METHOD FOR THE MANUFACTURE OF A FILTER PLATE

substantially flat polymer, preferably thermoplastic, frame and substantially flat filter material seated fixedly therein. The method is characterized by its reduced exposure of the filter material to adverse mechanical stresses resultant of polymeric frame formation and curing. Toward such end, the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	VIGNA, JAMES, J, STANKOWSKI, RALPH
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	substantially flat polymer, preferably thermoplastic, frame and substantially flat filter material seated fixedly therein. The method is characterized by its reduced exposure of the filter material to adverse mechanical stresses resultant of polymeric frame formation and curing. Toward such end, the substantially flat polymeric frame is formed in at least two separate steps, in the course of which said substantially flat filter material is incorporated. The portion formed first (100) serves as a mechanical restraint, insulating the later incorporated filter material from any propensity of the second "embedding portion (18) to shrink or otherwise warp during its formation. L'invention concerne un procédé permettant de produire une plaque filtrante (10) sensiblement plate, qui comprend un cadre polymère sensiblement plat, de préférence, thermoplastique, et un matériau filtrant sensiblement plat logé dans ledit cadre. Ce procédé est caractérisé par une exposition réduite du matériau filtrant à des contraintes mécaniques négatives résultant de la formation et du durcissement du cadre polymère. A cette fin, le cadre polymère est formé au moins en deux étapes pendant lesquelles le matériau filtrant sensiblement plat est incorporé. La partie (100) formée en premier sert de retenue mécanique protégeant le matériau filtrant incorporé en dernier contre la tendance de la seconde partie d'incorporation (18) à rétrécir ou autrement à se déformer pendant sa formation.