Patent ID: 11911873
Assignee: SHORT BROTHERS PLC
Field: Surface technology, coating (Chemistry)
Classification: CPC B  F  G | IPC B  F  G

Claim 0:
1. A method for manufacturing a noise-attenuating device, the method comprising:
bonding a facing sheet to a cellular core so that an inner side of the facing sheet faces a first side of the cellular core;
producing an abrasive blasting mask by:
applying a photosensitive masking material on an outer side of the facing sheet; and
selectively exposing the photosensitive masking material to light configured to activate the photosensitive masking material, wherein selectively exposing the photosensitive masking material to light comprises projecting one or more images on the photosensitive masking material; and

after bonding the facing sheet to the cellular core, perforating the facing sheet by abrasive blasting the facing sheet, the one or more images being configured to cause the formation of one or more holes in the photosensitive masking material in a region not overlapping the structure of the cellular core and substantially avoid the formation of holes in the photosensitive masking material in a region overlapping a structure of the cellular core.