The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 2005
Filed:
Jan. 28, 2002
Takashi Sasaki, Tokyo, JP;
Kenichiro Yahiro, Tokyo, JP;
Takao Maruyama, Tokyo, JP;
Yoshitatsu Mori, Tokyo, JP;
Takahiro Ishizaki, Tokyo, JP;
Kenji Takao, Tokyo, JP;
Hirofumi Shimizu, Tokyo, JP;
Takashi Sasaki, Tokyo, JP;
Kenichiro Yahiro, Tokyo, JP;
Takao Maruyama, Tokyo, JP;
Yoshitatsu Mori, Tokyo, JP;
Takahiro Ishizaki, Tokyo, JP;
Kenji Takao, Tokyo, JP;
Hirofumi Shimizu, Tokyo, JP;
Yokogawa Electric Corporation, Tokyo, JP;
Abstract
The present invention is characterized in that in a simulation for predicting a steam pressure setpoint after grade change, an initial moisture percentage is evaluated from differences between bone-dry basis weights and between machine speeds before and after grade change; the bone-dry coated weight of a size is evaluated from the flow rate and concentration thereof; and then the dryer inlet moisture percentage of a web after a size press is calculated from the coated weight. Thus, the invention intends to improve the quality of products through precise dryer control, as well as reduce the time required for grade change, by precisely predicting the web's initial moisture percentage at the dryer inlet after grade change and precisely and quickly controlling dryer steam pressure during grade change.