Presser Devices Patents (Class 112/235)
  • Patent number: 4508043
    Abstract: A presser foot device on a sewing machine has a swingingly driven foot which can be shifted by two compressed air cylinders and piston combination and a spring mechanism into an inoperative position and, for adaptation to different work thicknesses, into a plurality of operating ranges, each with a different height position but constant amplitude of oscillation.
    Type: Grant
    Filed: November 9, 1983
    Date of Patent: April 2, 1985
    Assignee: Pfaff Industriemaschinen GmbH
    Inventor: Kurt Vollmar
  • Patent number: 4494471
    Abstract: A presser foot with a grooved sole plate for use in the formation of buttonholes on a sewing machine is pivotally mounted on a screw with which the foot can be moved laterally relative to the shank to position a groove dividing ridge with respect to a sewing needle.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: January 22, 1985
    Assignee: The Singer Company
    Inventor: Thaddeus J. Zylbert
  • Patent number: 4487145
    Abstract: A sewing machine includes a presser foot which is driven on a main shaft by an eccentric drive which drives through a toggle mechanism to a crank lever driver which effects the raising of the presser foot synchronously with the upward movement of a sewing machine needle so as to release a workpiece for movement relative to the needle. The presser foot is biased downwardly by a spring which may be adjusted as to its tension. During a sewing operation a driver is moved to a position only slightly disengaged from the lifting surface of the presser foot and during periods of engagement of the presser foot with the workpiece the toggle mechanism ensures that the presser foot engages the workpiece gently, irrespective of the adjusted amount of total lift of the presser foot by the drive mechanism.
    Type: Grant
    Filed: July 30, 1982
    Date of Patent: December 11, 1984
    Assignee: Pfaff Industriemaschinen GmbH
    Inventor: Kurt Vollmar
  • Patent number: 4473019
    Abstract: For a hem stitching operation with a sewing machine having a needle vertically reciprocating and also laterally swingable, a hem stitching presser foot is detachably mounted to a lower end of a presser bar of the sewing machine. The presser foot includes a brush like element which confronts a needle dropping hole formed in a sole of the presser foot, a frictional contact between the needle and the brush like element is produced when the needle passes the outside of the fabric edge, without penetrating the fabric, to stitch a portion of hem stitches on the outside of the fabric edge. The brush like element may be secured to the sole of the presser foot, or alternatively to a fabric guide member for engaging and guiding the fabric edge. The brush may be projected in the fabric feeding direction or across the fabric feeding direction. A pin may be located just beneath the brush like element for constant placement thereof.
    Type: Grant
    Filed: October 20, 1982
    Date of Patent: September 25, 1984
    Assignee: Janome Sewing Machine Industry Co., Ltd.
    Inventors: Susumu Hanyu, Kazumasa Hara, Akio Koide, Mikio Koike
  • Patent number: 4467739
    Abstract: A sewing machine for making edge-parallel shaping seams in multiple layer articles such as shirt collars comprises a reciprocating needle for sewing through the multiple layers of a workpiece such as a collar which has a plurality of edges disposed at angles to each other. The construction includes a guide fence having a guide edge extending alongside the needle. The material is guided against the guide edge. A feeder engages the workpiece from below a presser foot which is biased against the needle in a working position. The presser foot has an upwardly extending infeed end and a holddown member in the form of a strip element. It is adjustably supported above the workpiece and includes a front edge which is engaged downwardly on the workpiece and extends into the infeed end of the presser foot.
    Type: Grant
    Filed: December 28, 1982
    Date of Patent: August 28, 1984
    Assignee: Pfaff Industriemaschinen GmbH
    Inventors: Walter Hager, Kurt Petry
  • Patent number: 4459928
    Abstract: A fabric presser foot containing a member for guiding the hem of a fabric and a thread guide member disposed externally to the hem guide member and parallel to the fabric feed direction. Hemming is accomplished with the presser foot by forming a series stitch and a stitch for the subsequent stitching cycle. The series stitch contains at least two stitches formed on the fabric. Also formed is a stitch at the fabric hem, and a stitch formed externally to the thread guide member which is disposed on the fabric presser foot. The presser foot is attached to the head of the zigzag sewing machine which forms lock stitches using an upper and lower thread.
    Type: Grant
    Filed: June 29, 1982
    Date of Patent: July 17, 1984
    Assignee: Janome Sewing Machine Co. Ltd.
    Inventor: Yasukata Eguchi
  • Patent number: 4452158
    Abstract: A low-inertia presser device for sewing machines having a coil spring operatively connected to a pivotably mounted arm that carries the machine's presser foot. The spring is housed within a sleeve having a bifurcated end that straddles the arm. A thrust rod protruding from the sleeve has one end in engagement with the coil spring and the opposite end with that portion of the pivotably mounted arm extending through the bifurcated end of the sleeve. The biasing force of the coil spring is effective in minimizing the inertia of the moving parts and is effective in causing the presser foot to precisely and consistently track the movement of the feed dog above the needle plate, resulting in controlled movement of a workpiece in a straight line along the sewing axis.
    Type: Grant
    Filed: April 30, 1982
    Date of Patent: June 5, 1984
    Assignee: Rockwell-Rimoldi S.p.A.
    Inventors: Giovanni De Palma, Bruno Motta
  • Patent number: 4444141
    Abstract: A position indictor for an industrial sewing machine, particularly a programmable industrial sewing machine, in which an elongate slender member may be selectively extended through a tubular conduit to have an end of the member adjacent the work supporting bed so as to indicate to an operator the starting position for a work material from which stitching may initiate. The elongate slender member, which is best implemented by a wire, may also be used as an edge guide or a pivot point. Extension of the member through the flexible conduit may be initiated by an air cylinder or solenoid, and may be initiated by program control to take place when the sewing needle and the sewing machine presser foot are elevated.
    Type: Grant
    Filed: May 11, 1982
    Date of Patent: April 24, 1984
    Assignee: The Singer Company
    Inventor: David Forrest
  • Patent number: 4434817
    Abstract: The edge yarn clamp for a weft yarn is provided with a push-on resilient shoe on the metal clamping jaw. The resilient shoe includes a curved clamping cap on a rearward part to reliably retain the shoe in place while permitting an ease of fitting-on.
    Type: Grant
    Filed: December 29, 1981
    Date of Patent: March 6, 1984
    Assignee: Sulzer Brothers Ltd.
    Inventor: Walter Gruber
  • Patent number: 4432294
    Abstract: A presser foot assembly is mounted to a sewing machine and includes a bifurcated skid for mounting to the sewing machine in alignment with and projecting in front of the sewing station and a wheel mounted on the skid which is biased downwardly through the slot of the tines of the skid into yielding contract with the material extending through the sewing station. When a tape feed apparatus is moved to a position in front of and aligned with the wheel and the sewing station, the tape moves with the base material beneath the wheel and through the sewing station where it is sewn to the base material. When the tape feed apparatus is moved out of alignment with the wheel and sewing station, the tape no longer moves beneath the wheel and to the sewing station.
    Type: Grant
    Filed: May 15, 1981
    Date of Patent: February 21, 1984
    Assignee: Atlanta Attachment Company
    Inventors: Elvin C. Price, Preston B. Dasher
  • Patent number: 4423691
    Abstract: A device for monitoring the passage of workpiece ends through a sewing machine. The device includes a photosensitive receiver connected to one end of a fiber optic cable. The other end of the cable being arranged opposite a reflecting surface and carried by the sewing machine presser foot in a manner preventing the exposed end face thereof from being defiled.
    Type: Grant
    Filed: November 1, 1982
    Date of Patent: January 3, 1984
    Assignee: Union Special GmbH
    Inventor: Konstantin Schwaab
  • Patent number: 4417533
    Abstract: A work presser device wherein a constant-force spring is employed for urging a presser bar downwardly, with substantially constant pressure, against a work piece. This constant pressure is exerted regardless of the axial movement of the presser bar owing to variation of the thickness of the work piece in the course of a sewing operation.
    Type: Grant
    Filed: January 12, 1981
    Date of Patent: November 29, 1983
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Nobuyasu Oshima, Tetsuya Tsumura
  • Patent number: 4411211
    Abstract: A method of and a sewing machine for affixing a continuous chain of coupling members for a slide fastener to a flexible support, e.g. a garment or a tape to be applied to a garment, utilizes a fabric fed by a mechanism below the worktable and a presser foot with a feeder above the worktable which advances the coupling chain in a composite movement including up-and-down and back-and-forth components. According to the invention, at least one of the drives is adjustable so that the increment of the displacement of the respective member (fabric or coupling chain) can be varied to ensure that the two members are stitched together free from undulations or corrugations after the stitching operation or any subsequent treatment to which the product may be subjected.
    Type: Grant
    Filed: October 22, 1981
    Date of Patent: October 25, 1983
    Assignee: Optilon W. Erich Heilmann GmbH
    Inventor: Halmut Heimberger
  • Patent number: 4381722
    Abstract: In a sewing machine having a presser foot and a pressure imparting member for applying a downward pressure to the presser foot, there is disposed, in an inner chamber of a frame, an oil pump drivingly connected to a main shaft. The oil pump having an inlet port for drawing the oil from an oil reservoir and an outlet port for deliverying the oil under the pressure corresponding to the speed of the main shaft. Also a presser actuating device is provided between the oil pump and the presser foot and designed to apply an additional downward pressure to the presser foot by means of the oil from the outlet port so as to increase the downward pressure of the presser foot.
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: May 3, 1983
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Toshikatu Takeuchi, Kihei Goto, Yasuro Ichihashi, Takenori Kawase
  • Patent number: 4372236
    Abstract: A thread cutting device for a sewing machine that will cut threads in a scissor-like action. The device is mounted on a sewing machine pressure arm and can be manually operated. The device comprises a stationary horizontal cutting blade; a pivoting cutting blade is attached to the stationary blade so as to form a cutting field and a finger pressure assembly, having a tensioning means, creates a scissor-like action in the cutting field.
    Type: Grant
    Filed: October 7, 1981
    Date of Patent: February 8, 1983
    Assignee: Interco Incorporated
    Inventor: William E. Harrison
  • Patent number: 4372233
    Abstract: A zig zag sewing machine, wherein a needle bar having a basting position beyond its zig zagging range, is provided with a presser foot having therein an elongate opening which is defined to permit one needle of a twin needle device to pass therethrough without striking the foot upon descent of the needle bar of the machine from a basting position, and which has a beveled edge to interfere at one end of the opening with the other needle and deflect such other needle so that it can pass through the opening.
    Type: Grant
    Filed: February 12, 1981
    Date of Patent: February 8, 1983
    Assignee: The Singer Company
    Inventor: Charles R. Odermann
  • Patent number: 4363280
    Abstract: Sewing machine attachment comprises a substantially horizontally extending positioning member having an open cavity therein, at least a portion of the cavity walls defining a seat for a magnetizable accessory and magnetic means within the positioning member for producing a magnetic flux which extends from the seat through the opening to the cavity for attracting the accessory. At least a portion of one wall of the cavity, preferably the bottom wall, is removably mounted on the positioning member.
    Type: Grant
    Filed: August 11, 1980
    Date of Patent: December 14, 1982
    Assignee: Pennsylvania Sewing Research Corp.
    Inventor: Carl Lindquist
  • Patent number: 4344375
    Abstract: A sewing machine for sewing workpieces, comprises a stationary bottom part with an arm which has one end pivotally mounted on the bottom part and an opposite end overlying the bottom part. The arm is movable from a fixed sewing position to an inoperable position away from the point of stitch formation. A revolving looper is mounted on the end of the opposite arm and it has a thread exit opening and a needle is mounted for upward and downward movement in the bottom part for cooperation with the looper. The workpiece is clamped between the base part and the arm and the needle traverses the workpiece upwardly. The construction includes a looper thread guide member mounted on the opposite arm adjacent the looper and has a thread deflector located between the needle path and the thread exit opening of the looper and extending above the point of stitch formation directly laterally of the needle path crosswise to the axis of the looper.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: August 17, 1982
    Assignee: Pfaff Industriemaschinen GmbH
    Inventor: Gunter Tolle
  • Patent number: 4328758
    Abstract: An apparatus and method in which loose thread ends are drawn by air flow into a tube adjacent the needle of a sewing machine, at least between sewing operations.
    Type: Grant
    Filed: September 17, 1979
    Date of Patent: May 11, 1982
    Assignee: Clevepak Corporation
    Inventors: Ronald Souza, Owen F. Dunne
  • Patent number: 4321880
    Abstract: The present invention is directed to a presser foot attachment adapted for use with a sewing machine for stitching an upper material to a base material and simultaneously trimming the edge of the base material along a line closely adjacent the row of stitches. The presser foot attachment includes a main section and an auxiliary section. The main section of the foot terminates just forward of the sewing machine needle so as to allow the juxtaposed edges of the upper and lower materials to be placed in close proximity to the needle at the onset of the sewing operation. The auxiliary section is movable between two positions and aids in guiding and separating the upper material over the base material and to the sewing station of the machine.
    Type: Grant
    Filed: May 8, 1980
    Date of Patent: March 30, 1982
    Assignee: Union Special Corporation
    Inventor: Ronald J. Boser
  • Patent number: 4318358
    Abstract: A presser foot assembly of a sewing machine, comprising a presser foot member having a bottom rib and a bottom surface both extending in fore-and-aft directions of the presser foot member and a flexible annular band fitted to the presser foot member in such a manner that the inner peripheral surface of the annular band is circumferentially slidable in a fore-and-aft direction of the presser foot member, wherein one of the presser foot member and the annular band is formed with a groove and the other thereof is formed with a projection slidable through the groove for maintaining the slidable engagement between the presser foot member and the annular band.
    Type: Grant
    Filed: October 26, 1979
    Date of Patent: March 9, 1982
    Inventor: Kenichi Iwamoto
  • Patent number: 4289084
    Abstract: A sewing machine can accept a plurality of presser feet for specific stitching applications. The invention adjusts lateral movement of the needle, feed dog operation, and needle hole size at the needle plate to conform with the presser foot used, and to thereby prevent needle breakage and skipped stitches.
    Type: Grant
    Filed: June 14, 1979
    Date of Patent: September 15, 1981
    Assignee: Janome Sewing Machine Co., Ltd.
    Inventors: Hideaki Takenoya, Yoshinobu Tonomura
  • Patent number: 4280422
    Abstract: A guide device for a sewing machine, having a needle for sewing a stitch line in a sewing direction and a presser bar, for sewing together fabric plies of unequal thickness, comprises, a main sole part, with a stitch hole for the passage of the needle, connected to the presser bar, an auxiliary sole part connected to the presser bar having a first fold plate positioned upstream of the stitch hole in the sewing direction, and a second fold plate connected to the sewing machine and spaced at least one fabric thickness above the first fold plate. The first fold plate includes a guide edge extending laterally beyond the stitch line on one side thereof and the second fold plate has a guide edge extending laterally beyond the stitch line on an opposite side thereof, whereby, the first and second fold plates define a guide channel therebetween for forming and guiding an S-shape fold in the fabric.
    Type: Grant
    Filed: September 19, 1980
    Date of Patent: July 28, 1981
    Assignee: Pfaff Industriemaschinen GmbH
    Inventor: Arno Jung
  • Patent number: 4276842
    Abstract: A regulating device for the upper wheel type workpiece transport mechanism in sewing machines. The transport wheel is rotatably driven and carried by a tubular support pivotably mounted on the machine. An eccentric roller having an indicating arm extending therefrom is in operative contact with the tubular support and with one end of the indicating arm disposed in operative association with a graduated scale defined by a plurality of stops for selectively locating the indicating arm. By moving the latter to any one of the stops, the eccentric roller is effective in changing the operating position of the transport wheel so that it can accommodate workpieces which vary in thickness and with generally the same amount of pressure being applied to each workpiece.
    Type: Grant
    Filed: November 16, 1979
    Date of Patent: July 7, 1981
    Assignee: Rockwell-Rimoldi, S.p.A.
    Inventor: Giancarlo D. Torre
  • Patent number: 4274350
    Abstract: The attachment is primarily used as a replacement for the conventional presser foot typically employed on an industrial sewing machine, and is in particular useful when stitching multiple layer fabrics having synthetic backings. The attachment is for pressing the fabric being stitched against parallel arranged feed dogs and includes a wheel assembly frame supported from one end of a presser arm which is, in turn, pivotally supported at its other end from the machine. The wheel assembly supports a wheel mounted for rotation about a substantially horizontal axis and preferably of a yieldable rubber or rubber-like material that overlies one of the feed dogs of the sewing machine, and a presser foot mounted beside the wheel having a lower pressing surface and overlying a second feed dog of the sewing machine.
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: June 23, 1981
    Assignee: Beatrice Foods Company
    Inventors: Merrill H. Walter, Stanley Jacobs
  • Patent number: 4274347
    Abstract: An apparatus for sewing a slide fastener chain to a pair of article panels separates the chain into separate stringers which are sewn to the article panels with the fastening elements facing outward. The slide fastener stringers are twisted and the inner edges of the attached article panels are folded and the stringers are reinterlocked by a turning and pull-up device through which the slide fastener stringers with attached article panels are pulled by a pulling mechanism.
    Type: Grant
    Filed: August 18, 1980
    Date of Patent: June 23, 1981
    Assignee: Textron, Inc.
    Inventor: Robert L. Rohrer
  • Patent number: 4269128
    Abstract: This invention relates to a presser mechanism for sewing machines which includes a pair of independently tandemly mounted presser foot soles arranged to cooperate with the feed mechanism of the machine in advancing the workpiece along a directed path of travel. Different selectively variable pressures may be applied to the presser foot soles such that both a firm heavy pressure and a resilient lesser pressure is applied to the workpiece as it travels along its directed path of travel.
    Type: Grant
    Filed: January 10, 1979
    Date of Patent: May 26, 1981
    Assignee: Union Special Corporation
    Inventors: Ronald J. Boser, Henry J. Watts
  • Patent number: 4244312
    Abstract: A tailor tacking device attachable to the presser bar of a zig-zag sewing machine is provided with an elongated member to support the loops of zig-zag stitches and move from an elevated to a depressed position during downward movement of a needle bar to avoid having the supporting member interfere at such time with the needle of the machine.
    Type: Grant
    Filed: March 21, 1980
    Date of Patent: January 13, 1981
    Assignee: The Singer Company
    Inventor: Edward Bialy
  • Patent number: 4214540
    Abstract: A sewing machine having a presser bar operated by a lever having a movable fulcrum to vary the mechanical advantage of the lever and thereby vary the effective pressure on the presser bar.
    Type: Grant
    Filed: May 30, 1979
    Date of Patent: July 29, 1980
    Assignee: The Singer Company
    Inventor: Albert N. Cook
  • Patent number: 4202285
    Abstract: A presser foot adapted to be attached to a sewing machine for sewing a concealed type of sliding clasp fastener to a garment fabric or the like, the foot having in its sole or bottom surface a pair of spaced guide grooves. A substantially V-shaped partition is disposed longitudinally centrally of the foot and separates the guide grooves. This partition has an integral projection extending downwardly to register with the bottom surface of the foot and laterally beyond both sides of the partition whereby the folded edge of the concealed fastener is retained in unfolded disposition at the initial stage of sewing operation.
    Type: Grant
    Filed: September 11, 1978
    Date of Patent: May 13, 1980
    Assignee: Yoshida-Kogyo K.K.
    Inventor: Yoshihiro Kanzaka
  • Patent number: 4197803
    Abstract: An improved visual aid mechanism for a presser device for facilitating the making of buttonholes. The mechanism will sense and indicate to the operator the approaching end of the first leg of a buttonhole being sewn whose length has been preset by the operator. This invention utilizes flexible fingers which are substantially deflected by an adjustable stop member to provide a magnified visual indication. Thus the operator may stop the sewing operation very precisely resulting in buttonholes of consistently uniform length and quality.
    Type: Grant
    Filed: April 30, 1979
    Date of Patent: April 15, 1980
    Assignee: The Singer Company
    Inventor: Walter H. W. Marsh
  • Patent number: 4186676
    Abstract: A method and apparatus for forming a continuous chain of stitches between pieces of material on a double needle sewing machine which includes a sensing device for detecting the presence of material in the sewing area and connected to the sensing device elements are provided for releasing the tension on one of the needle threads upon indication of absence of material in the sewing area. Additionally an auxiliary feed device functioning in cooperation with the machine's feed dog and needle plate is effective in simultaneously advancing the untensioned needle thread with the single chain of stitches being formed.
    Type: Grant
    Filed: April 3, 1978
    Date of Patent: February 5, 1980
    Assignee: Rockwell-Rimoldi, S.p.A.
    Inventors: Enrico Villa, Angelo Radice
  • Patent number: 4183311
    Abstract: A sewing machine presser device is provided with a sole plate and with a latching spring which can be snapped into a retaining notch at the front edge of a shank on the device to hold a hinge pin on the foot up in a recess at the bottom of the shank and which can be readily dislodged from said notch to enable easy removal of the sole plate from the machine.
    Type: Grant
    Filed: March 15, 1979
    Date of Patent: January 15, 1980
    Assignee: The Singer Company
    Inventor: Warren D. Knowles
  • Patent number: 4159001
    Abstract: A presser foot for a concealed slide fastener has a sole plate slidably supported on a stem, the sole plate having in its sole a pair of guide grooves extending along the length thereof. A first needle hole in the sole plate is located between the guide grooves and a second needle hole therein is located at one side of the sole plate. The sole is divided by the guide grooves into two portions, one of which is wider than the other, the second needle hole being provided in the wider sole portion. A throat plate of a sewing machine has a third needle hole and a pair of spaced slots one on each side of the third needle hole, the slots receiving a pair of feed dogs, respectively.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: June 26, 1979
    Assignee: Yoshida Kogyo K K
    Inventor: Hisashi Doori
  • Patent number: 4136626
    Abstract: A sewing machine presser foot includes a pin member pivotally supported in a pair of spaced lugs mounted on a sole member. The pin member has a strip between its journal ends, the strip extending through a groove provided through a stem member to be installed on a sewing machine bar. The groove has a cross-section of an ellipse having a pair of opposed walls across which the minor axis extends. The pin member is normally movable axiswise for its positional adjustment relative to the stem member. Upon pivotal movement of the pin member about its axis, edges of the strip come into frictional engagement with the walls of the groove, to thereby arrest axial movement of the pin member relative to the stem member. A slot is provided in the stem member, the slot being coextensive in length and communicating with the groove for the passage therethrough of the strip. One of the journal ends of the pin member has a knob or lever for rotation thereof.
    Type: Grant
    Filed: June 21, 1977
    Date of Patent: January 30, 1979
    Assignee: Yoshida Kogyo K K
    Inventors: Akiyoshi Kandou, Kiyoo Yoneya
  • Patent number: 4120253
    Abstract: A tubular loop forming tool for sewing machines replaces the normal presser foot attached to the sewing machine presser bar, thereby providing the function of the presser foot and also serving as a gauge to control the size of a tubular loop being sewn from fabric material, the gauge preferably being adjustable so various size tubular loops may be formed.
    Type: Grant
    Filed: April 15, 1977
    Date of Patent: October 17, 1978
    Inventor: Thomas O. Blair
  • Patent number: 4069780
    Abstract: A twin-needle sewing machine for stitching lap seams which have been produced by basting a pair of fastener stringers to the edges of an article bounding an opening therein and then by folding the article edges along the basting lines. The sewing machine has a presser foot comprising a pair of parallel spaced main portions, and a pair of wings projecting laterally outwardly from the respective main portions. A guide fixedly mounted on the throat plate of the sewing machine has its sloping rear surface disposed opposite to the front end of the presser foot. The folded article edges together with the stringers basted thereto follow a curved path created by the guide as they are drawn under the presser foot for final stitching of the lap seams, in order that the article edges may not unfold.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: January 24, 1978
    Assignee: Yoshida Kogyo Kabushiki Kaisha
    Inventor: Tadashi Minami
  • Patent number: 4060045
    Abstract: A pressure regulating module for a sewing machine, the module supporting a pressure regulating cam, and a cam follower mechanism for cooperative engagement with the cam, the cam follower mechanism having a laterally extending ear impressed with a spherical surface impinging against a platform on a plunger slidably received in a bore in a presser bar of the sewing machine, the plunger being in abutment with a compression spring also received in the bore. The spherical surface, plunger, compression spring and presser bar are in substantial alignment when the module is assembled to the sewing machine frame. The cam includes a darning position where little or no pressure is applied to the presser bar, by which assembly to the sewing machine frame may be facilitated.
    Type: Grant
    Filed: May 26, 1976
    Date of Patent: November 29, 1977
    Assignee: The Singer Company
    Inventors: Erwin Vahle, Arnold Hartig
  • Patent number: 4058071
    Abstract: A low inertia presser bar system for a sewing machine has a short hollow presser bar including a light internal compression spring with an abutment member on top engaged in a depression in the underside of an arm of a fulcrumed bell-crank lever. An upper presser bar having a heavy spring is linked to the upper side of the same arm of the lever. A stop member is threaded into the head of the sewing machine to engage the other arm of the bell-crank lever to oppose and thereby limit the force of the upper spring and isolate the lower spring and presser bar until the lower spring is compressed solid.
    Type: Grant
    Filed: December 22, 1976
    Date of Patent: November 15, 1977
    Assignee: The Singer Company
    Inventors: Earl F. Dunn, Henry Erskine, Edward Hooper
  • Patent number: 4056070
    Abstract: An automatic buttonholing device which uses a specially modified presser foot into which electrical contacts are inserted for actuating an electromechanical buttonholing assembly. The operator places small conductive markers on the fabric at the top and bottom of the desired buttonhole location. When the contacts on the presser foot ride over the markers, a circuit is completed and proper steps in the buttonholing sequence are initiated.
    Type: Grant
    Filed: October 15, 1976
    Date of Patent: November 1, 1977
    Assignee: The Singer Company
    Inventor: Robert Conrad Hauf
  • Patent number: 4024826
    Abstract: A constant pressure tension attachment for a sewing machine in which fluid means applies a predetermined constant force on a fabric guide means within the limits of fabric guide means displacement.
    Type: Grant
    Filed: August 22, 1975
    Date of Patent: May 24, 1977
    Assignee: Blue Bell, Inc.
    Inventors: Edward P. Knight, Watson Bailey
  • Patent number: 4018174
    Abstract: A sewing machine presser foot assembly adapted for the dual function of setting a concealed zipper and closing the seam below the zipper. The presser foot assembly comprises a zipper foot, and a cording foot bar pivotally mounted for selective movement between a raised inoperative position alongside the zipper foot and a lowered operative position beneath the zipper foot. In a preferred embodiment of the invention, means are provided for maintaining the cording foot bar in either the raised or the lowered position.
    Type: Grant
    Filed: January 23, 1976
    Date of Patent: April 19, 1977
    Assignee: Gordon Clothes, Inc.
    Inventors: Ernest A. DiBenedetto, Harold S. Lerner
  • Patent number: 4010701
    Abstract: An independent guide device is positionable on the supporting surface of the plate and in intermittent contact with the feeder of a sewing machine for guiding the needle of the machine in an irregular pattern. The guide device comprises a pair of complementary jig devices shaped to fit in juxtaposition with layers of material to be sewn to each other positioned between the jig devices. The jig devices have the same irregular configuration and complementary cross-sectional areas. Clamping devices releasably clamp the jig devices in juxtaposition with the material to be sewn positioned therebetween. Guide members extend from the foot device of the sewing machine for maintaining the guide device in a predetermined position relative to the needle of the machine while the guide device is moved between the foot device and the supporting surface of the feeder of the machine through the entire duration of the guide device.
    Type: Grant
    Filed: October 30, 1975
    Date of Patent: March 8, 1977
    Inventor: Raymond Helfont
  • Patent number: 3993009
    Abstract: A presser foot, for a sewing machine for use in sewing slide fasteners to garments, has a foot portion pivotally mounted on a vertically movable presser bar of the sewing machine, gripping members pivotally mounted on the foot portion and cooperating with the latter in forming guide grooves for receiving and guiding element rows secured to the slide fastener tapes, and a spring member fixed to the foot portion and engaging with the gripping members to normally bias the latter toward the foot portion in a direction to narrow the guide grooves.
    Type: Grant
    Filed: October 9, 1975
    Date of Patent: November 23, 1976
    Assignee: Yoshida Kogyo Kabushiki Kaisha
    Inventor: Tatsuo Osaki
  • Patent number: 3937159
    Abstract: Yarn clamping means for clamping yarn during a desired portion of the tufting cycle. Various biasing means and related structures are disclosed to effectively clamp the yarn while loaded in tufting needles, thus preventing dislodgement of the yarn by factors such as yarn severing or yarn thrust from pneumatic transport means.
    Type: Grant
    Filed: May 29, 1974
    Date of Patent: February 10, 1976
    Inventor: Abram N. Spanel
  • Patent number: 3933106
    Abstract: A low inertia presser device for overedge sewing machine. A horizontally disposed presser bar arm and a similarly disposed presser bar arm leaf spring are mutually pivoted at one end on substantially horizontal and vertical pivots to permit vertical movement and swing out capability. A main pressure spring acts on the presser bar arm; which in turn, through an arm extension to the presser bar arm approximately midway its pivoted end and the point of action of the main spring, applies pressure approximately midway along the presser bar arm leaf spring. A presser foot is supported on the end of the leaf spring opposite its pivoted end.
    Type: Grant
    Filed: October 31, 1974
    Date of Patent: January 20, 1976
    Assignee: The Singer Company
    Inventor: Ian S. Murray