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US 9,102,175 B2Granted
Transport roller, transport unit, and printing apparatus
AssigneeSeiko Epson Corporation
InventorsKoichi Saito, Katsunori Ono, Kenji Ozawa
Life of this patent
Estimating the term…
Abstract
A transport roller includes: a roller body of which a pair of end surfaces face each other by a press work so as to be in a cylindrical shape; and a high friction layer which contains inorganic particles and is provided on a surface of the roller body. Here, the roller body is provided with a joining portion which is formed by separating the pair of end surfaces. In addition, an average particle diameter of the inorganic particle is larger than a distance between the pair of the end surfaces of the roller body on an outer peripheral surface side thereof.
Claims20
A transport roller comprising:
- a roller body that includes a cylindrical shaft having a joint between end surfaces of a rolled plate defining the cylindrical shaft, the joint extending between one axial end of the cylindrical shaft and an opposite axial end of the cylindrical shaft;
- and
- a high friction layer which contains inorganic particles therein and is provided on a surface of the cylindrical shaft in a rotation direction of the roller, wherein a portion of the inorganic particles protrude from the surface in a transportation area on which a medium is transported, and
- wherein the joint has a gap that is covered with inorganic particles in the transportation area,
- wherein the cylindrical shaft comprises an outer peripheral surface and an inner peripheral surface, wherein a gap distance between end surfaces at the outer peripheral surface is larger than a gap distance between end surfaces at the inner peripheral surface,
- wherein a highest position of the inorganic particles on the surface of the cylindrical shaft in the transportation area is substantially the same as a highest position of the inorganic particles covering the gap of the outer surface in the transportation area and
- wherein a part of the at least some inorganic particles straddle across the distance between the pair of the end surfaces in the joining portion.
4 more elements
A transport roller comprising:
- a roller body that includes a cylindrical shaft having a joint between end surfaces of a rolled plate defining the cylindrical shaft, the joint extending between one axial end of the cylindrical shaft and an opposite axial end of the cylindrical shaft;
- and
- a high friction layer which contains inorganic particles therein and is provided on a surface of the cylindrical shaft in a rotation direction of the roller, wherein a portion of the inorganic particles protrude from the surface in a transportation area on which a medium is transported, and
- wherein the joint has a gap that is covered with inorganic particles in the transportation area,
- wherein the cylindrical shaft comprises an outer peripheral surface and an inner peripheral surface, wherein a gap distance between end surfaces at the outer peripheral surface is larger than a gap distance between end surfaces at the inner peripheral surface,
- wherein a highest position of the inorganic particles on the surface of the cylindrical shaft in the transportation area is substantially the same as a highest position of the inorganic particles covering the gap of the outer surface in the transportation area, and
- wherein a minimum particle diameter of the at least some inorganic particles is larger than the shortest distance between the pair of the end surfaces of the joining portion.
4 more elements
A transport roller comprising:
- a roller body that includes a cylindrical shaft having a joint between end surfaces of a rolled plate defining the cylindrical shaft, the joint extending between one axial end of the cylindrical shaft and an opposite axial end of the cylindrical shaft;
- and
- a high friction layer which contains inorganic particles therein and is provided on a surface of the cylindrical shaft in a rotation direction of the roller, wherein a portion of the inorganic particles protrude from the surface in a transportation area on which a medium is transported, and
- wherein the joint has a gap that is covered with inorganic particles in the transportation area,
- wherein the cylindrical shaft comprises an outer peripheral surface and an inner peripheral surface, wherein a gap distance between end surfaces at the outer peripheral surface is larger than a gap distance between end surfaces at the inner peripheral surface,
- wherein a highest position of the inorganic particles on the surface of the cylindrical shaft in the transportation area is substantially the same as a highest position of the inorganic particles covering the gap of the outer surface in the transportation area, and
- wherein the at least some of the inorganic particles include inorganic particles having a diameter larger than the gap distance between end surfaces at the outer peripheral surface so as to extend over the gap.
4 more elements
Dependencies are inferred from the claim text.