EP0035012B1 - A machine for developing picture material - Google Patents

A machine for developing picture material Download PDF

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Publication number
EP0035012B1
EP0035012B1 EP79900929A EP79900929A EP0035012B1 EP 0035012 B1 EP0035012 B1 EP 0035012B1 EP 79900929 A EP79900929 A EP 79900929A EP 79900929 A EP79900929 A EP 79900929A EP 0035012 B1 EP0035012 B1 EP 0035012B1
Authority
EP
European Patent Office
Prior art keywords
picture material
liquid
members
machine
cylindrical member
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
Application number
EP79900929A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0035012A1 (en
Inventor
Olov Eng
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
Publication of EP0035012A1 publication Critical patent/EP0035012A1/en
Application granted granted Critical
Publication of EP0035012B1 publication Critical patent/EP0035012B1/en
Expired 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
    • G03D5/00—Liquid processing apparatus in which no immersion is effected; Washing apparatus in which no immersion is effected
    • G03D5/06—Applicator pads, rollers or strips
    • G03D5/067—Rollers

Definitions

  • the invention refers to a machine for developing picture material.
  • US-A-3 453 944 describes a picture processing machine which comprises a plurality of process liquid supply means arranged to supply different process liquids to different areas along the length of a drum which rotates about a mainly horizontal axis thereby to carry said liquids to the upper part of the drum.
  • a reel At each end of the drum there is provided a reel and the picture material to be processed is transferred between said reels in such a manner that the picture material is drawn over the surface of the drum in parallel with the drum's axis of rotation and with its emulsion layer in contact with the process liquids on the drum, said picture material being held against the upper part of the drum along its entire length by means of a curved shoe conforming to the shape of the drum and being designed as an air bearing.
  • the arrangement with the picture material being moved longitudinally over the drum and with its surface curved to conform to the upper part of the drum is complex and the requirement of air bearings makes the machine rather expensive, whereas yet the guiding of the picture material is unreliable and inexact.
  • US-A-2 241 104 describes another type of picture processing machine, which has a single liquid tank with a drum rotatably arranged therein about a horizontal axis.
  • the drum as it rotates draws up process liquid to its upper surface and the picture material is led via a number of stationary guiding rollers transversely over the surface of the drum and in contact with the liquid drawn up by the drum rotation.
  • the drawback with this machine is that it necessitates a replacement of the liquid and rinsing of the tank between the use of each consecutive process liquid and that the machine is thereby slow in use, although the guiding of the picture material can be considered reliable.
  • the purpose of the invention is to present a machine for developing picture material and of the type comprising an elongated tank, partition means to subdivide said tank in the longitudinal direction into a plurality of receptacles for different process liquids, a cylindrical member partially immersed in the liquid in each tank and rotatably mounted on a driven shaft about a substantially horizontal axis so that rotation of said cylindrical member produces a liquid film on the upper surface thereof, said cylindrical members being coaxially aligned, and conveying the picture material with one surface thereof into contacting engagement with said liquid film surface on said cylindrical members, and which machine provides the advantages of the abovementioned US-A-3 453 944 while at the same time difficulties of guiding the picture material experienced with the machine according to said patent have been solved.
  • the machine is comparatively inexpensive to manufacture and to service.
  • said machine incorporates two driven elongated conveyor shafts rotatably mounted adjacent the outer surface of said cylindrical members with their longitudinal axes of rotation in parallel with the rotational axis of said cylindrical member and extending along the entire length of said cylindrical members, picture material mounting means on said conveyor shafts to mount said picture material in continuous strip form so that said picture material can be transferred between said mounting means in contacting engagement with said liquid film surface on a cylindrical member, and said mounting means being movable axially along said conveyor shafts so that said strip-form picture material can be transferred along the entire length of the said cylindrical members from one cylindrical member to another to successively treat it with said different process liquids in said receptacles.
  • Figure 1 there is shown in a view from above a tank 1, which is subdivided into a plurality of smaller tanks or receptacles 2, which are defined by the tank walls and by movable partition walls 3, which can be inserted in a leakproof manner in optional positions along the tank length and perpendicularly thereto, the receptacles 2 are each one provided with a cylinder 4 arranged therein and these cylinders are rotatable with a shaft 5, which is preferably common for all cylinders and which is driven by a driving device 6, which e.g. could be an electric motor.
  • a driving device 6 which e.g. could be an electric motor.
  • the shaft is supported in bearings 7 at suitable positions and the shaft portions associated with each cylinder preferably are exchangeable by aid of not shown devices whereby it is possible by moving one or more partition walls 3 from one to another position and by exchange of one or more cylinders 4 against other cylinders of bigger or smaller length to bring about an adjustment of the process time for each receptacle in the tank 1.
  • Figure 2 is shown in a schematic perspective view an embodiment of the development machine according to the invention.
  • the cylinders 4 are immersed only partly in the liquid in each receptacle, said liquid having a level 8.
  • the different process liquids in the receptacles can be varied in relation to the objects to be developed and if it concerns colour or monochrome prints.
  • first two receptacles can contain different developing liquids
  • the third receptacle can contain a fixing liquid whereas the last receptacle ordinarily contains rinsing water. All these liquids must, for obtaining a satisfactory development result be maintained at a certain temperature which must be uniform through the liquid volume in each receptacle, and this can easily be brought about with use of different types of heating and/or cooling devices which are located e.g. in the bottom of each receptacle.
  • each receptacle As the liquid quantity is comparatively small in each receptacle is it ascertained that the energy requirement for the temperature adjustment will be low.
  • Between the adjacent receptacles can be arranged devices which prevent mixing of the liquids e.g. drops of liquid from a receptacle with development liquid to a receptacle with a fixing solution, and these devices can be designed as scrapers fitted at the rear end of each cylinder, as air curtains or shower devices between the receptacles. Such devices are not shown in the drawings.
  • the machine incorporates a tank 1, which is subdivided in a number of receptacles 2 for process liquids, rotatable cylinders 4 immersed in the liquid in the receptacles and not shown driving devices for rotating the cylinders.
  • the machine furthermore incorporates a transport device which is designed as two elongated side conveyor shafts 17, 18 which are parallel with the cylinder shaft 5.
  • the conveyor shafts 17, 18 are arranged one at each longitudinal side of the tank 1 and they are each intended to carry picture material mounting material in the form of pairs of spools 19, 20; 21, 22, which are aligned two and two and which are intended to contain photographic reel paper, which is to be wound between the two spools 19, 20; 21, 22 in each pair of spools, whereby the spools are arranged at such a level relative to the cylinder shaft 5 that the photographic paper track 23 will engage a curved envelope surface of the associated cylinder situated above the liquid level 8 in the tank.
  • the cylinders are at the same time rotated in a manner described hereabove, whereby a liquid film will be carried along with the cylinder, and the paper track 23 with its emulsion surface will at its engagement against the cylinder envelope surface always contact one of the process liquids.
  • Both spools 17, 18 can be individually driven and disconnected for allowing winding of the paper track in both directions.
  • the spools 19, 20; 21, 22 are furthermore axially displaceable along the spool shafts, whereby they can be moved between the different receptacles and the paper track can thereby be brought in contact with the different liquids.
  • the spools 19, 20; 21, 22 can preferably be arranged to rotate with the spool shafts 17, 18 but to be axially displaceable thereon via splines or the like.
  • the spool shafts are furthermore preferably mounted in such a manner that they can be retracted from the tank, whereby the machine can be used for sheet film with another type of transport device.
  • the transport device is designed in such manner that the transport speed for the pictures to be developed can be varied.
  • By adjusting the speed and e.g. by altering the length of the cylinder and the receptacle respectively it is possible to modify the machine to a very high extent in rather a simple manner to any desired time of contact with the different liquids used in the development process.
  • the cylinders 4 are preferably provided with embossments or the like, along their envelope surface which will increase the ability of the cylinders during rotation to carry liquid to their upper surface where the pictures which are conveyed by the transport device will contact the liquid layer.
  • the machine according to the invention provides a simple and efficient development unit by aid of which the necessary liquid quantities can be limited at the same time as a machine is obtained, which is easy to clean and which furthermore requires only little space.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
EP79900929A 1979-08-10 1981-02-24 A machine for developing picture material Expired EP0035012B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE1979/000169 WO1981000465A1 (en) 1979-08-10 1979-08-10 A machine for development of exposed pictures

Publications (2)

Publication Number Publication Date
EP0035012A1 EP0035012A1 (en) 1981-09-09
EP0035012B1 true EP0035012B1 (en) 1985-06-12

Family

ID=20336972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79900929A Expired EP0035012B1 (en) 1979-08-10 1981-02-24 A machine for developing picture material

Country Status (5)

Country Link
EP (1) EP0035012B1 (enrdf_load_stackoverflow)
JP (1) JPS56501025A (enrdf_load_stackoverflow)
DE (1) DE2953773A1 (enrdf_load_stackoverflow)
GB (1) GB2070983B (enrdf_load_stackoverflow)
WO (1) WO1981000465A1 (enrdf_load_stackoverflow)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3453944A (en) * 1965-11-18 1969-07-08 Ingenuics Inc Transaxial processor

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB387781A (en) * 1931-11-13 1933-02-16 Halden & Company Ltd J Improvements in and relating to apparatus for performing developing and like operations on photographic prints
GB637784A (en) * 1946-03-12 1950-05-24 Joseph Hewitt Improvements in and relating to apparatus for processing strips of material such as photographic film
US3472144A (en) * 1966-04-07 1969-10-14 Oscar Fisher Film processing apparatus
GB1199733A (en) * 1966-10-21 1970-07-22 Lumiere Soc Photographic Developing Apparatus
JPS4929537U (enrdf_load_stackoverflow) * 1972-05-15 1974-03-14
CA1019187A (en) * 1973-07-02 1977-10-18 Eastman Kodak Company Tube processing apparatus for processing webs with a solution
NL177155C (nl) * 1975-01-13 1985-08-01 Oce Van Der Grinten Nv Inrichting voor het eenzijdig aanbrengen van een vloeistoflaag op een vel, voorzien van een geprofileerde rol.
US4025937A (en) * 1975-08-15 1977-05-24 Eastman Kodak Company Web transport apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3453944A (en) * 1965-11-18 1969-07-08 Ingenuics Inc Transaxial processor

Also Published As

Publication number Publication date
JPS56501025A (enrdf_load_stackoverflow) 1981-07-23
GB2070983A (en) 1981-09-16
DE2953773A1 (de) 1982-01-28
EP0035012A1 (en) 1981-09-09
WO1981000465A1 (en) 1981-02-19
GB2070983B (en) 1983-07-13

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