US3150419A - Magnetically weighted pressure rolls - Google Patents

Magnetically weighted pressure rolls Download PDF

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Publication number
US3150419A
US3150419A US226936A US22693662A US3150419A US 3150419 A US3150419 A US 3150419A US 226936 A US226936 A US 226936A US 22693662 A US22693662 A US 22693662A US 3150419 A US3150419 A US 3150419A
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US
United States
Prior art keywords
roll
magnetic
rolls
shell
magnet
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
US226936A
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English (en)
Inventor
Christoph W Aurich
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.)
Maremont Corp
Original Assignee
Maremont Corp
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 Maremont Corp filed Critical Maremont Corp
Priority to US226936A priority Critical patent/US3150419A/en
Priority to DES85926A priority patent/DE1169814B/de
Priority to CH821963A priority patent/CH426571A/de
Priority to ES0292030A priority patent/ES292030A1/es
Application granted granted Critical
Publication of US3150419A publication Critical patent/US3150419A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/46—Loading arrangements
    • D01H5/54—Loading arrangements using magnetic arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S100/00—Presses
    • Y10S100/917—Magnetic

Definitions

  • This invention relates to rolls used in applying pressure to material moving thereagainst, such as drafting rolls, calendering rolls and the like. More particularly the invention relates to constructions and means of a magnetic nature for weighting such rolls in order to apply pressure to material passing between a pai-r of rolls.
  • the invention is useful in drawing mechanisms of the type used in tex-tile machines such as spinning, roving, drawing frames, comber draw boxes and the like, where pressure is applied to fibrous material passing between pairs of rolls.
  • the invention also may be applied in analogous paper making or processing machines where pressure is applied by rolls to sheets or webs of stock passing between the rolls, such as couch rolls, press rolls, calenders and the like.
  • each of these mechanisms one or both of a pair of cooperating rolls is rotatably driven to carry material between the rolls, and pressure is applied between the rolls sufiicient to cause the necessary drafting, calendering or other pressure treatment of the material for which the mechanism is designed.
  • weights, springs, levers and hydraulic or pneumatic pressure systems often are used to weight the upper roll or lift the lower roll in a pair in order to apply the desired pressure between the rolls
  • the present invention does not relate to such weighting arrangements with their attendant difficulties and problems but relates to improvements in the magnetic weighting of rolls.
  • magnetic weighting one or both rolls of as many pairs as may be desired consists of or includes a magnet, the rolls being so associated that the magnetic force pulling them together applies sufficient pressure between them. No weights, springs, levers or like mechanisms for weighting ⁇ the rolls are therefore required.
  • the shells, the magnets and the pole pieces must be provided with structures holding the parts together, on or by which the gudgeons or journals for rotatably supporting the rolls can be dependably secured, and sometimes resilient cots or coverings must be mounted on such rolls.
  • One object of the present invention is to provide magnetic rolls for the purposes described which are simple in construction, easy to manufacture, compact, solid, and which may be made in smaller diameters, of greater length and of lighter weight than magnetically weighted rolls previously available. Another object is to provide such rolls in which, by magnetic forces, higher pressures and 3 l 5 ,4 l 9 Patented Sept. 29, l 964 larger spacings between rolls may be obtained for the treatment of heavier slivers or webs of material than heretofore. A further object is to provide improved srtuctures in such rolls for securing supporting journals thereto and for mounting cots thereon.
  • the principal objects of the invention are met generally by eliminating the usual non-magnetic or diamagnetic tubes or sleeves surrounding the magnets and pole pieces in the rolls, and providing a strong, thin-walled tube, sleeve or cylindrical shell of steel or similar magnetic, i.e. ferrous, magnetizable, material.
  • a sleeve of such magnetic material would seem unduly to reduce the reluctance of the magnetic circuit, adding undesirable leakage, it has been found that by using a highly permeable material and by keeping the shell wali as thin (small in cross-section) as practically possible, by magnetically saturating the sleeve, considerable reluctance is provided, minimizing the leakage flux or flux loss.
  • Good results are obtained using dimensions and proportions acceptable in equipment of the type here involved with the shell cross-sectional area reduced to a minimum compatible with required mechanical strength characteristics. Simplified construction of the roll is possible, as hereafter described, by virtue of the character of the shell material.
  • FIG. 1 is a front elevational view of a set of drawing rolls embodying one form of this invention
  • FIG. 2 is a vertical sectional view of a set of drawing rolls according to another form of this invention.
  • FIG. 3 is a front elevational view, partly in section, of a set of calendering rolls embodying the invention
  • FIG. 4 is an enlarged vertical sectional view through the end of one of the top rolls in the form of FIG. l;
  • FIG. 5 is a similar enlarged sectional View of the end ofthe top roll in the form of FIG. 2, and
  • FIG. 6 is a corresponding enlarged sectional view through the end of Ithe bottom roll in the form of FIG. 2.
  • Drafting mechanisms of the type shown in FIG. 1 include a series of top rolls 10, shown in detail in FIG. 4, and a single bottom roll or shaft 12 suitably rotated by a drive (not shown) in a manner well known.
  • Protuberant annular bosses of resilient material, 14, also sometimes called cots or covers, are provided on the top rolls and receive power from the rotating bottom rolls by contact with areas of fine fluting or ribs 16 on the bottom roll.
  • the cooperating cots and fluted sections produce a continuously uniform bite or nip and conform to the sllape of a sliver or other fibrous material fed between t ern.
  • the upper rolls in this form are provided with gudgeons 20 at their ends journaled in slots in cap bars 22 as is usual in this type of drafting mechanism.
  • the driven lower roll or shaft is suitably supported and journaled as in a roll stand at 18.
  • each of the top rolls in the form of FIGS..
  • l and 4 is provided with and consists principally of a permanent magnet 2S of cylindrical form, which, according to this invention, is closely surrounded by a, uniformly thin shell 30 of steel or similar structurally strong metal capable of being magnetized.
  • a pole piece is provided which preferably is secured directly to or fabricated integrally with one of the gudgeons Ztl.
  • the pole pieces preferably of soft steel, are pressed and secured tightly within the ends of the cylindrical shell and against the magnet ends by spinning over or rolling the edges of the shell, by welding, or in some other suitable ⁇ fashion as at 34.
  • the cots 1li above mentioned are secured as by slipped over the gudgeons and cemented or otherwise lirmly secured to rotate simultaneously with the rest of the top roll.
  • the bottom roll or shaft 12 in this form may be made entirely of magnetic steel so that the magnetic iiux from the pole pieces at the ends of the magnet attracts each top roll toward the bottom roll shaft with the proper weight or pressure.
  • the cross section of the steel shell of the top roll is made thin enough, magnetic saturation is readily achieved and a condition of reluctance is created whereby the loss due to leakage through the shell from pole piece to pole piece is minimized.
  • Highly oriented magnets like those sold under the name ALNICO V have been found to be eminently satisfactory in rolls according to this invention even though such magnets are relatively low in mechanicalor structural strength.
  • the thin tubular sleeve of magnetic steel provides the necessary structural strength without, however, producing objectionable iiux loss due to leakage, and constitutes the sole element supporting and holding together the magnet, p ole pieces and roll-supporting gudgeons. Note that the shell is of uniform cross-section through its length, having no weak spots.
  • This basic roll construction lends itself also to the use of more than one magnet, and a plurality of magnets can be used aligned end to end as shown in FlGS. 2 and 3, making it possible to employ magnetic weighted rollers of small diameter but of great length.
  • a single elongated top roll ltb shown in detail in FlG. 5, is provided with a rubber or similar resilient cot or covering 14h extending its full length. Gudgeons 2Gb and end pole pieces ZltrareV provided, closing the ends of a thin steel tube or sleeve 3% in which a plurality of magnets 28a are closely fitted.
  • the p ole ⁇ pieces are secured Within the shell as at 3412 in some suitable fashion such as was previously mentioned in connection with the embodiment shown in FIGS. l and 4. Between the ends of the several magnets in this roll an intermediate pole piece 2da is mounted, such intermediate pole pieces being in the form of a disk closely iitting the tube and against the magnet ends, the adjacent poles of the magnets in the roll both being of the same polarity so that a series of magnetic elds is provided along the roll.
  • the drive shaft or bottom roll 12b shown in detail in FIG. 6, may be made of magnetic steel as in the first form illustrated and described but with the liuting 16h extended for the entire length of the roll to match the full length cot 14h on the top roll.
  • magnets 28h may be provided in the bottom roll as shown, these magnets being closely surrounded by a thin walled steel shell 32h on which the tintes lob are formed or provided.
  • End pole pieces 24h are secured to the drive shaft ends 12b, as at 34C in a suitable fashion such as was previously described in connection with the other embodiments, and an intermediate pole piece 26h in the bottom roll is positioned opposite corresponding pole piece 26a in the top roll when a plurality of magnets is used in both the bottom and top roll. As shown, the polarity position of the magnets in the bottom roll is reversed from that of the magnets in the top roll in this double magnetic roll assembly and greatly increased pressures or weights may be obtained with this arrangement.
  • the form of invention illustrated in FIG. 3 includes a bottom roll or shaft 12C containing magnets 23e, end pole pieces 24e and an intermediate pole piece 26C, all manufactured and assembled like the bottom roll of FIG. 2, but without any fluting on the outside of the steel shell 32e.
  • a smooth hard surfaced top roll lil@ which may be made of solid Steel with gudgcons Ztlc.
  • this top roll might be a shell, provided with internal magnets and pole pieces in much the same fashion as the top roll of FiG. 2, but Without a resilient covering or cot.
  • the invention may be applied to roll sets where either the top or bottom roll or both rolls contain magnets.
  • resilient cots may be employed and the steel sleeve or tubing containing the magnets can carry iiutings of known cross section to increase the grip, but plain surfaces also may be provided.
  • the steel sleeve or tubing containing the magnets can carry iiutings of known cross section to increase the grip, but plain surfaces also may be provided.
  • there is a certain leakage iux through the steel tubing from pole piece to pole piece if the wall of the tubing is thin enough and is magnetically saturated, the permeability of the sleeve is lowered and makes available a high percentage of useful flux for attracting either nonmagnetized ferrous or magnetized companion rolls.
  • a magnetic pressure roll set comprising a first roll with cylindrical permanent magnet means therein
  • a second roll of magnetic character rotatably mounted next to said first roll for pressure-creating cooperation therewith by influence of magnetic liuX from the said magnet and pole pieces of said first roll,
  • said shell in said first roll is of magnetic material of such thin cross-section that said permanent magnet means maintains said shell in magnetically saturated condition, suflicient reluctance thereby being pro,- vided minimizing magnetic flux loss from pole piece to pole piece and said shell containing said magnet and pole pieces and constituting structural support of the same in said roll and of said roll in its mounting.
  • That improvement in a magnetic pressure roll set as claimed in claim 1 wherein the means rotatably mounting said first roll comprises a pair of gudgeons integral with said pole pieces at the ends of said roll.
  • a roll set as claimed in claim 1 in which said rolls are calendering rolls and both rolls are provided with cooperating hard, smooth outer surfaces to calender material passing between said rolls.
  • a magnetic pressure roll for the purposes described comprising an outer hollow cylindrical shell of uniform thin crosssection
  • permanent magnet means including at least one cylindrical magnet closely fitted within said outer shell,
  • said shell constituting structural support of said magnet and pole piece disks in the shell and being of ferromagnetic material of such said uniform thin crosssection that said permanent magnet means maintains said shell in magnetically saturated condition, suicient reluctance thereby being provided minimizing magnetic flux loss from pole piece disk to pole piece disk in the shell.
  • a pressure roll as claimed in claim 6 including a pair of outwardly extending gudgeons, one on each of said pole piece disks, for rotatably supporting said roll at its ends.
  • a pressure roll as claimed in claim 8 in which each of said gudgeons is formed integrally with a said pole piece disk.
  • a magnetic pressure roll set comprising a iirst roll with cylindrical permanent magnet means therein,
  • a second roll of magnetic character rotatably mounted next to said first roll for pressure-creating cooperation therewith by influence of magnetic flux from the said magnet and pole pieces of said rst roll,
  • said shell in said first roll is of ferrous material of such thin cross-section that said permanent magnet means maintains said shell in magnetically saturated condition, sucient reluctance thereby being provided minimizing magnetic flux loss from pole piece to pole piece and said shell containing said magnet and pole pieces and constituting the sole structural support of the same in said roll and of said roll in its mounting.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Paper (AREA)
US226936A 1962-09-28 1962-09-28 Magnetically weighted pressure rolls Expired - Lifetime US3150419A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US226936A US3150419A (en) 1962-09-28 1962-09-28 Magnetically weighted pressure rolls
DES85926A DE1169814B (de) 1962-09-28 1963-06-29 Magnetische Streckwalze in einer Streckwalzen-anordnung fuer Spinnereimaschinen
CH821963A CH426571A (de) 1962-09-28 1963-07-03 Magnetisches Druckwalzenpaar
ES0292030A ES292030A1 (es) 1962-09-28 1963-09-27 Perfeccionamientos en maquinas textiles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US226936A US3150419A (en) 1962-09-28 1962-09-28 Magnetically weighted pressure rolls

Publications (1)

Publication Number Publication Date
US3150419A true US3150419A (en) 1964-09-29

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US226936A Expired - Lifetime US3150419A (en) 1962-09-28 1962-09-28 Magnetically weighted pressure rolls

Country Status (4)

Country Link
US (1) US3150419A (de)
CH (1) CH426571A (de)
DE (1) DE1169814B (de)
ES (1) ES292030A1 (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3239869A (en) * 1962-06-18 1966-03-15 Nitto Boseki Co Ltd Magnetically held lint clearer rolls
US3364545A (en) * 1965-09-16 1968-01-23 Gunter & Cooke Inc Magnetic roll structure
US3433398A (en) * 1967-04-10 1969-03-18 Armco Steel Corp Magnetic bridle unit for winding steel strip
US3599305A (en) * 1970-04-29 1971-08-17 Christoph W Aurich Magnetic shunt roll assembly
US4062097A (en) * 1975-12-31 1977-12-13 Valmet Oy Roll having magnetic deflection compensation
US4631794A (en) * 1982-12-14 1986-12-30 Valmet Oy Apparatus and method for eddy current heating a roll in a paper machine
US4679390A (en) * 1985-02-22 1987-07-14 Wm. R. Stewart & Sons (Hacklemakers) Limited Opening roller assemblies for open end spinning machines
US5392702A (en) * 1989-02-15 1995-02-28 Bellmatic, Ltd. Magnetic rolling system having rollers with laminated ply units disposed therein
US5448803A (en) * 1994-03-17 1995-09-12 Hollingsworth Saco Lowell, Inc. Magnetic roller
US5861692A (en) * 1998-02-24 1999-01-19 Eastman Kodak Company Magnetically induced coupling and drive apparatus
US5987291A (en) * 1997-05-06 1999-11-16 Fuji Xerox Co., Ltd. Image forming apparatus and a sheet carrying apparatus
US6034457A (en) * 1998-12-28 2000-03-07 Eastman Kodak Company Magnetic drive apparatus for web transport
CN103556318A (zh) * 2013-11-07 2014-02-05 昆山市申力毛纺有限公司 用于并条机中的压辊组
CN103590149A (zh) * 2013-11-07 2014-02-19 昆山市申力毛纺有限公司 具清洁装置的并条机压辊组
CN103590148A (zh) * 2013-11-07 2014-02-19 昆山市申力毛纺有限公司 清洁低耗的并条机压辊组

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028786A (en) * 1974-10-08 1977-06-14 Canathane Roller Corporation Limited Printing and like rollers
DE102012103610A1 (de) * 2012-04-25 2013-10-31 Rieter Ingolstadt Gmbh Textilmaschine mit wengistens einer mehrere magnetische Bereiche aufweisenden Belastungswalze

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686940A (en) * 1947-08-28 1954-08-24 Saco Lowell Shops Textile drawing mechanism
US2951266A (en) * 1956-01-30 1960-09-06 Saco Lowell Shops Drafting mechanism
GB878256A (en) * 1958-12-24 1961-09-27 Saco Lowell Shops Improvements in or relating to fibre-drafting mechanisms
US3079646A (en) * 1959-07-20 1963-03-05 Saco Lowell Shops Magnetic drafting mechanism

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686940A (en) * 1947-08-28 1954-08-24 Saco Lowell Shops Textile drawing mechanism
US2951266A (en) * 1956-01-30 1960-09-06 Saco Lowell Shops Drafting mechanism
GB878256A (en) * 1958-12-24 1961-09-27 Saco Lowell Shops Improvements in or relating to fibre-drafting mechanisms
US3079646A (en) * 1959-07-20 1963-03-05 Saco Lowell Shops Magnetic drafting mechanism

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3239869A (en) * 1962-06-18 1966-03-15 Nitto Boseki Co Ltd Magnetically held lint clearer rolls
US3364545A (en) * 1965-09-16 1968-01-23 Gunter & Cooke Inc Magnetic roll structure
US3433398A (en) * 1967-04-10 1969-03-18 Armco Steel Corp Magnetic bridle unit for winding steel strip
US3599305A (en) * 1970-04-29 1971-08-17 Christoph W Aurich Magnetic shunt roll assembly
US4062097A (en) * 1975-12-31 1977-12-13 Valmet Oy Roll having magnetic deflection compensation
US4631794A (en) * 1982-12-14 1986-12-30 Valmet Oy Apparatus and method for eddy current heating a roll in a paper machine
US4679390A (en) * 1985-02-22 1987-07-14 Wm. R. Stewart & Sons (Hacklemakers) Limited Opening roller assemblies for open end spinning machines
US5392702A (en) * 1989-02-15 1995-02-28 Bellmatic, Ltd. Magnetic rolling system having rollers with laminated ply units disposed therein
US5448803A (en) * 1994-03-17 1995-09-12 Hollingsworth Saco Lowell, Inc. Magnetic roller
US5987291A (en) * 1997-05-06 1999-11-16 Fuji Xerox Co., Ltd. Image forming apparatus and a sheet carrying apparatus
US5861692A (en) * 1998-02-24 1999-01-19 Eastman Kodak Company Magnetically induced coupling and drive apparatus
US6034457A (en) * 1998-12-28 2000-03-07 Eastman Kodak Company Magnetic drive apparatus for web transport
CN103556318A (zh) * 2013-11-07 2014-02-05 昆山市申力毛纺有限公司 用于并条机中的压辊组
CN103590149A (zh) * 2013-11-07 2014-02-19 昆山市申力毛纺有限公司 具清洁装置的并条机压辊组
CN103590148A (zh) * 2013-11-07 2014-02-19 昆山市申力毛纺有限公司 清洁低耗的并条机压辊组

Also Published As

Publication number Publication date
ES292030A1 (es) 1963-11-16
CH426571A (de) 1966-12-15
DE1169814B (de) 1964-05-06

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