US3859937A - Method of and apparatus for feeding a workpiece to a dart-forming sewing machine - Google Patents

Method of and apparatus for feeding a workpiece to a dart-forming sewing machine Download PDF

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Publication number
US3859937A
US3859937A US472991A US47299174A US3859937A US 3859937 A US3859937 A US 3859937A US 472991 A US472991 A US 472991A US 47299174 A US47299174 A US 47299174A US 3859937 A US3859937 A US 3859937A
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US
United States
Prior art keywords
workpiece
bed
aperture
sewing machine
station
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.)
Expired - Lifetime
Application number
US472991A
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English (en)
Inventor
Horst Fenzl
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.)
Duerkoppwerke GmbH
Original Assignee
Duerkoppwerke GmbH
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
Application filed by Duerkoppwerke GmbH filed Critical Duerkoppwerke GmbH
Application granted granted Critical
Publication of US3859937A publication Critical patent/US3859937A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B35/00—Work-feeding or -handling elements not otherwise provided for
    • D05B35/02—Work-feeding or -handling elements not otherwise provided for for facilitating seaming; Hem-turning elements; Hemmers
    • D05B35/04—Work-feeding or -handling elements not otherwise provided for for facilitating seaming; Hem-turning elements; Hemmers with movable tools
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2305/00—Operations on the work before or after sewing
    • D05D2305/02—Folding

Definitions

  • ABSTRACT A fabric workpiece is laid right side up on a Hat table adjacent and transverse to the bed of a dart-forming sewing machine. A predetermined location on the workpiece is positioned over an aparture in the table in line with the bed and a folding element comprising a row of needles projecting from a reciprocal bar is pushed against the workpiece at the aperture and through this aperture to form a fold in the workpiece and displace this fold to the stitching location of the sewing machine.
  • the table extends at an angle of approximately 75 to the bed of the sewing machine and is provided to each side of the aperture slot with an elastic lip formed by a coil spring that serves to guide and hold the fold.
  • the present invention relates to an apparatus for BACKGROUND OF THE INVENTION
  • a sewing machine in which the workpiece is fed past a sewing station between two surfaces which have a folding element displaceable toward the sewing station and serving to feed the workpiece in a folded condition between the guide surfaces of the sewing apparatus.
  • the fabric workpiece after being folded at the requisite place is fed to a driven advancing bar or element which transports this workpiece to the stitching station of the sewing machine so that a gusset or dart may be formed in the workpiece.
  • This apparatus comprises a displaceable base plate whose edge turned toward the advancing element constitutes a folding bar which in its starting position is overhung by an as yet unfolded workpiece.
  • This sewing apparatus does indeed aid in the production of garments having darts wherein the apparatus can be loaded automatically with prepared pieces.
  • the workpiece must be placed on the base plate and folding bar with the wrong side up so that its right side is not visible to the operator.
  • solid-color fabrics it is irrelevant where the dart is placed in the garment so that the fact that only the wrong side of the goods can be seen is irrelevant.
  • fabrics having patterns, prints or the like it is impossible to arrange the dart so that they fall at a place in the pattern where they will be least obvious.
  • Another object is to provide an apparatus for folding and feeding the fabric workpiece to the stitching station of a sewing machine.
  • Another object is an improved method of feeding a workpiece to the stitching station of a sewing machine.
  • the table is a slotted plate extending at an angle of between and 80 to the planar bed of the sewing machine.
  • This plate is provided adjacent the slot-forming aperture with a pair of elastic lips constituted by a single coil spring which serves to guide and hold the fold as it is pushed therethrough.
  • the folding element comprises a reciprocal bar and an array or row of parallel needles arranged on the bar directed toward the station.
  • FIG. 1 is a side sectional view of the apparatus according to this invention.
  • FIG. 2 is a view taken in the direction of arrow II of FIG. 1.
  • a folding bar 10 is dis placeable from a solid-line starting position to a dotdash line end position to form a fold in a workpiece 20.
  • This fold underlies a workpiece guide 21 which forms part of the feed bar of a sewing machine 50.
  • the folding element 10 comprises a flat bar or strip 11 on which is provided an array of parallel needles 12.
  • This bar II is carried on a pair of arms 15 pivoted on a support 43 and operated by the piston rod 14 of a pneumatic cylinder 13.
  • the needles 14 force a fold of the workpiece 20 between the bar 21 and the table 22 of the sewing machine 50 so as to allow the stitching needle 51 of this machine to form a line of stitching in the fold.
  • the advance bar 21 can be raised and lowered as shown by arrow A at right angles to the plane of movement of the folding element 10 so as to be able to clamp the fold snugly against the surface 22.
  • the support plate 40 extends at an angle of approximately to the surface 22.
  • This plate 40 is planar and formed with a slot 41 provided on each side with lip-forming springs 42 formed as a single loop of a coil spring so that the fold pushed through the slot 41 is held between these lips 42.
  • a marking lamp is provided which directs a beam of light directly at the slot 41 at the position where the needles 12 will engage and fold the fabric workpiece 20.
  • the workpiece is held on the table 40 in such a manner that the position where the dart is to be formed lies exactly at the beam of light from the lamp 30.
  • the cylinder 13 is actuated to form the fold and the dart is stitched in a manner known per se. Since the goods 20 are arranged with their right side 23 out it is possible to position the dart within the pattern at an inconspicuous location.
  • the folding element 10 can be withdrawn. An experienced worker can therefore form darts in fabric workpieces in just several seconds, orienting them perfectly.
  • An operating pedal 18 is provided connected to the cylinder 13 for advancing the needles 12 into the fold slowly so as to position this fold under the holding bar 21 and to withdraw it rapidly.
  • the supports 43 are mounted on an arm 44 pivotal about a vertical axis A so as to allow the entire fold-forming assembly to be displaced out of the way.
  • FIGS. 1 and 2 Although the surface 40 illustrated in FIGS. 1 and 2 is shown to be upright or substantially vertical it is possible to have this table perfectly horizontal and provide the sewing machine 40 underneath it with the surface 22 vertical.
  • a method of feeding a workpiece to the stitching station of a sewing machine having a flatbed under said station comprising the steps of:
  • said folding element comprises a reciprocal bar and an array of parallel needles arranged in a row on said bar and directed toward said station.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US472991A 1973-05-25 1974-05-24 Method of and apparatus for feeding a workpiece to a dart-forming sewing machine Expired - Lifetime US3859937A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2326683A DE2326683C3 (de) 1973-05-25 1973-05-25 Vorrichtung zum Einbringen eines Zuschnittelles in einen Nähautomaten

Publications (1)

Publication Number Publication Date
US3859937A true US3859937A (en) 1975-01-14

Family

ID=5882132

Family Applications (1)

Application Number Title Priority Date Filing Date
US472991A Expired - Lifetime US3859937A (en) 1973-05-25 1974-05-24 Method of and apparatus for feeding a workpiece to a dart-forming sewing machine

Country Status (6)

Country Link
US (1) US3859937A (enrdf_load_stackoverflow)
JP (1) JPS5646879B2 (enrdf_load_stackoverflow)
DE (1) DE2326683C3 (enrdf_load_stackoverflow)
FR (1) FR2230774A1 (enrdf_load_stackoverflow)
GB (1) GB1441723A (enrdf_load_stackoverflow)
IT (1) IT1012717B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2549504A1 (fr) * 1983-07-19 1985-01-25 Draper Lab Charles S Systeme pour assembler par couture des parties d'une bande de tissu
EP0070881A4 (en) * 1981-02-04 1985-10-01 Draper Lab Charles S SYSTEM AND METHOD FOR MANUFACTURING SEWED ARTICLES.
FR2565263A1 (fr) * 1984-06-04 1985-12-06 Reece Corp Machine pour la confection d'une structure de braguette dans un pan de vetement
FR2594013A1 (fr) * 1986-02-12 1987-08-14 Absorba Poron Dispositif pour positionner une etiquette a coudre sur un article textile.
US4694767A (en) * 1985-11-07 1987-09-22 Beisler Gmbh Device for transferring a fabric strip from a deposit station

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2705279C2 (de) * 1977-02-09 1983-09-22 Dürkoppwerke GmbH, 4800 Bielefeld Falt- und Positioniervorrichtung
JPS57135329A (en) * 1981-02-16 1982-08-20 Masaki Yamamoto Polarization analyzing device
US4425858A (en) * 1982-02-26 1984-01-17 Amf Incorporated Means for processing sheets of material
DE4118179A1 (de) * 1991-06-03 1992-12-10 Pfaff Ag G M Vorrichtung zum eingeben und falten von naehgut an einem abnaeher-naehautomaten

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381640A (en) * 1966-03-07 1968-05-07 Davidson Mats Ingvar Apparatus for applying ribbons at slits of clothings
US3773002A (en) * 1971-12-29 1973-11-20 P Burton Method and apparatus for folding and sewing hems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381640A (en) * 1966-03-07 1968-05-07 Davidson Mats Ingvar Apparatus for applying ribbons at slits of clothings
US3773002A (en) * 1971-12-29 1973-11-20 P Burton Method and apparatus for folding and sewing hems

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0070881A4 (en) * 1981-02-04 1985-10-01 Draper Lab Charles S SYSTEM AND METHOD FOR MANUFACTURING SEWED ARTICLES.
FR2549504A1 (fr) * 1983-07-19 1985-01-25 Draper Lab Charles S Systeme pour assembler par couture des parties d'une bande de tissu
FR2565263A1 (fr) * 1984-06-04 1985-12-06 Reece Corp Machine pour la confection d'une structure de braguette dans un pan de vetement
US4694767A (en) * 1985-11-07 1987-09-22 Beisler Gmbh Device for transferring a fabric strip from a deposit station
FR2594013A1 (fr) * 1986-02-12 1987-08-14 Absorba Poron Dispositif pour positionner une etiquette a coudre sur un article textile.

Also Published As

Publication number Publication date
DE2326683A1 (de) 1974-12-12
FR2230774A1 (enrdf_load_stackoverflow) 1974-12-20
DE2326683B2 (de) 1975-03-27
IT1012717B (it) 1977-03-10
DE2326683C3 (de) 1975-11-13
GB1441723A (en) 1976-07-07
JPS5036257A (enrdf_load_stackoverflow) 1975-04-05
JPS5646879B2 (enrdf_load_stackoverflow) 1981-11-06

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