GB443581A - Apparatus and process for the rapid development of intermediate films for televisionpurposes - Google Patents

Apparatus and process for the rapid development of intermediate films for televisionpurposes

Info

Publication number
GB443581A
GB443581A GB24999/34A GB2499934A GB443581A GB 443581 A GB443581 A GB 443581A GB 24999/34 A GB24999/34 A GB 24999/34A GB 2499934 A GB2499934 A GB 2499934A GB 443581 A GB443581 A GB 443581A
Authority
GB
United Kingdom
Prior art keywords
film
roller
development
length
liquid
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
GB24999/34A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Publication of GB443581A publication Critical patent/GB443581A/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
    • G03D3/08—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
    • G03D3/137—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 provided with transport speed regulation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)

Abstract

443,581. Photographic developing machines and processes. I. G. FARBENINDUSTRIE AKT.-GES., Frankfort-on- Main, Germany. Aug. 30, 1934, No. 24999. Convention date, Sept. 26, 1933. [Class 98 (ii)] The photographic film is passed under a yieldable roller before it enters the first developing tank, so as to form a compensating loop whereby the length of the film in the first developing tank may be varied without any change in the length of the film in the other liquid tanks. The tanks 2 are compartments of a large tank and the film is passed therethrough over idle rollers 17 and toothed drums 7 mounted on a cover plate 5. Before the film enters the tank 2 it is passed under a tensioning roller 13, over a toothed drum 7<1>, under a compensating roller 13a, and over a fixed idle roller 17. The roller 13a is connected to the roller 16 in the developing tank by a band 22 passing over a driving pulley and hand crank 19 so that the length of film in the developing tank can be varied. If the film also comprises a sound track, a heated reservoir 23 containing developer applies the liquid to the sound track by means of a brush or sponge 24 giving a constant development to the sound track. The liquid in the tanks is heated by baths 3, the film being dried in a chamber 18 heated by a current of hot air from a fan coupled to a motor 9. In order to determine the required length of immersion of the loop in the developing liquid for any particular film, the light intensity ratio for the darkest and lightest parts of the scene photographed is determined photometrically during the taking operation, and from previouslydetermined curves showing the relation between development, light intensities, and the blackening of the film, the time of development is obtained. The loop 21 of film is then adjusted by the hand crank 19 to a length corresponding to the required time. In establishing the relation between development and the light intensity ratios, several strips of film are exposed under a grey wedge and developed until the minimum blackening is due to fog. Curves are drawn for a variety of development times.
GB24999/34A 1933-09-26 1934-08-30 Apparatus and process for the rapid development of intermediate films for televisionpurposes Expired GB443581A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE443581X 1933-09-26

Publications (1)

Publication Number Publication Date
GB443581A true GB443581A (en) 1936-03-02

Family

ID=6530154

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24999/34A Expired GB443581A (en) 1933-09-26 1934-08-30 Apparatus and process for the rapid development of intermediate films for televisionpurposes

Country Status (1)

Country Link
GB (1) GB443581A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2651245A (en) * 1949-10-06 1953-09-08 Warner Bros Means for rapidly processing photographic film
US3087405A (en) * 1959-12-21 1963-04-30 Sperry Rand Corp Film processing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2651245A (en) * 1949-10-06 1953-09-08 Warner Bros Means for rapidly processing photographic film
US3087405A (en) * 1959-12-21 1963-04-30 Sperry Rand Corp Film processing apparatus

Similar Documents

Publication Publication Date Title
US3511160A (en) Photographic processing device
US3620725A (en) Rapid photographic development system
GB443581A (en) Apparatus and process for the rapid development of intermediate films for televisionpurposes
US4977422A (en) Apparatus for transporting flat sheets, especially photosensitive sheet materials
US1939231A (en) Photographic reversal process
US2386856A (en) Method of and apparatus for processing photographic film
US2766719A (en) Apparatus for coating printing cylinders
US1857089A (en) Ing cobpobation
US1690616A (en) Film-treating apparatus
US1552791A (en) of bochester
US1917360A (en) Film printing
US2073212A (en) Process for the production of photolike multitoned prints
US2553841A (en) Cinematographic apparatus
SU121029A1 (en) Method of making contact rasters
GB446172A (en) Improvements in or relating to photographic reversal processes
Crabtree et al. The duplication of motion picture negatives
US1303836A (en) Alvin wyckoff anb max handschiegl
US2287763A (en) Machine for developing blueprints
JPS6022351Y2 (en) Reversal exposure device
US1896525A (en) Film processing machine and method
US1433806A (en) Preparation of plates for printing by greasy ink
GB384334A (en) Method of producing a colored motion picture film
Ives et al. Making a Fade-Out by after Treatment
GB299793A (en) Improvements in or relating to apparatus for developing and/or fixing photographs
GB264506A (en) Improvements in the manufacture of cinematographic filmstrips