• the bottom is square or rectangular in configuration, but other configurations are also conceivable, such as a round bottom, an elliptical bottom or the like.
• the side walls 2 are provided with two vertically ex ⁇ tending seams 21 which will be described in greater detail below.
• the sack according to Figs. 1 and 3 is provided with a lifting device in the form of a lifting eye 3.
• the sack is provided with a fil ⁇ ling nozzle 4 whose design will be described more closely below.
• the upper end of the filling nozzle 4 is drawn out through one of the openings 5 through which a lifting hook 6 may be passed on lifting of the sack.
• the filling nozzle is in the position shown in Fig. 1, the sack is filled in a suitable manner, it being intimated by broken lines 7 how the filling nozzle connects interiorly in the sack to the side walls thereof.
• the interior of the sack, including the lower region of the filling nozzle will form an upwardly tapering space, which is advantageous in view of the fact that the material for which the sack is normally used is a material which displays a marked settling angle. This implies that, because of its upwardly tapering configu ⁇ ration, the sack can be filled completely without the use of vibra- tors or similar auxiliary equipment.
• the mouth of the filling nozzle 4 is closed, for example by being quite simply throttled with a knot. Thereafter, the protruding portion of the filling nozzle may be pushed back in through the opening 5 and lie protected and concealed beneath the lifting eye 3 proper. In this state of the sack, the greater part of both of the openings 5 will be free, for which reason, for instance, the lifting fork on a fork lift truck may readily be inserted in through the openings for lifting the sack. If the sack is employed using an inner sack (not shown on the Drawings), the mouth portion of the inner sack is raised up into the filling nozzle 4, so that the inner sack may readily be filled.
• the sack After filling, the sack is sealed in that the filling nozzle 4, with the mouth portion of the inner sack, is drawn together and sealed, for example by being throttled in a knot with a suitable tape.
• the inner sack will be closed and, in addition, the space between the inner sack and the outer sack or jacket will also be closed, which is important as regards preventing dirt which has ac ⁇ cumulated between the two sacks from falling down into the contents when the sack is emptied by being punctured or ruptured in the bot ⁇ tom.
• the sack illustrated in Figs. 2 and 4 is of the same funda ⁇ mental design and construction as the sack according to Figs. 1 and 3, but differs therefrom in that it is provided with two lifting eyes 3.
• lifting eyes are mutually parallel and are spaced apart by the intermediary of a recess 8 through which the filling nozzle 4 may be drawn up. Also in this embodiment, the interior of the sack tapers upwardly, for which reason filling may readily be effected without the need of auxiliary equipment.
• FIG. 5 shows a sack according to Figs. 1 and 3 in the semi ⁇ manufactured state. It will be apparent from this Drawing Figure that the sack consists of a piece of fabric or sheet materialwhich, along its opposing longitudinal edges, is provided with strength ⁇ ening edges 9. In the state as illustrated in Fig. 5, thesack con- sists of an elongate, rectangular, continuous piece of fabric or sheet material, and this piece may conceivably be composed of three parts, namely a wall portion 10 at each end and a connecting portion 11 therebetween.
• the width of the wall portions 10 corresponds to half of the circumference of the lower portion of the sack, and each one of these wall portions will form two side walls 2 in connection with one another.
• the seams which, in the finished state of the sack, connect these pairs of side walls are disposed along the s rengthening edges 9 and are shown in Figs, land 2 at reference numeral 21.
• top pieces 13 are securely sewn as marked by reference numeral 12, the top pieces lying superjacent both of the wall portions and being intended to form the filling nozzle 4 or the upper defining wall of the sack.
• the top pieces 13 may be in the form of approximately a trapezium, the longest parallel side, longitudinal side 14, being of a length which approximately coincides with the width of the connecting portion 11.
• the top pieces 13 are further provided with two short sides 15 which, in the illustrated embodiment, constitute the non-parallel sides of the trapezium. These short sides suitably make an acute angle with the longitudinal side, in which event the angle may lie between approximately 90° and down to an angle of the order of mag ⁇ nitude of 20-30°.
• the connecting portion 11 is folded so that the two top pieces 13 will lie against one another and cover one another.
• the short sides 15 lying against one another are joined together, preferably sewn, while, on the other hand, the shorter parallel side of the top pieces is left unsewn.
• the entire sack is folded double so that the strengthening edges 9 on both of the wall portions 10 will lie against one another, in which instance both of the top pieces 13 will be located in between the wall por ⁇ tions 10.
• the strengthening edges are sewn together along the edges of the wall portions 10 with seams 21, while on the other hand the stengthening edges along the con- necting portion 11 are left free.
• the sack On completion of these seams, the sack is in tubular form which, at the top, is closed by a connecting portion forming approx ⁇ imately a 'U 1 , while the sack is still open downwardly. Closure of the sack downwardly is realised in that its bottom 1 is sewn in, with the seams 22, along the edges 16 on the wall portions 10. In such instance, it is ensured that the bottom will be oriented in such a manner that two of its opposing sides are parallel with the strengthening edges 9 along the connecting portion 11. Hereby, the lower ends of the side seams 21 will also terminate at the central points on two opposing sides of the bottom 1.
• the connecting portion 11 is employed, and this is compressed from the sides approximately ac ⁇ cording to the arrows A-A in Fig. 5 so that the connecting portion 11 will form a handle for the bulk sack.
• the central portion of this handle or lifting eye is provided with a wrapping 17 which holds to ⁇ gether the connection portion.
• Fig. 5 will have a very robust lifting eye which may possibly be experienced as clumsy. Consequently, Fig. 6 shows a slightly modified embodiment in which the strengthening edges along the connecting portion have been cut away so that, in ⁇ stead of oppositely located edges, there will be formed waists 18 thereon. Otherwise, the sack is designed in the same manner as de ⁇ scribed with reference to Figs. 1, 3 and 5.
• the sack according to Figs. 2 and 4 is shown as a semi- manufacture in Fig. 7 and it will be apparent that there is pro ⁇ vided, in the connecting portion 11, a longitudinal slit 19 which is of such length that it does not quite extend up to the both trans ⁇ verse seams 12 between the top pieces 13 and the connecting portion 11.
• the sack has been described above as being produced in one piece as regards both of the wall portions 10 and the connecting portion 11. However, there is nothing to prevent the connecting por ⁇ tion 11 from being in a separate piece which is joined together partly with the both wall portions 10 and partly with the both top pieces 13, in that a common seam 12 is realised to this end. Naturally, the above-disclosed wrapping 17 may also be replaced by other suitable cohesion means. Thus, there should be nothing to prevent the lifting eyes 3 from being compressed, under the appli ⁇ cation of glue, that they are sewn together, or that they are mutu ⁇ ally united by other suitable means. ⁇

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
• Bag Frames (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20369209

Family Applications (1)

Country Status (2)

Cited By (5)

Families Citing this family (1)

Citations (4)

• 1987
  • 1987-07-31 SE SE8703017A patent/SE460961B/sv not_active Application Discontinuation
• 1988
  • 1988-08-01 WO PCT/SE1988/000390 patent/WO1989000957A1/en unknown

Patent Citations (4)

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