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. 28, 1984
Filed:
Apr. 26, 1982
Jerry C Hedden, Shelby, NC (US);
Lesley M Allen, Shelby, NC (US);
PPG Industries, Inc., Pittsburgh, PA (US);
Abstract
A package of wound glass fiber strand from which the glass fiber strands can be removed more efficiently for feeding into processing operations. The wound package of glass fiber strand is a package of superimposed annular layers of glass fiber strands having a central longitudinal, cylindrical cavity about which the strands are wound and having an outer cylindrical surface and a substantially flat circular top and bottom section. This package is covered with a stretchable polymeric film having a stiffness modulus of at least 1200 pounds/square inch and an elongation of about at least 5 and a thickness of about 0.75 to about 10 mils. The stretchable polymeric film is stretched around the package of glass fiber strands with a force greater than 4 pounds (18 Newtons) to stretch the film to cover the outer peripheral, cylindrical portion and to extend at least 0.5 inches (1.27 cm.) radially onto the top and bottom flat circular portions of the package. The polymeric film is stretched around the package for one or more wraps. The method of producing the wrapped package includes preparing a package of glass fiber strands wound in superimposed annular layers to have a central longitudinal, cylindrical cavity and an outer cylindrical surface and a substantially flat circular top and bottom section where at least one free end of the glass fiber strand extends into the central cavity for removal from the interior to the exterior of the package with the package prepared a stretchable polymeric material is selected having a stress modulus of at least about 1200 pounds per square inch and a percent elongation of at least about 5 and a thickness of about 0.75 to 10 mils. This stretchable polymeric film is wrapped about the package with a stretching force of greater than 4 pounds (18 Newtons) to stretch the film to cover the outer cylindrical portion of the package and to extend radially 0.5 inches onto the flat top and bottom circular portions of the package in one or more wraps.