EP1171377B1 - Procede et systeme permettant de former des bandes de ressorts helicoidaux ensaches - Google Patents

Procede et systeme permettant de former des bandes de ressorts helicoidaux ensaches Download PDF

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Publication number
EP1171377B1
EP1171377B1 EP20000911198 EP00911198A EP1171377B1 EP 1171377 B1 EP1171377 B1 EP 1171377B1 EP 20000911198 EP20000911198 EP 20000911198 EP 00911198 A EP00911198 A EP 00911198A EP 1171377 B1 EP1171377 B1 EP 1171377B1
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EP
European Patent Office
Prior art keywords
springs
fabric
plies
seam
longitudinal
Prior art date
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Expired - Lifetime
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EP20000911198
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German (de)
English (en)
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EP1171377B2 (fr
EP1171377A1 (fr
Inventor
Roland Graf
Thomas J. Wells
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Spuehl AG St Gallen
Spuehl AG
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Spuehl AG St Gallen
Spuehl AG
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Priority claimed from US09/353,483 external-priority patent/US6336305B1/en
Application filed by Spuehl AG St Gallen, Spuehl AG filed Critical Spuehl AG St Gallen
Priority to DE60015318T priority Critical patent/DE60015318T3/de
Publication of EP1171377A1 publication Critical patent/EP1171377A1/fr
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Publication of EP1171377B1 publication Critical patent/EP1171377B1/fr
Publication of EP1171377B2 publication Critical patent/EP1171377B2/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B68—SADDLERY; UPHOLSTERY
    • B68G—METHODS, EQUIPMENT, OR MACHINES FOR USE IN UPHOLSTERING; UPHOLSTERY NOT OTHERWISE PROVIDED FOR
    • B68G9/00—Placing upholstery springs in pockets; Fitting springs in upholstery

Definitions

  • This invention relates generally to spring assemblies for mattresses, cushions and the like, and, more particularly, to a method and system for making a string of connected individually pocketed coil springs for mattresses, cushions, spring units and the like.
  • Pocketed coil springs are often referred to as a Marshall construction in which each coil spring is encased within its own fabric sack or pocket.
  • the sack or pocket is typically defined between two plies of a fabric strip connected together at intervals along transverse lines spaced along the strip.
  • the two-ply fabric strip is generally formed by folding a strip of double width fabric upon itself along a longitudinal centerline, leaving the overlapped plies along the unjoined opposite edges of the strip to be connected to each other along a longitudinal seam to close the pockets defined between the transverse lines of connection after the springs are inserted between the plies.
  • a method and apparatus for making coil springs enclosed within individual pockets in an elongate fabric strip comprised of two overlying plies capable of being thermally welded together.
  • the fabric strip is fed along a guide path during which compressed springs are inserted between the plies with the axes of the springs substantially normal or perpendicular to the planes of the plies.
  • the fabric plies are thermally welded together longitudinally and transversely while the spring remains compressed to form a string of pocketed coils.
  • the pocketed coils are passed through a turner assembly during which the springs are reoriented typically about 90° within the fabric pockets to positions wherein the axes of the springs are transverse to the fabric strip.
  • WO98/11015 discloses a method for forming pocketed springs in which fabric is formed into an envelope and compressed springs inserted into the envelope. The flap is then folded over and attached with a longitudinal seam. Individual pockets are created with transverse seams and the springs rotated within their pockets to make their longitudinal axes parallel to the transverse seams.
  • the present invention overcomes the above described and other disadvantages in the prior art by providing an improved method and system for producing strings of pocketed coil springs which are effective in performance, yet cost effective in that it requires a minimum amount of materials and labor.
  • the manner in which the springs are inserted into the fabric and the formation of the pocket according to this invention avoids the need for turning or repositioning the springs within the pockets while still providing an efficient and reliable manufacturing system and associated method for reliably producing consistently aligned springs within undamaged fabric pockets.
  • the present invention preferably begins with the insertion of a compressed coil spring between upper and lower plies of a folded thermally welded fabric.
  • the present invention is a continuous production process such that the fabric is indexed or pulled past a spring insertion station so that the compressed springs are individually inserted between the plies of the folded fabric at spaced intervals as the fabric passes the spring insertion station.
  • the springs are maintained in a compressed configuration between the plies of the fabric while a longitudinal seam is formed in the fabric to join the two plies together proximate free edges of the plies opposite from a longitudinal fold line of the fabric. Since the fabric is a thermally weldable material, preferably the longitudinal seam is formed by a cooperating thermal weld head and anvil combination.
  • the relaxation and expansion of the springs within the fabric is controlled by a pair of rotating members on opposite sides of the springs according to various alternative embodiments of this invention.
  • the rotating members in presently preferred embodiments may be a pair of oppositely rotating wheels with axes of rotation generally parallel to the longitudinal axes of the springs.
  • the wheels include a plurality of arcuate-shaped recesses which combine to partially surround each spring during the expansion.
  • the rotating members may include a pair of bands each passing over a pair of spaced rollers. The fabric and springs pass between the bands and a separation distance between the bands increases in a downstream direction to thereby control the expansion of the springs between the bands. In either embodiment, the springs are supported during their expansion into an upright position.
  • individual pockets are formed preferably by a transverse weld head sealing the fabric between each of the springs generally parallel to the spring axes.
  • the transverse seams are formed in the fabric to complete the individual pockets for the individual springs.
  • the orientation of the springs remains generally unchanged throughout the pocketing process so that reorientation, turning or the like of the springs within the pockets is avoided.
  • the longitudinal seam formed in the fabric is positioned on a side face of the individual spring pockets in the resulting string of pocketed coil springs thereby avoiding the problem known in the art known as "false loft". False loft occurs when the longitudinally extending seams maintain the cover material at a certain distance away from the ends of the springs so that when the mattress is first purchased, this distance is fairly uniform.
  • the longitudinally extending seams or other excess fabric in the pocketed coil string may become crushed thus leaving areas or regions of depression.
  • the entire support surface of the mattress or cushion will similarly be crushed and will appear substantially flat. A user may not realize the source of this phenomenon and consider it to be a defect in the mattress or cushion.
  • the problem of false loft is thereby avoided in the present invention by positioning the longitudinal seam of the string of springs on a side thereof while still avoiding the need to turn or reorient the individual springs within the pockets and the resulting damage to the fabric and other associated problems.
  • Another feature of this invention which also aids in the reduction of false loft and related problems is particularly useful for barrel shaped springs or other such springs which have a non-linear profile.
  • the transverse seam between adjacent springs in the string is shaped to conform to the profile of the springs and thereby produce a tighter, more conforming fabric pocket around the spring to avoid bunching or excess loose fabric around the spring.
  • a first presently preferred embodiment of a system 10 and associated method for forming a string 12 of pocketed coil springs 14 is shown.
  • Fabric 16 preferably thermally weldable as is well known in the art, is fed from a supply roll 18 around a roller 20 as shown in Fig. 1.
  • the fabric 16 could be cotton or another suitable material.
  • the fabric 16 is folded generally in half longitudinally about a longitudinal fold line 22 which coincides approximately with a longitudinal centerline of the fabric 16.
  • the fabric 16 is folded about the longitudinal fold line 22 to produce a first, upper ply 24 and a second, lower ply 26 of fabric 16 each with a free edge 28 spaced from the longitudinal fold line 22.
  • the folded fabric 16 passes upper and lower input rollers 30, 32 prior to entering a spring insertion station 34.
  • the rollers 20, 30 and/or 32 may be rotationally driven.
  • the spring insertion station 34 includes a reciprocating insertion plunger 36 having a cup-shaped spring receiving leading end 38 to receive therein a compressed coil spring 14.
  • the plunger 36 extends to insert the compressed spring 14 between the plies 24, 26 and retracts to receive another compressed spring 14 for subsequent insertion.
  • the spring 14 is formed and compressed and loaded onto the spring insertion plunger 36 and the fabric 16 is folded according to one of any number of well known systems and methods for doing so.
  • the spring insertion station 34 may comprise two U-shaped profiles which keep the spring 14 compressed and lead the springs 14 inside the folded fabric 16. In this method, the spring 14 is held with a horn (not shown) while the profiles return.
  • the springs 14 inserted between the plies 24, 26 are maintained in a compressed configuration between upper and lower support plates 40, 42 on the upper and lower faces, respectively, of the fabric 16 as particularly shown in Figs. 1 and 2.
  • the support plates 40, 42 are centered between the free edges 28 and longitudinal fold line 22 of the fabric 1 6 and may include a wider region 44 proximate the spring insertion station 34 which tapers downwardly to a region of smaller separation 46 between the plates 40, 42 as the fabric 16 and springs 14 advance through subsequent portions of the system 10.
  • a plurality of spaced alignment wheels 48 which are mounted for rotation proximate the longitudinal fold line 22 and free edges 28 of the fabric 16 control and direct the movement of the fabric 16 through the system 10.
  • the alignment wheels preferably include a plurality of projections 50 which engage the fabric 1 6 to maintain the movement of the fabric 16 in an aligned orientation with respect to the various stations and components of the system 10.
  • a longitudinal seam forming station 52 is located downstream from the spring insertion station 34 proximate the free edges 28 of the fabric 16, as shown in Figs. 1 and 2. After the compressed springs 14 are inserted between the plies 24, 26, the longitudinal seam forming station 52 joins the upper and lower plies 24, 26 of the fabric 16 together proximate their respective free edges 28 thereby initially enclosing the springs 14 within the fabric 16.
  • a longitudinal seam 54 is formed between a thermal weld head 56 which reciprocates downwardly and upwardly for cooperating welding engagement and disengagement, respectively, relative to an anvil 58 positioned below the lower ply 26.
  • the reciprocating weld head 56 and anvil 58 cooperate to form the longitudinal seam 54 in the fabric 16 by welding the respective plies 24, 26 together ultrasonically, thermally, or the like as is well known by those skilled in the art.
  • the anvil 58 is moved reciprocally while the thermal weld head 56 remains stationary.
  • the springs 14 remain compressed during the formation of the longitudinal seam 54 and weld with their longitudinal axes 60 generally perpendicular to the longitudinal seam 54. It should be appreciated that other means for joining the plies 24, 26 together to form the seams may be used such as stitching, staples.
  • a first transport station 62 is located downstream from the longitudinal seam forming station 52 and, in a presently preferred embodiment, includes four transport bands 64. Each band 64 passes over spaced forward and trailing rollers 66, 68, at least one of which is rotationally driven. A first pair of bands 64a at the first transport station 62 contacts the fabric 16 proximate the longitudinal fold line 22 passing therebetween. Another pair 64b of transport bands 64 contacts the fabric 16 proximate the longitudinal seam 54 as shown in Figs. 1 and 2. As the bands 64 pass around the spaced rollers 66, 68 in contact with the fabric 16, the fabric 16 is pulled from the supply roll 18 through the upstream stations and is advanced toward a downstream spring expansion station 70.
  • the compressed springs 14 are permitted to relax and expand within the fabric 16 at the spring expansion station 70.
  • the expansion of the springs 14 is controlled by a pair of oppositely rotating rotational members 72 on opposite sides of the springs 14 as shown in Fig. 1.
  • An axis of rotation 74 of each of the rotational members 72 according to the first presently preferred embodiment of Fig. 1 is generally parallel to the longitudinal axes 60 of the springs 14.
  • Each rotational member 72 includes a plurality of arcuate-shaped recesses 76, each of which combine, with a similarly configured recess 76 in the corresponding rotation member 72 on the opposite side of the spring 14 to partially surround each spring 14 and thereby control the expansion thereof. Additionally, the rotational members 72 assist in advancing the springs 14 and fabric 16 toward a transverse seam forming station 78 located downstream therefrom.
  • the transverse seam forming station 78 forms a transverse seam 80 in the fabric 16 between each of the adjacent springs 14 which have expanded within the fabric 16 from their compressed configuration.
  • the transverse seam forming station 78 includes a transverse seam weld head 82 and a cooperating transverse seam anvil 84 located on opposite sides of the forming string 12 of pocketed coil springs 14 from each other, as shown in Fig. 1.
  • the fabric 16 between the springs 14 is joined together thereby completing individual pockets 86 for each of the springs 14 and enclosing the springs 14 within the fabric 16.
  • transverse seam 80 such as stitching, staples or the like may be used . While the transverse seam 80 is formed, the fabric 16 is needed or gathered. As such, the string 12 of pocketed coil springs 14 must give in or contract somewhat to accommodate the seam forming process. This can be accomplished with an active mechanism such as a driven transport system or with in a passive manner such as friction between the fabric 16 and the transport rotational members 72.
  • the longitudinal axes 60 of the springs 14 remain generally parallel to the transverse seams 80 in the fabric 16. However, due to the expansion of the springs 14, the longitudinal seam 54 formed at the free edges 28 of the fabric 16 is positioned generally on a side face 88 of the string 12 of pocketed coil springs 14 between top and bottom ends 90, 92 of the pocketed coil spring 14 as shown particularly in Figs. 5 and 6. With the longitudinal axes 60 of the springs 14 generally aligned and parallel with one another within individual fabric pockets 86, the present invention avoids the need for turning the springs 14 within the fabric pockets 86 as is required in many prior art systems.
  • the longitudinal seam 54 preferably becomes attached to the pockets 86 when the transverse seam 80 is formed by the transverse seam forming station 78.
  • the longitudinal seam 54 in the region of the fabric 16 proximate the transverse seam 80, four layers of fabric 16 are welded together at the transverse seam forming station 78.
  • the longitudinal seam 54 could be positioned prior to entering the transverse seam forming station 78 even if it is not welded to the pockets 86 with the transverse seam 80.
  • the longitudinal seam 54 may be located anywhere between the top and bottom of the string although it is shown in the drawings as approximately in the middle thereof.
  • a downstream or second transport station 94 preferably includes a pair of oppositely rotating transport wheels 96 each with an axis 98 of rotation generally parallel to the longitudinal axes 60 of the springs 14.
  • a plurality of arcuate recesses 100 on the periphery of the transport wheels 96 cooperate to at least partially surround the pocketed springs 14 and advance them from the upstream transverse seam forming station 78 for discharge and subsequent packaging, storage or processing into a mattress, cushion or innerspring unit.
  • FIG. 3 and 4 An alternative embodiment of this invention is shown in Figs. 3 and 4 and components of the system 10 of Figs. 3 and 4 which are similar to those of the first embodiment shown in Figs. 1 and 2, are identified by identical reference numerals and the previous detailed description with respect to those items provided hereinabove is likewise applicable to the embodiment of Figs. 3 and 4.
  • the second presently preferred embodiment shown in Figs. 3 and 4 includes divergent transport bands 102 located above and below the fabric 16 and enclosed springs 14 at the spring expansion station 70.
  • the transport mechanism could be embodied with wheels as in Figs. 1 and 2 and/or transport bands as in Figs. 3 and 4 which are located on the too and bottom of the string or the lateral side surfaces as desired.
  • FIGs. 7 and 8 An additional feature of this invention is shown in Figs. 7 and 8 and is particularly adapted for use in constructing strings 12 of pocketed coil springs 14a having a barrel shaped configuration as shown in Fig. 7.
  • Barrel shaped springs 14a are well known in the industry and include a profile 108 in which the middle turns 110 of the spring 14a have a greater diameter than the top turn 112 and bottom turn 114 of the spring 14a.
  • the top and bottom turns 112, 114 of the barrel shaped spring 14a may have a diameter of about 1.625 inches (4.1275cm) and the middle turn 110 have a diameter of about 2.5 inches (6.35cm).
  • the transverse seam 80a adjacent to the spring 14a conforms to the profile 108 of the spring 1 4a as shown in Fig. 7. With the transverse seam 80a conforming to the profile 108 of the spring 14a encased in the pocket a tighter pocket is produced with less loose fabric 16 in the string 12 and a better overall product, especially with springs 14a having a non-linear profile.
  • the transverse seam 80a adjacent thereto has a concave shape and because the transverse seam 80a is located between adjacent barrel shaped springs 14a the seam 80a may have a pair of outwardly facing concave shapes forming an X or similar configuration.
  • a weld head 82a suitable for forming the transverse seam 80a is shown in Fig. 8 in which a number of studs 116 are arranged in the pattern shown so that adjacent studs 116 proximate the top and bottom of the weld head 82a are spaced farther apart than those in the middle to conform with the profiles 108 of the adjacent barrel shaped springs 14a.
  • the transverse seam 80a of Fig. 7 is symmetric, other configurations are contemplated.
  • this feature of the invention is useful not only for barrel shaped springs 14a to form a tighter, more conforming fabric pocket, but also for springs having a non-linear profile in general such as the barrel shaped springs and hour glass shaped springs in which the middle turns have a lesser diameter than the top and bottom turns.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Wire Processing (AREA)
  • Chain Conveyers (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Casting Devices For Molds (AREA)

Claims (32)

  1. Procédé permettant de former une bande de ressorts hélicoïdaux ensachés comportant l'avance d'une réserve de tissu (16) de telle manière à procurer une première et une deuxième couches de tissu en général parallèles (24, 26), l'insertion d'une série de ressorts comprimés de manière axiale (14, 14a) entre la première et la deuxième couches (24, 26), l'assemblage de la première et de la deuxième couches ensemble par la formation d'une couture longitudinale (54) à proximité des bords libres (28) de la première et de la deuxième couches (24, 26), les couches étant assemblées au niveau des bords opposés aux bords libres (28), la possibilité donnée aux ressorts (14, 14a) de se détendre au moins partiellement de manière axiale à l'intérieur du tissu dans la même orientation que celle adoptée lorsqu'ils sont insérés entre les couches (24, 26) de telle manière que l'axe longitudinal (60) de chacun des ressorts est en général perpendiculaire par rapport à la couture longitudinale (54), et la formation d'une couture transversale (80, 80a) dans le tissu entre des ressorts adjacents (14, 14a) afin, de ce fait, de renfermer chacun des ressorts à l'intérieur d'une poche de tissu (86), caractérisé en ce que les ressorts (14, 14a) ont la possibilité de se détendre au moins partiellement après l'assemblage de la première et de la deuxième couches (24, 26) par la formation de la couture longitudinale (54), et en ce que les coutures transversales (80, 80a) sont formées en général de manière parallèle par rapport aux axes longitudinaux (60) des ressorts détendus au moins partiellement (14, 14a).
  2. Procédé selon la revendication 1, dans lequel les ressorts (14, 14a) ont la possibilité de se détendre au moins partiellement avant la formation des coutures transversales (80, 80a).
  3. Procédé selon la revendication 1 ou la revendication 2, dans lequel les ressorts (14, 14a) ont la possibilité de se détendre le long de leurs axes longitudinaux (60).
  4. Procédé selon la revendication 2, dans lequel les ressorts (14, 14a) ont la possibilité de se détendre dans la même orientation que celle adoptée lorsqu'ils sont insérés entre les couches (24, 26).
  5. Procédé selon l'une quelconque des revendications précédentes, dans lequel l'orientation des axes longitudinaux (60) des ressorts (14, 14a) reste en général inchangée au cours de l'intégralité du processus.
  6. Procédé selon l'une quelconque des revendications précédentes, dans lequel la détente des ressorts (14, 14a) est contrôlée par une paire d'organes rotatifs (72, 102) sur les côtés opposés des ressorts à l'intérieur du tissu.
  7. Procédé selon la revendication 6, dans lequel les axes de rotation des organes rotatifs (72) sont en général parallèles par rapport aux axes longitudinaux (60) des ressorts et chaque organe rotatif (72) comporte une pluralité d'évidements à forme arquée (76) qui se combinent pour entourer partiellement chaque ressort.
  8. Procédé selon la revendication 6, dans lequel les axes de rotation des organes rotatifs sont en général perpendiculaires par rapport aux axes longitudinaux (60) des ressorts et chaque organe rotatif comporte une courroie (102) passant sur des rouleaux espacés (104, 106), dans lequel une distance de séparation entre les courroies (102) augmente en direction de l'aval afin, de ce fait, de contrôler la détente des ressorts (14, 14a) entre les courroies.
  9. Procédé selon l'une quelconque des revendications précédentes, comportant par ailleurs le tirage du tissu entre une paire d'organes de transport rotatifs (96) espacés sur les côtés opposés du tissu et situés en aval d'une position à laquelle les coutures transversales (80, 80a) sont formées, les organes de transport rotatifs (96) comportant une pluralité d'évidements à forme arquée (100) qui se combinent pour entourer partiellement chaque ressort.
  10. Procédé selon la revendication 9, dans lequel l'étape de tirage du tissu est réalisée après la formation des coutures transversales (80, 80a).
  11. Procédé selon l'une quelconque des revendications précédentes, dans lequel l'insertion comporte par ailleurs l'insertion des ressorts comprimés (14a) qui ont un profil en général de forme non linéaire de manière adjacente à la couture transversale et dans lequel la formation de la couture transversale comporte par ailleurs la formation de la couture transversale (80a) afin de correspondre en général à au moins une portion du profil des ressorts adjacents (14a).
  12. Procédé selon la revendication 11, dans lequel les ressorts (14a) insérés sont en forme de fût.
  13. Procédé selon l'une quelconque des revendications 1 à 10, dans lequel l'insertion comporte par ailleurs l'insertion des ressorts comprimés en forme de fût (14a) et dans lequel la formation de la couture transversale comporte par ailleurs la formation de la couture transversale (80a) afin d'obtenir une configuration en général concave de manière adjacente aux ressorts en forme de fût (14a).
  14. Procédé selon l'une quelconque des revendications précédentes, dans lequel le tissu est un tissu thermosoudable (16) et dans lequel les étapes d'assemblage et de formation sont réalisées par le soudage du tissu.
  15. Procédé selon l'une quelconque des revendications précédentes, dans lequel l'étape d'avance du tissu comporte le pliage du tissu (16) autour d'une ligne de pliage longitudinale (22) dans la première et la deuxième couches (24, 26) de telle manière que les bords opposés sont joints par la ligne de pliage (22).
  16. Procédé selon l'une quelconque des revendications précédentes, dans lequel la couture longitudinale (54) est positionnée en général sur le côté des ressorts (14, 14a) entre l'extrémité supérieure et l'extrémité inférieure de ceux-ci dans la bande (12) de ressorts hélicoïdaux ensachés qui est formée.
  17. Système permettant de former une bande (12) de ressorts hélicoïdaux ensachés, chacun des ressorts (14, 14a) étant renfermé à l'intérieur d'une poche (86) formée de tissu, le système comportant une station de réserve de tissu destinée à fournir la première et la deuxième couches de tissus en général parallèles (24, 26), une station d'insertion des ressorts (34) au niveau de laquelle les ressorts comprimés de manière axiale (14, 14a) sont insérés individuellement entre la première et la deuxième couches (24, 26), une station de formation des coutures longitudinales (52) située en aval de la station d'insertion des ressorts (34), la station de formation des coutures longitudinales (52) effectuant l'assemblage de la première et de la deuxième couches (24, 26) du tissu ensemble par la formation d'une couture longitudinale (52) à proximité des bords libres (28) de la première et de la deuxième couches, les couches étant assemblées au niveau des bords opposés aux bords libres, une station de détente des ressorts (70) donnant aux ressorts (14, 14a) la possibilité de se détendre au moins partiellement entre la première et la deuxième couches (24, 26) dans la même orientation que celle adoptée lorsqu'ils sont insérés entre les couches (24, 26) de telle manière que l'axe longitudinal (60) de chaque ressort est en général perpendiculaire par rapport à la couture longitudinale (54), une station de formation des coutures transversales (78) formant une couture transversale (80, 80a) dans le tissu afin de séparer chaque paire de ressorts adjacents (14, 14a) et afin, de ce fait, de renfermer chacun des ressorts à l'intérieur d'une poche de tissu (86) lorsqu'il y est inséré, et une station de transport (62, 94) qui fait avancer le tissu (16) et les ressorts (14, 14a) s'y trouvant au travers des différentes stations, caractérisé en ce que la station de détente des ressorts est en aval de la station de formation des coutures longitudinales, et en ce que la station de formation des coutures transversales (78) forme les coutures transversales (80, 80a) en général de manière parallèle par rapport aux axes longitudinaux (60) des ressorts détendus au moins partiellement.
  18. Système selon la revendication 17, dans lequel la station de formation des coutures transversales (78) est en aval de la station de détente des ressorts (70).
  19. Système selon la revendication 17 ou la revendication 18, dans lequel la station de détente des ressorts (70) donne aux ressorts la possibilité de se détendre le long de leurs axes longitudinaux (60).
  20. Système selon l'une quelconque des revendications 17 à 19, dans lequel les ressorts (14, 14a) ont la possibilité de se détendre dans la même orientation que celle adoptée lorsqu'ils sont insérés entre les couches (24, 26).
  21. Système selon l'une quelconque des revendications 17 à 20, dans lequel l'orientation des axes longitudinaux (60) des ressorts (14, 14a) reste en général inchangée depuis la station d'insertion des ressorts (34) jusqu'à la formation de la bande (12) de ressorts hélicoïdaux ensachés.
  22. Système selon l'une quelconque des revendications 17 à 21, dans lequel la station de transport (62, 94) comporte par ailleurs une paire d'organes de transport rotatifs (96) espacés sur les côtés opposés du tissu et situés en aval de la station de détente des ressorts (70), les organes de transport rotatifs (96) comportant une pluralité d'évidements à forme arquée (100) qui se combinent pour entourer partiellement chaque ressort (14, 14a) et le tissu enveloppant afin, de ce fait, de tirer le tissu et les ressorts s'y trouvant au travers des différentes stations.
  23. Système selon l'une quelconque des revendications 17 à 22, dans lequel la station de détente des ressorts (70) comporte par ailleurs une paire d'organes rotatifs (72, 102) sur les côtés opposés des ressorts (14, 14a) à l'intérieur du tissu.
  24. Système selon la revendication 23, dans lequel les axes de rotation des organes rotatifs (72) sont en général parallèles par rapport aux axes longitudinaux (60) des ressorts et chaque organe rotatif (72) comporte une pluralité d'évidements à forme arquée (76) qui se combinent pour entourer partiellement chaque ressort.
  25. Système selon la revendication 24, dans lequel les axes de rotation des organes rotatifs (102) sont en général perpendiculaires par rapport aux axes longitudinaux (60) des ressorts et chaque organe rotatif comporte une courroie (102) passant sur des rouleaux espacés montés de manière rotationnelle (104, 106), dans lequel une distance de séparation entre les courroies (102) augmente en direction de l'aval afin, de ce fait, de contrôler la détente des ressorts (14, 14a) entre les courroies (102).
  26. Système selon l'une quelconque des revendications 17 à 25, dans lequel la station de formation des coutures transversales (78) forme une couture transversale (80a) qui est conforme à un profil non linéaire du ressort adjacent (14a).
  27. Système selon l'une quelconque des revendications 17 à 26, dans lequel la station de formation des coutures longitudinales (52) et la station de formation des coutures transversales (78) comportent chacune par ailleurs un ensemble coopérant de tête et enclume de thermosoudage (56, 58, 82, 84) destiné à former des thermosoudures dans le tissu.
  28. Bande (12) de ressorts hélicoïdaux ensachés comportant deux couches de tissu allongées (24, 26) assemblées ensemble par une couture longitudinale (54) à proximité des bords libres (28) des couches, les couches (24, 26) étant assemblées au niveau des bords opposés aux bords libres et ayant des coutures transversales (80, 80a) afin de former des poches (86), et, un ressort (14, 14a) encastré dans chaque poche et ayant un axe longitudinal (60) en général perpendiculaire par rapport à la couture longitudinale (54), la couture longitudinale (54) étant positionnée sur le côté des ressorts entre les extrémités de ceux-ci, caractérisée en ce que le tissu entre le bord libre (28) de chaque couche et la couture longitudinale (54) est plié pour recouvrir l'autre afin de former une bandelette à deux couches en contact avec les poches (86) et la bandelette est attachée aux poches (86) par les coutures transversales (80, 80a).
  29. Bande selon la revendication 28, dans laquelle la couture longitudinale (54) est positionnée approximativement à mi-chemin entre les extrémités des ressorts (14, 14a).
  30. Bande selon la revendication 28 ou la revendication 29, dans laquelle le tissu (16) est thermosoudable et les coutures (54, 80, 80a) sont des thermosoudures.
  31. Bande selon l'une quelconque des revendications 28 à 30, dans laquelle les bords opposés des couches (24, 26) sont intégrés.
  32. Bande selon l'une quelconque des revendications 28 à 31, dans laquelle chacun des ressorts (14a) a un profil non linéaire entre une extrémité supérieure et une extrémité inférieure de ceux-ci et les coutures transversales (80a) ont un profil non linéaire conforme à celui des ressorts.
EP00911198A 1999-04-16 2000-03-31 Procede et systeme permettant de former des bandes de ressorts helicoidaux ensaches Expired - Lifetime EP1171377B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE60015318T DE60015318T3 (de) 1999-04-16 2000-03-31 Verfahren und system zum herstellen einer kette von taschenfedern

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US29322199A 1999-04-16 1999-04-16
US293221 1999-04-16
US09/353,483 US6336305B1 (en) 1999-04-16 1999-07-13 System for forming strings of pocketed coil springs
US353483 1999-07-13
PCT/IB2000/000396 WO2000063113A1 (fr) 1999-04-16 2000-03-31 Procede et systeme permettant de former des bandes de ressorts helicoidaux ensaches

Publications (3)

Publication Number Publication Date
EP1171377A1 EP1171377A1 (fr) 2002-01-16
EP1171377B1 true EP1171377B1 (fr) 2004-10-27
EP1171377B2 EP1171377B2 (fr) 2012-06-13

Family

ID=23128205

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00911198A Expired - Lifetime EP1171377B2 (fr) 1999-04-16 2000-03-31 Procede et systeme permettant de former des bandes de ressorts helicoidaux ensaches

Country Status (14)

Country Link
EP (1) EP1171377B2 (fr)
JP (1) JP4377074B2 (fr)
CN (1) CN1251959C (fr)
AT (1) ATE280735T1 (fr)
AU (1) AU3318900A (fr)
BR (1) BR0009482A (fr)
CA (1) CA2368852C (fr)
DE (1) DE60015318T3 (fr)
ES (1) ES2232431T5 (fr)
GB (1) GB2358796B (fr)
MX (1) MXPA01010382A (fr)
PT (1) PT1171377E (fr)
TR (1) TR200102879T2 (fr)
WO (1) WO2000063113A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6591436B2 (en) * 1999-04-16 2003-07-15 Spuhl Ag St. Gallen Side seam pocketed coil springs
US6260331B1 (en) * 1999-06-17 2001-07-17 Sidhil Technology, Llc Method and apparatus for the manufacture of pocketed springs
GB2358349B (en) * 2000-10-12 2001-12-12 Spuhl Ag St Gallen Method and system for forming strings of pocketed coil springs
SE530089C2 (sv) * 2004-10-18 2008-02-26 Stjernfjaedrar Ab Resårmadrass, såsom pocketmadrass, metod för tillverkning av sådan resårmadrass samt anordning för tillverkning av sådan resårmadrass
CN101955150B (zh) * 2010-07-30 2012-11-14 严卓晟 连续滚动袋装弹簧机
PL2565152T3 (pl) * 2011-08-30 2014-11-28 Spuehl Ag Urządzenie do tworzenia rękawa z materiału kieszeni i sposób wytwarzania rzędu sprężyn kieszeniowych
US9427090B2 (en) * 2013-06-19 2016-08-30 L&P Property Management Company Pocketed spring assembly comprising strings of springs having Y-shaped seams
CN106185780A (zh) * 2016-06-28 2016-12-07 广州市联柔机械设备有限公司 双层布袋弹簧制作装置及方法
CN113840797B (zh) * 2019-05-14 2023-11-14 贝卡尔特公司 袋装弹簧线轴
KR102134553B1 (ko) * 2020-02-13 2020-07-16 김선용 포켓 스프링 자동 정렬 인입장치
CN112596161B (zh) * 2020-12-21 2023-03-24 成都市加朗星科技有限公司 一种多层结构的模斑转换器及其实现方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439977A (en) † 1977-05-05 1984-04-03 Simmons U.S.A. Corporation Method and apparatus for making a series of pocketed coil springs
US4234983A (en) 1978-10-02 1980-11-25 Simmons Company Thermally welded spring pockets
US4584023A (en) † 1984-10-31 1986-04-22 Chevron Research Company Method for producing industrial asphalts without air-blowing using phytic acid
US5613287A (en) 1995-06-07 1997-03-25 Simmons Company Method for forming strings of pocketed springs
US5749133A (en) * 1996-09-10 1998-05-12 Simmons Company Method and apparatus for forming strings of pocketed springs
SE508801C2 (sv) * 1997-12-19 1998-11-09 Stjernfjaedrar Ab Dubbelfjädermadrass samt tillverkningsmetod för en sådan madrass

Also Published As

Publication number Publication date
GB0108713D0 (en) 2001-05-30
JP4377074B2 (ja) 2009-12-02
PT1171377E (pt) 2005-04-29
AU3318900A (en) 2000-11-02
CA2368852A1 (fr) 2000-10-26
ES2232431T5 (es) 2012-10-22
EP1171377B2 (fr) 2012-06-13
TR200102879T2 (tr) 2002-04-22
DE60015318T2 (de) 2005-11-24
ES2232431T3 (es) 2005-06-01
GB2358796A (en) 2001-08-08
CA2368852C (fr) 2008-12-16
DE60015318T3 (de) 2012-11-08
ATE280735T1 (de) 2004-11-15
CN1355766A (zh) 2002-06-26
DE60015318D1 (de) 2004-12-02
GB2358796B (en) 2001-12-12
MXPA01010382A (es) 2002-03-27
BR0009482A (pt) 2002-03-26
JP2002541943A (ja) 2002-12-10
CN1251959C (zh) 2006-04-19
EP1171377A1 (fr) 2002-01-16
WO2000063113A1 (fr) 2000-10-26

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