US3717747A - Drying means for electrophotographic copying machines - Google Patents

Drying means for electrophotographic copying machines Download PDF

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Publication number
US3717747A
US3717747A US00176821A US3717747DA US3717747A US 3717747 A US3717747 A US 3717747A US 00176821 A US00176821 A US 00176821A US 3717747D A US3717747D A US 3717747DA US 3717747 A US3717747 A US 3717747A
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US
United States
Prior art keywords
resistor
lamp
copying
drying means
drying
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
US00176821A
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English (en)
Inventor
M Fuyuki
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
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 Konica Minolta Inc filed Critical Konica Minolta Inc
Application granted granted Critical
Publication of US3717747A publication Critical patent/US3717747A/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
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/10—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer
    • G03G15/11—Removing excess liquid developer, e.g. by heat

Definitions

  • a lightening circuit for an original-illuminating lamp for an electrophotographic copying machine whereina resistance is adapted to be connected with said circuit when the illuminating lamp is lightened thereby to prevent original-supporting base etc., from overheating due to the illumination of the illuminating lamp is disclosed in the specification of US Pat. application Ser. No. 124,892 which was already filed by the applicant.
  • the heat generated by the resistor to be connected with said circuit has adverse influences on the copying machine.
  • the heat generated by the resistor raises the temperature within the copying machine considerably and heats the parts therein thereby to cause deterioration of the insulating property of the electrical parts etc.
  • the time during which an electric current is passed through the resistor in one copying cycle is about 0.9 seconds while it takes 2.3 to 6 seconds per one copying cycle.
  • the temperature within the copying machine will seriously increase due to accumulation of heat generated by the resistor.
  • the present invention has for its object to eliminate the above-mentioned drawback and also effectively utilize the heat generated in the copying machine by disposing the resistance within the copying paper drymg means.
  • FIG. 1 shows a lightening circuit for an original-illuminating lamp for use in a copying machine according to the present invention
  • FIG. 2 is a schematic illustration of one embodiment of the present invention.
  • FIG. 1 a lightening circuit for an original-illuminating lamp for use in a copying machine according to the present invention is schematically illustrated.
  • Reference numeral L denotes an original-illuminating lamp, S, a main switch and R a resistance.
  • Reference numeral S denotes a micro-switch designed to be closed in the lapse of a predetermined time (0.9 seconds) after main switch S, is closed.
  • micro-switch S is closed, and consequently electric current, flows through lamp L by way of switch S bypassing resistance R, thereby to radiate lamp L under steady state condition.
  • reference numeral 2 denotes a casing of drying means which constitutes a cylindrical tube. Disposed within said casing 2 are support plates 3 made of a heat insulating material such as asbestos, steatites and mica. Wound around support plates 3 is a heater 4 in the form of nicrome wire and a resistance R connected in series with lamp L is connected between support plates 3.
  • resistor R By thus disposing resistor R within the drying means, it is possible to completely eliminate various inconveniences due to the heat generated by resistor R, because the drying means is inherently designed so that the heat generated in it does not adversely affect the mechanism of the copying machine. Further, resistor R can be used for a heater in the drying means so as to achieve effective utilization of heat.
  • an electrophotographic copying means of the type having a copying section, separate means for drying the copy paper, and a power supply circuit for energizing an original illuminating lamp
  • the improvement comprising a resistor for controlling the electric current supply to said lamp, said resistor being disposed within said means for drying the copy paper whereby the heat generated by said resistor does not raise the temperature within the said copying section.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Fixing For Electrophotography (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Resistance Heating (AREA)
  • Control Of Resistance Heating (AREA)
US00176821A 1970-09-04 1971-09-01 Drying means for electrophotographic copying machines Expired - Lifetime US3717747A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1970087645U JPS5126148Y1 (enrdf_load_stackoverflow) 1970-09-04 1970-09-04

Publications (1)

Publication Number Publication Date
US3717747A true US3717747A (en) 1973-02-20

Family

ID=13920703

Family Applications (1)

Application Number Title Priority Date Filing Date
US00176821A Expired - Lifetime US3717747A (en) 1970-09-04 1971-09-01 Drying means for electrophotographic copying machines

Country Status (4)

Country Link
US (1) US3717747A (enrdf_load_stackoverflow)
JP (1) JPS5126148Y1 (enrdf_load_stackoverflow)
DE (1) DE2143371C3 (enrdf_load_stackoverflow)
GB (1) GB1331526A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4639405A (en) * 1985-09-30 1987-01-27 Eastman Kodak Company Method and apparatus for fixing toner images
EP0365251A1 (en) * 1988-10-15 1990-04-25 Brother Kogyo Kabushiki Kaisha Sheet heating device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2403711A (en) * 1943-10-27 1946-07-09 Eastman Kodak Co Control for photographic copying apparatus
US3283126A (en) * 1963-12-10 1966-11-01 Du Pont Electric strip heater
US3379878A (en) * 1962-02-15 1968-04-23 Lumoprint Zindler Kg Thermographic reproduction apparatus with means to apply the radiation sensitive material just prior to exposure
US3448970A (en) * 1967-08-04 1969-06-10 Addressograph Multigraph Fuser for electrostatic images

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2403711A (en) * 1943-10-27 1946-07-09 Eastman Kodak Co Control for photographic copying apparatus
US3379878A (en) * 1962-02-15 1968-04-23 Lumoprint Zindler Kg Thermographic reproduction apparatus with means to apply the radiation sensitive material just prior to exposure
US3283126A (en) * 1963-12-10 1966-11-01 Du Pont Electric strip heater
US3448970A (en) * 1967-08-04 1969-06-10 Addressograph Multigraph Fuser for electrostatic images

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4639405A (en) * 1985-09-30 1987-01-27 Eastman Kodak Company Method and apparatus for fixing toner images
EP0365251A1 (en) * 1988-10-15 1990-04-25 Brother Kogyo Kabushiki Kaisha Sheet heating device
US4981433A (en) * 1988-10-15 1991-01-01 Brother Kogyo Kabushiki Kaisha Sheet heating device

Also Published As

Publication number Publication date
GB1331526A (en) 1973-09-26
JPS5126148Y1 (enrdf_load_stackoverflow) 1976-07-02
DE2143371A1 (de) 1972-04-13
DE2143371B2 (enrdf_load_stackoverflow) 1974-04-04
DE2143371C3 (de) 1974-12-05

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