Apparatus and method of measuring paper size by using sensor
First Claim
Patent Images
1. A method of measuring a paper size in a paper feeder having a fixedly mounted body part and a fastener apparatus movable depending on the paper size, the method comprising:
- receiving light reflected from a side portion of the body part having a plurality of sections at a corresponding plurality of distances from the fastener apparatus with respect to a sent amount of light; and
determining a paper size corresponding to the received amount of the light.
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Abstract
A method of measuring a paper size using a paper feeder having a fixedly mounted body part and a fastener apparatus movable depending on the paper size includes receiving light reflected from the body part with respect to an amount of a sent light, measuring the amount of the received light, and extracting information on a paper size corresponding to the measured amount of light from stored information. The extracted information of the paper size can be transmitted to a display unit, so that a user can recognize the information.
7 Citations
36 Claims
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1. A method of measuring a paper size in a paper feeder having a fixedly mounted body part and a fastener apparatus movable depending on the paper size, the method comprising:
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receiving light reflected from a side portion of the body part having a plurality of sections at a corresponding plurality of distances from the fastener apparatus with respect to a sent amount of light; and determining a paper size corresponding to the received amount of the light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A paper feeder to measure a paper size, comprising:
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a fastener apparatus movable depending on the paper size of paper contained in, the paper feeder; a body part to contain the paper in the paper feeder, the body part comprising a side portion facing the fastener apparatus and having a plurality of sections at a corresponding plurality of distances from the fastener apparatus; a light-sending unit to output light towards the side portion of the body part; a light-receiving unit to receive light reflected from the side portion of the body part with respect to an amount of light sent by the light-sending unit; and a control unit to determine a paper size corresponding to the received amount of light. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A paper feeder used with an image-forming apparatus, comprising:
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a body part to receive one of a first paper having a first size and a second paper having a second size, and having a side portion having a plurality of sections; and a fastener apparatus to move with respect to the body part according to the received one of the first paper and the second paper, and to receive one of a first light reflected from the side portion of the body part when the first paper is disposed in the body part, and a second light reflected from the side portion of the body part when the second paper is disposed in the body part; and a control unit to determine one of the first size and the second size according to one of a first amount of the first light and a second amount of the second light, wherein the side portion faces the fastener apparatus and the plurality of sections are at a corresponding plurality of distances from the fastener apparatus. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification