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US 8,910,938 B2Granted
Medium carrying device and image forming apparatus
AssigneeOki Data Corporation
InventorTakahiro Sunohara
Life of this patent
Estimating the term…
Abstract
A medium carrying device includes a first pair of rollers that forms a nip part and carries a medium, the nip part being defined as an area where the rollers contact each other applying a pressure to other, a guide part that guides the medium to the first pair of rollers, and a medium detection member that includes a tip end part and a pivoting fulcrum and that is pivoted around the pivoting fulcrum by the medium as the medium moves along the guide part. In a case of being viewed from a roller axial direction of the first pair of rollers, the tip end part passes the nip part when the medium detection member pivots around the pivoting fulcrum as a center.
Claims8
A medium carrying device, comprising:
- a first pair of rollers that forms a nip part and carries a medium, the nip part being defined as an area where the rollers contact each other applying a pressure to the other;
- a guide part that guides the medium to the first pair of rollers;
- and
- a medium detection member that includes a tip end part and a pivoting fulcrum and that is pivoted around the pivoting fulcrum by the medium as the medium moves along the guide part, wherein
- in a case of being viewed from a roller axial direction of the first pair of rollers, the tip end part passes the nip part when the medium detection member pivots around the pivoting fulcrum as a center;
- the medium detection member is configured to detect whether or not the medium is present in the guide part and to output a detection result,
- the medium carrying device, further comprising:
- a second pair of rollers arranged on a downstream side of the first pair of rollers in a medium carrying direction;
- and
- a controller unit that controls rotation of the first pair of rollers and the second pair of rollers based on a detection result of the medium detection member;
- the medium detection member;
- detects a rear end of the medium, and
- the controller unit reverses a rotation direction of the second pair of rollers after the rear end of the medium is detected by the medium detection member and a predetermined period of time passes.
10 more elements
A medium carrying device, comprising:
- a first pair of rollers that forms a nip part and carries a medium, the nip part being defined as an area where the rollers contact each other applying a pressure to the other;
- a guide part that guides the medium to the first pair of rollers;
- and
- a medium detection member that includes a tip end part and a pivoting fulcrum and that is pivoted around the pivoting fulcrum by the medium as the medium moves along the guide part, wherein
- a medium detection sensor that detects a medium state whether the medium is present or not-present according to a pivotal position of the medium detection member, wherein
- the tip end part of the medium detection member moves between a first position and a second position,
- the first position at which the medium passing through the guide part makes a first contact to the medium detection member,
- the second position at which the medium detection member is fully pivoted by the medium so that the medium detection member does not move further by being pushed by the medium,
- in a case of being viewed from a roller axial direction of the first pair of rollers, the tip end part of the medium detection member at the second position is ranged within the nip part.
6 more elements
An image forming apparatus, comprising:
- an image forming part that forms an image to a medium;
- a first pair of rollers that forms a nip part and carries the medium on which the image is formed, the nip part being defined as an area where the rollers contact each other applying a pressure to the other;
- a guide part that guides the medium to the first pair of rollers;
- a medium detection member that includes a tip end part and a pivoting fulcrum and that is pivoted around the pivoting fulcrum by the medium as directly contacting the medium, and
- a medium detection sensor that detects a medium state whether the medium is present or not-present according to a pivotal position of the medium detection member, wherein
- the tip end part of the medium detection member moves between a first position and a second position,
- the first position at which the medium passing through the guide part makes a first contact to the medium detection member,
- the second position at which the medium detection member is fully pivoted by the medium so that the medium detection member does not move further by being pushed by the medium;
- in a case of being viewed from a roller axial direction of the first pair of rollers, the tip end part of the medium detection member at the second position is ranged within the nip part.
6 more elements
Dependencies are inferred from the claim text.