US3224396A - Tufting machine hook and knife mechanism - Google Patents

Tufting machine hook and knife mechanism Download PDF

Info

Publication number
US3224396A
US3224396A US329061A US32906163A US3224396A US 3224396 A US3224396 A US 3224396A US 329061 A US329061 A US 329061A US 32906163 A US32906163 A US 32906163A US 3224396 A US3224396 A US 3224396A
Authority
US
United States
Prior art keywords
hook
knife blade
blade
cutting edge
knife
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
US329061A
Inventor
Bernard H Wittler
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
Priority to US329061A priority Critical patent/US3224396A/en
Priority to GB49632/64A priority patent/GB1017030A/en
Application granted granted Critical
Publication of US3224396A publication Critical patent/US3224396A/en
Anticipated expiration legal-status Critical
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
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • an oscillatable hook including a loop-seizing blade having a cutting edge along its lower edge and an oscillatable knife blade having one surface in abutment with one surface of the hook and having a cutting edge along its upper edge that cooperates in a scissor-like manner with the cutting edge of the hook to cut a loop of yarn on the loop-seizing blade of the hook.
  • Another object of the invention is to provide a means in accordance with the foregoing object for lubricating the opposed surfaces of a hook and a knife blade in a cut pile tufting machine Without soiling the pile yarn.
  • a still further object of the invention is to provide an improved means for biasing a knife blade against one face of a hook in a cut pile tufting machine.
  • FIG. 1 is a side elevation of the device of the invention
  • FIG. 2 is an exploded perspective view of the hook and the knife blade shown in FIG. 1,
  • FIG. 3 is a section view taken along the line 3-3 in FIG. 1, and
  • FIG. 4 is a top plan view of the device of the invention.
  • the hook mechanism 10 includes a hook bracket 12 connected to an oscillatable hook shaft 13 by means of a screw 14. Carried by the bracket 12 is a hook bar 15 having a hook receiving slot 16.
  • a hook 17 having a mounting portion 18 at its lower end is removably secured in the slot 16 in the hook bar 15 by means of a setscrew 19.
  • the hook 17 has a loopseizing blade 20 at its upper end, and a cutting edge 21 is formed along the lower edge of the loop-seizing blade 20.
  • a block 22 having a bore 23 therethrough is secured to one surface of the hook 17.
  • One end of the bore 23 in the block 22 is in communication with a bore 24 in the hook 17 having an opening 25 on the surface of the 3,224,395 Patented Dec. 21, 1965 added substance for the bore 23.
  • the knife mechanism 11 of the machine includes a knife bracket 27 connected by means of a screw 28 to an oscillatable knife shaft 29 that is parallel to the hook shaft 13.
  • Lever means including a knife carrier 30 is pivotally secured to the top of the knife bracket 27 by means of its shaft 31 held by a bushing plate 32 and screws 33.
  • the knife carrier 30 has an arm 34 connected to the top of the shaft 31 with an aperture 35 in its free end.
  • a knife blade 36 having a lug 37 projecting from one surface is removably connected to the free end of the arm 34 of the knife carrier 30 by means of a snug fit between the lug 37 and the complemental aperture 35 formed in the free end of the arm 34.
  • a cutting edge 38 is formed along the upper edge of the knife blade 36. It is within the scope of the invention to have the opening 25 on the surface of the hook 17 on the opposed surface of the knife blade 36 instead, with attendant necessary structural changes.
  • a crank 39 having a crankpin 40 is connected to the bottom of the shaft 31 of the knife carrier 30.
  • a bore 41 is formed in the intermediate portion of the knife bracket 27 with its outlet end opening in proximity to the crankpin 40 of the crank 39.
  • a piston 42 is slidably connected in the outlet end of the bore 41 for coaction with the crankshaft 40 of the crank 39.
  • a tube or conduit 43 is connected to the inlet end of the bore 41 and to a source of air under pressure.
  • the knife blade 36 is oscillated by the knife shaft 29 to cut the end of the loop of yarn by the scissorlike action of the cutting edge 21 of the loop-seizing blade 20 and the cutting edge 38 of the knife blade 36.
  • the introduction of air under pressure between the opposed surfaces of the hook 17 and the knife blade 36 not only reduces the generation of heat caused by friction by interposing a cushion of air between the opposed surfaces of the book 17 and the knife blade 36 but further dissipates heat through the circulation of air. Instead of heating up at high speeds, tests have indicated that the knife blade 36 actually runs cooler than the ambient air. In addition, the air will not soil the pile yarn as would be the case with oil and all similar lubricants, and the circulation of air prevents the accumulation of lint about the book 17 and the knife blade 36.
  • a hook including a loop-seizing blade having a cutting edge along its lower edge, -a knife blade having a cutting edge along its upper edge, means for effecting relative motion between said hook and said knife blade, said knife blade having one surface disposed in abutment with one surface of said hook for cooperation of the cutting edge of said knife blade with the cutting edge of said hook during relative movement of said hook and said knife blade to cut a loop of yarn on the loopseizing blade of said hook to produce cut pile, means for biasing said one surface of said knife blade against said one surface of said hook, and means for introducing air under pressure between said opposed surfaces of said hook and said knife blade for reducing friction between said opposed surfaces of said hook and said knife blade.
  • an osci-llatable hook including a loop-seizing blade having a cutting edge along its lower edge, an oscillatable knife blade having a cutting edge along its upper surface, said knife blade having one surface disposed in abutment with one surface of said hook for cooperation of the cutting edge of said knife blade with the cutting edge of said hook during coordinated oscillation of said hook and said knife blade to cut a loop of yarn on the loop-seizing blade of said hook to produce cut pile, pneumatic means for biasing said one surface of said knife blade against said one surface of said hook, and means for introducing air under pressure between said opposed surfaces of said hook and said knife blade for reducing friction between said opposed surfaces of said hook and said knife blade.
  • an oscillatable hook including a loop-seizing blade having a cutting edge along its lower edge, an oscillatable knife blade having a cutting edge along its upper edge, said knife blade having one surface disposed in abutment with one surface of said hook for cooperation of the cutting edge of said knife blade with the cutting edge of said hook during coordinated oscillation of said hook and said knife blade to cut a loop of yarn on the loop-seizing blade of said hook to produce cut pile, level means connected to said knife blade, pneumatic means disposed for coaction with said lever means for biasing said one surface of said knife blade against said one surface of said hook, and means for introducing air under pressure between said opposed surfaces of said hook and said knife blade for reducing friction between said opposed surfaces of said hook and said knife blade.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Sawing (AREA)

Description

Dec. 21, 1965 I H. WITTLER 3,224,396
TUFTING MACHINE HOOK AND KNIFE MECHANISM Filed Dec. 9, 1963 INVENTOR. i 2 BY Bernard H.W|Hler Witness Z wa/b M M Attorney United States Patent 3,224,396 TUFTING MACHINE HOOK AND KNIFE MECHANISM Bernard H. Wittler, Rossville, Ga., assignor to The Singer Company, New York, N.'Y., a corporation of New Jersey Filed Dec. 9, 1963, Ser. No. 329,061 3 Claims. (Cl. 112-79) This invention relates to a cut pile tufting machine and has as its primary object to provide a cut pile tufting machine capable of high speed operation.
In a cut pile tufting machine, there is provided an oscillatable hook including a loop-seizing blade having a cutting edge along its lower edge and an oscillatable knife blade having one surface in abutment with one surface of the hook and having a cutting edge along its upper edge that cooperates in a scissor-like manner with the cutting edge of the hook to cut a loop of yarn on the loop-seizing blade of the hook.
During operation of the machine, friction between the hook and the knife blade generates a considerable amount of heat which limits the operating speed of the machine. When it is attempted to operate the machine at a speed in the neighborhood of 3,000 stitches per minute, the heat that is generated is so intense that the knife blade is destroyed within a few minutes' Besides initially destroying the temper of the metal, the heat causes the knife blade to burn through the loops of yarn instead of cutting them; and when synthetic yarn is used, the cut pile fuses together. Oil, and all similar lubricants, cannot be used because of the intimate association of the hook and the knife blade with the pile yarn.
It is, therefore, another object of the invention to provide an improved means for reducing the heat generated between the opposed surfaces of a hook and a knife blade in a cut pile tufting machine.
Another object of the invention is to provide a means in accordance with the foregoing object for lubricating the opposed surfaces of a hook and a knife blade in a cut pile tufting machine Without soiling the pile yarn.
A still further object of the invention is to provide an improved means for biasing a knife blade against one face of a hook in a cut pile tufting machine.
Other objects and a fuller understanding of the invention may be had by referring to the following description and claims, taken in conjunction with the accompanying drawings in which:
FIG. 1 is a side elevation of the device of the invention,
FIG. 2 is an exploded perspective view of the hook and the knife blade shown in FIG. 1,
FIG. 3 is a section view taken along the line 3-3 in FIG. 1, and
FIG. 4 is a top plan view of the device of the invention.
With reference to the drawings, there is provided a hook mechanism and a knife mechanism 11. The hook mechanism 10 includes a hook bracket 12 connected to an oscillatable hook shaft 13 by means of a screw 14. Carried by the bracket 12 is a hook bar 15 having a hook receiving slot 16.
A hook 17 having a mounting portion 18 at its lower end is removably secured in the slot 16 in the hook bar 15 by means of a setscrew 19. The hook 17 has a loopseizing blade 20 at its upper end, and a cutting edge 21 is formed along the lower edge of the loop-seizing blade 20.
A block 22 having a bore 23 therethrough is secured to one surface of the hook 17. One end of the bore 23 in the block 22 is in communication with a bore 24 in the hook 17 having an opening 25 on the surface of the 3,224,395 Patented Dec. 21, 1965 added substance for the bore 23.
The knife mechanism 11 of the machine includes a knife bracket 27 connected by means of a screw 28 to an oscillatable knife shaft 29 that is parallel to the hook shaft 13. Lever means including a knife carrier 30 is pivotally secured to the top of the knife bracket 27 by means of its shaft 31 held by a bushing plate 32 and screws 33.
The knife carrier 30 has an arm 34 connected to the top of the shaft 31 with an aperture 35 in its free end. A knife blade 36 having a lug 37 projecting from one surface is removably connected to the free end of the arm 34 of the knife carrier 30 by means of a snug fit between the lug 37 and the complemental aperture 35 formed in the free end of the arm 34. A cutting edge 38 is formed along the upper edge of the knife blade 36. It is within the scope of the invention to have the opening 25 on the surface of the hook 17 on the opposed surface of the knife blade 36 instead, with attendant necessary structural changes.
A crank 39 having a crankpin 40 is connected to the bottom of the shaft 31 of the knife carrier 30. A bore 41 is formed in the intermediate portion of the knife bracket 27 with its outlet end opening in proximity to the crankpin 40 of the crank 39. A piston 42 is slidably connected in the outlet end of the bore 41 for coaction with the crankshaft 40 of the crank 39. A tube or conduit 43 is connected to the inlet end of the bore 41 and to a source of air under pressure.
In operation, air under pressure is introduced between the opposed surfaces of the hook 17 and the knife blade 36 through the opening 25 in the surface of the hook 17. Simultaneously, the surface of the knife blade 36 opposite from the lug 37 is biased against the opposed surface of the hook 17 by means of the pressure of the piston 42 against the crankshaft 40 of the crank 39.
After the loop seizing blade 20 through the oscillation of the hook shaft 13 has seized a loop of yarn, the knife blade 36 is oscillated by the knife shaft 29 to cut the end of the loop of yarn by the scissorlike action of the cutting edge 21 of the loop-seizing blade 20 and the cutting edge 38 of the knife blade 36.
Thus, the introduction of air under pressure between the opposed surfaces of the hook 17 and the knife blade 36 not only reduces the generation of heat caused by friction by interposing a cushion of air between the opposed surfaces of the book 17 and the knife blade 36 but further dissipates heat through the circulation of air. Instead of heating up at high speeds, tests have indicated that the knife blade 36 actually runs cooler than the ambient air. In addition, the air will not soil the pile yarn as would be the case with oil and all similar lubricants, and the circulation of air prevents the accumulation of lint about the book 17 and the knife blade 36. The use of a pneumatic piston 42 in opposition to the force existed by the introduction of air under pressure between the opposed surfaces of the hook 17 and the knife blade 36 makes it possible to adjust the characteristics of the cushion of air between the opposed surfaces of the hook 17 and the knife blade 36 by coordinating the pressure of the air to the piston 42 with the pressure of the air introduced between the opposed surfaces of the hook 17 and the knife blade 36,
Although the invention has been described in its preferred form with a certain degree of particularity, it is form has been made by way of example and that numerous changes in the details of construction and the combination and arrangement of parts may be resorted towithout departing from the spirit and the scope of the invention.
What is claimed is:
1. In a tufting machine, a hook including a loop-seizing blade having a cutting edge along its lower edge, -a knife blade having a cutting edge along its upper edge, means for effecting relative motion between said hook and said knife blade, said knife blade having one surface disposed in abutment with one surface of said hook for cooperation of the cutting edge of said knife blade with the cutting edge of said hook during relative movement of said hook and said knife blade to cut a loop of yarn on the loopseizing blade of said hook to produce cut pile, means for biasing said one surface of said knife blade against said one surface of said hook, and means for introducing air under pressure between said opposed surfaces of said hook and said knife blade for reducing friction between said opposed surfaces of said hook and said knife blade.
2. In a tufting machine, an osci-llatable hook including a loop-seizing blade having a cutting edge along its lower edge, an oscillatable knife blade having a cutting edge along its upper surface, said knife blade having one surface disposed in abutment with one surface of said hook for cooperation of the cutting edge of said knife blade with the cutting edge of said hook during coordinated oscillation of said hook and said knife blade to cut a loop of yarn on the loop-seizing blade of said hook to produce cut pile, pneumatic means for biasing said one surface of said knife blade against said one surface of said hook, and means for introducing air under pressure between said opposed surfaces of said hook and said knife blade for reducing friction between said opposed surfaces of said hook and said knife blade.
3. In a tufting machine, an oscillatable hook including a loop-seizing blade having a cutting edge along its lower edge, an oscillatable knife blade having a cutting edge along its upper edge, said knife blade having one surface disposed in abutment with one surface of said hook for cooperation of the cutting edge of said knife blade with the cutting edge of said hook during coordinated oscillation of said hook and said knife blade to cut a loop of yarn on the loop-seizing blade of said hook to produce cut pile, level means connected to said knife blade, pneumatic means disposed for coaction with said lever means for biasing said one surface of said knife blade against said one surface of said hook, and means for introducing air under pressure between said opposed surfaces of said hook and said knife blade for reducing friction between said opposed surfaces of said hook and said knife blade.
References Cited by the Examiner UNITED STATES PATENTS 2,330,615 9/1943 Parker 112-79 2,400,741 5/ 1946 Christensen 112218 FOREIGN PATENTS 871,991 3/ 1953 Germany.
JORDAN FRANKLIN, Primary Examiner.

Claims (1)

1. IN A TUFTING MACHINE, A HOOK INCLUDING A LOOP-SEIZING BLADE HAVING A CUTTING EDGE ALONG ITS LOWER EDGE, A KNIFE BLADE HAVING A CUTTING EDGE ALONG ITS UPPER EDGE, MEANS FOR EFFECTING RELATIVE MOTION BETWEEN SAID HOOK AND SAID KNIFE BLADE, SAID KNIFE BLADE HAVING ONE SURFACE DISPOSED IN ABUTMENT WITH ONE SURFACE OF SAID HOOK FOR COOPERATION OF THE CUTTING EDGE OF SAID KNIFE BLADE WITH THE CUTTING EDGE OF SAID HOOK DURING RELATIVE MOVEMENT OF SAID HOOK AND SAID KNIFE BLADE TO CUT A LOOP OF YARN ON THE LOOPSEIZING BLADE OF SAID HOOK TO PRODUCE CUT PILE, MEANS FOR BIASING SAID ONE SURFACE OF SAID KNIFE BLADE AGAINST SAID ONE SURFACE OF SAID HOOK, AND MEANS FOR INTRODUCING AIR UNDER PRESSURE BETWEEN SAID OPPOSED SURFACES OF SAID HOOK AND SAID KNIFE BLADE FOR REDUCING FRICTION BETWEEN SAID HOOK OPPOSED SURFACES OF SAID HOOK AND SAID KNIFE BLADE.
US329061A 1963-12-09 1963-12-09 Tufting machine hook and knife mechanism Expired - Lifetime US3224396A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US329061A US3224396A (en) 1963-12-09 1963-12-09 Tufting machine hook and knife mechanism
GB49632/64A GB1017030A (en) 1963-12-09 1964-12-07 Tufting machine hook and knife mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US329061A US3224396A (en) 1963-12-09 1963-12-09 Tufting machine hook and knife mechanism

Publications (1)

Publication Number Publication Date
US3224396A true US3224396A (en) 1965-12-21

Family

ID=23283699

Family Applications (1)

Application Number Title Priority Date Filing Date
US329061A Expired - Lifetime US3224396A (en) 1963-12-09 1963-12-09 Tufting machine hook and knife mechanism

Country Status (2)

Country Link
US (1) US3224396A (en)
GB (1) GB1017030A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3267892A (en) * 1963-09-21 1966-08-23 Pfaff Ag G M Multiple automatic sewing apparatus
US4134347A (en) * 1978-01-31 1979-01-16 Spencer Wright Industries, Inc. Method and apparatus for tufting even level cut pile and loop pile in the same row of stitching
ITRM20130595A1 (en) * 2013-10-29 2015-04-30 Teknomac S R L SEWING MACHINE AND RELATED CROCHET DEVICE.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2330615A (en) * 1939-09-28 1943-09-28 Callaway Mills Tufting machine
US2400741A (en) * 1943-04-12 1946-05-21 Union Special Machine Co Sewing machine
DE871991C (en) * 1942-12-29 1953-03-26 Fritz Werner Ag Process for cooling punching, pressing and shearing tools during the work process

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2330615A (en) * 1939-09-28 1943-09-28 Callaway Mills Tufting machine
DE871991C (en) * 1942-12-29 1953-03-26 Fritz Werner Ag Process for cooling punching, pressing and shearing tools during the work process
US2400741A (en) * 1943-04-12 1946-05-21 Union Special Machine Co Sewing machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3267892A (en) * 1963-09-21 1966-08-23 Pfaff Ag G M Multiple automatic sewing apparatus
US4134347A (en) * 1978-01-31 1979-01-16 Spencer Wright Industries, Inc. Method and apparatus for tufting even level cut pile and loop pile in the same row of stitching
ITRM20130595A1 (en) * 2013-10-29 2015-04-30 Teknomac S R L SEWING MACHINE AND RELATED CROCHET DEVICE.
WO2015063804A1 (en) * 2013-10-29 2015-05-07 Teknomac S.R.L. Sewing machine and crochet device thereof

Also Published As

Publication number Publication date
GB1017030A (en) 1966-01-12

Similar Documents

Publication Publication Date Title
US3224396A (en) Tufting machine hook and knife mechanism
US2238796A (en) Overedge sewing machine
US2472862A (en) Cutting attachment for sewing machines
US2672112A (en) Sewing machine feeding mechanism
US2329681A (en) Needle-vibrating mechanism for sewing machines
US3216382A (en) Knife mechanism for tufting machines
US2048555A (en) Sewing machine
US3150622A (en) Reverse feed two thread chainstitch sewing machines
US3111918A (en) Sewing machine for sewing hides and skins
US3366084A (en) Sewing machine lubrication
US1433705A (en) Trimming mechanism for sewing machines
US2277971A (en) Sewing machine
US2619061A (en) Sewing machine lubrication
GB1069157A (en) Machine for overedge sewing
US2169579A (en) Ruffling and stitching machine
US3171372A (en) Edge trimming mechanism for sewing machines
US1750447A (en) Rotary-hook mechanism for sewing machines
US730946A (en) Trimming device for sewing-machines.
US1490803A (en) Picot-cutting attachment for sewing machines
US2046945A (en) Trimmer mechanism for sewing machines
US1319234A (en) Necticut
US2280278A (en) Tufting machine
GB487478A (en) Tufting attachment for sewing machines
US933033A (en) Trimming mechanism for sewing-machines.
US1422407A (en) Thread cutter

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