U.S. Philips Corporation

Johannes Brandsma

Johannus Wilhelmus Weekamp

Cornelis D Van Dijk

Willem R De Wild

Hermanus G Titulaer

Antonius G Holleboom

The Application describes a ceramic filter as well as a method of manufacturing same. Such filters comprise at least two stripline resonators in the form of printed metal layers which, during operation of the filter, are electromagnetically coupled and which are separated from each other by means of a ceramic dielectric. In accordance with the invention, the metal layers (preferably of palladium) must have a minimum thickness of 10 micrometers, and they are substantially rectangular in cross-section. Filters having these characteristics exhibit surprisingly low insertion losses during operation. The invention can very advantageously be used in so-called broadline-coupling filters.

Ceramic filter having reduced insertion losses

The invention relates to a method of manufacturing a flexible fastening member (19) comprising a foil (1) for fastening an object (15) thereto, characterized by making at least two generally U-shaped incisions (5) which are spaced apart, which define a central portion (23) between them, and which are directed oppositely to another, the open ends of the U-shapes facing away from another so as to create two mutually opposed tags (11), and by bending the foil (1) along two parallel bending lines (13), each line being situated at the open end of a U-shaped incision (5) so as to obtain a generally U-shaped member (19) whose base is said central portion (23), and to obtain the tags (11) as extensions of the legs (25) of said U-shaped member and situated at one side of the plane (20) defined by the central portion (23), the legs (25) being situated at the other side of said plane (20). The invention also relates to a fastening member obtained by the method, an object provided with such a fastening member, a support provided with an object and such a fastening member, and a packaging provided with a number of such fastening members.

Flexible fastening member and object provided with such a fastening

A sintering press for comprising a stack of foils is formed of a lower die, an upper die opposing the lower die and a furnance surrounding the dies. At least one of the two dies is supported at its end face remote from the other die by a spherical bearing surface so that this die can adjust itself by tilting so that the center lines of the two dies are no longer in line with each other. As a result, a uniform pressure distribution is obtained on the stack of foils.

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Roermond, Netherlands

Johannes Brandsma