Sheet feeding apparatus and image forming system
First Claim
Patent Images
1. A sheet feeding apparatus comprising:
- a sheet tray in which a plurality of sheets are to be stacked;
a sheet feeding section which lifts a sheet upward by vacuum from the plurality of sheets stacked in the sheet tray and feeds the sheet to an image forming apparatus;
a first sheet separator which comprises,an advance resisting member movable between a separation position where the advance resistance member comes in contact with the sheet vacuumed at the sheet feeding section and separates each sheet from the plurality of sheets when the sheet feeding section feeds the plurality of sheets and a retreat position where the advance resisting member is retreated from contact with the sheet; and
a second sheet separator downstream of the first sheet separator in a conveyance path of the sheet, the second sheet separator comprises,a forward roller rotated in a sheet transport direction, which feeds the sheet to the image forming apparatus,a parallel retard roller which rotates in an opposite direction so as to separate each sheet from the plurality of sheets; and
a sheet separator controller section which controls movement of the advance resisting member between the separation position and the retreat position.
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Abstract
A sheet feeding apparatus includes: a sheet tray in which a plurality of sheets is to be stacked; a sheet feeding section which vacuums a sheet from the plurality of sheets stacked in the sheet tray and feeds the sheet to an image forming apparatus; a first sheet separator which has a member which separates each sheet from the plurality of sheets when the sheet feeding section feeds the plurality of sheets; and a second sheet separator which has a forward roller rotated in a sheet transport direction, which feeds the sheet to the image forming apparatus, and a parallel retard roller rotatable in an opposite direction so as to separate each sheet from the plurality of sheets.
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Citations
14 Claims
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1. A sheet feeding apparatus comprising:
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a sheet tray in which a plurality of sheets are to be stacked; a sheet feeding section which lifts a sheet upward by vacuum from the plurality of sheets stacked in the sheet tray and feeds the sheet to an image forming apparatus; a first sheet separator which comprises, an advance resisting member movable between a separation position where the advance resistance member comes in contact with the sheet vacuumed at the sheet feeding section and separates each sheet from the plurality of sheets when the sheet feeding section feeds the plurality of sheets and a retreat position where the advance resisting member is retreated from contact with the sheet; and a second sheet separator downstream of the first sheet separator in a conveyance path of the sheet, the second sheet separator comprises, a forward roller rotated in a sheet transport direction, which feeds the sheet to the image forming apparatus, a parallel retard roller which rotates in an opposite direction so as to separate each sheet from the plurality of sheets; and a sheet separator controller section which controls movement of the advance resisting member between the separation position and the retreat position. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A sheet feeding apparatus comprising:
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a sheet tray in which a plurality of sheets are stacked; a sheet feeding section which lifts a sheet upward by vacuum from the plurality of sheets stacked in the sheet tray and feeds the sheet to an image forming apparatus; and a sheet separating section which separates each sheet from the plurality of sheets when the sheet feeding section feeds the plurality of sheets, the sheet separating section comprising; an advance resisting member movable between a separation position where the advance resistance member comes in contact with the sheet vacuumed at the sheet feeding section and separates each sheet from the plurality of sheets when the sheet feeding section feeds the plurality of sheets and a retreat position where the advance resisting member is retreated from contact with the sheet; a forward roller rotated in a sheet transport direction, which feeds the sheet to the image forming apparatus; a parallel retard roller which rotates in an opposite direction so as to separate each sheet from the plurality of sheets; an advance resisting member controlling section which controls movement of the advance resisting member between the separation position and the retreat position a roller controlling section which controls a driving power of the parallel retard roller; and a driving power selecting section which selects whether to transmit the driving power to the parallel retard roller. - View Dependent Claims (9, 10, 11)
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12. An image forming system comprising:
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an image forming apparatus that comprises an image forming section which forms an image on a sheet; a sheet feeding apparatus which comprises, a sheet tray in which a plurality of sheets are to be stacked; a sheet feeding section which lifts a sheet upward by vacuum from the plurality of sheets stacked in the sheet tray and feeds the sheet to the image forming apparatus; a first sheet separator which comprises, an advance resisting member movable between a separation position where the advance resistance member comes in contact with the sheet vacuumed at the sheet feeding section and separates each sheet from the plurality of sheets when the sheet feeding section feeds the plurality of sheets and a retreat position where the advance resisting member is retreated from contact with the sheet; a second sheet separator downstream of the first sheet separator in a conveyance path of the sheet, the second sheet separator comprises, a forward roller rotated in a sheet transport direction, which feeds the sheet to the image forming apparatus; and a parallel retard roller which rotates in an opposite direction so as to separate each sheet from the plurality of sheets; a sheet separator controller section which controls movement of the advance resisting member between the separation position and the retreat position. - View Dependent Claims (13, 14)
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Specification