False threadscrew and screwstrip
AssigneeG. Lyle Habermehl
InventorsG. Lyle Habermehl, Troy D. Hale, Robert S. Bartley
Life of this patent
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Abstract
A threaded fastener having a threaded shank with threads on a forward portion of the shank near the tip of greater size than threads on a rear portion of the shank. A collated screwstrip comprising a plastic holding strap holding a plurality of such fasteners in a row in spaced side-by-side relation with the holding strap in threaded engagement with the smaller rear thread portion of each fastener.
Claims21
A collated screwstrip comprising a plastic holding strip and a plurality of threaded fasteners,
- each fastener disposed about an axis and having a head at a rear end, a tip extending from the other forward end and a shank extending from below the head to the tip about the axis,
- threads about the shank formed as at least portions of a helix about the shank of constant pitch,
- the threads having a forward thread portion and a rear thread portion rearward of the forward thread portion,
- the threads over the forward thread portion being of larger size than the threads over the rear thread portion,
- the holding strip holding the fasteners in a row in spaced side-by-side relation with the axis of the fasteners in a common plane and the rear thread portion of each screw in threaded engagement with the holding strip.
A collated screwstrip comprising a plastic holding strip and a plurality of threaded fasteners, each fastener disposed about an axis and having a head at a rear end, a tip extending from the forward end and a shank extending from below the head to the tip about the axis,
- threads formed about the axis,
- the threads having a forward portion and a rear portion, the threads over the forward portion being of larger size than the threads over the rear portion,
- the threads over the forward thread portion and rear thread portion, comprising segments of the same helix about the shank of constant pitch,
- the holding strip holding the fasteners in a row and spaced side-by-side relation with the axis of the fasteners in a common plane and the rear thread portion of each screw in threaded engagement with the holding strip,
- the holding strip having where it engages each fastener a reduced strength portion such that a fastener being threaded tip first into a workpiece is automatically separated from the holding strip while maintaining a length of the strip substantially intact and while guiding the fastener by threaded engagement of the second thread portion of the fastener in the holding strip.
A threaded fastener disposed about an axis and having a head at a rear end, a tip extending from the forward end and a shank extending from below the head to the tip about the axis,
- threads formed about the axis,
- the threads having a forward portion and a rear portion, the threads over the forward portion being of larger size than the threads over the rear portion.
Dependencies are inferred from the claim text.