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:
Aug. 30, 1977
Filed:
Oct. 06, 1976
William L Schaefer, Gibsonia, PA (US);
PPG Industries, Inc., Pittsburgh, PA (US);
Abstract
A method and apparatus for the chopping of glass strands is disclosed. The back-up or cot roller for the chopping blades includes an annular cutting surface or ring which is mounted on an expandable wheel, such as an inflatable wheel. By varying fluid pressure within the inflatable wheel, variations in the resiliency of the cutting surface are realized. This allows for a smoother operation of the chopping system and increases the life of the cutting surface. Further, the expandable wheel around which the cutting surface rides will adapt for variations in the thickness of the annular cutting surface and still give a consistent mesh with the cutting blades. Thus, it is now possible to employ cutting rings having inconsistent inner and outer diameters and to resurface the cutting surface by grinding that portion of the surface which has been partially gouged by the cutting blades to an even surface once again and thus to reuse the cutting ring. This reduces replacement costs for the annular cutting surface rings or cots by further increasing their life expectancy, thus improving the efficiency of the chopping system.