EP0741328A1 - Dispositif pour le nettoyage de films exposés - Google Patents

Dispositif pour le nettoyage de films exposés Download PDF

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Publication number
EP0741328A1
EP0741328A1 EP95106858A EP95106858A EP0741328A1 EP 0741328 A1 EP0741328 A1 EP 0741328A1 EP 95106858 A EP95106858 A EP 95106858A EP 95106858 A EP95106858 A EP 95106858A EP 0741328 A1 EP0741328 A1 EP 0741328A1
Authority
EP
European Patent Office
Prior art keywords
film
roll
dry cleaning
roller
cleaning station
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.)
Granted
Application number
EP95106858A
Other languages
German (de)
English (en)
Other versions
EP0741328B1 (fr
Inventor
Andreas Schmitzer
Ingrid Manewald
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP95106858A priority Critical patent/EP0741328B1/fr
Priority to DE59510296T priority patent/DE59510296D1/de
Priority to AT95106858T priority patent/ATE221216T1/de
Priority to AU52014/96A priority patent/AU710529B2/en
Priority to US08/641,829 priority patent/US5713102A/en
Publication of EP0741328A1 publication Critical patent/EP0741328A1/fr
Application granted granted Critical
Publication of EP0741328B1 publication Critical patent/EP0741328B1/fr
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
    • 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 German utility model DE-9 319 373.
  • German utility model DE-9 319 373 For cleaning exposed, more or less heavily soiled films, it is known from German utility model DE-9 319 373 to first pull the film through an immersion bath in order to remove a large part of the adhering dirt there. The film is then dried using warm air and then subjected to electrostatic cleaning, in which the loose dust particles adhering due to electrostatic charge are discharged and brushed off. Electrostatic dry cleaning is followed by a further dry cleaning step using adhesive rollers, which remove the remaining dust and dirt particles from the film surface with their adhesive surfaces.
  • the object of the invention is to improve a film cleaning device of the type mentioned in such a way that a safe winding of the cleaned film is ensured with a satisfactory cleaning effect.
  • the invention is based initially on the knowledge that adequate cleaning, even of heavily soiled films, is only possible by dry cleaning.
  • 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 slightly dirty films.
  • the second dry cleaning station can be bypassed using a shunt roller.
  • the lack of a wet cleaning step means that the coefficient of friction of the film surface fluctuates less than with wet cleaning followed by film drying, it has been shown that that the sole drive of the film by a capstan roller is not sufficient to get a grip on winding problems connected 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.
  • 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. 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.
  • a further equalization of the tensile force exerted on the film can preferably be achieved in that the capstan roller is preceded by two deflection rollers which ensure sufficient film wrap around the capstan roller, thus minimizing the slippage between the film and the capstan roller.
  • the film cleaning device for an exposed film 1, in particular cinema film, illustrated in FIG. 1 in a schematic side view, has a closed housing 20 with a mounting plate 3, which is set up parallel to the drawing plane in the vertical direction.
  • the device components accommodated in the housing 20 are fastened to the mounting plate 3.
  • an unwinding roll 10 is freely rotatably mounted, which is provided with a roll brake, not shown, so that the film roll 12 applied to the roll 10 must be unwound with a defined tensile force.
  • this tractive force is applied jointly by the drive motor 71 of a capstan roller 70 and the drive motor 61 of a winding roller 60.
  • the take-up roll 60 is arranged vertically above the take-off roll 10, which has the advantage that the cleaning device can also be used for rewinding the film 1 (which is denoted by 1 'in this operating mode).
  • the film web provided during rewinding is shown in FIG. 1 with a broken line.
  • the film is guided in a film guide plane, which coincides with the drawing plane of FIG. 1, from the unwinding roll 10 via a deflection roll 2 vertically upwards to a first dry cleaning station 20, which is designed as an ionization device.
  • the ionization device comprises two rod-shaped discharge devices 31, 32 which are arranged on opposite film surfaces and are electrically fed by a common high-voltage power supply. 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 brushed off when the film 1 is transported with the aid of soft hairbrushes 33, 34 which are directed against the two film surfaces.
  • a suction opening (not shown) secured by a sieve or fleece is provided on the mounting plate 3 below the hairbrushes 33, 34 which is only schematic in FIG. 1 indicated exhaust port 120 is flanged.
  • the exhaust port 120 leads to a suction fan 90 via a dust filter 80.
  • the degree of contamination of the dust filter 80 which can be designed as a vacuum cleaner bag, is monitored by a sensor 100 and signaled optically.
  • the units 80 and 90 - contrary to the diagram in FIG. 1 - are located within the closed housing 20, on the same side as the drive motors 61 and 71 behind the mounting plate 3, which divides the housing 20 like a partition.
  • the film 1 After passing through the first dry cleaning station 30, the film 1 is reversed by approximately 180 ° in its running direction by means of two further deflecting rollers 5, 6 and fed to a second dry cleaning station 40. Between the deflection rollers 5, 6 there is a limit switch 7 which is in constant contact with the film 1 and which detects a film tear and supplies a corresponding sensor signal to 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 roller 70 and the winding roller 60 is stopped.
  • the second dry cleaning station 40 consists of two pinch rollers 41, 42, each of which acts on a film surface.
  • the adhesive layer on the surfaces of the adhesive rollers 41, 42 that is to be replaced from time to time removes residual dust and dirt particles from both film surfaces due to their adhesive effect.
  • rolls with dielectric surface material can also be used, which remove the remaining dust and dirt particles from both film surfaces by electrostatic charging.
  • the film 1 becomes a bypassing the adhesive rollers 41, 42 via a shunt roller 4 guided further deflection roller 51 which is arranged in the film web behind the second adhesive roller 42.
  • the deflection roller 51 forms, together with a further deflection roller 52, a pair of wrapping rollers 50.
  • the capstan roller 70 is arranged behind the roller 51 and in front of the roller 52.
  • the pair of wrapping rollers 50 on the one hand ensures that the film 1 lies over a circumferential angle of more than 180 ° on the friction surface of the capstan roller 70.
  • the film 1 is tensioned by the wrapping action of all three rollers 51, 70 and 52, whereby the slip between film 1 and the friction surface of the capstan roller 70 is minimized.
  • the film 1 is fed to the take-up roll 60 as a film roll 65.
  • the film roll 65 is acted upon by a pressure force in the radial direction by a pressure roller 62.
  • the pressure roller 62 is freely rotatably mounted on a swivel arm 63, which can be swiveled about a swivel axis 64 under the pretensioning force of a spring, not shown.
  • the drive motor 61 is regulated in its speed by a control, not shown, in such a way that the tensile force exerted by the drive roller 60 on the film 1 remains uniform and constant over the entire diameter of the film roll 65. Without such a tensile force control, the tensile force would increase correspondingly with increasing diameter of the film roll 65, which would mean an increase in the risk of a film tear.
  • the films 1 to be cleaned are often very old and therefore appropriately soiled films, in which the original elasticity and tensile strength are greatly reduced due to the aging of the film material and numerous adhesive points. These old films in particular can be cleaned with Hilde's film cleaning device according to the invention without the risk of film tears.
  • the exclusive dry cleaning by means of the devices 30 and 40 ensures on the one hand an effective removal of all dirt and dust particles and on the other hand an extremely gentle cleaning of the valuable film material is guaranteed.
  • the initial wet cleaning known from the prior art in the cleaning device according to the invention completely prevents smearing of the dirt particles on the film surface or detachment of adhesive spots.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cleaning In General (AREA)
  • Detergent Compositions (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Cleaning Or Drying Semiconductors (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
EP95106858A 1995-05-05 1995-05-05 Dispositif pour le nettoyage de films exposés Expired - Lifetime EP0741328B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP95106858A EP0741328B1 (fr) 1995-05-05 1995-05-05 Dispositif pour le nettoyage de films exposés
DE59510296T DE59510296D1 (de) 1995-05-05 1995-05-05 Vorrichtung zum Reinigen von belichteten Filmen
AT95106858T ATE221216T1 (de) 1995-05-05 1995-05-05 Vorrichtung zum reinigen von belichteten filmen
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 (fr) 1995-05-05 1995-05-05 Dispositif pour le nettoyage de films exposés

Publications (2)

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

Family

ID=8219230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95106858A Expired - Lifetime EP0741328B1 (fr) 1995-05-05 1995-05-05 Dispositif pour le nettoyage de films exposés

Country Status (5)

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

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 (zh) * 2013-02-27 2015-04-29 江苏华兰药用新材料股份有限公司 洗膜机
CN106984567A (zh) * 2017-03-29 2017-07-28 浙江凯阳新材料股份有限公司 一种薄膜生产用除尘装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4148570A (en) * 1976-08-13 1979-04-10 Canon Kabushiki Kaisha Motor control device for sound motion picture camera
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
DE9319373U1 (de) * 1993-12-16 1994-08-11 Schmitzer, Andreas, 93309 Kelheim Vorrichtung zum Reinigen von belichteten Filmen

Family Cites Families (6)

* 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 (fr) * 1962-10-22
US3531201A (en) * 1968-04-11 1970-09-29 Hycon Mfg Co Preprocessor
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
US5349713A (en) * 1992-11-25 1994-09-27 Jerome P. Stimpfl Magnetic tape cleaning system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4148570A (en) * 1976-08-13 1979-04-10 Canon Kabushiki Kaisha Motor control device for sound motion picture camera
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
DE9319373U1 (de) * 1993-12-16 1994-08-11 Schmitzer, Andreas, 93309 Kelheim Vorrichtung zum Reinigen von belichteten Filmen

Also Published As

Publication number Publication date
EP0741328B1 (fr) 2002-07-24
AU710529B2 (en) 1999-09-23
DE59510296D1 (de) 2002-08-29
AU5201496A (en) 1996-11-14
ATE221216T1 (de) 2002-08-15
US5713102A (en) 1998-02-03

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