Title: Apparatus for producing drill screws

Abstract: The method includes positioning a plurality of rotary milling saw stations about a path of travel for successsive screw blanks. Two longitudinally overlapping fluting cuts are made on each side of each blank to configure a drilling point. The blanks are rotated about their axis a predetermined amount, during travel between work stations, to expose the appropriate peripheral surface of the blank to the appropriate work station. The method and apparatus described in the invention is capable of producing a drill screw with relatively long flutes behind the cutting edges while not appreciably weakening the point structure. The turret carrying the blanks is intermittently indexed in timed relationship with the activation of the milling saw, the work stations and means to clamp the blanks at the work stations.

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Inventors: Baer, Martin A. (Niles, IL, US)

Application Number: 851238
Filing Date: 1977-11-14
Publication_date: 1979-02-13
Assignee: Illinois Tool Works Inc. (Chicago, IL)
Primary Class(es): 470/58 470/65, 470/161
Other Classes:
US Patent Ref:

2479730	Aug, 1949	Dewar	85/47.
2590597	Mar, 1952	Brown	10/20.
2982978	May, 1961	Wilson	10/20.
3085264	Apr, 1963	Stern	10/20.
3164851	Jan, 1965	Hanneman	10/20.
3280412	Oct, 1966	Hanneman et al.	10/20.
3422472	Jan, 1969	Pomernacki	10/6.
3585665	Jun, 1971	Jackson	10/6.
3780389	Dec, 1973	Lindstrom	10/10.
3933075	Jan, 1976	Peterson	85/41.

Other Refs:
Primary Examiner: Combs, E. M.
Assistant Examiner:
Attorney: Buckman; Thomas W., Beart; Robert W.