EP0454410A2 - Machine pour former les sacs - Google Patents

Machine pour former les sacs Download PDF

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Publication number
EP0454410A2
EP0454410A2 EP91303619A EP91303619A EP0454410A2 EP 0454410 A2 EP0454410 A2 EP 0454410A2 EP 91303619 A EP91303619 A EP 91303619A EP 91303619 A EP91303619 A EP 91303619A EP 0454410 A2 EP0454410 A2 EP 0454410A2
Authority
EP
European Patent Office
Prior art keywords
fabric
fold
along
web
shaft
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.)
Ceased
Application number
EP91303619A
Other languages
German (de)
English (en)
Other versions
EP0454410A3 (en
Inventor
John Dalton Griffith
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.)
Griffith Textile Machines Ltd
Original Assignee
Griffith Textile Machines 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 Griffith Textile Machines Ltd filed Critical Griffith Textile Machines Ltd
Publication of EP0454410A2 publication Critical patent/EP0454410A2/fr
Publication of EP0454410A3 publication Critical patent/EP0454410A3/en
Ceased legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B13/00—Machines for sewing sacks
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B33/00—Devices incorporated in sewing machines for supplying or removing the work

Definitions

  • the present invention relates to a bag forming machine and in particular to a machine for forming bags from a leno weave fabric.
  • Such bags are commonly used to store agricultural products for example vegetables. These bags are usually formed by folding fabric to form two superimposed layers which are then seamed along one side edge and one end edge.
  • Machines for folding the fabric are known but the folded fabric is then manually seamed on a conventional sewing machine.
  • a bag forming machine including folding means for folding a web of fabric to form two superimposed layers of fabric joined along one side by a fold, holding means for holding the folded fabric along the side edge opposite the fold, severing means for severing the folded fabric from the web of fabric material, and sewing means for seaming the folded fabric along the edge opposite said fold and along one end edge extending between fold and said side edge.
  • the folding means comprises at least one folding arm extending transversely of the path of feed of said web material, the folding arm being mounted on a shaft and being arranged parallel thereto, the shaft including gripping means, preferaby comprising at least one row of pins, for gripping an end edge of the web fabric such that rotation of the shaft causes the folding arm to move about a circular path to engage the web fabric and then on continued movement along the circular path of travel to simultaneously fold and draw the web fabric to form two superimposed layers of fabric and also bring a transverse portion of the fabric into contact with the shaft for severance.
  • gripping means preferaby comprising at least one row of pins
  • At least one pair of diametrically opposed folding arms are provided.
  • the holding means preferably comprises a support arm located parallel to the shaft axis and arranged to move from a remote location whereat it lies outside said circular path of travel to a fabric engaging position adjacent to said shaft, the support arm including fabric gripping means, preferably in the form of pins, for gripping the fabric during severance and preferably seaming.
  • the severance means comprises an electric heater such as a heater wire which extends along the shaft to engage said transverse fabric portion, the holding means preferably being arranged so that during its movement from the fabric engaging position to the seaming position, it moves the fabric into contact with the heater wire and also the gripping means on the shaft.
  • an electric heater such as a heater wire which extends along the shaft to engage said transverse fabric portion
  • the seaming means comprises two sewing machines, one sewing machine being arranged to travel in the same direction and the other sewing machine being arranged to travel in a transverse direction to said shaft for seaming the end edge.
  • a bag or container 100 produced by a machine according to the present invention is illustrated schematically in Figure 2.
  • the bag 100 is formed from a length of material preferably a woven fabric such as leno weave, which is folded to form two superimposed layers 101,102 joined by a fold 103.
  • the layers 101,102 are seamed together along one side edge 104 opposite the fold 103 and along one end edge 105 to form the bag.
  • the material of the bag is folded and cut from a web of material and then sewn along the two edges by the machine according to the present invention.
  • the machine according to the present invention is schematically shown in Figures 3 and 4.
  • the machine includes folding means 60 which comprise a pair of folding arms or paddles 10 and 11 which are attached to a central shaft 13 by radial arms 14 and are radially adjustable along the arms 14 to allow different widths of bag to be folded.
  • the shaft 13 is rotatable about an axis 12 and the paddles 10,11 are arranged to be generally parallel to the axis 12. On rotation of the shaft 13 the paddles travel along a circular path.
  • the web of fabric 66 is fed to the folding means in a direction perpendicular to axis 12 so that on rotation of shaft 13 the paddles serve to fold the material 15.
  • the shaft 13 includes gripping means, preferably in the form of a row of pins 16 which serve to hold an end edge of the web 66 during the folding operation.
  • Severing means 70 preferably in the form of heater wires 17 which extend along the length of the shaft 13 and are secured at each end thereto. Electricity is supplied to the wire 17 supplied via slip rings (not shown).
  • Fabric holding means 80 are provided which serve to hold the side edges 104 in a suitable condition for seaming after severance of the folded fabric from the web 66.
  • the holding means 80 comprises fabric gripping means preferably in the form of a row of pins 20 attached to a support arm or plate 21 which is pivoted about axis 22 via arms 23 and bar 24.
  • a fabric release plate 25 (figure 5) is hinged about axis 26 on bar 24 so that it can be moved to position 25(a) to eject the material from pins 20 after the seaming operation.
  • a bag ejection means 90 is preferably provided for ejecting a completed bag from the machine.
  • the ejection means preferably comprises a continuously rotating wheel 30 which is rotated about axis 31, and made resiliant typically by making it up as a circular brush with stiff radial bristles.
  • the brush 30 is located adjacent to the circular path of movement travelled by the paddles 10,11 so that when a paddles moves adjacent the brush the folded edge 103 comes into contact with the bristles and they eject the completed bag from the paddle.
  • seaming along the side edge 104 and the end edge 105 is done by sewing machines 40 and 41 respectively.
  • the machines are moved along rails 42, 43, typically supported and guided by grooved rollers 44.
  • the sewing machines preferably incorporate conventional folding attachments (not shown) to form a folded over hem while sewing.
  • the holding means 80 moves to a seaming position whereby it has removed the edges 104 from shaft 13 and presented them to a position adjacent to the path of travel of the sewing machines.
  • the geometry between the pivot axis 22, distance of holding bar 24 from axis 22, distance between axis 22 and that of shaft 13, and the distance between folding arms 10,11 and shaft 13 is chosen so that for the maximum width of bag to be produced, the folded material is held in a tight manner between a folding arm and the holding bar 24 during the seaming operation. This is particularly advantageous for achieving satisfactory seaming along the end edge 105 by sewing machine 41.
  • each arm 10,11 with an outwardly biased pivoted finger 10 a (shown only in Figure 4a in broken lines) which is located adjacent to the terminal end of the arm 10,11 for internal engagement with the folded edge 103.
  • Sewing machines 40 and 41 are then traversed along their rails to seam edges 104 and 105 together (Figure 4c).
  • the arm 21 is then raised further to cause a lever (not shown) to hit a stop and cause the plate 25(a) to pivot and thereby eject the fabric from the pins 20 ( Figures 3 and 4d).
  • paddle 10 moves along its circular path to put the folded edge 103 of the bag into the path of the ejector wheel 30 which throws the finished bag from the paddle and onto a heap at the side of the machine.
  • the sewing machines are then returned to their original positions (Figure 4a). The cycle of operations is then repeated, this time with paddle 11 folding the next piece of material.
  • the shaft 13 is intermittently rotated typically by a servomotor.
  • the bar 23 is oscillated typically by a cam deriving motion from the shaft 13.
  • the sewing machines are traversed typically by servomotors, acting through racks and pinions, and the sewing machines driven by separate motors or via clutches from the traverse motors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP19910303619 1990-04-24 1991-04-23 Bag forming machine Ceased EP0454410A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909009143A GB9009143D0 (en) 1990-04-24 1990-04-24 Bag forming machine
GB9009143 1990-04-24

Publications (2)

Publication Number Publication Date
EP0454410A2 true EP0454410A2 (fr) 1991-10-30
EP0454410A3 EP0454410A3 (en) 1992-05-27

Family

ID=10674884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910303619 Ceased EP0454410A3 (en) 1990-04-24 1991-04-23 Bag forming machine

Country Status (2)

Country Link
EP (1) EP0454410A3 (fr)
GB (1) GB9009143D0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018073233A1 (fr) * 2016-10-17 2018-04-26 Reused Remade Ab Procédé et système de fabrication d'une pluralité de sacs et sac

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2845885A (en) * 1957-01-25 1958-08-05 Scarrone Alfredo Ruben Sewing machine for burlap bags
US3099234A (en) * 1959-05-02 1963-07-30 Spinnerei Und Webereien Zell S Manufacture of baglike structures
US3227118A (en) * 1963-11-21 1966-01-04 Riegel Textile Corp Mechanism and method for automatically producing pillow cases, bags, and the like
US3227119A (en) * 1964-10-30 1966-01-04 Riegel Textile Corp Mechanism for automatically producing pillow cases, bags, and the like
US3385493A (en) * 1964-03-02 1968-05-28 Deering Milliken Res Corp Apparatus to control the speed of a fabric handling machine
DE1485208A1 (de) * 1964-01-16 1969-07-17 Hans Leuze Waeschefabrik Gewebeschlauch
US3901112A (en) * 1971-06-14 1975-08-26 Krantz H Fa Apparatus for severing moving webs
US3940084A (en) * 1973-08-16 1976-02-24 William Richard Leahy Measuring and cutting machine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2845885A (en) * 1957-01-25 1958-08-05 Scarrone Alfredo Ruben Sewing machine for burlap bags
US3099234A (en) * 1959-05-02 1963-07-30 Spinnerei Und Webereien Zell S Manufacture of baglike structures
US3227118A (en) * 1963-11-21 1966-01-04 Riegel Textile Corp Mechanism and method for automatically producing pillow cases, bags, and the like
DE1485208A1 (de) * 1964-01-16 1969-07-17 Hans Leuze Waeschefabrik Gewebeschlauch
US3385493A (en) * 1964-03-02 1968-05-28 Deering Milliken Res Corp Apparatus to control the speed of a fabric handling machine
US3227119A (en) * 1964-10-30 1966-01-04 Riegel Textile Corp Mechanism for automatically producing pillow cases, bags, and the like
US3901112A (en) * 1971-06-14 1975-08-26 Krantz H Fa Apparatus for severing moving webs
US3940084A (en) * 1973-08-16 1976-02-24 William Richard Leahy Measuring and cutting machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018073233A1 (fr) * 2016-10-17 2018-04-26 Reused Remade Ab Procédé et système de fabrication d'une pluralité de sacs et sac

Also Published As

Publication number Publication date
GB9009143D0 (en) 1990-06-20
EP0454410A3 (en) 1992-05-27

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