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US 5,606,357 AGranted
Sheet conveying means and an ink jet recording apparatus having the same
AssigneeCanon Kabushiki Kaisha
InventorToshihiko Bekki
Life of this patent
Estimating the term…
Abstract
A sheet conveying device for conveying a sheet includes a rotatable member, a spur provide in opposed relationship with the rotatable member, and a resilient member supporting the spur and provided in a curved state so as to press the spur against the rotatable member. The resilient member is in the form of a closely wound tension coil spring.
Claims94
Sheet conveying means for conveying a sheet, said sheet conveying means comprising:
- a spur for guiding the sheet, said spur being provided opposed to a rotatable member for conveying the sheet;
- and
- a closely wound tension coil spring arcuately provided to support said spur and press said spur to the rotatable member, said closely wound tension coil spring having a first portion, one end of which is movably supported, a second portion, one end of which is movably supported, and an intermediate portion provided between said first and second portions, said first, second and intermediate portions being continuously formed, wherein the closely wound tension coil spring is capable of changing an initial tension by varying a twisting degree applied when a coil is closely wound.
An apparatus for effecting recording on a sheet, said apparatus comprising:
- sheet conveying means for conveying the sheet, said conveying means including a spur for guiding the sheet, said spur being provided opposed to a rotatable member for conveying the sheet, and a closely wound tension coil spring arcuately provided to support said spur and press said spur to the rotatable member, said closely wound tension coil spring having a first portion, one end of which is movably supported, a second portion, one end of which is movably supported, and an intermediate portion provided between said first and second portions, said first, second and intermediate portions being continuously formed;
- and
- a conveyance system for defining a conveyance route for conveying the sheet to said sheet conveying means, wherein the closely wound tension coil spring is capable of changing an initial tension by varying a twisting degree applied when a coil is closely wound.
An ink jet recording apparatus comprising:
- conveying means for conveying a recording medium, said conveying means comprising a spur for guiding the recording medium, said spur being provided opposed to a conveying roller for conveying the recording medium, and a closely wound tension coil spring arcuately provided to support said spur and press said spur to the conveying roller, said closely wound tension coil spring having a first portion, one end of which is movably supported, a second portion, one end of which is movably supported, and an intermediate portion provided between said first and second portions, said first, second and intermediate portions being continuously formed;
- and
- a support member for supporting an ink jet recording head having a discharge port for discharging ink onto the recording medium, wherein the closely wound tension coil spring is capable of changing an initial tension by varying a twisting degree applied when a coil is closely wound.
Sheet conveying means for conveying a sheet, said sheet conveying means comprising:
- a first rotatable member for guiding the sheet, said first rotatable member being provided opposed to a second rotatable member for conveying the sheet;
- and
- a closely wound coil spring for supporting said first rotatable member and bending to press said first rotatable member to the second rotatable member when guiding the sheet, said closely wound coil spring having a first portion, one side end of which is movably supported, a second portion, another side end of which is movably supported, and an intermediate portion provided between said first and second portions, said first, second and intermediate portions being continuously formed, wherein the closely wound coil spring is capable of changing an initial tension by varying a twisting degree applied when a coil is closely wound.
An apparatus for effecting recording on a sheet, said apparatus comprising:
- sheet conveying means for conveying the sheet, said conveying means including a first rotatable member for guiding the sheet, said first rotatable member being provided opposed to a second rotatable member for conveying the sheet, and a closely wound coil spring for supporting said first rotatable member and bending to press said first rotatable member to the second rotatable member when guiding the sheet, said closely wound coil spring having a first portion, one side end of which is movably supported, a second portion, another side end of which is movably supported, and an intermediate portion provided between said first and second portions, said first, second and intermediate portions being continuously formed;
- and
- a conveyance system for defining a conveyance route for conveying the sheet to said sheet conveying means, wherein the closely wound coil spring is capable of changing an initial tension by varying a twisting degree applied when a coil is closely wound.
An ink jet recording apparatus comprising:
- conveying means for conveying a recording medium, said conveying means comprising a first rotatable member for guiding the recording medium, said first rotatable member being provided opposed to a second rotatable member for conveying the recording medium, and a closely wound coil spring for supporting said first rotatable member and bending to press said first rotatable member to the second rotatable member when guiding the sheet, said closely wound coil spring having a first portion, one side end of which is movably supported, a second portion, another side end of which is movably supported, and an intermediate portion provided between said first and second portions, said first, second and intermediate portions being continuously formed;
- and
- a support member for supporting an ink jet recording head having a discharge port for discharging ink onto the recording medium, wherein the closely wound coil spring is capable of changing an initial tension by varying a twisting degree applied when a coil is closely wound.
A sheet guiding device comprising:
- a rotatable member provided contactably with a sheet to guide the sheet;
- an elastic shaft member for supporting said rotatable member;
- and
- a support member for supporting both ends of said elastic shaft member,
- wherein said elastic shaft member is supported by said support member at a peripheral surface of said elastic shaft member and comprises a closely wound coil spring for bending when guiding the sheet to press said rotatable member to the sheet, wherein the closely wound coil spring is capable of changing an initial tension by varying a twisting degree applied when a coil is closely wound.
2 more elements
A recording apparatus for recording on a sheet, said apparatus comprising:
- a sheet guiding device having a rotatable member provided contactably with the sheet to guide the sheet, an elastic shaft member for supporting said rotatable member, and a support member for supporting both ends of said elastic shaft member, wherein said elastic shaft member is supported by said support member at a peripheral surface of said elastic shaft member and comprises a closely wound coil spring for bending when guiding the sheet to press said rotatable member to the sheet;
- and
- a conveyance device for defining a conveyance route for conveying the sheet to said sheet guiding device, wherein the closely wound coil spring is capable of changing an initial tension by varying a twisting degree applied when a coil is closely wound.
An ink jet recording apparatus comprising:
- a sheet guiding device having a rotatable member provided contactably with a sheet to guide the sheet, an elastic shaft member for supporting said rotatable member, and a support member for supporting both ends of said elastic shaft member, wherein said elastic shaft member is supported by said support member at a peripheral surface of said elastic shaft member and comprises a closely wound coil spring for bending when guiding the sheet to press said rotatable member to the sheet;
- and
- a mounting member for mounting an ink jet recording head having a discharge port for discharging ink onto the sheet, wherein the closely wound coil spring is capable of changing an initial tension by varying a twisting degree applied when a coil is closely wound.
Dependencies are inferred from the claim text.