US3677632A - Environment control device for electrophotographic apparatus - Google Patents

Environment control device for electrophotographic apparatus Download PDF

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US3677632A
US3677632A US71163A US3677632DA US3677632A US 3677632 A US3677632 A US 3677632A US 71163 A US71163 A US 71163A US 3677632D A US3677632D A US 3677632DA US 3677632 A US3677632 A US 3677632A
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Prior art keywords
control device
baffle plate
heating
feed path
supply
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US71163A
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William A Macdonald Jr
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Eastman Kodak Co
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Eastman Kodak Co
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    • 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
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6597—Apparatus which relate to the handling of copy material the imaging being conformed directly on the copy material, e.g. using photosensitive copy material, dielectric copy material for electrostatic printing
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D22/00—Control of humidity
    • G05D22/02—Control of humidity characterised by the use of electric means
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00379—Copy medium holder
    • G03G2215/00383—Cassette
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00405—Registration device
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00417—Post-fixing device
    • G03G2215/00421—Discharging tray, e.g. devices stabilising the quality of the copy medium, postfixing-treatment, inverting, sorting
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00443—Copy medium
    • G03G2215/00518—Recording medium, e.g. photosensitive
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00544—Openable part of feed path
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00548—Jam, error detection, e.g. double feeding
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00666—Heating or drying device
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00717—Detection of physical properties
    • G03G2215/00776—Detection of physical properties of humidity or moisture influencing copy sheet handling

Definitions

  • One of the heaters is arranged to heat both the supply of I receiver material and a paper feed path along which the material is fed from the supply. Thus, paper which remains in the feed path when the machine is not operating will be maintained at the correct moisture content.
  • FIG. 2
  • This invention relates to a humidity control device, and more particularly to a humidity control device for use in an electrophotographic apparatus.
  • an electrophotographic image is placed on a receiver material having a conductive backing and a photoconductive surface, such as a zinc oxide, upon which the image is placed.
  • This material is I fed from a supply along a feed path to a charging station, such electrostatic charge on the photoconductive surface.
  • the charged sheet is fed to an exposure station where it is exposed to a light pattern which causes the photoconductive surface to be discharged in the exposed areas while retaining an electrostatic charge in the charged areas to form an electrostatic charge pattern.
  • the photoconductive sheet is then fed to a developing station where toner particles of opposite charge to the electrostatic charge pattern are attracted thereto to form a toner image on the pho toconductive surface.
  • the sheet then passes through a fusing station to cause the toner image to adhere tothe receiver sheet to form a permanent copy.
  • the resistivity of the receiver may be decreased to a level which results in an image of reduced quality because of an increase in the relative humidity thereof. This is particularly true when the apparatus is idle for extended periods of time, such as overnight or over a weekend. In such situations, the supply of receiver material,
  • the moisture content of the receiver both in the supply and in the feed path, may increase to an undesirably high level which adversely effects the charge-holding characteristics of the receiver.
  • a humidity-controlled storage compartment is shown in U.S. Pat. No. 3,349,221 to Schultze et al. for controlling the moisture content of a stack of cut electrophotographic receiver sheets.
  • a heating element is provided in a hinged cover which is controlled by a humidistat to control the relative humidity within the compartment.
  • a humidity control device is provided adjacent a support for receiver material to be fed along a feed path which includes a heating means which provides a dual function of heating the supply and heating the feed path so that the moisture content of the material can be controlled both at the supply and along the feed path.
  • the heating means can be controlled by a humidistat so that it goes on only when the relative humidity rises above a predetermined level and turns off when the relative humidity drops below a predetermined level.
  • a second heater can be provided on the opposite side of the supply to assure a uniform relative humidity level all around the supply.
  • thermostats can be provided for controlling of the heaters.
  • a reader-printer R is illus- 'trated in FIG. 1 which is provided with a print module P, as
  • the reader has means for projecting an image of an original, such as microfilm 2, onto a viewing screen 4. If a print of a particular original is needed a print button on control panel 6 may be pressed to cause the image to be projected onto a charged sheet of photosensitive material supplied from roll 8.
  • the printer P is mounted in a drawer 10 which is movable from the open position shown in FIG. 1 to a closed position in which switch 12 is closed to cause thehumidity control device to operate as will be more fully understood from the description below.
  • supply roll 8 is supported on a shaft 14 extendingthrough spaced side plates 16 of printer module P.
  • the paper is fed from the roll under a bail l8 and over a roller 20 and along a feed path defined by a pair of opposed feed rollers 22 and 24.
  • a heater 26 is provided on a baffle plate 28 between the supply roll and the feed path provided by rollers 22 and 24 and is connected in series with a thermostat 30 to prevent the baffle plate from overheating.
  • the heater 26 serves the dual function of heating supply roll 8 and also heating the feed path so that the moisture content of the paper can be maintained within predetermined limits.
  • a second heater element 32 is provided on a baffle plate 34 mounted below supply roll 8 and connected to a thermostat 36 mounted on the baffle plate 34.
  • a humidistat 38 shown in FIG.
  • a completed copy 44 from the printer module P is fed between spaced guide plates 46 and 48 for feeding the copy by means of a conveyor C to a discharge chute, of FIG. 1.
  • conveyor C includes a plate 48 removably mounted on spaced pins 52 by brackets 54, as shown in FIG. 2, so that it can be removed by the operator to correct paper jams.
  • a switch 56 is provided which is illustrated as being mounted on backwall 40 by means of an angle bracket 58 and is closed by means of an ear 60 on plate 48.
  • standby switch 62 is provided which is shown as being mounted adjacent roll 8 in FIG. 1 and is controlled by the operator to turn off the humidity control device, if desired.
  • Standby switch 62 is a double pole switch, as shown in FIG. 3, having one side connected to one side of a source of potential and the other side connected in series with door operated switch 12, chute operated switch 56, and humidistat 38.
  • a switch 64 which is opened by current through coil 66 when the print module P is in operation to discontinue operation of the heater during the print cycle. This is desirable to reduce the total power requirements of the apparatus.
  • the opposite side of switch 64 is connected to the opposite side of the source of potential.
  • Double pull switch 62 also is connected to opposite sides of the heaters and thermostats, as shown.
  • a humidity control device which includes heating elements to maintain relative humidity within a predetermined range so that the moisture content of the receiver is neither too high nor too low
  • one heater is advantageously positioned to serve the dual function of heating the supply of photoconductive material and heating the feed path along which the material is fed from the supply roll. This is advantageous when the apparatus has been idle for some period of time, such as overnight or over a weekend since a portion of the photoconductive sheet 9 always extends into the feed path and also must be maintained at the proper moisture content level along with the supply roll so that the first prints will be satisfactory.
  • a humidity control device having an enabled and disabled condition, for use in an electrophotographic apparatus used under varying relative humidity conditions for controlling the moisture content of photoconductive receiver material, said control device including:
  • a support for the supply of receiver material means defining a feed path for feeding the receiver material from said support; first controllable means for simultaneously heating the supply on said support and for heating said feed path; and
  • a humidity control device having an enabled and disabled condition, for use in an electrophotographic apparatus used under varying relative humidity conditions for controlling the moisture content of photoconductive receiver material, said control device including:
  • a first baffle plate mounted between said support and said feed path defining means for heating both said supply roll and said heat path;
  • a first controllable heater mounted on said first baffle for heating said first baffle plate
  • a first thermostat mounted on said first baffle plate and connected to said heater for controlling the temperature of said first baffle plate
  • a second controllable heating means mounted on said second baffle plate for heating said second baffle plate
  • a second thermostat mounted on said second baffle plate and connected to said second heating means for controlling the temperature of said second baffle plate.
  • a humidity control device as claimed in claim 2, further including:
  • a humidity control device as claimed in claim 2, further including:
  • a humidistat mounted adjacent said support and said feed path defining means and connected to said heating means to control said heating means in response to relative humidity.

Abstract

Moisture content of receiver material is controlled within an electrophotographic apparatus by providing one or more heaters in proximity to a supply of receiver material which heaters heat the surrounding air in response to a humidistat control to keep the humidity from exceeding a predetermined level. One of the heaters is arranged to heat both the supply of receiver material and a paper feed path along which the material is fed from the supply. Thus, paper which remains in the feed path when the machine is not operating will be maintained at the correct moisture content.

Description

United StatesjPatent MacDonald, Jr.
[451 July 18,1972
[54] ENVIRONMENT CONTROL DEVICE FOR ELECTROPHOTOGRAPHI APPARATUS [72] Inventor; William A. MacDonald, Jr., Rochester, N.Y.
Eastman Kodak Company, Rochester, .N.Y.
22 Filed: Sept. 10, 1970 211 Appl.No.: 71,163
[73] Assignee:
[52] U.S. Cl. [51] Int. Cl. [58] Field of Search "95/89, 92, 94, 90; 355/3 [56] References Cited UNITED STATES PATENTS 3,349,221 10/1967 Schulze et al ..2l9/385 3,072,026 1/1963 Mackrodt ..355/l2 Primary Examiner-John M. l-loran Assistant Examiner-Kenneth C. Hutchison Attorney-Robert W. Hampton and Gary D. Fields 57] ABSTRACT Moisture content of receiver material is controlled within an electrophotographic apparatus by providing one or. more heaters in proximity to a supply of receiver material which heaters heat the surrounding air in response to a humidistat control to keep the humidity from exceeding a predetermined level. One of the heaters is arranged to heat both the supply of I receiver material and a paper feed path along which the material is fed from the supply. Thus, paper which remains in the feed path when the machine is not operating will be maintained at the correct moisture content.
4 Claim, 3 Drawing Figures Patented July 18,1972
- 2 Sheets-Sheet lv FIG. 3
WILLIAM A. MOCDONALD,JR. INVENTOR 1w BYWW. W
ATTORNEYS Patented July 18, 1972- 2 Shets-Sheet z 3 ll :11 I1 1 I 1 bl. 3w...- 8
4 x 3 I1 w A n m n 2 II! FIG. 2
WILLIAM A. MOCDONALD,JR.
INVENTOR. BY (9. 54%
ATTORNEYS ENVIRONMENT CONTROL DEVICE FOR ELECTROPIIOTOGRAPIIIC APPARATUS BACKGROUND OF THE INVENTION 1 Field of the Invention This invention relates to a humidity control device, and more particularly to a humidity control device for use in an electrophotographic apparatus.
2. Description of the Prior Art In one form of electrophotographic apparatus, an electrophotographic image is placed on a receiver material having a conductive backing and a photoconductive surface, such as a zinc oxide, upon which the image is placed. This material is I fed from a supply along a feed path to a charging station, such electrostatic charge on the photoconductive surface. Also, the
material is cut to a sheet of desired length. The charged sheet is fed to an exposure station where it is exposed to a light pattern which causes the photoconductive surface to be discharged in the exposed areas while retaining an electrostatic charge in the charged areas to form an electrostatic charge pattern. The photoconductive sheet is then fed to a developing station where toner particles of opposite charge to the electrostatic charge pattern are attracted thereto to form a toner image on the pho toconductive surface. The sheet then passes through a fusing station to cause the toner image to adhere tothe receiver sheet to form a permanent copy.
However, under high humidity conditions, the resistivity of the receiver may be decreased to a level which results in an image of reduced quality because of an increase in the relative humidity thereof. This is particularly true when the apparatus is idle for extended periods of time, such as overnight or over a weekend. In such situations, the supply of receiver material,
and especially the receiver material which remains in the feed path will be affected by the ambient humidity conditions. Thus, if the relative humidity is high, the moisture content of the receiver, both in the supply and in the feed path, may increase to an undesirably high level which adversely effects the charge-holding characteristics of the receiver.
The problem of humidity control was recognized in U.S. Pat. No. 2,885,556 to Gundlach who shows a method of increasing the moisture content of the paper but does not suggest decreasing the moisture content thereof.
In U.S. Pat. No. 3,072,026 to Mackrodt an electrophotographic device is shown which has heating elements in the feed path for zinc oxide photoconductive material to dry it out as it is fed to a charging station to thereby reduce the moisture content thereof.
A humidity-controlled storage compartment is shown in U.S. Pat. No. 3,349,221 to Schultze et al. for controlling the moisture content of a stack of cut electrophotographic receiver sheets. A heating element is provided in a hinged cover which is controlled by a humidistat to control the relative humidity within the compartment.
I SUMMARY OF THE INVENTION In accordance with the present invention, a humidity control device is provided adjacent a support for receiver material to be fed along a feed path which includes a heating means which provides a dual function of heating the supply and heating the feed path so that the moisture content of the material can be controlled both at the supply and along the feed path. The heating means can be controlled by a humidistat so that it goes on only when the relative humidity rises above a predetermined level and turns off when the relative humidity drops below a predetermined level. Optionally, a second heater can be provided on the opposite side of the supply to assure a uniform relative humidity level all around the supply. Also, thermostats can be provided for controlling of the heaters.
Additional advantages of this invention will become apparent from the description which follows, taken in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWING DESCRIPTION OF THE PREFERRED EMBODIMENT In accordance with this invention, a reader-printer R is illus- 'trated in FIG. 1 which is provided with a print module P, as
shown. The reader has means for projecting an image of an original, such as microfilm 2, onto a viewing screen 4. If a print of a particular original is needed a print button on control panel 6 may be pressed to cause the image to be projected onto a charged sheet of photosensitive material supplied from roll 8. The printer P is mounted in a drawer 10 which is movable from the open position shown in FIG. 1 to a closed position in which switch 12 is closed to cause thehumidity control device to operate as will be more fully understood from the description below.
As best seen in FIG. 2, supply roll 8 is supported on a shaft 14 extendingthrough spaced side plates 16 of printer module P. The paper is fed from the roll under a bail l8 and over a roller 20 and along a feed path defined by a pair of opposed feed rollers 22 and 24.
It has been found that in high humidity environments, the
- humidity may adversely effect the photoconductive paper'9 on the supply rolland which may tend to curl if it becomes too moist and furthermore becomes too conductive to function properly. To avoid this, a heater 26 is provided on a baffle plate 28 between the supply roll and the feed path provided by rollers 22 and 24 and is connected in series with a thermostat 30 to prevent the baffle plate from overheating. Thus, the heater 26.serves the dual function of heating supply roll 8 and also heating the feed path so that the moisture content of the paper can be maintained within predetermined limits. A second heater element 32 is provided on a baffle plate 34 mounted below supply roll 8 and connected to a thermostat 36 mounted on the baffle plate 34. A humidistat 38, shown in FIG. 2 as being mounted on back wall 40 of the reader-printer as by a bracket 42, opens the circuit to the heaters so that they no longer operate if the humidity level of the ambient air drops below some predetermined level, such as 37 percent. On the other hand, when the humidity level of the ambient air exceeds a predetermined level, say 53 percent the heaters will be energized.
A completed copy 44 from the printer module P is fed between spaced guide plates 46 and 48 for feeding the copy by means of a conveyor C to a discharge chute, of FIG. 1. Conveniently, conveyor C includes a plate 48 removably mounted on spaced pins 52 by brackets 54, as shown in FIG. 2, so that it can be removed by the operator to correct paper jams. However, when plate 48 is removed it is desired that the heater be turned off so that the operator wont burn his hands on plate 34 and for this purpose a switch 56 is provided which is illustrated as being mounted on backwall 40 by means of an angle bracket 58 and is closed by means of an ear 60 on plate 48.
The circuitry for the humidity control device is shown in FIG. 3. In addition to the elements previously described, standby switch 62 is provided which is shown as being mounted adjacent roll 8 in FIG. 1 and is controlled by the operator to turn off the humidity control device, if desired. Standby switch 62 is a double pole switch, as shown in FIG. 3, having one side connected to one side of a source of potential and the other side connected in series with door operated switch 12, chute operated switch 56, and humidistat 38. Also connected in series is a switch 64 which is opened by current through coil 66 when the print module P is in operation to discontinue operation of the heater during the print cycle. This is desirable to reduce the total power requirements of the apparatus. The opposite side of switch 64 is connected to the opposite side of the source of potential. Double pull switch 62 also is connected to opposite sides of the heaters and thermostats, as shown.
From the foregoing, the advantages of this invention are readily apparent. A humidity control device has been provided which includes heating elements to maintain relative humidity within a predetermined range so that the moisture content of the receiver is neither too high nor too low, Furthermore, one heater is advantageously positioned to serve the dual function of heating the supply of photoconductive material and heating the feed path along which the material is fed from the supply roll. This is advantageous when the apparatus has been idle for some period of time, such as overnight or over a weekend since a portion of the photoconductive sheet 9 always extends into the feed path and also must be maintained at the proper moisture content level along with the supply roll so that the first prints will be satisfactory.
The invention has been described in detail with reference to a preferred embodiment thereof, but it will be understood that variations and modifications can be effected within the spirit and scope of the invention.
I claim: 1. A humidity control device, having an enabled and disabled condition, for use in an electrophotographic apparatus used under varying relative humidity conditions for controlling the moisture content of photoconductive receiver material, said control device including:
a support for the supply of receiver material; means defining a feed path for feeding the receiver material from said support; first controllable means for simultaneously heating the supply on said support and for heating said feed path; and
means responsive to operation of said electrophotographic apparatus to disable said humidity control device during such operation.
2. A humidity control device, having an enabled and disabled condition, for use in an electrophotographic apparatus used under varying relative humidity conditions for controlling the moisture content of photoconductive receiver material, said control device including:
means for rotatably supporting a supply roll of receiver material;
means defining a feed path for feeding the photoconductive material from said supply roll;
a first baffle plate mounted between said support and said feed path defining means for heating both said supply roll and said heat path;
a first controllable heater mounted on said first baffle for heating said first baffle plate;
a first thermostat mounted on said first baffle plate and connected to said heater for controlling the temperature of said first baffle plate;
a second baffle plate spaced from said first baffle plate with said support therebetween;
a second controllable heating means mounted on said second baffle plate for heating said second baffle plate;
a second thermostat mounted on said second baffle plate and connected to said second heating means for controlling the temperature of said second baffle plate.
3. A humidity control device, as claimed in claim 2, further including:
means responsive to operation of said electrophotographic apparatus to disable said humidity control device during such operation.
4. A humidity control device, as claimed in claim 2, further including:
a humidistat mounted adjacent said support and said feed path defining means and connected to said heating means to control said heating means in response to relative humidity.

Claims (4)

1. A humidity control device, having an enabled and disabled condition, for use in an electrophotographic apparatus used under varying relative humidity conditions for controlling the moisture content of photoconductive receiver material, said control device including: a support for the supply of receiver material; means defining a feed path for feeding the receiver material from said support; first controllable means for simultaneously heating the supply on said support and for heating said feed path; and means responsive to operation of said electrophotographic apparatus to disable said humidity control device during such operation.
2. A humidity control device, having an enabled and disabled condition, for use in an electrophotographic apparatus used under varying relative humidity conditions for controlling the moisture content of photoconductive receiver material, said control device including: means for rotatably supporting a supply roll of receiver material; means defining a feed path for feeding the photoconductive material from said supply roll; a first baffle plate mounted between said support and said feed path defining means for heating both said supply roll and said heat path; a first controllable heater mounted on said first baffle for heating said first baffle plate; a first thermostat mounted on said first baffle plate and connected to said heater for controlling the temperature of said first baffle plate; a second bAffle plate spaced from said first baffle plate with said support therebetween; a second controllable heating means mounted on said second baffle plate for heating said second baffle plate; a second thermostat mounted on said second baffle plate and connected to said second heating means for controlling the temperature of said second baffle plate.
3. A humidity control device, as claimed in claim 2, further including: means responsive to operation of said electrophotographic apparatus to disable said humidity control device during such operation.
4. A humidity control device, as claimed in claim 2, further including: a humidistat mounted adjacent said support and said feed path defining means and connected to said heating means to control said heating means in response to relative humidity.
US71163A 1970-09-10 1970-09-10 Environment control device for electrophotographic apparatus Expired - Lifetime US3677632A (en)

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3767300A (en) * 1972-06-07 1973-10-23 P Brown Pollution control system for duplicator machine
US3815990A (en) * 1972-04-19 1974-06-11 Apeco Corp High speed copy machine
US3848988A (en) * 1973-06-11 1974-11-19 Xerox Corp Moisture control device
JPS513638A (en) * 1974-06-28 1976-01-13 Hitachi Ltd
US3954332A (en) * 1975-01-10 1976-05-04 Xerox Corporation Reproduction machine with improved transfer roll
US3954333A (en) * 1975-01-10 1976-05-04 Xerox Corporation Transfer roll having means for monitoring and controlling the resistivity thereof
US4027621A (en) * 1975-03-14 1977-06-07 Xerox Corporation Developing system for electrostatic reproduction machines
JPS5658665U (en) * 1980-09-29 1981-05-20
US4306802A (en) * 1980-09-15 1981-12-22 Apeco Corporation Cassette and heating arrangement for photocopy machine
US4319828A (en) * 1971-06-03 1982-03-16 Canon Kabushiki Kaisha Copying apparatus with a heated photosensitive drum
US4391502A (en) * 1977-09-12 1983-07-05 Olympus Optical Company Limited Electrophotographic apparatus having means for adjusting the reproduction properties of subsequent copies after a first copy has been produced
US4395112A (en) * 1980-09-19 1983-07-26 Mita Industrial Co., Ltd. Latent electrostatic image developing device
EP0222120A1 (en) * 1985-11-12 1987-05-20 International Business Machines Corporation Environmental sensor control device for a heated fuser in a xerographic copier
US5255023A (en) * 1992-03-03 1993-10-19 Bowlby Labs, Inc. Apparatus and method for improved paper marking
US5476152A (en) * 1991-02-07 1995-12-19 Kabushiki Kaisha Komatsu Seisakusho Steering control system by pilot pressure
US5539498A (en) * 1993-06-18 1996-07-23 Xeikon Nv Paper receptor material conditioning apparatus and method
US5828930A (en) * 1996-03-19 1998-10-27 Hitachi, Ltd. Electrostatic recording apparatus and its recording method
US20040028487A1 (en) * 2000-12-18 2004-02-12 Cardemon Richard A. Slidable boring tool with fine adjustment
US20110069987A1 (en) * 2009-09-18 2011-03-24 Seongsik Chang Hard Imaging Devices, Humidity Control Systems And Hard Imaging Methods

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3072026A (en) * 1958-03-18 1963-01-08 Messrs F Soennecken Automatic contact printers for electrostatic reproductions
US3349221A (en) * 1964-07-17 1967-10-24 Addressograph Multigraph Storage and supply enclosures for photoelectrostatic copy sheets

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3072026A (en) * 1958-03-18 1963-01-08 Messrs F Soennecken Automatic contact printers for electrostatic reproductions
US3349221A (en) * 1964-07-17 1967-10-24 Addressograph Multigraph Storage and supply enclosures for photoelectrostatic copy sheets

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4319828A (en) * 1971-06-03 1982-03-16 Canon Kabushiki Kaisha Copying apparatus with a heated photosensitive drum
US3815990A (en) * 1972-04-19 1974-06-11 Apeco Corp High speed copy machine
US3767300A (en) * 1972-06-07 1973-10-23 P Brown Pollution control system for duplicator machine
US3848988A (en) * 1973-06-11 1974-11-19 Xerox Corp Moisture control device
JPS513638A (en) * 1974-06-28 1976-01-13 Hitachi Ltd
US3954332A (en) * 1975-01-10 1976-05-04 Xerox Corporation Reproduction machine with improved transfer roll
US3954333A (en) * 1975-01-10 1976-05-04 Xerox Corporation Transfer roll having means for monitoring and controlling the resistivity thereof
US4027621A (en) * 1975-03-14 1977-06-07 Xerox Corporation Developing system for electrostatic reproduction machines
US4391502A (en) * 1977-09-12 1983-07-05 Olympus Optical Company Limited Electrophotographic apparatus having means for adjusting the reproduction properties of subsequent copies after a first copy has been produced
US4306802A (en) * 1980-09-15 1981-12-22 Apeco Corporation Cassette and heating arrangement for photocopy machine
US4395112A (en) * 1980-09-19 1983-07-26 Mita Industrial Co., Ltd. Latent electrostatic image developing device
JPS5658665U (en) * 1980-09-29 1981-05-20
EP0222120A1 (en) * 1985-11-12 1987-05-20 International Business Machines Corporation Environmental sensor control device for a heated fuser in a xerographic copier
US4672177A (en) * 1985-11-12 1987-06-09 International Business Machines Corporation Environmental sensor control of a heated fuser
US5476152A (en) * 1991-02-07 1995-12-19 Kabushiki Kaisha Komatsu Seisakusho Steering control system by pilot pressure
US5255023A (en) * 1992-03-03 1993-10-19 Bowlby Labs, Inc. Apparatus and method for improved paper marking
US5539498A (en) * 1993-06-18 1996-07-23 Xeikon Nv Paper receptor material conditioning apparatus and method
US5828930A (en) * 1996-03-19 1998-10-27 Hitachi, Ltd. Electrostatic recording apparatus and its recording method
US20040028487A1 (en) * 2000-12-18 2004-02-12 Cardemon Richard A. Slidable boring tool with fine adjustment
US20050111926A9 (en) * 2000-12-18 2005-05-26 Cardemon Richard A. Slidable boring tool with fine adjustment
US20110069987A1 (en) * 2009-09-18 2011-03-24 Seongsik Chang Hard Imaging Devices, Humidity Control Systems And Hard Imaging Methods
US8326173B2 (en) * 2009-09-18 2012-12-04 Hewlett-Packard Development Company, L.P. Hard imaging devices, humidity control systems and hard imaging methods

Also Published As

Publication number Publication date
GB1368114A (en) 1974-09-25
DE7134552U (en) 1971-12-09
FR2107395A5 (en) 1972-05-05
CA934435A (en) 1973-09-25

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