Sheet conveying apparatus with curl correction and image forming apparatus having same
AssigneeCanon Kabushiki Kaisha
InventorMasato Nishio
Life of this patent
Estimating the term…
Abstract
A sheet conveying apparatus has a roller together with first and second rotary members abutting against an outer periphery of the roller to form, respectively, first and second nips through which a sheet passes to correct a curl in the sheet. A guide member is arranged in a central portion in an axial direction of the first rotary member so as to extend along the outer periphery of the roller to guide the sheet continuously from a position upstream of the first nip towards the second nip.
Claims16
A sheet conveying apparatus comprising:
- a roller;
- a first rotary member abutting against an outer periphery of said roller to form a first nip;
- a second rotary member abutting against an outer periphery of said roller to form a second nip at a downstream position of said first nip in a conveying direction, said roller, said first rotary member, and said second rotary member passing a sheet through said first nip and said second nip to correct a curl in the sheet;
- and
- a guide member arranged in a central portion in an axial direction of said first rotary member so as to extend along the outer periphery of said roller to guide the sheet continuously from a position upstream of said first nip to said second nip.
An image forming apparatus which fixes an image formed on a sheet by an image forming portion to the sheet by a fixing roller before discharging the sheet, said image forming apparatus comprising:
- a first path for discharging the sheet passed through said fixing roller,
- a second path branching off from said first path;
- a third path branching off from said second path and joins into said first path;
- a surface reverse roller pair for conveying the sheet introduced into said second path from said first path;
- and
- a plurality of rollers disposed at said third path for correcting a curl in the sheet being conveyed through said third path,
- wherein said surface reverse roller pair conveys the sheet introduced into said second path from said first path in a forward direction, then said surface reverse roller pair conveys the sheet in a reverse direction so that the sheet is introduced into said third path from said second path.
A sheet conveying apparatus comprising:
- a first path for guiding a sheet;
- a second path branching off from the first path;
- a flapper for selectively guiding the sheet to the first path and the second path;
- a surface reverse roller pair for switchback-conveying the sheet guided to the second path by said flapper in a direction in which the sheet is introduced into the second path from the flapper and in a direction opposite thereto;
- a third path for guiding the sheet switchback-conveyed in the opposite direction by the surface reverse roller pair from the second path to the first path;
- and
- a plurality of rollers for correcting a curl in the sheet passing through the third path,
- wherein at least a part of the flapper and at least a part of said plurality of rollers are arranged in a region divided by the first path, the second path, and the third path.
An image forming apparatus comprising:
- a fixing roller for fixing an image formed on a sheet by an image forming portion to the sheet;
- a first path for guiding the sheet passed through the fixing roller;
- a second path branching off from the first path,
- a flapper for selectively guiding the sheet to the first path and the second path;
- a surface reverse roller pair for switchback-conveying the sheet guided to the second path by said flapper in a direction in which the sheet is introduced into the second path from said flapper and in a direction opposite thereto;
- a third path for guiding the sheet switchback-conveyed in the opposite direction by the surface reverse roller pair from the second path to the first path;
- and
- a plurality of rollers for correcting a curl in the sheet passing through the third path,
- wherein at least a part of the flapper and at least a part of said plurality of rollers are arranged in a region divided by the first path, the second path, and the third path.
Dependencies are inferred from the claim text.