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US 7,753,359 B2Granted
Sheet conveyance apparatus and image forming apparatus
AssigneeKonica Minolta Business Technologies, Inc.
InventorTomoo Suzuki
Life of this patent
Estimating the term…
Abstract
A sheet conveyance apparatus having: a conveyance roller, wherein a surface roughness Ra of a surface layer remains in a range from 8 μm to 30 μm, at a stage where a total length of sheets conveyed reaches at 42,000 m.
Claims6
A sheet conveyance apparatus, comprising:
- a conveyance roller in contact with a sheet with pressure to convey the sheet having a surface layer made up of rubber on which grooves having widths and depths of 0.5 to 1 mm are formed parallel to a rotation axis of the conveyance roller,
- wherein the surface layer is processed so that an initial value of surface roughness Ra is in a range from 8 μm to 30 μm.
An image forming apparatus, comprising:
- an image forming section to form an image;
- and
- a sheet feeding section having a feeding roller to feed a sheet to the image forming section;
- wherein the feeding roller has a surface layer made up of rubber on which grooves having widths and depths of 0.5 to 1 mm are formed parallel to a rotation axis of the conveyance roller,
- wherein the surface layer is processed so that an initial value of surface roughens Ra is in a range from 8 μm to 30 μm.
2 more elements
Dependencies are inferred from the claim text.