Variable pitch feed of fasteners

Elongated-member-driving apparatus – With means to shape work or cut product – Means to form opening in work for member

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B23D 1700, B65C 506

Patent

active

050764802

ABSTRACT:
Variable pitch feed of fasteners by a unitary, single toothed feed pawl. In a first embodiment, back-up of the fasteners is prevented using a downwardly pointed detent tooth which bits into a secondary runner bar of the fastener assemblage, preferably at a point somewhat beyond the fastener ejection axis. In a second embodiment, the secondary runner bar includes a series of lands spaced at the same pitch as the fasteners, and the detent comprises a pin biased toward the runner bar to intermittently engage the lands. Back-up of the fastener assemblage is prevented by the detent, and individual fasteners are securely positioned for ejection.

REFERENCES:
patent: 4310902 (1982-01-01), Suzuki
patent: 4456462 (1984-06-01), Furutso
patent: 4461417 (1984-06-01), Furutsu
patent: 4465218 (1984-08-01), Furujsu
patent: 4482087 (1984-11-01), Furutsu
patent: 4538754 (1985-09-01), Furutsu
patent: 4651913 (1987-03-01), Bone

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