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:
Jun. 15, 1993
Filed:
Nov. 30, 1990
Joseph F Cocchetto, Painted Post, NY (US);
Harry A Kragle, Corning, NY (US);
Floyd E Stumpff, Elmira, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
A method and apparatus for forming a skin on an extruded honeycomb structure, wherein detrimental distortion of the peripheral cells is eliminated to thus provide a virtually distortion free honeycomb structure with an integral skin. Batch material is supplied for forming the central cellular structure, and a metered flow of skin-forming batch material is transitioned from a predominantly transverse flow to a predominantly longitudinal flow so as to minimize the distortion of web portions of the peripheral cells. In addition, the skin-forming batch material is subjected to a first or primary flow path reduction in the form of flow depth and then, as it is knitting with peripheral web portions of the central cellular structure, it is subjected to a second or secondary flow path reduction in the form of reduced cross-sectional area, so as to effect a complete knitting thereof while still within the extrusion die. A unitary cellular structure with an integral skin is then discharged from the die with improved structural and strength characteristics.