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:
Mar. 21, 2000
Filed:
Feb. 17, 1998
Satoru Nitta, Shizuoka, JP;
Koji Mizunuma, Shizuoka, JP;
Toshiba Machine Co., Ltd., Tokyo, JP;
Abstract
A novel method of adjusting a heat-displacing T-die is provided wherein a T-die slit gap is adjusted by thermal expansion and contraction of die bolts individually provided with heaters so that a sheet or film material has a target profile in thickness, characterized in that a thickness feed back control loop and a virtual temperature control loop are provided, and in the thickness feed back control loop, data of thickness of products are subjected to a profile treatment to correct a target profile for temperature setting and changing of die bolts so as to define an appropriate slit gap, and in the virtual temperature control loop, an appropriate die bolt temperature is predicted from a control output value of the heater and a radiation temperature to the circumference so as to calculate a corresponding power to be supplied to the heater.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile