GB1105476A - Improvements in or relating to photographic developing tanks and to methods for use in the development of photographic films - Google Patents

Improvements in or relating to photographic developing tanks and to methods for use in the development of photographic films

Info

Publication number
GB1105476A
GB1105476A GB4037864A GB4037864A GB1105476A GB 1105476 A GB1105476 A GB 1105476A GB 4037864 A GB4037864 A GB 4037864A GB 4037864 A GB4037864 A GB 4037864A GB 1105476 A GB1105476 A GB 1105476A
Authority
GB
United Kingdom
Prior art keywords
tank
auxiliary
film
strip
photographic
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
GB4037864A
Inventor
David Malcolm Owen
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.)
Papers & Publications Printers
Original Assignee
Papers & Publications Printers
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 Papers & Publications Printers filed Critical Papers & Publications Printers
Priority to GB4037864A priority Critical patent/GB1105476A/en
Publication of GB1105476A publication Critical patent/GB1105476A/en
Expired legal-status Critical Current

Links

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

Abstract

1,105,476. Photographic development method and apparatus; automatic concentration control. PAPERS & PUBLICATIONS (PRINTERS) Ltd. Sept. 28, 1965 [Oct. 3, 1964], No.40378/64. Headings G2A and G3R. A strip 31 of exposed film is developed by passing it through a tank 12 of developer solution. An auxiliary tank 10, communicating with tank 12 through a pipe 11, has passing through it an auxiliary strip 14 of pre-fogged or exposed film, which may then pass through a tank 16 of fixing solution. The density of the developed film is an indication of the degree of exhaustion of the developer. Light from a source 21 passes through film strip 14 and then falls on a photo-electric cell 23. When the light reaching the cell increases to a predetermined level, a relay 24 is operated which controls a valve 26, allowing a replenishing supply of developer from a reservoir 27 to run into tank 12. The auxiliary tank may be omitted, and the auxiliary film strip passed through the main developing tank.
GB4037864A 1964-10-03 1964-10-03 Improvements in or relating to photographic developing tanks and to methods for use in the development of photographic films Expired GB1105476A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4037864A GB1105476A (en) 1964-10-03 1964-10-03 Improvements in or relating to photographic developing tanks and to methods for use in the development of photographic films

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4037864A GB1105476A (en) 1964-10-03 1964-10-03 Improvements in or relating to photographic developing tanks and to methods for use in the development of photographic films

Publications (1)

Publication Number Publication Date
GB1105476A true GB1105476A (en) 1968-03-06

Family

ID=10414593

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4037864A Expired GB1105476A (en) 1964-10-03 1964-10-03 Improvements in or relating to photographic developing tanks and to methods for use in the development of photographic films

Country Status (1)

Country Link
GB (1) GB1105476A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3554109A (en) * 1969-09-17 1971-01-12 Logetronics Inc Image monitoring and control system
US3559555A (en) * 1968-06-04 1971-02-02 John N Street Image monitoring and control system
US3696728A (en) * 1969-12-19 1972-10-10 Stephen F Hope Film processor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3559555A (en) * 1968-06-04 1971-02-02 John N Street Image monitoring and control system
US3554109A (en) * 1969-09-17 1971-01-12 Logetronics Inc Image monitoring and control system
US3696728A (en) * 1969-12-19 1972-10-10 Stephen F Hope Film processor

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