US3903818A - Apparatus for the making of straight seams, for example false creases in trousers - Google Patents

Apparatus for the making of straight seams, for example false creases in trousers Download PDF

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Publication number
US3903818A
US3903818A US459053A US45905374A US3903818A US 3903818 A US3903818 A US 3903818A US 459053 A US459053 A US 459053A US 45905374 A US45905374 A US 45905374A US 3903818 A US3903818 A US 3903818A
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US
United States
Prior art keywords
workpiece
sewing machine
sewing
retaining means
rectilinear guide
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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
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US459053A
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English (en)
Inventor
Nerino Marforio
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.)
Virginio Rimoldi and Co SpA
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Virginio Rimoldi and Co SpA
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Publication date
Application filed by Virginio Rimoldi and Co SpA filed Critical Virginio Rimoldi and Co SpA
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Publication of US3903818A publication Critical patent/US3903818A/en
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Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B35/00—Work-feeding or -handling elements not otherwise provided for
    • D05B35/10—Edge guides
    • D05B35/105—Guiding while stretching the workpiece, e.g. by means of weighted clips
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread

Definitions

  • ABSTRACT May 22, 1973 Italy 24369/73
  • the present invention refers to an apparatus for the making of straight seams, for example false creases in trousers comprising a sewing machine with sewing means and workpiece feeding means; comprising in addition rectilinear guide means acting together with retaining means for keeping the wotkpiece aligned with the said sewing means when approaching them.
  • the said piece holder clamps have a principal drawback in that they do not allow sewing far from the edges of the workpiece, in addition, they have to be of a rather large size when sewing, for example, trousers.
  • the use of the said clamps causes a certain loss of time because of the necessity of having to return the said clamps to the starting point each time an operation cycle has been completed.
  • the principal drawback is due to the absence of any clamping elements keeping the workpiece well aligned with the sewing means of the machine during the entire sewing operation, so that the workpiece, when approaching the sewing point is subjected to partial rotations on the sewing surface removing it from the required rectilinear path and out of the correct alignment.
  • the technical problem to be solved is the realization of an apparatus for making straight seams, for example, the false creases of trousers, which ensures that the part of the workpiece not engaged by the sewing means remains constantly and perfeclty aligned with the said sewing means during its approach to the sewing station.
  • the apparatus designed in this manner simplifies pre liminary operations, for example, those appurtenant to charging the single workpiece, as well as simplifying the sewing process. It further ensures a high outputof finished pieces and the making of false trouser creases, to
  • FIG. 1 shows the apparatus object of the present invention, in perspective
  • FIG. 2 is a partial plan of the same apparatus
  • FIG. 3 is a perspective of the rectangular guide means and workpiece retaining means.
  • the apparatus object of the present invention comprises a bed 10 formed of a sewing surface 11 with a pair of side shoulder 12 and a centre'shoulder 13, and having supporting feet 14 that are connected by a crosspiece 15.
  • a box 16 supported by the crosspiece 15 serving as container for the electro-pneumatic control circuit of the apparatus.
  • an auxiliary shelf 17 which may, for example, be used for holding the semiworked pieces to be sewn.
  • the usual control box 18 connected to the above-mentioned control circuit serving for controlling and starting the said apparatus.
  • a sewing machine 19 comprising a pressure foot 20 paired with the usual workpiece feed means (not shown) and a pair of needles 21 of the known sewing means of the said sewing machine.
  • the latter is provided at the front with a photoelectric cell 22 which, in the embodiment shown, serves to stop the machine and for other operations required when the workpiece to be sewn has completely passed underneath the pressure foot 20, indicating that the working cycle has come to an end. Similar operations may be, for example, the raising of the pressure foot, the action of an auxiliary work stop device, cutting of the sewing threads etc.
  • auxiliary stoppingdevice 23 for locking the workpiece at the end of the cycle and to permit cutting of the sewing threads when the workpiece is no longer retained by the pressure foot 20.
  • rectilinear guide means 24 On the sewing surface 11 in front of the needles are positioned rectilinear guide means 24 (see also FIG. 2) on which the workpiece 25 to be sewn is spread out by means of a double line of stitches 26 made in known manner and fixed to lower part of the workpiece by a single looper thread (not shown) in the manner normally used to make false creases in trousers.
  • Retaining means 27 mounted in rectilinear guide 24 are also provided for stretching the workpiece 25 during the sewing operations, when the feed means of the machine move it from the feed point to the sewing station.
  • a second cable 31 return to the case taken as example, which are'perfectly straight and therefore of high quality product.
  • the retaining means 27 When the retaining means 27 are no longer engaged by the workpiece, they are returned by the counterweight 28 to a stop 33, the position of which is regulatable along the rectilinear guide menas 24, so that the starting position of the said retaining means 27 can be determined according to the requirements.
  • the retaining means 27 comprise a pad 34 with the end 35 pointing toward the sewing means 19 of the apparatus to which is pivoted in known manner a support 36.
  • Support 36 has means for engaging the workpiece, and is here shown as a vertical pin 37. The said pin serves to hold the workpiece to be sewn.
  • the pad 34 is directly hooked on its end furthest from machine 19 to the cable 31 and moves under the effect of the counterweight 28 along the rectilinear guide means, or else is moved by the workpiece being fed to the sewing means or by the counterweight, when it is no longer attached to the said workpiece.
  • the said rectilinear guide means consist of a rail 38 with a longitudinal slot 39, along which pad 34 moves and from which the pin 37 of the retaining means 27 extends to grip the workpiece rail.
  • the end of the rail 38 near the needles 21 of the sewing means is provided with a sliding ramp 40 pointing downward and along which the support 36 of the retaining means 27 can slide at the end of the working stroke, as clearly shown in FIG. 3, so that the pin 37 will now point downward and automatically free the workpiece 25.
  • the forward travel of the retaining means 27 is ensured by the said workpiece 25, one end of which is placed under the pressure foot 20, at the beginning of the work cycle while the other end is fixed to the pin 37. In this way, when the machine is functioning, the workpiece and the retaining means 27 are fed forwardly by the feeding means.
  • the support 36 swings downward, so that the workpiece leaves the pin 37 and continues to move freely through the short distance separating the ramp 40 from the said needles.
  • the pad 34 To damp the impact of the pad 34 against the stop 33, the latter is fitted with a base 42 inserted into the rail 38, hollow, and is provided with a helical spring 43 through which the cable 31 extends. In this way the pad 34 does not come into direct contact with the stop, but rather against the said spring.
  • the said base 42 On the top, the said base 42 is fitted with a shaped blade 44 acting as safety for the operator against possible injury caused by the pin 37 when it is in resting or starting position.
  • the workpiece to be sewn can be inserted into the above-described apparatus in two ways or cycles: by hooking the workpiece first to the retaining means 27 and inserting it then under the pressure foot (first working cycle) or else by inserting it first under the pressure foot and then hook it to the retaining means (second working cycle).
  • the first method, or first working cycle is carried out by lowering the pressure foot onto the workpiece and starting the machine simultaneously as a single operation, while the second method or second working cycle requires first the lowering. of the pressure foot onto the workpiece and, subsequently, the starting of the sewing machine after hooking the workpiece to the said retaining means. This second method is preferred when the false crease begins far inside the workpiece.
  • the control box 18 contains a pushbutton 45 connecting the apparatus to the mains; a selector 46 for choosing the working cycle or using two distinct operations; a starting pushbutton 47 for simultaneously lowering the pressure foot and starting the machine once the selector has been set in this manner, or else, lower first the pressure foot, if the selectorlector gives the second work cycle.
  • a further pushbutton 49 in the control box serves to restart the machine in case of an incidental stopping thereof before the end of the cycle, for example because of thread break or similarly.
  • a pushbutton 50 serves as emergency stop at any point of the working cycle.
  • a first timer 51 for varying the time interval between the moment the photoelectric cell 22 is being illuminated by its own excitation lamp after the workpiece has moved away and the instant in which the pressure foot 20 is leaving the workpiece, or else the sewing machine must stop
  • a second timer 52 for varying the time interval between tha above-mentioned moment and that at which an auxiliary work stopping device is engaged
  • a workpiece counter 53 for recording the number of working cycles which have been completed.
  • a special pedal 54 permits the raising of the pressure foot from the workpiece, without causing any change in the chosen cycle.
  • the here given embodiment relates to a machine for the making of false creases for trousers according to the method using two needles and a single looper, so that the fabric is plied underneath between the two parallel lines of stitches to form an upside crease.
  • a seaming apparatus which includes a bed having a sewing surface and a sewing machine having means for feeding and for sewing a workpiece, the combination comprising,
  • a. rectilinear guide means mounted on the sewing surface and extending from a position adjacent a needle of the sewing machine in a direction substantially parallel to the direction of travel of a workpiece when it is being seamed;
  • retaining means mounted within said rectilinear guide means for sliding movement in a forward stroke toward a most forward location adjacent the needles of the sewing machine and a return stroke away from the sewing machine, said retaining means, (b), comprising,
  • the rectilinear guide means are formed of a hollow rail to receive the said retaining means; the said rail being provided at the upper part with a slit, through which the said retaining means project and along which they move.
  • said rectilinear guide means are formed of a hollow rail to receive-the said retaining means, the said rail being provided at the upper part thereof with a slit through which said means located on said support to attach said support to the workpiece projects.
  • stop comprises a base inserted into the hollow rail of the rectilinear guide means, the said base being provided with spring for damping the impact of the retaining means.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US459053A 1973-05-22 1974-04-08 Apparatus for the making of straight seams, for example false creases in trousers Expired - Lifetime US3903818A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT24369/73A IT987775B (it) 1973-05-22 1973-05-22 Apparecchiatura per la formazione di cuciture diritte come ad esem pio una finta piega di pantaloni

Publications (1)

Publication Number Publication Date
US3903818A true US3903818A (en) 1975-09-09

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ID=11213291

Family Applications (1)

Application Number Title Priority Date Filing Date
US459053A Expired - Lifetime US3903818A (en) 1973-05-22 1974-04-08 Apparatus for the making of straight seams, for example false creases in trousers

Country Status (4)

Country Link
US (1) US3903818A (it)
ES (1) ES426498A1 (it)
GB (1) GB1454964A (it)
IT (1) IT987775B (it)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013025A (en) * 1975-02-27 1977-03-22 Rockwell-Rimoldi S.P.A. Fabric tensioning device for sewing and assembly units
US4030430A (en) * 1974-02-16 1977-06-21 William Prym-Werke Kg Apparatus for sewing slide fasteners to elastic carriers
US4036156A (en) * 1974-12-05 1977-07-19 Pfaff Industriemaschinen Gmbh Device for sewing together plies of material adjusted to equal lengths
US4037546A (en) * 1976-07-27 1977-07-26 Union Special G.M.B.H. Sewing machine apparatus for aligning and sewing pieces of textile fabric or the like
US4062309A (en) * 1974-11-14 1977-12-13 Durkoppwerke Gmbh Automatic feed device for sewing machine
US4066027A (en) * 1975-05-14 1978-01-03 Rockwell-Rimoldi S.P.A. Workpiece feeder device for the traveling gripper of a sewing unit
US4102280A (en) * 1976-02-23 1978-07-25 Durkoppwerke Gmbh Feed device for flexible workpieces, especially for a sewing machine
US4116142A (en) * 1976-10-29 1978-09-26 Rockwell-Rimoldi S.P.A. Workpiece tensioning device for a sewing unit
US4140068A (en) * 1976-07-30 1979-02-20 Pfaff Industriemaschinen Gmbh Guiding device for sewing material
US4195830A (en) * 1976-07-30 1980-04-01 Pfaff Industriemaschinen Gmbh Guiding device for sewing material
US4227471A (en) * 1977-06-28 1980-10-14 Durkoppwerke GmbH Bielefeld Sewing-machine guide for edge-parallel seaming of a workpiece
US4292908A (en) * 1978-10-02 1981-10-06 Levi Strauss & Co. Hemmer-seamer
US4615288A (en) * 1984-03-09 1986-10-07 Yoshida Kogyo K. K. Mechanism for drawing an elongated sewn product from a sewing machine
ITAN20100122A1 (it) * 2010-07-21 2012-01-22 Derim Srl Sistema di unione mediante cucitura di teli di materiali di diverso genere movimentati per mezzo di pinze trasportatrici e tensionatrici autonome tra loro ed azionate elettronicamente in sincronismo con la testa cucitrice.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US841480A (en) * 1904-05-13 1907-01-15 Henry H Bates Fabric withdrawing or feeding means for sewing-machines.
US1049304A (en) * 1911-06-12 1912-12-31 Thomas Kenyon Stripping means for machines for stitching together piece ends.
US1346988A (en) * 1918-02-23 1920-07-20 Stein Abraham Work holder and guide for sewing-machines
US1460891A (en) * 1918-06-22 1923-07-03 Singer Mfg Co Sewing machine
US1462521A (en) * 1921-02-19 1923-07-24 Decimo Foglia Stitching mechanism
US1661023A (en) * 1926-02-02 1928-02-28 Turner Vernon Sewing machine
US1846536A (en) * 1930-01-21 1932-02-23 Walker George Walter Conductor wire reel box

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US841480A (en) * 1904-05-13 1907-01-15 Henry H Bates Fabric withdrawing or feeding means for sewing-machines.
US1049304A (en) * 1911-06-12 1912-12-31 Thomas Kenyon Stripping means for machines for stitching together piece ends.
US1346988A (en) * 1918-02-23 1920-07-20 Stein Abraham Work holder and guide for sewing-machines
US1460891A (en) * 1918-06-22 1923-07-03 Singer Mfg Co Sewing machine
US1462521A (en) * 1921-02-19 1923-07-24 Decimo Foglia Stitching mechanism
US1661023A (en) * 1926-02-02 1928-02-28 Turner Vernon Sewing machine
US1846536A (en) * 1930-01-21 1932-02-23 Walker George Walter Conductor wire reel box

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030430A (en) * 1974-02-16 1977-06-21 William Prym-Werke Kg Apparatus for sewing slide fasteners to elastic carriers
US4062309A (en) * 1974-11-14 1977-12-13 Durkoppwerke Gmbh Automatic feed device for sewing machine
US4036156A (en) * 1974-12-05 1977-07-19 Pfaff Industriemaschinen Gmbh Device for sewing together plies of material adjusted to equal lengths
US4013025A (en) * 1975-02-27 1977-03-22 Rockwell-Rimoldi S.P.A. Fabric tensioning device for sewing and assembly units
US4066027A (en) * 1975-05-14 1978-01-03 Rockwell-Rimoldi S.P.A. Workpiece feeder device for the traveling gripper of a sewing unit
US4102280A (en) * 1976-02-23 1978-07-25 Durkoppwerke Gmbh Feed device for flexible workpieces, especially for a sewing machine
US4037546A (en) * 1976-07-27 1977-07-26 Union Special G.M.B.H. Sewing machine apparatus for aligning and sewing pieces of textile fabric or the like
US4140068A (en) * 1976-07-30 1979-02-20 Pfaff Industriemaschinen Gmbh Guiding device for sewing material
US4195830A (en) * 1976-07-30 1980-04-01 Pfaff Industriemaschinen Gmbh Guiding device for sewing material
US4116142A (en) * 1976-10-29 1978-09-26 Rockwell-Rimoldi S.P.A. Workpiece tensioning device for a sewing unit
US4227471A (en) * 1977-06-28 1980-10-14 Durkoppwerke GmbH Bielefeld Sewing-machine guide for edge-parallel seaming of a workpiece
US4292908A (en) * 1978-10-02 1981-10-06 Levi Strauss & Co. Hemmer-seamer
US4615288A (en) * 1984-03-09 1986-10-07 Yoshida Kogyo K. K. Mechanism for drawing an elongated sewn product from a sewing machine
ITAN20100122A1 (it) * 2010-07-21 2012-01-22 Derim Srl Sistema di unione mediante cucitura di teli di materiali di diverso genere movimentati per mezzo di pinze trasportatrici e tensionatrici autonome tra loro ed azionate elettronicamente in sincronismo con la testa cucitrice.

Also Published As

Publication number Publication date
GB1454964A (en) 1976-11-10
IT987775B (it) 1975-03-20
ES426498A1 (es) 1976-07-01

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