US2898835A - Apparatus for the continuous development of light sensitive papers - Google Patents

Apparatus for the continuous development of light sensitive papers Download PDF

Info

Publication number
US2898835A
US2898835A US614595A US61459556A US2898835A US 2898835 A US2898835 A US 2898835A US 614595 A US614595 A US 614595A US 61459556 A US61459556 A US 61459556A US 2898835 A US2898835 A US 2898835A
Authority
US
United States
Prior art keywords
chamber
vapour
developing
ammonia
developing chamber
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
US614595A
Inventor
Jacobs Ridley Saul
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.)
NIG MANUFACTURING Co Ltd
Original Assignee
NIG Manufacturing Co 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 NIG Manufacturing Co Ltd filed Critical NIG Manufacturing Co Ltd
Priority to US614595A priority Critical patent/US2898835A/en
Application granted granted Critical
Publication of US2898835A publication Critical patent/US2898835A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03DAPPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D7/00Gas processing apparatus

Definitions

  • This invention relates to apparatus for the continuous development of light sensitive materials, such as diazo type papers, by means of vapour such as ammonia vapour.
  • an ammonia tank from which heated vapour is delivered to a developing chamber, through which the material to be developed is guided by an endless belt, such as a rubber blanket, one wall of said chamber forming a bafiie for vapour delivered to said chamber through an inlet from a delivery duct between the tank and developing chamber, the battle and belt converging together in the direction of feed of paper, the bafile also having a series of orifices therein through which vapour from the developing chamber flows back into the ammonia tank, whereby the flow of vapour occurs in a closed circuit.
  • the duct may terminate in a box-like chamber, communication between which and the developing chamber is formed by a continuous transverse slot in a common wall between said box-like and developing chambers, which wall forms the baffle which directs the vapour at an acute angle to the direction of feed of paper.
  • the slot in the baffle may be interrupted to form a number of apertures to establish desired communication between the box-like and developing chambers.
  • Figure 1 is a diagrammatic general view of the apparatus
  • Figure 2 a perspective cut-away view of the ammonia tank.
  • the apparatus comprises a generally L-shaped ammonia tank, shown at 1 ( Figure 2), which is divided by walls 2 into an ammonia vapour storage chamber 3 and a duct in the form of an ammonia vapour delivery box-like chamber 4.
  • a pump housing 5 Built on to the vapour storage chamber 3 is a pump housing 5 in which is housed a centrifugal pump shown generally at 6. The fan sucks vapour from the chamber 3 through the fan eye to feed it under pressure through an opening 7 in the rear wall of the chamber 4.
  • the opposite Wall of the said delivery chamber 4 is formed with a continuous slot 8, which forms the delivery outlet for the ammonia vapour to a developing chamber 9 formed by one wall of the said chamber and by a rubber blanket 11 which is driven in a closed path over rollers 12, and over which blanket the paper to be developed is fed, the blanket and its rollers being housed within a casing 10.
  • the common wall 14 of the box-like chamber 4 and developing chamber 9 converges from the outlet 8 adjacent which the paper is fed to the chamber 9 in the direction of feed of paper, the said outlet 8 being so arranged that the vapour is fed at an acute angle to the said direction of paper feed.
  • the vapour storage chamber 3 is formed with series of It will be ice in addition to the wall which forms the bafiie 14, and the casing 10, by overhanging parts 15 of the wall of the chamber 4.
  • Paper which has been developed, as it leaves the blanket 11, is picked up by a travelling belt 17 to deliver it in known manner to an outlet 18 or 19 as desired.
  • the ammonia vapour may be heated either in the chamber 3, at the suction side of the pump 6 or in the box-like chamber 4.
  • a rapid stream of heated ammonia vapour can be directed at any desired velocity evenly across the surface of the paper to be developed, to assure a constantly uniform mixture, whilst the vapourising and/or heating can be carried out at almost any point in the closed circuit of vapour, for example either inside or outside the tank 1.
  • very rapid speeds of development are obtained and diazo type prints from all kinds of materials, such as thin papers or tracing cloths, can be developed without sticking or frequent distortion, and the dangers of condensation can be readily controlled.
  • Apparatus for the continuous development of light sensitive materials such as diazo type papers, including an ammonia vapour storage chamber, a developing chamber, delivery duct means between said ammonia vapour storage chamber and said chamber, through which duct means heated vapour from said ammonia vapour storage chamber can pass to said developing chamber, a movable endless belt forming one wall of said developing chamber, said belt constituting a moving guide for the material to be developed, a bafile constituted by another wall of said developing chamber, which battle guides the vapour delivered to said developing chamber through the duct means from said ammonia vapour storage chamber, said bafiie and said endless belt converging in the direction of feed of the material and said duct means opening into said developing chamber remote from the end thereof toward which said baffle and said endless belt converge, and a series of orifices in said bafiie through which vapour from the developing chamber can flow back into the ammonia vapour storage chamber, so that the flow of vapour occurs in a closed circuit.
  • the duct means includes a box-like chamber, communication between which and the developing chamber is formed by a continuous transverse slot in the bathe which forms a common wall between said box-like and developing chambers which baflle directs the vapour at an acute angle to the direction of feed of paper.
  • Apparatus for the continuous development of light sensitive materials such as diazo type papers, including an ammonia vapor storage chamber, a developing chamber, delivery duct means: between said ammonia vapour storage chamber and said developing chamber, through which duct means heated vapour from said ammonia vapour storage chamber can pass to said developing chamber, a movable endless belt forming one wall of said developing chamber, said belt constituting a moving guide for the material to be developed, a bafile constituted by another wall of said developing chamber, which bafile guides the vapour delivered to said developing chamber through the duct means from.
  • said ammonia vapour storage chamber said baflle and said endless belt converging in the direction-of feed of the material and said duct means opening into said developing chamber remote from the end thereof toward which said bafiie and said endless belt converge, and means for returning vapour from said developing chamber to said ammonia vapour storage chamber.
  • Apparatus for the continuous development of light sensitive materialsuch as diazo type papers comprising atank, wall means forming within said tank a vapour storage chamber and a vapour delivery chamber, a developing chamber having a wall common with and dividing it from said vapour delivery chamber, an endless movable belt forming a-wall of said developing chamber opposite said common wall, said developing chamber having an inlet end and an outlet end, said endless belt providing a movable support for feeding the paper to be developed from said inlet end to'said outlet end, said common wall and said endless belt converging toward 4 said outlet end, said common wall having an opening adjacentsaid inlet end for continuously supplying vapour from said delivery chamber to said developing chamber, and means for returning vapour from said developing chamber to said storage chamber.

Landscapes

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

Description

Aug. 11, 1959 R s JACOBS 2,898,835
APPARATUS FOR T'HE' CONTINUOUS DEVELOPMENT OF LIGHT SENSITIVE PAPERS Filed Get. 8, 1956 2 Sheets-Sheet 1 Aug. 11, 1959 R. s. JACOBS 2,898,835
. APPARATUS. FOR THE CONTINUOQS DEVELOPMENT OF LIGHT SENSITIVE PAPERS Filed Oct.- 8, 1956 '2 Sheets- Sheet 2 United States Patent APPARATUS FOR THE CONTINUOUS DEVELOP- MENT OF LIGHT SENSITIVE PAPERS Ridley Saul Jacobs, London, England, assignor to The Nig Manufacturing Company Limited, London, England, a company of Great Britain Application October 8, 1956, Serial No. 614,595
6 Claims. (Cl. 95-94) This invention relates to apparatus for the continuous development of light sensitive materials, such as diazo type papers, by means of vapour such as ammonia vapour.
According to the present invention, in apparatus for continuous development of light sensitive materials, there is provided an ammonia tank, from which heated vapour is delivered to a developing chamber, through which the material to be developed is guided by an endless belt, such as a rubber blanket, one wall of said chamber forming a bafiie for vapour delivered to said chamber through an inlet from a delivery duct between the tank and developing chamber, the battle and belt converging together in the direction of feed of paper, the bafile also having a series of orifices therein through which vapour from the developing chamber flows back into the ammonia tank, whereby the flow of vapour occurs in a closed circuit.
The duct may terminate in a box-like chamber, communication between which and the developing chamber is formed by a continuous transverse slot in a common wall between said box-like and developing chambers, which wall forms the baffle which directs the vapour at an acute angle to the direction of feed of paper.
The slot in the baffle may be interrupted to form a number of apertures to establish desired communication between the box-like and developing chambers.
One form of apparatus according to this invention is illustrated in the accompanying drawings in which Figure 1 is a diagrammatic general view of the apparatus, and Figure 2 a perspective cut-away view of the ammonia tank.
Referring to the drawings, the apparatus comprises a generally L-shaped ammonia tank, shown at 1 (Figure 2), which is divided by walls 2 into an ammonia vapour storage chamber 3 and a duct in the form of an ammonia vapour delivery box-like chamber 4. Built on to the vapour storage chamber 3 is a pump housing 5 in which is housed a centrifugal pump shown generally at 6. The fan sucks vapour from the chamber 3 through the fan eye to feed it under pressure through an opening 7 in the rear wall of the chamber 4. The opposite Wall of the said delivery chamber 4 is formed with a continuous slot 8, which forms the delivery outlet for the ammonia vapour to a developing chamber 9 formed by one wall of the said chamber and by a rubber blanket 11 which is driven in a closed path over rollers 12, and over which blanket the paper to be developed is fed, the blanket and its rollers being housed within a casing 10. The common wall 14 of the box-like chamber 4 and developing chamber 9 converges from the outlet 8 adjacent which the paper is fed to the chamber 9 in the direction of feed of paper, the said outlet 8 being so arranged that the vapour is fed at an acute angle to the said direction of paper feed.
The vapour storage chamber 3 is formed with series of It will be ice in addition to the wall which forms the bafiie 14, and the casing 10, by overhanging parts 15 of the wall of the chamber 4.
16 indicates a trough into which ammonia liquid is fed 5 in known manner to provide vapour in the chamber 3.
Paper which has been developed, as it leaves the blanket 11, is picked up by a travelling belt 17 to deliver it in known manner to an outlet 18 or 19 as desired.
The ammonia vapour may be heated either in the chamber 3, at the suction side of the pump 6 or in the box-like chamber 4.
It will thus be apparent that, when paper to be developed is fed to the blanket 11 and this is driven, and the pump 6 is in action, ammonia vapour is sucked from the chamber 3, delivered through the opening 7 to the box-like chamber 4, and out therefrom in a heated condition through the slot 8, into the developing chamber 9 in which it flows evenly over the paper to be developed, and finally returns through the orifices 13 to the storage chamber 3.
With apparatus constructed in accordance with this invention it will be appreciated that a rapid stream of heated ammonia vapour can be directed at any desired velocity evenly across the surface of the paper to be developed, to assure a constantly uniform mixture, whilst the vapourising and/or heating can be carried out at almost any point in the closed circuit of vapour, for example either inside or outside the tank 1. Hence very rapid speeds of development are obtained and diazo type prints from all kinds of materials, such as thin papers or tracing cloths, can be developed without sticking or frequent distortion, and the dangers of condensation can be readily controlled.
What is claimed is:
1. Apparatus for the continuous development of light sensitive materials such as diazo type papers, including an ammonia vapour storage chamber, a developing chamber, delivery duct means between said ammonia vapour storage chamber and said chamber, through which duct means heated vapour from said ammonia vapour storage chamber can pass to said developing chamber, a movable endless belt forming one wall of said developing chamber, said belt constituting a moving guide for the material to be developed, a bafile constituted by another wall of said developing chamber, which battle guides the vapour delivered to said developing chamber through the duct means from said ammonia vapour storage chamber, said bafiie and said endless belt converging in the direction of feed of the material and said duct means opening into said developing chamber remote from the end thereof toward which said baffle and said endless belt converge, and a series of orifices in said bafiie through which vapour from the developing chamber can flow back into the ammonia vapour storage chamber, so that the flow of vapour occurs in a closed circuit.
2. Apparatus as claimed in claim 1 in which the duct means includes a box-like chamber, communication between which and the developing chamber is formed by a continuous transverse slot in the bathe which forms a common wall between said box-like and developing chambers which baflle directs the vapour at an acute angle to the direction of feed of paper.
3. Apparatus for the continuous development of light sensitive materials such as diazo type papers, including an ammonia vapor storage chamber, a developing chamber, delivery duct means: between said ammonia vapour storage chamber and said developing chamber, through which duct means heated vapour from said ammonia vapour storage chamber can pass to said developing chamber, a movable endless belt forming one wall of said developing chamber, said belt constituting a moving guide for the material to be developed, a bafile constituted by another wall of said developing chamber, which bafile guides the vapour delivered to said developing chamber through the duct means from. said ammonia vapour storage chamber said baflle and said endless belt converging in the direction-of feed of the material and said duct means opening into said developing chamber remote from the end thereof toward which said bafiie and said endless belt converge, and means for returning vapour from said developing chamber to said ammonia vapour storage chamber.
4. Apparatus for the continuous development of light sensitive materialsuch as diazo type papers, comprising atank, wall means forming within said tank a vapour storage chamber and a vapour delivery chamber, a developing chamber having a wall common with and dividing it from said vapour delivery chamber, an endless movable belt forming a-wall of said developing chamber opposite said common wall, said developing chamber having an inlet end and an outlet end, said endless belt providing a movable support for feeding the paper to be developed from said inlet end to'said outlet end, said common wall and said endless belt converging toward 4 said outlet end, said common wall having an opening adjacentsaid inlet end for continuously supplying vapour from said delivery chamber to said developing chamber, and means for returning vapour from said developing chamber to said storage chamber.
5. Apparatus as claimed in claim 4 wherein said opening forms the sole means for supplying vapour from said delivery chamber to said developing chamber and is so shaped as to deliver vapours entering said developing chamber at an acute angle to the direction of feed of the paper.
6. Apparatus as claimed in claim ,4 wherein said means for returning vapour from said developing chamber to said storage chamber is constituted by a series .of orifices in said common wall.
References Cited in the file of this patent FOREIGN PATENTS 115,003 Sweden Sept. 18, 1945 614,931 Great Britain Jan. 13, 1949 477,896 Canada Oct. 16, 1951
US614595A 1956-10-08 1956-10-08 Apparatus for the continuous development of light sensitive papers Expired - Lifetime US2898835A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US614595A US2898835A (en) 1956-10-08 1956-10-08 Apparatus for the continuous development of light sensitive papers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US614595A US2898835A (en) 1956-10-08 1956-10-08 Apparatus for the continuous development of light sensitive papers

Publications (1)

Publication Number Publication Date
US2898835A true US2898835A (en) 1959-08-11

Family

ID=24461949

Family Applications (1)

Application Number Title Priority Date Filing Date
US614595A Expired - Lifetime US2898835A (en) 1956-10-08 1956-10-08 Apparatus for the continuous development of light sensitive papers

Country Status (1)

Country Link
US (1) US2898835A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB614931A (en) * 1945-03-05 1948-12-30 Velsicol Corp Improvements in or relating to the production of new diels-alder adducts
CA477896A (en) * 1951-10-16 Tyrrell Arthur Methods and apparatus for developing photographic sensitized materials

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA477896A (en) * 1951-10-16 Tyrrell Arthur Methods and apparatus for developing photographic sensitized materials
GB614931A (en) * 1945-03-05 1948-12-30 Velsicol Corp Improvements in or relating to the production of new diels-alder adducts

Similar Documents

Publication Publication Date Title
US4175570A (en) Apparatus for building a continuous tobacco stream
US4452256A (en) Method and apparatus for conditioning tobacco
US3726023A (en) Web drier
US4346524A (en) Method and apparatus for conditioning tobacco
GB909422A (en) Apparatus for non-evaporative drying of film
GB1439864A (en) Copying amchines apparatus for partitioning
US2898835A (en) Apparatus for the continuous development of light sensitive papers
US2058983A (en) Apparatus for the development of photographic printing papers by means of gaseous developing agents
US2065032A (en) Calendering
US2096015A (en) Apparatus for the development of light sensitive material
US3988756A (en) Apparatus for processing webs of photographic material
GB2114420A (en) Tobacco filling apparatus
US2630744A (en) Evaporator for gas developing machines
US1999965A (en) Photographic developing apparatus
US2589748A (en) Dry printing and developing machine
GB971736A (en) Improvements in machines for manipulating cut tobacco
US4756672A (en) Liquid-ring pump with maintenance of liquid level
US3308556A (en) Material treating apparatus
US3491770A (en) Centrifugal tobacco stream forming apparatus
US1861329A (en) Apparatus for developing light-sensitive material
US3464690A (en) Diazo reproducing machine
JPH07310699A (en) Method and equipment for transferring liquid by using gas
US2200996A (en) Apparatus for continuously developing sensitized layers
GB842691A (en) Photographic vapour developing apparatus
US6751889B2 (en) Photographic media dryer