US3361047A - Photo-printing apparatus - Google Patents

Photo-printing apparatus Download PDF

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Publication number
US3361047A
US3361047A US462227A US46222765A US3361047A US 3361047 A US3361047 A US 3361047A US 462227 A US462227 A US 462227A US 46222765 A US46222765 A US 46222765A US 3361047 A US3361047 A US 3361047A
Authority
US
United States
Prior art keywords
cylinder
belts
photo
light
printing apparatus
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
US462227A
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English (en)
Inventor
Breuers Theo Pierre Chretien
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.)
Chemische Fabriek L Van der Grinten NV
Original Assignee
Grinten Chem L V D
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 Grinten Chem L V D filed Critical Grinten Chem L V D
Application granted granted Critical
Publication of US3361047A publication Critical patent/US3361047A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to a photo-copying apparatus comprising a rotating exposure cylinder made of glass or similar material of poor heat-conductivity, a system of narrow belts, arranged side by side with small interspaces, for pressing the printing set (original and light-sensitive material) against the cylinder, and a lamp mounted inside the cylinder for exposing the printing set through the wall of the cylinder.
  • the belts in known apparatus of this type are moving endless belts, which are passed around a part of the cylinder and further around a number of guide rollers and driving rollers respectively.
  • some rollers are provided with thin discs, which protrude between the belts.
  • the belts are spaced slightly apart, e.g. with slit-shaped interspaces of 1 to 2 mm.
  • the glass cylinder is heated by the radiation of the lamp. When no copies are made, heat is transmitted from the cylinder to the belts in the places where the belts contact the cylinder. In these places the cylinder is cooled as it were. In the places where there are slits between the belts, the cylinder transmits no heat, or at least much less. Since glass is a poor heat-conductor, there is only a small heat-exchange across the surface of the cylinder. Thus the zones where the slits are present continuously remain warmer than the rest of the surface.
  • an apparatus as referred to in the preamble is provided with a number of orifices for the discharge of cooling air, said orifices being provided in a stationary device outside the cylinder and being directed at the slit-shaped zones, which are present between the belts, where the latter are pressing against the cylinder.
  • the orifices are simple perforations arranged in rows in the wall of a blowing box, said wall being curved and being substantially uniformly spaced from the moving cylinder surface.
  • FIGURE 1 is a diagrammatical vertical cross-section through an apparatus according to the invention
  • FIGURE 2 is a perspective view of part of the apparatus according to FIGURE 1;
  • FIGURE 3 is a perspective view of the part of the apparatus according to FIGS. 1 and 2, which is essential in view of the invention.
  • a lamp 1 e.g. a high-pressure mercury lamp, is placed in the centre line of a glass cylinder 2, which is adapted to rotate about its own axis.
  • a number of narrow endless conveyor belts 3, arranged side by side, are passed around and a number of guide-rollers 4, 5, 6, 7, and 8, the rollers 4 and 8 being provided with disc-shaped parts 9, each of which protrudes between two belts, by which means the belts are kept in alignment.
  • Narrow interspaces e.g. with a width of 1-2 mm., are thus formed between the belts 3.
  • the glass cylinder 2 is rotatably driven, and superimposed originals and sheets of light-sensitive material are guided between the belts 3 and the cylinder 2, and are pressed against the cylinder- 2 by means of the belts 3, so that they are moved at the same rate as said parts 2 and 3, the lamp 1 giving an exposure which is sufiicient for obtaining, after development, a good photo-copy of the original on the light-sensitive material.
  • a considerable part of the surface of the cylinder 2 is surrounded by a blowing box 10, which is connected by an air-supply pipe 11, in which is fitted a control valve 12, to an air blower 14.
  • the box 10 is provided with rows of small perforations 13, through which the air can escape from the box, which for the rest is closed, and these rows of perforations are situated exactly opposite the intersp-aces between the belts 3.
  • the glass cylinder which is cooled by means of the belts 3 in those places where they contact the cylinder when no paper is present between the belts and the cylinder, is also cooled between said belts, in consequence of which the surface can be kept at a uniform temperature.
  • the control valve 12 the quantity of air blown out can be regulated in such a way that it produces the same cooling effect as the belts.
  • a photo-printing apparatus comprising a rotating exposure cylinder made of glass or similar material of poor heat-conductivity, a system of narrow belts, arranged side by side with small interspaces, for pressing the original and light-sensitive material against the cylinder, and a lamp mounted inside the cylinder for exposing the original and light-sensitive material through the wall of 3 the cylinder, characterized in that the apparatus is provided with a number of orifices for the discharge of cooling air, said orifices being provided in a stationary device outside the cylinder and being directed at the slitshaped intersp aces which are present between the belts, Where the latter are pressing against the cylinder.

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)
US462227A 1964-06-17 1965-06-08 Photo-printing apparatus Expired - Lifetime US3361047A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6406895A NL6406895A (enrdf_load_stackoverflow) 1964-06-17 1964-06-17

Publications (1)

Publication Number Publication Date
US3361047A true US3361047A (en) 1968-01-02

Family

ID=19790333

Family Applications (1)

Application Number Title Priority Date Filing Date
US462227A Expired - Lifetime US3361047A (en) 1964-06-17 1965-06-08 Photo-printing apparatus

Country Status (7)

Country Link
US (1) US3361047A (enrdf_load_stackoverflow)
BE (1) BE664332A (enrdf_load_stackoverflow)
CH (1) CH438938A (enrdf_load_stackoverflow)
DE (1) DE1254465B (enrdf_load_stackoverflow)
FR (1) FR1434746A (enrdf_load_stackoverflow)
NL (1) NL6406895A (enrdf_load_stackoverflow)
SE (1) SE316980B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433566A (en) * 1965-08-02 1969-03-18 Grinten Chem L V D Cooling means for an exposure cylinder of photoprinting apparatus
US3482918A (en) * 1967-10-04 1969-12-09 Gaf Corp Exposure assembly for light sensitive diazo-type copy paper
US3498716A (en) * 1967-01-27 1970-03-03 Centenary Central Mechanism for reproducing layouts of modified dimensions
US4176949A (en) * 1978-08-03 1979-12-04 Burgess Industries, Inc. Microfiche exposer
US4201466A (en) * 1979-02-05 1980-05-06 Am International, Inc. Photoprinter with self-locating roll spreader

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3574460A (en) * 1968-11-14 1971-04-13 Alvin A Snaper High-pressure gate for photographic contact printing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US910832A (en) * 1907-12-20 1909-01-26 Charles De Lukacsevics Blue-printing machine.
CA522411A (en) * 1956-03-06 O. Trump Frederick Printing lamp and cylinder cooling means
FR1266482A (fr) * 1959-02-11 1961-07-17 Procédé et appareil pour le tirage de copies
US3060828A (en) * 1960-06-13 1962-10-30 Gen Aniline & Film Corp Diazo type reproducing apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1794537U (de) * 1959-05-21 1959-08-27 Agfa Ag Vorrichtung zur herstellung von direkten positiven nach dem silbersalzdiffusionsverfahren.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA522411A (en) * 1956-03-06 O. Trump Frederick Printing lamp and cylinder cooling means
US910832A (en) * 1907-12-20 1909-01-26 Charles De Lukacsevics Blue-printing machine.
FR1266482A (fr) * 1959-02-11 1961-07-17 Procédé et appareil pour le tirage de copies
US3060828A (en) * 1960-06-13 1962-10-30 Gen Aniline & Film Corp Diazo type reproducing apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433566A (en) * 1965-08-02 1969-03-18 Grinten Chem L V D Cooling means for an exposure cylinder of photoprinting apparatus
US3498716A (en) * 1967-01-27 1970-03-03 Centenary Central Mechanism for reproducing layouts of modified dimensions
US3482918A (en) * 1967-10-04 1969-12-09 Gaf Corp Exposure assembly for light sensitive diazo-type copy paper
US4176949A (en) * 1978-08-03 1979-12-04 Burgess Industries, Inc. Microfiche exposer
US4201466A (en) * 1979-02-05 1980-05-06 Am International, Inc. Photoprinter with self-locating roll spreader

Also Published As

Publication number Publication date
BE664332A (enrdf_load_stackoverflow) 1965-11-24
DE1254465B (de) 1967-11-16
CH438938A (de) 1967-06-30
FR1434746A (fr) 1966-04-08
NL6406895A (enrdf_load_stackoverflow) 1965-12-20
SE316980B (enrdf_load_stackoverflow) 1969-11-03

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