US3595160A - Film strip processing device - Google Patents

Film strip processing device Download PDF

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Publication number
US3595160A
US3595160A US833584A US3595160DA US3595160A US 3595160 A US3595160 A US 3595160A US 833584 A US833584 A US 833584A US 3595160D A US3595160D A US 3595160DA US 3595160 A US3595160 A US 3595160A
Authority
US
United States
Prior art keywords
tank
film
guiding member
set forth
neck portion
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
US833584A
Other languages
English (en)
Inventor
Hendrik Jan Mensinga
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.)
Nv Optische Industrie De Dude Delft
OPTISCHE IND DE DUDE DELFT NV
Original Assignee
OPTISCHE IND DE DUDE DELFT NV
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 OPTISCHE IND DE DUDE DELFT NV filed Critical OPTISCHE IND DE DUDE DELFT NV
Application granted granted Critical
Publication of US3595160A publication Critical patent/US3595160A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03D3/00—Liquid processing apparatus involving immersion; Washing apparatus involving immersion
    • G03D3/02—Details of liquid circulation
    • G03D3/04—Liquid agitators
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D3/00—Liquid processing apparatus involving immersion; Washing apparatus involving immersion
    • G03D3/08—Liquid processing apparatus involving immersion; Washing apparatus involving immersion having progressive mechanical movement of exposed material
    • G03D3/13—Liquid processing apparatus involving immersion; Washing apparatus involving immersion having progressive mechanical movement of exposed material for long films or prints in the shape of strips, e.g. fed by roller assembly
    • G03D3/135—Liquid processing apparatus involving immersion; Washing apparatus involving immersion having progressive mechanical movement of exposed material for long films or prints in the shape of strips, e.g. fed by roller assembly fed between chains or belts, or with a leading strip

Definitions

  • the invention relates to a device for processing film strips which comprises at least one tank for containing a processing solution, in which a film guiding member is mounted provided with guide rollers along which the film is continuously fed in the form of a loop.
  • Such devices are already well known in the art. They have, as a rule, a moderate processing rate. However, for many purposes it is essential to speed up as much as possible the developing process of exposed films. The time required for accomplishing development and fixation appears to be shorter the more elevated the temperature of the developing and fixing solution is. However, if this temperature is increased too much, fogging occurs on the film. It also appears that the processing time is dependent on the rate of agitation of the solution. By such agitation a continuous flow of fresh developing'agent is supplied to the film surface. So, development and fixation times can be minimized by using either strongly elevated temperatures, which might result in the appearance of fog on the film, or by applying a less elevated temperature so as to prevent fogging, combined with an intense agitation of the processing solution.
  • a high processing rate is achieved by guiding the film along a portion of the circum ference of a whirling drum, another. portion of which is suspended in the processing solution which has an increased temperature.
  • the solutioncarried around the circumference of the drum is applied against the relatively slowly passing film.
  • the processing agent at the film surface will be more rapidly refreshed in comparison with the first mentioned devices in which more conventional agitation means, such as stirrers, are used.
  • a drawback of the rotating drum processor is the considerably greater loss of processing solution. due to evaporation and oxidation by air as compared with the conventional devices having processing tanks. Further, this device is unsuitable for use in airplanes because of the free liquid level. Finally, the evaporation of the processing solution can present other difficulties, e.g. when the solution contains poisonous agents as it is the case in some so-callcd monobath mixtures. These are solutions in which the film is simultaneously developed and fixed.
  • FIG. I is a cross-sectional view of the device according to the invention.
  • FIG. 2. is a perspective view of the film guiding member
  • FIG, 3 is a detail of the film guiding member.
  • the lever 14 near its pivot has circular side edges whose center lies at the center of rotation 15 and these edges tightly cooperate with two vertical strips 25 and 25 to form an effective liquid sealing.
  • rollers 4] and 41' are mounted which are next-adjacent the rollers 5 and 5, respectively, when the film guide member is lowered into the tank I
  • roller 42 At its lower end the film guide part 11 is provided with a roller 42. This roller system keeps the film stretched on the film guide 10, 11 when the device is in operation.
  • the width of the developing tank I is so selected, that the film guide 10, 11 on either side moves closely along the front and rear walls, thus more or less dividing the tank into two compartments.
  • the oscillating movement of the film guide part II will produce strong variations in the height of the liquid level in the neck 3 on both sides of the film guide.
  • the portion 3 is locally widened at one side, thus forming a bypass 43 through'which the solution can flew back from one side-of the guiding member to the other.
  • partition screens 44 and 44 are mounted over the heating element 6 and the thermostat 7.
  • the cooling water flowing through-the cooler 8 is used afterwards as washing liquid in the washing tank 2.
  • the film' is threaded through the tank 2. in four loops and-finally passes a squeegee 45 when leaving the tank 2.
  • Thesprocket 34 and the winding spool 35 are also driven by the electric motor 17 What I claim is:
  • Device for processing film strips which comprises at leastone tank for containing a processing solution, in which a film which the film is continuously fed in the form of a loop,
  • processing tank has a relatively narrow neck portion at its top through which the film strip is fed into and out of the tank and a wider lower portion for receiving the film loop
  • the device further being provided with driving means for giving that part of the film guiding member which projects into the wider portion of the tank an Oscillating movement about an axis positioned closely to the connection between the narrow neck portion and the wider lower portion of the tank.
  • the driving means comprises a lever pivotally supported by said fixed part of the film guiding member, the lever engaging at one end said pivotahle part of the film guiding member, and projecting at its other end through a slot in said cover.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
  • Transmission Devices (AREA)
  • Photographic Developing Apparatuses (AREA)
US833584A 1968-06-28 1969-06-16 Film strip processing device Expired - Lifetime US3595160A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6809126A NL6809126A (enrdf_load_stackoverflow) 1968-06-28 1968-06-28

Publications (1)

Publication Number Publication Date
US3595160A true US3595160A (en) 1971-07-27

Family

ID=19804019

Family Applications (1)

Application Number Title Priority Date Filing Date
US833584A Expired - Lifetime US3595160A (en) 1968-06-28 1969-06-16 Film strip processing device

Country Status (7)

Country Link
US (1) US3595160A (enrdf_load_stackoverflow)
CH (1) CH504701A (enrdf_load_stackoverflow)
DE (1) DE1932819A1 (enrdf_load_stackoverflow)
FR (1) FR2014373A1 (enrdf_load_stackoverflow)
GB (1) GB1238085A (enrdf_load_stackoverflow)
NL (1) NL6809126A (enrdf_load_stackoverflow)
SE (1) SE345529B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5447170A (en) * 1993-10-27 1995-09-05 Magnasonics, Inc. Apparatus for cleaning film

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK156099C (da) * 1980-05-07 1989-11-06 Eskofot As Fremgangsmaade ved fremkaldelse

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2133535A (en) * 1934-11-26 1938-10-18 Anonima Minerva Soc Treatment of schappe thread bands of artificial silk, and apparatus therefor
US2354225A (en) * 1943-09-13 1944-07-25 Harold F Stiffler Developing tank
US3235932A (en) * 1959-06-16 1966-02-22 Elastic Fabric Co Inc Combined apparatus for shrinking fabric

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2133535A (en) * 1934-11-26 1938-10-18 Anonima Minerva Soc Treatment of schappe thread bands of artificial silk, and apparatus therefor
US2354225A (en) * 1943-09-13 1944-07-25 Harold F Stiffler Developing tank
US3235932A (en) * 1959-06-16 1966-02-22 Elastic Fabric Co Inc Combined apparatus for shrinking fabric

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5447170A (en) * 1993-10-27 1995-09-05 Magnasonics, Inc. Apparatus for cleaning film

Also Published As

Publication number Publication date
CH504701A (de) 1971-03-15
SE345529B (enrdf_load_stackoverflow) 1972-05-29
FR2014373A1 (enrdf_load_stackoverflow) 1970-04-17
NL6809126A (enrdf_load_stackoverflow) 1969-12-30
DE1932819A1 (de) 1970-01-15
GB1238085A (enrdf_load_stackoverflow) 1971-07-07

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