Coated fasteners and process for making the same
AssigneeNylok Fastener Corporation
InventorRichard Duffy
Life of this patent
Estimating the term…
Abstract
A fastener, and a process and apparatus for coating fasteners, in which a resin type material is applied to the fastener is disclosed. A stream of resin type material is directed to each fastener and the threads of each of the fasteners, the threads may be covered over an arcuate variable length including complete 360.degree. coverage. The resin type material applied may be a masking material, a lubricating material and/or an insulating material enabling an accurate and consistent torque-tension characteristic to be maintained during coupling of the fastener in a variety of post-processing environments. Furthermore, the resin type material applied to the fastener is substantially resistant to the deposition of corrosion resistant or preventative materials.
Claims30
A process of directing at least one of a thermoplastic masking, insulating and lubricating type material to the threads of an internally threaded article having an opening on at least one end, comprising the steps of:
- supporting said threaded article for treatment;
- heating said threaded article to a temperature sufficient to enable said material to adhere to the threads of said threaded article;
- inserting said nozzle into the opening of said threaded article;
- discharging a gaseous jet containing said material from said nozzle toward the threads of said threaded article;
- and
- depositing said material onto the heated threads of said threaded article and accumulating said material on the threads to form at least one of a substantially uniform masking, insulating and lubricating coating.
A process of directing a stream of a Teflon type material to the threads of a threaded article comprising the steps of:
- movably supporting said threaded article for treatment;
- heating said threaded article to a temperature sufficient to enable said Teflon type material to adhere to the threads of said threaded article;
- and
- discharging said stream of Teflon type material toward the threads of said threaded article, said threaded article moved relative to said stream to form at least one of a substyantially uniform masking, insulating and lubricating layer of said Teflon type material, said layer having a thickness of at least about 20 microns.
A process of directing at least one of a thermoplastic masking, insulating and lubricating type material sprayed from a nozzle to the threads of an internally threaded article having openings at both ends, comprising the steps of:
- supporting said treaded article for treatment;
- heating said threaded article to a temperature sufficient to enable said material to adhere to the threads of said threaded article;
- inserting said nozzle and coupled conduit into one of the openings of said threaded article;
- discharging said stream of material from said nozzle toward the threads of said threaded articles, the direction of flow of said steam in the portion of said conduit disposed between the open ends of said threaded article being substantially parallel to the longitudinal axis of said threaded article and the direction of flow of said stream at the opening of said nozzle being substantially perpendicular to and semicircularly radiating from and lying in a thin semicircular layer contered on the longitudinal axis of said threaded article;
- and
- depositing said material onto the heated threads of said threaded article and accumulating said material on the threads to form at least one of a masking, insulating and lubricating coating.
A process of directing a Teflon type material sprayed from a nozzle to the threads of an internally threaded article having openings at both ends, comprising the steps of:
- supporting said threaded article for treatment;
- heating said threaded article to a temperature sufficient to enable said Teflon type material to adhere to the threads of said threaded article;
- inserting said nozzle and a coupled conduit into one of the openings of said threaded article;
- discharging a gaseous jet containing said Teflon type material from said nozzle toward the threads of said threaded article, the direction of flow of said gaseous jet in the portion of said conduit disposed between the open ends of said threaded article being substantially parallel to the longitudinal axis of said threaded article and the direction of flow of said gaseous jet at the opening of said nozzle being substantially perpendicular to the longitudinal axis and forming a thin circular layer about the longitudinal axis of said threaded article;
- and
- depositing said Teflon type material onto the heated threads of said threaded article and accumulating said Teflon type material on hte threads to form at least one of a masking, insulating, and lubricating patch.
A method of covering with at least one of a thermoplastic masking, insulating and lubricating type material substantially all the threads of an internally threaded article having at least one opening, comprising the steps of:
- supporting said threaded article for treatment;
- heating said threaded article to a temperature sufficient to enable said material to adhere to the threads of said threaded article;
- discharging a stream of said material toward the threads of said threaded article, the stream having a flow direction at the opening of said nozzle substantially perpendicular to and semicircularly extending about the longitudinal axis of said threaded article;
- and
- depositing said material onto the heated threads of said threaded article, said threaded article and said nozzle rotatable relative to one another enabling coverage of substantially all the threads of said threaded article to form at least one of a masking, lubricating and insulating covering.
A method of directing a stream of Teflon type material to the threads of an internally threaded article having openings at both ends, comprising the steps of:
- supporting said threaded article for treatment;
- heating said threaded article to a temperature sufficient to enable said Teflon type material to adhere to the threads of said threaded article;
- discharging said stream of Teflon type material toward the threads of said threaded article;
- and
- depositing said Teflon type material onto the heated threads of said threaded article and accumulating said Teflon type material on the threads, forming a substantially uniform Teflon covering having a thickness of at least about 20 microns to about 50 microns to at least one of mask, lubricate and insulate the threads of said threaded article.
A method for covering with fluorocarbon type material substantially all the threads of an internally threaded article having openings at both ends, comprising the steps of:
- supporting said threaded article for treatment;
- heating said threaded article to a temperature sufficient to enable said fluorocarbon type material to adhere to the threads of said threaded article;
- moving a nozzle having selectable nozzle opening dimensions and said threaded article relative to one another and selectively discharging a stream of said fluorocarbon type material from said nozzle toward the threads of said threaded article, said stream having a flow direction at the opening of said nozzle substantially perpendicular to and substantially circularly disposed about the longitudinal axis of said threaded article;
- and
- depositing said fluorocarbon type material onto the heated threads of said threaded article during said step of relatively moving said nozzle and said threaded article to cover substantially all the threads of said threaded article and form at least one of a masking, lubricating and insulating covering.
A process of applying Teflon type covering onto the threads of an internally threaded article having at least one open end, the process using a thermoplastic type Teflon powder sprayed onto the threads, comprising the steps:
- movably supporting said internally threaded article for treatment;
- heating said internally threaded article to a temperature sufficient to enable said Teflon powder to adhere to the threads and form said Teflon type covering;
- positioning a movable spray applicator adjacent said movably supported internally threaded article;
- discharging a gaseous jet containing said thermoplastic type Teflon powder from said movable spray applicator onto the threads of said internally threaded article, said spray applicator and threaded article moved relative to one another to form at least one of a masking, lubricating, and insulating Teflon type covering having a substantially uniform layer which is at least about 20 microns to about 50 microns thick.
A substantially uniform coating of Teflon type material on a threaded article the product prepared by directing a stream of thermoplastic type Teflon powder to the threads of said threaded article, said product prepared in accordance with a process comprising the steps of:
- supporting said threaded article in a position to receive said Teflon type powder;
- heating said threaded article to a temperature sufficient to enable said Teflon type powder to adhere to the threads of said threaded article;
- discharging said stream of Teflon type powder toward the threads of said threaded article;
- and
- depositing said Teflon type powder onto the heated threads of said threaded article for a length of time sufficient to create a substantially uniform Teflon type layer resistant to the deposition of corrosion resistant material for at least one of masking, lubricating and insulating the threads of said threaded article.
A process of directing a fluorocarbon type material to the threads of an internally threaded article having an opening on at least one end, comprising the steps of:
- supporting said threaded article for treatment;
- heating said threaded article to a temperature sufficient to enable said fluorocarbon type material to adhere to the threads of said threaded article;
- inserting said nozzle into the opening of said threaded article;
- discharging a gaseous jet containing said fluorocarbon type material from said nozzle toward the threads of said threaded article;
- and
- depositing said fluorocarbon type material onto the heated threads of said threaded article and accumulating said fluorocarbon type material on the threads to form at least one of a substantially uniform masking, insulating and lubricating coating.
Dependencies are inferred from the claim text.