EP0598564B1 - System and method for drying ink on a printing medium - Google Patents

System and method for drying ink on a printing medium Download PDF

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Publication number
EP0598564B1
EP0598564B1 EP93309059A EP93309059A EP0598564B1 EP 0598564 B1 EP0598564 B1 EP 0598564B1 EP 93309059 A EP93309059 A EP 93309059A EP 93309059 A EP93309059 A EP 93309059A EP 0598564 B1 EP0598564 B1 EP 0598564B1
Authority
EP
European Patent Office
Prior art keywords
thermally conductive
printing medium
printer
ink
heat
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
EP93309059A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0598564A3 (enrdf_load_stackoverflow
EP0598564A2 (en
Inventor
Chuin Kiat Lim
James Loke Kie Chan
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of EP0598564A2 publication Critical patent/EP0598564A2/en
Publication of EP0598564A3 publication Critical patent/EP0598564A3/xx
Application granted granted Critical
Publication of EP0598564B1 publication Critical patent/EP0598564B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0024—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using conduction means, e.g. by using a heated platen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/02—Platens
    • B41J11/06—Flat page-size platens or smaller flat platens having a greater size than line-size platens

Definitions

  • This invention relates generally to the concept of drying ink applied to a printing medium by a printer during its printing operation, and more particularly to the drying of the ink without using the use of dedicated heaters for that purpose.
  • Prior art printer dry ink imprinted into a printing medium, usually paper, through the use of heaters. These heaters do nothing else but dry the ink.
  • U.S. 4,982,207 to Tunmore et al. refers to a platen heater system for providing heat to a print sheet during its dwell time on the platen.
  • the platen system comprises a heat foil for heat transfer between a power source and platen through a platen shell.
  • U.S. 5,046,420 to Sondergeld et al. describes a printer for tempering the operating temperature of printer elements by means including diversion of hot air generated by a printer to the elements to be tempered. It is stated that the printer avoids the potential need to heat application from an external source (col. 2, lines 19-26).
  • U.S. 3,074,332 to Robinson refers to a drying platen adapted for heat transfer relationships with a record.
  • the platen is heated by "insert heaters”.
  • U.S. 3,934,112 to Lakhani discloses a heater platen with electric heater elements for volatilizing a liquid toner carrier after imaging.
  • a printer comprising a thermally conductive platen and a heat generating module in contact with the platen. Heat generated in the heat generating module is conductively transferred to the platen, thereby heating the platen. Printed media contact with and travel across the platen and are provided with heat which causes ink on the printed media to dry.
  • This invention is directed to a system and method for drying ink on a printing medium during the printing process, and to a printer which employs such system and method.
  • the subject system has created a non-dedicated heat sink therewith in by conducting heat from a printer power supply to a thermally conductive platen for drying ink imprinted on paper in contact with the thermally conductive platen and thereby dissipating the heat from within the system.
  • the heated platen aids the ink drying process, allowing for faster printing throughput and improved print quality.
  • the introduction into the subject system of conventional dedicated heat sinks is not required again avoiding additional costs and additional space within the printer. This also allows for increased product density due to the space availability. Paper moving over the thermally conductive platen automatically helps to remove heat build up within the printer whenever it is used. The heat removal rate is automatically matched to the rate of heat generation in the system.
  • the primary generating modules comprise a power supply or a motor.
  • the thermally conductive clips preferably comprise metal clips and the thermally conductive platen is preferably made of a good metallic thermal conductor material.
  • the printer it is typically a liquid-based printer and preferably an ink jet printer.
  • the thermally conductive platen includes means for drying the ink printed on the printing medium thereby providing for faster printing throughput and improved printed quality.
  • the thermally conductive platen acts as a non-dedicated heat sink.
  • the excess heat generated is dissipated by moving the printing medium over the thermally conductive platen.
  • the excess heat is conducted away from the thermally conductive platen through the movement of a corresponding amount of the moving printing medium, the moving printing medium improving air convection cooling over the thermally conductive platen.
  • the printer it is typically a liquid-based printer, and preferably an ink jet printer.
  • the heat conductive contacts preferably comprise metal clips.
  • the thermally conductive platen includes means for drying the ink printed on the printing medium thereby providing for faster printing throughput and improved print quality.
  • the printer it is typically a liquid-based printer, preferably an ink jet printer.
  • FIG. 1 is a schematic perspective view of a system for removing excess heat from a printer for printing ink onto a printing medium.
  • FIG. 2 is a schematic side view of the system of the present invention.
  • FIG. 3 is a schematic end view of the system of the present invention.
  • FIG. 4 is an enlarged detailed view of a specific component being heat sinked by a thermally conductive platen.
  • the printer is employed for printing ink onto a printing medium.
  • the system 10 can be used in any printer. However, it is particularly useful in the GEM printer, a small portable printer manufactured by Hewlett-Packard Company.
  • the printing medium which is typically paper 12, is moved through the printer by a rotating shaft 14 driven by an electric motor 16.
  • the shaft and motor have respective intermeshing gears 18 and 20.
  • gear 18 on shaft 14 is driven by gear 20 disposed on and driven by motor 16.
  • Gear 18, and in turn shaft 14, are driven in a clockwise rotational direction by gear 20, which in turn is driven by motor 16 in a counter clockwise rotational direction.
  • the thermally conductive platen 22 is rectangular in shape and is typically constructed from a good thermal conductor, particularly a good metallic thermal conductor such as copper or the like.
  • the thermally conductive platen 22 is heated as described below, and the heated platen is used to dry the printing ink on the paper 12.
  • heat conductive metal clips 24 are attached to the underside of thermally conductive platen 22.
  • the purpose of these clips is to hold the components which are to be heat sinked by thermally conductive platen 22 in heat conductive contact therewith.
  • transistor 30, which generates excessive heat during use is held in heat conducted contact by metal clips 24 to thermally conductive platen 22 (see FIG. 4)
  • Transistor 30 is powered by a printed circuit board 26 and is electrically connected to board 26 by wires 28.
  • the primary the heat generating modules, transistor 30 and power supply 26, respectively, are conductively attached to thermally conductive platen 22 through heat conducted contacts, i.e., metal clips 24. Heat is generated within the printer whenever it needs to print. As the printer is printing and generating heat, paper 12 feeds over the thermally conductive platen 22 which also acts as a heat sink drying the printing ink. Heat is conducted away from the platen through the thermally conductive platen 22 through the moving paper 12. At the same time, the moving paper 12 facilitates convection cooling of the thermally conductive platen 22.

Landscapes

  • Ink Jet (AREA)
  • Handling Of Sheets (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
EP93309059A 1992-11-19 1993-11-12 System and method for drying ink on a printing medium Expired - Lifetime EP0598564B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US97884692A 1992-11-19 1992-11-19
US978846 1992-11-19

Publications (3)

Publication Number Publication Date
EP0598564A2 EP0598564A2 (en) 1994-05-25
EP0598564A3 EP0598564A3 (enrdf_load_stackoverflow) 1994-08-31
EP0598564B1 true EP0598564B1 (en) 1997-06-04

Family

ID=25526446

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93309059A Expired - Lifetime EP0598564B1 (en) 1992-11-19 1993-11-12 System and method for drying ink on a printing medium

Country Status (3)

Country Link
EP (1) EP0598564B1 (enrdf_load_stackoverflow)
JP (1) JPH06316067A (enrdf_load_stackoverflow)
DE (1) DE69311265T2 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6336722B1 (en) 1999-10-05 2002-01-08 Hewlett-Packard Company Conductive heating of print media
US7424781B2 (en) * 2004-01-08 2008-09-16 Eastman Kodak Company Media drying system and method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0262275A (ja) * 1988-08-30 1990-03-02 Brother Ind Ltd 記録装置
US5136329A (en) * 1989-12-21 1992-08-04 Canon Kabushiki Kaisha Image forming apparatus capable of utilizing excess heat

Also Published As

Publication number Publication date
EP0598564A3 (enrdf_load_stackoverflow) 1994-08-31
DE69311265D1 (de) 1997-07-10
DE69311265T2 (de) 1997-09-25
EP0598564A2 (en) 1994-05-25
JPH06316067A (ja) 1994-11-15

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