US2619987A - Tuft-cutting mechanism for axminster carpet looms - Google Patents

Tuft-cutting mechanism for axminster carpet looms Download PDF

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Publication number
US2619987A
US2619987A US121969A US12196949A US2619987A US 2619987 A US2619987 A US 2619987A US 121969 A US121969 A US 121969A US 12196949 A US12196949 A US 12196949A US 2619987 A US2619987 A US 2619987A
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United States
Prior art keywords
knife
cutting
screws
stock
cross
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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
US121969A
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English (en)
Inventor
Bassindale Isaac Bradley
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.)
Platt Brothers and Co Ltd
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Platt Brothers and Co Ltd
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 Platt Brothers and Co Ltd filed Critical Platt Brothers and Co Ltd
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Publication of US2619987A publication Critical patent/US2619987A/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D39/00—Pile-fabric looms
    • D03D39/24—Devices for cutting the pile on the loom
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D39/00—Pile-fabric looms
    • D03D39/02—Axminster looms, i.e. wherein pile tufts are inserted during weaving

Definitions

  • 'Ihis invention relates to improvements in pile tuft-cutting mechanism for Axminster carpet looms.
  • the tuft-cutting operation is performed by front and back cutter knives which cut the pile tufts woven into the fabric from the tube frames which supply the tuft-forming yarn.
  • the cutter knives are usually mounted on heavy cross-bars which extend across the width of the loom and the knives should have cutting engagement with one another throughout their entire length.
  • the present invention provides tuft-cutting mechanism for an Axminster carpet loom having co-operating front and back knives, in which the movable front knife may be accurately set in order to ensure a uniform pressure of its cutting edge against the back knife with which it co-operates and which is static during the actual cutting operation, and in which the front knife is provided with a multiplicity of independently adjustable pressure points spaced along its full length, whereby in the initial setting of the front knife a twist may be imparted to the blade of said front knife from end to end by pressure applied at certain points along the blade in order that its cutting edge may be adjusted to ensure correct cutting engagement with the back knife during the full cutting stroke, or whereby the cutting edge of said front knife may be subsequently adjusted at any particular point in which a defect has developed in use, said front knife comprising a cutter blade narrower at one end than at the other, and being secured in a knife stock, a cross bar carrying said knife stock and set at a slight angle to said cutter blade, slides, in which the said cross bar is mounted,
  • Fig. 1 is a plan View of an adjustable front knife, as viewed from the front of the loom, the view being broken to shorten the figure;
  • Fig. 2 is a plan of the front and back knives, drawn to a smaller scale;
  • Fig. 3 is an end elevation, partly sectional, of the front knife and carrier bar, drawn to a larger scale and viewed in the direction of the arrow A, Fig. l;
  • Figs. 4, 5 and 6 are cross-sectional views taken through the lines IV, V and VI respectively of Fig. 1, drawn to a larger scale.
  • the same reference characters are used to indicate corresponding parts in the several gures of the drawings.
  • the front cutter knife I0 is secured to a knife stock II which is mounted for limited local rocking or twisting movement on a cross-bar I3 set at a slight angle, e. g., 6D to the blade Ill, and mounted in slides, not shown, the cross-bar I3 being adapted for reciprocating movement in the working of the loom, whereby in the advance movement of the cross-bar I3, the front cutter knife I 0 is advanced in a forward and downwardly inclined path to co-operate with the back cutter knife I4 to sever the tufts woven into the fabric from the tube frames which supply the tuft-forming yarn.
  • the contiguous faces of the front knife stock II and of the cross-bar I3 are each formed with a relatively shallow V-groove I5, IS respectively, the opposed grooves serving to accomodate short rollers I1 interposed in spaced relation between the knife stock II and the cross-bar I3, the rollers I'I serving as fulcrums for the knife stock II.
  • the knife stock II is held in position on the cross-bar I3 by holding screws i8, passing through clearance holes I9 spaced along the length of the cross-bar I3 and disposed perpendicularly to the axial centre line of the rollers, the screws I8 engaging internally threaded holes 20 in the knife stock II, there being a holding screw I8 between the adjacent rollers I'I of each pair.
  • Each holding screw I8 is formed with a head I 8a which is accommodated in a recess 2i in the upper face of the cross-bar I3.
  • a washer 22 having a curved undersurface is interposed between the head ISa of the holding screw I8 and a correspondingly curved seating 2 Ia formed in the floor of the recess 2 I.
  • the cross-bar II is furnished with two rows of set-screws 23, 24 arranged on opposite sides of the rollers I'I and spaced between the aforesaid holding screws I8, the heads of the set-screws 23, 241, abutting against the upper surface of the knife stock I I.
  • screws 25 screwed into threaded holes in the carrier bar and each engaging the respective holding screw I8.
  • Fig. 2 the starting position of the cutting knife I is shown at lil', the first and second middle positions by the dotted lines I2 and
  • the front knife blade is twisted at points along its length in such manner that it is maintained in correct cutting relation with the back knife during the whole ofthe cutting stroke.
  • the screws 25 ofthe holding screw, or screws, I8 adjacent to the part of the knife Ill to be adjusted are slackened to free the said holding screw, or screws, I6. If it is desired to raise the cutting edge of the knife to bring it into correct cutting relation with the back knife Ill, the respective set screws 23 on the side of the cross-bar I3 adjacent to the front knife I0 are screwed further into the cross-bar I3 and the registering set screw, or set screws, 2:1 on the opposite side is or are screwed outwardly of the carrier I3.
  • the head, or heads, of the set-screw, or set-screws, 24 remote from the knife I bearing against the surface of the knife stock II cause the knife stock II to have a slight local twisting or rocking movement on the respective roller, or rollers, I'I until the movement is arrested by the head, or heads, of the set-screw, or set-screws, 23 adjacent to the knife lil, when the cutting edge of the front knife Il has been brought into correct cutting relation with the back knife Ill.
  • the front knife I may be readily adjusted into position to make correct cutting engagement with the back knife Il! at any part or parts of its length by manipulation of the screws 23 or 24 adjacent t0 the part to be adjusted without necessity for removal of the front knife IEB from the loom, whereby the cutting edge of the front knife I may be maintained in correct cutting position with the back knife Id as shown in Fig. 4.
  • Tuft-cutting mechanism for an Axminster carpet loom having a movable front knife comprising a cutter blade narrower at one end than at the other co-operating with a. back knife, in which the movable front knife may be accurately set in order to ensure a uniform pressure of its cutting edge against the back knife with which it co-operates, the back knife being static during the actual cutting operation, and in which the front knife is provided with a multiplicity of independently adjustable pressure points spaced along its full length, whereby in the initial setting of the front knife a twist may be imparted to the blade of said front knife from end to end by the application of pressure at certain points along its blade in order that its cutting edge may be adjusted to ensure correct cutting engagement with the back knife durlng the full cutting stroke, and whereby the cutting edge of said front knife may be subsequently adjusted at any particular point at which a defect may have developed in use, a knife stock in which the cutter blade of the front knife is secured, a cross lbar carrying said knife stock and set at a slight angle to said cutter

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US121969A 1948-10-21 1949-10-18 Tuft-cutting mechanism for axminster carpet looms Expired - Lifetime US2619987A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2619987X 1948-10-21

Publications (1)

Publication Number Publication Date
US2619987A true US2619987A (en) 1952-12-02

Family

ID=10911875

Family Applications (1)

Application Number Title Priority Date Filing Date
US121969A Expired - Lifetime US2619987A (en) 1948-10-21 1949-10-18 Tuft-cutting mechanism for axminster carpet looms

Country Status (3)

Country Link
US (1) US2619987A (en, 2012)
BE (1) BE491790A (en, 2012)
FR (1) FR997776A (en, 2012)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1849621A (en) * 1929-10-02 1932-03-15 Head Thomas William Tuft cutter
US2379740A (en) * 1944-04-15 1945-07-03 Crompton & Knowles Loom Works Adjustable tuft cutting knife for axminster looms
US2441374A (en) * 1946-02-01 1948-05-11 Crompton & Knowles Loom Works Pile tuft cutter for axminster looms
US2512302A (en) * 1946-10-22 1950-06-20 Brintons Ltd Tuft-cutting mechanism for axminster-carpet and other tuftedfabric looms

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1849621A (en) * 1929-10-02 1932-03-15 Head Thomas William Tuft cutter
US2379740A (en) * 1944-04-15 1945-07-03 Crompton & Knowles Loom Works Adjustable tuft cutting knife for axminster looms
US2441374A (en) * 1946-02-01 1948-05-11 Crompton & Knowles Loom Works Pile tuft cutter for axminster looms
US2512302A (en) * 1946-10-22 1950-06-20 Brintons Ltd Tuft-cutting mechanism for axminster-carpet and other tuftedfabric looms

Also Published As

Publication number Publication date
FR997776A (fr) 1952-01-10
BE491790A (en, 2012)

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