Patent ID: 6578240
Filing Date: 2003-06-17
Classification: B42F,Y10T

Abstract:
A sheet binding fastener comprising:a first member having an elongate cylindrical first tube open at a first end and having a flange extending radially outwardly from the first tube at a second end; a second member having an elongate second tube open at a first end and having a flange extending radially outwardly from the second tube at a second end; an interior diameter of the second tube being marginally less than an interior diameter of the first tube such that the first end of the second tube is insertable into the first end of the first tube for coaxial telescopic sliding of the second tube within the first tube; the first member having a first catch member extending axially within the first tube towards the one end thereof and having a catch shoulder directed away from the one end; the second member having a second catch member extending axially within the second tube towards the one end thereof and having a catch shoulder directed away from said one end; on insertion of the second tube into the first tube, the catch shoulders of the first and second catch members moving axially past each other to assume positions with the catch shoulders opposed to each other whereby axially removal of the second tube from the first tube is prevented by engagement of the catch shoulders; one of the first catch members and second catch members comprising a deflectable catch member being deflectable radially from an inherent position which it inherently assumes to a deflected release position in which the catch shoulders thereof is moved radially sufficiently to avoid engagement with the catch shoulder of the other catch member and permit axially movement of the second tube from the first tube; the one of the first and second members carrying the deflectable catch member having a release member mounted thereto for axially sliding between an extended position and a retracted position; a spring biasing the release member towards the extended position; the release member on movement to the retracted position engaging the deflectable catch member and deflecting it to, the release position; the release member having an outer end adapted for engagement manually at the second end of the one of the first and second member carrying the deflectable catch member.