EP0741328B1 - Device for cleaning exposed films - Google Patents

Device for cleaning exposed films Download PDF

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Publication number
EP0741328B1
EP0741328B1 EP95106858A EP95106858A EP0741328B1 EP 0741328 B1 EP0741328 B1 EP 0741328B1 EP 95106858 A EP95106858 A EP 95106858A EP 95106858 A EP95106858 A EP 95106858A EP 0741328 B1 EP0741328 B1 EP 0741328B1
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EP
European Patent Office
Prior art keywords
film
roller
dry cleaning
fact
cleaning
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EP95106858A
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German (de)
French (fr)
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EP0741328A1 (en
Inventor
Andreas Schmitzer
Ingrid Manewald
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Individual
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Individual
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Priority to DE59510296T priority Critical patent/DE59510296D1/en
Priority to AT95106858T priority patent/ATE221216T1/en
Priority to EP95106858A priority patent/EP0741328B1/en
Priority to AU52014/96A priority patent/AU710529B2/en
Priority to US08/641,829 priority patent/US5713102A/en
Publication of EP0741328A1 publication Critical patent/EP0741328A1/en
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Publication of EP0741328B1 publication Critical patent/EP0741328B1/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D15/00—Apparatus for treating processed material

Definitions

  • the invention relates to a film cleaning device according to the Preamble of claim 1.
  • a film cleaning device is known from the German utility model DE-9 319 373 U known.
  • the film first pull through an immersion bath in order to remove a large part of the adhesive To remove dirt.
  • the film is then dried using warm air and then subjected to electrostatic cleaning, in which the loose due to Discharge and brush off dust particles adhering to electrostatic charge become.
  • electrostatic dry cleaning Dry cleaning step using adhesive rollers, which with their adhesive surfaces remove the remaining dust and dirt particles from the film surface.
  • the object of the invention is to provide a film cleaning device to improve the type mentioned at the outset in that at a satisfactory Cleaning effect ensures a safe winding of the cleaned film is.
  • Fig. Lin a schematic side view Film cleaning device for an exposed film 1, in particular cinema film, has a closed housing 20 with a mounting plate 3, which is parallel to the drawing plane in the vertical direction. Are on the mounting plate 3 fixes the device components housed in the housing 20.
  • an unwinding roll 10 freely rotatable, which is provided with a roller brake, not shown, thus the film roll 12 applied to the roll 10 with a defined tensile force must be handled.
  • This traction is, as explained in more detail to be by the drive motor 71 of a capstan roller 70 and the drive motor 61 a winding roller 60 applied together.
  • the take-up roll 60 is arranged vertically above the unwinding roll 10, which has the advantage that the Cleaning device in addition to rewinding the film 1 (which in this mode is designated 1 ') can be used.
  • the one provided for rewinding Filmbahn is shown in Fig. 1 with a dashed line.
  • the film is in a film guide level that corresponds to the drawing level 1 coincides from the unwinding roller 10 via a deflection roller 2 led vertically upwards to a first dry cleaning station 30, which as Ionization device is formed.
  • the ionizer includes two, one rod-shaped discharge devices arranged opposite film surfaces 31, 32, which is electrically powered by a common high-voltage power supply become.
  • the ions sprayed on by the discharge devices 31, 32 neutralize the electrical charges present on the film surfaces.
  • the thus discharged dust and dirt particles on the film surfaces are at the Further transport of the film 1 with the help of soft hairbrushes 33, 34, which are against the two film surfaces are directed, brushed off.
  • the film 1 After passing through the first dry cleaning station 30, the film 1 by means of two further deflection rollers 5, 6 by about 180 ° in its running direction vice versa and fed to a second dry cleaning station 40. Between Deflection rollers 5, 6 are in constant contact with the film 1 standing limit switch 7, which detects a film tear and a corresponding Sensor signal supplies the drive motors 61 and 71. The drive motors 61 and 71 are stopped immediately upon detection of a film tear, so that the Film transport through the capstan roll 70 and the take-up roll 60 is stopped.
  • the second dry cleaning station 40 consists in the example shown two, each on a film surface attacking adhesive rollers 41, 42. Die von Adhesive layer to be replaced from time to time on the surfaces of the adhesive rollers 41, 42 removes residual dust and dirt particles from two film surfaces. Instead of adhesive rolls, rolls with dielectric Surface material can be used, which by electrostatic Charge the remaining dust and dirt particles from both film surfaces remove.
  • the film 1 bypassing the adhesive rollers 41, 42 via a shunt roller 4 directly to one another deflection roller 51, which is in the film path behind the second adhesive roller 42 is arranged.
  • the deflection roller 51 forms together with another Deflection roller 52 a pair of wrapping rollers 50. Behind the roller 51 and in front of the Roll 52, the capstan roll 70 is arranged.
  • the pair of wrapping rollers 50 provides on the one hand for the film 1 to have a circumferential angle of more than 180 ° abuts the friction surface of the capstan roller 70.
  • the film 1 is through the wrap effect of all three rollers 51, 70 and 52 tense, which the Slip between film 1 and the friction surface of capstan roller 70 is minimized becomes.
  • the film 1 becomes the Winding roll 60 fed as film roll 65.
  • the Film roll 65 by a pressure roller 62 in the radial direction with a Pressure force applied.
  • the pressure roller 62 is free on a swivel arm 63 rotatably mounted, which if necessary under a pivot axis 64 Preload force of a spring, not shown, is pivotable.
  • the speed of the drive motor 61 is controlled by a controller (not shown) regulated in such a way that the tensile force exerted by the drive roller 60 on the film 1 is exercised evenly over the entire diameter of the film roll 65 and remains constant. Without such a traction control would increase Diameter of the film roll 65 increase the tensile force accordingly, which is synonymous would increase with the risk of a film tear. With the too cleaning films 1 are often very old and therefore appropriate dirty films where due to the aging of the footage and numerous Glue points greatly reduced the original elasticity and tensile strength is. In particular, these old films can be made with the help of the invention Clean the film cleaning device without the risk of film tears.

Abstract

The apparatus is for cleaning a reel of exposed cine film which has aged and is no longer in clean condition. It has a housing (20) with a vertical mounting board (3) containing a freely pivoted turntable (10) for the film (12) which is braked to ensure appropriate tension during unwinding. Film transport is via a powered (71) capstan (70) and a variable speed motor (61) driving the take-up spool (60) such that film tension is automatically held constant irrespective of changing spool diameters. Cleaning occurs at a first station (30) wherein electrostatic adhesion is nullified by hv ionisation (31,32) with discharged dust etc. removed by the brushes (33,34) and a second cleaning employs the adhesive-coated pick-up rollers (41,42).

Description

Die Erfindung bezieht sich auf eine Filmreinigungsvorrichtung nach dem Oberbegriff des Anspruchs 1. Eine derartige Filmreinigungsvorrichtung ist aus der deutschen Gebrauchsmusterschrift DE-9 319 373 U bekannt.The invention relates to a film cleaning device according to the Preamble of claim 1. Such a film cleaning device is known from the German utility model DE-9 319 373 U known.

Zum Reinigen von belichtelen, mehr oder weniger stark verschmutzten Filmen ist es aus der deutschen Gebrauchsmusterschrift DE-9 319 373 U bekannt, den Film zuerst durch ein Tauchbad hindurchzuziehen, um dort einen Großteil des anhaftenden Schmutzes abzulösen. Anschließend wird der Film mittels Warmluft getrocknet und sodann einer elektrostatischen Reinigung unterzogen, bei welcher die lose aufgrund elektrostatischer Aufladung anhaftenden Staubpartikel entladen und abgebürstet werden. An die elektrostatische Trockenreinigung schließt sich ein weiterer Trockenreinigungsschritt mittels Kleberollen an, welche mit ihren Klebeoberflächen die restlichen Staub- und Schmutzpartikel von der Filmoberfläche entfernen.It is for cleaning exposed, more or less heavily soiled films known from German utility model DE-9 319 373 U, the film first pull through an immersion bath in order to remove a large part of the adhesive To remove dirt. The film is then dried using warm air and then subjected to electrostatic cleaning, in which the loose due to Discharge and brush off dust particles adhering to electrostatic charge become. Another is connected to electrostatic dry cleaning Dry cleaning step using adhesive rollers, which with their adhesive surfaces remove the remaining dust and dirt particles from the film surface.

Es hat sich jedoch in Versuchen gezeigt, daß der Schmutz in dem Tauchbad nur verschmiert, aber nicht abgelöst wird und die resultierende Schmutz-Schmierschicht in den nachfolgenden Trockenreinigungsschritten nicht mehr entfernbar ist. Es ist zwar in der genannten Gebrauchsmusterschrift bereits darauf hingewiesen, gegebenenfalls auf eine Tauchbadreinigung mit nachfolgender Filmtrocknung zu verzichten, doch bezieht sich dieser Hinweis nur auf leicht verschmutzte Filme. Des weiteren traten bei der bekannten Filmreinigungsvorrichtung häufig Aufwickelprobleme auf, da infolge des alleinigen Filmantriebs durch eine Capstanrolle die auf den Film einwirkende Zugkraft in Abhängigkeit von dem sich ändernden Reibwert zwischen Filmoberfläche und Capstanrolle variiert. Bei trockener oder weniger verschmutzter Filmoberfläche ist dieser Reibwert größer als bei feuchter oder stärker verschmutzter Filmoberfläche. Zwar ist bei der bekannten Filmreinigungsvorrichtung auch ein drehzahl-gesteuerter elektrischer Antrieb für die Aufwickelrolle vorgesehen, doch wird dieser Antrieb nur zum Umspulen des Films in Betrieb gesetzt.However, tests have shown that the dirt in the immersion bath only smeared but not peeled off and the resulting dirt-smear layer is no longer removable in the subsequent dry cleaning steps. It is already pointed out in the utility model mentioned, if necessary, towards immersion bath cleaning with subsequent film drying waive, but this note only applies to lightly soiled films. Of further, winding problems often occurred in the known film cleaning apparatus on, as a result of the sole film drive by a capstan role the tensile force acting on the film as a function of the changing coefficient of friction varies between film surface and capstan roll. In dry or less dirty film surface, this coefficient of friction is greater than that of damp or more dirty film surface. Although in the known film cleaning device also a speed-controlled electric drive for the take-up reel This drive is only used to rewind the film set.

Die Aufgabe der Erfindung besteht darin, eine Filmreinigungsvorrichtung der eingangs erwähnten Art dahingehend zu verbessern, daß bei einer befriedigenden Reinigungswirkung eine sichere Aufwicklung des gereinigten Films gewährleistet ist.The object of the invention is to provide a film cleaning device to improve the type mentioned at the outset in that at a satisfactory Cleaning effect ensures a safe winding of the cleaned film is.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This object is achieved by the characterizing features of Claim 1 solved.

Vorteilhafte Ausgestaltungen und Weiterbildungen der erfindungsgemäßen Filmreinigungsvorrichtung ergeben sich aus den Unteransprüchen 2 bis 4.Advantageous refinements and developments of the invention Film cleaning device result from subclaims 2 to 4.

Die Erfindung beruht zunächst auf der Erkenntnis, daß eine ausreichende Reinigung selbst von stark verschmutzten Filmen ausschließlich durch Trockenreinigung möglich ist. Für stark verschmutzte Filme sind zwei an sich bekannte Trockenreinigungsstationen in Form elektrostatischer Reinigung und Adhäsionsreinigung hintereinander geschaltet. Für nur leicht verschmutzte Filme genügt die elektrostatische Reinigung. Hierzu kann mittels einer Shuntrolle die zweite Trockenreinigungsstation umgangen werden. Obwohl durch den Verzicht auf einen Naßreinigungsschritt der Reibwert der Filmoberfläche weniger schwankt als bei vorgeschalteter Naßreinigung mit anschließender Filmtrocknung, hat sich gezeigt, daß der alleinige Antrieb des Films durch eine Capstanrolle nicht ausreicht, um Aufwickelprobleme verbunden mit Filmrissen sicher in den Griff zu bekommen. Die Erfindung sieht daher einen dauernden Antrieb der Aufwickelrolle - d.h. nicht nur zum Umspulen des Films - vor, welcher so gesteuert wird, daß die auf den Film ausgeübte Zugkraft über den gesamten Durchmesser der Aufwickelrolle gleich-förmig ist. Dies bedeutet, daß mit steigendem Durchmesser des Filmwickels auf der Aufwickelrolle die Drehzahl des Antriebsmotors verringert wird. Infolge der gleichbleibenden Zugkraft wird ein Abreißen des Films während der Reinigung weitgehend vermieden. Gerade bei historisch wertvollen Filmen, von denen oft nur noch wenige meist stark verschmutzte Kopien existieren, wären Zugkraftänderungen wegen der alterungsbedingten Verringerung der Filmeleastizität und der zahlreichen Klebestellen besonders kritisch und könnten zu Filmrisse mit häufig irreparablen Schäden führen.
Zur weiteren Vergleichmäßigung der auf den Film ausgeübten Zugkraft ist vorgesehen, daß der Capstanrolle Umlenkrollen vor- und nachgeordnet sind, welche für eine ausreichende Filmumschlingung der Capstanrolle sorgen, womit der Schlupf zwischen Film und Capstanrolle minimiert wird. Falls dennoch einmal ein Filmriß auftreten sollte, sorgt ein Endschalter dafür, daß der Filmriß automatisch detektiert und der Filmantrieb abgeschaltet wird.
Die Erfindung wird an Hand eines in den Zeichnungen veranschaulichten Ausführungsbeispiels näher erläutert. Es zeigt:

Fig. 1
eine schematische Seitenansicht eines Ausführungsbeispiels einer Reinigungsvorrichtung nach der Erfindung, und
Fig. 2
eine gegenüber Fig. 1 um 90° gedrehte, schematische Ansicht der Abwickel- und Aufwickelrollen sowie des Filmantriebs der Vorrichtung nach der Erfindung.
The invention is based initially on the knowledge that adequate cleaning, even of heavily soiled films, is only possible by dry cleaning. For heavily soiled films, two dry cleaning stations known per se in the form of electrostatic cleaning and adhesion cleaning are connected in series. Electrostatic cleaning is sufficient for only lightly soiled films. For this purpose, the second dry cleaning station can be bypassed using a shunt roller. Although the coefficient of friction of the film surface fluctuates less due to the lack of a wet cleaning step than with wet cleaning followed by film drying, it has been shown that the capstan roller alone is not sufficient to reliably control winding problems associated with film tears. The invention therefore provides a continuous drive of the take-up roll - ie not only for rewinding the film - which is controlled so that the tensile force exerted on the film is uniform over the entire diameter of the take-up roll. This means that the speed of the drive motor is reduced with increasing diameter of the film roll on the take-up roll. Due to the constant tensile force, tearing off of the film during cleaning is largely avoided. Especially with historically valuable films, of which there are often only a few mostly heavily soiled copies, changes in traction would be particularly critical due to the age-related reduction in film loyalty and the numerous glue spots and could lead to film tears with often irreparable damage.
To further equalize the tensile force exerted on the film, provision is made for the capstan roll to have upstream and downstream deflection rolls which ensure sufficient film wrap around the capstan roll, thus minimizing the slip between the film and the capstan roll. If a film break should nevertheless occur, a limit switch ensures that the film break is automatically detected and the film drive is switched off.
The invention is explained in more detail using an exemplary embodiment illustrated in the drawings. It shows:
Fig. 1
is a schematic side view of an embodiment of a cleaning device according to the invention, and
Fig. 2
a rotated by 90 ° compared to Fig. 1, schematic view of the unwinding and winding rollers and the film drive of the device according to the invention.

Die in Fig. lin einer schematischen Seitenansicht veranschaulichte Filmreinigungsvorrichtung für einen belichteten Film 1, insbesondere Kinofilm, weist ein geschlossenes Gehäuse 20 mit einer Montageplatte 3 auf, welche parallel zur Zeichenebene in vertikaler Richtung aufgestellt ist. An der Montageplatte 3 sind die im Gehäuse 20 untergebrachten Vorrichtungskomponenten befestigt.The illustrated in Fig. Lin a schematic side view Film cleaning device for an exposed film 1, in particular cinema film, has a closed housing 20 with a mounting plate 3, which is parallel to the drawing plane in the vertical direction. Are on the mounting plate 3 fixes the device components housed in the housing 20.

Im Bereich des unteren Abschnitts der Montageplatte 3 ist eine Abwickelrolle 10 frei drehbar angebracht, welche mit einer nicht gezeigten Rollenbremse versehen ist, damit der auf der Rolle 10 aufgebrachte Filmwickel 12 mit einer definierten Zugkraft abgewickelt werden muß. Diese Zugkraft wird, wie noch näher erläutert werden soll, von dem Antriebsmotor 71 einer Capstanrolle 70 und dem Antriebsmotor 61 einer Aufwickelrolle 60 gemeinsam aufgebracht. Die Aufwickelrolle 60 ist senkrecht oberhalb der Abwickelrolle 10 angeordnet, was den Vorteil hat, daß die Reinigungsvorrichtung zusätzlich zum Umspulen des Films 1 (der in dieser Betriebsart mit 1' bezeichnet ist), verwendet werden kann. Die beim Umspulen vorgesehene Filmbahn ist in Fig. 1 mit gestrichtelter Linie eingezeichnet.In the area of the lower section of the mounting plate 3 there is an unwinding roll 10 freely rotatable, which is provided with a roller brake, not shown, thus the film roll 12 applied to the roll 10 with a defined tensile force must be handled. This traction is, as explained in more detail to be by the drive motor 71 of a capstan roller 70 and the drive motor 61 a winding roller 60 applied together. The take-up roll 60 is arranged vertically above the unwinding roll 10, which has the advantage that the Cleaning device in addition to rewinding the film 1 (which in this mode is designated 1 ') can be used. The one provided for rewinding Filmbahn is shown in Fig. 1 with a dashed line.

Zum Reinigen wird der Film in einer Filmführungsebene, die mit der Zeichenebene von Fig. 1 zusammenfällt, von der Abwickelrolle 10 über eine Umlenkrolle 2 senkrecht nach oben zu einer ersten Trockenreinigungsstation 30 geführt, welche als Ionisierungsgerät ausgebildet ist. Das Ionisierungsgerät umfaßt zwei, auf gegenüberliegende Filmobflächen angeordnete, stabförmige Entladungseinrichtungen 31, 32, die elektrisch von einem gemeinsamen Hochspannungsnetzteil gespeist werden. Die von den Entladungseinrichtungen 31, 32 angesprühten Ionen neutralisieren die auf den Filmoberflächen verhandenen elektrischen Ladungen. Die so entladenen Staub- und Schmutzpartikel auf den Filmoberflächen werden beim Weitertransport des Films 1 mit Hilfe von weichen Haarbürsten 33, 34, die gegen die beiden Filmoberflächen gerichtet sind, abgebürstet. Um zu verhindern, daß sich die abgebürsteten Schmutz- und Staubpartikel innerhalb des Gehäuses 20 an anderer Stelle auf den Film 1 niederschlagen, ist an der Montageplatte 3 unterhalb der Haarbürsten 33, 34 eine nicht gezeigte, durch ein Sieb oder Vlies gesicherte Absaugöffnung vorgesehen, an welche ein in Fig. 1 lediglich schematisch angedeuteter Abluftstutzen 120 angeflanscht ist. Der Abluftstutzen 120 führt über ein Staubfilter 80 zu einem Sauggebläse 90. Der Verschmutzungsgrad des Staubfilters 80, der als Staubsaugerbeutel ausgebildet sein kann, wird durch einen Sensor 100 überwacht und optisch signalisiert. Selbstverständlich befinden sich die Aggregate 80 und 90 - entgegen der Schemadarstellung in Fig. 1 - innerhalb des geschlossenen Gehäuses 20, und zwar auf derselben Seite wie die Antriebsmotoren 61 und 71 hinter der Montageplatte 3, welche das Gehäuse 20 wie eine Trennwand unterteilt.For cleaning, the film is in a film guide level that corresponds to the drawing level 1 coincides from the unwinding roller 10 via a deflection roller 2 led vertically upwards to a first dry cleaning station 30, which as Ionization device is formed. The ionizer includes two, one rod-shaped discharge devices arranged opposite film surfaces 31, 32, which is electrically powered by a common high-voltage power supply become. The ions sprayed on by the discharge devices 31, 32 neutralize the electrical charges present on the film surfaces. The thus discharged dust and dirt particles on the film surfaces are at the Further transport of the film 1 with the help of soft hairbrushes 33, 34, which are against the two film surfaces are directed, brushed off. To prevent yourself the brushed dirt and dust particles within the housing 20 on others Place on the film 1 is on the mounting plate 3 below the Hairbrushes 33, 34 a not shown, secured by a sieve or fleece Suction opening provided, to which a in Fig. 1 only schematically indicated exhaust port 120 is flanged. The exhaust port 120 leads over a dust filter 80 to a suction fan 90. The degree of pollution of the Dust filter 80, which can be designed as a vacuum cleaner bag, is replaced by a Sensor 100 monitors and visually signals. Of course there are Aggregates 80 and 90 - contrary to the diagram in Fig. 1 - within the closed housing 20, on the same side as the drive motors 61 and 71 behind the mounting plate 3, which the housing 20 like a partition divided.

Nach Hindurchtritt durch die erste Trockenreinigungsstation 30 wird der Film 1 mittels zweier weiterer Umlenkrollen 5, 6 um etwa 180° in seiner Laufrichtung umgekehrt und einer zweiten Trockenreinigungsstation 40 zugeführt. Zwischen den Umlenkrollen 5, 6 befindet sich ein mit dem Film 1 in dauernder Berührung stehender Endschalter 7, welcher einen Filmriß detektiert und ein entsprechendes Sensorsignal den Antriebsmotoren 61 und 71 zuführt. Die Antriebsmotoren 61 und 71 werden bei der Detektion eines Filmrisses unverzüglich stillgesetzt, so daß der Filmtransport durch die Capstanrolle 70 und die Aufwickelrolle 60 gestoppt wird.After passing through the first dry cleaning station 30, the film 1 by means of two further deflection rollers 5, 6 by about 180 ° in its running direction vice versa and fed to a second dry cleaning station 40. Between Deflection rollers 5, 6 are in constant contact with the film 1 standing limit switch 7, which detects a film tear and a corresponding Sensor signal supplies the drive motors 61 and 71. The drive motors 61 and 71 are stopped immediately upon detection of a film tear, so that the Film transport through the capstan roll 70 and the take-up roll 60 is stopped.

Die zweite Trockenreinigungsstation 40 besteht im dargestellten Beispielsfall aus zwei, auf jeweils einer Filmoberfläche angreifenden Kleberollen 41, 42. Die von Zeit zu Zeit auszuwechselnde Klebeschicht auf den Oberflächen der Kleberollen 41, 42 entfernt durch ihre Klebewirkung restliche Staub- und Schmutzpartikel von beiden Filmoberflächen. Anstelle von Kleberollen können auch Rollen mit dielektrischem Oberflächenmaterial verwendet werden, welche durch elektrostatische Aufladung die restlichen Staub- und Schmutzpartikel von beiden Filmoberflächen entfernen.The second dry cleaning station 40 consists in the example shown two, each on a film surface attacking adhesive rollers 41, 42. Die von Adhesive layer to be replaced from time to time on the surfaces of the adhesive rollers 41, 42 removes residual dust and dirt particles from two film surfaces. Instead of adhesive rolls, rolls with dielectric Surface material can be used, which by electrostatic Charge the remaining dust and dirt particles from both film surfaces remove.

Für nur leicht verschmutzte Filme 1 kann es ausreichen, den Film 1 nur durch die erste Trockenreinigungsstation 30 hindurchzuleiten. In diesem Falle wird der Film 1 unter Umgehung der Kleberollen 41, 42 über eine Shuntrolle 4 direkt zu einer weiteren Umlenkrolle 51 geführt, die in der Filmbahn hinter der zweiten Kleberolle 42 angeordnet ist. Die Umlenkrolle 51 bildet zusammen mit einer weiteren Umlenkrolle 52 eine Umschlingungsrollenpaar 50. Hinter der Rolle 51 und vor der Rolle 52 ist die Capstanrolle 70 angeordnet. Das Umschlingungsrollenpaar 50 sorgt einerseits dafür, daß der Film 1 über einen Umfangswinkel von mehr als 180° auf der Reiboberfläche der Capstanrolle 70 anliegt. Andererseits wird der Film 1 durch die Umschlingungswirkung aller drei Rollen 51, 70 und 52 gespannt, wodurch der Schlupf zwischen Film 1 und der Reiboberfläche der Capstanrolle 70 minimiert wird. Nach Passieren des Umschlingungsrollenpaares 50 wird der Film 1 der Aufwickelrolle 60 als Filmwickel 65 zugeführt. Zur exakten Filmführung wird der Filmwickel 65 durch eine Andruckrolle 62 in radialer Richtung mit einer Andruckkraft beaufschlagt. Die Andruckrolle 62 ist an einem Schwenkarm 63 frei drehbar gelegert, welcher um eine Schwenkachse 64 gegebenenfalls unter der Vorspannkraft einer nicht gezeigten Feder schwenkbar ist.For only slightly soiled films 1, it may be sufficient to use film 1 only through the to pass first dry cleaning station 30. In this case the film 1 bypassing the adhesive rollers 41, 42 via a shunt roller 4 directly to one another deflection roller 51, which is in the film path behind the second adhesive roller 42 is arranged. The deflection roller 51 forms together with another Deflection roller 52 a pair of wrapping rollers 50. Behind the roller 51 and in front of the Roll 52, the capstan roll 70 is arranged. The pair of wrapping rollers 50 provides on the one hand for the film 1 to have a circumferential angle of more than 180 ° abuts the friction surface of the capstan roller 70. On the other hand, the film 1 is through the wrap effect of all three rollers 51, 70 and 52 tense, which the Slip between film 1 and the friction surface of capstan roller 70 is minimized becomes. After passing the pair of wrapping rollers 50, the film 1 becomes the Winding roll 60 fed as film roll 65. For exact film management, the Film roll 65 by a pressure roller 62 in the radial direction with a Pressure force applied. The pressure roller 62 is free on a swivel arm 63 rotatably mounted, which if necessary under a pivot axis 64 Preload force of a spring, not shown, is pivotable.

Der Antriebsmotor 61 wird in seiner Drehzahl von einer nicht gezeigten Steuerung derart geregelt, daß die Zugkraft, welche von der Antriebsrolle 60 auf den Film 1 ausgeübt wird, über den gesamten Durchmesser des Filmwickels 65 gleichmäßig und konstant bleibt. Ohne eine derartige Zugkraftregelung würde mit steigenden Durchmesser des Filmwickels 65 die Zugkraft entsprechend ansteigen, was gleichbedeutend mit einem Anwachsen der Gefahr eines Filmrisses wäre. Bei den zu reinigenden Filmen 1 handelt es sich oftmals um sehr alte und daher entsprechend verschmutzte Filme, bei denen aufgrund der Alterung des Filmmaterials und zahlreicher Klebestellen die ursprüngliche Elastizität und Zugfestigkeit stark verringert ist. Insbesondere diese alten Filme lassen sich mit Hilfe der erfindungsgemäßen Filmreinigungsvorrichtung ohne Gefahr von Filmrissen reinigen. Durch die ausschließliche Trockenreinigung mittels der Einrichtungen 30 und 40 ist einerseits eine wirksame Entfernung aller Schmutz- und Staubpartikel und andererseits eine das wertvolle Filmmaterial extrem schonende Reinigung gewährleistet. Im Gegensatz zu der aus dem Stand der Technik bekannten, anfänglichen Naßreinigung ist bei der erfindungsgemäßen Reinigungsvorrichtung ein Verschmieren der Schmutzpartikel auf der Filmoberfläche oder ein Ablösen von Klebestellen völlig ausgeschlossen.The speed of the drive motor 61 is controlled by a controller (not shown) regulated in such a way that the tensile force exerted by the drive roller 60 on the film 1 is exercised evenly over the entire diameter of the film roll 65 and remains constant. Without such a traction control would increase Diameter of the film roll 65 increase the tensile force accordingly, which is synonymous would increase with the risk of a film tear. With the too cleaning films 1 are often very old and therefore appropriate dirty films where due to the aging of the footage and numerous Glue points greatly reduced the original elasticity and tensile strength is. In particular, these old films can be made with the help of the invention Clean the film cleaning device without the risk of film tears. By the exclusive Dry cleaning by means of the devices 30 and 40 is one hand effective removal of all dirt and dust particles and on the other hand a that valuable film material ensures extremely gentle cleaning. In contrast to the initial wet cleaning known from the prior art is in the cleaning device according to the invention a smearing of the dirt particles on the film surface or peeling off of adhesive spots completely impossible.

Claims (6)

  1. Device for cleaning exposed films (1)with
    an initial dry cleaning station (30) in the form of an ionizing unit, which has an electrostatic discharge device (31, 32) and a means (33, 34) of removing discharged dust particles;
    where necessary, a second dry cleaning station (40), which removes dirt and dust particles from both film surfaces by adhesion or electrostatic attraction;
    a capstan roller (70) to draw the film (1) from an unwinding roller (10) through the dry cleaning station(s), and
    a film winding roller (60) downstream of the capstan roller (70) with a drive motor (61);
    characterised by the fact that a control is provided for the drive motor (61), which regulates the tensile force exerted by the drive roller (60) on the film (1) such that the tensile force remains uniform and constant over the entire diameter of the film winding roller (60), and the reversing rollers (51, 52) are provided directly in front of and behind the capstan roller (7)), to wind the film (1) around a large part of the circumference of the capstan roller (70).
  2. Device in accordance with claim 1, characterised by the fact that a limit switch is provided just in front of the dry cleaning station (40) in the film path, to detect any tear in the film and take action on the drive motors (61, 71) of the film-winding roller (60) and the capstan roller (70).
  3. Device in accordance with claims 1 or 2, characterised by the fact that a shunt roller (4) is provided between the second dry cleaning station (40) and the capstan roller (70), by means of which the film (1) can be fed to bypass the second dry cleaning station (40).
  4. Device in accordance with claims 1 to 3, characterised by the fact that the film winding roller (10) and the unwinding roller (60) are arranged in the same plane, whereby the film (1') can be unwound directly between two rollers (10, 60), bypassing the drying stations (30,40).
  5. Device in accordance with claims 1 to 3, characterised by the fact that inside the housing (20), an extraction device (90) is fitted with a dust filter (80) connected upstream to handle the dirt and dust particles brushed away in the initial drying station (30).
  6. Device in accordance with claim 5, characterised by the fact that the degree of soiling of the dust filter (80) is detected by a sensor (100) and displayed.
EP95106858A 1995-05-05 1995-05-05 Device for cleaning exposed films Expired - Lifetime EP0741328B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE59510296T DE59510296D1 (en) 1995-05-05 1995-05-05 Device for cleaning exposed films
AT95106858T ATE221216T1 (en) 1995-05-05 1995-05-05 DEVICE FOR CLEANING EXPOSED FILM
EP95106858A EP0741328B1 (en) 1995-05-05 1995-05-05 Device for cleaning exposed films
AU52014/96A AU710529B2 (en) 1995-05-05 1996-05-01 Apparatus for dry cleaning exposed films
US08/641,829 US5713102A (en) 1995-05-05 1996-05-02 Apparatus for dry cleaning exposed films

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95106858A EP0741328B1 (en) 1995-05-05 1995-05-05 Device for cleaning exposed films

Publications (2)

Publication Number Publication Date
EP0741328A1 EP0741328A1 (en) 1996-11-06
EP0741328B1 true EP0741328B1 (en) 2002-07-24

Family

ID=8219230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95106858A Expired - Lifetime EP0741328B1 (en) 1995-05-05 1995-05-05 Device for cleaning exposed films

Country Status (5)

Country Link
US (1) US5713102A (en)
EP (1) EP0741328B1 (en)
AT (1) ATE221216T1 (en)
AU (1) AU710529B2 (en)
DE (1) DE59510296D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6678913B1 (en) 2000-09-01 2004-01-20 San Lab Systems Apparatus and method for cleaning film
CN103111442B (en) * 2013-02-27 2015-04-29 江苏华兰药用新材料股份有限公司 Film washer
CN106984567A (en) * 2017-03-29 2017-07-28 浙江凯阳新材料股份有限公司 A kind of film production dust arrester

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956300A (en) * 1956-09-17 1960-10-18 Oxy Dry Sprayer Corp Web tensioning and cleaning apparatus
NL299320A (en) * 1962-10-22
US3531201A (en) * 1968-04-11 1970-09-29 Hycon Mfg Co Preprocessor
JPS5322415A (en) * 1976-08-13 1978-03-01 Canon Inc Motor con trol device for camera able to record sound simultaneously
US4244078A (en) * 1979-04-26 1981-01-13 Research Technology, Inc. Method and apparatus for cleaning film
US4454621A (en) * 1982-01-15 1984-06-19 Static Inc. Sheet and web cleaner
US4656530A (en) * 1985-11-25 1987-04-07 American Multimedia, Inc. Method and apparatus for servo-control of tape tension in high speed tape transporter
US5349713A (en) * 1992-11-25 1994-09-27 Jerome P. Stimpfl Magnetic tape cleaning system
DE9319373U1 (en) * 1993-12-16 1994-08-11 Schmitzer Andreas Device for cleaning exposed films

Also Published As

Publication number Publication date
DE59510296D1 (en) 2002-08-29
EP0741328A1 (en) 1996-11-06
AU710529B2 (en) 1999-09-23
ATE221216T1 (en) 2002-08-15
US5713102A (en) 1998-02-03
AU5201496A (en) 1996-11-14

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