US 3,995,074 AGranted

Method for the manufacture of fasteners

AssigneeUSM Corporation

InventorsRichard J. Duffy, Richard M. Elliott, Philip J. Rodden

Life of this patent

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Abstract

A method is provided for the continuous manufacture of self-locking internally threaded fasteners having a locking body or patch comprised of resilient thermoplastic material, applied to the fastener in powder form. A support member having a plurality of cavities for receiving said fasteners, and a nozzle associated with each of said cavities, is moved along a path through a plurality of locations wherein the fastener is deposited at a cavity aligned with a respective nozzle at a first location, material is forced through the nozzle onto the fastener at a second location, the fasteners are removed from the respective support at a third location, and the nozzles are purged of material at a fourth location prior to the initiation of a subsequent sequence of operations by the apparatus.

Claims4

Dependent claims

The method of applying a locking patch of resilient thermoplastic resin to an internally threaded article having an opening at both ends of the threaded portion comprising the steps of;

supporting the article adjacent a conduit having an opening therein directed toward that portion of the internal threads to which the patch is to be applied;
said article having a temperature sufficient to cause the thermoplastic powder to adhere to its surface;
moving said article and conduit along a predetermined path to locate a second opening in said conduit into registry with a source of thermoplastic resin powder under pressure, forcing the resin through said conduit in a direction toward the article, removing the article from adjacent said conduit, and
moving said conduit along said predetermined path to a position wherein air air is forced through said conduit in a direction away from the article-whereby excess powder residue is removed from said conduit opening.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 05/572,199Filed 28 Apr 1975 · division
Priority: 10 Sep 1973
Granted: 30 Nov 1976
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

B05B 7/1477
Arrangements for supplying particulate material: means for supplying to several spray apparatus
B05B 13/0609
Specially designed for treating the inside of hollow bodies: the hollow bodies being automatically fed to, or removed from, the machine
B23G 11/00
Feeding or discharging mechanisms combined with, or arranged in, or specially adapted
B05B
Spraying apparatus