US3242841A - Photographic processing apparatus - Google Patents

Photographic processing apparatus Download PDF

Info

Publication number
US3242841A
US3242841A US313024A US31302463A US3242841A US 3242841 A US3242841 A US 3242841A US 313024 A US313024 A US 313024A US 31302463 A US31302463 A US 31302463A US 3242841 A US3242841 A US 3242841A
Authority
US
United States
Prior art keywords
rollers
solution
sheet
roller
activator
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 - Lifetime
Application number
US313024A
Other languages
English (en)
Inventor
Goodall Charles Clifford Owen
Rice John
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.)
Ilford Imaging UK Ltd
Original Assignee
Ilford Ltd
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 Ilford Ltd filed Critical Ilford Ltd
Application granted granted Critical
Publication of US3242841A publication Critical patent/US3242841A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

  • This invention relates to photographic processing apparatus and in particular to apparatus for processing gelatino silver halide based material suitable for use in offices orthe like.
  • the material When exposed silver halide emulsion material is processed, it is usually immersed in a developing solution to develop the latent image and then in a fixing bath to remove the unexposed silver halide. If the developing agent is included in the emulsion, the material can then be processed by merely wetting the emulsion with an activator solution, which is usually an alkaline solution of high pH, and then passing the material into a stabilizer solution which does not remove the unexposed silver halide but converts it to a complex which is un affected by light.
  • an activator solution which is usually an alkaline solution of high pH
  • an apparatus for the application of activator solution to an exposed developer-containing gelatino silver halide photographic material which omprises three resilient rollers mounted in an inverted V form, the upper roller being driven and in contact with the lower two rollers, and the lower two rollers being partially immersed in an activator solution, the diameter of the rollers being between 18 and 30 mm. and the angle of the apex of the triangle formed by the axes of the rollers being between 60 and solution 6 before it is gripped by the rollers which are the solution bead 7.
  • three rubber or synthetic rubber surfaced rollers are provided each of substantially 25 mm. diameter, the angle at the apex of the triangle formed by the axes of the rollers is substantially and the base of the triangle substantially horizontal.
  • FIG. 1 is a diagrammatic representation of one form of the apparatus
  • FIG. 2 is a variant of the apparatus.
  • rollers 1, 2 and 3 are arranged so that the angle at the apex of the triangle formed by the axes of the rollers is 90 and the base of the triangle is parallel to the horizozntal.
  • the bottom half of each of the rollers 2 and 3 is immersed in an activator solution 5 contained in a trough 4.
  • Roller 1 is caused to revolve (clockwise as illustrated) by means not shown and this movement causes rollers 2 and 3 to revolve in solution 5.
  • a small amount of this solution is picked up by the rollers and is carried up as the rollers revolve to accumulate as a bead of solution 6 at the nip between roller 1 and roller 2 and as a smaller bead of solution 7 at the nip between roller 1 and roller 3.
  • a sheet of exposed photographic material 8 is fed emulsion face downwards into the nip of the rollers 1 and 2. As the sheet is advanced into the nip it is gripped between the said rollers and urged forward by their revolving motion. The sheet of material 8 has to pass through the bead of themselves wet with the activator solution. As the sheet of material is urged forward by the rollers it reaches the guide 9 and it is then deflected upwards so that it is guided into the nip between the rollers 1 and 3 through It is then gripped between rollers 1 and 3 and urged forward by their revolving motion. Due to the angle of the rollers it leaves the apparatus travelling in an upward direction.
  • the emulsion of the exposed material is thoroughly wetted by the activator solution as it has to pass through two beads of activator solution 6 and 7 which are formed at the two nips of the rollers and it is also wetted by coming in contact with the rollers as the rollers themselves are wet with activator solution.
  • FIG. 2 a large roller 10 which is driven (clockwise as shown), causes two smaller rollers 11 and 12 to revolve in solution 14. Owing to the distance separating the rollers 11 and 12 a longer material guide 13, than in FIG. 1, has to be provided. A sheet of material 15 enters the apparatus at the nip between rollers 10 and 11 and is urged through the apparatus being guided by 13 so that it enters the nip between rollers 10 and 12.
  • rollers as hereinbefore described, with special reference to the figures, make it particularly suitable for use in small processing apparatus, designed to process developer-containing gelatino silver halide emulsion material, due to the following factors:
  • a photographic processing apparatus for processing developer containing gelatino silver halide emulsion material the sheet of material is first fed into a roller mechanism for applying activator solution, as hereinbefore described, and the sheet of material is then guided into a bath containing stabilizer solution and out of the stabilizer solution into the nip of two driven rollers which squeegee the sheet of material substantially free of liquid. There always occurs a momentary pause until the sheet of material is properly gripped by the squeegee rollers and passed through these rollers. This pause followed by the material being pulled rapidly out of the solution by the squeegee rollers causes surges of liquid to occur in the stabilizer bath.
  • An apparatus for the application of activator solution to an exposed developer containing gelatino silver halide photographic material which comprises three resilient rollers mounted in an inverted V form, the upper roller being driven and in contact with the lower two rollers, and the lower two rollers being partially immersed in an activator solution, the diameter of the rollers being at least 18 mm. but not more than 30 mm. and the angle of the apex of the triangle formed by the axes of the rollers being between at least but not more than 100 and the angle made by the base of the triangle with the horizontal being not more than 20, there being at least a 5 mm. gap between the lower two rollers and means located between the lower rollers for guiding the material successively between the nips formed between each lower and upper roller.
  • rollers each have a rubber surface.
  • rollers each have a synthetic rubber surface.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
US313024A 1963-06-05 1963-10-01 Photographic processing apparatus Expired - Lifetime US3242841A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22372/63A GB983937A (en) 1963-06-05 1963-06-05 Photographic processing apparatus

Publications (1)

Publication Number Publication Date
US3242841A true US3242841A (en) 1966-03-29

Family

ID=10178309

Family Applications (1)

Application Number Title Priority Date Filing Date
US313024A Expired - Lifetime US3242841A (en) 1963-06-05 1963-10-01 Photographic processing apparatus

Country Status (3)

Country Link
US (1) US3242841A (en, 2012)
BE (1) BE639141A (en, 2012)
GB (1) GB983937A (en, 2012)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5752121A (en) * 1995-09-27 1998-05-12 Eastman Kodak Company Photographic processing apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2605684A (en) * 1947-10-06 1952-08-05 Grinten Chem L V D Apparatus for semiwet development of photoprints
US3000287A (en) * 1954-11-30 1961-09-19 Grinten Chem L V D Apparatus for developing and/or fixing photographic printing material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2605684A (en) * 1947-10-06 1952-08-05 Grinten Chem L V D Apparatus for semiwet development of photoprints
US3000287A (en) * 1954-11-30 1961-09-19 Grinten Chem L V D Apparatus for developing and/or fixing photographic printing material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5752121A (en) * 1995-09-27 1998-05-12 Eastman Kodak Company Photographic processing apparatus

Also Published As

Publication number Publication date
BE639141A (en, 2012)
GB983937A (en) 1965-02-24

Similar Documents

Publication Publication Date Title
US3363530A (en) Apparatus for processing film by means of a porous web solution applicator
US2913974A (en) Photographic material processing apparatus
US2848931A (en) Film developing apparatus
US2930302A (en) Processing of photographic film
US1907252A (en) Method for treating films arranged in strips
US3305459A (en) Electrolytic electrocopying method and apparatus
US3833918A (en) Photographic processing apparatus
US2913973A (en) Photographic material conveying apparatus
GB1245940A (en) Electrostatographic office copier
US3242841A (en) Photographic processing apparatus
US3465663A (en) Photographic processing apparatus
US3242843A (en) Photographic processing apparatus
US3379113A (en) Method and apparatus for processing light-sensitive elements
US2386856A (en) Method of and apparatus for processing photographic film
US3357337A (en) Photographic process and apparatus for producing photographic images
JPS61129644A (ja) 写真処理方法
GB1314865A (en) Liquid type electrophotography developing apparatus
US3348946A (en) Non-aqueous sil ver halide photographic emulsion processing
GB993446A (en) Process and apparatus for the development of latent electrostatic images
US3283647A (en) Projection offset system
US3710703A (en) Web transport apparatus
US3415176A (en) Photographic processing apparatus
US3334564A (en) Apparatus for carrying out a diffusion transfer process
US3043687A (en) Photographic colloid transfer process
JPH07175196A (ja) クリーニングローラーを有する写真処理機