Mcneil-ppc, Inc.

Chicopee

Robert H Kirchhoff

William A James

David Gubernick

Robert G Provell

Stephen H Breitkopf

George N Helmstetter

An improved laser processing head comprising a housing, a lens holder-nozzle mounted within the housing and a gas distributor for introducing gas adjacent a focusing lens retained within the housing to cool the lens and prevent the lens from becoming contaminated or damaged from material ablated from the workpiece. The gas distributor is comprised of a plurality of angled distribution slots that creates a vortex gas flow action directed away from the face of the lens and towards the nozzle outlet.

Laser-processing head for laser processing apparatus

Melt blown die apparatus are provided for producing a fibrous web from a polymer material. The apparatus includes a die and a primary gas assembly for providing a pressurized gas at the exit end of the die. The primary gas assembly includes a tubular chamber for receiving and distributing the pressurized gas along the first dimension of the die. The tubular chamber includes a pressure control diverter for providing a substantially even gas pressure distribution across the first dimension of the die. This apparatus can be operated at exit air flow rates of up to about 200 pounds of air per pound of polymer at a polymer flow rate of about 4.0 pounds per linear die inch per minute. Constructions are provided for minimizing bending moments and for providing thermal and structural stability to the apparatus.

Primary air system for a melt blown die apparatus

Growing community of inventors

Amherst, MA, United States of America

Robert H Kirchhoff