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US 7,515,865 B2Granted
Recording medium feeding device and image forming apparatus
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsRyoichi Matsushima, Makoto Hattori
Life of this patent
Estimating the term…
Abstract
A recording medium feeding device includes: a delivery roller provided so as to abut on a surface of recording media and for delivering the recording media to a downstream side in a direction of conveyance of the recording media in accordance with the rotation of the delivery roller; a separation member provided on the downstream side with respect of the delivery roller; and a feed roller provided opposite to the separation member to sandwich the recording media delivered by the delivery roller with the separation member, the feed roller rotating for separating and conveying the recording media one by one, wherein a diameter of the feed roller is larger than a diameter of the delivery roller.
Claims24
A recording medium feeding device comprising:
- a delivery roller provided so as to abut on a surface of recording medium and for delivering the recording medium to a downstream side in a direction of conveyance of the recording medium in accordance with the rotation of the delivery roller;
- a separation member provided on the downstream side with respect of the delivery roller;
- a feed roller provided opposite to the separation member to sandwich the recording medium delivered by the delivery roller with the separation member, the feed roller rotating for separating and conveying the recording medium one by one;
- and
- a pair of registration rollers provided on the downstream side with respect to the feed roller, the registration rollers rotating for conveying the recording medium,
- wherein a diameter of the feed roller is larger than a diameter of the delivery roller,
- wherein the recording medium delivered by the delivery roller is conveyed so as to be turned back like a U figure along a circumferential surface of the feed roller, a conveyance path for conveying the recording medium after turning back like the U figure is inclined toward a side where a recording medium storage portion is provided,
- wherein both the delivery roller and the feed roller are provided as a non-circular roller having a large diameter portion, and a small diameter portion that has a diameter smaller than that of the large diameter portion in terms of a sectional shape perpendicular to a rotation axis of the non-circular roller, and
- wherein the diameter of the feed roller is equal to an integral multiple of the diameter of the delivery roller.
6 more elements
An image forming apparatus comprising:
- a delivery roller provided so as to abut on a surface of recording medium and for delivering the recording medium to a downstream side in a direction of conveyance of the recording medium in accordance with the rotation of the delivery roller;
- a separation member provided on the downstream side with respect of the delivery roller;
- a feed roller provided opposite to the separation member to sandwich the recording medium delivered by the delivery roller with the separation member, the feed roller rotating for separating and conveying the recording medium one by one;
- an image forming section that forms an image on the recording medium conveyed by the feed roller;
- and
- a pair of registration rollers provided on the downstream side with respect to the feed roller, the registration rollers rotating for conveying the recording medium,
- wherein a diameter of the feed roller is larger than a diameter of the delivery roller,
- wherein the recording medium delivered by the delivery roller is conveyed so as to be turned back like a U figure along a circumferential surface of the feed roller, a conveyance path for conveying the recording medium after turning back like the U figure is inclined toward a side where a recording medium storage portion is provided,
- wherein the delivery roller and the feed roller are each provided as non-circular rollers, the delivery roller and the feed roller each having a large diameter portion and a small diameter portion that has a diameter smaller than that of the large diameter portion, in terms of a sectional shape perpendicular to a rotation axis of the non-circular rollers, and
- wherein the diameter of the feed roller is equal to an integral multiple of the diameter of the delivery roller.
7 more elements
A recording medium feeding device comprising:
- a delivery roller provided so as to abut on a surface of recording medium and for delivering the recording medium to a downstream side in a direction of conveyance of the recording medium in accordance with the rotation of the delivery roller;
- a separation member provided on the downstream side with respect of the delivery roller;
- a feed roller provided opposite to the separation member to sandwich the recording medium delivered by the delivery roller with the separation member, the feed roller rotating for separating and conveying the recording medium one by one;
- and
- a pair of registration rollers provided on the downstream side with respect to the feed roller, the registration rollers rotating for conveying the recording medium;
- wherein a diameter of the feed roller is larger than a diameter of the delivery roller,
- wherein both the delivery roller and the feed roller are provided as a non-circular roller having a large diameter portion, and a small diameter portion that has a diameter smaller than that of the large diameter portion in terms of a sectional shape perpendicular to a rotation axis of the non-circular roller,
- wherein the recording medium feeding device further includes a parting member having lower conveyance resistance to the recording medium than the non-circular roller, the parting member parting the small diameter portion from the recording medium when the small diameter portion faces the recording medium,
- wherein the non-circular roller is stopped rotating in a position where the small diameter portion faces the recording medium, and
- wherein the diameter of the feed roller is equal to an integral multiple of the diameter of the delivery roller.
7 more elements
Dependencies are inferred from the claim text.