US3797419A - Automatic machine for feeding and sewing signatures in books - Google Patents

Automatic machine for feeding and sewing signatures in books Download PDF

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Publication number
US3797419A
US3797419A US00378864A US3797419DA US3797419A US 3797419 A US3797419 A US 3797419A US 00378864 A US00378864 A US 00378864A US 3797419D A US3797419D A US 3797419DA US 3797419 A US3797419 A US 3797419A
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Prior art keywords
sewing
signatures
saddle
sewing machine
book
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Expired - Lifetime
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US00378864A
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English (en)
Inventor
L Depetris
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SMYTH EUROPEA SpA
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SMYTH EUROPEA SpA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/30—Opening devices for folded sheets or signatures
    • B65H5/305—Opening devices for folded sheets or signatures comprising rotary means for opening the folded sheets
    • 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

Definitions

  • PATENTEDHAR 19 I974 sum 05 or 11 PATENTEDMAR 19 m4 3.791419 sum as or 11 FIG- 6 PATENTEDHAR 1 9 1914 37973119 SHEET 0? or 11 Pmimsnm 19 1914 3797.419
  • the present invention relates to book sewing machines having means for automatically feeding and sewing signatures in books.
  • Such machines comprise two main parts, a sewing machine part and an automatic feeder part, normally controlled by a programmer.
  • the sewing machine or sewer part includes means for perforating the backs of the signatures, means for joining the signatures to other signatures by sewing, means for pasting the backs of a group of sewn signatures, and automatic thread-cutting and discharge means for the completed books when sewn.
  • An essential part of the sewing machine part is the so-called saddle; this includes a fixed part or fixed saddle which is positioned laterally displaced from the zone in which the sewing is effected, and a movable saddle, the sewing saddle, which moves reciprocally between a position in which it is aligned with the fixed saddle, and a position in which it is located adjacent the perforators and sewing devices of the sewing machine part.
  • Signatures open in a suitable manner are deposited from above onto the fixed saddle and are then moved by suitable transporters onto the movable saddle.
  • the feeder automatically picks up the signatures from a loader, opens them in the appropriate manner, and places them astride the fixed saddle, from where they are moved by the abovementioned transporters onto the movable saddle when this in the above mentioned position aligned with the fixed saddle.
  • the automatic feeder generally also includes a programmer installation, which may be mechanical, electromechanical or electronic, which co-ordinates the various operations of the feeder.
  • Known transporters can only operate on one signa ture at a time so that the movable saddle can receive signatures only one at a time.
  • a book sewing machine having automatic means for transporting signatures from a stack thereof and sewing them into books, of the type comprising a feeder part for the signatures, the feeder having means for opening the signatures along their centre line and for moving them into a movable sewing saddle of a sewing machine part, the
  • sewing saddle being reciprocably movable between a first position in which the top of the saddle is adjacent sewing devices of the sewing machine part, and a second position angularly displaced with respect to the first position, is characterised in that the movable saddle moves in a direction transverse the ridge of the saddle and the signature feeder part of the machine is so arranged with respect to the sewing machine part and is synchronised therewith in such a manner that the signatures are fed down from the feeder in an open position to be placed directly onto the movable saddle of the sewing machine part by the feeder part.
  • the said, feeder part is operative to place signatures onto the sewing saddle whilst the saddle is in the said second position thereof.
  • the feeder comprises means for supporting two stacks of signatures, one each on respective sides of the median longitudinal plane of the machine, gripper'means for simultaneously withdrawing a signature from each of the stacks and for transferring the two signatures to a conveyor means for opening the signatures, and means for placing both signatures simultaneously on to adjacent parts of the movable sewing saddle.
  • FIG. 1 is a partially sectioned side view of a book sewing machine formed as one embodiment of this invention. 7
  • FIG. 2 is a sectional view of the embodiment of FIG. 1, taken on the line 11-" of FIG. 1;
  • FIG. 3 is a longitudinal section showing the elements of the machine in a different operating position
  • FIG. 4 is a sectional view of the embodiment taken on the line IV-IV of FIG. 1;
  • FIG. 5 is a sectional view of the embodiment taken on the line V-V of FIG. 1;
  • FIG. 6 is a view of a part of the machine showing the sewer part, the movable saddle and the devices for placing the signatures in lateral adjustment, in a first operating position;
  • FIG. 7 is a view similar to FIG. 6 but showing the elements in a second operative position
  • FIG. 8 is a view, from the feeder end of the machine, of the movable saddle of the sewer and of the respective devices for positioning the signatures and holding them in place on the sewing saddle;
  • FIGS. 9 and 10 are sections taken on the line IX--IX and XX of FIG. 8, respectively;
  • FIG. 11 is a perspective view of a detail of the feeder of a second embodiment of this invention.
  • FIG. 12 is a diagrammatic side view of the feeder shown in FIG. 11;
  • FIG. 13 is a diagrammatic plan view of the machine as a whole, showing the path taken by the signatures from a pair of stacks at the feeder end to the output from the machine.
  • a sewing machine for books generally indicated 1, the fixed framework of which includes side walls 2 parallel to and separated from each other.
  • the walls 2 are connected by transverse elements 2a and carry beams 3 at the lower edges.
  • the beams 3 act as guides for the signature feeder generally indicated by the reference numeral 4.
  • the feeder 4 comprises a frame including two side walls 5 which are substantially coplanar with the walls 2 of the sewer 1 and connected together by transverse elements 6.
  • the walls 5 of the feeder 4 are mounted upon rollers 7 having horizontal axes, which roll over the upper faces of the beams 3,. and are also guided with respect to the beams 3 by rollers 8 having vertical axes, these also being carried by the walls 5.
  • the beams 3 extend well beyond the feeder 4 when this is in a first position adjacent the sewer l, in which position it is illustrated in FIGS. 1, 3 and 5. This is necessary to be able to move the feeder 4 away from the sewer l in order to gain access to those parts of the mechanism which are accessible only from the facing sides of these parts of the machine.
  • Movement of the feeder 4 can be effected by means of an electric motor 9 carried on a cross beam 10 which connects the longitudinal beams 3.
  • the motor 9 drives a screw 12 via a worm and wheel reduction gear.
  • the screw 12 is situated in the median longitudinal plane of the machine and is prevented from moving axially.
  • a nut 13 carried in the end of a sleeve 14 engages the screw 12, and serves as a guide for the end 12a of the screw 12; the other end of the tube 14 is secured to a cross beam 6' of the frame of the feeder 4.
  • the framework of the feeder carries two stacks 15 of signatures arranged in loaders between the two side walls 5, and adjacent the part which faces the sewing machine 1.
  • the loaders are arranged with their backs to the sewing machine and on opposite sides of and spaced from the longitudinal median plane in which lies the screw 12.
  • the backs of the lower signatures S1 rest upon transverse rods 16 and can be folded downwards by a pair of suckers 17 carried by a transverse drilled shaft 18 which makes reciprocating partial revolutions of about 90 of arc in such manner as to move the suckers between the two extreme positions shown respectively in FIGS. 1 and 3.
  • the purpose of this is to ensure that the signatures S1 may each be grasped by grippers 19 carried by an arm keyed to a shaft 20 parallel to the shaft 18, and associated with a cam 21 movement of which controls the closure and opening of the grippers 19.
  • the cam 21 is keyed to a transverse shaft 22, which makes reciprocal partial rotations between the extreme positions shown in FIGS. 1 and 3, in synchronism with the shafts 18 and 20. All the shafts 18, 20 and 22 are carried by the walls 5 of the feeder 4.
  • the grippers 19 transfer the signatures S1 from the stacks 15 onto a transporter generally indicated 23.
  • the transporter 23 comprises a plurality of endless chains 24 which are moved continuously in the direction shown by the arrow 25.
  • the chains have a plurality of small teeth 24a arranged in lines 26 transverse the chains.
  • the grippers 19 do not deposit the signatures S1 directly upon the upper part of the transporter 23, but insert them first into spring clips 29 mounted at the end of arms 30 which are carried by a transverse shaft 31 which performs reciprocating partial rotations synchronised with those of the shafts 20 and 22.
  • the spring clips 29 receive the signatures S1 which are drawn downwards by the grippers 19 which open as they deposit the signatures into the spring clips.
  • the shaft 31 then rotates and the arms 30 move to deposit the signatures Sl onto the transporter 23 so that they are picked up by the small teeth 24a of the chains 24 as they pass the clip 29.
  • the chains 24 are driven continuously by toothed wheels 27 and cause rotation of gearwheels 32 keyed to a shaft 33 mounted rotatably in brackets 34 projecting from the edges of the walls 5 towards the sewing machine 1.
  • a plurality of discs 35 which together form a transferring cylinder.
  • the transferring cylinder has a pair of grippers 36 and 37.
  • the grippers 36 serve to grasp the backs of the signatures and the grippers 37 grasp the leading edges of half S2 of the signatures S1 whilst these are leaving the upper part of the transporter 23, and moving substantially tangentially to the perimeter of the transferring cylinder.
  • leafmg devices 38 of a known type, each of which opens the signatures coming from one of the two stacks 15.
  • These leafing devices each comprise four suckers 39 carried by respective horizontal shafts 40 perpendicular to the walls 5.
  • the shafts 40 are driven with reciprocating partial rotations of about 90 and controlled by a programmer also of a type known in itself (not shown), which also controls the sucking action of the suckers 39 in dependence on the type of signatures which are to be dealt with.
  • a rod 41 carried by a shaft 42 parallel to the shafts 40.
  • the shaft 42 is also driven with recipro? cating partial rotations, and this operates to maintain temporarily raised the upper halves S3 of the signatures S1, to allow the grippers 37 of the transferring cylinder to grasp the leading edge of the lower halves S2 of the signatures S1.
  • the grippers 36 are so arranged as to grasp the backs to the signatures S1 as these leave the transporter 23.
  • the rotation of the transverse shafts which control the movable devices of the feeder is derived by known means (not shown) from a main driving shaft 43 which is driven from the sewing machine 1 (see FIG. 5) via toothed wheels 44, 45 and 46, and a telescopically extendable longitudinal shaft 47 parallel to the screw 12; all these are situated outside one of the side walls 5 of the feeder 4.
  • the sewing machine is controlled by a motor 48 which transmits rotation through a belt and pulley transmission 49 and toothed wheels 50, 51 and 52 are arranged adjacent the side wall of the sewing machine 1.
  • the ends of the transverse shaft 53 of the wheel 52 are mounted rotatably in the side walls 2 of the sewing machine and one end of the shaft 53 projects out through one of the walls 2 and carries a toothed control wheel 54 which engages with a cooperating toothed wheel 55 which transmits rotation through a bevel gear 56, to the above mentioned telescopic shaft 47.
  • the shaft 47 extends during withdrawal of the feeder 4 from the sewing machine 1 as illustrated by the line of dashes in FIG. 5.
  • the sewing machine 1 includes the so-called movable saddle 57 carried by two equal balancer arms 58 which are parallel to the walls 2 and mounted rotatably on a transverse shaft 59 which is pivoted in supports provided in the walls 2 and integral with the toothed wheel 51.
  • the arms 58 are formed as double lever rocker arms and carry rollers (not shown) in pivots 60 (see FIG. 3) at the ends of the arms opposite those which carry the movable saddle 57.
  • the rollers engage in cam channels 61 formed in opposed lateral faces of two discs 62 arranged between the arms 58 and the adjacent walls 2 of the sewing machine frame.
  • the discs 62 are keyed to the shaft 53.
  • the cam channel 61 and the arms 58 are so shaped that the saddle 57 moves periodically between a sewing position (see FIG. 3) in which the top of the saddle is adjacent known sewing elements 63 which cooperate in a known manner with other sewing devices (not shown) carried by the movable saddle 57, and a loading position (see FIG. I) in which the top of the saddle S7 lies substantially in a vertical plane which is tangential to the discs 35 of the transferring cylinder of the feeder 4.
  • the shape of the cam channel 61 is, moreover, such that the saddle remains for a short time in each of the abovementioned positions so as to receive the signatures and to sew them to the books being made.
  • the grippers 36, 37 of the transferring cylinder open to release the signatures held there-by when the backs of the signatures lie substantially in the vertical plane which is tangential to the discs 35 of the transfer cylinder.
  • the machine is also provided with means for ensuring that the signatures are correctly positioned and adequately set in place on the movable saddle 57 when this is stopped adjacent the sewing elements 63 of the sewing machine 1.
  • This comprises a bar 64 parallel to the shaft 59 movable along guides in that face of the saddle adjacent the sewing machine, upon which the upper halves S3 of the signatures S1 are positioned.
  • the bar 64 is housed in such a way that it does not project from this face of the saddle and carries two devices 65 spaced from one another by a distance equal to that which must separate during sewing the facing transverse edges of the two signatures which are simultaneously fed onto the saddle.
  • One end of the bar 64 projects beyond the saddle 57 and is pivoted to a balancer lever 66 the pivot point of which is mounted to a pivot 67 carried by the saddle.
  • the other end of the lever 66 carries a roller 68 which engages a face cam 69 in a disc 70 mounted for rotation with the shaft 59.
  • the arrangement is such that the bar 64 occupies a position with respect to the saddle 57, when the latter is ready to receive the signatures (see FIGS. 1 and 6) in which the devices 65 are displaced with respect to the position which they must occupy in order to ensure correct lateral adjustment of the signatures.
  • the rotation of the shaft 59 during the period when the saddle dwells in the sewing position causes movement of the bar 64 and thus of the devices 65 (see FIG. 7) towards the arm 58 opposite to that adjacent which lies the disc 70, and thus causes the necessary lateral adjustment of the signatures for sewing.
  • the saddle 57 is also provided with an arrangement for ensuring proper contact of the backs of the signatures to the opposite faces of the saddle 57.
  • This arrangement which comes into action during the movement of the saddle towards the sewing devices 63, comprise (see FIGS. 8 and a'shaft 71 parallel to the bar 64 and mounted rotatably in bearings 72 carried by a plate 73 which is covered by the upper half S2 of a signature Sl on the saddle, and mounted movably on the arms 58.
  • the other end of the draw-rod 79 is pivoted to one arm 80 of a crank lever mounted upon a pivot 81 which is carried by one of the arms 58 supporting the saddle, and which is parallel to the shaft 59.
  • the other arm 82 of the crank lever carries a roller 83 which is in contact with a cam 84 keyed to the shaft 59.
  • a spring (not shown) ensures constant contact between the roller 83 and the periphery of the cam 84.
  • the shaft 71 carries a plurality of strips 85 connected at one end to the end of a limb of an associated V spring 86 the apex of which faces the plate 73.
  • the shaft 71 can be caused to rotate by means of a mechanism similar to that associated with the shaft 77 and comprising an arm 87, a draw-rod 88 and a crank lever 89 controlled by a cam90 also keyed to the shaft 59.
  • the arrangement of the parts is such that after the signatures have been laterally adjusted to strips 85 and their associated springs 86 press the lower halves S2 of the signatures S1 against the plate 73 of the movable saddle 57 and move them downwards on to the saddle as illustrated in broken outline in FIG. 10.
  • the feeder 4 is provided with an arrangement for applying strips of paste C in short sections to the external faces of the upper halves S3 of the signatures S1 adjacent the backs D thereof.
  • a container 91 adjacent the top of the transferring cylinder constituted by the discs 35 there is arranged a container 91 parallel to the shaft 33.
  • the container 91 carries paste and is equipped with heating means (not shown).
  • a roller 92 keyed to a shaft 93 and maintained in rotation by a transmission comprising a chain and sprockets 94 turned by the shaft 33.
  • the shaft 33 also drives a gear pinion 95 which engages a gear pinion 96 mounted on a shaft 97 which is rotatable in openings in the walls 5.
  • Adjacent each end of the shaft 97 are keyed two sprockets 98 which carry respective chains 99 which pass over sprockets 100 keyed to a shaft 101 parallel to the shaft 97 and also placed above the transfer cylinder formed by the discs 35.
  • the chains 99 carry a pair of bars 102 parallel to the shafts 97 and 101, and provided with spatulas 103 which, during the continuous circulation of the bars 102 in the direction of the arrow 104, engage against the periphery of the roller 92 and also against the signa tures.
  • the spatulas 103 thus pick up paste from the roller 92 and deposit it in the form of streaks close to the backs of the signatures S1 as they pass over the transfer cylinder.
  • FIG. 13 is a schematic diagram showing that the machine is capable of sewing two books at a time.
  • FlG. l3 signatures in the position which they adopt whilst they are open are indicated 105, and signatures in the positions in which they are sewn to the books being formed are indicated 106.
  • Books emerging from the sewing machine are indicated 107 and 108.
  • a sewing machine part for sewing signatures to form a book
  • said sewing machine part including: sewing devices
  • a feeder part including means for holding a stack of signatures to be sewn into books
  • said means for moving said sewing saddle operates to move said saddle in a direction transverse the ridge thereof onto which engages the central backbone fold of said signatures
  • said opening means operates on said signatures as they are moved along by said conveyor
  • said conveyor means operates to transfer said sewing saddle
  • said feeder part carries a motor having an associated transmission means connected to said sewing machine part to control said movement of said feeder part toward or away from said sewing machine part in dependence on opening means for simultaneously opening both said signatures, and means for simultaneously placing said two opened signatures astride adjacent parts of said sewing saddle.
  • adhesive applying means operating to apply an adhesive to one of the outer faces of said signature adjacent the backbone fold thereof, prior to placing said signatures onto said sewing saddle.
  • said holding means operating after said adjustment means having adjusted the position of said two signatures on said sewing saddle to hold said signatures in position as said sewing saddle moves to said first position at which said signatures are sewn.
  • Patent No. 419 I Dated Lorenzo DEPETRIS Inventor (s) It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Collation Of Sheets And Webs (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
US00378864A 1972-07-18 1973-07-13 Automatic machine for feeding and sewing signatures in books Expired - Lifetime US3797419A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT69329/72A IT964713B (it) 1972-07-18 1972-07-18 Perfezionamenti nelle macchine cucitrici automatiche a filo di refe

Publications (1)

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US3797419A true US3797419A (en) 1974-03-19

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US00378864A Expired - Lifetime US3797419A (en) 1972-07-18 1973-07-13 Automatic machine for feeding and sewing signatures in books

Country Status (9)

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US (1) US3797419A (de)
JP (1) JPS5222565B2 (de)
BR (1) BR7305370D0 (de)
CA (1) CA984682A (de)
CH (1) CH563885A5 (de)
DD (1) DD107408A5 (de)
DE (1) DE2335358C3 (de)
GB (1) GB1425974A (de)
IT (1) IT964713B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4704973A (en) * 1985-07-15 1987-11-10 Kolbus Gmbh & Co. Kg Bookbinding method and apparatus
US6554267B2 (en) * 2001-03-30 2003-04-29 Hewlett-Packard Company Stapling apparatus for a booklet maker
US6578838B2 (en) * 2001-03-30 2003-06-17 Hewlett-Packard Development Company, L.P. Sheet collecting apparatus with integrated staple mechanism
US20040217535A1 (en) * 2003-04-30 2004-11-04 Villanueva Jose Alvaro Barba Method and apparatus for making booklets
EP1557284A1 (de) * 2004-01-22 2005-07-27 MECCANOTECNICA S.p.A. Nähstation mit zurückziehbaren Nadeln für eine Buchbindemachine
ITMI20100114A1 (it) * 2010-01-28 2011-07-29 Meccanotecnica Spa Stazione di cucitura con blocco della segnatura sulla sella mobile tramite perforatori

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD217179A1 (de) * 1983-06-23 1985-01-09 Polygraph Leipzig Anordnung von buchbindereimaschinen und -bausteinen zur verarbeitung von fadenzusiegelnden falzbogen
US4555101A (en) * 1984-03-13 1985-11-26 Stobb, Inc. Method and apparatus for separating signatures from a stack
DE3908347A1 (de) * 1989-03-15 1990-09-27 Roland Man Druckmasch Vorrichtung zur uebernahme, speicherung und abgabe von falzprodukten
JP5674085B2 (ja) 2008-11-10 2015-02-25 ミュラー・マルティニ・ホルディング・アクチエンゲゼルシヤフト 折畳まれた印刷製品の糸綴じ装置
IT1402555B1 (it) * 2010-11-05 2013-09-13 Meccanotecnica Spa Macchina da legatoria con sella mobile di trasporto e di cucitura
EP2657163B2 (de) 2012-04-24 2023-03-29 Müller Martini Holding AG Verfahren zum Betrieb einer Fadenheftmaschine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3024746A (en) * 1958-04-01 1962-03-13 Brock And Rankin Book sewing machine
US3492955A (en) * 1967-05-26 1970-02-03 Joseph T Gallagher Automatic control system for book sewing machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE589476C (de) * 1931-02-08 1933-12-13 Brehmer Geb Bogenzufuehrung bei Buchheftmaschinen
US2017512A (en) * 1932-02-23 1935-10-15 Reiser Daniel Gathering and stitching machine
DE1436073C3 (de) * 1965-09-29 1974-04-04 Harris-Intertype Corp., Cleveland, Ohio (V.St.A.) Übertragungsvorrichtung für gefalzte Bögen
CH498729A (it) * 1969-05-26 1970-11-15 Dolfini Leonardo Procedimento ed apparecchiatura per aprire ad alta velocità le segnature da alimentare a macchine da legatoria
DE1950187A1 (de) * 1969-10-04 1971-04-22 Rahdener Maschf August Falzbogenanleger

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3024746A (en) * 1958-04-01 1962-03-13 Brock And Rankin Book sewing machine
US3492955A (en) * 1967-05-26 1970-02-03 Joseph T Gallagher Automatic control system for book sewing machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4704973A (en) * 1985-07-15 1987-11-10 Kolbus Gmbh & Co. Kg Bookbinding method and apparatus
US6554267B2 (en) * 2001-03-30 2003-04-29 Hewlett-Packard Company Stapling apparatus for a booklet maker
US6578838B2 (en) * 2001-03-30 2003-06-17 Hewlett-Packard Development Company, L.P. Sheet collecting apparatus with integrated staple mechanism
US20040217535A1 (en) * 2003-04-30 2004-11-04 Villanueva Jose Alvaro Barba Method and apparatus for making booklets
US6827346B2 (en) * 2003-04-30 2004-12-07 Hewlett-Packard Development Company, L.P. Method and apparatus for making booklets
EP1557284A1 (de) * 2004-01-22 2005-07-27 MECCANOTECNICA S.p.A. Nähstation mit zurückziehbaren Nadeln für eine Buchbindemachine
ITMI20100114A1 (it) * 2010-01-28 2011-07-29 Meccanotecnica Spa Stazione di cucitura con blocco della segnatura sulla sella mobile tramite perforatori

Also Published As

Publication number Publication date
GB1425974A (en) 1976-02-25
DD107408A5 (de) 1974-08-05
BR7305370D0 (pt) 1974-09-05
IT964713B (it) 1974-01-31
JPS5222565B2 (de) 1977-06-18
DE2335358C3 (de) 1981-10-29
CA984682A (en) 1976-03-02
DE2335358A1 (de) 1974-01-31
JPS49125121A (de) 1974-11-29
CH563885A5 (de) 1975-07-15
DE2335358B2 (de) 1981-03-12

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