US3908594A - Marking apparatus - Google Patents

Marking apparatus Download PDF

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Publication number
US3908594A
US3908594A US346292A US34629273A US3908594A US 3908594 A US3908594 A US 3908594A US 346292 A US346292 A US 346292A US 34629273 A US34629273 A US 34629273A US 3908594 A US3908594 A US 3908594A
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US
United States
Prior art keywords
layer
roller
developer
improvement
sponge
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
US346292A
Other languages
English (en)
Inventor
Seiji Matsumoto
Satoru Honjo
Kazuhiro Kawaziri
Sigeru Tezuka
Etuo Shiozawa
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
Priority claimed from JP7233971A external-priority patent/JPS5111267B1/ja
Priority claimed from JP3337172A external-priority patent/JPS48100800A/ja
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Application granted granted Critical
Publication of US3908594A publication Critical patent/US3908594A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03G15/06—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
    • G03G15/101—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer for wetting the recording material

Definitions

  • a marking apparatus for a material to be marked with an electrophotosensitive layer comprises means for feeding the material, a developing roller having a resilient. nonconductive surface layer, said roller being so mounted as to contact only with the material, and a suction means for sucking an excessive developer after developing with a time interval necessary for acccomplishing developing operation.
  • FIG. IA is a diagrammatic representation of FIG. IA
  • An object of the invention is to provide an apparatus for forming marked lines on a surface of material to be marked by coating an electrophotographic light sensitive layer thereon and forming an information such as marked lines with an electrophotographic process.
  • FIG. 1 is a schematic side elevation of one embodiment of the invention where FIG. 1A illustrates a charging step, FIG. 18 illustrates an image exposure step, and FIG. 1C illustrates a developing and cleaning step in accordance with the invention and FIGS. 2 to 8 are schematic side elevations of the essential parts of embodiments in accordance with the invention respectively.
  • FIG. 1A, 1B and 1C represent devices performing the inventive processes in which FIG. 1A is a charging process, FIG. 18 an exposure process and FIG. 1C a developing process.
  • numeral 3 represents a material to be marked made of, for example, a steel plate and a light sensitive layer 2 (the layer is made of photoconductive powder material such as zinc oxide or titanium oxide mixed with a resin having high insulating property such as silicon acrylic resin or alkyd resin and is applied on the surface about from 5 to 30a in thickness).
  • Numeral 4 is a corona discharge electrode of which size is about from 30 to 100 in diameter.
  • the .plate like material 3 to be marked is fed with a conveyor 7 in the direction shown by an arrow and the material is charged with the electrode 4 during passing under the electrode.
  • an original 5 having an original draft, such as marking lines thereon is superposed on the light sensitive layer 2, exposing them to a suitable light source 6, thus forming an electrostatic latent image in the light sensitive layer 2.
  • the material to be marked having the latent image is fed to the developing station shown in FIG. 1C.
  • a developing roller 8 having a resilient, porous and electrically insulating surface in-which liquid developer being infiltrated is driven on the surface having the latent image under a suitable pressure to develop the image.
  • the roller 8 is so constructed that has a core made of metal, vinyl chloride or acrylic resin and a urethane foam band 0.5 to 10 cm in thickness wound thereon.
  • a liquid developer Kerosene, lsopar E, H or G (isoparafil solvent) or cyclohexane or the like in which carbon black, phthalocyanine blue, as a pigment,
  • FIG. 2 an embodiment of an apparatus for applying developer onto the light sensitive layer 2 is shown.
  • the roller 8 is, as set forth above, formed with a core made of metal or vinyl chloride or acrylic resin and a surface layer made of polyurethane foam, polyethylene foam or rubber foam which is resilient, porous and having a high insulating property.
  • the material 3 to be marked fed with the conveyor 7 passes through under the roller 8 to receive the developer by squeezing thereof due to compression of the roller onto the material surface. According to be advance of the material and the rotation of the roller 8, the excess developer supplied on the material surface can be absorbed into the roller again upon leaving from the material surface, so that a suitable amount of developer may be applied on the surface.
  • the thickness of the material to be marked is more than a radially compressed distance of the resilient portion of the roller for assuring proper supply of liquid developer.
  • a material to be marked having a thickness of more than 3 mm makes it. possible to proper developer supply only in the necessary area for marking without any excess supply into the unnecessary area.
  • a thickness of material to be marked is less than 3 mm, a plate member having about the same size with the material is positioned on the conveyor and the material is superposed on the plate member to make the total thickness of them more than 3 mm.
  • numeral 21 represents an arm on which the roller 8 being rotatably mounted at its one end and the arm is also swingably mounted by means of a pin 22 at its other end.
  • the roller When lacking in developer, the roller may be rotated to a position shown by numeral 8'.
  • Numeral 23 is a nozzle for supplying developer to the roller and during supplying developer the roller rotates in the direction shown by an arrow.
  • Numeral 24 is a squeezing roller for removing'an excessive developer. The excessive developer will be collected in a reservoir R through a tray 25. The developer withdrown into the reservoir R will be fed to the nozzle 23 by means of a pump P.
  • roller 8 After developer supplying operation has finished the roller 8 will be returned to its operating position from said developer supply position. During the roller is in the supply position, the conveyor 7 is stopped.
  • FIG. 3 shows a schematic elevational view of another embodiment in accordance with the invention in which a plate like material to be marked is fed in constant speed in the direction shown by an arrow.
  • a light sensitive layer 2 has a latent image therein formed during passing through a charge and an exposure process.
  • a developing roller 8 having a resilient, porous surface layer rotates around a shaft thereof. During passing the material 3 under the roller 8 having a developer therein with a suitable compression of the resilient surface layer of the roller, the developer in the roller 8 is applied onto the light sensitive layer 2 of the material.
  • the surface of the roller 8 Since the surface of the roller 8 has sufficient resiliency, it completely compensates for a slight roughness due to a roughness of the material surface and minimizes irregularity of developer supply. If the material to be marked has a thickness of more than 3 mm, the outer porous surface layer of the roller is not compressed when it never contacts with any other ones than the material and thus useless comsumption of developer does not occur.
  • Numeral 31 represents a developer supply nozzle
  • numeral 32 is a squeezing roller for retaining a proper amount of developer in the roller layer.
  • Numeral 34 is a doctor blade for preventing an excess developer from adhering to the roller again.
  • the squeezing roller may be driven with a motor (not shown) or the roller 8.
  • An amount of developer about from 0.1 to 0.8 c.c./cm in the roller layer is preferable, a less developer causes insuficient development and an excessive one stains the surface of the marked surface.
  • a preferable amount of a developer to be supplied from the roller is determined in accordance with an amount of toner included in the developer and when an amount of the developer having toner X g/l in the range of to 500 c.c./m a preferable amount of the developer to be supplied onto the photosensitive surface can be indicated by the following expression:
  • a preferable amount of developer when including 4 g/l toner weight, is about from to 250 c.c./m developer of about from to 500 c.c./m when including 2 g/l of toner, developer about from 40 to 500 c.c./m when including 1 g/l of toner, developer about from 5 to 125 c.c./m when including 8 g/l of toner and developer about from 5 to 100 c.c./m when including 16 g/l toner.
  • a blurred image may be obtained with too less developer and an excess developer stains a light sensitive surface and is wasteful.
  • porous member of the roller has sufficient resiliency, it compensates for a slight unevenness of a light sensitive surface of a material due, for example, to a roughness of the surface of the material, for inaccuracy of a conveyor and the like. According to our experiments, porous member having bubles of which di ameters are in the range of from 50 to 900a could retain the optimum amount of developer and a roller of which diameter was of about from to 400 mm was the most proper for use.
  • a developer contained in a roller tends to drop out therefrom due to the existence of gravity when stopping the roller, and if not drop out the developer is apt to collect in the under space of the roller.
  • it is de sirable to rotate the roller continuously not only during supplying the developer to the material but also during idling. It is preferable to rotate the roller more than 10 rpm. during there is no contact of the roller with a material.
  • FIG. 4 represents an embodiment of a suction roller which sucks a developer already used after the developer has been applied to a material to be marked. After a developer has been applied to a photosensitive layer on a material to be marked and a latent image has been developed, the material is fed to a position where a suction roller is mounted about 5 to 200 cm from the developing roller. Used developer is removed from the material by the suction roller.
  • the suction roller 9 has a core made of metal, plastic or others and a resilient, porous and a high oil absorbing layer made of, for example, polyethylene foam layer mounted around the core. Bubbles contained in the suction roller having substantially similar to or slightly less than that of the developing roller in sizes, namely about 30 to 700g in diameter can preferably be used. Such suction roller will remove used developer promptly and sufficiently.
  • the diameter of the suction roller of about 2.5 to 40 cm is optimum.
  • Numeral 41 is a suction nozzle which removes the developer already sucked developer to the roller.
  • the sip slit of the nozzle about 2 to 20 mm in width and a pressure of from 400 to 1000 mm water head in a suction pump P are preferable.
  • the position at which the suction roller is to be positioned is about 5 to 200 cm far from the developing position when the conveyor velocity is 10 cm/sec.
  • FIG. 5 represents another embodiment of a suction roller device. Used developer can be absorbed into a porous layer of a suction roller 9 through a nozzle 51 and then sucked with a suction pump P.
  • Numeral 52 is a rotatable roller mounted at the slit of the nozzle 51 for squeezing the developer in the roller 9. This rotatable roller 52 not only sucks the developer in the roller 9 effectively but also prevents wear of the porous layer of the roller 9.
  • FIG. 6 represents further embodiment of a suction roller device.
  • a hollow tube like casing 62 having 212'. axially formed opening has an inner tube 6i having a plurality of small holes and the exposed portion of the inner tube is forcibly in contact with the porous surface of the suction roller 9 for sucking used developer through the opening as shown in the figure.
  • the central hollow portion inside the tube 61 is maintained a negative pressure with a suction pump (not shown), so that used developer can be sucked into the hollow portion.
  • the numeral 62 is the casing for preventing entrainment of air from the holes which are not in contact with the suction roller 9.
  • Numeral 63 is a trough for collecting sucked developer.
  • FIG. 7 represents a device for use in a drying process.
  • Numeral 71 is an air nozzle positioned above the light sensitive surface being fed by a conveyor 7 about 2 to 30 mm and effects squeezing and drying the remained developer.
  • An excessively high air velocity tends to damage an image formed on the material to be marked and a too less velocity causes less effect.
  • a velocity of the air flow in the range of from 0.5 to m/sec and a direction of the air flow in the angular range of from 45 to 90 to the surface of the material to be marked is preferable.
  • FIG. 8 represents another embodiment of a drying process.
  • a suction roller 9 is in the proximity of an air nozzle 81 for increasing suction effect of the roller.
  • the suction roller has a porous and resilient surface layer and the surface is in contact with a light sensitive layer 2.
  • sucked developer into the roller is then sucked into a nozzle 41 and residual returns to the roller 9 due to an air flow from the nozzle 81 and sucked into the roller 9. It is of course that the air flow ejected from the nozzle 81 enaporate a part of residual.
  • the distance between the line that the contact line of the suction nozzle 9 with the surface of the material to be marked and the line that the air flow ejected from the nozzle 81 runs against the surface of the material is preferably about from 3 to 50 mm.
  • the angle between the air fiow ejecting direction and the. material surface direction is preferably decided in the range of 45 to 90.
  • the marking operation on an electroconductive material being more than 3 mm in thickness can effectively be carried out.
  • a high contrast marked line image can be obtained with minimum developer loss on materials to be marked of various dimensions and further a photosensitive layer is upwardly directed, so that no troubles in mechanical system, especially in exposure system, are encountered.
  • suction means comprises a suction roller having a core and a resilient, porous layer mounted thereon, which is pressed against the material to be marked.
  • suction means includes a suction nozzle to absorb the developer contained in the suction roller layer, said nozzle being pressed against the surface of the porous layer.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Wet Developing In Electrophotography (AREA)
US346292A 1972-04-06 1973-03-30 Marking apparatus Expired - Lifetime US3908594A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7233971A JPS5111267B1 (fr) 1971-04-06 1972-04-06
JP3337172A JPS48100800A (fr) 1972-04-06 1972-04-06

Publications (1)

Publication Number Publication Date
US3908594A true US3908594A (en) 1975-09-30

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US (1) US3908594A (fr)
FR (1) FR2179052B1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4045165A (en) * 1974-10-19 1977-08-30 Mita Industrial Co., Ltd. Contact heat fixing device
FR2399050A1 (fr) * 1977-07-26 1979-02-23 Canon Kk Procede et appareil de formation d'images par un processus electrostatique
EP0901050A2 (fr) * 1997-09-08 1999-03-10 Xerox Corporation Dispositif absorbant à dépression pour conditionner une image développée par un liquide

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3363530A (en) * 1965-06-07 1968-01-16 Eastman Kodak Co Apparatus for processing film by means of a porous web solution applicator
US3369523A (en) * 1965-08-11 1968-02-20 Azoplate Corp Apparatus for developing latent electrostatic images
US3410713A (en) * 1963-08-06 1968-11-12 Henkel & Compagnie G M B H Process and apparatus for application of adhesive
US3461843A (en) * 1967-11-21 1969-08-19 Stanford Research Inst Toner application apparatus
US3552353A (en) * 1966-12-05 1971-01-05 Raymond A Labombarde Apparatus for applying high viscosity coatings
US3701337A (en) * 1969-12-29 1972-10-31 Honeywell Inc Printing apparatus
US3741643A (en) * 1971-11-19 1973-06-26 Savin Business Machines Corp Pneumatic assembly for removing excess developer liquid from photoconductive surfaces
US3741157A (en) * 1969-12-29 1973-06-26 Ibm Electrophotographic plate cleaning apparatus
US3830199A (en) * 1971-03-24 1974-08-20 Ricoh Kk Device for developing an electrostatic image with a developing fluid

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1099813A (en) * 1964-11-04 1968-01-17 Clevite Corp Apparatus for developing electrostatic images with liquid toner
GB1214149A (en) * 1966-12-24 1970-12-02 Canon Camera Co Electrostatic copying process

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410713A (en) * 1963-08-06 1968-11-12 Henkel & Compagnie G M B H Process and apparatus for application of adhesive
US3363530A (en) * 1965-06-07 1968-01-16 Eastman Kodak Co Apparatus for processing film by means of a porous web solution applicator
US3369523A (en) * 1965-08-11 1968-02-20 Azoplate Corp Apparatus for developing latent electrostatic images
US3552353A (en) * 1966-12-05 1971-01-05 Raymond A Labombarde Apparatus for applying high viscosity coatings
US3461843A (en) * 1967-11-21 1969-08-19 Stanford Research Inst Toner application apparatus
US3701337A (en) * 1969-12-29 1972-10-31 Honeywell Inc Printing apparatus
US3741157A (en) * 1969-12-29 1973-06-26 Ibm Electrophotographic plate cleaning apparatus
US3830199A (en) * 1971-03-24 1974-08-20 Ricoh Kk Device for developing an electrostatic image with a developing fluid
US3741643A (en) * 1971-11-19 1973-06-26 Savin Business Machines Corp Pneumatic assembly for removing excess developer liquid from photoconductive surfaces

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4045165A (en) * 1974-10-19 1977-08-30 Mita Industrial Co., Ltd. Contact heat fixing device
FR2399050A1 (fr) * 1977-07-26 1979-02-23 Canon Kk Procede et appareil de formation d'images par un processus electrostatique
US4299902A (en) * 1977-07-26 1981-11-10 Canon Kabushiki Kaisha Image forming process and apparatus therefor
EP0901050A2 (fr) * 1997-09-08 1999-03-10 Xerox Corporation Dispositif absorbant à dépression pour conditionner une image développée par un liquide
EP0901050A3 (fr) * 1997-09-08 1999-09-08 Xerox Corporation Dispositif absorbant à dépression pour conditionner une image développée par un liquide

Also Published As

Publication number Publication date
FR2179052B1 (fr) 1976-05-21
FR2179052A1 (fr) 1973-11-16

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