US3751665A - Preheat type copying apparatus - Google Patents

Preheat type copying apparatus Download PDF

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Publication number
US3751665A
US3751665A US00167338A US3751665DA US3751665A US 3751665 A US3751665 A US 3751665A US 00167338 A US00167338 A US 00167338A US 3751665D A US3751665D A US 3751665DA US 3751665 A US3751665 A US 3751665A
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US
United States
Prior art keywords
infrared rays
heat
copying apparatus
press plate
film
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
US00167338A
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English (en)
Inventor
S Yabe
T Okada
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3751665A publication Critical patent/US3751665A/en
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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
    • G03B27/30—Details adapted to be combined with processing apparatus
    • G03B27/306—Heat development

Definitions

  • ABSTRACT A preheat-type copying apparatus wherein an original and a heat-sensitive copying paper are placed between a heat-resisting press plate transparent to infrared rays and a cushion member. An electroconductive film for preheating the copying paper, and transparent to infrared rays, is provided on the surface of thepress plate.
  • This invention relates to a heat-sensitive copying apparatus for reproducing an original by the irradiation of infrared rays.
  • the original and a heat-sensitive copying paper are interleaved between a heat-resisting glass plate (or Teflon film) transparent to infrared rays and a cushion member in close contact with each other.
  • Infrared rays then are applied from an infrared lamp to the outer side of the glass plate.
  • the infrared rays are applied onto the copying paper until its temperature is sufficiently high to cause color-forming or reproduction.
  • the structural members are also heated by the infrared rays, which may result in increasing the temperature of the heat-sensitive paper to cause fogging or color formation at unnecessary areas.
  • the reproduction can be conducted with less infrared energy than in the case where there is no such preheating operation.
  • a flash discharge lamp for instantaneously flashing the infrared energy for a short time may be used, without requiring the use of an infrared lamp of high power output using a tungsten filament of the type heretofore used.
  • a preheat-type copying apparatus wherein an original and a heat-sensitive copying paper, are placed between a heat-resisting press plate transparent to infrared rays and a cushion member, and an electroconductive film for preheating the copying paper and transparent to infrared rays is provided on the surface of the press plate.
  • FIG. I is a perspective view of a conventional copying apparatus.
  • FIG. 2 is a perspective view of a copying apparatus constructed according to the present invention.
  • the original 1 and a heatsensitive copying paper 2 are interleaved between a heat-resisting glass plate 3 (or Teflon film) transparent to infrared rays and a cushion member 4.
  • An infrared lamp 5 of high power output is utilized to create infrared radiation which is applied to the heat-sensitive copying paper 2 through the plate 3 until the temperature of the copying paper is sufficiently high to cause color formation or reproduction of the original.
  • An original paper 1 and a heat-sensitive paper 2 are superimposed and are interleaved closely between the press plate 6 and a cushion member 4 formed of any suitable material.
  • a power supply-9 is connected to the electrodes 8 and 8' for creating an electric current so as to heat the film 7 and press plate 6, thereby preheating the heat-sensitive paper 2 in such a manner that the heat-sensitive paper 2 does not cause fogging when the infrared rays are subsequently applied for reproduction.
  • a flash discharge lamp 10 may be used to generate color or reproduction with only a small amount of infrared ray energy, owing to the preheating of the copying paper 2.
  • this invention thus provides easy generation of color or reproduction with only a small amount of infrared energy.
  • a copying apparatus utilizing infrared rays wherein an original and a heat-sensitive copying paper are placed between a heat-resisting press plate transparent to infrared rays and a cushion member
  • the improvement comprising: an electroconductive film for preheating the heat-sensitive copying paper and transparent to infrared rays provided on the outer surface of the press plate, and means for energizing said film.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
US00167338A 1970-07-30 1971-07-29 Preheat type copying apparatus Expired - Lifetime US3751665A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1970081316U JPS51944Y1 (en:Method) 1970-07-30 1970-07-30

Publications (1)

Publication Number Publication Date
US3751665A true US3751665A (en) 1973-08-07

Family

ID=33068616

Family Applications (1)

Application Number Title Priority Date Filing Date
US00167338A Expired - Lifetime US3751665A (en) 1970-07-30 1971-07-29 Preheat type copying apparatus

Country Status (3)

Country Link
US (1) US3751665A (en:Method)
JP (1) JPS51944Y1 (en:Method)
CA (1) CA939736A (en:Method)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3904877A (en) * 1971-12-28 1975-09-09 Asahi Dow Ltd Imaged sheet or film and method and apparatus for preparing same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2616961A (en) * 1946-09-23 1952-11-04 Groak Josef Printing
US2770534A (en) * 1949-03-16 1956-11-13 Printing Arts Res Lab Inc Method and material for making overlay masks
US2976415A (en) * 1958-07-21 1961-03-21 Minnesota Mining & Mfg Heat-sensitive copy-paper

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2616961A (en) * 1946-09-23 1952-11-04 Groak Josef Printing
US2770534A (en) * 1949-03-16 1956-11-13 Printing Arts Res Lab Inc Method and material for making overlay masks
US2976415A (en) * 1958-07-21 1961-03-21 Minnesota Mining & Mfg Heat-sensitive copy-paper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3904877A (en) * 1971-12-28 1975-09-09 Asahi Dow Ltd Imaged sheet or film and method and apparatus for preparing same

Also Published As

Publication number Publication date
CA939736A (en) 1974-01-08
JPS51944Y1 (en:Method) 1976-01-12

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