Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Measuring a weight or volume
Patent
1977-07-20
1979-05-22
White, Robert F.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Measuring a weight or volume
264 407, 264113, 264119, 264121, 264122, B29J 508
Patent
active
041559681
ABSTRACT:
An improved method or process for the continuous manufacture of mats to be processed into composition boards is disclosed, the board-forming process being a dry process involving hot-pressing of the mats and curing of the binder. The mats comprise a fibrous or particulate material or materials, and a binder, the mats being dry. The mat material is laid onto a conveyor by formers or felters. In order to ensure that the resulting composition board has a uniform strength distribution and uniform specific gravity or density, a beta ray density measuring device measures successively the weight of air-borne material passing through a conduit or conduits to the forming apparatus, and the measured value is used to regulate the speed of the conveyor. A gamma ray density measuring device is disposed just beyond the forming apparatus to measure the weight of mats emerging from the forming process, with the measured value being used to regulate a shave-off roll movable vertically above the formed mat, to regulate the height of the mat such that the mat, when formed into a board, will have uniform strength distribution and uniform specific gravity or density.
REFERENCES:
patent: 2698271 (1954-12-01), Clark
patent: 3632371 (1972-01-01), Mikulka
patent: 4091161 (1978-05-01), Desverchere
Eumi Yoichi
Fujiki Miyoji
Ishii Fumikatsu
Shimabayashi Tutomu
Yamamoto Teruo
Hall James R.
Hokushin Gohan Kabushiki Kaisha
White Robert F.
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