Back to results
US 9,168,554 B2Granted
System, nozzle, and method for coating elastic strands
AssigneeNordson Corporation
InventorsJoel E. Saine, Charles P. Ganzer
Life of this patent
Estimating the term…
Abstract
A contact nozzle for coating an elastic strand with an adhesive. Air is discharged at the adhesive in contact with the strand, causing the adhesive to spread around the periphery of the strand. The air assists with release of the adhesive from the nozzle and also cleans the nozzle to discourage adhesive build-up on the nozzle.
Claims21
A contact nozzle for coating at least one elastic strand with an adhesive, a first strand having a periphery with an upper surface and moving in a machine direction, the contact nozzle comprising:
- a nozzle body including a front side, a rear side, and a first V shaped notch for receiving the first strand and extending between said front and rear sides;
- a first adhesive passage formed in said nozzle body and terminating at a first adhesive orifice communicating with said first V-shaped notch and adapted to be directed at the upper surface of the first strand to deliver the adhesive into contact with the upper surface of the first strand;
- a first expansion chamber formed in said nozzle body and communicating with said first adhesive orifice, said first expansion chamber sized to enable die swell of the adhesive exiting said first adhesive orifice;
- and
- a first air passage positioned proximate to said first adhesive passage and terminating at a first air orifice positioned downstream from said first adhesive orifice in the machine direction, said first air orifice being positioned above said first adhesive orifice in said nozzle body, and said first air orifice adapted to be directed toward the upper surface of the first strand and adapted to discharge air at the adhesive in contact with the first strand to cause the adhesive to spread around the periphery of the first strand.
2 more elements
The contact nozzle of claim , further comprising:
- a second V-shaped notch formed in said nozzle body and spaced from the first V-shaped notch in a lateral direction transverse to the machine direction, said second V-shaped notch extending between said front and rear sides and adapted to receive a second strand moving in the machine direction;
- a second adhesive passage formed in said nozzle body and terminating at a second adhesive orifice communicating with said second V-shaped notch and adapted to be directed at an upper surface of the second strand to deliver the adhesive into contact with the upper surface of the second strand;
- a second expansion chamber formed in said nozzle body and communicating with said second adhesive orifice, said second expansion chamber sized to enable die swell of the adhesive exiting said second adhesive orifice;
- and
- a second air passage formed in said nozzle body and terminating at a second air orifice positioned downstream from said second adhesive orifice in the machine direction, said second air orifice adapted to be directed toward the upper surface of the second strand and adapted to discharge air at the adhesive in contact with the second strand to cause the adhesive to spread around a periphery of the second strand.
2 more elements
Dependencies are inferred from the claim text.