Tufting machine hook

Details Tufting machine hook Tufting machine hook

1985-11-08

1986-07-29

Feldbaum, Ronald

Sewing

Special machines

Embroidering

D05C 1500

Patent

active

046025766

ABSTRACT:
A hook for a tufting machine has an inclined ramp ground on the shank of the hook adjacent the throat. The ramp acts as a cam surface as a knife oscillates into and out of cutting engagement with the cutting edge of the blade of the hook. The cam surface permits the tension between the knife and the hook to be increased substantially relative to the prior art by preventing "heeling" of the knife against the hook when the tension is increased. As the knife slides up the ramp the tension between the knife and the hook actually increases. An additional incline is further disclosed along the ledger portion of the hook adjacent the throat and is sloped so as to provide the ledger portion of the hook equally between the surfaces of the hook so as to prevent "J" cutting as the knife cuts loops in conjunction with the ledger blade.

REFERENCES:
patent: 4155318 (1979-05-01), Yamamoto
patent: 4397249 (1983-08-01), Slattery
patent: 4557209 (1985-12-01), Watkins

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