US3025811A - Thread-chain holding and cutting device for sewing machines - Google Patents

Thread-chain holding and cutting device for sewing machines Download PDF

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Publication number
US3025811A
US3025811A US6232A US623260A US3025811A US 3025811 A US3025811 A US 3025811A US 6232 A US6232 A US 6232A US 623260 A US623260 A US 623260A US 3025811 A US3025811 A US 3025811A
Authority
US
United States
Prior art keywords
thread
chain
cutting device
slot
teeth
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
US6232A
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English (en)
Inventor
Kostenowczyk Stanley
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.)
Singer Co
Original Assignee
Singer Co
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 Singer Co filed Critical Singer Co
Priority to US6232A priority Critical patent/US3025811A/en
Priority to DES36806U priority patent/DE1870279U/de
Priority to GB3885/61A priority patent/GB900871A/en
Application granted granted Critical
Publication of US3025811A publication Critical patent/US3025811A/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
    • D05B65/00—Devices for severing the needle or lower thread
    • D05B65/003—Devices for severing the needle or lower thread the thread being engaged manually against the cutting edge of a fixedly arranged knife

Definitions

  • This invention relates to sewing machines and more particularly to a device intended for use with a sevwng machine and designed to hold and cut a thread-chain after the said thread-chain has been formed by the stitch forming instrumentalities of the sewing machine and the primary object of the present invention is to provide an improved device of this character.
  • Another object of the invention is to provide an improved thread-chain gripping and holding device.
  • a further object of the invention is to provide an improved thread gripping device having provisions for guiding the thread-chain into the gripping device.
  • a still further object of the invention is to provide an improved thread-chain gripping device having gripping slots bounded by at least one resilient tooth.
  • the invention comprises the devices, combinations and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodiment of the invention, from which the several features of the invention and the advantages att ained thereby will be readily understood by those skilled in the art.
  • FIG, 1 is an end elevational view, partly in section, of a sewing machine equipped with a thread-chain cutting and holding device embodying the present invention
  • FIG. 2 is a fragmentary plan view taken substantially on the line 2-2 of FIG. 1,
  • FIG. 3 is an enlarged fragmentary sectional view taken on the line 3-3 of FIG. 2 and showing the thread-chain being cut
  • FIG. 4 is an enlarged fragmentary sectional view taken on the line 4-4 of FIG. 2 and showing the thread-chain being held, and
  • FIG. 5 is an enlarged exploded perspective view showing the holding and cutting device of the present invention.
  • the thread-chain holding and cutting device illustrated in FIGS. 1-5, inclusive, is shown associated with a sewing machine 15 having a base 16, the top of which forms a work supporting surface 17 into which is recessed a throat plate 18 held by screws 19.
  • a standard 2.1 rises from the base 16 and supports a bracket arm having a head 22 which carries a presser bar 23 and a needle bar 24.
  • the end 26 of the base 16 is provided with a pair of threaded holes, only one, namely hole 27, being shown.
  • the holes 27 accommodate a pair of screw 28-28 which secure the thread-chain holding and cutting device 29 to the face of the end 26.
  • the thread-chain holding and cutting device 29 embodying the present invention comprises two major parts, namely a block 32 formed from a plastic such as nylon or other suitable material, and a preferably metallic knife blade 33
  • the block 32 is substantially in the form of a rectangular parallelepiped having a pair of cylindrical holes 34-34 for accommodating the screws 28-28.
  • the upper end of the block 32 is beveled on all four edges as indicated by the numeral 36 and the upper end of the 3,025,811 Patented Mar. 20, 1962 block 32 has a plurality, in this instance nine thread-chain gripping slots designated as slots 37-38.
  • each of the slots 37 is bounded on its two sides by a narrow tooth 39 whereas each of the slots 38 is bounded on one of its sides by a narrow tooth 39 and on its other side by a thick tooth 41. Because of this, each slot, whether it be slot 37 or 38, has at least one of its sides bounded by a narrow tooth 39 which, because of its thinness, is resilient.
  • each thick tooth 41 has an inner bevel 42 and each narrow tooth 39 has two inner bevels 42-42.
  • Reference to FIG. 4 shows that the inner bevels 4242 formed on adjacent teeth 39-39 or 39-41 provide a converging means for guiding a thread-chain into a slot 37 or 38.
  • the knife blade 33 is in the form of a flat plate having its top beveled to provide a cutting edge 43, and the main body of the blade 33 is provided with a pair of cylindrical holes 44-44 for accommodating the screws 28-28. As best seen in FIG. 3, the blade 33 is mounted in such a manner that the cut-ting edge 43 is positioned adjacent to the front face of the block 32 and sufficiently below the bevels 36 and 42 to insure that the thread-chain can be gripped in a slot 37 or 38 before the cutting edge 43 severs the thread-chain 46. Also the cutting edge 43 is located above the bottom of any of the slots 37 or 38.
  • the subject device functions in the following manner.
  • a thread-chain of sufficient length for example, the thread-chain 46 (FIGS, 3 and 4)
  • the standing part 47 of the thread-chain 46 is placed between an adjacent pair of the inner bevels 42-42 and is thereby guided into one of the slots 37 or 38 where, due to the resilience of one or more of the narrow teeth 39 the thread chain 46 will be securely gripped.
  • the threadchain 46 is pulled downwardly, it engages the cutting edge 43 which severs the thread-chain, as shown in FIG. 3 to separate the end 48 from the standing part 47.
  • the standing part 47 of course, remains held after the end 48 is separated therefrom. Because the knife blade 33 is secured to the lower portion of the block 32, the blade 33 does interfere with operation of the resilient teeth 39.
  • a thread-chain holding and cutting device comprising a plastic block having a pair of teeth defining a slot therebetween, at least one of said teeth being sufficiently resilient to yield when a thread-chain is forced into said slot, and a knife blade positioned against one side face of said plastic block.
  • a thread-chain holding and cutting device comprising a plastic block having a plurality of teeth defining slots therebetween, at least one of the teeth bounding each slot being sufficiently resilient to yield when a threadchain is forced into said slot, and a knife blade positioned against one side face of said block.
  • a thread-chain holding and cutting device comprising a nylon block having a pair of teeth defining a slot therebetween, both of said teeth having an inner bevel, said inner bevels functioning to guide a threadchain into said slot, and at least one of said teeth being sufficiently resilient to yield when a thread-chain is forced into said slot, and a knife blade positioned against one side face of said nylon block.
  • a thread-chain holding and cutting device comprising a nylon block having a pair of teeth defining a slot therebetween, both of said teeth having an inner 3 4 bevel, said inner bevels functioning to guide a thread References Cited in the file of this patent chain into said slot, and at least one of said teeth being UNITED STATES PATENTS sufliclently resilient to weld when a thread-chem is forced D k into said slot, and a knife blade positioned against one 307,271 Ta 6 1884 side face of said nylon block, said knife blade, having a 5 840,887 Wood 81 1907 cutting edge located sufficiently below the bevels to ing fif g r -g :13: 3 sure that the thread-chain W111 be gripped 1n the slot be- 2:867:184 pp mun- 1 1959 fore the cutting edge severs the said thread-chain.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US6232A 1960-02-02 1960-02-02 Thread-chain holding and cutting device for sewing machines Expired - Lifetime US3025811A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US6232A US3025811A (en) 1960-02-02 1960-02-02 Thread-chain holding and cutting device for sewing machines
DES36806U DE1870279U (de) 1960-02-02 1961-01-31 Vorrichtung zum halten und zum durchschneiden von fadenketten fuer naehmaschinen.
GB3885/61A GB900871A (en) 1960-02-02 1961-02-01 Thread-chain holding and cutting device for sewing machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6232A US3025811A (en) 1960-02-02 1960-02-02 Thread-chain holding and cutting device for sewing machines

Publications (1)

Publication Number Publication Date
US3025811A true US3025811A (en) 1962-03-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US6232A Expired - Lifetime US3025811A (en) 1960-02-02 1960-02-02 Thread-chain holding and cutting device for sewing machines

Country Status (3)

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US (1) US3025811A (de)
DE (1) DE1870279U (de)
GB (1) GB900871A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3924554A (en) * 1974-11-18 1975-12-09 Amf Inc Thread chain cutting apparatus
US4138957A (en) * 1977-11-07 1979-02-13 Levi Strauss & Company Vacuum thread cutter for use in an automated textile sewing operation
US4599961A (en) * 1984-11-09 1986-07-15 Rockwell-Rimoldi S.P.A. Sewing machine thread chain cutter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US307271A (en) * 1884-10-28 Twine-cutter
US840887A (en) * 1906-01-15 1907-01-08 Nat Machine Co Thread-clip for sewing-machines.
US2261680A (en) * 1939-10-14 1941-11-04 Singer Mfg Co Thread cutting and nipping device for sewing machines
US2407578A (en) * 1945-07-03 1946-09-10 Century Mills Thread cutter
US2867184A (en) * 1958-03-17 1959-01-06 Superior Sewing Machine & Supp Thread cutter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US307271A (en) * 1884-10-28 Twine-cutter
US840887A (en) * 1906-01-15 1907-01-08 Nat Machine Co Thread-clip for sewing-machines.
US2261680A (en) * 1939-10-14 1941-11-04 Singer Mfg Co Thread cutting and nipping device for sewing machines
US2407578A (en) * 1945-07-03 1946-09-10 Century Mills Thread cutter
US2867184A (en) * 1958-03-17 1959-01-06 Superior Sewing Machine & Supp Thread cutter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3924554A (en) * 1974-11-18 1975-12-09 Amf Inc Thread chain cutting apparatus
US4138957A (en) * 1977-11-07 1979-02-13 Levi Strauss & Company Vacuum thread cutter for use in an automated textile sewing operation
US4599961A (en) * 1984-11-09 1986-07-15 Rockwell-Rimoldi S.P.A. Sewing machine thread chain cutter

Also Published As

Publication number Publication date
DE1870279U (de) 1963-04-11
GB900871A (en) 1962-07-11

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