Collated screw package formed with welded wires
US5482420A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1994 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Nov 10, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S411/966
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A collated screw package is formed with a plurality of parallel screws secured to each other with two wires which are sufficiently friable to permit the screws to be singly detached from the package as the screw is driven by a rotary drilling device. The wires are preferably spot welded to unthreaded portions of each screw which prevents fragments of the wires and fragments of the spot welded joints from interfering with the screw threads. To form the unthreaded portions, the thread of each screw is interrupted for a portion to allow at least one of the wires to be secured to the screw shank at the interruption. The interruption is formed by a relief in a continuous surface of thread forming tooling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.