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Class Information
Number: 425/199
Name: Plastic article or earthenware shaping or treating: apparatus > With upstream screen or perforated plate for straining, homogenizing, or mixing material to be shaped > Plural screens or plates
Description: Apparatus comprising a plurality of filter or perforated plates.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8640881 Screen changer Feb. 4, 2014
8622221 Device for filtering polymer melts Jan. 7, 2014
8585897 Cylindrical back washing purification apparatus Nov. 19, 2013
8449283 Dies for forming extrusions with thick and thin walls May. 28, 2013
8387942 Dies for manufacturing diamond discs Mar. 5, 2013
8202423 Melt filter for purifying plastic melts Jun. 19, 2012
8146750 Rotary fan press Apr. 3, 2012
8066924 Method of manufacturing an alloyed film and apparatus for the method Nov. 29, 2011
8029260 Apparatus for extruding cellulose fibers Oct. 4, 2011
8029259 Array of nozzles for extruding multiple cellulose fibers Oct. 4, 2011
8017002 Device for filtering a fluid, particularly for plastic processing plants Sep. 13, 2011
8017010 Device for filtering a liquefied synthetic material Sep. 13, 2011
7976706 Melt filter Jul. 12, 2011
7975854 Rotary fan press Jul. 12, 2011
7661941 Machine with vibratable section Feb. 16, 2010
7594807 Twin-screw extruder Sep. 29, 2009
7419592 Device for filtering a fluid especially for plastic-processing installations Sep. 2, 2008
7267234 Backflushable filter device for molten material and distribution unit for a filter device of this type Sep. 11, 2007
7147774 Sliding plate filter with segmented sealing ring Dec. 12, 2006
7108500 Process and apparatus for recycling of PET-material Sep. 19, 2006
6852260 Process for preparing cleansing bars having well-defined platelet striations therein Feb. 8, 2005
6843915 Cleaning device for sieve discs Jan. 18, 2005
6790025 Extrusion molding apparatus Sep. 14, 2004
6776946 Method and apparatus for rubber extruding Aug. 17, 2004
6716016 Self-sealing compact spinneret for a melt spinning process Apr. 6, 2004
6663378 Apparatus for correcting bow in a honeycomb extrudate Dec. 16, 2003
6641728 Device for filtering a liquid, particularly for filtering a polymer plastic melt Nov. 4, 2003
6582598 Wave filter for rotary filter Jun. 24, 2003
6537454 Device for influencing the flow-through of plastic material which is heated such that it can flow through a housing Mar. 25, 2003
6533934 Filter-replacement cassette Mar. 18, 2003
6500336 Polymer melt filtering device with changing filter packets Dec. 31, 2002
6474967 Breaker plate assembly for producing bicomponent fibers in a meltblown apparatus Nov. 5, 2002
6461133 Breaker plate assembly for producing bicomponent fibers in a meltblown apparatus Oct. 8, 2002
6422852 Filter device for extruders and injection moulding machines Jul. 23, 2002
6392007 Multi-pixel liquid streams, especially fiber-forming polymeric streams, and methods and apparatus for forming same May. 21, 2002
RE37681 Filter member and screen changer for use in resin extruder Apr. 30, 2002
6375450 Extrusion apparatus for ceramic honeycomb articles Apr. 23, 2002
6342156 Multi-segment continuous filtration system Jan. 29, 2002
6325217 Backflush attachment for a filtering device Dec. 4, 2001
6325922 Filter device for cleaning plastics melts Dec. 4, 2001
6309570 Vacuum extrusion system for production of cement-based articles Oct. 30, 2001
6270703 Polymer filteration apparatus and method of use Aug. 7, 2001
6261079 Screen exchanging device Jul. 17, 2001
6241503 Spin pack for spinning multiple component fiber yarns Jun. 5, 2001
6238558 Filter changer with bimodal sealing means May. 29, 2001
6221266 Variable capacity continuous extended area filter Apr. 24, 2001
6206558 Extrusion system Mar. 27, 2001
6196820 Device for filtering plastics in injection molding machines Mar. 6, 2001
6168411 Polymer filtration method and apparatus Jan. 2, 2001
6153093 Filter screen pack for extrusion die Nov. 28, 2000

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