发明名称 |
On-line (paper) sheet formation characterizing device. |
摘要 |
<p>A device for characterizing the formation of a sheet material is described. The device comprises a basis weight sensor for measuring the basis weight of the sheet material as the material passes through the sensor and signal processing circuitry which receives a signal from the basis weight sensor indicative of the measured basis weight and which produces three types of outputs, which outputs characterize: (1) the magnitude of variation in the sheet basis weight; (2) the strength of the weakest portion or portions of the sheet; and (3) the size of the flocs comprising the sheet. The basis weight sensor includes a light pipe which is held against the sheet, as the sheet moves through the sensor, and which directs a small spot of light transmitted through the sheet to a light detecting device. The magnitude of variation in the sheet basis weight is computed to be proportional to the true root-mean-square variation in the basis weight of the sheet.</p> |
申请公布号 |
EP0267712(A2) |
申请公布日期 |
1988.05.18 |
申请号 |
EP19870309549 |
申请日期 |
1987.10.29 |
申请人 |
MEASUREX CORPORATION |
发明人 |
CHASE, LEE MACARTHUR;ORKOSALO, JORMA JUHANI;NORTON, KENT MICHAEL |
分类号 |
G01N21/59;D21F7/00;G01G9/00;G01G17/02;G01N21/86;G01N21/88;G01N21/89;G01N21/892;G01N21/93 |
主分类号 |
G01N21/59 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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