Parallel filters for plastic melts

US6117320A · kind A · utility

Assignee

• Lindauer DORNIER Gesellschaft mbH · DE

Inventors

• Andreas Rutz · Gettorf, DE
• Friedrich Mueller · Schifferstadt, DE

Key dates

• Filing date: May 27, 1999
• Grant date: Sep 12, 2000
• Expiry date: May 27, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C48/08
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A filter for filtering plastic melt prior to feeding the melt into an extruder nozzle, for example a thermoplastic film extruder nozzle, has preferably two filter housings for holding respective exchangeable filter cartridges. Both filter housings are articulated by hinges to a column mounting so that one filter housing can be serviced while the other filter housing with its filter cartridge is in a filtering position and vice versa. A single filter may be used alternatively. In both instances the column mounting may include at least one, preferably two, mounting columns.