Patents Assigned to Durkopp Adler
  • Patent number: 5280759
    Abstract: An automatic sewing device for the sewing of workpieces of different size, such as collars, cuffs or the like, the workpieces having a seam section extending in a straight line where they differ in size, has a workpiece holding plate to press the workpiece on a bearing plate and to displace it on the bearing plate. The workpiece holding plate has two seam forming sections of maximum possible size and is made in one piece. Further devices are provided for shifting the workpiece holding plate after a 1st seam contour section has been sewn to move said workpiece holding plate with respect to said 1st seam contour section to a position of the workpiece holding plate where a second seam forming section corresponds to a second seam contour section.
    Type: Grant
    Filed: August 28, 1991
    Date of Patent: January 25, 1994
    Assignee: Durkopp Adler Aktiengesellschaft
    Inventor: Hans Scholl
  • Patent number: 5272994
    Abstract: So as to sew a pocket-flap to a workpiece, the pocket-flap and a cut-out pocket are positioned relative to each other at a predetermined distance, in which they do not overlap, and relative to the workpiece. The workpiece, the cut-out pocket and the flap are conveyed to a sewing position without being displaced one in relation to the other. In the sewing position the cut-out pocket and the workpiece are joined together by means of a seam. The pocket-flap is then moved from a first position into a second position, in which it partially overlaps the cut-out pocket. It is then connected with the workpiece by a fastening seam.
    Type: Grant
    Filed: July 15, 1992
    Date of Patent: December 28, 1993
    Assignee: Durkopp Adler Aktiengesellschaft
    Inventors: Hans Scholl, Jochen Fischer
  • Patent number: 5259328
    Abstract: A cutting device for a sewing system having a work table, and a material clamp on the work table for transporting sewing material to a cutting point. The cutting device includes two wedge-shaped knives arranged at the cutting point, for producing gusset cuts in the material, and an elongated opening in the work table for allowing the wedge-shaped knives to pass through the work table to cut the material. The cutting device further includes a clamping device for clamping the material at the cutting point so as to increase the tension in the material and thereby increase the controllability of the location at which the wedge-shaped knives make the gusset cuts. Preferably the camping device which includes two transversely movable clamp halves tightens the sewing material transverse to the direction of transport of the sewing material. Further, a slide plate attached to the surface of the work table includes shoulders or tensioning beads for tensioning the material.
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: November 9, 1993
    Assignee: Durkopp Adler Aktiengesellschaft
    Inventors: Thomas Noltge, Klaus Moller
  • Patent number: 5249540
    Abstract: A sewing-material feeding device for a sewing machine has an upper material feeder and a lower material feeder which coact for feeding the sewing material, the lower material feeder being adjacent to the throat plate. The needle passes downward through an extension associated with the upper material feeder, the extension defining a downward-facing resting surface, the resting surface obstructing upward movement of said sewing material and thereby reducing fluttering of the sewing material as the needle is pulled upward and out of the sewing material. A tongue adjacent the throat plate is urged upward and against a portion of the upper material feeder so as to further reduce fluttering of the sewing material as the needle is pulled upward and out of the sewing material. The tongue has a throat hole for receiving the needle when it pierces the sewing material and passes into the throat plate.
    Type: Grant
    Filed: July 24, 1991
    Date of Patent: October 5, 1993
    Assignee: Durkopp Adler Aktiengesellschaft
    Inventor: Reinhard Sielemann
  • Patent number: 5237943
    Abstract: In addition to a sewing machine, a sewing unit has a workpiece holder, which has two workpiece bearing plates displaceable relative to each other, a holding bar, a folding, bar, a thrower device, a cloth slider and a folding device. By these devices, first and second trouser parts having rim strips are faced and overlapped inside-out onto a zipper. The front inseam is sewn, then the rim strip of the second trouser part is folded over and a first zipper seam is sewn. The second trouser part is folded over right-side out and the j-seam is sewn. The rim strips of the first and second trouser parts can be folded before sewing, seam locks can be provided, and a lower covering strip can be provided to the zipper as well. Thus, all three seams can be sewn with a single sewing arrangement.
    Type: Grant
    Filed: October 30, 1991
    Date of Patent: August 24, 1993
    Assignee: Durkopp Adler AG
    Inventors: Michael Klein, Benny Lapp, Ole Nielsen
  • Patent number: 5232078
    Abstract: An overhead conveyor for articles to be transported suspended from hangers, the conveyor having at least one delivery point (A) at which the hangers are to be automatically delivered from a conveyor line into a second line. A swingable slide rail is provided at the delivery point, the rail being adapted to be brought from an upper position of rest into a lower inclined operating position by the weight of a clothing hanger present on it. When the slide rail is in its inclined operating position, a clothing hanger resting on it slides down the slide rail toward a receiving rod in the second line. When the slide rail is in its position of rest, hangers which are not to be delivered are able to pass by the slide rail without being obstructed.
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: August 3, 1993
    Assignee: Durkopp Adler Aktiengesellschaft
    Inventors: Walter Kuhlmann, Klaus Niesen
  • Patent number: 5230294
    Abstract: A zip-fastener feeding device for an automatic sewing unit comprises an introduction device, an endless drawing means guided via a drive wheel and via deflection pulleys and a guiding device. Zip fasteners can be introduced through the introduction device by means of the drawing means by at least one guiding channel of the guiding device onto a workpiece retaining plate or a zip-fastener retainer provided in the latter and these zip fasteners can be precisely positioned there.
    Type: Grant
    Filed: May 8, 1992
    Date of Patent: July 27, 1993
    Assignee: Durkopp Adler Aktiengesellschaft
    Inventor: Michael Klein
  • Patent number: 5201273
    Abstract: The presser device includes a feeder foot, a holding foot and a link transmission provided between the two feet, the two feet cooperating alternately. The feeder foot has a spur which cooperates temporarily with a mating surface on the cloth feeder. During the feed phase, the spur is obliquely inclined and does not press against the material being sewn, and therefore permits dependable ruffling of an upper layer of sewing material with respect to a lower layer of sewing material. At the start and at the end of the feed phase, the spur is vertically directed and presses against the sewing material, and thus smooth tension-ruffle-free sewing together, particularly of thin material, is made possible.
    Type: Grant
    Filed: September 23, 1991
    Date of Patent: April 13, 1993
    Assignee: Durkopp Adler Aktiengesellschaft
    Inventors: Michael Rosemann, Kurt Biermann
  • Patent number: 5189973
    Abstract: The bobbin case which is received by the looper has an upstanding generally cylindrical wall which surrounds the looper-thread bobbin. Forming part of the wall is a free-standing finger against which an end of a leaf spring rests. The looper thread, which has been withdrawn from the looper-thread bobbin and wrapped around the finger, is pulled through the constricted place between the leaf spring and the finger and then conducted through a threading slot provided by a radially-extending cam on the outer surface of the wall. The looper thread then comes against an inclined, downward-facing shoulder provided on the outside of the wall, slides down the shoulder, and passes finally into a long horizontal slot in the wall. The looper thread exits the bobbin case at an end point of the horizontal slot for being dependably caught by a thread catcher of a thread-cutting device.
    Type: Grant
    Filed: March 22, 1991
    Date of Patent: March 2, 1993
    Assignee: Durkopp Adler Aktiengesellschaft
    Inventors: Thomas Krumme, Robert Strohl, Dieter Wachter
  • Patent number: 5188044
    Abstract: A second workpiece, for instance a pocket blank, is placed with its edge regions protruding on at least three sides, on a folding device which forms part of the automatic sewing machine. The folding device has a swingable outer frame which has a plurality of inwardly and outwardly moveable bend-over devices with Z-shaped angles which fold the protruding edge regions around a so-called "sword". Thereupon, the folded second material is placed on a first workpiece which is present in a receiving station. Then the folded edge regions are continuously fixed over their entire length by a holding element which is embedded in an insert plate provided within the receiving station. The holding element permits the bend-over devices to move back away from the workpieces into their starting position, without carrying the folded edge regions along with them and thereby unfolding the folded edge regions.
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: February 23, 1993
    Assignee: Durkopp Adler Aktiengesellschaft
    Inventor: Joachim Brockmann
  • Patent number: 5158272
    Abstract: A work table for an automatic cutting installation for cutting materials by means of non-mechanical cutting tools has a metallic cutting base which is formed of a plurality of metal strips. Edges of the metal strips form the support surface for the workpiece. Undulating metal strips may be arranged alternately against non-undulating metal strips. Alternatively, metal strips may be used that are bent into the form of a rectangular undulation and have undulation valleys and undulation ridges which are of different length. The undulation valleys and undulation ridges lie in each case opposite each other and offset, forming a corner-shaped space. The metal strips extend over the complete width of the work table and their top-to-bottom width is selected to provide sufficient stability for the material to be cut which rests thereon. Portions of the metal strips are bonded or soldered to each other.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: October 27, 1992
    Assignee: Durkopp Adler AG
    Inventors: Klaus Biervert, Wolfgang Bruder, Gerd Kupper, Gerald Hess
  • Patent number: 5156103
    Abstract: An eyelet buttonhole sewing machine has a suction device between the throat plate and the wedge-shaped knife of the buttonhole cutting device. The suction device includes a suction tube and is connected to a vacuum generator, for instance an ejector nozzle or a transvector nozzle. The looper thread is brought near the suction device by a thread puller. When the looper thread is cut by the thread cutting device at the end of the sewing process, suction is applied to the suction tube, pulling the end of the looper thread into the opening of the suction tube. In this way, the looper-thread end assumes a well defined position in which it is disposed for being completely covered by the corresponding welt of the following buttonhole to be sewn. With the suction device and thread puller operating as described, it is no longer necessary to clean the buttonhole by cutting off the end of the looper thread.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: October 20, 1992
    Assignee: Durkopp Adler Aktiengesellschaft
    Inventors: Karl-Heinz Buschmann, Eberhard Kastrup
  • Patent number: 5154590
    Abstract: A rotatably mounted needle plate (30) in the form of a cylindrical sleeve is provided for a sewing machine (1) with which seams can be produced as a result of a relative movement between the sewing machine (1) and a cloth holder (68). The needle plate (30) has at least one needle-plate attachment (37) and at least two needle holes (38, 38'), a longitudinal axis (39) of each needle hole (38, 38') being radial to an axis of rotation (40) of the needle plate (30). The needle-plate attachment (37) provides cloth resting surfaces (41) surrounding each needle hole (38, 38') which are at different distances from the axis of rotation (40). By rotating the needle plate (30) there is obtained an adjustment of the sewing level, as a result of which it is assured that the lower side of the cloth will dependably rest on the cloth resting surfaces (41) during the sewing even when the cloth has partially thick regions within the course of the seam.
    Type: Grant
    Filed: October 23, 1991
    Date of Patent: October 13, 1992
    Assignee: Durkopp Adler Aktiengesellschaft
    Inventor: Michael Klein
  • Patent number: 5146821
    Abstract: A method for cutting blanks from webs of material, including some extra-long blanks which are longer than the cutting table. The extra-long blanks are only partially cut out in a first cutting step. Then, after further advance of the web onto the cutting table, the extra-long blanks are separated completely from the web.
    Type: Grant
    Filed: November 27, 1990
    Date of Patent: September 15, 1992
    Assignee: Durkopp Adler AG
    Inventors: Wolfgang Bruder, Klaus Biervert, Jurgen Meybrink
  • Patent number: 5127348
    Abstract: A sewing-material workpiece holder for holding and positioning the sewing part. The workpiece holder is movable in the longitudinal direction of the sewing-machine arm and also in a direction transverse thereto. The holder is connected in form-locked manner via a toothed drive to a carrier. The toothed drive includes a toothed drive member mounted on the carrier, and a rack which is mounted on the sewing-material holder, the rack being in engagement with the toothed drive member when the workpiece holder is mounted on the carrier. The drive member is driven by at least one motor. The holder is locked to the carrier by a guide block or clamp which is swingably mounted on the carrier and swingable into a lower, locking position. A predetermined positional association of the sewing-material holder with the carrier is made possible by an alignment device on the carrier.
    Type: Grant
    Filed: November 16, 1990
    Date of Patent: July 7, 1992
    Assignee: Durkopp Adler Aktiengesellschaft
    Inventors: Hans Scholl, Horst Bernewasser
  • Patent number: 5120952
    Abstract: In a device for ascertaining the actual feed transmittted by an feed device f an industrial sewing machine to a material to be sewn, in which the number of the threads moved across a sensor arrangement is counted and the feed is calculated from the previously detected thread density, it is provided, for obtaining an exact thread count which is as independent as possible of the orientation of the sewn web, to place ahead of the photocell (10) of the sensor arrangement a rotating slit diaphragm (7) with at least one radially extending parallel limited slit (8). Preferably a second, rotationally adjustable, but fixed slit diaphragm (5) is provided, having slits (6) opening across a set angular sector, the rotatitng slit diaphragm (7) having a larger number of slits (8). Because of this the required rpm of the slit diaphragm (7) can be reduced. To avoid errors caused by the pattern of the material it is possible to operate in the relatively longer wave infrared spectrum.
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: June 9, 1992
    Assignee: Durkopp Adler Aktiengesellschaft and PFAFF Industriemaschinen GmbH
    Inventors: Heribert Geisselmann, Manfred Frank
  • Patent number: 5113998
    Abstract: The present invention relates to a hanging device for supporting a hanger on a suspended conveyor, on which articles of clothing may be hung. The hanging device includes a base body; a flap which is pivotally mounted on the base body for pivoting about an axis perpendicular to the direction of transport; the flap having an open position and a closed position; and an arrangement for locating the hook of the clothes hanger on a portion of the base body, resting against the flap, with the flap in its closed position. These and other features of the hanging device provide dependable loading, transport and delivery of the clothes hangers under all circumstances.
    Type: Grant
    Filed: March 15, 1990
    Date of Patent: May 19, 1992
    Assignee: Durkopp Adler AG
    Inventors: Erwin Grube, Walter Kuhlmann, Ralf Schneuing
  • Patent number: 5090342
    Abstract: A sewing machine has a sewing head with a rotary housing, in which a needle bar is arranged, which is slidably supported. A 1st partial transmission unit and a 2nd partial transmission unit are provided as a drive and have a total transmitting ratio of 1. In order to make the moment of inertia of the rotary housing as small as possible, the transmitting ratio of the 1st partial transmission unit is smaller than 1 and the transmitting ratio of the 2nd partial transmission unit is correspondingly larger than 1.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: February 25, 1992
    Assignee: Durkopp Adler Aktiengesellschaft
    Inventor: Robert F. I. Conte
  • Patent number: 5085158
    Abstract: A sewing machine, having a device for centrally cutting a piping strip at both of its ends. At least one knife is arranged in a piping strip gripper between the parallel rows of oblique gripping needles. Before the start of the sewing process, a piping strip which has been placed at a predetermined position on a resting plate is held clamped between said plate and the gripper, which is lowered onto the resting plate. By actuation of the knife by an external force such as a pressure fluid, a blade of the knife penetrates into the piping strip and, by horizontal displacement of the knife, the piping strip is incised centrally at its end. Preferably there is a blade for each end of the piping strip.
    Type: Grant
    Filed: March 9, 1990
    Date of Patent: February 4, 1992
    Assignee: Durkopp Adler A.G.
    Inventors: Heinz Goldbeck, Werner Meyer
  • Patent number: 5082107
    Abstract: A storage conveyor which has a loading point and a removal point and in which a removal device is arranged preceding (upstream from) the removal point. The removal device includes a separately driven removal belt which is arranged between the two major courses of the horizontally circulating conveyor chain. The removal belt is guided so that it passes from below the conveyor chain to above it. The hanger hooks which rest with their top region on the conveyor chain are engaged at their tip by the removal belt, lifted off the conveyor chain and transferred to a slide rail at the removal point which they engage at their top region, and along which they then slide under the action of gravity. The removal belt can be moved faster than the conveyor chain, so as to separate the hangers as they are being lifted off the conveyor chain. As a result of these features of the storage conveyor, it is possible to supply and remove the hangers in a straight line so that high throughput is possible.
    Type: Grant
    Filed: August 29, 1990
    Date of Patent: January 21, 1992
    Assignee: Durkopp Adler Aktiengesellschaft
    Inventors: Erwin Grube, Walter Kuhlmann, Friedhelm Elges