US Patent No: 8,172,227
Number of patents in Portfolio can not be more than 2000
Sheet detecting device and image forming apparatus
Stats
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May 8, 2012
Issued date -
Oct 13, 2010
filing date -
12/904,028
serial no -
In Force
status
Importance
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Abstract
A sheet detecting device includes a rotation unit having an abutment surface, a positioning unit configured to position the rotation unit in a standby position where the leading edge of the conveyed sheet abuts the abutment surface, and a detecting unit configured to detect the conveyed sheet on the basis of the rotation of the rotation unit pressed by the conveyed sheet, wherein the rotation unit rotates to a sheet passage posture where the sheet is allowed to pass after being pressed by the leading edge of the conveyed sheet and, when the trailing edge of the conveyed sheet passes the rotation unit, the rotation unit is rotated from the sheet passage posture in the same direction as a sheet conveying direction and is positioned in the standby position.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,204,726 Copying paper feed sensing device for a copying apparatus | 8 | 1991 | |
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| 4,395,035 Air shingler | 2 | 1980 | |
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| 2010/0148,431 SHEET FEEDING DEVICE AND IMAGE FORMING APPARATUS PROVIDED WITH THE SHEET FEEDING DEVICE | 1 | 2009 | |
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| 5,651,538 Paper feeding method of an image forming apparatus | 10 | 1995 | |
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| 5,923,140 Detecting device for detecting the traveling state of a moving object | 3 | 1997 | |
Patent Citation Ranking
Maintenance Fees
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| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Nov 8, 2015 |
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| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Nov 8, 2023 |
| Fee | Large entity fee | small entity fee | micro entity fee |
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