US3740249A - Solvent fixing process - Google Patents

Solvent fixing process Download PDF

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Publication number
US3740249A
US3740249A US00185619A US3740249DA US3740249A US 3740249 A US3740249 A US 3740249A US 00185619 A US00185619 A US 00185619A US 3740249D A US3740249D A US 3740249DA US 3740249 A US3740249 A US 3740249A
Authority
US
United States
Prior art keywords
solvent
toner images
roller
fixing
support
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
US00185619A
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English (en)
Inventor
K Takiguchi
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Application granted granted Critical
Publication of US3740249A publication Critical patent/US3740249A/en
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G11/00—Selection of substances for use as fixing agents
    • 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
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2096—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using a solvent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/138—Corona discharge process

Definitions

  • the present invention relates to a novel process of fixing a toner image onto the surface of a support and more particularly, the invention relates to a process of fixing a toner image formed loosely on a xerographic plate, an electrostatic recording paper or on a transfer sheet electrostatically by using a solvent.
  • a toner image formed on a support was fixed in electrophotography by one of the following two methods.
  • One method is the use of heat and the second method is the use of solvent.
  • the first method is unacceptable because of faults such that the power consumed in the fixing by heating is great and there is a danger of fire and the practice of the continuous heating gives harmful influences on the photoconductive layer.
  • the xing method by heating has generally been adopted more favorably than the fixing method by solvent because the solvent fixing method has many faults such that in the so-called solvent-Vapor fixing method of condensing the vapor of solvent on the surface bearing thereon a toner image, there is the necessity of a long period of time in the condensation of the solvent vapor, which makes it difficult to speed up the fixing and makes the control and maintenance of vapor difficult.
  • the solvent iiixing method has also faults, such that in the method of conducting the solvent fixing by contacting a back surface of the toner image-bearing sheet directly to a metallic roller rotated in a solvent bath with a controlled speed the whole sheet is impregnated with the solvent from the back side thereof, which requires a large quantity of solvent and the sheet is withdrawn from the fixing system in a wet state, which requires an additional drying step.
  • an object of this invention is to provide a novel process of fixing a toner image formed on a support with a solvent with a considerable reduction in consumption and release of solvent as compared with conventional solvent fixing methods.
  • the term support means a photosensitive paper or a web sheet of electrostatic recording paper each having a toner image thereon or a web sheet to which a toner image formed on a photosensitive plate has been transferred.
  • FIG. l is a cross-sectional view showing the typical mechanism of the process of this invention.
  • FIG. 2 is a cross-sectional view showing a modification of the process of this invention.
  • a conductive roller 1 which has been grounded, is rotated by means of a motor (not shown).
  • a s01- vent 2 placed in a solvent tank 3i is a solvent capable of directly fusing a toner image, a solvent containing a binder, or a solvent containing a plasticizer. That is to say, a liquid used in a conventional fixing method of toner images by solvent, may be used in this invention.
  • the solvent is restricted in electric conductivity to some extent by the reasons shown below.
  • a roller 4 is immersed partially in the solvent and supplies the solvent onto a roller 5 in an amount controlled by a control blade 6.
  • the roller S transfers the solvent thus supplied onto the surface of the conductive roller 1 to form a thin film of the solvent on the conductive roller 1.
  • Adjacent to the roller 1 is disposed a cleaner 7 for cleaning away the toner offset on the roller 1.
  • a support having formed thereon toner image 9, is supplied to the solvent fixing system and withdrawn therefrom with fixed toner images 10 by solvent.
  • Under the roller 1 is disposed a corona discharging device 11.
  • a solvent is supplied from the solvent tank 3 in a suitably controlled amount and the film of the solvent is formed on the surface of the roller 1.
  • the conductive roller 1 is contacted with the surface of the sheet 8 bearing the toner images via corona discharging.
  • the polarity of the corona discharging is so selected that it is opposite to the charge of the toner images 9 formed electrophotographically on the support.
  • the sheet 8 is closely brought into contact with the solvent film on the conductive roller 1 to provide uniform fixing and additionally, because the polarity of the corona discharging is opposite to the charge of the toner image, the toner images are attracted strongly t0 the support by the electrostatic attraction forces to reduce the offset of the toner onto the roller 1 and also thereby reduces the disturbance of the toner images by solvent.
  • the evaporation of the solvent at the stoppage of the above fixing system is prevented by stopping the rotation of the roller 4 and closing the solvent tank 3.
  • FIG. 2 Another embodiment of this invention is shown in FIG. 2.
  • the solvent is supplied to the conductive roller 12 by means of :a solvent supplying material 20, such as felt in place of the roller 5 in FIG. 1. That is to say, the solvent supplied to the solvent supply material 20 by means of a rotary roller 15 from a solvent tank, is carried onto the conductive roller 12 by a capillary phenomena to form a thin film of the solvent on the surface of the conductive roller 12.
  • a load 21 is used for forming a uniform ilm on the roller. Also, the load acts as a cleaner for the conductive roller 12 together with the solvent supply member.
  • the fixing of the toner images 17 on the support 16 is conducted by the same manner as mentioned in relation with the embodiment shown in FIG. 1. 13 is, of course, the solvent in the solvent tank 14, 18 is the xed toner image, and 19 is the corona discharging device.
  • the solvent used in this invention must not have a property of losing the charge of the toner images. Accordingly, a liquid having a high electric conductivity or having a polarity cannot be used.
  • liquids usually use'd as dispersing mediums for liquid developers in electrophotography are desirably used.
  • EXAMPLE l The fixing system shown in FIG. l was used.
  • the conductive roller 1 an aluminum roller having a diameter of 38 mm. was used.
  • the diameter of the roller 4 was 28 mm., and the diameter of the roller was 18 mm.
  • the solvent used was l,l,1trichloroethane.
  • a Wire of 0.1 mm., in diameter was placed as an experimental corona discharging device with a distance of 14 mm. from the surface of the roller 1 and an electric potential of 6 kv. was applied to the wire.
  • rollers, 1, 4 and 5 were rotated in the direction of the arrow at a line speed of 70 mur/sec. and when a paper sheet having unxed toner images formed by toners charged negatively was passed through the ⁇ fixing system, good ixed toner images were obtained.
  • the paper sheet having the iiXed toner images was also obtained in an almost dry state ⁇ and no offset of toner was observed on the roller.
  • EXAMPLE 2 The iixing system as shown in FIG. 2 was used.
  • As the conductor roller 12 an aluminum roller having a diamter of .38 mm. was used and the diameter of the roller 15 was 2l mm. Also, a felt of 4 mm. in thickness was used as the ysolvent supply material 20.
  • a good fixing was obtained.
  • the line speed of the roller 1 was 70 mm./ sec.
  • a process for fixing toner images with a solvent which comprises contacting a ilm of a solvent formed on the surface of a grounded conductive roller with the front ysurface of a support having thereon toner images while applying to the back side of the support a corona discharge of a polarity opposite to the charge of the toner images to thereby fix the toner images on the support, said solvent being capable of iixing said toner images and being a non-conductive and non-polar liquid.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)
US00185619A 1970-10-01 1971-10-01 Solvent fixing process Expired - Lifetime US3740249A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45086240A JPS4926591B1 (enrdf_load_stackoverflow) 1970-10-01 1970-10-01

Publications (1)

Publication Number Publication Date
US3740249A true US3740249A (en) 1973-06-19

Family

ID=13881264

Family Applications (1)

Application Number Title Priority Date Filing Date
US00185619A Expired - Lifetime US3740249A (en) 1970-10-01 1971-10-01 Solvent fixing process

Country Status (5)

Country Link
US (1) US3740249A (enrdf_load_stackoverflow)
JP (1) JPS4926591B1 (enrdf_load_stackoverflow)
DE (1) DE2149216A1 (enrdf_load_stackoverflow)
GB (1) GB1346917A (enrdf_load_stackoverflow)
NL (1) NL7113507A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4935785A (en) * 1988-12-05 1990-06-19 Xerox Corporation Electrophotographic fuser roll and fusing process
US5476739A (en) * 1993-06-28 1995-12-19 Minolta Camera Kabushiki Kaisha Fixing solution containing monoester of bivalent organic acid and fixing method of toner images therewith
US20070098469A1 (en) * 2005-10-27 2007-05-03 Mie Yoshino Fixing apparatus for nonheat fixing system, and image forming apparatus having fixing apparatus
EP2009515A3 (en) * 2007-06-29 2012-09-19 Ricoh Company, Ltd. Fixing device and image forming method and image forming apparatus using the same

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53145887U (enrdf_load_stackoverflow) * 1977-04-21 1978-11-16
JPS61146763U (enrdf_load_stackoverflow) * 1985-03-05 1986-09-10
EP0221451B1 (en) * 1985-10-24 1992-01-22 Stork Colorproofing B.V. Method of image fixing in colour electrostatography
JPS63198863A (ja) * 1987-02-13 1988-08-17 Nippon Steel Corp 渦流探傷装置
JPS6478623A (en) * 1987-09-21 1989-03-24 Sumitomo Metal Ind Cooling method for hot welded steel pipe
CN2515702Y (zh) * 2001-12-30 2002-10-09 黄秀臣 一种激光打印文稿加黑机

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4935785A (en) * 1988-12-05 1990-06-19 Xerox Corporation Electrophotographic fuser roll and fusing process
US5476739A (en) * 1993-06-28 1995-12-19 Minolta Camera Kabushiki Kaisha Fixing solution containing monoester of bivalent organic acid and fixing method of toner images therewith
US20070098469A1 (en) * 2005-10-27 2007-05-03 Mie Yoshino Fixing apparatus for nonheat fixing system, and image forming apparatus having fixing apparatus
EP2009515A3 (en) * 2007-06-29 2012-09-19 Ricoh Company, Ltd. Fixing device and image forming method and image forming apparatus using the same

Also Published As

Publication number Publication date
DE2149216A1 (de) 1972-04-20
NL7113507A (enrdf_load_stackoverflow) 1972-04-05
JPS4926591B1 (enrdf_load_stackoverflow) 1974-07-10
GB1346917A (en) 1974-02-13

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