US3504614A - Ammonia tanks for use in developing diazo sensitized material - Google Patents

Ammonia tanks for use in developing diazo sensitized material Download PDF

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Publication number
US3504614A
US3504614A US617614A US3504614DA US3504614A US 3504614 A US3504614 A US 3504614A US 617614 A US617614 A US 617614A US 3504614D A US3504614D A US 3504614DA US 3504614 A US3504614 A US 3504614A
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US
United States
Prior art keywords
tank
wires
developing
aperture
sensitized material
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
US617614A
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English (en)
Inventor
Stanley Lewis Lyons
William Bert Pead
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.)
R Q O HOLDING CO Inc
Original Assignee
GAF Corp
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Filing date
Publication date
Application filed by GAF Corp filed Critical GAF Corp
Application granted granted Critical
Publication of US3504614A publication Critical patent/US3504614A/en
Assigned to R Q O HOLDING COMPANY INC reassignment R Q O HOLDING COMPANY INC ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: GAF CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D7/00—Gas processing apparatus

Definitions

  • Certain reproduction processes use a developing media such as an ammonia gas and water vapor mixtures to develop exposed images on sensitized sheets or webs of film, plastics, paper or other gelatin coated materials.
  • a developing media such as an ammonia gas and water vapor mixtures
  • the ammonia gas and water vapor mixture is stored in a tank which has an opening for permitting the developing media to escape and contact the material carried over the tank opening.
  • the hereinabove mentioned materials due to their physical properties, method of transport through an exposure station, heat from the exposure station, etc. tend to curl and thereby enter the opening in the tank.
  • an apparatus for developing sensitized sheet material where the material is conveyed across the opening of an ammonia development tank by an imprevious conveyor band and the material is prevented from entering the tank by a plurality of tensioned filaments stretched across the opening.
  • the area of the filaments which may consist of metal or a plastic material such as nylon, occupy not more than 1% of the area of the opening.
  • an object of the invention is to provide a developing apparatus in which sensitized material can be contacted by the developing medium uniformly and over the entire area thereof.
  • Another object of the invention is to provide a developing tank construction which has an increased gas contact area without a corresponding increase in the size of thetank opening.
  • FIG. 2 is a diagram showing a detail of the arrangement of the wires shown in FIG. 1.
  • the tank 1 having a plurality of thin wires 2 of stainless steel. These are positioned across the downwardly facing aperture 3 of the tank 1 such that the ratio of the areas of the wires to the area of the aperture is 0.5%.
  • the wires 2 are arranged parallel to the line in which the material is being conveyed. A divergence of the wires from the parallel is permissible provided it is less than 45, for example 10 to 15.
  • Means for mounting the wires consists in providing two L-shaped brackets 4 which are secured to the outside of the front and rear faces 5 and 6, respectively, of the tank 1 as shown in FIG. 1.
  • brackets have slots 7 in which the wires are adapted to be positioned as most clearly illustrated in FIG. 2.
  • One of the difficulties experienced in the use of wires is that temperature changes cause dimensional variation of the wires so that the tension of the wires may vary considerably and this may lead to the wires breaking or stretching so as to become too loose to act as effective guides for the paper.
  • the wires 2 are connected to springs 8 which are secured to an anchor bracket 9.
  • the ends of the wires 2 are fastened directly to a bracket 11.
  • FIG. 2 two alternative forms of tensioning means are shown for tensioning the wires.
  • two of the wires 2 are joined together to form a loop and the spring 8 is attached to the loop.
  • the second alternative tensioning means shown at the bottom of FIG. 2 is to provide a second coil spring 10 positioned at the other end of a closed loop of wire 2 and secured to the anchor bracket 11.
  • the tank 1 is positioned above a shallow loop in a conveyor belt 13 which is carried on rollers 14 and 15 and lightly tensioned by means (not shown) to seal against the aperture 3 in the tank 1 while permitting material to be carried on the belt over said aperture 3 for development.
  • a slip screen 16 of anti-friction plastics material for example polytetrafluoroethylene is provided.
  • Another slip screen 18 is shown positioned at the trailing edge of the aperture 3 in tank 1 though this may not be required.
  • a substantial proportion of the slip screen 16 is arranged nearly vertically and is external to the tank 1 so as to act as a guide for the incoming material sheet to be developed as well as an antifriction device for reducing the friction between the material and/or the belt against the leading edge marginal surface 12 of the aperture 3.
  • a sheet of sensitized material is indicated diagrammatically at 20.
  • the leading edge 22 of the slip screen 16 is anchored to a convenient member 24 located at a convenient distance external to the tank 1 and said member being mounted on any convenient part of the machine not shown.
  • the trailing edge 28 of the slip screen 16 is permitted to lie free and be approximately coincident with the inner edge 30 of the marginal surface 12 at the aperture 3 of the tank 1.
  • the stainless steel wires 2 lie between the slip screen 16 and the tank 1.
  • the slip screen 18 at the trailing edge of the aperture 3 in the tank 1 has its leading edge 32 anchored Within the tank 1 to a bent up flange 34 at the mouth of the aperture 3 and its trailing edge 36 is free.
  • a developing tank constructed in the manner heretofore described has proven to provide excellent transport of the sensitized material and good quality and evenness of development. Owing to the free access of the tank atmosphere to the paper, which is provided by this invention, a much shorter tank opening may be utilized for a given speed of transport and quality of development.
  • An apparatus for developing a sensitized material by conveying said material by a conveyor belt across an aperture of a developing tank containing a gaseous developing media comprising a plurality of tensioned filaments stretched across said aperture whereby said material is prevented from entering said tank and is exposed to said developing media, and a slip screen located at the leading edge of such aperture, with said tensioned filaments lying between said slip screen and said tank, said filaments being stretched in an inclined plane with the tank located above the conveyor belt which also is inclined and located below the aperture of such tank with the leading edge thereof above the trailing edge, so that the unsensitized material is conveyed by the belt downwardly under said filaments.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
US617614A 1957-06-12 1967-02-21 Ammonia tanks for use in developing diazo sensitized material Expired - Lifetime US3504614A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEH0062726 1957-06-12
US61761467A 1967-02-21 1967-02-21
BE698660 1967-05-18
NL6707064A NL6707064A (forum.php) 1957-06-12 1967-05-22

Publications (1)

Publication Number Publication Date
US3504614A true US3504614A (en) 1970-04-07

Family

ID=27424877

Family Applications (1)

Application Number Title Priority Date Filing Date
US617614A Expired - Lifetime US3504614A (en) 1957-06-12 1967-02-21 Ammonia tanks for use in developing diazo sensitized material

Country Status (5)

Country Link
US (1) US3504614A (forum.php)
BE (1) BE698660A (forum.php)
DE (1) DE1572286A1 (forum.php)
GB (1) GB1110130A (forum.php)
NL (1) NL6707064A (forum.php)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930318A (en) * 1973-04-23 1976-01-06 Continental Can Company, Inc. Ultraviolet curing machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1861329A (en) * 1927-05-02 1932-05-31 Kalle & Co Ag Apparatus for developing light-sensitive material
US1900878A (en) * 1927-12-03 1933-03-07 Eastman Kodak Co Document photographing apparatus
US2839978A (en) * 1954-05-18 1958-06-24 Tecnifax Corp Slip screen structure for dry-type developing machines
US2986149A (en) * 1958-04-21 1961-05-30 Jack Flapan Floor mat cleaning machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1861329A (en) * 1927-05-02 1932-05-31 Kalle & Co Ag Apparatus for developing light-sensitive material
US1900878A (en) * 1927-12-03 1933-03-07 Eastman Kodak Co Document photographing apparatus
US2839978A (en) * 1954-05-18 1958-06-24 Tecnifax Corp Slip screen structure for dry-type developing machines
US2986149A (en) * 1958-04-21 1961-05-30 Jack Flapan Floor mat cleaning machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930318A (en) * 1973-04-23 1976-01-06 Continental Can Company, Inc. Ultraviolet curing machine

Also Published As

Publication number Publication date
DE1572286A1 (de) 1970-01-08
NL6707064A (forum.php) 1968-11-25
GB1110130A (en) 1968-04-18
BE698660A (forum.php) 1967-11-03

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Legal Events

Date Code Title Description
AS Assignment

Owner name: R Q O HOLDING COMPANY INC, NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GAF CORPORATION;REEL/FRAME:004006/0585

Effective date: 19820526

Owner name: R Q O HOLDING COMPANY INC 111 WEST 2ND ST JAMESTOW

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:GAF CORPORATION;REEL/FRAME:004006/0585

Effective date: 19820526