EP1477322B1 - Méthode et appareil pour produire livres à partir d'une pile de feuilles cousus - Google Patents

Méthode et appareil pour produire livres à partir d'une pile de feuilles cousus Download PDF

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Publication number
EP1477322B1
EP1477322B1 EP20040425315 EP04425315A EP1477322B1 EP 1477322 B1 EP1477322 B1 EP 1477322B1 EP 20040425315 EP20040425315 EP 20040425315 EP 04425315 A EP04425315 A EP 04425315A EP 1477322 B1 EP1477322 B1 EP 1477322B1
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EP
European Patent Office
Prior art keywords
sewing
bookmaking
crochet
signature
signatures
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.)
Expired - Lifetime
Application number
EP20040425315
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German (de)
English (en)
Other versions
EP1477322A1 (fr
Inventor
Giovanni Ghilardi
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.)
Meccanotecnica SpA
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Meccanotecnica SpA
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Publication of EP1477322A1 publication Critical patent/EP1477322A1/fr
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Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42B—PERMANENTLY ATTACHING TOGETHER SHEETS, QUIRES OR SIGNATURES OR PERMANENTLY ATTACHING OBJECTS THERETO
    • B42B2/00—Permanently attaching together sheets, quires or signatures by stitching with filamentary material, e.g. textile threads
    • B42B2/02—Machines for stitching with thread
    • B42B2/08—Machines for stitching with thread with devices for forming safety knots or with tying mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42B—PERMANENTLY ATTACHING TOGETHER SHEETS, QUIRES OR SIGNATURES OR PERMANENTLY ATTACHING OBJECTS THERETO
    • B42B2/00—Permanently attaching together sheets, quires or signatures by stitching with filamentary material, e.g. textile threads
    • B42B2/02—Machines for stitching with thread
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42B—PERMANENTLY ATTACHING TOGETHER SHEETS, QUIRES OR SIGNATURES OR PERMANENTLY ATTACHING OBJECTS THERETO
    • B42B9/00—Devices common to machines for carrying out the processes according to more than one of the preceding main groups
    • B42B9/04—Devices common to machines for carrying out the processes according to more than one of the preceding main groups for conveying downwardly-open signatures

Definitions

  • the object of the present invention is a method and a device to make books from a stack of mutually sewn signatures, with a sewing thread being interrupted at each group of signatures making up a book.
  • the sewing machine generally comprises a moving saddle upon which the open signature to be sewn is arranged.
  • the moving saddle performs a motion according to the following steps: closed saddle (where the sewing takes place), opening, open saddle (where the moving saddle is aligned with a stationary saddle to receive a new signature to be sewn) and closure.
  • This preset number may also be small, such as three or four signatures, for example as in case of children's books.
  • the signature groups in the stack are picked up one by one from the stack to be sent to subsequent working.
  • DE-C-645 932 discloses the preamble of claims 1 and 13.
  • Patent application IT1998MI01878 illustrates a further procedure wherein each signature group making up a book is secured on the spine with a piece of adhesive tape before the group itself leaves the sewing machine.
  • This procedure also entails several drawbacks because suitable devices are required to distribute and cut the adhesive tape, the practice of which is rather laborious.
  • the tape characteristics are not constant, particularly its adhesive power depends, inter alia, on the climate.
  • the presence of lengths of adhesive tape on the book spine is not always welcomed by the bookbinders, since they may not be completely hidden by the following bookmaking steps.
  • the problem at the heart of the present invention is to provide a method to make books starting from a stack of mutually sewn signatures, the characteristics of which are such to meet the above requirement, and in the meantime to overcome the drawbacks mentioned above with reference to the prior art.
  • the signatures 10 are mutually sewn along their spines within a sewing machine 14, such as schematically illustrated in Figure 1 .
  • the sewing machine 14 comprises a signature feeding device 16, a signature opening device 18 adapted to unload the open signature astride a stationary saddle 20 along which the signatures are caused to slide. From the stationary saddle 20, the signatures are transferred to a moving saddle 22 belonging to the actual sewing machine.
  • the moving saddle 22 is adapted to perform a motion according to arrows 24 to approach a sewing device, not completely illustrated in Figure 1 .
  • the sewing device is schematically illustrated in the subsequent figures and comprises a series of awls 26 arranged inside the moving saddle 22 in a lower portion of the device itself such that the pointed ends face the inside of the signature being sewn.
  • the sewing device further comprises a shuttle 28 also arranged in a lower portion of the sewing device and adapted to translate horizontally.
  • an alternate series of needles 30 and sewing crochets 32 assembled in an upper portion or carriage of the sewing device is provided.
  • the crochets 32 are assembled to the sewing device such as to be caused to rotate around a longitudinal axis thereof according to what will be for example described herein below.
  • Figure 2 illustrates a first step of signature sewing where the awls 26 punch the signature spine for the needles 30 and the sewing crochets 32 to be driven therethrough.
  • Figure 3 illustrates a subsequent step where the needles 30 and the sewing crochets 32 are lowered and driven at the perforations provided by the awls 26. At the same time, the sewing crochets 32 start rotating slightly around the longitudinal axis thereof.
  • Figure 4 illustrates a subsequent step of the signature sewing where the shuttles 28 perform a horizontal movement inside the signature being sewn by gripping the loop formed between the needles 30 and the signature spine and widening it until reaching the adjacent sewing crochet 32. In the meantime, the sewing crochet 32 will complete its rotation around the longitudinal axis and grip the thread.
  • FIG 5 the final step of signature sewing is shown where the upper portion of the sewing device is raised and taken off from the signature.
  • the sewing crochets 32 pull the respective thread and cause it to pass through the chain stitch formed during the previous sewing cycle.
  • the shuttle 28 goes back to the starting position to start another cycle.
  • Figure 6 illustrates the step where the last sewing cycle has been completed by sewing the last signature in the group 12 making up the book.
  • the last signature is designated with the numeral 10a.
  • the sewing crochet 32 rotates by about 90° as indicated by the arrow 34 and a secondary, horizontally arranged crochet 36 translates towards the needle 30 and is inserted in the chain stitch on the sewing crochet 32.
  • the chain stitch on the sewing crochet 32 is designated with the numeral 38.
  • the secondary crochet 36 While translating to the needle 30, the secondary crochet 36 rotates around its own axis and grips a thread portion 40 that emerges from the last signature 10a and is inserted in the needle 30.
  • two moments of these steps are illustrated at the same time.
  • the secondary crochet 36 is illustrated both on the right in figure 6 , at the moment when it is inserted in the chain stitch 38 at the sewing crochet 32, and on the left in figure 6 at the moment when after rotating around its own axis it grips the thread portion 40.
  • the secondary crochet 36 then returns to the starting position by rotating in the opposite direction to the outward stroke.
  • the secondary crochet 36 pulls the thread portion 40 through the chain stitch 38 such as illustrated in Figure 7 .
  • the thread portion 40 stretches, thus forming a lower length 40a from the signature 10a to the chain stitch 38 and an upper length 40b from the chain stitch 38 to the needle 30.
  • a cutting device 42 is advantageously provided between the needle 30 and the crochet 32 and is adapted to be inserted below the upper length 40b of thread portion 40.
  • Figure 8 illustrates the subsequent step where the upper portion or carriage of the sewing device has been lowered to sew the first signature in the next group, which is indicated with the numeral 10b.
  • the lower length 40a extends from the signature 10a to the secondary crochet 36 passing through the chain stitch 38.
  • the upper length 40b extends from the secondary crochet 36 to the needle eye 30 which has been lowered into the first signature 10b of the next group.
  • the upper length 40b passes through the chain stitch 38 and over the cutting device 42 while being lowered into the signature 10b.
  • the crochet 32 leaves the corresponding chain stitch 38 close to that formed by the secondary crochet 36 and rotates before being lowered.
  • the cutting device 42 can be of the active type, e.g. comprising shears to cut the upper portion 48b in response to a preset command.
  • the cutting device 42 is of the passive type, e.g. such as comprising a knife. In the latter case, the thread fitted on the knife is cut due to the backward movement of the signatures as further signatures are sewn.
  • Figure 10 illustrates a schematic top view of the last step where, while the next signature group is being carried out from a thread portion 44, the previous group has a chain stitch 38 where the thread portion 40 is inserted. Both adjacent signature groups are mutually independent, and hence they are not connected by the thread.
  • the method for making books starting from a stack of mutually sewn signatures provides that, after the moving saddle has moved away from the sewing device and the last signature 10a of the group has been forced back for example by a spine-pushing bar to the sewing machine outlet, the needles and the sewing crochets are lowered again below a so-called sewing comb while the moving saddle aligns with the stationary saddle.
  • the exchange of the thread from the needle to the crochet to make the empty stitch can take place in several ways.
  • a first embodiment provides that a needle is used which can turn to the direction of the respective sewing crochet.
  • a different embodiment provides for several shuttles to be housed in the spine-pushing bar of the sewing machine.
  • a further embodiment provides that the passage from the needle to the crochet takes place by a jet of air forcing the thread according to the teachings of the patent application CH19960002331 .
  • the present invention provides a method for making books from a stack of mutually sewn signatures, with the sewing thread being interrupted at each group of signatures making up a book, wherein a step of carrying out an empty stitch is provided to anchor the thread end to the last signature in the group and wherein this step is advantageously carried out when the moving saddle is not in the closed position below the sewing device.
  • the step of making an empty stitch at the last signature in a group is carried out making use of the three steps of opening, open saddle and closure performed by the moving saddle to receive another signature to be sewn from the stationary saddle.
  • providing a method according to the present invention allows to meet the above-mentioned requirement of securing the last signature in the group making up the book, thus eliminating the risk of loosing it during the subsequent working steps. This is achieved reliably and without prolongation of the manufacturing time, namely in the case of books with a small number of signatures in which the time to make the so-called empty stitch would sensibly weigh on the manufacturing time.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Claims (20)

  1. Procédé de production de livres à partir d'une pile de cahiers (10) cousus les uns aux autres, le fil à coudre étant interrompu au niveau de chaque groupe (12) de cahiers formant un livre, le procédé comprenant les étapes consistant à :
    ouvrir les cahiers (10) et les acheminer séquentiellement vers une selle mobile (22) d'une couseuse (14), ladite selle mobile (22) étant adaptée pour se déplacer entre une position de réception de cahiers et une position de couture de cahiers ;
    coudre la série de cahiers (10) en un groupe (12) formant le livre ;
    fixer le fil à coudre après un dernier cahier (10a) dans le groupe en réalisant un point à vide,
    caractérisé en ce que ladite étape au cours de laquelle un point à vide est formé est exécutée dans un intervalle compris entre trois étapes de déplacement de la selle mobile (22) de la position de couture à la position de réception des cahiers (10) et vice-versa, correspondant aux étapes : d'ouverture de la selle mobile, de selle mobile ouverte et de fermeture de la selle mobile.
  2. Procédé de production de livres selon la revendication 1, dans lequel ledit point à vide est formé lorsqu'une partie supérieure ou chariot d'un dispositif de couture comprenant des aiguilles (30) et un crochet à coudre (32) est dans la position haute.
  3. Procédé de production de livres selon la revendication 2, dans lequel ledit point à vide est exécuté au moyen d'un crochet secondaire (36) adapté pour être inséré dans un dernier point de chaînette (38) émergeant d'un dernier cahier (10a) dans le groupe et pour saisir une partie de fil (40) qui émerge du dernier cahier (10a) et qui est enfilée dans l'aiguille respective (30).
  4. Procédé de production de livres selon la revendication 3, dans lequel ledit point à vide est formé en coupant ladite partie de fil (40) et en désenfilant en outre ledit crochet secondaire (36) du dernier point de chaînette (38).
  5. Procédé de production de livres selon la revendication 4, dans lequel ladite partie de fil (40) est coupée à une longueur (40b) s'étendant du crochet secondaire (36) à l'aiguille (30).
  6. Procédé de production de livres selon la revendication 4, dans lequel ladite partie de fil (40) est coupée à une longueur supérieure (40b) de celui-ci.
  7. Procédé de production de livres selon la revendication 4, dans lequel ladite partie de fil (40) est coupée en actionnant un dispositif de coupe actif.
  8. Procédé de production de livres selon la revendication 4, dans lequel ladite partie de fil (40) est coupée au moyen d'un dispositif de coupe passif (42) suite au mouvement de translation du groupe de cahiers.
  9. Procédé de production de livres selon la revendication 1, dans lequel ledit point à vide est formé en abaissant une partie supérieure ou chariot d'un dispositif de couture comprenant des aiguilles (30) et un crochet de couture (32).
  10. Procédé de production de livres selon la revendication 9, dans lequel ledit point à vide est formé au moyen d'une aiguille qui peut être orientée vers le crochet de couture respectif.
  11. Procédé de production de livres selon la revendication 9, dans lequel ledit point à vide est formé au moyen de navettes logées dans un poussoir de dos de la couseuse.
  12. Procédé de production de livres selon la revendication 9, dans lequel ledit point à vide est formé en échangeant le fil entre l'aiguille (30) et le crochet de couture respectif (32) un jet d'air poussant le fil.
  13. Dispositif de production de livres à partir d'une pile de cahiers cousus les uns aux autres, le fil à coudre étant interrompu au niveau de chaque groupe de cahiers formant un livre, le dispositif comprenant une selle mobile (22) destinée à transférer les cahiers ouverts depuis une selle fixe jusqu'à un dispositif de couture muni d'une série alterne d'aiguilles (30) et de crochets de couture (32),
    caractérisé en ce qu'il comprend des moyens de formation de points à vide pendant un intervalle compris entre trois étapes de déplacement de la selle mobile (22) de la position de couture à la positon de réception de cahiers (10) et vice-versa correspondant aux étapes : d'ouverture de la selle mobile, de selle mobile ouverte et de fermeture de la selle mobile.
  14. Dispositif de production de livres selon la revendication 13, dans lequel lesdits moyens de formation de points à vide comprennent au moins un crochet secondaire (36) qui peut être déplacé par rapport à un crochet de couture correspondant (32) afin de saisir une partie de fil (40) au niveau de l'aiguille (30) et de l'insérer dans un dernier point de chaînette (38) émergeant d'un dernier cahier (10a).
  15. Dispositif de production de livres selon la revendication 14, dans lequel lesdits moyens de formation d'un point à vide comprennent au moins un dispositif de coupe (42) destiné à couper une longueur (40b) de la partie de fil (40).
  16. Dispositif de production de livres selon la revendication 15, dans lequel ledit dispositif de coupe (42) est du type passif qui exécute la coupe suite au déplacement des groupes de cahiers cousus.
  17. Dispositif de production de livres selon la revendication 15, dans lequel ledit dispositif de coupe (42) est du type actif qui exécute la coupe suite à une commande préétablie.
  18. Dispositif de production de livres selon la revendication 13, dans lequel lesdits moyens de formation de point à vide comprennent une aiguille adaptée pour être orientée vers un crochet de couture correspondant.
  19. Dispositif de production de livres selon la revendication 13, dans lequel lesdits moyens de formation de point à vide comprennent des navettes logées dans un poussoir de dos de la couseuse.
  20. Dispositif de production de livres selon la revendication 13, dans lequel lesdits moyens de formation de points à vide comprennent des moyens de création d'un jet d'air poussant le fil de l'aiguille (30) vers le crochet de couture (32).
EP20040425315 2003-05-12 2004-05-04 Méthode et appareil pour produire livres à partir d'une pile de feuilles cousus Expired - Lifetime EP1477322B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20030945 ITMI20030945A1 (it) 2003-05-12 2003-05-12 Metodo e dispositivo per confezionare libri a partire da un impilamento di segnature tra loro cucite
ITMI20030945 2003-05-12

Publications (2)

Publication Number Publication Date
EP1477322A1 EP1477322A1 (fr) 2004-11-17
EP1477322B1 true EP1477322B1 (fr) 2008-04-02

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EP20040425315 Expired - Lifetime EP1477322B1 (fr) 2003-05-12 2004-05-04 Méthode et appareil pour produire livres à partir d'une pile de feuilles cousus

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EP (1) EP1477322B1 (fr)
DE (1) DE602004012791T2 (fr)
IT (1) ITMI20030945A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20110935A1 (it) 2010-09-03 2012-03-04 Meccanotecnica Spa Macchina da legatoria combinata con composizione automatica delle segnature
EP2524813B1 (fr) 2011-05-17 2016-03-23 Müller Martini Holding AG Procédé de fabrication d'une brochure reliée
ITTO20110673A1 (it) * 2011-07-25 2013-01-26 Smyth S R L Macchina cucitrice per segnature
IT201600076770A1 (it) * 2016-07-21 2018-01-21 Meccanotecnica Spa Dispositivo di presa per filo di cucitura in macchina cucitrice da legatoria
IT201600076757A1 (it) * 2016-07-21 2018-01-21 Meccanotecnica Spa Cucitura di blocchi libro senza punto a vuoto
KR101938139B1 (ko) * 2017-07-06 2019-01-15 한국생산기술연구원 유한 길이 섬유의 자동매듭 결속기 및 이를 이용한 유한 길이 섬유의 결속방법
WO2021130360A1 (fr) * 2019-12-27 2021-07-01 Meccanotecnica S.P.A. Dispositif de préhension de fil de couture pour machine à relier avec jet de gaz
WO2021130362A1 (fr) * 2019-12-27 2021-07-01 Meccanotecnica S.P.A. Dispositif de mise à niveau de cahiers sur un chariot mobile d'une machine à coudre de reliure avec jet de gaz
IT202100004490A1 (it) 2021-02-25 2022-08-25 Meccanotecnica Spa Cucitura di blocchi libro senza punto a vuoto tramite uncini

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE645932C (de) * 1930-10-23 1937-06-05 Martinii Buchbindereimaschinen Vorrichtung zum selbsttaetigen Zerschneiden der Naehfaeden der nebeneinander zusammenhaengend gehefteten Buchblocks bei Fadenbuchheftmaschinen
DE632910C (de) * 1931-05-07 1936-07-20 Martini Buchbindermaschf Verfahren zum selbsttaetigen Zerschneiden der Naehfaeden der nebeneinander zusammenhaengend gehefteten Buchblocks in Fadenbuchheftmaschinen und Fadenbuchheftmaschine zur Ausfuehrung des Verfahrens
DE644071C (de) * 1936-02-28 1937-04-24 Brehmer Geb Heftmaschine
DE656058C (de) * 1936-03-12 1938-01-28 Brehmer Geb Bogenfuehrung fuer das selbsttaetige Einbringen von Lagen auf den Schwingsattel von Buchheftmaschinen
CH536724A (de) * 1972-04-11 1973-05-15 Martini Buchbindermaschf Heftaggregat

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Publication number Publication date
EP1477322A1 (fr) 2004-11-17
DE602004012791D1 (de) 2008-05-15
DE602004012791T2 (de) 2009-04-30
ITMI20030945A1 (it) 2004-11-13

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