GB1211424A - Process for developing photoprinting material - Google Patents

Process for developing photoprinting material

Info

Publication number
GB1211424A
GB1211424A GB24960/68A GB2496068A GB1211424A GB 1211424 A GB1211424 A GB 1211424A GB 24960/68 A GB24960/68 A GB 24960/68A GB 2496068 A GB2496068 A GB 2496068A GB 1211424 A GB1211424 A GB 1211424A
Authority
GB
United Kingdom
Prior art keywords
pressure
gas
sector
cylinder
development
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
GB24960/68A
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.)
Kalle GmbH and Co KG
Original Assignee
Kalle GmbH and Co KG
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 Kalle GmbH and Co KG filed Critical Kalle GmbH and Co KG
Publication of GB1211424A publication Critical patent/GB1211424A/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
    • G03D7/00—Gas processing apparatus

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Rotary Pumps (AREA)

Abstract

1,211,424. Photographic developing apparatus. KALLE A.G. May 24, 1968 [May 26, 1967], No. 24960/68. Heading G2A. A continuous process for the development of photo-printing material by a gaseous developer, e.g. development of diazotype copies by humid gaseous ammonia, has the material conducted through a closed developing chamber which is subdivided into zones of different gas pressure, the material being subjected to a pressure which first increases to a value above atmospheric pressure and then decreases to a value below atmospheric pressure. Photo-printing material 8 is guided round a perforated cylinder 7, being pressed on to the cylinder by a gas-impermeable belt 9, which is guided by rollers 10. A rotary slide body 1 provided with slides 2 rotates in the same direction as, but at a faster rate than, the cyclinder and subdivided the latter into sectors 3, 4, 5, 6 all at different pressures. Developer gas is admitted to sector 3 through a valve 13 and a pipe 14 from a storage tank 16, and gas is drawn from sector 5 through a valve 13 and pipe 15 back to the tank. Sectors 3 and 6 are at pressure below atmospheric, whilst sector 5 is above atmospheric pressure. The cylinder is formed from a rigid metal structure provided with numerous bores and lined on its inner and outer surfaces with a thin layer of perforated stainless steel. The edges of the cylinder are unperforated but covered by the gasimpermeable belt to provide a gas seal. A further endless belt may cover the belt 9 in the area corresponding to high pressure sector 9. In another embodiment, Fig.8, (not shown), a triangularly shaped rotor (34) rotates eccentrically within a chamber (36) of suitable shape,the chamber being thick walled and having 7 inset rollers (39) for guiding the photo-printing material around its outer surface, borings (37) in the chamber wall connecting the pressure sectors to the material. Heating elements may be provided to accelerate development, and exhaust devices provided to remove small amounts of ammonia which may escape from the development zones.
GB24960/68A 1967-05-26 1968-05-24 Process for developing photoprinting material Expired GB1211424A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK0062377 1967-05-26

Publications (1)

Publication Number Publication Date
GB1211424A true GB1211424A (en) 1970-11-04

Family

ID=7230575

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24960/68A Expired GB1211424A (en) 1967-05-26 1968-05-24 Process for developing photoprinting material

Country Status (8)

Country Link
US (1) US3538837A (en)
AT (1) AT294575B (en)
BE (1) BE715752A (en)
DE (1) DE1572289C3 (en)
FR (1) FR1565275A (en)
GB (1) GB1211424A (en)
NL (1) NL6806918A (en)
SE (1) SE329333B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2472769A1 (en) * 1979-11-09 1981-07-03 Gaf Great Britain Ltd APPARATUS FOR DEVELOPING EXPOSED COPIES

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3984856A (en) * 1972-07-29 1976-10-05 Hoechst Aktiengesellschaft Process and apparatus for developing diazotype material
US3900862A (en) * 1974-04-25 1975-08-19 Gaf Corp Developing apparatus for photocopy machines
DE3200876C2 (en) * 1982-01-14 1987-02-12 Meteor-Siegen Apparatebau Paul Schmeck Gmbh, 5900 Siegen Device for continuous development of tracing material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2472769A1 (en) * 1979-11-09 1981-07-03 Gaf Great Britain Ltd APPARATUS FOR DEVELOPING EXPOSED COPIES

Also Published As

Publication number Publication date
NL6806918A (en) 1968-11-27
DE1572289B2 (en) 1974-10-10
US3538837A (en) 1970-11-10
FR1565275A (en) 1969-04-25
AT294575B (en) 1971-10-15
DE1572289A1 (en) 1970-01-15
SE329333B (en) 1970-10-05
DE1572289C3 (en) 1975-05-28
BE715752A (en) 1968-11-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PLNP Patent lapsed through nonpayment of renewal fees