EP0137480A2 - Apparatus for plastic film packaging spools of sewing thread and the like - Google Patents

Apparatus for plastic film packaging spools of sewing thread and the like Download PDF

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Publication number
EP0137480A2
EP0137480A2 EP84112027A EP84112027A EP0137480A2 EP 0137480 A2 EP0137480 A2 EP 0137480A2 EP 84112027 A EP84112027 A EP 84112027A EP 84112027 A EP84112027 A EP 84112027A EP 0137480 A2 EP0137480 A2 EP 0137480A2
Authority
EP
European Patent Office
Prior art keywords
plastic film
spool
flap
guides
folding
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Withdrawn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
EP84112027A
Other languages
German (de)
French (fr)
Other versions
EP0137480A3 (en
Inventor
Cesare Tartarini
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.)
NUOVA FIMA IMBALLAGGI Srl
Original Assignee
NUOVA FIMA IMBALLAGGI Srl
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 NUOVA FIMA IMBALLAGGI Srl filed Critical NUOVA FIMA IMBALLAGGI Srl
Publication of EP0137480A2 publication Critical patent/EP0137480A2/en
Publication of EP0137480A3 publication Critical patent/EP0137480A3/en
Withdrawn legal-status Critical Current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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
    • B65B11/28—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a curved path, e.g. on rotary tables or turrets
    • B65B11/30—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a curved path, e.g. on rotary tables or turrets to fold the wrappers in tubular form about contents
    • B65B11/32—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a curved path, e.g. on rotary tables or turrets to fold the wrappers in tubular form about contents and then to form closing folds of similar form at opposite ends of the tube

Definitions

  • This invention relates to an apparatus for plastic film packaging spools of sewing thread and the like.
  • sewing thread is usually sold in spools of tubular shape which are covered with a film of a plastic material, heat sealed longitudinally to the spool.
  • the spool is provided at the ends with disk-like expansions confining the area wherearound the thread is wound; in that case, it is common practice to arrange for the plastic film to not only wrap around the thread roll but also around such expansions, to fold frontally on the spool at both sides.
  • an apparatus for plastic film packaging spools of sewing thread and the like comprising a means of initially winding said plastic film around the spool, a means of cutting off the plastic film portion wrapped around said spool, a gripping means for gripping the spool as it leaves said means of initially winding the plastic film, a means of folding over the spool a first longitudinal flap of the plastic film wrapped around said spool, and a means of welding the second longitudinal flap of the plastic film to said first flap, characterized in that said gripping means and folding means are carried rotatably on a shaft lying parallel to the spool axis, and that said welding means comprises a cylinder segment coaxial with said shaft and adapted to cause, the second flap to be folded over and welded to the first flap, during the rotation of said gripping means.
  • a thread spool intended for packaging in a film of a heat sealable plastic material.
  • the spool 1 is caused to rest initially onto a platform 2 which is vertically adjustable to accommodate various spool sizes.
  • the platform 2 is located centrally to a device for starting to wind the plastic film around the spool, as generally indicated at 3.
  • the initial winding device 3 comprises essentially a pair of vertically aligned guides 4, and a pusher 5 which is effective, by sliding above said platform 2, to insert the spool 1 in between the guides 4.
  • the pusher 5 is reciprocated through an articulated parallelogram of sort including a pair of arms 6,7 adapted for oscillation on a vertical plane, and a crossmemher 8 hingedly connected at its ends to the tops of said arms through respective pivot pins 9,10; the pusher 5 is secured longitudinally to the crossmember 8 via screw means 11.
  • the arms 6,7 are radially mounted at their lower ends to respective shafts 12,13 which are journalled in the stationary frame 14 of the apparatus.
  • the shaft 12 has keyed radially thereto an additional arm 15, which has one end of an actuating connecting rod 16 pivoted thereto.
  • the other end of the connecting rod 16 is pivoted to a crank arm 17 mounted on the driveshaft 18.
  • a plastic film cutter device Located above the inlet ends of the guides 4 is a plastic film cutter device comprising a fixed blade 19 and movable blade 20.
  • the fixed blade 19, is rigidly mounted to a plate 21, set vertically above, and orthogonally across, the longitudinal axis of the apparatus defined by the path of movement of the reciprocating pusher 5.
  • Said plate 21 guides the advancing plastic film, driven downwards thereon, and cut thereat, by the moveable blade 20 driven so as to cooperate with said fixed blade 19.
  • the upper guide 4 incorporates, journalled at 22, a small spring-loaded lever 23 adapted to hold the plastic film stretched around the spool 1.
  • a pair of grippers 25 comprising a pair of superimposed jaws 24 adapted to grip the spool 1 therebetween.
  • the jaws 24 are carried on respective short arms 26 which are journalled on respective brackets 27 extending vertically at opposite sides of a tabular block 28.
  • a stem 29 is slidable along the block 28 for insertion in between the jaws 24 of said grippers; the stem 29 is elastically linked to the block through a spring 30 which is mounted, in alignment with the longitudinal axis of the stem, by means of pegs 31,32, secured to the block and stem respectively.
  • the short arms 26 of the grippers are urged elastically towards each other by a pair of springs 33, each comprising a screw 34 which acts against the block 28 to permit adjustment of the gripping range.
  • the grippers 25 are carried radially at the end of a shaft 35 journalled in the stationary frame of the apparatus. Mounted rotatably on the shaft 35 is a holder 36 for a sector folding element 37 which is adapted to be lowered onto the jaws 24 of the grippers.
  • the angular rotation of the grippers 25 and folding element 37 is driven through respective connecting rods 38,39 which are pivotally connected to crank arms 40,41 fast with the driveshaft 18.
  • a welding or sealing device which comprises a cylinder segment 42 coaxial with the shaft 35 and adjoining the jaws 24 of the grippers, said cylinder segment providing a housing for conventional heater means 43.
  • a detent 44 is adapted to engage with a lag 45 on the upper jaw, so as to spread the grippers 25 open.
  • the spool 1, as laid onto the platform 2, is driven by the reciprocating pusher 5 in between the guides 4; prior to entering the gap between said guides, the spool 1 is caused to strike the plastic film which is moving vertically down in contact with the plate 21 and forcing it to wrap itself around the spool. Simultaneously therewith, the movable blade 20 of the cutter device is driven to cut off a required portion from the plastic film for packaging the spool. In moving through the guides 4, the spool 1 will raise the spring-loaded lever 23 which, by pressing down on the spool, ensures that the plastic film is held stretched thereon.
  • the pusher 5 will insert the spool 1 in between the jaws 24 of the grippers 25. Then, the folding element 37 is actuated rotatively which, on being lowered onto the jaws of said grippers, causes the upper flap of the plastic film to be wrapped onto the spool.
  • the grippers 25 are rotated angularly to cause the jaws 24 to slide across the curved surface of the welder 42.
  • the lower flap of the plastic film will fold over and be welded to the upper flap.
  • the detent 44 On leaving the welder 42, the detent 44, on striking the lug 45, will hold back the upper jaw 24 of the grippers 25, thereby the latter is caused to release the packaged spool.
  • the folding element 37 and welder 42 have peripheral walls, 46 and 47 respectively provided thereon.
  • the wall 46 produces a first fold in the plastic film, frontally to the spool at either side thereof; in that case, it is, of course, envisaged that the plastic film has a greater width than the longitudinal dimension of the spoolo
  • a second front fold of the plastic film over the first is produced by the expansion 48 of the wall 47, which wall will then effect welding of the plastic film.
  • the arm 15 is formed with a slot 49 which permits the pivot point on the connecting rod 16 to be varied with reference to the scale 50.
  • any materials, shapes, and dimensions may be selected contingent on individual requirements.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)

Abstract

@ The apparatus for plastic film packaging spools of sewing thread and the like comprises an initial winding device (3) for winding the plastic film around a spool (1), which device (3) comprises a pair of guides (4) across the inlets whereof a plastic film is fed, and a pusher (5) which is adapted to insert the spool in between said guides (4); a cutting device (19,20) for cutting off the portion of plastic film which is being wound around said spool (1); a gripper (25) for picking up the spool leaving said guides (4); a folder (37) for folding over the spool a first longitudinal flap of the plastic film partly wound around said spool; and a welding device (42,43) for welding the second longitudinal flap of the plastic film to the first flap. The second flap is adapted to fold, by rotation of the grippers (25), over the first flap in abutment relationship with the welding device (42,43).

Description

  • This invention relates to an apparatus for plastic film packaging spools of sewing thread and the like.
  • As is known, sewing thread is usually sold in spools of tubular shape which are covered with a film of a plastic material, heat sealed longitudinally to the spool. Sometimes the spool is provided at the ends with disk-like expansions confining the area wherearound the thread is wound; in that case, it is common practice to arrange for the plastic film to not only wrap around the thread roll but also around such expansions, to fold frontally on the spool at both sides.
  • It is an object of this invention to provide such an apparatus which can automatically package sewing thread spools in a plastic film, is of simple design, reliable and versatile in operation, capable of accommodating spools of various shapes and sizes.
  • This object is achieved by an apparatus for plastic film packaging spools of sewing thread and the like, comprising a means of initially winding said plastic film around the spool, a means of cutting off the plastic film portion wrapped around said spool, a gripping means for gripping the spool as it leaves said means of initially winding the plastic film, a means of folding over the spool a first longitudinal flap of the plastic film wrapped around said spool, and a means of welding the second longitudinal flap of the plastic film to said first flap, characterized in that said gripping means and folding means are carried rotatably on a shaft lying parallel to the spool axis, and that said welding means comprises a cylinder segment coaxial with said shaft and adapted to cause, the second flap to be folded over and welded to the first flap, during the rotation of said gripping means.
  • The invention features will be more readily apparent from the following description of a preferred embodiment of this apparatus for plastic film packaging thread spools, with reference to the accompanying illustrative drawings, where:
    • Figure 1 is a side elevation view of this apparatus; and
    • Figure 2 is a partly cut-away plan view thereof.
  • With reference to the drawing views, indicated at 1 is a thread spool intended for packaging in a film of a heat sealable plastic material. The spool 1 is caused to rest initially onto a platform 2 which is vertically adjustable to accommodate various spool sizes.
  • The platform 2 is located centrally to a device for starting to wind the plastic film around the spool, as generally indicated at 3. The initial winding device 3 comprises essentially a pair of vertically aligned guides 4, and a pusher 5 which is effective, by sliding above said platform 2, to insert the spool 1 in between the guides 4.
  • The pusher 5 is reciprocated through an articulated parallelogram of sort including a pair of arms 6,7 adapted for oscillation on a vertical plane, and a crossmemher 8 hingedly connected at its ends to the tops of said arms through respective pivot pins 9,10; the pusher 5 is secured longitudinally to the crossmember 8 via screw means 11. The arms 6,7 are radially mounted at their lower ends to respective shafts 12,13 which are journalled in the stationary frame 14 of the apparatus. The shaft 12 has keyed radially thereto an additional arm 15, which has one end of an actuating connecting rod 16 pivoted thereto. The other end of the connecting rod 16 is pivoted to a crank arm 17 mounted on the driveshaft 18.
  • Located above the inlet ends of the guides 4 is a plastic film cutter device comprising a fixed blade 19 and movable blade 20. The fixed blade 19, is rigidly mounted to a plate 21, set vertically above, and orthogonally across, the longitudinal axis of the apparatus defined by the path of movement of the reciprocating pusher 5. Said plate 21 guides the advancing plastic film, driven downwards thereon, and cut thereat, by the moveable blade 20 driven so as to cooperate with said fixed blade 19.
  • The upper guide 4 incorporates, journalled at 22, a small spring-loaded lever 23 adapted to hold the plastic film stretched around the spool 1. Located at the outlet ends of the guides 4 of the initial winding device 3 are a pair of grippers 25, comprising a pair of superimposed jaws 24 adapted to grip the spool 1 therebetween. The jaws 24 are carried on respective short arms 26 which are journalled on respective brackets 27 extending vertically at opposite sides of a tabular block 28. A stem 29 is slidable along the block 28 for insertion in between the jaws 24 of said grippers; the stem 29 is elastically linked to the block through a spring 30 which is mounted, in alignment with the longitudinal axis of the stem, by means of pegs 31,32, secured to the block and stem respectively.
  • The short arms 26 of the grippers are urged elastically towards each other by a pair of springs 33, each comprising a screw 34 which acts against the block 28 to permit adjustment of the gripping range. The grippers 25 are carried radially at the end of a shaft 35 journalled in the stationary frame of the apparatus. Mounted rotatably on the shaft 35 is a holder 36 for a sector folding element 37 which is adapted to be lowered onto the jaws 24 of the grippers. The angular rotation of the grippers 25 and folding element 37 is driven through respective connecting rods 38,39 which are pivotally connected to crank arms 40,41 fast with the driveshaft 18.
  • Mounted below the grippers 25 is a welding or sealing device, which comprises a cylinder segment 42 coaxial with the shaft 35 and adjoining the jaws 24 of the grippers, said cylinder segment providing a housing for conventional heater means 43.
  • At the welder 42 outlet end, a detent 44 is adapted to engage with a lag 45 on the upper jaw, so as to spread the grippers 25 open.
  • The apparatus heretofore described operates as follows.
  • The spool 1, as laid onto the platform 2, is driven by the reciprocating pusher 5 in between the guides 4; prior to entering the gap between said guides, the spool 1 is caused to strike the plastic film which is moving vertically down in contact with the plate 21 and forcing it to wrap itself around the spool. Simultaneously therewith, the movable blade 20 of the cutter device is driven to cut off a required portion from the plastic film for packaging the spool. In moving through the guides 4, the spool 1 will raise the spring-loaded lever 23 which, by pressing down on the spool, ensures that the plastic film is held stretched thereon.
  • At the end of its stroke, the pusher 5 will insert the spool 1 in between the jaws 24 of the grippers 25. Then, the folding element 37 is actuated rotatively which, on being lowered onto the jaws of said grippers, causes the upper flap of the plastic film to be wrapped onto the spool.
  • At this time, the grippers 25 are rotated angularly to cause the jaws 24 to slide across the curved surface of the welder 42. On contacting said curved surface, the lower flap of the plastic film will fold over and be welded to the upper flap. It should be noted that the spool held in the grippers is being acted upon elastically by the stem 29, which provides an adequate pressure force during the welding process.
  • On leaving the welder 42, the detent 44, on striking the lug 45, will hold back the upper jaw 24 of the grippers 25, thereby the latter is caused to release the packaged spool.
  • In order to package a spool comprising disk-like expansions at its ends, the folding element 37 and welder 42 have peripheral walls, 46 and 47 respectively provided thereon. The wall 46 produces a first fold in the plastic film, frontally to the spool at either side thereof; in that case, it is, of course, envisaged that the plastic film has a greater width than the longitudinal dimension of the spoolo
  • A second front fold of the plastic film over the first is produced by the expansion 48 of the wall 47, which wall will then effect welding of the plastic film.
  • It should be noted that in order to enable packaging of thread spools having different sizes, as indicated at 1a in Figure 1, additionally to height adjustment of the platform 2 and opening the guides 4 and grippers 25, it is envisaged that the stroke distance of the pusher 5 be adjustable.
  • To that aim, the arm 15 is formed with a slot 49 which permits the pivot point on the connecting rod 16 to be varied with reference to the scale 50.
  • In practicing the invention, any materials, shapes, and dimensions may be selected contingent on individual requirements.

Claims (7)

1. An apparatus for plastic film packaging spools of sewing thread and the like, comprising a means (3) of initially winding said plastic film around the spool (1), a means (19,20) of cutting off the plastic film portion wrapped around said spool, a gripping means (25) for gripping the spool (1) as it leaves said means (3) of initially winding the plastic film, a means (37) of folding over the spool a first longitudinal flap of the plastic film wrapped around said spool, and a means (42,43) of welding the second longitudinal flap of the plastic film to said first flap, characterized in that said gripping means (25) and folding means (37) are carried rotatably on a shaft (35) lying parallel to the spool (1) axis, and that said welding means comprises a cylinder segment (42) coaxial with said shaft (35) and adapted to cause, the second flap to be folded over and welded to the first flap, during the rotation of said gripping means.
2. An apparatus according to Claim 1, characterized in that said means (3) of initially winding said plastic film comprise a pair of guides (4) across inlet ends whereof the plastic film is fed and a pusher (5) inserting said spool (1) in between said guides (4) and striking said plastic film with one side.
3. An apparatus according to Claim 1 and 2, characterized in that said gripping means (25) comprises a pair of jaws (24) movable together with respective short arms (26) which are journalled on respective brackets (27), extending substantially vertically at opposed sides of a tubular block (28) made rigid with said shaft (35) and slidably accommodating a spring loaded stem (29) applying a pressure force on said spool when gripped in said jaws.
4. An apparatus according to Claim 1, characterized in that said folding means comprises a folding element (37) movable frontally towards the jaws (24) of said gripping means (25).
5. An apparatus according to the preceding claims, characterized in that said folding element (37) and said cylinder segment (42) have, at lateral edges thereof, small peripheral walls (46,47) for folding and welding of the plastic film at opposed ends of the spool.
6. An apparatus according to Claim 2, characterized in that said guides (4) have journalled thereon a small spring-loaded lever (23) pressing on said spool (1) and holding said plastic film stretched thereon.
7. An apparatus according to Claim 2, characterized in that said pusher (5) is reciprocated by means of an articulated parallelogram (6,8) of sort oscillating on a vertical plane.
EP84112027A 1983-10-13 1984-10-08 Apparatus for plastic film packaging spools of sewing thread and the like Withdrawn EP0137480A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT358283 1983-10-13
IT833582A IT1171954B (en) 1983-10-13 1983-10-13 EQUIPMENT FOR PACKAGING SEWING AND SIMILAR SPOOLS WITH PLASTIC FILM

Publications (2)

Publication Number Publication Date
EP0137480A2 true EP0137480A2 (en) 1985-04-17
EP0137480A3 EP0137480A3 (en) 1985-06-05

Family

ID=11110133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112027A Withdrawn EP0137480A3 (en) 1983-10-13 1984-10-08 Apparatus for plastic film packaging spools of sewing thread and the like

Country Status (3)

Country Link
EP (1) EP0137480A3 (en)
ES (1) ES536963A0 (en)
IT (1) IT1171954B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114393839B (en) * 2022-01-14 2024-03-26 台州至诚自动化科技有限公司 Light sheet cotton belt cutting and welding mechanism

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1955493A (en) * 1932-07-01 1934-04-17 Forgrove Mach Apparatus for folding wrappers around tablets
US2642707A (en) * 1949-01-29 1953-06-23 Lynch Corp Package wrapping machine
IT1001420B (en) * 1973-11-21 1976-04-20 Gd Spa WRAPPING MACHINE FOR CANDIES AND SIMILAR PRODUCTS PERFECTED TO PERFORM WRAPPING SINGLE PRODUCTS OF THE SO-CALLED SAPO NE OR DIAMOND TYPE
DE2740266C2 (en) * 1977-09-07 1983-06-01 Focke & Pfuhl, 3090 Verden Device for wrapping objects in a blank
DE2924407C2 (en) * 1979-06-16 1986-10-02 Otto Hänsel GmbH, 3000 Hannover Device for the continuous wrapping of sweets or similar small parts

Also Published As

Publication number Publication date
IT8303582A0 (en) 1983-10-13
IT1171954B (en) 1987-06-10
ES8600711A1 (en) 1985-10-16
ES536963A0 (en) 1985-10-16
EP0137480A3 (en) 1985-06-05

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: TARTARINI, CESARE