GB491231A - Improvements in or relating to developing tanks for photographic roll-films - Google Patents

Improvements in or relating to developing tanks for photographic roll-films

Info

Publication number
GB491231A
GB491231A GB560537A GB560537A GB491231A GB 491231 A GB491231 A GB 491231A GB 560537 A GB560537 A GB 560537A GB 560537 A GB560537 A GB 560537A GB 491231 A GB491231 A GB 491231A
Authority
GB
United Kingdom
Prior art keywords
film
spool
fitted
tank
backing paper
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
GB560537A
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
Priority to GB560537A priority Critical patent/GB491231A/en
Publication of GB491231A publication Critical patent/GB491231A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03DAPPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D13/00Processing apparatus or accessories therefor, not covered by groups G11B3/00 - G11B11/00
    • G03D13/02Containers; Holding-devices
    • G03D13/04Trays; Dishes; Tanks ; Drums
    • G03D13/06Light-tight tanks with provision for loading in daylight

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photographic Developing Apparatuses (AREA)

Abstract

491,231. Photographic developing- apparatus. ERSKINE, A..J. Feb. 25, 1937, No.5605. [Class 98 (ii)] A developing tank for roll films is provided with means for guiding and supporting the film in the space to be occupied by the developing solution, means for engaging the free end of the film and means operable from outside the tank for moving said engaging means around said guiding and supporting means so as to draw the film therearound and means may also be provided for separating the backing paper from behind the film. In the form shown Fig. 1 represents a tank a made of plastic material such as resin fitted with inlet c and light-tight cap d. The compartment g comprises a spool k of exposed film and a rotatable empty spool m and is fitted with a lid h. The spool compartment is fitted with a slot s and spring t for guiding the film. A plate u, Fig. 3, moulded with a spiral groove v on one side is adapted to rest in the tank a against one side thereof and a disc having a central boss y is rotatably mounted on a loose shaft z. The disc x is formed with a radially extending slot 11, Fig. 5, which constitutes a guideway for a slide-block 12 fitted with a peg 13 for moving in the groove v and with a slotted bar 14. Supporting rods 15 project from the opposite wall and are arranged in a spiral. These rods are preferably removable. A friction wheel 16 fitted with operating knob 18 engages the edge of the disc x. Backing paper is wound on the spool m, and the film passes through slot s and is engaged with the bar 14 and the lid d is placed in position. The knobs of both spool m and wheel 16 are now rotated so that the film is wound round the rods 15 and the backing paper round the spool m. Developing solution may then be introduced through inlet c. Stop pins may be placed at suitable positions at the end of the spiral v so as to arrest the movement of the bar 14 when the spool is unwound. The - spool m may be rotated by means of a spring or geared with the spool k so that the: rotation of a single handle 1.8 may effect the drawing of the film and removal of the backing paper simultaneously. The slit s may be furnished with rubber edges pressing together to form a water- @ight seal. The tank may be provided with means for rocking it and also with an outlet tap. In another form the bars 14 may engage with a spiral guide at both ends and draw the film around so as to engage its ends in a spiral groove. The backing paper may be led through a guide slit into a chamber where it will form a coil of its own volition. Reference has been directed by the Comptroller to Specificatlions 166,897 and 205,968, [both in class 98 (ii)].
GB560537A 1937-02-25 1937-02-25 Improvements in or relating to developing tanks for photographic roll-films Expired GB491231A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB560537A GB491231A (en) 1937-02-25 1937-02-25 Improvements in or relating to developing tanks for photographic roll-films

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB560537A GB491231A (en) 1937-02-25 1937-02-25 Improvements in or relating to developing tanks for photographic roll-films

Publications (1)

Publication Number Publication Date
GB491231A true GB491231A (en) 1938-08-25

Family

ID=9799223

Family Applications (1)

Application Number Title Priority Date Filing Date
GB560537A Expired GB491231A (en) 1937-02-25 1937-02-25 Improvements in or relating to developing tanks for photographic roll-films

Country Status (1)

Country Link
GB (1) GB491231A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484378A (en) * 1945-01-19 1949-10-11 Freeman Samuel Developing tank for developing photographic films
US2522763A (en) * 1947-09-11 1950-09-19 Jr Jonathan S Powell Apparatus for developing film
CN114049841A (en) * 2021-11-15 2022-02-15 合肥维信诺科技有限公司 Curling and unfolding mechanism and flexible display device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484378A (en) * 1945-01-19 1949-10-11 Freeman Samuel Developing tank for developing photographic films
US2522763A (en) * 1947-09-11 1950-09-19 Jr Jonathan S Powell Apparatus for developing film
CN114049841A (en) * 2021-11-15 2022-02-15 合肥维信诺科技有限公司 Curling and unfolding mechanism and flexible display device
CN114049841B (en) * 2021-11-15 2023-12-22 合肥维信诺科技有限公司 Crimping and unfolding mechanism and flexible display device

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