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US 2002/0008349 A1Published application
Sheet feeding method and device and image forming apparatus using the device
AssigneeRicoh Company, Ltd.
InventorKatsuhiko Miki
Life of this patent
Estimating the term…
Abstract
A method of feeding sheets includes the step of conveying the sheets between a feed roller and a separation member. The separation member is pressed against and into contact with the feed roller with a pressure applied between the feed roller and the separation member. The method also includes the steps of separating and conveying the sheets conveyed between the feed roller and the separation member one by one, and providing a cyclic change in the pressure between the feed roller and the separation member.
Claims54
A method of feeding sheets, the method comprising the steps of:
- conveying the sheets between a feed roller and a separation member, wherein said separation member is pressed against and into contact with said feed roller with a pressure applied between said feed roller and said separation member;
- separating and conveying the sheets conveyed between said feed roller and said separation member one by one;
- and
- providing a cyclic change in the pressure applied between said feed roller and said separation member.
1 more element
A sheet feeding device comprising:
- a feed roller;
- a separation member pressed against and into contact with said feed roller with a pressure applied between said feed roller and said separation member, wherein sheets conveyed into a position between said feed roller and said separation member are separated and conveyed one by one;
- and
- a pressing device configured to cyclically provide a change in the pressure applied between said feed roller and said separation member.
1 more element
A sheet feeding device comprising:
- a feed roller;
- a reverse roller pressed against and into contact with said feed roller with a pressure applied between said feed roller and said reverse roller, said reverse roller being upwardly and elastically supported by an axis, said axis being is supported at one side thereof and being rotated by a driving gear and a gear engaged with said driving gear, said reverse roller being supported at a free end side of said axis and arranged via a torque limiter, so as to be rotated in a sheet feeding direction and a direction opposite the sheet feeding direction, wherein sheets conveyed between said feed roller and said reverse roller are separated and are conveyed one by one;
- and
- a pressing device configured to provide a cyclic change in the pressure applied between said feed roller and said reverse roller, said pressing device being arranged at a side of said reverse roller.
1 more element
A sheet feeding device comprising:
- a feed roller;
- a friction roller pressed against and into contact with said feed roller with a pressure applied between said feed roller and said friction roller, said friction roller being upwardly and elastically supported by an axis, said axis being supported at one side thereof and being rotated by a driving gear and a gear engaged with said driving gear, said friction roller being arranged at a free end side of said axis via a torque limiter, so as to be rotated only in a sheet feeding direction, wherein sheets conveyed between said feed roller and said friction roller are separated and are conveyed one by one;
- and
- a pressing device configured to provide a cyclic change in the pressure applied between said feed roller and said friction roller, said pressing device being arranged at a side of said friction roller.
1 more element
An image forming apparatus comprising:
- an image forming device;
- a sheet feeding device configured to convey a sheet to said image forming device, wherein said image forming device is configured to form an image on the sheet conveyed from said sheet feeding device, and said sheet feeding device includes a feed roller and a separation member, said separation member being pressed against and into contact with said feed roller with a pressure applied between said feed roller and said separation member, wherein a plurality of the sheets conveyed between said feed roller and said separation member are separated and conveyed one by one to said image forming device;
- and
- a pressing device configured to cyclically provide a change in the pressure applied between said feed roller and said separation member.
1 more element
An image forming apparatus comprising:
- an image forming device;
- and
- a sheet feeding device configured to convey a sheet to said image forming device, wherein said image forming device being configured to form an image on the sheet conveyed from said sheet feeding device, and said sheet feeding device including a feed roller and a reverse roller, wherein said reverse roller is pressed against and into contact with said feed roller with a pressure applied between said feed roller and said reverse roller, said reverse roller being upwardly and elastically supported by an axis, said axis being supported at one side thereof and being rotated by a driving gear and a gear engaged with said driving gear, said reverse roller being supported at a free end side of said axis and arranged via a torque limiter, so as to be rotated in a sheet feeding direction and a direction opposite the sheet feeding direction, wherein a plurality of the sheets conveyed between said feed roller and said reverse roller are separated and are conveyed one by one to the image forming device;
- and
- a pressing device configured to provide a cyclic change in the pressure applied between said feed roller and said reverse roller, said pressing device being arranged at a side of the reverse roller.
2 more elements
An image forming apparatus comprising;
- an image forming device;
- and
- a sheet feeding device configured to convey a sheet to said image forming device, wherein said image forming device is configured to form an image on the sheet conveyed from said sheet feeding device, and said sheet feeding device including a feed roller and a friction roller, wherein said friction roller is pressed against and into contact with said feed roller with a pressure applied between said feed roller and said friction roller, said friction roller being upwardly and elastically supported by an axis, said axis being supported at one side thereof and being rotated by a driving gear and a gear engaged with said driving gear, said friction roller being arranged at a free end side of said axis via a torque limiter, so as to be rotated only in a sheet feeding direction, wherein a plurality of the sheets conveyed into between said feed roller and said friction roller are separated and are conveyed one by one to said image forming device;
- and
- a pressing device configured to provide a cyclic change in the pressure applied between said feed roller and said friction roller, said pressing device being arranged at a side of said friction roller.
2 more elements
A sheet feeding device comprising:
- a feed roller;
- separation means for separating sheets conveyed between said feed roller and said separation means, said separation means being pressed against and into contact with said feed roller with a pressure applied between said feed roller and said separation means;
- and
- pressing means for cyclically providing a change in the pressure applied between said feed roller and said separation means.
1 more element
A sheet feeding device comprising:
- a feed roller;
- a reverse roller pressed against and into contact with said feed roller with a pressure applied between said feed roller and said reverse roller, said reverse roller being upwardly supported by an axis, said axis being supported at one side thereof and being rotated by a driving gear and a gear engaged with said driving gear, said reverse roller being supported at a free end side of said axis and arranged via a torque limiter, so as to be rotated in a sheet feeding direction and a reverse direction, wherein sheets conveyed into a position between said feed roller and said reverse roller are separated and are conveyed one by one;
- and
- pressing means for providing a cyclic change in the pressure applied between said feed roller and said reverse roller, said pressing means being arranged at a side of said reverse roller.
1 more element
A sheet feeding device comprising:
- a feed roller;
- a friction roller pressed against and into contact with said feed roller with a pressure applied between said feed roller and said friction roller, said friction roller being upwardly and elastically supported by an axis, said axis being supported at one side thereof and being rotated by a driving gear and a gear engaged with said driving gear, said friction roller being arranged at a free end side of said axis via a torque limiter, so as to be rotated only in a sheet feeding direction, wherein sheets conveyed into a position between said feed roller and said friction roller are separated and are conveyed one by one;
- and
- pressing means for providing a cyclic change in the pressure applied between said feed roller and said friction roller, said pressing means being arranged at a side of said friction roller.
1 more element
An image forming apparatus comprising:
- image forming means for forming an image;
- and
- sheet feeding means for conveying a sheet to said image forming means, wherein said image forming means, for forming the image, forms the image on the sheet conveyed from said sheet feeding means, and said sheet feeding means includes a feed roller and a separation means, said separation means for separating an uppermost sheet from a plurality of sheets conveyed into a position between said feed roller and said separation means, said separation means being pressed against and into contact with said feed roller with a pressure applied between said feed roller and said separation means;
- and
- pressing means for cyclically providing a change in the pressure applied between said feed roller and said separation means.
2 more elements
An image forming apparatus comprising:
- image forming means for forming an image;
- sheet feeding means for conveying a sheet to said image forming means, said sheet feeding means including a feed roller and a reverse roller, said reverse roller being pressed against and into contact with said feed roller with a pressure applied between said feed roller and said reverse roller, said reverse roller being upwardly supported by an axis, said axis being supported at one side thereof and being rotated by a driving gear and a gear engaged with said driving gear, said reverse roller being supported at a free end side of said axis and arranged via a torque limiter, so as to be rotated in a sheet feeding direction and a reverse direction, wherein sheets conveyed into a position between said feed roller and said reverse roller are separated and are conveyed one by one to said image forming means;
- and
- pressing means for providing a cyclic change in the pressure applied between said feed roller and said reverse roller, said pressing means being arranged at a side of said reverse roller.
1 more element
An image forming apparatus comprising:
- image forming means for forming an image;
- sheet feeding means for conveying a sheet to said image forming means, said sheet feeding means including a feed roller and a friction roller, said friction roller being pressed against and into contact with said feed roller with a pressure applied between said feed roller and said friction roller, said friction roller being upwardly and elastically supported by an axis, said axis being supported at one side thereof and being rotated by a driving gear and a gear engaged with said driving gear, said friction roller being arranged at a free end side of said axis via a torque limiter, so as to be rotated only in a sheet feeding direction, wherein sheets conveyed into a position between said feed roller and said friction roller are separated and are conveyed one by one to said image forming means;
- and
- pressing means for providing a cyclic change in the pressure applied between said feed roller and said friction roller, said pressing means being arranged at a side of said friction roller.
1 more element
A method of forming an image on a sheet, the method comprising the steps of:
- conveying a plurality of the sheets between a feed roller and a separation member, said separation member being pressed against and into contact with said feed roller with a pressure applied between said feed roller and said separation member;
- separating and conveying the sheets conveyed between said feed roller and said separation member one by one to an image forming device;
- providing a cyclic change in the pressure applied between said feed roller and said separation member;
- and
- forming the image on one of the sheets conveyed between said feed roller and said separation member using said image forming device.
2 more elements
Dependencies are inferred from the claim text.