US20040238680A1 - Device for winding and/or unwinding a film at a constant speed - Google Patents

Device for winding and/or unwinding a film at a constant speed Download PDF

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Publication number
US20040238680A1
US20040238680A1 US10/888,490 US88849004A US2004238680A1 US 20040238680 A1 US20040238680 A1 US 20040238680A1 US 88849004 A US88849004 A US 88849004A US 2004238680 A1 US2004238680 A1 US 2004238680A1
Authority
US
United States
Prior art keywords
film
reel
support areas
edges
winding
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.)
Abandoned
Application number
US10/888,490
Other languages
English (en)
Inventor
Patrice Lavergne
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.)
Kis SAS
Original Assignee
Kis SAS
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 Kis SAS filed Critical Kis SAS
Assigned to KIS reassignment KIS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LAVERGNE, PATRICE
Publication of US20040238680A1 publication Critical patent/US20040238680A1/en
Abandoned legal-status Critical Current

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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
    • B65H16/00—Unwinding, paying-out webs
    • B65H16/10—Arrangements for effecting positive rotation of web roll
    • B65H16/106—Arrangements for effecting positive rotation of web roll in which power is applied to web roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • B65H18/14—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web
    • B65H18/22—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web by friction band
    • 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
    • B65H2301/4143—Performing winding process
    • B65H2301/41432—Performing winding process special features of winding process
    • B65H2301/414327—Performing winding process special features of winding process winding on core irregular inner or outer longitudinal profile, e.g. stepped or grooved

Definitions

  • the present invention relates to a device for winding and/or unwinding a film at a constant speed. It applies particularly, but not exclusively, to a film in an optoelectronic apparatus such as a scanning analyzer.
  • Films are usually wound or unwound with the aid of a spool or reel driven by a motor.
  • the film in the unwound state, the film is of an arched shape. This means that to wind the film onto a cylindrical surface requires a not insignificant resistive effort in order to flatten the film against the cylindrical surface of the spool. This tension therefore creates a risk of damage to the film. Moreover, as soon as the resistive force is removed, any film wound on the spool tends to bulge and work itself loose from the reel with all the inconveniences which this implies;
  • the film drive must be uniform across its entire width and must produce a constant speed of advance independently of the thickness of film currently wound on the reel. This result is found to be unobtainable using cylindrical motor-driven reels unless complicated and costly arrangements are used (varying the spool drive speed as a function of the wound thickness);
  • the invention provides a device comprising:
  • a reel comprising two coaxial annular support areas, of equal diameter, which are separated from each other by a concavity and which are spaced out from one another by a distance that is slightly smaller than the width of the film, these two support areas pivoting freely,
  • guide means which are designed so as to guide the film laterally in order to wind it onto the reel such that the lateral edges of the film bear on the two respective support areas of the reel, and
  • the support areas may be connected to each other or else may be independent of each other in rotation.
  • said belts driven by a motor, carry the film forward with a constant linear speed and wind the film onto the reel independently of the wound thickness.
  • FIG. 1 is an elevation showing the locations of the various component parts of the device for guiding, driving and winding a film
  • FIG. 2 shows the cross section marked AA in FIG. 1;
  • FIG. 3 is a partial perspective view of FIG. 1.
  • the structure of the device comprises two parallel metal plates 1 a , 1 b separated by three spacers 2 a , 2 b , 2 c arranged along the top side of the plates. These various parts form a rigid unit forming the device for guiding, driving and winding the film 3 .
  • the distance between the two metal plates 1 a , 1 b is slightly greater than the width of the film 3 to be analyzed.
  • the device comprises film guiding, driving and winding means.
  • the film 3 guiding device comprises in an imaging zone two parallel coaxial spools 4 a , 4 b (of which only spool 4 a is shown) mounted rotatably via ball bearings and held in position by a pair of flat opposing elements 5 a , 5 b , 6 a , 6 b (of which only flat opposing elements 5 a and 6 a are shown).
  • Each lateral edge of the film 3 comes into contact with a respective one of these two spools around an arc of a circle in such a way that the film follows a circular path.
  • its shape is cylindrical, with a straight generatrix.
  • This position produces in the imaging area a straight transverse area, directly in front of which is a slit in a wall 7 connected to the two plates, forming a rectangular space through which the light rays passing through the film can travel.
  • the film 3 driving device comprises two belts 8 a , 8 b (of which only belt 8 a is shown) which move in a synchronized manner and which each bear on a respective lateral edge of the film 3 along the arc of the circular path. This gives a friction drive of the two lateral edges of the film which eliminates any possibility of a variation of speed between these two edges.
  • the two belts 8 a , 8 b have teeth on the non-film 3 side, the belts being driven by means of two coaxial sprockets 9 a and 9 b mounted on a spindle 10 and driven by an electric motor 11 , as well by idle sprockets (of which only sprocket 12 a is shown).
  • the two belts 8 a , 8 b are tensioned and positioned by two sets of spools, of which only set 13 a , 13 b , 13 c is shown.
  • the film 3 winding device consists of a necked reel 14 comprising an axisymetric concave form situated between its two ends.
  • the necked reel 14 is mounted rotatably on a spindle 15 parallel to the spindle of the spools 4 a , 4 b with a spring return.
  • This spindle is guided in such a way that it is able to move along an oblong drilling 16 according to the thickness of film 3 wound on the necked reel 14 .
  • the main axis of the oblong drilling 16 runs perpendicular to the tangential plane of application of the belts to the edges of the film (the force of application being colinear with the main axis of the oblong hole 16 ).
  • Two pairs of arms 17 a , 17 b , 18 a , 18 b guide the film around the necked reel 14 .
  • the arms 17 a , 17 b (of which only arm 17 a is shown) pivot on the axis O and are designed to press on the lateral edges of the film 3 , this independently of how much film 3 is wound onto the necked reel 14 .
  • the volume of the wound part of the film therefore varies as a function of the length of film wound onto the necked reel.
  • the arms 18 a , 18 b (of which only arm 18 a is shown) are for guiding the film 3 during its insertion or removal.

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Winding Of Webs (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
US10/888,490 2002-02-05 2004-07-09 Device for winding and/or unwinding a film at a constant speed Abandoned US20040238680A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0201453A FR2835514B1 (fr) 2002-02-05 2002-02-05 Dispositif pour l'enroulement et/ou le deroulement d'un film a vitesse constante
FR02.01453 2002-02-05
PCT/FR2003/000365 WO2003066491A1 (fr) 2002-02-05 2003-02-05 Dispositif pour l'enroulement et/ou le deroulement d'un film a vitesse constante

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2003/000365 Continuation WO2003066491A1 (fr) 2002-02-05 2003-02-05 Dispositif pour l'enroulement et/ou le deroulement d'un film a vitesse constante

Publications (1)

Publication Number Publication Date
US20040238680A1 true US20040238680A1 (en) 2004-12-02

Family

ID=27619966

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/888,490 Abandoned US20040238680A1 (en) 2002-02-05 2004-07-09 Device for winding and/or unwinding a film at a constant speed

Country Status (6)

Country Link
US (1) US20040238680A1 (fr)
EP (1) EP1472166A1 (fr)
JP (1) JP2005516869A (fr)
AU (1) AU2003214350A1 (fr)
FR (1) FR2835514B1 (fr)
WO (1) WO2003066491A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1315650A (en) * 1919-09-09 Cabl e
US1346356A (en) * 1915-07-20 1920-07-13 Cru Patents Corp Automatic reel-threading device
US2031079A (en) * 1933-03-06 1936-02-18 Automotion Pictures Inc Device for the rewinding of photographic films
US2953313A (en) * 1958-03-17 1960-09-20 Csutor Frank Tape core
US5000394A (en) * 1987-12-22 1991-03-19 Roll Systems, Inc. Roll support and feed apparatus
US5238198A (en) * 1989-12-15 1993-08-24 Ncr Corporation Automatic take-up device for a continuous sheet of paper
US5377932A (en) * 1991-11-18 1995-01-03 Industria Grafica Meschi S.R.L. Unwinding device for paper reels

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2229627A1 (de) * 1972-06-19 1974-01-17 Kalle Ag Verfahren und vorrichtung zum aufwickeln von flachen materialbahnen
DE29709659U1 (de) * 1997-06-03 1998-03-19 Bullmer Spezialmaschinen GmbH, 72537 Mehrstetten Aufnahmevorrichtung für einen Ballen flächigen biegsamen Gutes

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1315650A (en) * 1919-09-09 Cabl e
US1346356A (en) * 1915-07-20 1920-07-13 Cru Patents Corp Automatic reel-threading device
US2031079A (en) * 1933-03-06 1936-02-18 Automotion Pictures Inc Device for the rewinding of photographic films
US2953313A (en) * 1958-03-17 1960-09-20 Csutor Frank Tape core
US5000394A (en) * 1987-12-22 1991-03-19 Roll Systems, Inc. Roll support and feed apparatus
US5238198A (en) * 1989-12-15 1993-08-24 Ncr Corporation Automatic take-up device for a continuous sheet of paper
US5377932A (en) * 1991-11-18 1995-01-03 Industria Grafica Meschi S.R.L. Unwinding device for paper reels

Also Published As

Publication number Publication date
FR2835514B1 (fr) 2004-04-02
EP1472166A1 (fr) 2004-11-03
FR2835514A1 (fr) 2003-08-08
WO2003066491A1 (fr) 2003-08-14
AU2003214350A1 (en) 2003-09-02
JP2005516869A (ja) 2005-06-09

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Legal Events

Date Code Title Description
AS Assignment

Owner name: KIS, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LAVERGNE, PATRICE;REEL/FRAME:015566/0722

Effective date: 20040622

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE