US3482918A - Exposure assembly for light sensitive diazo-type copy paper - Google Patents

Exposure assembly for light sensitive diazo-type copy paper Download PDF

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Publication number
US3482918A
US3482918A US672759A US3482918DA US3482918A US 3482918 A US3482918 A US 3482918A US 672759 A US672759 A US 672759A US 3482918D A US3482918D A US 3482918DA US 3482918 A US3482918 A US 3482918A
Authority
US
United States
Prior art keywords
copy paper
exposure assembly
air
light sensitive
lamps
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
US672759A
Other languages
English (en)
Inventor
Bastiaan K Nederlof
Hendricus G M Van Der Stap
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
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 GAF Corp filed Critical GAF Corp
Application granted granted Critical
Publication of US3482918A publication Critical patent/US3482918A/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
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/02—Exposure apparatus for contact printing
    • G03B27/14—Details
    • G03B27/26—Cooling
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/02—Exposure apparatus for contact printing
    • G03B27/14—Details
    • G03B27/16—Illumination arrangements, e.g. positioning of lamps, positioning of reflectors

Definitions

  • This invention relates to a printing and developing .apparatus and, more particularly, to an improved light exposure assembly for sensitizing light sensitive copy paper.
  • the present invention provides for an improved and novel fluorescent lamp exposure assembly for light sensitive diazo-type copy papers.
  • the novel exposure assembly incorporates a cooling air arrangement whereby a controlled and predetermined flow of air is maintained about the fluorescent lamps.
  • This cooling air flow is achieved by positioning a plurality of fluorescent lamps about a hollow tube, which may serve as a light reflector, and wherein the tube has a plurality of air holes in axial and radial registry with the lamps.
  • a suitable air suction blower may be attached to one end of the tube, thus creating a condition of reduced air pressure in the interior of the tube. Consequently, a flow of air will be created, whereby a stream of air will be drawn past the lamps into the tube.
  • Another object of the present invention is to provide an exposure assembly for sensitizing light sensitive diazo type copy paper, including a tube member about which the lamps are clustered and including cooling air circulating means associated with the tube member for controlling the lamp temperatures.
  • FIG. 1 is a cross-sectional elevational view of an exposure assembly according to the present invention.
  • FIG. 2 is a sectional view along line 22 in FIG. 1.
  • FIGS. 1 and 2 illustrate a light exposure assembly for light sensitive copy paper, which is generally designated as 10.
  • the exposure assembly 10 includes a transparent printing cylinder 12, usually formed of a heat-resistant glass or similar refractory material.
  • the cylinder 12 is mounted between two end walls 14 and 16 which may constitute frame portions of a printing and developing apparatus. End walls 14 and 16 include circular openings 18 and 20 which are coaxial and concentrically aligned with transparent cylinder 12.
  • an elongate hollow tube member 22 Disposed concentrically within printing cylinder 12 is an elongate hollow tube member 22 which extends through cylinder 12 so as to protrude outwardly of circular openings 18 and 20.
  • One end of tube member 22 may be sealed olf by a flange or end plate 24.
  • the other or distal end of tube member 22 is in turn connected to the inlet of a suitable air suction pump or blower 26.
  • a plurality of radially outwardly extending flanges 28 are positioned about and attached to the external circumferential surface of tube member 22 so as to form supoprt or mounting brackets for a plurality of fluorescent lamps 30.
  • Lamps 30 are spaced about a large peripheral portion of tube member 22 and are positioned so as to extend longitudinally thereof throughout the length of transparent printing cylinder 12. Suitable electrical connections (not shown) may be provided in flanges 29 to Y facilitate lighting of the fluorescent lamps 30.
  • Hollow tube member 22 includes a plurality of apertures 32 whereby the interior thereof is placed in air circulating communication with the outer surface or surroundings.
  • the apertures 32 are positioned in proximity to or beneath each of the fluorescent lamps 30 and should be spaced along the length of the lamps.
  • a diazotype copy paper which is to be sensitized by exposure to light is conveyed past transparent printing cylinder 12 by a suitable conveyor belt 34, the latter of which is entrained about rollers 36 and 38.
  • the fluorescent lights 30 are electrically activated through suitable switch means (not shown) actuated by passage of the copy paper.
  • air suction blower 26 will draw air into tube member 22 from externally thereof through apertures 32. This, in effect, will circulate air throughout the annular air space or chamber 40 between tube member 22 and transparent printing cylinder 12, and then draw the air past fluorescent lamps 30 into tube member 22 through the aperture 32. Since the annular air chamber 40 is in communication with the cooler air surrounding exposure assembly 10, a constant stream of cooling air is drawn past fluorescent lamps 30 into the tube member 22.
  • temperatures of the exposure assembly 10 may be maintained at a desired printing efliciency level.
  • the air flow will also serve to maintain surrounding assembly components at lower operating temperatures, thereby preventing possible heat damage to painted or enamelled apparatus elements.
  • hollow tube member 22 also facilitates its use as a light reflector for fluorescent lamps 30.
  • the tube member 22 may be formed from a metal with a high reflective efliciency for the actinic radiation used in diazo machines. It is known that a metal such as pure aluminum has this property. Additionally, the tube member provides a backbone or support for the cluster of fluorescent lamps 30, which may thus be installed as an integral unit in the exposure assembly 10.
  • an exposure assembly comprising:
  • each of said wall members having at least One circular opening
  • tubular member including a plurality of apertures extending therethrough
  • tubular member includes radially extending flange portions, said flange portions being axially spaced longitudinally of said tubular member so as to form mounting supports for said elongate lamps.
  • tubular member is formed essentially of metal so as to provide a light reflecting surface for said lamps.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
US672759A 1967-10-04 1967-10-04 Exposure assembly for light sensitive diazo-type copy paper Expired - Lifetime US3482918A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US67275967A 1967-10-04 1967-10-04

Publications (1)

Publication Number Publication Date
US3482918A true US3482918A (en) 1969-12-09

Family

ID=24699897

Family Applications (1)

Application Number Title Priority Date Filing Date
US672759A Expired - Lifetime US3482918A (en) 1967-10-04 1967-10-04 Exposure assembly for light sensitive diazo-type copy paper

Country Status (7)

Country Link
US (1) US3482918A (de)
JP (1) JPS4827931B1 (de)
CH (1) CH477015A (de)
DE (2) DE6750311U (de)
FR (1) FR1586248A (de)
GB (1) GB1195517A (de)
NL (1) NL6814214A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779640A (en) * 1972-10-13 1973-12-18 Xerox Corp Heating apparatus for scan lamp
US3959644A (en) * 1973-10-29 1976-05-25 Feinmechanische Werke Mainz Gmbh Apparatus for adjustably positioning an air-cooled device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2311849A (en) * 1940-10-17 1943-02-23 Bruning Charles Co Inc Cooling device for printing machines
US3329076A (en) * 1963-06-26 1967-07-04 Admel Internat Ltd Photocopying machines
US3330180A (en) * 1964-10-14 1967-07-11 Xerox Corp Illumination control system
US3361047A (en) * 1964-06-17 1968-01-02 Grinten Chem L V D Photo-printing apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2311849A (en) * 1940-10-17 1943-02-23 Bruning Charles Co Inc Cooling device for printing machines
US3329076A (en) * 1963-06-26 1967-07-04 Admel Internat Ltd Photocopying machines
US3361047A (en) * 1964-06-17 1968-01-02 Grinten Chem L V D Photo-printing apparatus
US3330180A (en) * 1964-10-14 1967-07-11 Xerox Corp Illumination control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779640A (en) * 1972-10-13 1973-12-18 Xerox Corp Heating apparatus for scan lamp
US3959644A (en) * 1973-10-29 1976-05-25 Feinmechanische Werke Mainz Gmbh Apparatus for adjustably positioning an air-cooled device

Also Published As

Publication number Publication date
NL6814214A (de) 1969-04-09
FR1586248A (de) 1970-02-13
DE6750311U (de) 1969-01-02
DE1797458A1 (de) 1970-12-17
GB1195517A (en) 1970-06-17
JPS4827931B1 (de) 1973-08-28
CH477015A (de) 1969-08-15

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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