Snap fastener and tooling therefor
AssigneeSnapFast Industries, Inc.
InventorFrederick G. Schriever
Life of this patent
Estimating the term…
Abstract
A snap fastener having a stud with a pear-shaped head has a grommet assembly for removable mounting on the stud with the grommet assembly comprising a metal tooth cap and an annular plastic retainer with the fabric squeezed therebetween and prongs of the cap extending through the fabric and clinched over the retainer, and with the head of the stud disposed between the cap and retainer and with the fabric extending uninterruptedly over the head of the stud. Tooling is shown for quickly assembling the tooth cap and retainer to the fabric.
Claims27
A snap fastener for holding a fabric to a support comprising, in combination:
- a stud having a relatively rigid pear shaped head and a shank for mounting to a support with the head uppermost;
- a relatively rigid retainer having an aperture sized for snapping reception in one direction over the head of the stud and retention against removal except in said one direction;
- a cap having a crown and a plurality of spaced apart prongs extending substantially perpendicular to the crown;
- said crown positionable on one side of a fabric and said retainer positionable on the opposite side of such fabric with said prongs extendable through the fabric and clinchable around and over the retainer independently of said aperture on the opposite side from said fabric to hold the fabric securely between the retainer and the crown with the fabric extending uninterruptedly over the head of the stud and held on the support to which the stud is mounted.
A grommet assembly for a snap fastener comprising, in combination:
- a cap having a crown of circular configuration with an outer peripheral edge and a plurality of angularly spaced apart resistingly bendable teeth extending substantially perpendicular to the crown;
- and
- a relatively rigid circular retainer of generally annular plate shape having a pair of opposed faces with an outer peripheral edge, a central aperture sized for snapping reception in one direction over the head of a stud and retention against removal except in said one direction, a plurality of angularly spaced apart slots extending completely through the retainer adjacent the outer periphery thereof in corresponding angular relation to the teeth of said crown and a plurality of radical grooves formed in one of said faces and extending inward from each slot toward the central aperture and having a depth to accommodate in flush mating engagement teeth of the cap extending through the slots and clinched against the surface of the retainer within the grooves.
A retainer member for cooperation with a tooth cap of a snap fastener grommet assembly, comprising:
- a circular relatively rigid plate-like member having opposed oppositely facing surfaces with an outer peripheral edge and a central aperture defining an inner peripheral edge;
- said member having on one of said surfaces a circular groove concentric to said aperture;
- a plurality of circumaxial spaced apart slots extending through the member from one surface to the other in alignment with and for reception of the teeth of a cap;
- and
- a plurality of radial grooves in that surface of the member opposite the surface containing the circular grooves, extending from each slot toward the central aperture and having a width and a depth to receive in substantially flush mating engagement the teeth of a toothed cap bent over and clinched against such surface of the member within the radially extending grooves.
Dependencies are inferred from the claim text.