EP1190949A1 - Schiebeverschlusshülse für Umreifungen - Google Patents

Schiebeverschlusshülse für Umreifungen Download PDF

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Publication number
EP1190949A1
EP1190949A1 EP00308250A EP00308250A EP1190949A1 EP 1190949 A1 EP1190949 A1 EP 1190949A1 EP 00308250 A EP00308250 A EP 00308250A EP 00308250 A EP00308250 A EP 00308250A EP 1190949 A1 EP1190949 A1 EP 1190949A1
Authority
EP
European Patent Office
Prior art keywords
seal
base portion
width
strapping
strap
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Withdrawn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
EP00308250A
Other languages
English (en)
French (fr)
Inventor
Peter Walter Ronald Oseland
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.)
ITW Ltd
Original Assignee
ITW 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 ITW Ltd filed Critical ITW Ltd
Priority to EP00308250A priority Critical patent/EP1190949A1/de
Publication of EP1190949A1 publication Critical patent/EP1190949A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/24—Securing ends of binding material
    • B65B13/34—Securing ends of binding material by applying separate securing members, e.g. deformable clips
    • B65B13/345—Hand tools
    • 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
    • B65D63/00—Flexible elongated elements, e.g. straps, for bundling or supporting articles
    • B65D63/02—Metallic straps, tapes, or bands; Joints between ends thereof
    • B65D63/06—Joints produced by application of separate securing members, e.g. by deformation thereof

Definitions

  • This invention relates to seals for use in fastening the two ends of a length of strapping material around a load and in particular to push-type seals for use with steel strapping which is placed under high tension around a load prior to fastening the two ends.
  • strapping is conventionally wound around the load and tensioned prior to the ends of the strapping being fastened together.
  • the strapping may be a plastics or steel material and the fastening may be accomplished by welding or alternatively a seal may be applied around the two free ends of the strap and then the seal and strapping may be crimped, notched or in some other way deformed to securely lock the strap ends together.
  • the seals are usually formed from a short length (up to around 60mm long) of metal having a substantially flat rectangular base section adapted to sit adjacent a surface of the strap with leg portions or flanges extending from opposite sides of the base which are adapted to wrap around the overlapped strapping ends.
  • the seals may either be "open” or "closed". In an open seal the flanges protrude away from the base to allow the seal to be fitted over the strap after it has been tensioned and is ready for sealing. In a closed seal the flanges extend outward from the base but then curve back and overlap each other to form a flattened tubular or sleeve-like shape so that the strapping ends must be threaded into the closed seal prior to tensioning.
  • seals There are a number of known specialised types of seal which are either open or closed. Examples of the open seal types are “Snap-on” and “Open flange” while “Thread-on” and “Push-type” are examples of closed seals. Depending on the particular requirements and shape of the load, one of these different seal varieties will be used. For example, Snap-on seals are predominantly used in situations where the strapping has already been wrapped around a load and tensioned. It is then necessary to attach the seal to the tensioned strap and therefore the seal must be of the open variety and there must be room between the strap and the load to allow the seal and strap to be subsequently deformed by a suitable tool.
  • Snap-on seals are effective for sealing loads having flat surfaces but are not suitable for sealing loads on non-flat surfaces such as the curved surfaces of steel coils.
  • Push-type seals are slipped onto the strapping before tensioning, they may be used to join strapping around curved surfaces such as steel coils.
  • Push-type seals suffer from occasional problems when the overlapping ends of the flanges interfere with each other during deformation thereby reducing the effectiveness of the seal.
  • An improvement in the strength of the junction formed between the seal and strapping would be advantageous.
  • the invention may therefore broadly be said to consist in a push-type seal for fastening together the ends of a tensioned strap which has been looped around an article, the seal adapted to be fed onto the strap in a direction parallel to the length of the strap prior to tensioning and fastening, the seal having a substantially rectangular base portion with a width marginally greater than the width of the steel strap and flange portions which extend outward from opposite side edges of the base portion and then turn back towards each other such that the flanges, together with the base portion, form a sleeve through which the strap ends may be inserted, the sleeve having a predetermined depth in a direction perpendicular to the base portion between the flanges and the base portion, characterised in that a gap is provided between the free ends of the flange portions wherein the width of the gap and the depth of the sleeve are such that once fed onto a strap and prior to fastening, the seal may only be removed from the strap in a direction parallel to the length of
  • the depth of the seal and the width of the gap between the free ends of the flanges are substantially the same.
  • the width of the gap between the free ends of the flange portions is between 10% to 40% of the width of the base portion.
  • the width of the gap between the free ends of the flange portions is about 20% of the width of the base portion.
  • the distance between one side edge of the base portion and the nearest point on the edge of the free end of the flange portion attached to the opposite side edge of the base portion is less than the width of the base portion.
  • the distance between one side edge of the base portion and the nearest point on the edge of the free end of the flange portion attached to the opposite side edge of the base portion is between 55% and 75% of the width of the base portion.
  • the distance between one side edge of the base portion and the nearest point on the edge of the free end of the flange portion attached to the opposite side edge of the base portion is about 65% of the width of the base portion.
  • fastening of the strap ends together is accomplished by deformation of the seal and/or the strap in the vicinity of the seal, said deformation resulting from forces including a compressive force acting against the two side edges, a gap between the free ends of the flange portions remaining after said deformation.
  • a seal such as a push-type seal 1 for use in fastening the two ends 7, 8 of strapping material 9 (such as plastics or more preferably steel strapping) is shown.
  • the seal is preferably formed from a metal such as steel and is made up of a substantially rectangular base portion 2 having a predetermined width (W) and two flange portions 3.
  • W predetermined width
  • the flange portions extend outwardly from opposite side edges (the "long side" edges) of the base portion but then curve back towards each other so that the free ends 4 of the flange portions face towards each other.
  • the base portion and flange portions together form a flattened tubular sleeve surrounding a longitudinal central region 5 having a predetermined depth (D).
  • a gap 6 having a predetermined width (W) is provided between the free ends 4 of the flanges 3.
  • the base portion 2 may be slightly convex.
  • the width (W) of the seal 1 is marginally greater than the width (S) of the strapping material for which it is intended to be used.
  • the width (W) could be around 5% to 10% greater than the width of its associated strapping material. This allows the strapping to easily be fed into the longitudinal central region 5.
  • the dimension (Z) indicated in Figure 1 is the distance from one side edge of the base portion 2 to the free end of the flange portion attached to the opposite side edge of the base portion.
  • the distance (Z) is the maximum width of (rigid) strapping 9 which may successfully be inserted or removed "edgeways" through the gap 6 to enter or leave the longitudinal. central region 5. An attempt to attach or detach the seal to the strapping by inserting an edge of the strapping material 9 through the gap 6 will be unsuccessful if its width is any greater than (Z).
  • the gap width (G) and the depth (D) of seal 1 are set to ensure that the seal may only be attached or detached from the strapping by relative longitudinal movement in the direction indicated by arrow 10 in Figure 3.
  • the width (W) of the seal is effectively set by the width of the available strapping (for example, 1.05*S to 1.10*S).
  • the dimension (Z) must be less than the strapping width (S)
  • the gap width (G) is influenced by external requirements and is therefore preset.
  • the size of the gap width (G) is made large enough to ensure that a small gap remains between the free ends of the flange portions after the seal has been fastened by deformation.
  • the gap width (G) is also preferably between about 10% to about 40% of the width (W) of the base portion. This of course assumes that the depth (D) is maintained at a sufficiently small distance to maintain the overall requirement in relation to seal attachment and removal. More preferably the gap width (G) is about 20% of the width (W) of the base portion.
  • the distance Z is between about 55% and 75% of the width (W) of the base portion 2. More preferably, Z is about 65% of the width (W) of the base portion 2.
  • a length of strapping material 9 is looped around an article A ( Figure 5) and the two ends of the strapping material are fed through the longitudinal central region 5 of seal 1 in the known way with the side of seal 1 including gap 6 closest to the article.
  • One end 8 of the strapping material 9 is then bent under the seal 1 while a tool 20 ( Figures 6 and 7) is used to tension the strapping by drawing the other end 7 of the strapping through the seal.
  • the operation of the tool 20 is conventional and more fully described in, for example, US-A-4289175 but for the present purposes it is sufficient to realise that the tool first clamps the strap end 7 between an anvil 21 and a rotatable strap tensioning feedwheel 22.
  • An abutment member 24 of the tool is positioned between the overlapped strapping portions and abuts against one end of seal 1.
  • the tool 20 may be pneumatically operated and includes a motor 23 which drives the feedwheel 22 thus drawing the end 7 of strapping 9 through seal 1 while the abutment member 24 is forced to push against the end of the seal which is held in place on the strapping by virtue of the bend formed near end 8 of the strapping.
  • the motor is stopped, retaining the developed tension in the strapping, while the seal is fastened to the strapping and the excess strapping severed by shearing unit 28.
  • a deformation unit 25 which engages and physically deforms the seal and the strapping within the longitudinal central region 5 of the seal.
  • the deformation unit 25 shown in Figures 6 and 7 is a pneumatically operated jaw assembly which crimps or notches the seal. During crimping or notching, two sets of co-operating jaw members 26a, 26b and 27a, 27b engage and physically deform the side edges of the flanges 3 and also the strapping within the seal.
  • the jaw members form a series of short sideways cuts through the seal and also through the strapping within the seal to produce a series of "cut out" sections 11, 12, 13 and 14 which are deformed upwards, towards the tool 20 by the jaw members 27a, 27b, 26a and 26b respectively as best seen in Figures 4 and 5.
  • the end 8 of the strapping which should be overlying the seal has been omitted for clarity.
  • the jaw members also compress and thereby reduce the width (W) of the seal but it will be noted that in Figure 4, after fastening, a gap 6 remains between the free ends of the flanges 3. If the flange ends were to overlap or in some way intersect during fastening then a deterioration in the seal strength would occur as the compressive force provided by the jaw members would encounter some resistance. Because a gap remains after fastening of the seal, the strength of the seal is maximised.
  • the above described seal is capable of producing joint strengths of greater than 90% of the strap strength. This is a major improvement on prior push-type seals. Furthermore, in comparison to prior push-type seals wherein the free ends of the flanges overlap, the seal according to the present invention produces a lower profile joint which is also advantageous.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
EP00308250A 2000-09-21 2000-09-21 Schiebeverschlusshülse für Umreifungen Withdrawn EP1190949A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00308250A EP1190949A1 (de) 2000-09-21 2000-09-21 Schiebeverschlusshülse für Umreifungen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00308250A EP1190949A1 (de) 2000-09-21 2000-09-21 Schiebeverschlusshülse für Umreifungen

Publications (1)

Publication Number Publication Date
EP1190949A1 true EP1190949A1 (de) 2002-03-27

Family

ID=8173278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00308250A Withdrawn EP1190949A1 (de) 2000-09-21 2000-09-21 Schiebeverschlusshülse für Umreifungen

Country Status (1)

Country Link
EP (1) EP1190949A1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR665039A (fr) * 1928-12-03 1929-09-13 Bilatte Et Cie E Pince spéciale servant à réunir les extrémités des bandes de feuillard sur les emballages, après tension, à l'aide de chapes ou agrafes
US2214109A (en) * 1937-03-01 1940-09-10 Acme Steel Co Strap joint and method of using same
US3034384A (en) * 1958-10-06 1962-05-15 Acme Steel Co Strap sealing tool
GB972290A (en) * 1959-12-28 1964-10-14 Signode Steel Strapping Co Ligature joining
US4289175A (en) 1979-11-13 1981-09-15 Signode Corporation Tension sensing mechanism for power-operated push-type strapping and sealing tool

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR665039A (fr) * 1928-12-03 1929-09-13 Bilatte Et Cie E Pince spéciale servant à réunir les extrémités des bandes de feuillard sur les emballages, après tension, à l'aide de chapes ou agrafes
US2214109A (en) * 1937-03-01 1940-09-10 Acme Steel Co Strap joint and method of using same
US3034384A (en) * 1958-10-06 1962-05-15 Acme Steel Co Strap sealing tool
GB972290A (en) * 1959-12-28 1964-10-14 Signode Steel Strapping Co Ligature joining
US4289175A (en) 1979-11-13 1981-09-15 Signode Corporation Tension sensing mechanism for power-operated push-type strapping and sealing tool

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