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:
Apr. 02, 1991
Filed:
Apr. 21, 1989
Gary C Marshall, Oil City, PA (US);
Joy Technologies Inc., Pittsburgh, PA (US);
Abstract
An elongatable conveyor belt having an internal stretch limiter is disclosed. The conveyor belt includes a lower layer of transverse reinforcing cords and an upper layer of transverse reinforcing cords disposed at opposing angles relative to the transverse axis of the conveyor belt. Preferably, depressions are formed in the upper transverse reinforcing cords to facilitate troughing of the conveyor belt. An internal stretch limiter such as an angularly woven fabric, sinusoidally disposed cords or stretchable cords are provided only in the central region of the belt. Because stretch limiting devices are only provided in the center of the conveyor belt, the belt remains in tension to retain material thereon during horizontal curves while enabling the outer edge to elongate to negotiate the curve.