Apron Type Patents (Class 19/244)
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Patent number: 10428445Abstract: A method includes drawing a roving thread from a roving bobbin through a roving guide, an aft drafting roller, and a mid drafting roller to a front drafting roller, and drawing a spandex core from a spandex bobbin using a guide roller. The method also includes associating the roving thread and the spandex core by drawing the roving thread and the spandex core in an approximately parallel fashion through the front drafting roller, and drawing the associated roving thread and the spandex core through a lappet hook and an anti-ballooning guide. Further, the method includes winding the drawn associated roving thread and the spandex core on a ring-frame bobbin including a ring traveler attached to a rotatable ring. The circular motion of the ring traveler around the ring-frame bobbin causes the drawn associated roving thread to twist around the drawn associated spandex core, forming a core spun yarn.Type: GrantFiled: June 13, 2017Date of Patent: October 1, 2019Inventor: Arun Agarwal
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Patent number: 10357675Abstract: An exercise device, having a pair of supports that rest upon a ground surface and a bridge that extends between the supports and is elevated above the ground surface. The supports each include an upper support that includes an upper tube and a lower support that includes a central post that together telescope so as to adjust the height of the bridge. Handgrips are selectively attachable to the bridge for allowing the user to perform various exercises. The lower supports are each T-shaped, including a base member and each have a pair of lateral supports that are deployable to stabilize the base members from side movement. The upper tubes and bridge are connected with folding joints, and one of the supports includes an offset portion to facilitate selectively bending the supports upwardly against the bridge for compact storage of the device.Type: GrantFiled: May 8, 2017Date of Patent: July 23, 2019Inventor: Brian Katz
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Patent number: 9868259Abstract: A fiber placement system is provided that can include a compaction roller defining a plurality of openings between a roller outer surface and a roller inner surface. The plurality of openings are in fluid communication with a vacuum source. A cover can be included in or on the compaction roller so as to block airflow through a portion of the openings. The fiber placement system can also include a head including a frame and at least one supply spool mounted on the frame. The supply spool is supported on a hub for rotation, and the compaction roller is aligned to receive one or more fiber tows from the at least one supply spool. Methods are also provided for laying a prepreg tow material using automated fiber placement.Type: GrantFiled: September 18, 2015Date of Patent: January 16, 2018Assignee: General Electric CompanyInventors: Mark Ernest Vermilyea, Nicholas Joseph Kray
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Patent number: 9771671Abstract: The invention relates to a double-folding drafting unit, comprising five pairs of rollers, a first, a second, a fourth and a fifth pair of rollers having essentially an identical orientation of the respective axes of the rollers, and a third pair of rollers, which is positioned between the second and the fourth pair of rollers, having an axial direction which is oriented perpendicularly to the axial direction of the other pairs of rollers, an apron being guided in each case around each roller of the first and third pair of rollers and at least one reversing rail assigned to the respective roller, and an apron being guided around each roller of the fourth pair of rollers and around a reversing rail in front of and a reversing rail behind the respective roller. The invention relates, furthermore, to a spin-knitting machine comprising at least two double-folding drafting units.Type: GrantFiled: September 23, 2013Date of Patent: September 26, 2017Inventor: Reinhard König
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Patent number: 9752281Abstract: Fibrous structures having a surface including a plurality of line elements and a method for making same is provided.Type: GrantFiled: October 27, 2010Date of Patent: September 5, 2017Assignee: The Procter & Gamble CompanyInventors: John Allen Manifold, Douglas Jay Barkey, Angela Marie Leimbach, James Allen Cain
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Patent number: 8099835Abstract: The coating of the pressure roller (3) of a drawing roller frame for spinning frames comprises an outer layer and an inner layer fixed to the core of the pressure roller. The outer layer is thinner and harder than the inner layer and is embodied as an endless belt (1) which loosely surrounds the inner layer such that the belt can be displaced in relation to the inner layer. In order to improve the running of the belt, the belt is guided over a deflector rail (2), the cross-sectional area (u) of the rail being wider than the average staple length of the fibre material (F) drawn on the drawing roller frame. Furthermore, the belt is designed in such a way that it comprises a double thread interlining, one thread interlining being wound counter to the second thread interlining such that the threads of one thread interlining cross the threads of the second thread interlining.Type: GrantFiled: January 24, 2007Date of Patent: January 24, 2012Assignee: Deutsche Institute fur Textile-und Faserforschung StuttgartInventors: Peter Artzt, Heinz Muller
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Patent number: 7861434Abstract: A post sleeve installation device includes a standing structure, a structure coupled to the standing structure and configured to support a post sleeve below the standing structure, and a mechanism configured to enable selective translation of the support structure in three axes and rotation around a vertical axis. Locks are provided to lock the post sleeve at a selected position and orientation relative to the standing structure. A beam extending from one installation device to another measures or controls the relative spacing, orientation, and elevation of associated post sleeves, and related data is collected for off-site manufacture of fence panels. Additionally, a repository is provided, to which the data is transmitted for retention, and from which the data can be retrieved for manufacture of replacement fence panels.Type: GrantFiled: March 13, 2009Date of Patent: January 4, 2011Inventor: N. Eric Knudsen
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Patent number: 7624563Abstract: A top roller carrier for drafting systems in spinning machines with at least one pair of feed rollers, one pair of apron rollers and one pair of output rollers as top rollers and with holding devices for the top rollers, and wherein the top rollers are rotatably mounted on the ends of axles which are held centrally between the top rollers. According to the present invention, a common holding device is provided for the axle of the output rollers and the axle of the apron rollers and is movably connected to the top roller carrier and fixes the two axles at a rigid spacing with respect to one another.Type: GrantFiled: November 9, 2005Date of Patent: December 1, 2009Assignee: Accotex-Texparts GmbHInventor: Josef Winter
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Patent number: 7475531Abstract: The invention relates to a drafting device with twin top front rollers surrounded by aprons in which the aprons are guided around deflection members arranged above the area facing away from the clamping surface of the front roller pair. In order to achieve a low-friction, brake-free and low-wear running of the aprons, they are guided with only a slight tension around the deflection members. For this, the tendency of the aprons to assume a circular form in the circumferential direction is utilized. This tendency brings about, with the appropriately selected interval between the top front rollers and between the surfaces of the deflection members, the low contact pressure on the surfaces striven for and the low tractive tension in the aprons striven for.Type: GrantFiled: October 14, 2004Date of Patent: January 13, 2009Assignee: Institut fur Textil-und Verfahrenstechnik Denkendorf der deutschen Institute fur Textil-und FaserforschungInventors: Peter Artzt, Theo Grün, Larisa Ausheyks, Stefan Krawietz
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Patent number: 6988355Abstract: A double-apron drafting unit for spinning machines has a delivery roller pair and an apron pair arranged upstream therefrom. The apron pair guides a fiber strand in the area of a delivery nipping line, with which it forms a wedge-shaped gap. Devices are provided for keeping air currents, which circulate with the delivery roller pair, away from the area of the delivery nipping line, which devices are located outside of the wedge-shaped gap point formed by the delivery nipping line and the apron pair. The devices are, however, located in direct proximity to the delivery roller pair and the apron pair.Type: GrantFiled: April 2, 2004Date of Patent: January 24, 2006Assignee: Maschinenfabrik Rieter AGInventors: Gerd Stahlecker, Nikolaus Schoch
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Patent number: 6604261Abstract: Downstream of the last roller pair of a drafting frame for a spinning machine, the roving is condensed in a fiber-bundling zone having a belt with perforations to which suction is applied. Another belt converges toward the belt with the perforations and engages the roving at a nip spaced from the nip formed by the last roller pair of the drafting frame so that the wedge-shaped converging of the two belts promotes the compacting or condensing action.Type: GrantFiled: June 6, 2002Date of Patent: August 12, 2003Assignee: Zinser Textilmaschinen GmbHInventors: Angelika Stoll, Daniel Friedrich
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Patent number: 6477827Abstract: In order to transport a fiber strand to be pneumatically condensed over a suction slit of a condensing zone of a spinning machine, a transport belt is provided which comprises, at least in the effective area of the suction slit, a porous area. The porous area can, for example, be created by dissolving granulate components from a fine-grained granulate blend.Type: GrantFiled: November 29, 2000Date of Patent: November 12, 2002Inventor: Peter Blankenhorn
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Publication number: 20020059702Abstract: Top making apparatus is attached to a woolen card.Type: ApplicationFiled: November 21, 2001Publication date: May 23, 2002Inventor: Ki-Whan Kim
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Patent number: 6370737Abstract: A drafting equipment is provided with a small double belt for spinning machines with a fiber bundling zone which follows the pair of output rollers of the main drafting field and is followed by a pair of delivery rollers. A pneumatic compression device is provided between the pair of output rollers and the pair of delivery rollers. A pneumatic compression device is provided with a small perforated belt and a suction device extending on the side of the belt away from the fiber sliver and which sucks air through the fiber sliver between the pair of output rollers and the pair of delivery rollers.Type: GrantFiled: July 10, 2000Date of Patent: April 16, 2002Assignee: Deutsche Institute für Textil-und Faserforschung, StuttgartInventors: Peter Artzt, Holger Zoudlik
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Patent number: 6341484Abstract: A sliver compactor is provided between a drafting roller of a drafting frame and the delivery unit which supplies the sliver to the spinning stations of the spinning machine. The sliver compactor has a shielding element juxtaposed with the perforated moving surface to which suction is applied and which reduces the suction force required to draw the fibers of the sliver into a compact form. The shielding element extends over a plurality of slivers and the respective spinning stations and a number of such shielding elements may be aligned over the length of the machine below the stretching field plane and secured on the machine frame.Type: GrantFiled: February 23, 2001Date of Patent: January 29, 2002Assignee: Zinser Textilmaschinen GmbHInventors: Friedrich Dinkelmann, Andreas Olbrich, Peter Artzt, Günter Steinbach
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Patent number: 6338183Abstract: Downstream of a drafting unit of a spinning machine, a condensing zone is provided, in which a drafted fiber strand still in an untwisted state is condensed by bundling. The condensing zone comprises a stationary suction slit, over which the fiber strand to be condensed is transported by an air-permeable transporting element. The suction slit defines the direction of a suction air stream by a guiding edge, which extends diagonally to the direction of motion of the transport element. The air stream positions the fibers of the fiber strand diagonally to the direction of motion of the transport element and so condenses the fiber strand. The suction slit begins with a starting width, which seizes the fiber strand to be condensed in its entire width. Directly downstream thereof the suction slit graduates in the form of a delta into a narrower effective width. The guiding edge continues an edge of the delta without deformation.Type: GrantFiled: October 13, 2000Date of Patent: January 15, 2002Inventor: Kurt Lang
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Patent number: 6332246Abstract: A locating frame for drawing and compacting units of a pair of adjacent spinning stations in a spinning machine where each drawing unit has a pressure roller which supplies the bundle of fibers to the compacting unit and which rotates a pressure roller of the compacting unit, by means of a belt transmission. The frame comprises: two pairs of seats for housing and keeping parallel and spaced apart two axles on which the pressure rollers of the drawing units and the pressure rollers of the compacting units of the two adjacent stations are mounted rotatably, longitudinal arms acting on the axles in order to keep the pressure rollers of the same spinning station aligned longitudinally, and transverse arms for keeping the transmission belts of the two adjacent stations, respectively, aligned with ring gears fixed for rotation with the pressure rollers.Type: GrantFiled: June 7, 2001Date of Patent: December 25, 2001Assignee: Marzoli S.p.A.Inventor: Attilio Camozzi
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Patent number: 6327746Abstract: An endless transport belt transports a drafted fiber strand through a fiber bundling zone. The transport belt is provided with a perforation for a suction air stream which suctions the fiber strand. The transport belt is provided with a sufficiently smooth surface for sliding over a suction device. The transport belt can be in the form of an endless woven or knitted sieve belt or alternatively in the form of an extruded plastic apron having punched out holes.Type: GrantFiled: July 29, 1999Date of Patent: December 11, 2001Assignee: Spindelfabrik Suessen, Schurr, Stahlecker & Grill GmbHInventor: Norbert Barauke
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Patent number: 6318060Abstract: A method and device for the production of core yarn (63), whereby a core yarn (12) is brought to a fiber slubbing (8) which has been refined in a drafting system before said slubbing is reinforced by twisting. The core yarn (12) is embedded in covering fibers. The fiber slubbing is compressed in a compacting device (22) after the core yarn (12) has been brought to the slubbing and before twisting occurs.Type: GrantFiled: March 13, 2000Date of Patent: November 20, 2001Assignee: Zinser Textilmaschinen GmbHInventors: Friedrich Dinkelmann, Andreas Olbrich
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Patent number: 6272834Abstract: A condensing zone is arranged downstream of the drafting apparatus of a ring spinning machine, through which condensing zone an air permeable transport belt transports the drafted fiber strand. A cleaning element is arranged at the transporting element, which cleaning element takes the form of, for example, a cleaning roller, and which is pressed using a light pressure onto the transporting belt. The rotation direction of the cleaning roller preferably runs in the opposite direction to the direction of motion of the transport belt. The driven bottom roller of the front roller pair of the drafting apparatus can serve as a cleaning roller.Type: GrantFiled: May 12, 2000Date of Patent: August 14, 2001Assignee: Spindelfabrik Süssen, Schurr, Stahlecker & Grill GmbHInventor: Norbert Barauke
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Patent number: 6263656Abstract: A condensing zone is arranged downstream of the front roller pair of a drafting arrangement of a spinning machine, in which condensing zone a drafted roving or a sliver is condensed. The condensing zone has a suction device which has a closed hollow profile and which serves as a sliding surface for a circulating sieve belt. The sieve belt transports the drafted fiber strand to a nipping roller, which presses the fiber strand and the sieve belt against the sliding surface at a nipping point. The fiber strand travels over an essentially in transport direction extending suction slit located in the condensing zone, which suction slit extends to the nipping point.Type: GrantFiled: June 20, 2000Date of Patent: July 24, 2001Assignee: Spindelfabrik Suessen, Schurr, Stahlecker & Grill GmbHInventor: Norbert Barauke
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Patent number: 6185790Abstract: A condensing zone for condensing a drafted twist-free fiber strand is arranged downstream of a drafting arrangement of a ring spinning machine. The condensing zone includes a stationary sliding surface having a suction slit extending essentially in a fiber strand transport direction. A perforated transport belt transports the fiber strand over the suction slit of the sliding surface. The transport belt wraps around a bottom roller of a front roller pair of the drafting arrangement and is driven by the bottom roller. The transport belt drives in turn a nipping roller, which limits the condensing zone on its exit side with a nipping point serving as a twist block. The nipping roller presses the fiber strand and the transport belt against the sliding surface of the condensing zone.Type: GrantFiled: July 29, 1999Date of Patent: February 13, 2001Assignees: Fritz StahleckerInventor: Hans Stahlecker
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Patent number: 6161258Abstract: An arrangement for condensing a drafted fiber strand is arranged at each spinning station of a spinning machine. The condensing arrangements each comprise a transport surface which transports the fiber strand over a suction slit of a suction device. A joint suction device having its own fan is provided for a certain number of spinning stations so that differences in underpressure between the individual spinning stations are avoided to a great extent.Type: GrantFiled: August 6, 1999Date of Patent: December 19, 2000Assignees: Fritz Stahlecker, Hans StahleckerInventor: Hans Stahlecker
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Patent number: 6112509Abstract: A drafting equipment is provided with a small double belt for spinning machines with a fiber bundling zone which follows the pair of output rollers of the main drafting field and is followed by a pair of delivery rollers. A pneumatic compression device is provided between the pair of output rollers and the pair of delivery rollers. A pneumatic compression device is provided with a small perforated belt and a suction device extending on the side of the belt away from the fiber sliver and which sucks air through the fiber sliver between the pair of output rollers and the pair of delivery rollers.Type: GrantFiled: February 26, 1998Date of Patent: September 5, 2000Assignee: Inv-Institut fur Textil-und VerfahrenstechnikInventors: Peter Artzt, Holger Zoudlik
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Patent number: 6073314Abstract: A condensing zone is arranged downstream of the front roller pair of a drafting arrangement of a spinning machine, in which condensing zone a ready drafted fiber strand is condensed by means of rolling in the edge fibers before the yarn to be spun is imparted a twist. The condensing arrangement comprises a sliding surface having a suction slit extending essentially in a fiber strand transport direction, as well as a perforated transport belt which transports the fiber strand over the sliding surface and the suction slit. The sliding surface is the outer contour of a hollow profile, to which a suction device is connected. The transport belt consists of such a thin material that the fiber strand is disposed on the sliding surface and the suction slit at practically no distance thereto. The transport belt is preferably made from polyamide multifilament yarns.Type: GrantFiled: June 29, 1999Date of Patent: June 13, 2000Assignee: Spindelfabrik Suessen, Schurr, Stahlecker & Grill GmbHInventor: Norbert Barauke
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Patent number: 6029318Abstract: A drafting frame for a spinning machine has a compaction unit at the downstream end of the drafting path which can be removed and other rollers and belts of the upper and lower arrays can be advanced as required to maintain the length of the paths of the sliver.Type: GrantFiled: December 15, 1998Date of Patent: February 29, 2000Assignee: Zinser Textilmaschinen GmbHInventor: Friedrich Dinkelmann
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Patent number: 5918456Abstract: A rail for supporting and guiding the lower belt of a drafting frame of a textile machine is provided with a coating of one or more of aluminum oxide, titanium dioxide, chromium oxide or molybdenum oxide in an oxide ceramic powder with a hardness of 800 to 1500 HV and a grain size of 45 to 5 .mu.m. A pressing arm urges the stand against its belt.Type: GrantFiled: December 1, 1997Date of Patent: July 6, 1999Assignee: Zinser Textilmaschinen GmbHInventor: Gerhard Darcis
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Patent number: 5638580Abstract: Worsted grade all-wool of fair quality can be spun on cotton spinning system. Wool top is processed at first passage of cotton drawing frame instead of gill, with cutting and drafting with suitable distance between front and third rollers. Second and back top rollers are removed so that wool sliver which is more uniform and which has a shorter staple length distribution can be processed with roller drafting only. The second to last passage is processed with the same distance between the front and third roller as the first passage and also has the second and back top rollers removed. The sliver is fed through three (3) pairs of the rollers and one pair of aprons of a cotton roving frame, the draft is the same distance as the first passage of drawing process between front and back rollers and uses an engraved middle top roller. Yarn is spun on a cotton ring frame by drafting the fed roving through three pairs of rollers and one pair of aprons.Type: GrantFiled: January 11, 1996Date of Patent: June 17, 1997Assignee: Hanol Spinning Co., Ltd.Inventor: Ki Whan Kim
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Patent number: 5600872Abstract: A process and device for bundling a fiber composite which has been drafted in a drafting device having a pair of output rollers and a pair of delivery rollers gathers together the fiber composite leaving the pair of output rollers in a fiber bundling zone. The fiber composite is conveyed through the fiber bundling zone and supported through the fiber bundling zone on one side by a conveying plane which moves in the direction of conveyance of the fiber composite. A suction air stream is drawn through the fiber bundling zone at substantially a right angle to the conveying direction of the fiber composite. The suction air stream causes the gathering together of the fiber composite in the bundling zone at a width substantially equal to a desired width of the fiber composite.Type: GrantFiled: November 1, 1995Date of Patent: February 11, 1997Inventors: Peter Artzt, Martin Conzelmann
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Patent number: 5553357Abstract: A high bulky wool spun yarn for knitting or weaving, which has high bulky properties formed by bulky loops in the bundle of the yarn, and a drafting system for making the same is provided. The drafting system includes a spinning machine with an improved front top roller that periodically changes the contacting points of a wool roving to form uniform bulky loops in a bundle of a wool spun yarn, thereby forming the high bulky wool spun yarn. Multiple grooves which are perpendicular to the axis of the top roller are formed on the surface of the top roller. Additionally, multiple slanting grooves which are slanted at about 45.degree. to the axis of the top roller or to the multiple grooves are formed on the surface of the top roller. Abrasion resistant fillers are inserted and fixed in the multiple slanting grooves.Type: GrantFiled: January 3, 1995Date of Patent: September 10, 1996Assignee: Cheil Industries, Inc.Inventors: Kun-hye Kim, Soo-ho Son, Young-huy Yoon, Chang-jig Lee
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Patent number: 5531063Abstract: A device for forming core/wrap yarn is provided in which a core strand and one or more wrap strands are passed from the nip of a pair of rollers to a stationary support surface which is outwardly, downwardly curved and which includes an open channel therein; wherein the core strand is passed through the channel from the nip and the wrap rovings are passed from the nip to converge upon and wrap around the core strand in the channel to form wrapped yarn; wherein the support surface may be moved from its operative position to a second position to allow a second mode of operation absent the support surface and wherein the support surface is tapered from the outer edges toward the channel.Type: GrantFiled: February 14, 1994Date of Patent: July 2, 1996Assignee: The United States of America as represented by the Secretary of the Department of AgricultureInventors: A. Paul S. Sawhney, Craig L. Folk
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Patent number: 5465465Abstract: A two-apron drafting unit comprises at least one sliver guide which projects into the wedge-shaped gap of the roller pair which follows the apron unit. The sliver guide has a defined distance from the surfaces of the roller pair and can be moved within certain limits in the longitudinal direction of the roller pair. The sliver guide is arranged in a holding device which is aligned in parallel to the roller pair as well as with respect to the height of the drafting zone plane. The holding device, which has a slideway for the sliver guide, is arranged on a supporting part which is connected with the lower deflection guide for the bottom apron.Type: GrantFiled: June 15, 1993Date of Patent: November 14, 1995Assignee: Hans StahleckerInventor: Fritz Stahlecker
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Patent number: 5335397Abstract: In the case of a two-apron drafting unit for spinning machines, it is provided for the parallel alignment of the top apron cradle and of the pressure roller twin guided by it with respect to the pertaining bottom cylinder that the pressure roller holder arranged in the load carrier only takes over the function of providing the load and the lateral guiding. The parallel alignment of the apron cradle is caused by a preferably L-shaped stop against which the apron cradle will be placed. The shaft of the pressure roller twin is unguided in the radial direction in the pressure roller holder.Type: GrantFiled: June 15, 1993Date of Patent: August 9, 1994Assignees: Hans Stahlecker, Fritz StahleckerInventor: Fritz Stahlecker
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Patent number: 5022123Abstract: A draft mechanism for use on a spinning machine includes a series of roller pairs each including a bottom roller and a top roller. The roller pairs are connected to output shafts of motors through the use of timing belts. The motors are electrically controlled according to the draft ratios. Roller gauge adjusting shafts are meshed with bearing portions of the top and bottom rollers.Type: GrantFiled: September 28, 1989Date of Patent: June 11, 1991Assignee: Murata Kikai Kabushiki KaishaInventors: Yutaka Ueda, Hideshi Mori, Manzo Tanaka
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Patent number: 5014398Abstract: In a high-draft drafting unit for a spinning machine having several drafting zones which are each delimited by pairs of rollers, it is provided that the working width of the pairs of rollers in the travel direction of the silver is reduced in one or several steps.Type: GrantFiled: February 23, 1990Date of Patent: May 14, 1991Assignees: Fritz Stahlecker, Hans StahleckerInventors: Fritz Stahlecker, Hans Stahlecker
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Patent number: 4991388Abstract: A draft device in a spinning machine comprising a pair of back rollers, a pair of middle rollers each provided with an apron belt, and a pair of front rollers. An outer peripheral part of the driving-side of middle roller is formed of a rubber.Type: GrantFiled: August 31, 1988Date of Patent: February 12, 1991Assignee: Murata Kikai Kabushiki KaishaInventor: Hisaaki Kato
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Patent number: 4976096Abstract: A core wrap system is provided in which a core strand and wrap strands spaced from said core strand on each side of said core strand are passed from the nip of a pair of rollers to a stationary support surface that is outwardly, downwardly curved, and which includes an open channel therein which is outwardly, downwardly curved along the surface; wherein the core strand is passed through the channel from the nip; wherein the wrap rovings are passed from the nip to converge upon and wrap around the core strand in the channel to form wrapped yarn in the channel; and wherein wrapped yarn then is passed through a ring traveler to a wind-up spindle.Type: GrantFiled: June 15, 1989Date of Patent: December 11, 1990Assignee: The United States of America as represented by the Secretary of AgricultureInventors: A. Paul S. Sawhney, Craig L. Folk, Kearny Q. Robert
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Patent number: 4972555Abstract: In the case of a drafting unit for spinning machines, it is provided that the bottom roller and the pressure roller of a pair of delivery rollers have smaller diameters than the preceding pair of rollers, and that the pressure roller of the pair of delivery rollers is designed to have a smaller diameter than the pertaining bottom roller.Type: GrantFiled: March 12, 1990Date of Patent: November 27, 1990Assignees: Fritz Stahlecker, Hans StahleckerInventors: Fritz Stahlecker, Hans Stahlecker
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Patent number: 4972554Abstract: In the case of a drafting unit for a spinning machine, it is provided that the pressure roller and the bottom roller of the pair of delivery rollers have a smaller diameter than the pressure roller and the bottom roller of the preceding pair of rollers, and in that the thickness of the covering of the pressure roller of the pair of delivery rollers amounts to at least approximately 4 mm. The bottom roller of the pair of delivery rollers has a profiling, the depth of which is no larger than 0.4 mm.Type: GrantFiled: March 5, 1990Date of Patent: November 27, 1990Assignees: Fritz Stahlecker, Hans StahleckerInventors: Fritz Stahlecker, Hans Stahlecker
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Patent number: 4967547Abstract: In the case of a drafting unit for a spinning machine having a drafting zone, which is delimited by two pairs of rollers each consisting of top rollers and bottom rollers and in which an apron guide is located, it is provided that the diameter of at least the bottom roller of the following pair of rollers is smaller than the diameter of the bottom roller of the preceding pair of rollers.Type: GrantFiled: July 14, 1989Date of Patent: November 6, 1990Assignee: Fritz and Hans StahleckerInventor: Fritz Stahlecker
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Patent number: 4920736Abstract: In an arrangement for interrupting the operation of an individual drafting frame at a spinning machine, devices are provided for reducing the contact of a sliver with the bottom rollers and particularly for lifting the sliver off the bottom rollers which are operative when the pressure rollers are lifted off the bottom rollers.Type: GrantFiled: September 9, 1988Date of Patent: May 1, 1990Assignee: Hans StahleckerInventor: Fritz Stahlecker
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Patent number: 4901517Abstract: An improved apparatus for the drafting section of ring spinning frames is disclosed. The apparatus includes a front cot roll apron which permits the apparatus to be operated at higher than normal draft ratios without sacrificing spinning performance or product uniformity.Type: GrantFiled: July 17, 1989Date of Patent: February 20, 1990Assignee: Monsanto CompanyInventor: Don E. Fisher
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Patent number: 4894886Abstract: A blended yarn producing device includes a draft device having back rollers, middle rollers and front rollers and a twisting device succeeding the draft device, which is constituted such that a trumpet guide for introducing slivers of different types separately at upper and lower locations is located on the sliver entrance side of the back roller.Type: GrantFiled: September 16, 1987Date of Patent: January 23, 1990Assignee: MurataKikai Kabushiki KaishaInventor: Toshifumi Morihashi
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Patent number: 4727626Abstract: An improved fiber control for an apron drafting system of a spinning frame is disclosed which includes a rear pair of rolls (3, 6) a middle pair of rolls (2, 5), and a front pair of rolls (1, 4). A silver guidance zone is formed between upper apron 8 and lower apron 11 around rolls 5 and 2, respectively by which sliver is guided in a prescribed path. The guidance path may be configured especially to the fiber type and length by transverse projection elements (17, 18, 19) which engage lower apron 11 and are displaceable. The projection elements are displaceable perpendicular to and along the length of the sliver guidance zone and may be made to contact lower apron 11 to provide a desired shape for control of the sliver.Type: GrantFiled: December 16, 1985Date of Patent: March 1, 1988Assignee: Platt Saco Lowell S.A.Inventor: D. Ricardo M. Vinas
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Patent number: 4718225Abstract: An improved pneumatic spinning machine of the type which includes a draft device composed of a plurality of pairs of rollers, and an air injecting nozzle for producing whirling flows of air to act upon a bundle of fibers fed from the draft device. A front roller of the draft device has an annular air escaping groove formed on a circumference thereof.Type: GrantFiled: June 27, 1986Date of Patent: January 12, 1988Assignee: Murata Kaiki Kabushiki KaishaInventor: Asao Sanagi
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Patent number: 4692967Abstract: A textile fiber drafting apron and method of manufacture, wherein the apron is free of cord reinforcement and is formed of a single extruded layer of material. The outer fiber working surface has a smoothness comparable to conventional ground surface, and is expressed in terms of average depth of remaining depressions, as measured on a standard measuring device.Type: GrantFiled: May 25, 1982Date of Patent: September 15, 1987Assignee: Day International CorporationInventors: John J. Dolan, Charles Dye
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Patent number: 4680833Abstract: A drafting apparatus for roving or sliver, designed for high speed pneumatic spinning machines. The drafting apparatus comprises inlet and outlet drawing pairs of rollers as well as pair of endless aprons. The upper drawing roller of the outgoing drawing pair of rollers is offset angularly about the axis of the lower drawing roller, towards the closest pair of endless aprons. The angle of offset of the upper drawing roller is from 15.degree. up to 65.degree.. The advantage of the drawing apparatus according to the invention is that impairment of the roving by the air flow around the outgoing pair of drawing rollers is avoided because of the offset of the upper drawing roller about the axis of the lower drawing roller towards the drawing aprons.Type: GrantFiled: May 9, 1986Date of Patent: July 21, 1987Assignee: NPK "Textiling Maschinostroene"Inventors: Dinko A. Bahov, Hristo A. Bahov
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Patent number: 4644609Abstract: In order to make possible automatic restart of a spinning machine drafting frame after strand breakage in an easy way, a movable blocking member is insertable between the drive roller of the lower feed belt and the lower feed belt in the direction of the line of contact of the lower feed belt and the drive roller, this blocking member on engagement raising the lower belt from its drive roller by operation of a connecting rod attached pivotally to the detent member. Additional roller pairs present upstream of the feed belts are preferably provided with means for simultaneously lifting the various upper rollers from the lower rollers with or without holding the yarn or thread fixed on engagement of the detent member.Type: GrantFiled: February 4, 1985Date of Patent: February 24, 1987Assignee: Zinser Textilmaschinen GmbHInventor: Manfred Lattner
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Patent number: 4630434Abstract: A draw frame for a spinning machine is provided with roving blocking mechanism associated with its inlet rollers actuable on rupture of the remittant thread to arrest movement of the roving and is further provided with a sensor for detecting the continuity of the roving being fed from a source of supply and a roving clamp situated between the sensor and the blocking mechanism. The blocking mechanism and the roving clamp are arranged to be simultaneously operated in response to a signal from the sensor or in response to rupture of the thread.Type: GrantFiled: January 23, 1985Date of Patent: December 23, 1986Assignee: SKF Textilmaschinen-Komponenten GmbHInventors: Max Hartmannsgruber, Michael von Ronai-Horvath, Kurt Seebo, Bernhard Schoenung
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Patent number: 4615170Abstract: A roving of short fibers is converted to a continuous twisted thread by a device which grips the roving between the facing teeth of two endless belts, and an acoustically generated transverse air jet is directed at the side of the roving, at a fixed point situated between the two belts. The direction of the air jet is reversed each time the fixed point is passed either a pair of facing teeth, or the midpoint in the gap between two successive pairs of facing teeth.Type: GrantFiled: August 15, 1985Date of Patent: October 7, 1986Assignee: InteractionInventor: Jean-Jacques Walter