US3525367A - Loom tension control apparatus - Google Patents

Loom tension control apparatus Download PDF

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Publication number
US3525367A
US3525367A US789276A US3525367DA US3525367A US 3525367 A US3525367 A US 3525367A US 789276 A US789276 A US 789276A US 3525367D A US3525367D A US 3525367DA US 3525367 A US3525367 A US 3525367A
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United States
Prior art keywords
fabric
roll
tension
loom
motor drive
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Expired - Lifetime
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US789276A
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English (en)
Inventor
Frederick L Sprague
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Draper Corp
Boeing North American Inc
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North American Rockwell Corp
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Assigned to DELTA ACQUISTION CORPORATION reassignment DELTA ACQUISTION CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ROCKWELL INTERNATIONAL CORPORATION
Assigned to DRAPER CORPORATION, reassignment DRAPER CORPORATION, CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE APRIL 1,1982 Assignors: DELTA ACQUISITION CORPORATION,
Assigned to CITICORP INDUSTRIAL CREDIT INC. reassignment CITICORP INDUSTRIAL CREDIT INC. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DRAPER CORPORATION F/K/A DELTA ACQUISITION CORPORATION
Assigned to STANCHART BUSINESS CREDIT, A CORP. OF CA. reassignment STANCHART BUSINESS CREDIT, A CORP. OF CA. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DRAPER CORPORATION
Assigned to DRAPER CORPORATION, A CORP. OF GEORGIA reassignment DRAPER CORPORATION, A CORP. OF GEORGIA RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CITICORP INDUSTRIAL CREDIT, INC.
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/04—Control of the tension in warp or cloth
    • D03D49/06—Warp let-off mechanisms

Definitions

  • a tension Control apparatus including means for 304-403 selectively controlling the linear rate of warp yarns fed into a loom with cooperating mechanisms for maintaining automati- [56] References C'ted cally a predetermined amount of tension on the warp yarns UNITED STATES PATENTS and fabric formed thereby in the weaving area through to the 2,421,539 6/1947 Clarke 139/1 wind-up of said fabric.
  • the invention relates to looms of the type for weaving a fabric such as tire cord wherein only a sufficient number of picks are inserted therein to serve as a binder for maintaining the desired separation of the warp yarns as well as keeping them in parallel alignment during the process stages of preparing said fabric for its intended purpose.
  • a decrease in tension on the warp yarns and fabric in the weaving area can be very detrimental to the fabric, for during the finishing thereof rubber is bonded to the surfaces of said fabric and then sheared to a specific thickness. If during the period of a decrease in tension on the warp yarns, certain of said yarns should drop below the level of adjacent yarns, they will be displaced when the rubber is bonded to the fabric surfaces. During the shearing process such displaced yarns are sheared off making that particular cut of fabric unfit for its intended purpose.
  • the tension control apparatus provides an improved means for weaving tire cord fabric and its main object is that of eliminating the above disadvantages by providing mechanisms for maintaining automatically a constant amount of tension on the warp yarns and fabric formed thereby in the weaving area as well as in that area of said fabric which extends from the take-up to the windup mechanisms.
  • the present invention utilizes three separate and cooperating electrical motor drive units each of which includes a control that is housed in a single control box common to each of said drive units.
  • the first motor drive is of the adjustable speed type and being correlated to the speed of the loom is adapted to control the linear rate of speed at which the warp yarns are fed into a loom.
  • the second motor drive unit controls the means for rotating the take-up roll and the third the means for rotating the cloth roll upon which the fabric is wound.
  • the controls for both the second and third motor drive units include a means for varying the speed of the motor shafts and being interconnected with the take-up roll and cloth roll respectively, they utilize changes in motor loading to continuously sense and control the speed of said motor drive units to maintain a preset fabric tension level.
  • FIG. 1 is a perspective view of a loom and the cooperating mechanisms for weaving tire cord fabric showing applied thereto the three separate and cooperating electrical motor drive units comprising the means according to the invention for maintaining a desired tension level on the warp yarns and fabric formed thereby.
  • FIG. 2 is a perspective view of a portion of the mechanism in FIG 1 showing on a slightly larger scale the electrical motor drive unit for controlling the feed of warp yarns to a loom.
  • FIG. 3 is a view similar to that of FIG. 2 but showing the motor drive unit for controlling rotation of the take-up roll.
  • FIG. 4 is also a view similar to FIG. 2 but showing the motor drive unit for controlling wind-up of the woven fabric
  • FIG. 5 is a view in diagrammatic form showing by means of indicating arrows the direction of travel the warp yarns and fabric are caused to travel during the weaving process.
  • FIG. 1 which is identified generally by numeral 10 is of conventional design and is not illustrated in its entirety for it is believed enough of the loom and cooperating mechanisms for weaving tire cord fabric have been shown to serve as a basis for a detailed description of the invention.
  • a warp compressor unit having spaced side frames 11 (left hand only shown in FIGS. 1 and 2) which are interconnected adjacent their lower ends by rear and front girt members 12 and 13.
  • a pair of warp yarn delivery rolls l4 and 15 traverse the distance between the side frames 11 and are supported for rotation at the upper ends of the latter on shaft members 16 and 17.
  • These shaft members are journaled in suitable bearing members (not shown) and the ends thereof shown in FIGS. 1 and 2 extend outwardly beyond the left hand side frame 11 and support a pair of spur gears 18 and 19 that are disposed in meshing relation.
  • the delivery rolls l4 and 15 are supported in close proximity with the forward roll 15 being supported at a higher level than its companion roll 14.
  • An electrical motor drive unit 20 provides the means for rotating these delivery rolls and is supported by a motor stand 21 that is attached by any suitable means (not shown) to the side frame 11 (FIGS. 1 and 2).
  • This drive unit 20 is of the adjustable speed type and includes a motor pinion (not shown) that is disposed in meshing relation with spur gear 18.
  • a control station 22 (FIG. 1) is positioned on the forward left hand side of the loom and serves to house the required electrical components for providing power to and control of the motor drive unit 20 as well as the motor drive units for the take-up and wind-up of the fabric which hereinafter will be described in greater detail.
  • a length of conduit 23 (FIG. 1) extending between the motor drive unit 20 and the control station 22 contains the necessary wiring to operate and control said motor drive unit. This drive delivers the warp threads to the loom at a constant linear rate correlated to the speed of the loom for the laying in of the preferred number of picks per inch. By simply turning a control knob 24 in one direction or the other the desired speed of the motor drive unit is obtained.
  • the warp yarns are depicted in FIG. 1 by numeral 25 and as well known to those conversant in the art are drawn from a suitable source of supply (not shown) such as creels or a multiple of warp beams. As shown in FIG. 5, the warp yarns as they are received from their source of supply pass over the top and around the forward portion of the delivery roll 15 thence around the rearward and lower portion of roll 14 from which they extend to the loom in a substantially horizontal plane.
  • a suitable source of supply such as creels or a multiple of warp beams.
  • the warp yarns pass through a common type of stop motion (not shown) and thence through the harnesses one of which is shown and identified in FIG. 1 by numeral 26.
  • Weaving of the warp yarns is conventional, that is to say the reciprocating harnesses form the sheds through which a shuttle 27 is caused to travel for laying in picks of filling yarn.
  • the fabric as it is formed is drawn toward the front of the loom by a take-up roll partially shown and depicted in FIGS. 1 and 3 by numeral 28.
  • the take-up roll is supported for rotation in the conventional manner at the forward and upper portion of the loom and in place of the usual gearing for rotating said roll a separate electrical motor drive unit generally indicated by numeral 29 is provided for that purpose.
  • the motor drive unit 29 is supported by a motor stand 30 that is fixedly attached to a right hand cloth roll stand 31 by any suitable means (not shown).
  • This motor drive unit is located below the take-up roll 28 and includes a gear box reducer 32 on which a driving sprocket 33. partially shown in FIG. 1, is mounted.
  • the take-up roll 28 adjacent its end includes a sprocket 34 fixed thereon which is in vertical alignment with the driving sprocket 33.
  • An endless driving chain 35 (FIGS. 1 and 3) passes about the sprocket 34 on the take-up roll and interconnects the latter with the driving sprocket 33 that is caused to be rotated by the gear box reducer 32 which forms a part of the motor drive unit 29.
  • This motor drive unit provides the means for actuating the take-up roll 28 and includes a cooperating control unit whereby the fabric as it is advanced by said roll is guided and drawn under a predetermined amount of tension.
  • a length of conduit 36 (FIG. I) interconnects the motor drive unit 29 with the control station 22 and contains the necessary wiring to operate and control said drive unit by means of a manually operable knob 37 situated on the upper surface of said control station.
  • Knob 37 forms a part of the control unit that is housed within the control station 22 and includes a means for varying the speed of the motor drive unit shaft (not shown) and through the gear box reducer that is interconnected with the take-up roll 28, the mechanism utilizes changes in motor loading to continuously sense and control the motor speed to maintain a preset fabric tension level.
  • the motor drive unit 29 includes a phase shifting function which permits the drive to run continuously at any speed down to and including stalling without creating any excessive heating up of the motor.
  • the latter feature is particularly advantageous in the event of a loom stop for any progressive increase in fabric tension will cause a cessation of the driving elements and when the loom is ready to resume normal operation, the increased fabric tension will be relieved and the take-up roll will automatically commence rotating to advance the fabric.
  • the fabric is identified in FIGS. 1 and 5 by numeral 38 and as shown diagrammatically in FIG. 5, said fabric is advanced by the upper, forward and lower surfaces of the take-up roll 28 and is then directed generally rearward where it passes about a pressure roll 39. From the pressure roll 39. the fabric 38 is directed forwardly over the forward surface of a guide roll 40 thence downwardly and about the lower and rearward surface of a lower guide roll 41. The fabric is then caused to move in a horizontal plane beneath a weavers platform 42 (FIG. 1) to a wind-up guide roll 43 that directs said fabric to the independently controlled wind-up mechanism now to be described.
  • This wind-up mechanism is indicated generally in FIGS. 1 and 4 by numeral 44 and includes a pair of aligned frame members 45 and 46 disposed in spaced relation.
  • Tie rods 47 (one only shown in FIG. 1) interconnect frame members 45 and 46 adjacent the lower foot portions thereof and the upper ends have fixed thereon upwardly directed and aligned frame extensions 48 and 49 respectively.
  • the frame members support for rotary movement a horizontally disposed driven roll 50 (FIG. 4) or what may be termed a fabric advancing and tension sensing roll.
  • This driven roll is caused to rotate by means of an electrical motor drive unit generally indicated by numeral 51 which is like the drive unit 29 for the take-up roll and is caused to function in a like manner as will be described.
  • a second driven roll 52 is supported for rotary movement by the frame members 45 and 46 and is positioned in close proximity with and immediately forward of the driven roll 50 so that the axis of one roll extends in parallel relation to the other.
  • a wind-up roll or so-called cloth roll 53 (FIG. I) is adapted to be supported by the adjacent upper surfaces of the driven rolls 50 and 52 and the ends of said cloth roll are adapted to be guided for vertical movement in track elements 54 and 55 which form a part of the frame extensions 48 and 49 respectively.
  • These track elements 54 and 55 are formed by vertically disposed bar members 56 and 57 positioned forwardly of the frame extensions 48 and 49 and in spaced relation thereto.
  • the ends of the driven rolls 50 and 52 are shown in FIGS. I and 4 extend outwardly beyond their supporting journal points in the frame member 45 and have fixed thereon sprockets 58 and 59 respectively which are interconnected by an endless driving chain 60.
  • the end of the driven roll 50 extends outwardly a greater distance than that of roll 52 and has fixed thereon an additional sprocket 61 (FIG. 4).
  • An endless driving chain 62 passes about sprocket 61 and interconnects the latter with a driving sprocket (not shown) that is caused to be rotated by a gear box reducer 63 which forms a part of the motor drive unit 51.
  • This motor drive unit 51 is supported by a motor stand 64 that is fixedly attached by any suitable means (not shown) to the side of the frame member 45.
  • a length ofconduit 65 (FIG. I) interconnects the motor drive unit 51 with the control station 22 and contains the necessary wiring to operate and control said drive unit by means of a manually operable knob 66 situated on the upper surface of said control station.
  • Knob 66 forms a part of the control unit that is housed within the control station 22 and serves as a means for varying the motor drive unit shaft (not shown).
  • the gear box reducer 64 which is in driving relation with the driven rolls 50 and 52, the mechanism. like that for the take-up roll, utilizes changes in motor loading to continuously sense and control the motor speed to maintain a preset fabric tension level.
  • drive unit 51 also includes a phase shifting function that permits the drive to run continuously at any speed down to and including stalling without creating any excessive heating up of the motor.
  • the three separate and cooperating electrical drive units can be controlled independently or together and caused to function forwardly or in reverse by the control station 22 located at the forward left side of the loom.
  • These three drive units are tied in with the 12 volt loom stop motion circuit and once weaving begins said three drives start and stop with the loom.
  • the adjustable speed electrical motor drive unit 20 of the warp compressor unit is set to deliver the warp yarns 25 to the loom at a constant linear rate correlated to the speed of the loom for laying in the desired number of picks per inch.
  • the electrical motor drive units 29 and 51 which control the take-up roll and cloth roll respectively set the tension in the fabric. Should a lesser or additional number of picks per inch be desired it is only necessary to change the selective adjustment means for the electrical motor drive unit 20 to coincide with the number of picks desired. In this event, it is not necessary to change the settings of the drive units 29 and 51 for these drives sense the change in tension and automatically compensate to maintain fabric tension.
  • the electrical motor drive unit 29 that drives the loom take-up roll 28 for regulating warp yarn and fabric tension within the weaving area also serves as an anchor in the system and prevents any disturbance of the fell line when the drive unit 51 for the wind-up is reversed or when a roll of fabric is doffed.
  • the three separate electrical motor drive units are of the type such as that furnished by the Vee-Arc Corporation which is located at 50 Milk Street in Westboro, Massachusetts.
  • a tension control apparatus for a loom adapted for independent control of warp yarn and fabric tension during the complete weaving process which comprises:
  • a fabric wind-up mechanism having a cloth roll for receiving said fabric
  • said independent driving member defines an electrical motor drive and a control unit therefor that is influenced by changes in warp yarn and fabric tension to effect reductions in speed of said take-up roll down to a cessation thereof upon indication of progressive increases in tension and to effect increases in speed thereof upon indication of progressive decreases in the tension of said warp yarns and fabric.
  • said further independent driving member defines an electrical motor drive with a control element therefor that is influenced by changes in fabric tension between said take-up roll and wind-up mechanism to effect reductions in speed of said rotatable rolls down to a cessation thereof upon indication of progressive increases in fabric tension and to effect increases in speed thereof upon indication of progressive decreases in fabric tension.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US789276A 1969-01-06 1969-01-06 Loom tension control apparatus Expired - Lifetime US3525367A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78927669A 1969-01-06 1969-01-06

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US3525367A true US3525367A (en) 1970-08-25

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Application Number Title Priority Date Filing Date
US789276A Expired - Lifetime US3525367A (en) 1969-01-06 1969-01-06 Loom tension control apparatus

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US (1) US3525367A (enrdf_load_stackoverflow)
BE (1) BE744052A (enrdf_load_stackoverflow)
BR (1) BR7015797D0 (enrdf_load_stackoverflow)
CH (1) CH504557A (enrdf_load_stackoverflow)
DE (1) DE1965495A1 (enrdf_load_stackoverflow)
FR (1) FR2027793A1 (enrdf_load_stackoverflow)
GB (1) GB1281065A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3884271A (en) * 1973-04-23 1975-05-20 Bond Transmission & Controls I Loom cloth roll take up
US4216804A (en) * 1978-10-02 1980-08-12 Alexander-Cooper, Inc. Loom cloth tension control
US4241764A (en) * 1976-12-03 1980-12-30 Vyzkumny A Vyvojovy Ustav Zavodu Vaseobecneho Strojirenstvi Sand roller control mechanism for looms
US5415207A (en) * 1993-12-22 1995-05-16 Diversified Systems, Inc. Apparatus and method for controlling an off loom take-up
US5572940A (en) * 1994-05-27 1996-11-12 Burton & Noonan Folding and sewing apparatus
US5704304A (en) * 1994-05-27 1998-01-06 Burton & Noonan Level lining apparatus and method
US6196147B1 (en) 1994-05-27 2001-03-06 Perry E. Burton Folding and sewing apparatus
US6450212B1 (en) 2001-07-11 2002-09-17 Diversified Systems, Inc. Solid state web take-up control

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4877247A (enrdf_load_stackoverflow) * 1972-01-24 1973-10-17
US5065796A (en) * 1990-10-02 1991-11-19 Draper Corporation Loom temple control system to vary pick density
CN113406080B (zh) * 2021-06-17 2022-02-25 南通市金山纺织有限公司 一种生产过程中纱线质量检测并控制废线分流的设备

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1013744A (enrdf_load_stackoverflow) *
US2609007A (en) * 1949-05-19 1952-09-02 West Point Mfg Co Positive letoff mechanism for looms
US2820485A (en) * 1952-10-22 1958-01-21 Selles Pedro Cerdans Let-off and take-up for looms
US2811176A (en) * 1955-12-01 1957-10-29 United Merchants & Mfg Large cloth take-up roll for looms
GB1018409A (en) * 1963-11-26 1966-01-26 William Birtwistle Allied Mill Improvements in or relating to horizontal looms for weaving
US3433430A (en) * 1968-05-17 1969-03-18 Marshall John D Fabric windup mechanism

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3884271A (en) * 1973-04-23 1975-05-20 Bond Transmission & Controls I Loom cloth roll take up
US4241764A (en) * 1976-12-03 1980-12-30 Vyzkumny A Vyvojovy Ustav Zavodu Vaseobecneho Strojirenstvi Sand roller control mechanism for looms
US4216804A (en) * 1978-10-02 1980-08-12 Alexander-Cooper, Inc. Loom cloth tension control
US5415207A (en) * 1993-12-22 1995-05-16 Diversified Systems, Inc. Apparatus and method for controlling an off loom take-up
US5572940A (en) * 1994-05-27 1996-11-12 Burton & Noonan Folding and sewing apparatus
US5704304A (en) * 1994-05-27 1998-01-06 Burton & Noonan Level lining apparatus and method
US6196147B1 (en) 1994-05-27 2001-03-06 Perry E. Burton Folding and sewing apparatus
US6450212B1 (en) 2001-07-11 2002-09-17 Diversified Systems, Inc. Solid state web take-up control

Also Published As

Publication number Publication date
DE1965495A1 (de) 1970-07-16
CH504557A (de) 1971-03-15
BR7015797D0 (pt) 1973-01-18
GB1281065A (en) 1972-07-12
FR2027793A1 (enrdf_load_stackoverflow) 1970-10-02
BE744052A (fr) 1970-06-15

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