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 PDFInfo
- 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
Links
Images
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)
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)
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)
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 |
-
2002
- 2002-02-05 FR FR0201453A patent/FR2835514B1/fr not_active Expired - Lifetime
-
2003
- 2003-02-05 AU AU2003214350A patent/AU2003214350A1/en not_active Abandoned
- 2003-02-05 JP JP2003565881A patent/JP2005516869A/ja not_active Withdrawn
- 2003-02-05 WO PCT/FR2003/000365 patent/WO2003066491A1/fr not_active Application Discontinuation
- 2003-02-05 EP EP03709920A patent/EP1472166A1/fr not_active Withdrawn
-
2004
- 2004-07-09 US US10/888,490 patent/US20040238680A1/en not_active Abandoned
Patent Citations (7)
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 |
---|---|
JP2005516869A (ja) | 2005-06-09 |
FR2835514A1 (fr) | 2003-08-08 |
WO2003066491A1 (fr) | 2003-08-14 |
AU2003214350A1 (en) | 2003-09-02 |
FR2835514B1 (fr) | 2004-04-02 |
EP1472166A1 (fr) | 2004-11-03 |
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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 |