US3527180A - Devices for transporting and feeding sacks and similar nonrigid containers into sewing machines for their sealing - Google Patents

Devices for transporting and feeding sacks and similar nonrigid containers into sewing machines for their sealing Download PDF

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Publication number
US3527180A
US3527180A US766576A US3527180DA US3527180A US 3527180 A US3527180 A US 3527180A US 766576 A US766576 A US 766576A US 3527180D A US3527180D A US 3527180DA US 3527180 A US3527180 A US 3527180A
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Prior art keywords
mouth
sack
sacks
conveyor
belts
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US766576A
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English (en)
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Renzo Giuseppe Cerioni
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Individual
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    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41H—APPLIANCES OR METHODS FOR MAKING CLOTHES, e.g. FOR DRESS-MAKING OR FOR TAILORING, NOT OTHERWISE PROVIDED FOR
    • A41H43/00—Other methods, machines or appliances
    • A41H43/02—Handling garment parts or blanks, e.g. feeding, piling, separating or reversing
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B13/00—Machines for sewing sacks

Definitions

  • the device comprises two sets of conveyors in sequence, with swingable mounting of the initial conveyor a [51] Int.C1à [50] FieldofSearch...........................................
  • An object of the present invention is also the devices produced and operated in applying the said improvement, and whose characteristics will be specified below.
  • the object of this invention is the provision ofimproved devices which eliminate the above mentioned and other drawbacks which present themselves during operation of apparatus ofthe type and for the uses considered.
  • the object of this invention is the provision of improved devices which include those means and operating under those conditions which ensure that the engagement of the mouth of the sack over the whole of its length and the transporting of the mouth into the sewing machine is effected before the operator abandons the sack, or before the withdrawal from the said mouth of the rods of the apparatus used for gripping and stretching.
  • the improved device consists of a transporting system which includes at least two pairs of counter-rotating belts or tracks arranged in succession along the path of travel of the mouth of the sack, between the position where the mouth, already in the stretched position, is gripped, and the position where it is fed into the sewing machine, the first pair being composed of belts or tracks which can be alternately spaced somewhat apart or brought close together so that they completely grip the said mouth.
  • the apparatus also includes sensing means for sensing the arrival of the mouth stretched by the rods in the space between the first pair of belts when spaced apart, and driving means which are actuated by the said sensing means and which bring about the reciprical closing together of the branches of the belts or tracks of the said first pair on to the two sides of the said mouth over its whole length, this operation being carried out while it is still gripped and taut, and the said apparatus is released later when the belts or tracks have clamped themselves around the said mouth.
  • the device includes further means which return the belts or tracks of the said first pair to the condition where they are spaced apart, in preparation for the repeat of the cycle of the arrival of another sack which comes about after the mouth of that sack engaged in the device has been totally transferred to between the belts or tracks of the next pair, the branches of which are always close together.
  • each belt or track of the two pairs is held taut between two driving pulleys one at each end, the first pulleys of the second pair being coaxial with the second pulleys of the first pair, and the axes of the said coaxial pulleys comprising the axes around which the belts or tracks of the first pair can be I spread by opening angularly large enough to give rise to the space necessary between the adjacent branches for the temporary positioning of the mouth stretched by the rods of the gripping and stretching apparatus.
  • FIG. 1 is a perspective view of the device immediately prior to the transfer of the sack from the mouth handling and distention device to the stitching machine conveyor;
  • FIG. 2 shows the device of FIG. 1 after completion of the first stage of the transfer operation:
  • FIG. 3 is a plan view, in a simplified and schematic constructional form of a device to perform the transfer operation automatically, as a function of the progressive feed of the sacks:
  • FIG. 4 is an elevation view of the device in FIG. 3.
  • the device is linked to a unit for sealing the sticks, b y stitching them, and comprising an apparatus (for which a detailed description is given in the above mentioned application) having operational characteristics based on vertical and parallel rods (10 and 1]), suitable for insertion, by downward movement B, into mouth 12 of sack 13 being fed in direction A at uniform speed, ag. on a belt or track conveyor.
  • These rods carry out their downward movement sufficiently close together to ensure that they go right into the sack mouth, i.e., with the sack open. Obviously these operations can also be performed manually.
  • the mouth thus distended is shown at 12', and it has to be fed and inserted in that state between the operating parts of the stitching machine (schematically indicated at 15) by means of the action of the conveyor 12", while the said rods are withdrawn from the mouth and carried back to their initial position, with everything being as described in detail in the above-mentioned application, ready for the next sack being fed in direction A.
  • the said conveyor comprises at least two pairs of conveyor belts 20 and 21 and 22 and 23, respectively, which encircle the sacks and travel at a linear speed equal to feed speed A to form two conveyor systems which operate in succession.
  • the bottom conveyor has belts 20 and 21 which pass around bottom return pulleys 24 and 25 and top return pulleys 26 and 27, arranged in such a way that sections 28 and 29, respectively, of the said belts move parallel and close together, and travel in the same direction at identical speeds, so as to ensure the desired transfer of the distended sack mouths under the action of stitching machine 15.
  • the top conveyor system viz. the one which is the first to receive the flattened mouths, comprises belts 22 and 23 which pass around bottom return pulleys which are coaxial, adjacent and rotatively connected to top pulleys 26 and 27 in the lower system and around top pulleys 30 and 31.
  • top and bottom pulleys in the top system are pin mounted and the pins, in turn, are mounted on rigid arms 32 and 33 (FIGS. 3 and 4) and can be rotated around axes 34 and 35 (FIG. 1) of top pulleys 26 and 27 in the bottom system and the bottom pulleys in the top system.
  • These two arms 32 and 33, together with their belts 22 and 23 can be symmetrically moved in directions F and G (FIG. 2) and closed in directions F and G (FIG. 1) for rotation around the aforementioned axes 34 and 35 respectively, as can be seen from a close look at FIGS. 1 and 2.
  • this device is dimensioned in such a way that belts 22 and 23 of the top system form; when the arms are moved, a triangular area with the vertex pointing in the direction of sack feed A and with the hypotenuse much greater than the maximum longitudinal dimension presented by distended mouth 12' of the sacks to be closed.
  • the above mentioned parts are controlled in such a way that the transfer from the sack handling and distention device, which comprises rods and 11 to the stitching machine conveyor is carried out in three successive stages which follow each other at minimum time intervals, viz. mouth 12 distended between rods 10 and 11 arrives fully in the area defined by forked belts 22 and 23 (FIG. 1): the arms carrying top return pulleys 30 and 31 rotate towards each other, indirection F and G', grasping mouth 12 between the adjacent sections of belts 22 and 23 (FIG. 2):
  • the flattened sack mouths 12 continue their infeed and travel without interruption continuity of from the top conveyor system to the bottom one (in other words between belts 20 and 21) and then into the stitching machine 15.
  • arms 32 and 33 of the top conveyor system are again moved in directions F and G, and return to the condition illustrated in FIG. 1, so that the cycle can be repeated for the next sack and so on.
  • the device described above is automatically controlled. generally in such a way as not to influence its operation by different sack mouth sizes (obviously compatible with the handling and distention possibilities of rods 10 and ll of the apparatus described in the above mentioned application) by devices which follow up the detection action carried out by special sensing devices.
  • the device can be provided with an initial feeler operating in the transverse plane marked X which indicates that the front edge of distended mouth 12' has arrived close to the bottom of the area between the spread arms of the top conveyor system, or in other words, that the whole mouth is ready to be engaged by the said system, while a second feeler, operating in the transverse plane marked Y will indicate that the bottom edge of the same mouth has entered the intake of the bottom conveyor system, i.e.
  • the condition signalled by the first feeler determines the closure movement (F' and G) of the arms around the mouth which is still stretched between rods 10 and 11, and the condition detected by the second feeler determines the movement of the said arms, to prepare the system to receive the next sack mouth and so on.
  • FIGS. 3 and 4 schematically show apparatus for the operation and control of the moving parts in the improved device, or in the top conveyor system.
  • the arms 32 and 33 in the said top system are angularly integral with levers 42 and connected to link rods 44 and 45 which, in turn, are joined at pivot 46 on longitudinally movable part 47 which is stressed in one direction by a spring 48 and its end, opposite pivot 46 has a hook 49 which can be engaged by claw 50.
  • Claw 50 moves up and down on pin 51 and is stressed by spring 52, in the direction in which it is hooked and held by part 47, pulling against spring 48, in the position as indicated in FIG. 3, in which arms 32 and 33 are spread apart.
  • Claw 50 can be disengaged from hook 49, for example, by energizing solenoid 53 (FIG. 3), by closing switch 54.
  • Part 47 can, furthermore, be carried back to the hooked position in FIG. 3 by means of suitable mechanical means which includes, for example, pinion 55 which meshes with rack 56 which is on part 47 and is operated, for example, through a pair of gears 57 and 58 (FIG. 4) by shaft 59 via electromagnetic clutch 60 which has a switch 61 in its excitation circuit.
  • suitable mechanical means which includes, for example, pinion 55 which meshes with rack 56 which is on part 47 and is operated, for example, through a pair of gears 57 and 58 (FIG. 4) by shaft 59 via electromagnetic clutch 60 which has a switch 61 in its excitation circuit.
  • the feeler operating in plane (X) has sensing device 54a controlling switch 54, while the feeler in plane (Y) has a similar sensing device 61a to control switch 61.
  • Other means can be employed, e.g. photoelectric cells or resistors for detecting the arrival or the passage of the sack mouths either in or outside certain given positions, and to initiate the necessary operations.
  • switch 61 When sensing device 61a is no longer affected by the sack, which has passed beyond plane (Y), switch 61 (FIG. 4) is closed to engage clutch 60 which temporarily with claw 50, and, thus, again causing the arms of the top conveyor system to open.
  • limit switches or other means are provided to de-energize electromagnetic clutch 60 once the movement is over, and the various circuits are also provided with suitable self-excitation devices to ensure that the operation of electromagnetic clutch 60 through sensing device 61a only takes place once the mouth 12 is in contact with the said sensing device and at the very moment when the said sensing device loses contact with the mouth as it fully moves away.
  • Apparatus for feeding distended open mouths of sacks to a sewing machine comprising first and second conveyor means positioned sequentially from said sewing machine to feed the sacks thereto, said second conveyor means including swingably mounted elements which can open to receive the sacks and close to engage and feed the sacks to the first conveyor means for subsequent feed to the sewing machine, spring means acting on said second conveyor means to urge the swingably mounted elements to open position, sensing means positioned adjacent said second conveyor means to detect the presence therein of a sack, and power means connected to said sensing means for being operated thereby and coupled to said second conveyor means to close the same against the opposition ofithe spring means when the sensing means detects a sack within the second conveyor means.
  • first and second conveyor means include respective pairs of belts having straight branches opposed to one another to feed sacks therebetween.
  • first and second conveyor means comprise respective upstream and downstream pulleys on which the belts travel, the upstream pulleys of the second conveyor means being coaxial with the downstream pulleys of the first conveyor means, said swingably mounted elements being pivotal about the common axes of said coaxial pulleys.
  • said sensing means comprises a first sensing device in the path of the mouths of the sacks for detecting entry of a sack into the second conveyor means and a second sensing device for detecting exit of a sack from the second conveyor means.
  • said power means comprises a locking device to hold the swingably mounted elements in closed position, said locking device being coupled to said second sensing device for being deactivated when the sack has passed from the second conveyor means to permit the swingably mounted elements to open under the action of the spring means, and a drive means coupled to the first sensing device to close said swingably mounted elements when the sack enters the second conveyor means.
  • said locking device comprises an electromagnetically operated locking member controlled by said second sensing device.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Sewing Machines And Sewing (AREA)
  • Package Closures (AREA)
US766576A 1968-02-28 1968-10-10 Devices for transporting and feeding sacks and similar nonrigid containers into sewing machines for their sealing Expired - Lifetime US3527180A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1331668 1968-02-28
DE19691941560 DE1941560B2 (de) 1968-02-28 1969-08-12 Vorrichtung zum zufuehren des offenen endes von saecken in sackzunaehmaschinen

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US3527180A true US3527180A (en) 1970-09-08

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US766576A Expired - Lifetime US3527180A (en) 1968-02-28 1968-10-10 Devices for transporting and feeding sacks and similar nonrigid containers into sewing machines for their sealing

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US (1) US3527180A (enrdf_load_stackoverflow)
DE (1) DE1941560B2 (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2341685A1 (fr) * 1976-02-20 1977-09-16 Mabi Srl Machine semi-automatique a coudre la pointe des bas, specialement du type des collants
US4137855A (en) * 1977-06-20 1979-02-06 Mcclusky Stanley A Transfer means for a pliant bag having contents therein
US4696244A (en) * 1986-12-22 1987-09-29 Doboy Packaging Machinery, Inc. Thread chaining detector
WO1991004365A1 (de) * 1989-09-22 1991-04-04 G.M. Pfaff Aktiengesellschaft Verfahren und vorrichtung zum zusammenführen, ausrichten und gemeinsamen verarbeiten von biegeschlaffen werkstücklagen
US20030159636A1 (en) * 2002-02-26 2003-08-28 Kames Edward D. Machine and method for closing and stitching final edge of filled quilt cover
US6722300B2 (en) * 2001-02-13 2004-04-20 Phoenix Automation, Inc. Comforter closer apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2341685A1 (fr) * 1976-02-20 1977-09-16 Mabi Srl Machine semi-automatique a coudre la pointe des bas, specialement du type des collants
US4137855A (en) * 1977-06-20 1979-02-06 Mcclusky Stanley A Transfer means for a pliant bag having contents therein
US4696244A (en) * 1986-12-22 1987-09-29 Doboy Packaging Machinery, Inc. Thread chaining detector
WO1991004365A1 (de) * 1989-09-22 1991-04-04 G.M. Pfaff Aktiengesellschaft Verfahren und vorrichtung zum zusammenführen, ausrichten und gemeinsamen verarbeiten von biegeschlaffen werkstücklagen
US6722300B2 (en) * 2001-02-13 2004-04-20 Phoenix Automation, Inc. Comforter closer apparatus
US20030159636A1 (en) * 2002-02-26 2003-08-28 Kames Edward D. Machine and method for closing and stitching final edge of filled quilt cover
US6732669B2 (en) * 2002-02-26 2004-05-11 Michael V. Schwarzberger Machine and method for closing and stitching final edge of filled quilt cover

Also Published As

Publication number Publication date
DE1941560A1 (de) 1971-03-18
DE1941560B2 (de) 1973-08-23
DE1941560C3 (enrdf_load_stackoverflow) 1974-05-02

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