Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Measuring a weight or volume
Patent
1993-05-26
1994-09-27
Kuhns, Allan R.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Measuring a weight or volume
264113, 425140, 425141, 425345, 425353, B29C 4320
Patent
active
053505484
ABSTRACT:
A method of making two-layer tablets or pellets in a twin rotor pressing machine, in which method during a normal manufacturing period powdery or particulate material is fed into die bores of a die rotor so as to form first layers, said first layers are compressed in a first step by plungers synchronously rotating with the die rotor so as to form first layer pressed articles, the two layers within the die bores are compressed in a second step by said plungers so as to obtain two-layer tablets or pellets, and said two-layer tablets or pellets are removed at a main discharge station, and in which method during an inspection period first layer pressed articles removed at an intermediate discharge station or two-layer tablets or pellets removed at said main discharge station are fed to an inspection station, characterized in that during the inspection period said first layers are compressed more than in said first step during the normal manufacturing period before samples thereof are withdrawn at said intermediate discharge station, and in that the second layers are compressed and the resulting second layer pressed articles are fed either to a scrap path or to said inspection station at least after removal of said samples of the first layer pressed articles.
REFERENCES:
patent: 2944493 (1960-07-01), Bailey et al.
patent: 3063390 (1962-11-01), Frank
patent: 3158109 (1964-11-01), Stott
patent: 4452570 (1984-06-01), Janson
patent: 4999151 (1991-03-01), Hinzpeter
patent: 5158728 (1992-10-01), Sanderson et al.
patent: 5213738 (1993-05-01), Hampton et al.
Derwent Abstract of DE 22 51 832.
Brommrowitz Helmut
Hinzpeter Jurgen
Schmidt Ingo
Kuhns Allan R.
Wilhelm Fette GmbH
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