Apparatus and methods for applying adhesive filaments onto one or more moving narrow substrates
AssigneeNordson Corporation
InventorsLaurence B. Saidman, Raza Hayder, Mehmet Sinangil
Life of this patent
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Abstract
Apparatus and methods for applying adhesive to one or more narrow substrates, such as elastic strands, that are in motion. The apparatus includes a coating applicator and an air moving device mounted adjacent to the coating applicator. The coating applicator is capable of applying adhesive in the form of an adhesive filament in a pattern onto each narrow substrate. The air moving device includes one or more air discharge passages capable of directing a flow of air toward the narrow substrate. The flow of air transfers momentum to airborne sections of the adhesive filament for promoting coating uniformity on the narrow substrate.
Claims12
An apparatus for applying an adhesive filament in a back-and-forth pattern onto at least one narrow substrate moving in a machine direction, comprising:
- an applicator capable of dispensing the adhesive filament onto the at least one narrow substrate and capable of impinging the adhesive filament with a plurality of air jets to create the back-and-forth pattern with airborne filament sections extending from the at least one narrow substrate transverse to the machine direction;
- and
- an air moving device mounted adjacent to said applicator, said air moving device including at least one air discharge passage capable of directing a flow of air that impinges the airborne filament sections downstream in the machine direction from said applicator in order to improve the uniformity of the pattern.
A method for dispensing an adhesive filament onto at least one narrow substrate moving in a machine direction, comprising:
- dispensing an adhesive filament toward the at least one narrow substrate at an adhesive application location;
- impinging the adhesive filament with a plurality of air jets to move the adhesive filament with a back-and-forth pattern transverse to the machine direction;
- applying the adhesive filament to the at least one narrow substrate leaving airborne filament sections extending transversely of the at least one narrow substrate along the length of the at least one narrow substrate downstream of the adhesive application location;
- and
- directing a flow of air at the airborne filament sections that impinges the transversely-extending airborne filament sections downstream in the machine direction from the adhesive application location.
An apparatus for applying an adhesive filament onto at least one narrow substrate moving in a machine direction, comprising:
- an applicator configured to dispense the adhesive filament onto the narrow substrate in a back-and-forth pattern having airborne filament sections extending transversely relative to the machine direction;
- and
- an air moving device mounted adjacent to said applicator, said air moving device including at least one air discharge passage capable of directing a flow of air toward the airborne filament sections downstream from said applicator in order to improve the uniformity of the pattern, and said at least one air discharge passage oriented relative to the at least one narrow substrate such that said flow of air is approximately parallel to the machine direction.
A method for dispensing an adhesive filament onto at least one narrow substrate moving in a machine direction, comprising:
- dispensing an adhesive filament toward the at least one narrow substrate at an adhesive application location,
- moving the adhesive filament back-and-forth transverse to the machine direction;
- applying the adhesive filament to the at least one narrow substrate leaving airborne filament sections along the length of the narrow substrate downstream of the adhesive application location;
- and
- directing a flow of air at the airborne filament sections and generally parallel to the machine direction to transfer linear momentum to the airborne filament sections and thereby improve pattern uniformity.
Dependencies are inferred from the claim text.