EP0101559B1 - Automatische Dosiervorrichtung für chemische Produkte in einer Entwicklungsmaschine - Google Patents

Automatische Dosiervorrichtung für chemische Produkte in einer Entwicklungsmaschine Download PDF

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Publication number
EP0101559B1
EP0101559B1 EP83106975A EP83106975A EP0101559B1 EP 0101559 B1 EP0101559 B1 EP 0101559B1 EP 83106975 A EP83106975 A EP 83106975A EP 83106975 A EP83106975 A EP 83106975A EP 0101559 B1 EP0101559 B1 EP 0101559B1
Authority
EP
European Patent Office
Prior art keywords
treatment vessel
pump
developing machine
electrovalve
program unit
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
EP83106975A
Other languages
English (en)
French (fr)
Other versions
EP0101559A3 (en
EP0101559A2 (de
Inventor
Franco Fracas
Roberto Marson
Primo Piccoli
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.)
Fotomec - San Marco SpA
Original Assignee
Fotomec - San Marco SpA
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 Fotomec - San Marco SpA filed Critical Fotomec - San Marco SpA
Publication of EP0101559A2 publication Critical patent/EP0101559A2/de
Publication of EP0101559A3 publication Critical patent/EP0101559A3/en
Application granted granted Critical
Publication of EP0101559B1 publication Critical patent/EP0101559B1/de
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
    • G03D3/00—Liquid processing apparatus involving immersion; Washing apparatus involving immersion
    • G03D3/02—Details of liquid circulation
    • G03D3/06—Liquid supply; Liquid circulation outside tanks
    • G03D3/065—Liquid supply; Liquid circulation outside tanks replenishment or recovery apparatus

Definitions

  • the invention is especially suited to automatically metering the exact quantity of chemical products required for regenerating a treatment bath in a vessel of a developing machine for photographic films and papers.
  • the regeneration of such baths is accomplished by calculating the surface area of the treated papers and by actuating, on the basis of the thus obtained information, a volumetric membrane pump for supplying one or several metered doses of chemical regenerating substances to the bath.
  • This known device suffers from various drawbacks mainly due to the long-term instability of the pump output (deterioration of the membrane, incrustation of the valves), to the insufficient metering accuracy and to adjustment difficulties (the pump output can only be varied by varying the stroke of the pump membrane).
  • the output of the width sensor and the feedback signal are input to the microcomputer which evaluates the area of the photosensitive material being processed.
  • the film width sensor may be comprised by a reflective infrared sensor array located above a feed table at the input slot of the film processing machine.
  • the pump is activated continuously on and off by the pump relay which in turn is energized by a signal from the microcomputer. A minimum pump operation time is required since control of the pump for a period less than the minimum operation time is difficult and likely to cause inaccuracy.
  • said pump means comprises a magnetically driven centrifugal pump always rotating when the developing machine is operated, and electrovalve connected to said electronic program unit is provided in the supply line from said pump means to said treatment vessel, a quantity of regenerating substances to the treatment vessel being controlled by actuating said electrovalve.
  • the advantage of this device is that due to its magnetic drive system the centrifugal pump is always rotating but supplies chemical substances from container to the vessel only when the electrovalve is open. This will enable a quick and accurate metering.
  • a container 1 for chemical regeneration substances is connected to a magnetically driven centrifugal pump 2 for supplying said substances to a treatment vessel 5 of a developing machine via a pulse counter 3 and an electrovalve 4.
  • An electronic program unit 6 including a memory is connected on the one hand to photocell sensor means 8 employed for sensing the quantity of paper 7 treated within vessel 5, and on the other hand, to pulse counter 3 and electrovalve 4.
  • the program unit 6 compares the informations relating to the treated paper as supplied by the photocell sensor means 8 to dates contained in the included memory, and at the proper time initiates a regeneration cycle by opening electrovalve 4. Thanks to its magnetic drive system, centrifugal pump 2 is always rotating, but supplies the chemical substances from container 1 to vessel 5 bnly when electrovalve 4 is open. The regeneration cycle is terminated as soon as the metered quantity of the chemical substance as indicated by the pulse counter 3 corresponds to the quantity required according to the program, the respective dates being stored in the memory of program unit 6.
  • Shown in fig. 2 of the drawings is a preferred embodiment of program unit 6, comprising a binary pulse counter 9 the input of which is controlled by the photocell sensor means 8 by means of a pulse train.
  • the output of counter 9, shown as a single output in fig. 2 controls the first input section 11 of a binary comparator 10, the other input section of which is controlled by one stage of the memory 13.
  • Memory 13, comprising for instance an integrated circuit type 2716 of Intel Corp., is adapted to generate at its output, shown as a single output in fig. 2, a binary reference number corresponding to the maximum quantity of paper that can be treated in tub 5 after each regeneration cycle.
  • Comparator 10 may for instance comprise an integrated circuit of the type 74C85 made by National Semiconductor Corp. and is in a per se known manner adapted to generate a logic output level "1" only when the binary numbers applied to its inputs 11 and 12 coincide.
  • comparator 10 controls a reset input of counter 9 and a control input 16 of a flipflop stage 14.
  • the output of flipflop stage 14 controls the electrovalve 4 and a reset and enable input of a binary pulse counter 15, and shows a logic level "1" when an identical level "1" is applied to its control input 16.
  • Counter 15 is substantially identical to counter 9 and is controlled by a pulse train generated by counter 3 (or flow meter) for generating at its output 17 a reset signal when the counted pulse number corresponds to the quantity of the chemical substance to be metered into tub 5.
  • the output 17 of counter 15 controls a corresponding reset input of flipflop stage 14.
  • the logic signal "1" at the output of flipflop stage 14 initiates, the opening of electrovalve 4 and simultaneously enables counter 15, which is always in its reset condition in the absence of said logic signal "1".
  • Counter 15 counts the pulses generated by counter 3, the operation of which is initiated by the opening of electrovalve 4.
  • counter 15 generates at its output a reset signal for flipflop stage 14, whereby the latter causes electrovalve 4 to be closed so as to terminate the regeneration cycle.
  • the described device may obviously undergo various modifications within the scope of the invention.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)

Claims (1)

  1. Vorrichtung zur automatischen Messung chemischer Produkte in einer Entwicklungsmaschine, insbesondere für die Lieferung regenerierender Substanzen aus einem Container (1) davon zu einem Behandlungsgefäß (5) der Maschine, wobei die Vorrichtung umfaßt:
    eine Pumpeinrichtung (2) für die Versorgung des Behandlungsgefäßes (5) mit regenerierenden Substanzen;
    einer Durchflußmeßeinrichtung (3) zur Überwachung der Menge der regenierenden Substanzen, die dem Behandlungsgefäß (5) zugeführt werden, und
    eine elektronische Programmeinheit (6), die einen Speicher (13) enthält und an eine Photozellensensoreinrichtung (8) zur Bestimmung der Fläche von Photopapier (7), das behandelt wird, und an die Durchflußmeßeinrichtung (3) angeschlossen ist,
    wobei die elektronische Programmeinheit (6), die Menge der dem Behandlungsgefäß (5) zugeführten regenerierenden Substanzen als Funktion der Fläche des behandelten Photopapiers (7) steuert,
    dadurch gekennzeichnet, daß die Pumpeinrichtung (2) eine während des Betriebs der Entwicklungsmaschine ständig rotierende magnetisch angetriebene Zentrifugalpumpe umfaßt, und ein Elektroventil (4), das an die elektronische Programmeinheit (6) angeschlossen ist, in der Versorgungsleitung von der Pumpeinrichtung (2) zu dem Behandlungsgefäß (5) vorgesehen ist, wobei die Menge der regenerierenden Substanzen für das Behandlungsgefäß (5) durch Betätigung des Elektroventils (4) gesteuert wird.
EP83106975A 1982-07-20 1983-07-15 Automatische Dosiervorrichtung für chemische Produkte in einer Entwicklungsmaschine Expired EP0101559B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT4572682 1982-07-20
IT45726/82A IT1159764B (it) 1982-07-20 1982-07-20 Dispositivo per il dosaggio automatico di prodotti chimici in macchine sviluppatrici

Publications (3)

Publication Number Publication Date
EP0101559A2 EP0101559A2 (de) 1984-02-29
EP0101559A3 EP0101559A3 (en) 1986-08-20
EP0101559B1 true EP0101559B1 (de) 1990-01-24

Family

ID=11257767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83106975A Expired EP0101559B1 (de) 1982-07-20 1983-07-15 Automatische Dosiervorrichtung für chemische Produkte in einer Entwicklungsmaschine

Country Status (3)

Country Link
EP (1) EP0101559B1 (de)
DE (1) DE3381151D1 (de)
IT (1) IT1159764B (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3000288A (en) * 1957-05-15 1961-09-19 Autolab Corp Apparatus and method for processing photographic elements
DE2207137A1 (de) * 1972-02-16 1973-08-30 Werner Merz Anlage zur entwicklung fotografischen materials
US4021832A (en) * 1974-08-05 1977-05-03 Kreonite, Inc. Photocell control device for a photographic film processor
GB1469004A (en) * 1974-11-25 1977-03-30 Logetronics Inc Method of stabilizing developer activity in an automatic film processor
US4314753A (en) * 1980-07-14 1982-02-09 Pako Corporation Automatic inverse fix replenisher control

Also Published As

Publication number Publication date
DE3381151D1 (de) 1990-03-01
IT1159764B (it) 1987-03-04
EP0101559A3 (en) 1986-08-20
EP0101559A2 (de) 1984-02-29
IT8245726A0 (it) 1982-07-20

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