Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Control means responsive to product weight or dimension
Patent
1993-02-11
1994-03-22
Thurlow, Jeffery
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Control means responsive to product weight or dimension
100 93RP, 264 405, 264175, 425367, 425194, B29C 4324, B29C 4358
Patent
active
052958035
ABSTRACT:
A device for controlling the thickness of a sheet in calendering includes a thickness measuring unit for measuring the thickness of the sheet immediately after it has been formed by a pair of calender rolls, and a roll adjusting unit for moving at least one of the pair of calender rolls toward and away from the other calender roll. The device further includes a detection unit for detecting change in distance between the axes of the pair of calender rolls, and a control device for comparing the measured thickness of the sheet with a target thickness to obtain a difference therebetween. The control device then calculates a gap adjusting value on the basis of the difference, and compares the change in distance between the axes of the rolls detected by the detection unit with the calculated gap adjusting value. When these values become equal, the control device stops the movement of the one calender roll to make the thickness of the sheet equal to the target thickness.
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Patent Abstracts of Japan, vol. 011, No. 380 (M-650) Dec. 11, 1987.
Patent Abstracts of Japan, vol. 9, No. 311 (M-436)(2034) Dec. 7, 1985.
Ogawa Shigeyuki
Suzuki Masaru
Bridgestone Corporation
Thurlow Jeffery
Vargot Mathieu
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