EP0006799B1 - Verfahren und Vorrichtung zur Erhöhung der Entwicklungsgeschwindigkeit in Diazokopiegeräten - Google Patents
Verfahren und Vorrichtung zur Erhöhung der Entwicklungsgeschwindigkeit in Diazokopiegeräten Download PDFInfo
- Publication number
- EP0006799B1 EP0006799B1 EP79400397A EP79400397A EP0006799B1 EP 0006799 B1 EP0006799 B1 EP 0006799B1 EP 79400397 A EP79400397 A EP 79400397A EP 79400397 A EP79400397 A EP 79400397A EP 0006799 B1 EP0006799 B1 EP 0006799B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vapours
- walls
- ammoniacal
- developing
- convergent
- 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
Links
- 238000000034 method Methods 0.000 title claims description 18
- 230000000694 effects Effects 0.000 claims description 4
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 26
- 229910021529 ammonia Inorganic materials 0.000 abstract description 13
- 239000000463 material Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- G03D7/00—Gas processing apparatus
Definitions
- the present invention relates to an improvement to the process for developing diazocopies using ammonia vapors. It relates more particularly to a process for developing a copy medium coated with a sensitive diazo layer previously exposed through an original in an ultraviolet exposure station, consisting in bringing said copy medium into contact with ammonia vapors, at temperature greater than or equal to 55 ° C.
- the method according to the invention makes it possible to avoid these drawbacks.
- the method according to the invention is characterized in that the ammoniacal vapors are channeled and accelerated vertically by aerodynamic effect in a convergent pipe, without supply of external energy to accelerate their ascent, said vapors then being directed towards the support of copy arranged in such a way that the flow of ammonia vapors has a trajectory between the horizontal and the vertical and strikes the copy medium, aside its sensitive layer, with a speed sufficient to cause rapid development of said copy medium.
- the invention uses the "chimney effect" which produces a natural acceleration of the vapors which are concentrated in a convergent pipe: the vapors being hot, they undergo a natural acceleration allowing them to strike the copy medium and to penetrate into it ci, thus accelerating the speed of development of the sensitive layer.
- an angle of incidence of said vapors on said medium will be chosen less than 45 ° and preferably at 30 °, in order also to obtain turbulence in the ammoniacal vapors close to the copy.
- the invention also relates to a device for implementing such a method, said device comprising a developing chamber in which ammoniacal vapors are generated by means known per se, and a rotary cylinder bringing the sensitive layer of the copy in contact with said ammonia vapors, the device being characterized in that said development chamber comprises a convergent system for accelerating the ammonia vapors and concentrating them on the sensitive layer of the copy, said convergent system comprising no means of energy supply outside.
- convergent system is meant a set of planes assembled together and having an upper opening and a lower opening, at least one dimension being identical for each of said planes and of which a section in a vertical plane perpendicular to the copy medium has an opening upper, of dimension smaller than that of the lower opening.
- a convergent system consisting of two converging walls substantially parallel to the rotary cylinder, extending over the entire width of the developing chamber, the lower ends of each of said walls being arranged on either side of the cup. so as to channel the vapors released, while the upper ends of said walls are located near the rotary cylinder, the distance separating the bases from the walls being greater than the distance separating the top of said walls.
- the walls which may consist of successive planes inclined with respect to each other, have no acute angle capable of reflecting part of said vapor.
- the cylinder 6 has a toothed tip at each of its ends. Each of them is carried by three rollers 22, 23 and 24.
- the cylinder 6 is driven by the pinion 32 directly connected to the axis of a motor, not shown in the figure.
- the thermostat 38 connected in series with the resistor 4 is placed near the internal wall of the cylinder 6.
- the thermostat 37 is connected in series with the heating resistors 2 and 3 placed respectively near the outlet of the developing chamber 1 and near the horizontal cup 9 and the introduction guide 16. As shown in the figure, the thermostat 37 is placed near the resistor 3 and the horizontal cup 9. In order to favor regulation of the temperature of the chamber development 1, it is surrounded by a material 20 with high thermal insulation power.
- This material can be glass wool, polyurethane foam, expanded polystyrene, etc. Its thickness will be a few centimeters, varying depending on the material used.
- the ascending system consists of a set of "rear” walls 51, 52 and 53 arranged parallel to the axis of rotation of the cylinder 6, and a set of “front” walls 54, 55, 56 and 57 arranged also parallel to cylinder 6.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT79400397T ATE368T1 (de) | 1978-06-23 | 1979-06-18 | Verfahren und vorrichtung zur erhoehung der entwicklungsgeschwindigkeit in diazokopiegeraeten. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7818787A FR2429453A1 (fr) | 1978-06-23 | 1978-06-23 | Procede pour ameliorer la vitesse de developpement dans les machines de diazocopie et dispositif de mise en oeuvre dudit procede |
FR7818787 | 1978-06-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0006799A1 EP0006799A1 (de) | 1980-01-09 |
EP0006799B1 true EP0006799B1 (de) | 1981-11-04 |
Family
ID=9209889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP79400397A Expired EP0006799B1 (de) | 1978-06-23 | 1979-06-18 | Verfahren und Vorrichtung zur Erhöhung der Entwicklungsgeschwindigkeit in Diazokopiegeräten |
Country Status (7)
Country | Link |
---|---|
US (1) | US4289394A (de) |
EP (1) | EP0006799B1 (de) |
AT (1) | ATE368T1 (de) |
BR (1) | BR7903908A (de) |
DE (1) | DE2961228D1 (de) |
FR (1) | FR2429453A1 (de) |
MX (1) | MX148057A (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6252653B1 (en) | 1999-10-12 | 2001-06-26 | Burgess Industries Inc. | Rotary thermal desensitizer of developer for photosensitive copy sheet material |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB762632A (en) * | 1954-07-28 | 1956-11-28 | Mason & Sons Ltd E N | Improvements in or relating to apparatus for photographic development by means of agas |
FR1315673A (fr) * | 1962-02-23 | 1963-01-18 | Appareil pour le développement en continu au gaz ammoniac de papiers photosensibles | |
NL6501481A (de) * | 1964-02-15 | 1965-08-16 | ||
US3534673A (en) * | 1967-08-29 | 1970-10-20 | Gaf Corp | Photocopy developing apparatus |
GB1256540A (de) * | 1967-12-28 | 1971-12-08 | ||
NL7400786A (de) * | 1973-02-19 | 1974-08-21 | ||
FR2358686A1 (fr) * | 1976-07-13 | 1978-02-10 | Cellophane Sa | Procede de developpement a sec d'un materiau de diazotypie et dispositif de mise en oeuvre |
-
1978
- 1978-06-23 FR FR7818787A patent/FR2429453A1/fr active Granted
-
1979
- 1979-06-18 AT AT79400397T patent/ATE368T1/de not_active IP Right Cessation
- 1979-06-18 DE DE7979400397T patent/DE2961228D1/de not_active Expired
- 1979-06-18 EP EP79400397A patent/EP0006799B1/de not_active Expired
- 1979-06-21 BR BR7903908A patent/BR7903908A/pt unknown
- 1979-06-22 MX MX178197A patent/MX148057A/es unknown
- 1979-06-22 US US06/050,995 patent/US4289394A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR2429453A1 (fr) | 1980-01-18 |
FR2429453B1 (de) | 1981-11-13 |
US4289394A (en) | 1981-09-15 |
BR7903908A (pt) | 1980-02-20 |
ATE368T1 (de) | 1981-11-15 |
MX148057A (es) | 1983-03-09 |
EP0006799A1 (de) | 1980-01-09 |
DE2961228D1 (en) | 1982-01-14 |
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