US3667697A - Mechanism for holding a tubular core - Google Patents

Mechanism for holding a tubular core Download PDF

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Publication number
US3667697A
US3667697A US885491A US3667697DA US3667697A US 3667697 A US3667697 A US 3667697A US 885491 A US885491 A US 885491A US 3667697D A US3667697D A US 3667697DA US 3667697 A US3667697 A US 3667697A
Authority
US
United States
Prior art keywords
mandrel
shaft
core
studs
cylinder
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
US885491A
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English (en)
Inventor
Erich Binder
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.)
Novartis AG
Original Assignee
Ciba Geigy AG
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 Ciba Geigy AG filed Critical Ciba Geigy AG
Application granted granted Critical
Publication of US3667697A publication Critical patent/US3667697A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/58—Baseboards, masking frames, or other holders for the sensitive material
    • G03B27/587—Handling photosensitive webs
    • G03B27/588—Supply rolls; Cutting arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/24—Constructional details adjustable in configuration, e.g. expansible
    • B65H75/242—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages
    • B65H75/246—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages expansion caused by relative rotation around the supporting spindle or core axis
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/32—Details specially adapted for motion-picture projection
    • G03B21/43—Driving mechanisms
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2217/00—Details of cameras or camera bodies; Accessories therefor
    • G03B2217/26—Holders for containing light-sensitive material and adapted to be inserted within the camera
    • G03B2217/261—Details of spools

Definitions

  • ABSTRACT This invention relates to a mechanism for securely holding a tubular core on which a band of material such as photographic paper is to be wound.
  • the core is held by a gripping mechanism inside a mandrel on which the core is mounted.
  • Running through the mandrel coaxially therewith is a rotatable shaft having three rollers each mounted on a different apex of a triangular plate securely coupled to the shaft.
  • Studs radially located within the mandrel are positioned to be engaged by the rollers so that on rotation of the shaft relative to the mandrel the studs protrude through the periphery of the mandrel to grip the core.
  • a friction clutch between the mandrel and the shaft is provided to hold them in position after the studs have been engaged with the core.
  • the invention relates to mechanism for securely locating and holding tubular bobbins, spools or cores, particularly cores for winding and unwinding a band of photographic printing paper.
  • a mandrel is fast on a drive shaft and actuating elements are formed by a coaxial camshaft which is freely rotatable inside the mandrel but locatable in certain angular positions by a locking nut.
  • the locking nut For mounting and securing as well as for releasing a core on which, for example, a band of photographic material is to be wound, the locking nut must be slackened off, the camshaft rotated and the locking nut tightened again.
  • the operations of mounting and releasing a winding core are therefore complicated as well as time-consuming.
  • Another defect is that for turning the camshaft and for slackening off and retightening the locking nut a special tool may be required.
  • the mandrel including movable gripping means arranged to be pushed radially outwards against a resilient restoring means by one or more elements located centrally in the mandrel, in which the winding mandrel is frictionally coupled to the drive shaft and the actuating element(s) for displacing the gripping means is or are coupled to the drive shaft for rotation therewith in such manner that rotation of the mandrel relative to the drive shaft causes the actuating element(s) to force the gripping means radially outwards.
  • the invention thus has the further advantage over the aforementioned mechanism that the disposition of the actuating elements directly on the drive shaft eliminates the need for a special camshaft.
  • FIG. 1 is a part sectional side view of the proposed mechanism
  • FIGS. 2a and 2b are sections taken on the line II II in FIG. 1, showing the mechanism in two different operating positlons.
  • a baseplate 1 carries a bearing sleeve 2 in which a drive shaft 5 connected by means of a flexible coupling 8 to a motor shaft 9 is mounted in two ball races 3 and 4.
  • a braking disc 6 and a substantially triangular flange 7 are fast on the drive shaft 5.
  • the flange carries a roller 13 mounted on an axle pin 11.
  • Rotatably and axially movably mounted on the drive shaft 5 on bearing bushes l6 and 17 is a winding mandrel 14 to which a cover plate 15 is attached.
  • a friction disc 18 and a flange 19 are attached to the winding mandrel 14.
  • the front end of the drive shaft 5 carries a nut 25 which can be locked in any position by a fixing screw 26. lnterposed between the nut 25 and the bush 17, which is firmly connected to a friction disc 18 by the cover plate 15 and the winding mandrel 14, is a coil spring 27 which therefore operates to urge the friction disc 18 into contact with the brake disc 6 to establish a friction clutch.
  • a winding core 29 mounted on the mandrel is also shown in the drawing in dot-dash lines.
  • the rear end flange 19 may be supplemented by a front end flange 30 which has an extension 31 that is insertable into the winding core.
  • Radially movably mounted inside the winding mandrel 14 are three studs 20, each carrying a pin 22 for limiting the radial displaceability of the stud.
  • the studs slide in slots in the winding mandrel 14.
  • a peripheral recess 32 provided in the winding mandrel 14 in the same radial plane as the studs contains a thin elastic expandable ring 28.
  • the outer surface of this ring should have the maximum possible coefficient of friction.
  • the thickness of the ring is slightly less than the depth of the recess 32 to permit a winding core to be easily fitted and detached.
  • a radial bore in the winding mandrel 14 contains a pin 23 which serves as a stop cooperating with one of the rollers 13.
  • the winding mandrel 14 For firmly holding the winding core 29 the winding mandrel 14 is rotated clockwise from the position shown in FIG. 2a to that shown in FIG. 2b, causing the bevelled internal ends of the studs 20 to ride on to the rollers 13 which force them radially outwards against the inside of the elastic ring 28 thus causing the appertaining circumferential portion of this ring to be distorted or expanded in a radially outward direction so as to engage and grip with its outer frictionized surface the interior of the winding core 29 at three different places spaced apart.
  • the winding mandrel 14 When the winding core 29 has been mounted and gripped by ring 28, the winding mandrel 14 is prevented from turning backwards and thereby from releasing the core by virtue of the friction between the brake disc 6 and the friction disc 18. This friction can be adjusted by means of the nut 25.
  • the flange 19 which is attached to the winding mandrel 14 can be conveniently used for manually operating the mechanism. Owing to the relatively large diameter of the flange l9 and the resultant large leverage considerable gripping forces can be generated with little effort, and for the purpose of replacing a winding core the winding mandrel can be easily turned against the resistance of a fairly high coupling friction.
  • the flange l9 and hence the mandrel 14 For releasing the winding core 29, the flange l9 and hence the mandrel 14 must be turned counter-clockwise from the position shown in FIG. 2b to that shown in FIG. 2a. This causes the studs 20 to ride off the rollers so that they can be pushed radially inwards by the elastic ring 28. The necessary rotation for effecting release (as when tightening) must again be accomplished by overcoming the friction between the brake disc 6 and the friction disc 18.
  • the stop pin 23 limits the total angle of turn.
  • the direction in which the band tension principally acts is preferably arranged to generate a torque in the same direction as that required by shaft 5 for tightening the core on the mandrel 14.
  • a core holding mechanism comprising;
  • gripping means radially mounted in said mandrel and engageable by said actuating elements upon rotation of the mandrel relative to the shaft against the force of said frictional clutch means to push the gripping means radially outwards and engage the inside surface of said core thereby holding the core firmly on the mandrel so that said core rotates with said shaft.
  • said mandrel comprises a hollow cylinder, said cylinder being formed to provide a plurality of bores radially disposed about the axis of the cylinder, said gripping means comprises a plurality of studs each slidably mounted in a different one of said bores and said actuating elements comprise a plurality of rollers having their axes aligned with the axis of said shaft and positioned to engage said studs and push them radially outwards upon said relative rotation between the shaft and the mandrel.
  • a mechanism according to claim 1 wherein said clutch means comprises a friction disc mounted on one end of said mandrel and coaxial with said shaft and a braking disc secured to said shaft and in frictional contact with said friction disc.
  • a mechanism according to claim 3 including means for varying the frictional force provided by said clutch means, said frictional force varying means comprising a nut threaded on said shaft and spring means interposed between said nut and that end of said mandrel opposite said one end.
  • said mandrel comprises a hollow cylinder, said cylinder being formed to provide three equiangularly spaced radial bores disposed about the axis of the cylinder and a peripherally extending recess into which said bores open
  • said gripping means comprises a plurality of studs each slidably mounted in a different one of said bores and an elastically deformable ring seated in said recess
  • said actuating elements include a triangular plate secured fast to said shaft and rollers mounted respectively on said triangular plate at each of the three different apices thereof for rotation on an axis parallel to that of said shaft, each said roller being engageable with the radially inner end of a different one of said studs for efiecting radially outward displacement of said studs upon relative rotation as between said shaft and cylinder thereby to establish radially outward deformations of the corresponding peripheral portions of said elastic ring into a gripping contact with the inner surface

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Winding Of Webs (AREA)
  • Mechanical Operated Clutches (AREA)
US885491A 1968-12-17 1969-12-16 Mechanism for holding a tubular core Expired - Lifetime US3667697A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1873368A CH501549A (de) 1968-12-17 1968-12-17 Vorrichtung zum Aufspannen eines rohrförmigen Wickelkernes auf eine Antriebswelle

Publications (1)

Publication Number Publication Date
US3667697A true US3667697A (en) 1972-06-06

Family

ID=4434958

Family Applications (1)

Application Number Title Priority Date Filing Date
US885491A Expired - Lifetime US3667697A (en) 1968-12-17 1969-12-16 Mechanism for holding a tubular core

Country Status (5)

Country Link
US (1) US3667697A (de)
CH (1) CH501549A (de)
DE (1) DE1962449A1 (de)
FR (1) FR2026342A1 (de)
GB (1) GB1290357A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963250A (en) * 1972-04-03 1976-06-15 Double E Company, Inc. Chuck
US6168110B1 (en) * 1998-02-24 2001-01-02 Philip Morris Management Corp. Dual bobbin mandrel
US6876287B2 (en) 2002-05-10 2005-04-05 Minebea Co., Ltd. Bobbin structure and transformer and inductor employing same
US20080016824A1 (en) * 2006-07-21 2008-01-24 Uhlmann Pac-Systeme Gmbh & Co. Kg Foil feeder for sealing unit of blister-packaging machine

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT305901B (de) * 1970-11-19 1973-03-26 Otto Haemmerle Maschb Transportklemme für bahnförmige Materialien
FR2281886A1 (fr) * 1974-08-14 1976-03-12 Erca Mecanisme pour l'entrainement pas a pas d'un organe de transport sans fin
DE2612375C2 (de) * 1976-03-24 1983-04-14 A. Ahlström Development GmbH, 7315 Weilheim Spannkopf für die die Kernrohre von Wickeln aus Papier, Kunststoffolien oder dergleichen
AT361290B (de) * 1975-06-13 1981-02-25 Ahlstroem Dev Gmbh An einem antreibbaren wellenende angeordneter spannkopf fuer wickeln aus papier, kunststoff- folien od.dgl.
DE3829704A1 (de) * 1988-09-01 1990-03-15 Jagenberg Ag Spann- und fuehrungsvorrichtung fuer wickelhuelsen
US5375791A (en) * 1993-02-11 1994-12-27 Minnesota Mining And Manufacturing Company Hub aligning rotary chuck
DE4339092C2 (de) * 1993-11-16 1995-10-19 Hubertus Dipl Ing Hein Transportvorrichtung für Flachmaterial
DE19517225C2 (de) * 1995-05-11 1998-03-12 Beiersdorf Ag Wickelwelle
DE19607835C2 (de) * 1996-03-01 1998-09-10 Honigmann Ind Elektronik Gmbh Spulspindel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889123A (en) * 1955-12-05 1959-06-02 Eastman Kodak Co Spool and spindle assembly
US3006565A (en) * 1960-06-30 1961-10-31 Eugene V Pelletier Bobbin clutch
GB917978A (en) * 1960-07-04 1963-02-13 Tmm Research Ltd Improvements in bobbin clutches for textile spinning and like spindles
FR1372400A (fr) * 1963-10-29 1964-09-11 Rieter Ag Maschf Dispositif pour maintenir et entraîner un fuseau de broche à filer ou à retordre

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889123A (en) * 1955-12-05 1959-06-02 Eastman Kodak Co Spool and spindle assembly
US3006565A (en) * 1960-06-30 1961-10-31 Eugene V Pelletier Bobbin clutch
GB917978A (en) * 1960-07-04 1963-02-13 Tmm Research Ltd Improvements in bobbin clutches for textile spinning and like spindles
FR1372400A (fr) * 1963-10-29 1964-09-11 Rieter Ag Maschf Dispositif pour maintenir et entraîner un fuseau de broche à filer ou à retordre

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963250A (en) * 1972-04-03 1976-06-15 Double E Company, Inc. Chuck
US6168110B1 (en) * 1998-02-24 2001-01-02 Philip Morris Management Corp. Dual bobbin mandrel
US6876287B2 (en) 2002-05-10 2005-04-05 Minebea Co., Ltd. Bobbin structure and transformer and inductor employing same
US20080016824A1 (en) * 2006-07-21 2008-01-24 Uhlmann Pac-Systeme Gmbh & Co. Kg Foil feeder for sealing unit of blister-packaging machine

Also Published As

Publication number Publication date
FR2026342A1 (de) 1970-09-18
DE1962449A1 (de) 1970-07-09
GB1290357A (de) 1972-09-27
CH501549A (de) 1971-01-15

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