Fastener dispensing needle and method of making

Details Fastener dispensing needle and method of making Fastener dispensing needle and method of making

1990-04-06

1991-08-27

Dean, R.

Needle and pin making

Needle making

Processes

148 12R, 148 124, 148320, B21G 318, C21D 100

Patent

active

050425587

ABSTRACT:
A fastener dispensing needle is manufactured by a machining process which includes bending a metal tube to assist in obtaining an important configuration for the tip of the needle. A flared portion of the needle tip determines the diameter of the hole made through the material of the object being penetrated by the needle. This flared portion is sized to make a hole at least large enough to overlap with the diameter of the central bore through the needle. This minimizes unnecessary stresses on the fastener as it is ejected from the needle, thus resulting in fewer undesired breakages of the fasteners. In addition, the area of the needle where the central bore and longitudinal groove merge into the tip portion of the needle is configured to minimize cutting action on the filament of the fastener, again resulting in fewer undesired breakages.

REFERENCES:
patent: 3470834 (1969-10-01), Bone
patent: 4039078 (1977-08-01), Bone

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