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US 8,262,082 B2Granted
Medium supplying unit and image forming apparatus having the same
AssigneeSamsung Electronics Co., Ltd.
InventorJin-Soo Lee
Life of this patent
Estimating the term…
Abstract
A medium supplying unit of an image forming apparatus includes: a cassette frame; a loading plate which is movably coupled to the cassette frame, and which supports a printing medium thereon; a pickup roller which picks up the printing medium from the loading plate; and a loading plate moving unit which causes the loading plate between a knock up state in which the loading plate located to allow the printing medium can be picked up by the pickup roller and a knock down state in which the loading plate is separated from the pickup roller, the loading plate moving unit causing the loading plate to move during when the loading plate is in the knock down state so as to reduce the occurrence of multiple sheets of printing media being picked up and supplied.
Claims22
A printing medium supplying unit of an image forming apparatus, comprising:
- a medium supplying unit frame;
- a loading plate movably coupled to the medium supplying unit frame, the loading plate including a surface for supporting a plurality of printing media thereon, the loading plate being movable between a knock up state and a knock down state
- a pickup roller disposed at a location in relation to the loading plate such that, when the loading plate is in the knock up state, the pick up roller is capable of contacting at least one of the plurality of printing media supported on the surface of the loading plate to pick up the at least one of the plurality of printing media, and, when the loading plate is in the knock down state, the pickup roller is spaced apart from the plurality of printing media, the loading plate being positioned in a knock up state such that the pickup roller allows to contact and to pick up at least one of the plurality of printing media supported on the surface of the loading plate, or the loading plate being positioned in a knock down state such that the pickup roller is spaced apart from the plurality of printing media;
- and
- a loading plate moving unit having a cam formed with a plurality of prominence portions and a plurality of depressed portions to repeatedly move the loading plate in opposite directions when the loading plate is in the knock down state and arranged to rotate in interlocked manner with the pickup roller, the loading plate moving unit being configured to cooperate with a portion of the loading plate to impart movements of the loading plate in opposite directions when the loading plate is in the knock down state.
2 more elements
An image forming apparatus, comprising:
- a main body frame defining an outer appearance of the image forming apparatus;
- an image forming unit which forms an image on a printing medium;
- and
- a printing medium supplying unit frame for supplying the printing medium to the image forming unit, the printing medium supplying unit comprising:
- a loading plate movably coupled to the medium supplying unit frame, the loading plate including a surface for supporting a plurality of printing media thereon, the loading plate being movable between a knock up state and a knock down state;
- a pickup roller disposed at a location in relation to the loading plate such that, when the loading plate is in the knock up state, the pick up roller is capable of contacting at least one of the plurality of printing media supported on the surface of the loading plate to pick up the at least one of the plurality of printing media, and, when the loading plate is in the knock down state, the pickup roller is spaced apart from the plurality of printing media, the loading plate being positioned in a knock up state such that the pickup roller allows to contact and to pick up at least one of the plurality of printing media supported on the surface of the loading plate, or the loading plate being positioned in a knock down state such that the pickup roller is spaced apart from the plurality of printing media;
- and
- a loading plate moving unit having a cam formed with a plurality of prominence portions and a plurality of depressed portions to repeatedly move the loading plate in opposite directions when the loading plate is in the knock down state and arranged to rotate in interlocked manner with the pickup roller, the loading plate moving unit being configured to cooperate with a portion of the loading plate to impart movements of the loading plate in opposite directions when the loading plate is in the knock down state.
5 more elements
A printing medium supplying unit of an image forming apparatus, comprising:
- a medium supplying unit frame;
- a loading plate movably coupled to the medium supplying unit frame, the loading plate including a surface for supporting a plurality of printing media thereon, the loading plate being positioned in a knock up state so that a pick up roller of the image forming apparatus allows to contact and to pick up at least one of the plurality of printing media supported on the surface of the loading plate, or the loading plate being positioned in a knock down state so that the pickup roller is spaced apart from the plurality of printing media;
- and
- a loading plate moving unit having a cam formed with a plurality of prominence portions and a plurality of depressed portions to repeatedly move the loading plate in opposite directions when the loading plate is in the knock down state and configured to impart movements of the loading plate in opposite directions when the loading plate is in the knock down state.
1 more element
A printing medium supplying unit of an image forming apparatus, comprising:
- a medium supplying unit frame;
- a loading plate movably coupled to the medium supplying unit frame, the loading plate including a surface for supporting a plurality of printing media thereon, the loading plate being positioned in a knock up state so that a pick up roller of the image forming apparatus allows to contact and to pick up at least one of the plurality of printing media supported on the surface of the loading plate, or the loading plate being positioned in a knock down state so that the pickup roller is spaced apart from the plurality of printing media;
- and
- a loading plate moving unit having a cam formed with a plurality of prominence portions and a plurality of depressed portions to repeatedly move the loading plate in opposite directions when the loading plate is in the knock down state.
1 more element
Dependencies are inferred from the claim text.