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. 06, 1978
Filed:
May. 19, 1977
Thomas J Briar, Trafford, PA (US);
Walter J Reese, North Huntington, PA (US);
PPG Industries, Inc., Pittsburgh, PA (US);
Abstract
An improved collet for winding strand material, such as glass strands, is disclosed. The collet is capable of expanding under fluid pressure to firmly grasp a thin-walled covering tube onto which the strand material is wound. The collet comprises a sealed chamber into which the fluid enters under pressure, a piston which is movable by the fluid pressure, expandable rings, inexpandable spacers between the rings and at one end of the set of rings opposite the piston, a plurality of fingers or wings surrounding the rings and spacers and means for connecting the rings and fingers to one another, with the piston, rings and spacers being located along a common shaft and arranged such that fluid entering the chamber forces the piston towards the rings and spacers, creating pressure on the expandable rings and expanding them and the fingers connected thereto to form a relatively even collection surface and firmly grasp the covering tube.