Patent ID: 9114597
Filing Date: 2015-08-25
Classification: B29C,B32B,B42F,Y10T

Abstract:
1. A method of making a protected file fastener having a pair of prongs having proximal and distal ends, comprising the steps of: a. cutting a length of shrinkable tubing from a supply of continuous tubing, said length having distal and proximal ends; b. providing a flow of air into an opening of the length of tubing to expand its distal open end; c. driving said length of tubing between a pair of rollers onto the proximal end of a prong, said rollers having a circumferential groove in their outer periphery, and bringing said rollers together to define a space between said grooves which is smaller than the diameter of said tube, so as to grasp the tube d. with the length of tubing covering at least part of said prong, further gripping the proximal end of the tubing between a pair of jaws and further driving the tubing on to the prong until the distal end of the tubing reaches the distal end of the prong; e. shrinking the length of tubing.