EP0216644A1 - Steuereinrichtung für weiche, nichtflächige Werkstücke an Nähmaschinen - Google Patents

Steuereinrichtung für weiche, nichtflächige Werkstücke an Nähmaschinen Download PDF

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Publication number
EP0216644A1
EP0216644A1 EP86401500A EP86401500A EP0216644A1 EP 0216644 A1 EP0216644 A1 EP 0216644A1 EP 86401500 A EP86401500 A EP 86401500A EP 86401500 A EP86401500 A EP 86401500A EP 0216644 A1 EP0216644 A1 EP 0216644A1
Authority
EP
European Patent Office
Prior art keywords
fabric
wheel
signal
edge
circuit
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
EP86401500A
Other languages
English (en)
French (fr)
Other versions
EP0216644B1 (de
Inventor
Christian Huau
Pierre Jean Alphonse Facon
Alain Pelleray
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.)
ALAIN ROULEAU EN PATRICK ROULEAU BEIDEN TE TOULOUS
Original Assignee
Bertin et Cie SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from FR8511858A external-priority patent/FR2585683B1/fr
Priority claimed from FR8511859A external-priority patent/FR2585684B1/fr
Application filed by Bertin et Cie SA filed Critical Bertin et Cie SA
Priority to AT86401500T priority Critical patent/ATE46726T1/de
Publication of EP0216644A1 publication Critical patent/EP0216644A1/de
Application granted granted Critical
Publication of EP0216644B1 publication Critical patent/EP0216644B1/de
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B35/00—Work-feeding or -handling elements not otherwise provided for
    • D05B35/10—Edge guides
    • D05B35/102—Edge guide control systems with edge sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H43/00—Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable
    • B65H43/08—Photoelectric devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B65H7/14—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors by photoelectric feelers or detectors
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B35/00—Work-feeding or -handling elements not otherwise provided for
    • D05B35/10—Edge guides
    • D05B35/107—Fixed or adjustable pin holding the work, e.g. for circular or spiral stitching
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/04—Lower casings
    • D05B73/12—Slides; Needle plates
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2207/00—Use of special elements
    • D05D2207/02—Pneumatic or hydraulic devices
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2209/00—Use of special materials
    • D05D2209/04—Use of special materials with high friction
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2209/00—Use of special materials
    • D05D2209/08—Use of special materials elastic, e.g. rubber spring
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2303/00—Applied objects or articles
    • D05D2303/02—Tape
    • D05D2303/04—Tape elastic

Definitions

  • the invention relates to an assembly for guiding sheets of flexible material intended to form a three-dimensional assembly, said assembly comprising a drive device formed by at least one support plate, a drive wheel pressing a sheet to be guided on the support plate, drive wheel control means, and a sheet edge position detector for controlling the drive device, said detector comprising at least one photoelectric detector disposed in front of the edge, serving guiding the piece of fabric and the electronic circuits, transforming the signal delivered by the photoelectric detector into a control signal from the drive device.
  • the assembly of flexible parts in a three-dimensional shape is mainly encountered in the clothing industries. Indeed, the confection of clothes consists in assembling pieces of fabric more or less deformable to form a surface intended to cover a volume. The assembly is carried out for fabrics, whatever their texture, by sewing. Two cases can arise depending on whether or not the pieces can be superimposed before sewing.
  • Conventional sewing machines generally include a mechanism providing the inter-looping of the sewing thread (s) and a mechanism for advancing the fabric.
  • This advance mechanism consists of an elliptical movement claw and a presser foot between which the fabric passes.
  • the longitudinal amplitude of the claw movement determines the length of the stitch and is generally adjustable.
  • the parts to be assembled are guided relative to their edges which the operator superimposes as exactly as possible.
  • Actuators can take many forms, however it seems that only claw and wheel actuators have had some developments, with a preference for the latter, the implementation of which is easier.
  • the wheel actuators of the known technique can be divided into two groups: those with free wheel and fixed direction, and those with controlled wheel and fixed direction.
  • French Patent No. 2,241,648 describes an actuator of the first group whose free wheel makes an angle with the direction of advance of the piece of fabric so as to impart thereto a rotational movement, limited by the abutment of the edge of the fabric along a guide whose curvature corresponds to the orientation necessary for the formation of a three-dimensional assembly seam, the second piece of fabric, possibly being guided by the same device.
  • This process has a certain number of drawbacks among which it is necessary to point out a use limited to fabrics sufficiently rigid so that their edge can be effectively guided by the guide, and the need to have as many guides as there are tailoring models and sizes.
  • the guiding device furthermore comprises means for adjusting the pressure of the wheel on the cloth so as to ensure a contact pressure which depends, among other things, on the material, the thickness and the weaving.
  • the position detector comprises at least one photoelectric detector disposed in front of one of the faces of a plate intended to separate, to allow their positioning, two pieces of fabric to be assembled by sewing.
  • the photoelectric detector is made up of two pairs of light-emitting diodes and photo-transistors.
  • the reference position from which the position of the edge of the fabric is checked, is that for which the edge is centered between the two diodes.
  • a second similar photoelectric detector is mounted on the other side of the separation plate to detect the edge of the second piece of fabric.
  • the electrical signals supplied by the photoelectric detectors are sent into an electronic processor device which matches the signals received for each piece of fabric with reference values stored in memory and acts on the drive circuits of the motors of a device for guiding pieces of fabric.
  • Controlling the rotation of the wheel by the position sensor based on an all-or-nothing response, produces relatively large trajectory changes and short amplitudes which create wrinkling of the fabric when loading steering and does not allow not get curved seams of small radius.
  • the analog device no more than the logic system (all or nothing) does not allow the treatment of fabrics of irregular transparency such as lace, tulle, or printed fabrics with strong variations in density.
  • the openwork fabrics have, after cutting, very jagged edges and, in the case of tulle, in the case of threads separated by spaces greater than their diameter.
  • the presence of gaps inside the fabric in the field of the photoelectric detector prevents the use of simple analog sensors measuring the level of obscured surface.
  • the scrolling of the edge of an openwork fabric in front of a supposed sensor capable of detecting the precise position of the apparent edge and not of the cut will give an analog signal reproducing the fluctuations of this apparent edge. These fluctuations are due to the displacement of the line that cut in front of the sensor and to the presence of gaps in the fabric along this line. We must therefore be able to distinguish these two causes in order to reconstruct the cutting line that the seam must follow.
  • the subject of the invention is a guide assembly the drive device of which comprises a drive wheel which can be oriented as a function of the desired curvature, the speed of rotation of which is mechanically controlled by its orientation and the edge position detector of which allows , from the detection of the apparent edge of the fabric, to reconstruct the cutting line parallel to which the seam is to be executed.
  • Figures 1 to 3 show a sewing machine equipped with a guide assembly comprising a a training device M and an edge detector N.
  • the drive device is shown on a larger scale in FIG. 2, mounted on a machine head containing the mechanism for actuating the needle rod 2 at the end of which is fixed the needle 3 and the lowering mechanism and presser foot lifter 4.
  • the head further includes the mechanism for feeding and guiding the needle thread (not shown).
  • the table 5 (FIG. 3) carries the needle plate 6 in which are provided openings for the passage of the feed means constituted by the claw 7 and a needle passage hole 8.
  • the claw is animated with an alternating movement which causes the teeth to periodically protrude from the plate simultaneously with their movement from the front to the rear of the machine (for an observer looking at the machine according to FIG. 1), the return of the claw s performing, the teeth being below the plate.
  • the table also carries the stitch formation mechanism by interlocking the needle thread with the bobbin thread.
  • the pieces of the fabric to be assembled by sewing are introduced once positioned on the needle plate where they are held by the pressure of the lifting presser foot.
  • the synchronization of the various movements of the mechanical parts of the machine is designed so that when the needle passes through the parts of the fabric to loop the sewing threads, these are kept stationary.
  • the claw protrudes from the needle plague and presses the fabric against the presser foot and drives it backwards, bringing between the foot presser and needle plate a length of fabric corresponding to the length of the stitch.
  • the drive device is positioned in front of the needle plate, and comprises a spherical wheel 9 which presses on one of the pieces of fabric to be guided.
  • the wheel is freely movable around an axis 10, parallel to the surface of the fabric, fixed by one of its ends on a wing 11 of a bracket 12 whose other wing 13 is fixed to a shaft 14, mobile around its axis in bearings 15, 16 fixed to a fixed frame 17.
  • the shaft 14 and the axis 10 of the wheel are, according to the embodiment, perpendicular and the axis of the shaft 14 passes through the center of the spherical wheel.
  • the shaft 14 is provided with an angular position measuring device 18 consisting, for example, of a circular potentiometer and carries at its free end rotation control means consisting of a servo motor 19 controlled by an electronic edge detection device which will be described later.
  • the stators of the potentiometer and servo-motor are fixed by a spacer 20 to the fixed frame 17.
  • the wheel 9 is rotated about its axis 10 by a roller 21 whose axis 22 is in a plane containing the axis 10 of the wheel, preferably in the - horizontal plane orthogonal to the shaft 14.
  • the roller occupies a fixed position relative to the frame 17 on which it is held by a bearing.
  • the roller is rotated by a mechanical transmission consisting at least in part of a set of pulleys 23, 24 and belt 25.
  • This set is itself driven by a transmission 26 connected directly or indirectly to a power take-off 27 on the main shaft of the machine.
  • the speed of rotation thus communicated to the roller is linked to that of the machine and therefore is a function of the speed of advance of the parts under the seam forming mechanism.
  • the roller 21 drives the spherical wheel 9 in circles whose diameter depends on the orientation of the latter. As the piece of fabric is always driven at the same point situated on a large circle of the wheel, the speed at this point will vary inversely proportional to the diameter of the circle along which the roller will drive the wheel.
  • FIG. 4 makes it possible to understand the principle of the variation of the drive speed as a function of the position of the wheel in front of the roller whose speed is considered constant.
  • the spherical wheel 9 is oriented in a first position I (in solid lines) oriented so that its plane of symmetry is coincident with the plane of symmetry of the roller 21.
  • the synchronous mechanical drive of the movement of the main shaft of the machine is replaced by a servomotor 230 (shown in broken lines) making it possible to communicate to the wheel, via the roller, a tangential speed producing a drive of the part to be guided at a speed of which a component parallel to the direction of movement of the claw is constant and equal to the speed of advance of the parts to be assembled.
  • the guide assembly comprises a separation device 28 consisting of a support plate 29 comprised between two support plates 30 , 31 disposed respectively above and below the plate 29 and at a distance from the support plate, corresponding approximately to the thickness of the pieces of fabric 32, 33 to be assembled.
  • the support plates carry an opening 34 ensuring the passage of the wheel of the device for driving the piece of fabric, the wheel being in abutment against said piece of fabric.
  • the drive device to a guide assembly of a sewing machine, provision is made for guiding each of the pieces of fabric to be assembled.
  • the piece of fabric 33 passing between the support plate 31 and the support plate 29 is guided by a device at all points similar to the first, which is suggested in FIG. 2 by a portion of wheel 35 shown in phantom, arranged possibly opposite the first with respect to the support plate.
  • the pieces of fabric are guided, as known, by their edges: at least one of the edges being cut along the curve, projected onto the plane of the fabric, of the desired assembly and serving as a reference.
  • the guide assembly also includes an edge detector B which comprises edge detection means formed by a proportional photodetector 36 which will be described later.
  • the signals provided by the photodetector 36 are sent to an electronic device which detects the source signals and generates a signal which is sent to a comparator one of whose inputs receives a reference signal taking into account the orientation of the wheel given by the potentiometer 18.
  • the resulting signal controls a servo device comprising the servomotor 19 which controls the orientation of the wheel 9 in front of the roller 21.
  • Figure 5 is a geometric construction for understanding the operation of the guide device.
  • the straight lines D and E correspond respectively to a straight seam obtained by keeping constant the distance e from the straight edge E of the piece of fabric to the needle Ao
  • This piece of fabric is driven by the claw disposed upstream of the needle, at a speed Vo which is represented in intensity and direction by the vector Vo applied approximately to point A, as will be explained later.
  • the tracking of a curved line is done by superimposing a rotational movement of the fabric in advance given by the claw.
  • the supposedly rigid fabric has a velocity field which can be expressed by rotation around an instantaneous center of rotation 0 1. , 0 2 , 0 3 ...
  • This instantaneous center is located at l intersection of all the perpendiculars to the velocity vectors at each point of the fabric.
  • the perpendicular XX 'to the speed vector Vo given by the claw is a constant whatever the curvature of the seam since this speed is tangent to the seam by definition.
  • the instantaneous center of rotation is therefore always on this perpendicular. We will assume that this perpendicular passes through needle A, which is not true only approximately.
  • the angle ⁇ is the angle made by the diametrical plane of the wheel passing through the point of application B, it is also the angle made by the horizontal axis of the wheel with the line XX ', the point d intersection O 1 being an instantaneous center of rotation.
  • the point O 1 is the center of a curve C 1 of radius equal to O 1 F, F being the point of intersection of the edge of the fabric with the line XX '.
  • a modification of the radius of curvature of the seam will be obtained by modification of the orientation and intensity of the speed vector V1 .
  • the curve C 2 will be obtained by the application of a new speed vector V2 which will cause a displacement of the instantaneous center of rotation in O 2 .
  • the orientation of the wheel is limited on either side of the direction BH to an angle less than 45 ° depending on the importance of the horizontal axis around which spin the wheel. According to other embodiments, this angle can be greater or less, depending on the size of the spherical part of the wheel.
  • An example of the latter case corresponds to the vector V3 .
  • the edge detector P must be positioned so that the photodetector cells are on either side of the theoretical path of the edge of the part to be guided. Their position determines the distance "e" between the seam and the edge of the fabric. If the seam must have a succession of different curvatures, the position of the cells must theoretically be modified according to the progress of the seam to keep e constant. An equivalent result can be obtained using a row of cells of which only the two cells surrounding the theoretical path of the edge for the desired curvature are activated. In practice, the precision sought often does not require this correction.
  • training point B is dictated by the seam to be made and depends on the distance from this point to the nearest edge. Depending on the curvature of the seam, it can be on the other side of the straight line D passing through the needle.
  • the angular position of the drive wheel 9 is marked by the potentiometer 18 while the position of the edge of the fabric is marked by the edge position detector B comprising, - according to the embodiment shown, the photoelectric detector 36 disposed in an enclosure 37 fixed to the arm of the machine .
  • a mirror 38 transmits the light beam on the polished support plate 29 on which it is reflected.
  • the reflected beam falls on the photoelectric sensor consisting of a strip of diodes mounted on an integrated circuit, in a pitch of 0.1 mm.
  • the strip used, in the described application has 64 diodes, which allows a range of sight of 6.4 mm deemed sufficient.
  • the size of the diodes (0.1 mm) was chosen so that their width is less than the diameter of the threads constituting the fabric and in particular those constituting the mesh network of tulle or lace. The place of the thread can therefore be detected to the nearest 0.1 mm, which is sufficient to obtain a sewing precision of ⁇ 0.5 mm.
  • the light rays which fall on the fabric are diffused with a weak intensity while those which! fall alongside or in the gaps are reflected and concentrated by the optics towards the diode array.
  • the result is a set of weak signals in front of the fabric and strong outside.
  • the state of the various diodes 36 (FIG. 7) is observed by a cyclic scan clocked by signals 40 from a clock and defined by synchronization signals 41 from a multiplexer 42 to form a video signal.
  • the timing diagrams of the signals, shown in FIG. 8, correspond, in order to simplify the diagram, to a strip of ten photodiodes, while the embodiment uses a strip of 64 photodiodes.
  • each level represents the illumination of a photodiode.
  • the diagram corresponds to three successive scans I, II, III triggered by the three synchronization signals A, B, C and a single movement of the fabric, which explains the modification of the signal between each synchronization.
  • the low levels correspond to a hole in a mesh of a lace.
  • a threshold 43 is defined against which the signals are compared.
  • the comparator 44 which receives the threshold signal and the video signal, separates the levels and makes it possible to obtain an all-or-nothing signal 45.
  • comparator 44 is sent to a bi-stable flip-flop circuit 45.
  • the first presence of the fabric encountered generates a signal. which switches the bistable to state 1 shown in FIG. 8, it is only returned to state 0 at the end of scanning, that is to say on the arrival of the next signal of synchronization A.
  • a gate circuit 46 controlled by the output signal of the bistable allows a number of pulses of the clock signal 40 proportional to the position of the first photodiode marked by the edge of the fabric to pass.
  • a counting circuit 47 triggered by a synchronization signal 41, determines the number of pulses contained in each output signal of the bistable passing through the gate circuit 46, between two synchronization signals 41. The result of the counting is then transferred in a transfer register 48 by a transfer control circuit 49, which also ensures the reset of the counter 47, controlled by the synchronization signal after time shift.
  • the count value previously obtained is translated into voltage by a digital analog converter 50.
  • a signal proportional to the distance separating the edge of the fabric from the end of the bar is thus obtained.
  • This edge signal faithfully follows the shape obtained after cutting, including the contour of the gaps cut by the cutting line in the openwork fabrics.
  • a second signal processing is necessary to reconstruct the cutting line, and will consist in making a peak-to-peak tracking of the edge signal, so as to skip the gaps.
  • the analog signal obtained in the first processing is sent to a correction circuit 51 which transforms it into a peak signal.
  • This correction is obtained from two time constants, a short one which quickly takes the maximum value, a longer one which allows the minimum acceptable curve to be followed by guiding the fabric.
  • the signal obtained at the output of the correction circuit 51 is sent to a framing circuit 52 where it is calibrated and exits in the form of a signal e 2 .
  • the signal from the angular position sensor 18 is also sent to a framing circuit 53 where it is calibrated in the form of a signal e 1 .
  • the signals e 1 and e 2 are sent in a comparison and control circuit 54 and (FIG. 9) consisting, according to the example, of at least three comparator circuits 55, 56, 57 (for example SIEMENS TCA 965) of which the outputs are associated with three relays 58, 59, 60.
  • the circuit 58 makes it possible to limit the speed of the servomotor 19 by interposing a series resistor R, and the circuits 59 and 60 define the direction of rotation ROT + and ROT- and l 'engine stop by presence at its terminals of the same polarity.
  • the comparator 55 receives the signal e 1 which it compares to two maximum and minimum byte values. These two values are sent to the comparator 57 which receives the values of e 1 and e 2 .
  • One of the relays. 59 of the motor circuit is actuated by the signal e 1 > e 2 + ⁇ 1 , ⁇ 1 being the tripping value, the other relay 60 is actuated by the signal e 1 ⁇ e 2 - ⁇ 1 .
  • the motor finds the same polarity at its terminals and remains stationary, otherwise it turns in one direction or the other.
  • Comparator 56 compares the absolute value of the difference in signals e 1 and e 2 with a trigger value ⁇ 2 to put or remove a speed limitation resistor on the motor circuit.
  • the tangential speed of the drive wheel varied automatically with its orientation, that is to say that the drive device included a spherical wheel driven by a roller 21 at constant speed, as previously described.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP86401500A 1985-08-02 1986-07-04 Steuereinrichtung für weiche, nichtflächige Werkstücke an Nähmaschinen Expired EP0216644B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86401500T ATE46726T1 (de) 1985-08-02 1986-07-04 Steuereinrichtung fuer weiche, nichtflaechige werkstuecke an naehmaschinen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8511858A FR2585683B1 (fr) 1985-08-02 1985-08-02 Dispositif d'entrainement pour ensemble de guidage de feuilles de materiau souple destinees a former un assemblage tridimensionnel
FR8511858 1985-08-02
FR8511859 1985-08-02
FR8511859A FR2585684B1 (fr) 1985-08-02 1985-08-02 Detecteur de position du bord d'une piece d'etoffe pour la commande d'un dispositif d'entrainement

Publications (2)

Publication Number Publication Date
EP0216644A1 true EP0216644A1 (de) 1987-04-01
EP0216644B1 EP0216644B1 (de) 1989-09-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP86401500A Expired EP0216644B1 (de) 1985-08-02 1986-07-04 Steuereinrichtung für weiche, nichtflächige Werkstücke an Nähmaschinen

Country Status (3)

Country Link
US (1) US4730824A (de)
EP (1) EP0216644B1 (de)
DE (1) DE3665894D1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292135A3 (de) * 1987-05-20 1989-02-15 Porter Sewing Machines, Inc. Verfahren und Vorrichtung, um die zu nähenden Stücke zum Nähpunkt einer Nähmaschine zuzuführen
WO1992004493A1 (en) * 1990-09-01 1992-03-19 British United Shoe Machinery Limited Automatic sewing machine system
WO1997047797A1 (fr) * 1996-06-14 1997-12-18 Patrick Rouleau Dispositif de guidage de materiau a coudre applique au droit du pied-presseur, procede de couture automatique et machine a coudre
FR2749861A1 (fr) * 1996-06-14 1997-12-19 Rouleau Patrick Dispositif de guidage de materiau a coudre applique au droit du pied-presseur, procede de couture automatique et machine a coudre
FR2749862A1 (fr) * 1996-06-14 1997-12-19 Rouleau Patrick Dispositif de guidage de materiau a coudre applique lateralement et commande en tout ou rien, procede de couture automatique et machine a coudre

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DE3710258A1 (de) * 1987-03-28 1988-10-13 Heidelberger Druckmasch Ag Vorrichtung zum transport von bogen, beispielsweise papierbogen
DE3804576A1 (de) * 1987-03-28 1988-10-06 Heidelberger Druckmasch Ag Vorrichtung zum foerdern und ausrichten von bogen bei bogenverarbeitenden maschinen
US4836119A (en) * 1988-03-21 1989-06-06 The Charles Stark Draper Laboratory, Inc. Sperical ball positioning apparatus for seamed limp material article assembly system
JPH0732827B2 (ja) * 1989-01-27 1995-04-12 ハムス株式会社 タコ巻縫いミシンにおける布端の振れ修正装置
FR2665191B1 (fr) * 1990-07-27 1992-11-20 Rouleau Patrick Dispositif de guidage de tissu et procede de couture automatique.
DE59806827D1 (de) * 1998-10-30 2003-02-06 Johannes Sahl Nähmaschinezubehör
US20060070093A1 (en) * 2004-09-30 2006-03-30 Joy Mangano Combination candle centerpiece and side loading music CD player
JP2007014556A (ja) * 2005-07-07 2007-01-25 Ykk Corp 生地片の縁縫装置
US7444951B2 (en) * 2006-11-21 2008-11-04 Ykk Corporation Curved edge sewing systems
US8997670B2 (en) * 2010-03-18 2015-04-07 Wayne J. Book Conveyance system that transports fabric
US8850999B1 (en) * 2011-02-10 2014-10-07 Daniel K. Kalkbrenner Sewing machine feed device
DE102015200720B4 (de) * 2014-07-02 2021-05-20 Adient Luxembourg Holding S.À R.L. Zuführeinrichtung und Fertigungsvorrichtung zum Vernähen von Zuschnitten gleicher Kontur
DE102017107480A1 (de) * 2017-04-07 2018-10-11 Schmale-Holding Gmbh & Co. Verfahren und Vorrichtung zum Ausrichten eines Flächenbereiches eines flexiblen Materialstückes

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US3899986A (en) * 1974-03-27 1975-08-19 Stahl Urban Co Apparatus for guiding limp material
DE3043852A1 (de) * 1980-11-21 1982-07-01 Koninklijke Textielfabrieken Nijverdal-Ten Gate N.V., Almelo Verfahren zum feststellen von signal-abweichungen unter zuhilfenahme ines integrierenden differenzverstaerkers
FR2503201A1 (fr) * 1981-04-06 1982-10-08 Textima Veb K Procede et dispositif pour regler et agir sur la forme d'une couture
DE3346163C1 (de) * 1983-12-21 1985-04-11 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Verfahren zum mustergerechten Zusammennaehen von Stoffteilen

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US3899986A (en) * 1974-03-27 1975-08-19 Stahl Urban Co Apparatus for guiding limp material
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292135A3 (de) * 1987-05-20 1989-02-15 Porter Sewing Machines, Inc. Verfahren und Vorrichtung, um die zu nähenden Stücke zum Nähpunkt einer Nähmaschine zuzuführen
WO1992004493A1 (en) * 1990-09-01 1992-03-19 British United Shoe Machinery Limited Automatic sewing machine system
WO1997047797A1 (fr) * 1996-06-14 1997-12-18 Patrick Rouleau Dispositif de guidage de materiau a coudre applique au droit du pied-presseur, procede de couture automatique et machine a coudre
FR2749861A1 (fr) * 1996-06-14 1997-12-19 Rouleau Patrick Dispositif de guidage de materiau a coudre applique au droit du pied-presseur, procede de couture automatique et machine a coudre
FR2749862A1 (fr) * 1996-06-14 1997-12-19 Rouleau Patrick Dispositif de guidage de materiau a coudre applique lateralement et commande en tout ou rien, procede de couture automatique et machine a coudre
US5941187A (en) * 1996-06-14 1999-08-24 Rouleau; Patrick Device for guiding a sewn material perpendicularly to a presser foot, automatic sewing method and sewing machine

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US4730824A (en) 1988-03-15
DE3665894D1 (en) 1989-11-02
EP0216644B1 (de) 1989-09-27

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