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US 6,641,132 B2Granted
Sheet feeding device, sheet conveying device, image scanning apparatus and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorNoriaki Sekine
Life of this patent
Estimating the term…
Abstract
A sheet feeding device of the present invention includes a feeding mechanism including a belt and a reverse roller, and circular collars or similar spacing members adjoining the belt for spacing the reverse roller and belt. When a single sheet is conveyed from a nip between the belt and the reverse roller to a preselected position downstream of the nip in the direction of sheet feed, the spacing member spaces the belt and reverse roller with the drive of only the belt or the drive of both of the belt and reverse roller being interrupted.
Claims72
A sheet feeding device comprising:
- feeding means for feeding sheets with a belt;
- a separating member for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt for spacing said separating member and said belt;
- and
- a collar support member rotatable around a shaft, said collar support member supporting the spacing member and being driven in conjunction with the belt,
- wherein said spacing member includes a pair of rotatable members positioned at both sides of the belt in a widthwise direction and when said collar support member rotates around the shaft, the rotatable members also rotate around the shaft such that the spacing member automatically spaces said belt and said separating member from each other in conjunction with rotation of said belt when a single sheet is conveyed from a nip between said belt and said separating member to a preselected position downstream of said nip in a direction of sheet feed.
3 more elements
In a sheet conveying device including a sheet feeding device, said sheet conveying device comprising:
- feeding means for feeding sheets with a belt;
- a separating member for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt for spacing said separating member and said belt;
- and
- a collar support member rotatable around a shaft, said collar support member supporting the spacing member and being driven in conjunction with the belt,
- wherein said spacing member includes a pair of rotatable members positioned at both sides of the belt in a widthwise direction and when said collar support member rotates around the shaft, the rotatable members also rotate around the shaft such that the spacing member automatically spaces said belt and said separating member from each other in conjunction with rotation of said belt when a single sheet is conveyed from a nip between said belt and said separating member to a preselected position downstream of said nip in a direction of sheet feed.
3 more elements
In an image scanning apparatus including a sheet feeding device and a sheet conveying device including said sheet feeding device, said sheet feeding device comprising:
- feeding means for feeding sheets with a belt;
- a separating member for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt for spacing said separating member and said belt;
- and
- a collar support member rotatable around a shaft, said collar support member supporting the spacing member and being driven in conjunction with the belt,
- wherein said spacing member includes a pair of rotatable members positioned at both sides of the belt in a widthwise direction and when said collar support member rotates around the shaft, the rotatable members also rotate around the shaft such that the spacing member automatically spaces said belt and said separating member from each other in conjunction with rotation of said belt when a single sheet is conveyed from a nip between said belt and said separating member to a preselected position downstream of said nip in a direction of sheet feed.
3 more elements
An image forming apparatus including a sheet feeding device and a sheet conveying device including said sheet feeding device, said sheet feeding device comprising:
- feeding means for feeding sheets with a belt;
- a separating member for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt for spacing said separating member and said belt;
- and
- a collar support member rotatable around a shaft, said support member supporting the spacing member and being driven in conjunction with the belt,
- wherein said spacing member includes a pair of rotatable members positioned at both sides of the belt in a widthwise direction and when said collar support member rotates around the shaft, the rotatable members also rotate around the shaft such that the spacing member automatically spaces said belt and said separating member from each other in conjunction with rotation of said belt when a single sheet is conveyed from a nip between said belt and said separating member to a preselected position downstream of said nip in a direction of sheet feed.
3 more elements
A sheet feeding device comprising:
- feeding means for feeding sheets with a belt;
- a reverse roller rotatable in a direction opposite to a direction of sheet feed for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt for spacing said reverse roller and said belt;
- and
- a preventing member for preventing a sheet conveyed to a nip between said belt and said reverse roller from being conveyed in the direction opposite to the direction of sheet feed.
2 more elements
A sheet feeding device comprising:
- feeding means for feeding sheets with a belt;
- a reverse roller rotatable in a direction opposite to a direction of sheet feed for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt for automatically spacing said reverse roller and said belt from each other via rotation of said belt;
- and
- a collar support member rotatable around a shaft, said collar support member supporting the spacing member and being driven in conjunction with the belt,
- wherein said spacing member includes a pair of rotatable members positioned at both sides of the belt in a widthwise direction and when said collar support member rotates around the shaft, the rotatable members also rotate around the shaft such that the spacing member automatically spaces said belt and said separating member from each other in conjunction with rotation of said belt when a single sheet is conveyed from a nip between said belt and said separating member to a preselected position downstream of said nip in a direction of sheet feed,
- wherein said spacing member comprises a cylindrical body rotatable only in a direction of sheet feed.
4 more elements
A sheet feeding device comprising:
- feeding means for feeding sheets with a belt;
- a reverse roller rotatable in a direction opposite to a direction of sheet feed for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt for spacing said reverse roller and said belt;
- drive transmitting means for selectively setting up or interrupting drive transmission to said reverse roller;
- rotation stopping means for stopping rotation of said reverse roller;
- and
- control means for causing, when said reverse roller and said belt are spaced from each other by said spacing member, said drive transmitting means to interrupt the drive transmission and causing said rotation stopping means to stop the rotation of said reverse roller.
4 more elements
In a sheet conveying device including a sheet feeding device, said sheet feeding device comprising:
- feeding means for feeding sheets with a belt;
- a reverse roller rotatable in a direction opposite to a direction of sheet feed for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt for spacing said reverse roller and said belt;
- and
- a preventing member for preventing a sheet conveyed to a nip between said belt and said reverse roller from being conveyed in the direction opposite to the direction of sheet feed.
2 more elements
A sheet conveying device including a sheet feeding device, said sheet feeding device comprising:
- feeding means for feeding sheets with a belt;
- a reverse roller rotatable in a direction opposite to a direction of sheet feed for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt for automatically spacing said reverse roller and said belt from each other via rotation of said belt;
- and
- a collar support member rotatable around a shaft, said collar support member supporting the spacing member and being driven in conjunction with the belt,
- wherein said spacing member includes a pair of rotatable members positioned at both sides of the belt in a widthwise direction and when said collar support member rotates around the shaft, the rotatable members also rotate around the shaft such that the spacing member automatically spaces said belt and said separating member from each other in conjunction with rotation of said belt when a single sheet is conveyed from a nip between said belt and said separating member to a preselected position downstream of said nip in a direction of sheet feed,
- wherein said spacing member comprises a cylindrical body rotatable only in a direction of sheet feed.
4 more elements
A sheet conveying device including a sheet feeding device, said sheet feeding device comprising:
- feeding means for feeding sheets with a belt;
- a reverse roller rotatable in a direction opposite to a direction of sheet feed for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt for spacing said reverse roller and said belt;
- drive transmitting means for selectively setting up or interrupting drive transmission to said reverse roller;
- rotation stopping means for stopping rotation of said reverse roller;
- and
- control means for causing, when said reverse roller and said belt are spaced from each other by said spacing member, said drive transmitting means to interrupt the drive transmission and causing said rotation stopping means to stop the rotation of said reverse roller.
4 more elements
An image scanning apparatus including a sheet feeding device and a sheet conveying device including said sheet feeding device, said sheet feeding device comprising:
- feeding means for feeding sheets with a belt;
- a reverse roller rotatable in a direction opposite to a direction of sheet feed for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt for spacing said reverse roller and said belt;
- and
- a preventing member for preventing a sheet conveyed to a nip between said belt and said reverse roller from being conveyed in the direction opposite to the direction of sheet feed.
2 more elements
In an image scanning device including a sheet feeding device and a sheet conveying device including said sheet feeding device, said sheet feeding device comprising:
- feeding means for feeding sheets with a belt;
- a reverse roller rotatable in a direction opposite to a direction of sheet feed for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt for automatically spacing said reverse roller and said belt from each other via rotation of said belt;
- and
- a collar support member rotatable around a shaft, said collar support member supporting the spacing member and being driven in conjunction with the belt,
- wherein said spacing member includes a pair of rotatable members positioned at both sides of the belt in a widthwise direction and when said collar support member rotates around the shaft, the rotatable members also rotate around the shaft such that the spacing member automatically spaces said belt and said separating member from each other in conjunction with rotation of said belt when a single sheet is conveyed from a nip between said belt and said separating member to a preselected position downstream of said nip in a direction of sheet feed,
- wherein said spacing member comprises a cylindrical body rotatable only in a direction of sheet feed.
4 more elements
In an image scanning device including a sheet feeding device and a sheet conveying device including said sheet feeding device, said sheet feeding device comprising:
- feeding means for feeding sheets with a belt;
- a reverse roller rotatable in a direction opposite to a direction of sheet feed for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt for spacing said reverse roller and said belt;
- drive transmitting means for selectively setting up or interrupting drive transmission to said reverse roller;
- rotation stopping means for stopping rotation of said reverse roller;
- and
- control means for causing, when said reverse roller and said belt are spaced from each other by said spacing member, said drive transmitting means to interrupt the drive transmission and causing said rotation stopping means to stop the rotation of said reverse roller.
4 more elements
In an image forming apparatus including a sheet feeding device and a sheet conveying device including said sheet feeding device, said sheet feeding device comprising:
- feeding means for feeding sheets with a belt;
- a reverse roller rotatable in a direction opposite to a direction of sheet feed for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt for spacing said reverse roller and said belt;
- and
- a preventing member for preventing a sheet conveyed to a nip between said belt and said reverse roller from being conveyed in the direction opposite to the direction of sheet feed.
2 more elements
In an image forming apparatus including a sheet feeding device and a sheet conveying device including said sheet feeding device, said sheet feeding device comprising:
- feeding means for feeding sheets with a belt;
- a reverse roller rotatable in a direction opposite to a direction of sheet feed for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt for automatically spacing said reverse roller and said belt from each other via rotation of said belt;
- and
- a collar support member rotatable around a shaft, said collar support member supporting the spacing member and being driven in conjunction with the belt,
- wherein said spacing member includes a pair of rotatable members positioned at both sides of the belt in a widthwise direction and when said collar support member rotates around the shaft, the rotatable members also rotate around the shaft such that the spacing member automatically spaces said belt and said separating member from each other in conjunction with rotation of said belt when a single sheet is conveyed from a nip between said belt and said separating member to a preselected position downstream of said nip in a direction of sheet feed,
- wherein said spacing member comprises a cylindrical body rotatable only in a direction of sheet feed.
4 more elements
In an image forming apparatus including a sheet feeding device and a sheet conveying device including said sheet feeding device, said sheet feeding device comprising:
- feeding means for feeding sheets with a belt;
- a reverse roller rotatable in a direction opposite to a direction of sheet feed for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt for spacing said reverse roller and said belt;
- drive transmitting means for selectively setting up or interrupting drive transmission to said reverse roller;
- rotation stopping means for stopping rotation of said reverse roller;
- and
- control means for causing, when said reverse roller and said belt are spaced from each other by said spacing member, said drive transmitting means to interrupt the drive transmission and causing said rotation stopping means to stop the rotation of said reverse roller.
4 more elements
A sheet feeding device comprising:
- a sheet feeder configured to feed sheets with a belt;
- a separating member configured to separate the sheets one by one in contact with said belt;
- a spacing member adjoining said belt and configured to space said separating member and said belt;
- and
- a collar support member rotatable around a shaft, said collar support member supporting the spacing member and being driven in conjunction with the belt,
- wherein said spacing member includes a pair of rotatable members positioned at both sides of the belt in a widthwise direction and when said collar support member rotates around the shaft, the rotatable members also rotate around the shaft such that the spacing member automatically spaces said belt and said separating member from each other in conjunction with rotation of said belt when a single sheet is conveyed from a nip between said belt and said separating member to a preselected position downstream of said nip in a direction of sheet feed.
3 more elements
A sheet feeding device comprising:
- a sheet feeder configured to feed sheets with a belt;
- a reverse roller rotatable in a direction opposite to a direction of sheet feed for separating the sheets one by one in contact with said belt;
- a spacing member adjoining said belt and configured to space said reverse roller and said belt;
- and
- a preventing member configured to prevent a sheet conveyed to a nip between said belt and said reverse roller from being conveyed in the direction opposite to the direction of sheet feed.
2 more elements
A sheet feeding device comprising:
- a sheet feeder configured to feed sheets with a belt;
- a reverse roller rotatable in a direction opposite to a direction of sheet feed and configured to separate the sheets one by one in contact with said belt;
- a spacing member adjoining said belt and configured to automatically space said reverse roller and said belt from each other via rotation of said belt;
- and
- a collar support member rotatable around a shaft, said collar support member supporting the spacing member and being driven in conjunction with the belt,
- wherein said spacing member includes a pair of rotatable members positioned at both sides of the belt in a widthwise direction and when said collar support member rotates around the shaft, the rotatable members also rotate around the shaft such that the spacing member automatically spaces said belt and said separating member from each other in conjunction with rotation of said belt when a single sheet is conveyed from a nip between said belt and said separating member to a preselected position downstream of said nip in a direction of sheet feed,
- wherein said spacing member comprises a cylindrical body rotatable only in a direction of sheet feed.
4 more elements
A sheet feeding device comprising:
- a sheet feeder configured to feed sheets with a belt;
- a reverse roller rotatable in a direction opposite to a direction of sheet feed and configured to separate the sheets one by one in contact with said belt;
- a spacing member adjoining said belt and configured to space said reverse roller and said belt;
- a drive transmitting unit configured to selectively set up or interrupt drive transmission to said reverse roller;
- a rotation stopping unit configured to stop rotation of said reverse roller;
- and
- a controller configured to cause, when said reverse roller and said belt are spaced from each other by said spacing member, said drive transmitting unit to interrupt the drive transmission and causing said rotation stopping unit to stop the rotation of said reverse roller.
4 more elements
Dependencies are inferred from the claim text.