EP1013813A1 - Verfahren zum Säumen von Textilwaren oder dergleichen und Vorrichtungen zum Herstellung - Google Patents

Verfahren zum Säumen von Textilwaren oder dergleichen und Vorrichtungen zum Herstellung Download PDF

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Publication number
EP1013813A1
EP1013813A1 EP99830794A EP99830794A EP1013813A1 EP 1013813 A1 EP1013813 A1 EP 1013813A1 EP 99830794 A EP99830794 A EP 99830794A EP 99830794 A EP99830794 A EP 99830794A EP 1013813 A1 EP1013813 A1 EP 1013813A1
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EP
European Patent Office
Prior art keywords
patch
sewing machines
sewing
seams
pair
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.)
Granted
Application number
EP99830794A
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English (en)
French (fr)
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EP1013813B1 (de
Inventor
Gabriele Barioni
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.)
Magetron Srl
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Magetron Srl
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Publication date
Application filed by Magetron Srl filed Critical Magetron Srl
Publication of EP1013813A1 publication Critical patent/EP1013813A1/de
Application granted granted Critical
Publication of EP1013813B1 publication Critical patent/EP1013813B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B25/00—Sewing units consisting of combinations of several sewing machines
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B33/00—Devices incorporated in sewing machines for supplying or removing the work
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B35/00—Work-feeding or -handling elements not otherwise provided for
    • D05B35/02—Work-feeding or -handling elements not otherwise provided for for facilitating seaming; Hem-turning elements; Hemmers

Definitions

  • the present invention relates in general to methods for manufacturing hems in patches of fabric or the like, and in particular for manufacturing seams of lateral hems in napkins or the like.
  • the present methods being preferably usable in apparatuses for manufacturing said hemmed items, in particular napkins or the like, which also constitute the subject of the present invention.
  • apparatuses or plants for the automatic manufacture of said napkins provide, for the manufacture of said hem, for folding the lateral edges of the individual bi-dimensional patch to bring them in contact and fasten them, by sewing, to the central portion of the napkin.
  • a further type of seam used for the execution of said hems of napkins and the like is the so-called "knotted stitch” seam, which is used in relation to sewing machines commanded manually by the personnel according to a wholly traditional operating mode, preceding the advent of the aforesaid automatic machines.
  • such a destruction of the hem generally does not take place in case of seams executed with "knotted stitch", wherein even the breakage of the seam itself, resulting from wear and repeated washings, in correspondence with some stitches, does not also cause the further unravelling of the whole seam and the destruction of the whole hem, as occurs for the chained stitch seam.
  • An aim of the present invention therefore is to obtain in a convenient manner hemmed items having hems that are particularly resistant to wear and disassembly.
  • a method for manufacturing hems in patches of fabric or the like, in particular for providing lateral hems in napkins, the method providing, after at least a first and a second opposite lateral edges of each patch have been folded back to bring them in contact with the central portion of the patch itself, for said patches to be advanced longitudinally at a pre-set velocity and for said first and second edge to be fastened by sewing in a condition folded back onto the central portion of the patch.
  • the present method provides for using, for the lateral sewing of said first and second lateral edges of the patch, at least a first pair of sewing machines and a second pair of sewing machines longitudinally distanced from the first pair of sewing machines, wherein said first and second pair of sewing machines are such as to provide knotted stitch seams and are activated in mutually alternative fashion, to provide said lateral seams on respective patches.
  • a method for manufacturing hems in patches of fabric or the like, in particular for providing lateral hems in napkins, wherein at least a first pair of sewing machines is used for the lateral sewing of said first and second lateral edges of the patch, and a second pair of machines is used, longitudinally distanced from the first pair of sewing machines, wherein said first pair of sewing machines is such as to sew a chained stitch and the second pair of sewing machines is such as to provide seams with knotted stitches able to define fastening seams in correspondence with the extremities of said lateral seams.
  • a first preferred embodiment 1 of apparatus or plant for manufacturing bi-dimensional items 11 made of fabric or the like, in particular for manufacturing napkins, starting from corresponding patches 10, is shown in Figure 1A.
  • the present first embodiment 1 of apparatus is suitable for the manufacture of napkins 11, or of other bi-dimensional items, of the kind exemplified in the subsequent Figure 1B, in which a first and a second opposite lateral edges 12, 14 of a patch are folded back onto the central portion 16 of the patch itself and are fastened thereto by means of lateral seams 17.
  • the napkins are completed with hems perpendicular to the aforementioned lateral hems obtained by means of said seams 17.
  • said seams 17 are made with knotted stitch and it is also possible for them to be provided in correspondence with the extremities of said lateral seams 17, of the fastening or stamping seams 19, also executed with knotted stitch, as shall be better described hereafter.
  • the present first preferred embodiment 1 of the apparatus comprises, in a substantially known manner, a section for feeding a ribbon or band of fabric 3 towards the main part, with longitudinal extension, of the apparatus, which main part presents a section 4 that receives said ribbon and cuts it into patches 10, which are sent along the apparatus through suitable longitudinal advance means comprising, in the example shown, a conveyor belt 5 which advances said patches 10 in a longitudinal direction at a pre-set velocity V1.
  • suitable longitudinal advance means comprising, in the example shown, a conveyor belt 5 which advances said patches 10 in a longitudinal direction at a pre-set velocity V1.
  • the fabric ribbon or band 3 is expressly shown in this Figure 1A to be provided with pre-constituted longitudinal hems, which are indicated by way of example with the reference number 13' in Figure 1A and which will constitute a pair of opposite lateral hems 13' of the napkin.
  • the present first preferred embodiment 1 of apparatus comprises, as schematically shown in Figure 1A, appropriate means 6 able to fold back a first and a second opposite lateral edges 12, 14 of each patch 10 in longitudinal advancement to bring them in contact with the central segment 16 of the patch itself.
  • Said lateral fold back means can be of any kind known to the person versed in the art and are not therefore described in detail herein.
  • a first pair of sewing machines 18 and a second pair of sewing machines 20 are provided which, as shown, are positioned longitudinally distanced from the first sewing machines 18.
  • Said first and second pairs of sewing machines 18 and 20 are thus such as to provide knotted stitch seams and, with appropriate suitable means (not shown in the figures), are activated, in mutually alternative fashion, to provide said lateral hem seams 17 onto respective patches 10.
  • appropriate suitable means not shown in the figures
  • the present first embodiment it is therefore possible to execute in automated fashion the aforesaid lateral hems of the napkin using a knotted stitch sewing machine.
  • the finished products are extracted from the apparatus with the aid of a transverse conveyor belt 7.
  • said first and second pair 18 and 20 of sewing machines are mounted on corresponding carriages 22 and 24 movable longitudinally to provide, in correspondence with the extremities of said lateral seams 17, fastening or stamping seams 19 which allow to fasten in a particularly secure manner the extremities of the lateral seams themselves, which constitute the most delicate portion of the edge seam, and whose safeguard guarantees the good durability of the edges of the aforementioned napkins.
  • Figures 2A, 3A, 4A, 5A, 6A and 7A show a preferred embodiment of said means for longitudinally actuating the cursor 24 for the pair of sewing machines 20 supported thereby. Similar means are obviously provided for actuating also the cursor 22 for the pair of machines 18.
  • said conveyor belt 5 for the longitudinal advance of the patches 10 of the apparatus makes uses, in order to keep said patches 10 in contact with the upper surface of the belt itself along the route, a plurality of upper pressure rollers 8 longitudinally distributed along the route itself.
  • Said driving belt 26 is selectively coupled and uncoupled with driving means of the cursor 24, whereto said cursor is connected in integral fashion, which means 30 are in the form of a respective belt closed in a loop 32 tensioned on respective pulleys 34.
  • Said belts 26 and 30 and the related support and rotation pulleys extend as shown in a plane underlying the plane defined by the belt 5 for the advancement of the patches 10.
  • the rotatory actuation of said belt 26 is derived from the same motor M which actuates the belt 5 for the advancement of the patches.
  • latching and unlatching means comprise a first and a second fastening portion 38, 40, which are integrally connected in longitudinal direction to the corresponding cursor 24 and between which extends said driving belt 30 and slides said belt 26 able permanently to move at velocity V1.
  • Said first and second portion 38, 40 are actuated, by suitable preferably pneumatic actuator means which are not expressly shown in the figures, in a first operative condition of mutual approach, which provides for the fastening of said driving means 30 and of said means 26 able continuously to move at velocity V1 and provides for the mutual coupling of the driving means 30 and means 26 able continuously to move at velocity V1, and a second condition of mutual detachment, such as to provide for the mutual release of said driving means 30 and of said means 26 able to move at velocity V 1.
  • Said means for the longitudinal actuation of the cursor 24 are completed by appropriate means for braking the same movable cursor 24, which are able to be activated to brake when said driving means 30 and said means 26 movable at speed V1 are in unlatched condition and are able to be de-activated from the braking condition when said driving means 30 and said means 26 movable at velocity V1 are in the latched condition.
  • the aforementioned braking means comprise a first and a second portions 42, 44 integral with the corresponding cursor 24 and an elongated element 46 fixed to the frame of the apparatus positioned between said first and second braking portions 42, 44.
  • Suitable actuator means preferably pneumatic, which are not expressly shown in the figures, are provided for activating said first and second braking portions 42, 44 to secure said elongated element 46 fixed to the frame of the apparatus, to block the longitudinal displacement of the corresponding cursor 24, and in mutual detachment to release said fixed elongated element 46 to allow the longitudinal motion of the corresponding cursor 24.
  • a linear actuator 48 comprising a pneumatic cylinder 50, fixed with an extremity to the frame of the apparatus, wherefrom extends a movable stem 52 which presents its front extremity that is fixed, in 53, to said cursor 24 and which extends longitudinally and parallel to a level underlying said plane of advance 5 for said patches 10.
  • said portions 38, 40 for the latching and unlatching of the cursor 24, said braking portions 42, 44 and the attachment point 53 for the pneumatic return cylinder 48 are positioned on a portion 24' which is connected to said cursor 24 by means of a second pneumatic cylinder or linear actuator 55 that allows an additional forward and backward longitudinal motion of the cursor 24 relative to said block 24' and that allows, among other things, to obtain, when it moves the cursor 24 forward, a velocity V2 of advance of the cursor 24 exceeding the velocity V1 of advance of the patch 10 undergoing work.
  • Said actuator 55 for advancing the cursor at a greater speed comprises a cylinder 59 which is integral with said cursor 24 and a stem 57 movable in the axial direction, which extends horizontally and which is integral with said block 24'.
  • This configuration allows, as shall become more readily apparent hereafter, when it is necessary to bring the sewing machine forward relative to the patch 10 being advanced, to obtain an advancement of the cursor 24, and of the sewing machines supported thereby, at a velocity V2 exceeding the velocity of advance V1 of the patch along the line 5, as well as to provide a pre-determined return, depending on the current operative condition, by said cursor 24.
  • FIG. 2A shows an operative condition in which the patch 10 has already been subjected to the folding of the lateral edges and is reaching the corresponding pair of machines 20 in view of the lateral sewing of said folded-back edges.
  • the sewing machines 20 are operatively deactivated and the means for coupling the cursor with the driving means are inactive and the brake of the cursor is activated.
  • FIG. 3A refers to a phase of the work operations performed on the patch 10 which is subsequent to the realisation, on the same patch 10, of the aforementioned fastening or stamping seams 19, in correspondence with the front edge of the patch, and of the lateral seams 17 of the folded edges of the patch itself.
  • Said realisations of the front stamping seams 19 and of the lateral seams 17 for retaining the folded edges of the patch shall be described better hereafter with reference to the subsequent figures.
  • FIG. 3A shows, after providing the patch with said stampings and lateral seams for the folded edges of the patch, the sewing machines 20 and the cursor 24 that supports them are stopped in a first initial or rear reference position, which is indicated with the reference P0 in Figure 3A.
  • said means for longitudinally activating said cursor 24 for supporting the sewing machines 20 are such that, in order to provide in said patch 10 said blocking seams 19 in correspondence with the rear advancement edge of the patch 10, said cursor 24 and the corresponding sewing machines 20, when said advancing patch 10 arrives with its rear edge substantially in correspondence with the sewing needle A of the same apparatus, are made to move in the direction of advance of the patch 10 at a velocity V2 exceeding the velocity V1 of advance of the patch 10 to provide a fourth seam segment of a pre-determined length L4 (shown in the subsequent Figure 4B).
  • the braking portions 42, 44 are mutually detached and the braking action is de-activated, whilst the engagement portions 38, 40 are approached to retain between them said belt able permanently to move at velocity V1 and the driving belt 30 providing for said driving of the cursor 24 at velocity V1.
  • said second linear actuator 55 is activated, which moves the cursor 24 forward with respect to the block 24', and brings said braking means and the latching and unlatching means, allowing the cursor 24 itself to attain a velocity V2 exceeding the velocity V1 of advance of the patch.
  • said cylinder 55 is activated, which cylinder moves the cursor 24 forward relative to the block 24', which bears said braking means and latching and unlatching means, allowing the cursor 24 itself to attain a velocity V2 exceeding the velocity V1 of advance of the patch.
  • this advancement at velocity V2 brings the cursor 24 in a second advanced position P2, downstream of the first advanced position P1, where the cursor 24 is stopped and starts to move back towards the first rear reference position P0 (shown in Figure 3A).
  • This return being obtained by activating backwards said first linear return actuator 48 and the second intermediate linear actuator 55.
  • the machines supported by the cursor 24 are maintained in sewing operation to provide the seam segment that corresponds to the lateral seams 17 and that, in Figure 3B, is indicated with the reference L3.
  • the braking portions 42, 44 are removed and the braking action is thus deactivated; moreover, said engagement portions 38, 40 are also removed and the driving action is interrupted.
  • the subsequent Figure 8A shows a second preferred embodiment 101 of apparatus or plant for manufacturing bi-dimensional items made of fabric or the like, in particular for manufacturing napkins, starting from corresponding patches 10.
  • the present second embodiment 101 of apparatus is suitable for manufacturing napkins 111 or other similar bi-dimensional items, of the type exemplified in the subsequent Figure 8B, i.e. of the type in which a first and a second opposite lateral edge 112, 114 of a patch are folded back onto the central portion 116 of the patch itself and fastened thereto by means of lateral seams 117.
  • the napkins are, optionally, also completed with perpendicular hems to the aforementioned lateral hems obtained by means of said seams 117.
  • a first mode (as shown in Figure 8B) it is possible to fold back and fasten, by respective transverse seams 115, also the lateral edges 113 of the patch, or, otherwise, said transverse hems could be obtained in another way (as shown in Figure 8A), without folding back the corresponding transverse edges of the patch, providing pre-constituted hems 113' obtained in any suitable manner known to the person versed in the art.
  • said seams 117 are made with chained stitch and blocking or stamping seams 119, executed with knotted stitch, are also provided in correspondence with the extremities of said lateral seams 117.
  • the present second preferred embodiment of the apparatus or plant comprises a series of components similar to those of the first preferred embodiment. Said similar components maintain, in Figure 8A, the same numeric reference that has been used in relation to the first embodiment and, in order not to overburden the present description, are not described in detail again.
  • This second preferred embodiment 101 differs from the first one in that it presents, downstream of said lateral folding-back means 6, a first pair of sewing machines 118 able to sew with chained stitch and fixed to the frame of the apparatus and a second pair of sewing machines 120, which are positioned longitudinally distanced from the first pair 118 of sewing machines and which are such as to provide knotted stitch seams to form only the extreme stamping seams 119.
  • each patch 10 the lateral seam is provided with chained stitch by means of the machines 118, whereupon said patch 10 is advanced by the belt 5 to the pair of sewing machines 120 which provide the stamping 119 with knotted stitch seam.
  • the pair of sewing machines 120 is mounted on a respective cursor 124 wholly similar to the cursor 24 of the first preferred embodiment, which is therefore not described in detail again.
  • the present second embodiment of apparatus presents some aspects of operation which are substantially similar to those provided by the first preferred embodiment.
  • the various phases of execution of said lateral seams are summarised in Figures 3C, 4C, 5C, 6C, 7C which expressly refer to the stamping phases executed by the machines 120 borne by the respective cursor 124.
  • the execution of the stampings therefore takes place in a manner substantially similar to the one provided for the first embodiment.
  • the stamping method is, as was done for the first embodiment and for a better comprehension thereof, described starting from a condition wherein, in addition to the aforementioned lateral seam L0, a seam segment L3" has already been provided in correspondence with the rear edge of the patch and the entire stamping in correspondence with the front edge of the patch 10 itself (as shown in Figure 3C).
  • the rear stamping thus provides for the machines 120, starting from the first rear position P0, are advanced at velocity V2 exceeding the velocity V1 of advance of the patch to provide the segment L4', as shown in Figure 4C, and then stopped in advanced position P1, with the belt 5 that advances, and maintained in sewing operation to provide the final segment L5' shown in Figure 5C.
  • the machines 120 With the cursor 24 stopped in this position P0', the machines 120, once the front edge of the subsequent patch meets the sewing needle A, start sewing providing a segment L1' (as Figure 6C shows), followed by a segment L2' (as Figure 7C shows), which is obtained with the machines 120 that are accelerated forward at a pre-set velocity V2 exceeding the velocity V1 of advance of the belt 5 for the longitudinal conveyance of the patches 10 arriving in the second advanced position P2 longitudinally downstream from the first position P1.
  • a seam segment L3' is provided in correspondence with the front edge of the patch 10, to interrupt the sewing of these machines 120 for a certain longitudinal segment, during which the cursor 120 is returned to the initial position P0 whilst the belt 5 continues to make said patches 10 advance, and to resume sewing, in the vicinity of the rear edge of the patch, to provide a seam segment L3" (as Figure 3C shows).
  • the stamping seams can be effected exploiting the known motion, clockwise and counterclockwise, of the traditional organ for driving the fabric situated in a position below said fabric being sown, which, in a wholly known manner, is able to move to drive the fabric forward and, respectively, backward, thanks to the execution of a closed trajectory, which presents an active upper branch able to contact and drive the patch 10 respectively forward and backward, depending on whether a forward seam or a rearward seam is to be executed on the fabric itself.
  • the cursor 24 itself is coupled to means able to move at a velocity V1 equal to the velocity of advance of the patch 10, in a manner wholly similar to the one described for the first embodiment and hence not described in detail again.
  • the movable cursor 24 that bears the machine has moved from the position P0 to an advanced position P1, in the space that lies between the patch and the subsequent one the cursor 24 is brought back to a rear position which can be the position P0 again or, if space is insufficient to complete this return, in an intermediate position P0' between the position P0 and the advanced position P1.
  • the movable cursor bearing the machine has moved from the position P0, or P0', to a second advanced position P2 which may coincide with the position P1, if the starting position had been the position P0, or a little farther forward, if the starting position had been the position P0'.
  • the sewing machine - with the patch that continues to advance at velocity V1 - effecting the seam along the lateral edge of the patch the sole return linear actuator, corresponding to the cylinder 46 of the first embodiment, is activated, thereby returning the cursor to the starting position P0, exploiting the space constituted by the length of the patch.
  • All embodiments preferably provide for the use of centralised means for processing and controlling the various parts of the present apparatus that act starting from signals coming from preferably optical sensors appropriately positioned on said apparatus.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Details Of Garments (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
EP99830794A 1998-12-23 1999-12-22 Verfahren zum Säumen von Textilwaren oder dergleichen und Vorrichtungen zum Herstellung Expired - Lifetime EP1013813B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO980713 1998-12-23
IT1998BO000713A IT1304446B1 (it) 1998-12-23 1998-12-23 Procedimenti per la realizzazione di cuciture di orli in pezze ditessuto o simile e apparecchiature per la realizzazione di detti

Publications (2)

Publication Number Publication Date
EP1013813A1 true EP1013813A1 (de) 2000-06-28
EP1013813B1 EP1013813B1 (de) 2003-04-23

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EP99830794A Expired - Lifetime EP1013813B1 (de) 1998-12-23 1999-12-22 Verfahren zum Säumen von Textilwaren oder dergleichen und Vorrichtungen zum Herstellung

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EP (1) EP1013813B1 (de)
AT (1) ATE238440T1 (de)
DE (1) DE69907124T2 (de)
IT (1) IT1304446B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004066767A2 (en) * 2003-01-21 2004-08-12 Kimberly-Clark Worldwide, Inc. Apparatus, seaming assembly and method for placing seams in a continuously moving web
ITTO20090799A1 (it) * 2009-10-21 2010-01-20 P A M I Produzione Automazione Mac Chine Ind Dispositivo perfezionato di trascinamento di pezze di tessuto applicato ad una macchina da cucire
CN113463282A (zh) * 2021-01-25 2021-10-01 浙江交通职业技术学院 条形绷带自动包缝机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2667132A (en) * 1949-12-27 1954-01-26 Milhiser Bag Company Inc Bagmaking method and apparatus
US2834307A (en) * 1953-06-30 1958-05-13 Gordon A Jones Machine for providing divided flexible structures
US3232256A (en) * 1963-03-15 1966-02-01 Master Sew Coutrol Corp Fabric positioning and sewing apparatus
US3955515A (en) * 1974-10-07 1976-05-11 Nemo Industries, Inc. Folding and hemming method and apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2667132A (en) * 1949-12-27 1954-01-26 Milhiser Bag Company Inc Bagmaking method and apparatus
US2834307A (en) * 1953-06-30 1958-05-13 Gordon A Jones Machine for providing divided flexible structures
US3232256A (en) * 1963-03-15 1966-02-01 Master Sew Coutrol Corp Fabric positioning and sewing apparatus
US3955515A (en) * 1974-10-07 1976-05-11 Nemo Industries, Inc. Folding and hemming method and apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004066767A2 (en) * 2003-01-21 2004-08-12 Kimberly-Clark Worldwide, Inc. Apparatus, seaming assembly and method for placing seams in a continuously moving web
WO2004066767A3 (en) * 2003-01-21 2004-10-14 Kimberly Clark Co Apparatus, seaming assembly and method for placing seams in a continuously moving web
US6945185B2 (en) 2003-01-21 2005-09-20 Kimberly-Clark Worldwide, Inc. Apparatus, seaming assembly and method for placing seams in a continuously moving web
US7520230B2 (en) 2003-01-21 2009-04-21 Kimberly-Clark Worldwide, Inc. Apparatus, seaming assembly and method for placing seams in a continuously moving web
ITTO20090799A1 (it) * 2009-10-21 2010-01-20 P A M I Produzione Automazione Mac Chine Ind Dispositivo perfezionato di trascinamento di pezze di tessuto applicato ad una macchina da cucire
CN113463282A (zh) * 2021-01-25 2021-10-01 浙江交通职业技术学院 条形绷带自动包缝机

Also Published As

Publication number Publication date
ATE238440T1 (de) 2003-05-15
EP1013813B1 (de) 2003-04-23
DE69907124T2 (de) 2004-02-19
ITBO980713A1 (it) 2000-06-23
DE69907124D1 (de) 2003-05-28
ITBO980713A0 (it) 1998-12-23
IT1304446B1 (it) 2001-03-19

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