The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 14, 1992
Filed:
Aug. 29, 1990
David Gubernick, Cherry Hill, NJ (US);
Robert H Kirchhoff, Amherst, MA (US);
George N Helmstetter, Belle Mead, NJ (US);
Chicopee, New Brunswick, NJ (US);
Abstract
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.