US3788245A - Universal knife block for tufting machines - Google Patents

Universal knife block for tufting machines Download PDF

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Publication number
US3788245A
US3788245A US3788245DA US3788245A US 3788245 A US3788245 A US 3788245A US 3788245D A US3788245D A US 3788245DA US 3788245 A US3788245 A US 3788245A
Authority
US
United States
Prior art keywords
knife
cavity
looper
cutting
substantially rectangular
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
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English (en)
Inventor
A Bonner
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.)
SPENCER WRIGHT INDUSTRIES Inc A CORP OF TENNESSEE
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
Application granted granted Critical
Publication of US3788245A publication Critical patent/US3788245A/en
Assigned to SPENCER WRIGHT INDUSTRIES, INC., A CORP OF TENNESSEE reassignment SPENCER WRIGHT INDUSTRIES, INC., A CORP OF TENNESSEE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: FIRST NATIONAL BANK OF BOSTON, THE A NATIONAL BANKING ASSOCIATION, FNB FINACIAL COMPANY A MASSACHUSETTS BUSINESS TRUST
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C15/00—Making pile fabrics or articles having similar surface features by inserting loops into a base material
    • D05C15/04—Tufting
    • D05C15/08—Tufting machines
    • D05C15/16—Arrangements or devices for manipulating threads
    • D05C15/24—Loop cutters; Driving mechanisms therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
    • Y10T407/2266—Holder adapted for tools of different shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
    • Y10T407/2272—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder
    • Y10T407/2282—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder including tool holding clamp and clamp actuator
    • Y10T407/2284—Wedge clamp element
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9457—Joint or connection
    • Y10T83/9488—Adjustable
    • Y10T83/949—Rectilinearly

Definitions

  • Knife blocks for tufting machines known in the prior art are generally of a construction such that they accommodate only one or a very limited range of sizes of knives.
  • Knife blocks for tufting machines are generally of a construction such that they accommodate only one or a very limited range of sizes of knives.
  • a tufting machine is converted from one use to another, such as from tufting heavy yarns to light yarns or yarns of different composition, it may be necessary to change the knife blocks for supporting the different size cutting knives.
  • the invention is generally carried out by providing a two section or two piece knife block construction with each piece having a wedge shaped or triangular groove provided therein at its knife engaging side which when in assembled condition provides a truncated-shaped knife supporting cavity.
  • One of the pieces is provided with blind screwthreaded holes adjacent each end of the piece and the other is provided with through holes for receiving screws therethrough for threading into the blind screwthreaded holes.
  • FIG. 1 is a side elevational view of some of the tufting components of a tufting machine and illustrating the knife block of the invention
  • FIG. 2 is a partial sectional view taken along line 22 of FIG. 1;
  • FIG. 3 is a partial sectional view taken along line 3-3 of FIG. 1;
  • FIG. 4 is a partial exploded perspective view of the knife block of the invention.
  • FIG. 5 is a top plan view showing one size knife in a clamped position.
  • FIG. 6 is a top plan view showing a different size knife in a clamped position.
  • a tufting machine hook or looper 10 is shown as being supported in a looper block 12 which is in turn supported by a block support 14.
  • block support 14 is suitably bolted to a rock shaft 16 for rocking the looper 10 back and forth for picking up a loop of yarn from the needle (not shown) in a known manner.
  • the looper 10 is generally rocked into a position for cooperating with a knife mechanism in a timed relationship for cutting the loop of yarn to form cut pile.
  • a cutting knife 18 is carried by a knife block 20 which in turn is supported on a rock shaft 22 for oscillating the knife back and forth into cutting engagement with the yarn on the looper.
  • a rock shaft 22 for oscillating the knife back and forth into cutting engagement with the yarn on the looper.
  • the knife block 20 comprises a pair of generally rectangular pieces 24 and 26 each of which includes a triangular-shaped or wedge shaped cut-out or groove portion 28 and 30, respectively.
  • the piece 26 further includes a lug 32 integral therewith for supporting the knife block in the rock shaft 22, as illustrated in FIG. 1.
  • the cut-outs 28 and 30 may be each inclined from one side of their respective sides to the other so that a knife 18 supported therein will be at a desired angle relative to the cutting edge on the looper 10 for providing a scissor-like action therewith.
  • the inclination of the knife may be varied or other means for adjusting the position of the knife relative to the looper provided.
  • the piece 26 is provided with blind screw threaded holes 34 and 36 which mate with through holes 38 and 40 in piece 24 when the knife block is assembled. Screws 42 are provided for threading into holes 34 and 36 through holes 38 and 40 so that the knife can be securly clamped in the knife block and so that the pieces 24 and 26 may be adjusted relative to one another for accommodating different size knives.
  • the two wedge-shaped cut-outs 28 and 30 combine to form a truncated-shaped knife receiving cavity 44 having knife engaging surfaces 46, 48, 50 and 52.
  • the surfaces 50 and 52 combine to form a substantially flat surface on which a flat surface of the knife rests.
  • the non-parallel surfaces 46 and 48 of the truncatedshaped cavity will engage edges on the knife 18 as illustrated, and will act in a wedging manner to clamp the knife in the block.
  • the edges 46 and 48 can accommodate a knife edge substantially anywhere along their surface so that over-all the cavity 44 may accommodate a wide range of varying width and thickness knives. As shown in the drawing a relatively narrow width and thin knife can be accommodated therein, as shown in FIG. 5 as well as a wider width and thicker knife 18', as shown in FIG. 6.
  • a yarn loop cutting apparatus for a tufting machine including an elongated loop cutting knife of substantially rectangular cross-section, a knife block including a substantially rectangular knife supporting body, said knife supporting body having an elongated cavity extending the entire length thereof for receiving said knife, said cavity having a truncated shape with sloping side walls for wedging the substantially flat side walls of said knife therebetween and means for clamping said knife between the sloping side walls of said cavity such that different size knives can be accommodated in said cavity.
  • a yarn loop cutting apparatus as recited in claim 1 wherein said cavity extends in a direction parallel to a diagonal of said substantially rectangular knife supporting body.
  • a tufting machine having looper means for seizing loops from a yarn carrying needle and a cutting apparatus for cutting the loops of yarn seized by said looper means
  • said looper means including an oscillating looper having a substantially rectangular crosssection with one edge thereof forming a cutting edge
  • said cutting apparatus including a substantially rectangular cutting knife having a cutting edge disposed for cooperation with the cutting edge as said looper, means for initiating relative oscillating motion between said looper and said knife such that the cutting edges on said looper and said knife cooperate to cut a loop disposed on said looper
  • said cutting apparatus further including a knife supporting block having a substantially rectangular cross-section and having a truncated cavity disposed therein with the side walls of said cavity being disposed at an acute angle with respect to the base wall of said cavity, and means for clamping said substantially rectangular knife in said cavity with its end walls in clamping relationship with the side walls of said cavity whereby said knife is clamped in a wedging relationship with said cavity side walls.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Treatment Of Fiber Materials (AREA)
US3788245D 1972-05-08 1972-05-08 Universal knife block for tufting machines Expired - Lifetime US3788245A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US25112872A 1972-05-08 1972-05-08
GB3898673A GB1438394A (en) 1972-05-08 1973-08-17 Knife block for a tufting machine
BE135526A BE804696A (fr) 1972-05-08 1973-09-10 Bloc porte-couteau pour machine a implanter du poil en touffes
NL7312705A NL7312705A (nl) 1972-05-08 1973-09-14 Meshouder voor een kuifinrichting.

Publications (1)

Publication Number Publication Date
US3788245A true US3788245A (en) 1974-01-29

Family

ID=27424608

Family Applications (1)

Application Number Title Priority Date Filing Date
US3788245D Expired - Lifetime US3788245A (en) 1972-05-08 1972-05-08 Universal knife block for tufting machines

Country Status (4)

Country Link
US (1) US3788245A (nl)
BE (1) BE804696A (nl)
GB (1) GB1438394A (nl)
NL (1) NL7312705A (nl)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061095A (en) * 1976-09-29 1977-12-06 Spencer Wright Industries, Inc. Means for mounting tufting machine hooks and knives
US4069776A (en) * 1976-08-23 1978-01-24 B & J Machinery Company, Inc. Knife block for cut pile tufting machine
US4185568A (en) * 1978-03-01 1980-01-29 Spencer Wright Industries, Inc. Cutting instrumentalities for tufting machines
US4193360A (en) * 1978-01-09 1980-03-18 Edgar Pickering (Blackburn) Limited Knife block assembly tufting machines
US4211176A (en) * 1978-11-15 1980-07-08 Spencer Wright Industries, Inc. Knife block for tufting machines
US4289082A (en) * 1980-01-11 1981-09-15 Spencer Wright Industries, Inc. Knife block for tufting machines
EP0133429A1 (en) * 1982-11-29 1985-02-27 Tuftco Corporation Knife holder module for cut pile tufting machine
US5555834A (en) * 1992-04-17 1996-09-17 Bonner; Kevin B. Double-needle chuck assembly with movable knife for sewing machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US306257A (en) * 1884-10-07 Moses
US567685A (en) * 1896-09-15 Half to per a
US2849787A (en) * 1954-02-17 1958-09-02 Hertel Karl Cutting tools
US3277852A (en) * 1965-01-07 1966-10-11 Roy T Card Knife block for a tufting machine
US3386398A (en) * 1964-12-29 1968-06-04 Southern Machine Company Inc Tufting machine knife block
US3604379A (en) * 1970-06-12 1971-09-14 B & J Machinery Co Knife block for cut pile tufting machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US306257A (en) * 1884-10-07 Moses
US567685A (en) * 1896-09-15 Half to per a
US2849787A (en) * 1954-02-17 1958-09-02 Hertel Karl Cutting tools
US3386398A (en) * 1964-12-29 1968-06-04 Southern Machine Company Inc Tufting machine knife block
US3277852A (en) * 1965-01-07 1966-10-11 Roy T Card Knife block for a tufting machine
US3604379A (en) * 1970-06-12 1971-09-14 B & J Machinery Co Knife block for cut pile tufting machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4069776A (en) * 1976-08-23 1978-01-24 B & J Machinery Company, Inc. Knife block for cut pile tufting machine
US4061095A (en) * 1976-09-29 1977-12-06 Spencer Wright Industries, Inc. Means for mounting tufting machine hooks and knives
US4193360A (en) * 1978-01-09 1980-03-18 Edgar Pickering (Blackburn) Limited Knife block assembly tufting machines
US4185568A (en) * 1978-03-01 1980-01-29 Spencer Wright Industries, Inc. Cutting instrumentalities for tufting machines
US4211176A (en) * 1978-11-15 1980-07-08 Spencer Wright Industries, Inc. Knife block for tufting machines
US4289082A (en) * 1980-01-11 1981-09-15 Spencer Wright Industries, Inc. Knife block for tufting machines
EP0133429A1 (en) * 1982-11-29 1985-02-27 Tuftco Corporation Knife holder module for cut pile tufting machine
EP0133429A4 (en) * 1982-11-29 1985-06-26 Tuftco Corp KNIFE HOLDING MODULE FOR TUFTING CARPETS WITH CUT POL.
US5555834A (en) * 1992-04-17 1996-09-17 Bonner; Kevin B. Double-needle chuck assembly with movable knife for sewing machine

Also Published As

Publication number Publication date
BE804696A (fr) 1974-01-02
GB1438394A (en) 1976-06-03
NL7312705A (nl) 1975-03-18

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SPENCER WRIGHT INDUSTRIES, INC., A CORP OF TENNESS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:FNB FINACIAL COMPANY A MASSACHUSETTS BUSINESS TRUST;FIRST NATIONAL BANK OF BOSTON, THE A NATIONAL BANKING ASSOCIATION;REEL/FRAME:004248/0926

Effective date: 19840209