US3719316A - Web spreader element - Google Patents

Web spreader element Download PDF

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Publication number
US3719316A
US3719316A US00136378A US3719316DA US3719316A US 3719316 A US3719316 A US 3719316A US 00136378 A US00136378 A US 00136378A US 3719316D A US3719316D A US 3719316DA US 3719316 A US3719316 A US 3719316A
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United States
Prior art keywords
shaft
spreader
web
roll
cylindrical
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
US00136378A
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English (en)
Inventor
K Frye
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Beloit Corp
Original Assignee
Beloit Corp
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Filing date
Publication date
Application filed by Beloit Corp filed Critical Beloit Corp
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Publication of US3719316A publication Critical patent/US3719316A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/4148—Winding slitting

Definitions

  • a spreader element which is useful to spread a web includes an adjustably bowable shaft and a cylindrical, non-rotatable outer surface about the bowable shaft.
  • the outer cylindrical surface is made up of a plurality of separate cylindrical segments axially aligned along the shaft each segment being non-rotatable relative to the member.
  • This invention relates to a web spreader element. More particularly, the invention relates to a spreader which comprises a shaft which is adjustably bowable and a non-rotatable cylindrical outer surface mounted on the shaft. Even more particularly, the invention relates to such a spreader wherein the outer cylindrical surface comprises a plurality of individual hardened or nonhardened ring segments.
  • the large roll is usually re-wound onto a plurality of axially aligned cores of suitable length on a re-wind device.
  • the paper is slit lengthwise to form a plurality of webs of proper width.
  • the width corresponds to the length of the core on which the particular-web is wound. Overlap of paper between adjacent rolls on the re-winding device obviously cannot be tolerated and, for this reason, the slit paper is spread out, fan-like, by means of a spreader.
  • a conventional spreader can be either a roll comprising an adjustably bowable shaft and a cylindrical outer surface mounted for rotation about the bowable shaft, on a D-bar (description later).
  • a widely used spreader roll 3,719,316 Patented Mar. 6, 1973 roller.
  • the D-bar on the other hand is a bar its cross section being in the form of a D with individual adjustment every 3 to 12" across the machine. This flexible bar is adjusted in such a way as to spread a multiplicity of webs with the optimum adjustment being one of uniform curvature of the bar. While devices of this type are widely used, they are generally unsatisfactory in several respects.
  • the paper which passes over the spreader roll is, of course, of relatively low mass.
  • the spreader roll, and the outer surface thereof is of relatively high mass.
  • a web passing over the spreader roll frequently induces an air film between the web and the spreader roll surface and this loss of traction causes a difference in speed between the web and the spreader roll.
  • massive rotating spreader roll elements such as the rubber-canvas composition mentioned, are usually driven at web speed which requires a relatively complex device.
  • a paper roll of large diameter is normally utilized to form several rolls of small diameter.
  • the D-bar on the other hand has a plurality of adjustments spaced across the bar. Since the optimum method of spreading incorporated uniform curvature of the bar, it is readily apparent that the operator cannot adjust this how to a uniform curvature and consequently the paper interweaves.
  • a spreader roll comprising a bowable shaft, means for adjustably bowing said shaft, and a plurality of cylindrical rings individually mounted along said shaft and secured thereto to prevent rotation thereof relative to said shaft, said rings each having a cylindrical ,outer surface of equal diameter, said outer surfaces being in axial alignment forming a generally continuous cylindrical spreader roll surface capable of being adjustably bowed, and being spaced apart along the length of said shaft a distance sufficient to permit bowing of said shaft, said spreader roll surface comprising said plurality of non-rotatable cylindrical surfaces.
  • FIG. 1 is a diagrammatic view of a rewinding device including a web spreader according to the present invention
  • FIG. 2 is an elevation of a web spreader according to the present invention.
  • FIG. 3 is an enlarged view of a portion of the web spreader of FIG. 2.
  • a spreader according to the present invention is utilized in a re-winding device shown generally in FIG. l.
  • a roll 1 of paper is slit by knives 2 to form a plurality of webs having a width less than the width of the original roll.
  • the original roll is split such that four rolls of equal width are obtained.
  • the roll is wound from the large roll 1 on to a plurality of cores 3 axially aligned in the nip formed between re-wind rollers 4 and 5.
  • a single end of one core 3 is shown in the drawing for simplicity. Each core is thus Wound with a roll of paper 6 having a width corresponding to the length of the core.
  • the width is established by the positions of the knives 2 which, in turn, are selected depending upon the size width of the rolls desired to be produced. Overlap between layers of paper on adjacent re-wound rolls 6 cannot be tolerated in a device of this type. Accordingly, the slit paper is passed over a spreader 7 in order to spread the slit paper prior to rewinding.
  • the spreader according to the present invention comprises an adjustably bowable shaft over which is mounted a nonrotatable cylindrical outer surface. On passage over the bowed spreader, the same air film is developed. However, in this case the sliding surface is lubricated by the air and can be enhanced further by the introduction of air for slower speeds. At no time is there a change of relative speed between the web and bar.
  • Spreader 7 according to the present invention is shown in detail in FIG. 2. Many methods are and can be applied to bow the bar uniformly.
  • One such device comprises a shaft 11 which is split into two portions 11' and 11" by virtue of a slit 12 extending through the shaft from end 13 to a point 14 located adjacent the opposite end portion 11 of the shaft, said opposite end being solid.
  • the shaft is adjustably bowable in the direction of arrow 15 by means of a pin 16 which is movable in a cavity 17 located in end 13 of the shaft.
  • the cavity 17 is concentric with the shaft and includes a bottom wall 18 against which the pin bears.
  • the inner section of pin 16 is partially cut away such that the pin 16 contracts only shaft portion 11 of surface 18.
  • End portion 11 of shaft 11 is fixed to a sleeve 19 by welding or other means and sleeve 19 is, in turn, fixed to a bearing 20 of known type which comprises bearing member 21 movably mounted within fixed bearing member 22 which supports that end of the shaft.
  • a similar bearing 23 comprising members 24 and 25 supports the other end of the shaft.
  • Pin 16 can be biased against surface 18 by means of a ram 26 which is operated by a hydraulic system which is not shown for purposes of simplicity.
  • the hydraulic fluid is introduced between ram 26 and a housing 27 defining a cylinder for the ram. Hydraulic pressure bet-Ween housing 27 and the ram 26 causes the ram to move to the left in the sense of FIG.
  • pin 16 which, in turn, causes pin 16 to move to the left and bear against surface 18 of portion 11" of shaft 11. Since the pin bears against portion 11" of split shaft 11, the shaft is caused to bow in the direction of arrow 15 as shown. Pin 16 is keyed in cavity 17 to prevent rotation thereof.
  • the shaft is mounted in any convenient manner and preferably includes spherical mounting members 20 and 23 which do not impede bowing of the spreader and which permit rotating adjustment of the shaft to change the location of the bow relative to the unbowed shaft axis.
  • the adjustably bowable spreader is provided with a plurality of non-rotatable segments 28 having cylindrical outer surfaces and axially aligned along the shaft. Each segment presents an outer cylindrical surface 29 which is not rotatable about the shaft.
  • An individual segment is shown in more detail in FIG. 3 and, in BIG. 2, one of the segments has been shown in cross section to illustrate the manner in which each segment is secured to the shaft 11.
  • Each segment 28 comprises a ring 30 having a cylindrical inner surface 31 adjacent the shaft surface and an outer surface 29.
  • Each ring segment is secured to shaft 11 by means of one or more set screws 32 or other suitable means (such as a key) to prevent rotation on the shaft.
  • the inner surface 31 is preferably a close fit with the outer surface of shaft 11.
  • a plurality of ring segments are provided along shaft 11 between end flanges 33 and 34. The rings are spaced along the shaft such that they do not unduly impede the bowing of the roll.
  • Outer surfaces 29 of the ring segments are preferably smooth to enhance formation of an air rfilm between the surface and the web.
  • the rings are preferably fabricated of a hardened metal but any metal can be used.
  • the spreader can also be provided with means to introduce air between the web and outer surface 29.
  • compressed air can be introduced into a plenum 35 located behind each ring by means of a conduit 36 in shaft 11 and from the plenum to a plurality of apertures 37 in outer surface 29 by means of a conduit 38 in ring segment 28.
  • Apertures 37 are, of course, located in that portion of the outer cylindrical surface of the spreader which is traversed by the moving web.
  • the area which is traversed by the web will vary, of course, depending on web width, angle of web incidence, and the like, and the spreader preferably includes conventional valve means, conduit means and the like by which the size of the aerated surface area can be changed.
  • the spreader device is a non-rotatable roll member comprising a plurality of rings having a cylindrical outer surface of equal diameter.
  • the outer surfaces are in axial alignment and are spaced apart along the length of the shaft a distance sufficient to permit bowing of the shaft and sufficient to form a generally continuous smooth cylindrical spreader roll surface.
  • each segment can vary widely. The diameter thereof will depend to a large extent on the size of the operation, and will generally correspond to the diameter of conventional spreader rolls.
  • the width of each segment can also vary widely depending upon the size of the operation. In most instances, the segments will be between one and twelve inches in width. -In general, the width of the segments is most logically to be as narrow as possible to simulate a continuous curved surface. In order to provide an effective spreader roll surface, at least 3 or 4 segments will be present beneath an individual slit sheet of paper. Therefore, segment width will be not more than /a or A of the width of the paper sheet passing thereover.
  • the segments can be as small as desired, a practical lower limit being about 1 inch or /2 inch.
  • the spacing between segments should be sufficiently close to provide an effective spreader roll surface which is effectively continuous.
  • the segments must not be placed so close together as to hinder bowing Within a given useful range.
  • the spacing is clearly dependent upon the diameter and width of the segment as well as its elasticity, and no precise figures can be given. However, it is a simple matter to calculate the gap that will be necessary to permit unhindered bowing.
  • the outer portion of the rings will generally be spaced apart further than the inner portions of the rings.
  • the inner portions in fact, can be quite close, particularly if fabricated from a resilient material.
  • a web spreader comprising a bowable shaft, means for adjustably bowing said shaft, and a plurality of cylindrical rings individually mounted along said shaft and secured thereto to prevent rotation thereof relative to said shaft, said rings each having a cylindrical outer surface of equal diameter, said outer surfaces being in axial alignment forming a generally continuous cylindrical spreader roll surface capable of being adjustably bowed, and being spaced apart along the length of said shaft a distance sufiicient to permit bowing of said shaft, said spreader roll surface comprising said plurality of non-rotatable cylindrical surfaces.
  • a web spreader according to claim 1 further including means for conveying air from an inner portion of said spreader through apertures in said outer surface to form an air film between said outer surface and a web moving in adjacency therewith.
  • a web spreader according to claim 2 further including means for guiding a web into adjacency with said curved surface.

Landscapes

  • Winding Of Webs (AREA)
  • Replacement Of Web Rolls (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
US00136378A 1971-04-22 1971-04-22 Web spreader element Expired - Lifetime US3719316A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13637871A 1971-04-22 1971-04-22

Publications (1)

Publication Number Publication Date
US3719316A true US3719316A (en) 1973-03-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00136378A Expired - Lifetime US3719316A (en) 1971-04-22 1971-04-22 Web spreader element

Country Status (11)

Country Link
US (1) US3719316A (xx)
JP (1) JPS5122084B1 (xx)
BE (1) BE782371A (xx)
BR (1) BR7202283D0 (xx)
CA (1) CA944385A (xx)
DE (1) DE2220025C3 (xx)
ES (1) ES401906A1 (xx)
FI (1) FI53439C (xx)
FR (1) FR2136726A5 (xx)
GB (1) GB1376819A (xx)
SE (1) SE387611B (xx)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902647A (en) * 1971-03-17 1975-09-02 Oxy Metal Industries Corp Vortex diffuser fluid bearing device
US4176775A (en) * 1977-03-28 1979-12-04 Beloit Corporation Inhibiting noise in sheet spreaders
US4300714A (en) * 1980-01-17 1981-11-17 Beloit Corporation Method and apparatus for silencing of webs
US4832274A (en) * 1987-03-05 1989-05-23 E. I. Du Pont De Nemours And Company Film winding apparatus and method
US6082660A (en) * 1996-06-14 2000-07-04 Beloit Technologies, Inc. Separating device for winding devices for material webs, longitudinally divided into several partial webs
US20050116080A1 (en) * 2003-11-27 2005-06-02 Fuji Photo Film Co., Ltd. Recording material roll unit and apparatus for manufacture of recording material roll unit
EP1637488A2 (en) * 2004-08-26 2006-03-22 S.I.A.T. SOCIETA' INTERNAZIONALE APPLICAZIONI TECNICHE S.p.A. Method and machine for cutting an adhesive tape in a plurality of narrow tapes and for the rewinding thereof
US20110299841A1 (en) * 2010-06-05 2011-12-08 Zongfa Cheng Internal Power Driven Automatic Backdrop Apparatus
CN108455361A (zh) * 2018-03-28 2018-08-28 苏州比阳特服装设备有限公司 铺布机压布装置的压布条结构

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1195385B (it) * 1983-01-25 1988-10-19 Robopac Srl Procedimento e dispositivo per avvolgere contenitori e simili
GB2193734A (en) * 1986-08-07 1988-02-17 Orbit Weaving Machinery Limite Fabric folding machine
CN103159059B (zh) * 2013-03-29 2015-06-24 深圳市宜美特科技有限公司 分切机收卷轴压辊
FR3018796B1 (fr) * 2014-03-20 2016-05-27 Patrick Gennesson Procede et machine pour realiser des bobines de petites largeurs de film en matiere plastique etirable, a partir d'une bobine de grande largeur.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2054214A (en) * 1934-04-26 1936-09-15 Provincial Paper Ltd Process and apparatus for making paper
FR1567277A (xx) * 1968-03-15 1969-05-16

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902647A (en) * 1971-03-17 1975-09-02 Oxy Metal Industries Corp Vortex diffuser fluid bearing device
US4176775A (en) * 1977-03-28 1979-12-04 Beloit Corporation Inhibiting noise in sheet spreaders
US4300714A (en) * 1980-01-17 1981-11-17 Beloit Corporation Method and apparatus for silencing of webs
US4832274A (en) * 1987-03-05 1989-05-23 E. I. Du Pont De Nemours And Company Film winding apparatus and method
US6082660A (en) * 1996-06-14 2000-07-04 Beloit Technologies, Inc. Separating device for winding devices for material webs, longitudinally divided into several partial webs
US20050116080A1 (en) * 2003-11-27 2005-06-02 Fuji Photo Film Co., Ltd. Recording material roll unit and apparatus for manufacture of recording material roll unit
EP1637488A2 (en) * 2004-08-26 2006-03-22 S.I.A.T. SOCIETA' INTERNAZIONALE APPLICAZIONI TECNICHE S.p.A. Method and machine for cutting an adhesive tape in a plurality of narrow tapes and for the rewinding thereof
EP1637488A3 (en) * 2004-08-26 2007-03-21 S.I.A.T. SOCIETA' INTERNAZIONALE APPLICAZIONI TECNICHE S.p.A. Method and machine for cutting an adhesive tape in a plurality of narrow tapes and for the rewinding thereof
US20110299841A1 (en) * 2010-06-05 2011-12-08 Zongfa Cheng Internal Power Driven Automatic Backdrop Apparatus
CN108455361A (zh) * 2018-03-28 2018-08-28 苏州比阳特服装设备有限公司 铺布机压布装置的压布条结构

Also Published As

Publication number Publication date
BR7202283D0 (pt) 1973-06-05
DE2220025A1 (de) 1972-11-02
DE2220025B2 (de) 1981-01-08
GB1376819A (en) 1974-12-11
ES401906A1 (es) 1975-03-16
SE387611B (sv) 1976-09-13
FI53439B (xx) 1978-01-31
BE782371A (fr) 1979-08-16
JPS5122084B1 (xx) 1976-07-07
DE2220025C3 (de) 1981-08-13
FR2136726A5 (xx) 1972-12-22
FI53439C (fi) 1978-05-10
CA944385A (en) 1974-03-26

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