US3717747A - Drying means for electrophotographic copying machines - Google Patents
Drying means for electrophotographic copying machines Download PDFInfo
- 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
- Authority
- 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
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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.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Or Security For Electrophotography (AREA)
- Resistance Heating (AREA)
- Control Of Resistance Heating (AREA)
- Fixing For Electrophotography (AREA)
- Photographic Processing Devices Using Wet Methods (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
Abstract
Apparatus for controlling the current to a lamp in an electrophotographic copying machine as provided comprising a resistor mounted in the power circuit to the lamp, said resistor being mounted in the copy paper drying means associated with said copying machine whereby the heat generated by said resistor does not raise the temperature within the copying section of the apparatus.
Description
[ Feb. 20, 1973 United States Patent 1 Fuyuki S T. N m m A uh P c m mT m a .m S m w W N U Q 1 G N n P 0 C C I H n MR FG SO T A0 ms M E 6mm m Rm DEM m 3,379,878 4/1968 Limberger 3,448,970 6/1969 Kolibas.............. 2,403,711 7/1946 Egan 3,283,126 11/1966 Velve [22] Filedl P 1971 Primary Examiner-C. L. Albritton [21] Appl. No.: 176,821 Attorney-Jordan B. Bierman et a1.
[57] ABSTRACT Apparatus for controlling the current to a lamp in an [30] Foreign Application Priority Data Sept. 4, 1970 (utility model) electrophotographic copying machine as provided [52] us Cl 219/216 219/388 355/10 comprising a resistor mounted in the power circuit to 51 ...Hti5b 1/00 the lamp Said resist being mmmted the copy paper drying means associated with, said copying machine whereby the heat generated by said resistor [58] Field of'Search 263/6 E, 8; 250/65 T, 65 ZE does not raise the temperature within the copying section of the apparatus.
2 Claims, 2 Drawing Figures PAIENTEDrwzmen I INVENTOR Aib f Jaw ATTOR NEYS DRYING MEANS FOR ELECTROPHOTOGRAPIIIC COPYING MACHINES This invention relates to a drying means for an electrophotographic copying machine using liquid development.
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.
However, it was found later on that the abovementioned lightening circuit for an original illuminating lamp has a drawback that the heat generated by the resistor to be connected with said circuit has adverse influences on the copying machine. Stated more specifically, 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. However, in case where copying is made continuously, 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.
In order that the present invention may be more clearly understood, the following description is given by way of an example with reference to the accompanying drawings, in which:
FIG. 1 shows a lightening circuit for an original-illuminating lamp for use in a copying machine according to the present invention; and
FIG. 2 is a schematic illustration of one embodiment of the present invention.
Referring to 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.
When switch S, is closed, an electric current is allowed to pass through resistor R and lamp L, thereby lighting up the lamp.
In the lapse of a predetermined time thereafter, 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.
In FIG. 2, 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.
All flow generated by a fan (not shown) IS blown into the casing 2 as shown by arrow mark 5. During its passage through the casing 2, the air is heated by resistor R and, nicrome wire heater 4 and the hot wind resulted flows on a copying paper left still undried (not shown) which has passed through a developing solution, thereby vaporizing the solution on the paper to have it dried.
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.
What is claimed is:
1. In 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.
2. The apparatus specified in claim 1 further including means for bypassing said resistor when full current to said lamp is desired.
Claims (2)
1. In 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.
1. In 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.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1970087645U JPS5126148Y1 (en) | 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 (en) |
JP (1) | JPS5126148Y1 (en) |
DE (1) | DE2143371C3 (en) |
GB (1) | GB1331526A (en) |
Cited By (2)
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)
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 |
-
1970
- 1970-09-04 JP JP1970087645U patent/JPS5126148Y1/ja not_active Expired
-
1971
- 1971-08-30 DE DE2143371A patent/DE2143371C3/en not_active Expired
- 1971-09-01 US US00176821A patent/US3717747A/en not_active Expired - Lifetime
- 1971-09-02 GB GB4098771A patent/GB1331526A/en not_active Expired
Patent Citations (4)
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)
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 |
---|---|
DE2143371B2 (en) | 1974-04-04 |
DE2143371A1 (en) | 1972-04-13 |
DE2143371C3 (en) | 1974-12-05 |
GB1331526A (en) | 1973-09-26 |
JPS5126148Y1 (en) | 1976-07-02 |
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