The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 24, 2003
Filed:
Dec. 01, 2000
Applicant:
Inventor:
Udo Michaelis, Alsbach-Hähnlein, DE;
Assignee:
Firma Carl Freudenberg, Weinheim, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 4/514 ; B29C 7/076 ;
U.S. Cl.
CPC ...
B29C 4/514 ; B29C 7/076 ;
Abstract
The bellows ( ) of a filter cartridge is inserted into an injection-molding die ( ) and provided with the plastic frame ( ) by an injection-molding process. The surfaces of the die ( ) that lie opposite one another are provided, at least at their edge surfaces ( ), with sawtooth-like profiles ( ). The sawtooth-like profiles engage with one another and hold the individual folds ( ) of the bellows ( ) in a defined position relative to one another. The bellows ( ) is held by the profiles ( ) at its face edges ( ) over a narrow region ( ), and pressed together, forming a seal, for the injection-molding process.