Sheet feeding device

{
  "publication_number": "US5280308A",
  "country": "US",
  "kind": "A",
  "title": "Sheet feeding device",
  "abstract": "This invention relates to a sheet feeding device having an endless belt for feeding a sheet; multiple rotation members bodies supporting the endless belt and including at least one crown roller, a cylindrical rotational member located between the crown roller and a first body member among the multiple rotation members from the crown roller in the endless belt moving direction.",
  "claims": [
    "1. A sheet feeding device, comprising: an endless belt which feeds a sheet in a moving direction along a feeding path; primary and secondary cylindrical members which support a portion of said endless belt on which the sheet is fed to allow movement of the portion; a crown roller around which a portion of said endless belt located offset from the feeding path is wrapped, said crown roller applying force directed from both side peripheries of said endless belt to a central portion thereof, to a surface of said endless belt; a third cylindrical rotation member disposed adjacent to said crown roller to press said endless belt onto said crown roller; recording means, provided between said primary and secondary cylindrical members, for recording an image onto the sheet fed along the feeding path by said endless belt; and cleaning means, disposed downstream of said crown roller and third cylindrical roller with respect to a moving direction of said endless belt, for cleaning said endless belt.",
    "2. A sheet feeding device according to claim 1, wherein said endless belt feeds sheets by electrostatic absorption.",
    "3. A sheet feeding device according to claim 2, wherein said endless belt has an insulation layer on the surface.",
    "4. A sheet feeding device according to claim 3, wherein said device further has a charger which electrifies the surface of the endless belt.",
    "5. A sheet feeding device according to claim 1, wherein said multiple rotation members include a cylindrical roller which contains a constant diameter in full length.",
    "6. A sheet feeding device according to claim 5, wherein said rotation members which support the portion feeding the sheet on said endless belt has a cylindrical roller.",
    "7. A sheet feeding device according to claim 1, wherein said crown roller drives said endless belt.",
    "8. An image recording device according to claim 1, wherein said recording means includes an ink jet head which discharges ink therefrom.",
    "9. A sheet feeding device comprising: an endless belt which feeds a sheet in a moving direction along a feeding path; primary and second cylindrical members which support a portion of said endless belt which feeds the sheet along the feeding path to allow movement for the portion; a crown roller to which the portion of said endless belt which is not along said feeding path is wrapped around, said crown roller applying force directed from both side peripheries of said endless belt to a central portion thereof to a surface of said endless belt; driving means which rotates said crown roller for applying a moving force to said endless belt; a third cylindrical rotation member disposed adjacent to said crown roller to press said endless belt onto said crown roller; recording means for recording an image onto the sheet fed by said endless belt; and cleaning means, disposed downstream of said crown roller and third cylindrical rotation member with respect to a moving direction of said endless belt, for cleaning said endless belt.",
    "10. A sheet feeding device according to claim 9, wherein said endless belt feeds sheet by electrostatic absorption.",
    "11. An image recording device according to claim 9, wherein said recording means includes an ink jet head which discharges ink therefrom.",
    "12. An image recording device, comprising: an endless belt which feeds a sheet in a moving direction along a feeding path; recording means which records an image onto the sheet fed along said sheet feeding path; a driving source; plural rotation members which include at least one crown roller which supports said endless belt, said crown roller being disposed so that a rotational axis thereof is orthogonal to the moving direction of said endless belt, said crown roller being rotated by said driving source to apply a moving force to said endless belt in the moving direction, said crown roller applying force directed from both side peripheries of said endless belt to a central portion thereof, to a surface of said endless belt; a cylindrical rotation member disposed adjacent to said crown roller to press said endless belt onto said crown roller; and cleaning means, disposed downstream of said crown roller and said cylindrical rotation member with respect to a moving direction of said endless belt, for cleaning said endless belt."
  ],
  "description_excerpt": "This application is a continuation of application Ser. No. 07/482,823 filed Feb. 21, 1990, now abandoned.\n\n1. Field of the Invention\n\nThe present invention is directed to a sheet feeding device, more particularly to a sheet feeding device which supplies a wide cutsheet that is greater than B5 in size on an endless belt, utilizing electrostatic absorption.\n\n2. Related Background Art\n\nLiquid injection recording devices (ink jet recording devices) which record text and images by delivering recording fluid from the recording head utilizing heat energy etc. are widely known.\n\nThese devices mainly use cutsheets such as sheets of paper or plastic as the recording sheet. This method emits low operational noise compared to other recording methods, and is superior in that its basic mechanical structures are simpler and inexpensive than other devices. This method has been employed in various fields, such as the fields of recording output devices for computers and word processors, for these reasons.\n\nPresently, due to demands for high speed recording output the line type recording head which contains a printing area that covers the entire width of the cutsheet is being developed. This method attempts to accelerate the recording process by feeding the recording paper along a fixed recording head while maintaining the paper on a belt or an equivalent method of conveyance using procedures such as electrostatic adsorption etc.",
  "cpc": [
    "G01D 15/24",
    "B41J 11/007"
  ],
  "ipc": [
    "B41J 11/00",
    "G01D 15/24"
  ],
  "assignees": [
    "Canon Inc"
  ],
  "inventors": [
    "Haruhiko Takahashi",
    "Makoto Takamiya",
    "Kosuke Yamamoto",
    "Hidejiro Kadowaki",
    "Ken Tsuchii",
    "Masafumi Wataya",
    "Toshiyuki Yanaka"
  ],
  "filing_date": "1992-03-13",
  "publication_date": "1994-01-18",
  "grant_date": "1994-01-18",
  "priority_date": "1989-02-23",
  "application_number": "US-85123992-A",
  "family_id": "27291677",
  "cited_by_count": 36,
  "citations": [
    "US589627A",
    "DE48408C",
    "US3088581A",
    "US3981391A",
    "US4200016A",
    "US4302002A",
    "US4207579A",
    "US4287984A",
    "JPS56127501A",
    "JPS57131649A",
    "JPS58109339A",
    "US4823942A",
    "US4832186A"
  ]
}