Method and apparatus for intermittently applying particulate powder material to a fibrous substrate

An apparatus and method for applying particulate powder material to a moving fibrous substrate (58) is disclosed. The apparatus includes a volumetric dry material feeder (22) for forming a continuous stream of particulate powder material. The continuous stream is then transmitted through a nozzle (3...

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Bibliographische Detailangaben
1. Verfasser:	PELLEY, KENNETH ANTHONY
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL ATOMISING APPARATUS BANDAGES, DRESSINGS OR ABSORBENT PADS BLASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS DRYING DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FOMENTATION GENERAL PROCESSES OF COMPOUNDING HEATING HUMAN NECESSITIES HYGIENE INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS LIGHTING MAKING GRANULES OR PREFORMS MECHANICAL ENGINEERING MEDICAL OR VETERINARY SCIENCE METALLURGY NOZZLES ORGANIC MACROMOLECULAR COMPOUNDS ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL PROSTHESES RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS SPRAYING APPARATUS SPRAYING OR ATOMISING IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OR PROTECTION OF EYES OR EARS WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	An apparatus and method for applying particulate powder material to a moving fibrous substrate (58) is disclosed. The apparatus includes a volumetric dry material feeder (22) for forming a continuous stream of particulate powder material. The continuous stream is then transmitted through a nozzle (38) and exits at an outlet (42) thereof. The nozzle is movable between a first and second position (47, 49) by a motion control. The motion control includes an adjustable differential gear box and an encoder for synchronizing the dispensing of powder at a predetermined location of the substrate. A flow separator (41) is disposed beyond the outlet (42) of the nozzle (38) and intermediate of the first and second positions (47, 49). In operation, the motion input drives the nozzle (38) to oscillate between the first and second positions (47, 49) at a variable speed over each product cycle. As the nozzle (38) crosses a plane of the flow separator (41), the continuous stream of particulate powder material exiting the nozzle (38) is split into two intermittent streams of particulate powder material. The first intermittent stream is applied to a predetermined location of the moving fibrous substrate (58) to form a layer of particulate powder material within a predetermined portion of the substrate (58). The second intermittent stream is recirculated back to the volumetric dry material feeder (22).