Tufting machines and knife blocks therefor

Details Tufting machines and knife blocks therefor Tufting machines and knife blocks therefor

1980-02-15

1981-05-12

Feldbaum, Ronald

Sewing

Special machines

Buttonhole

D05C 1500

Patent

active

042664918

ABSTRACT:
A tufting machine has alternate needles extending different lengths from the needle bar to respectively cooperate with hooks set at two different levels in the bed of the machine. Knives act with each hook to cut at least selective loops. The knives are mounted in knife blocks in pairs with each pair cooperating with a pair of adjacent hooks. Each knife block has a pair of knife receiving channels on opposite sides of a central web connecting a pair of elongated flanges. The flanges on one side of the web are stepped relatively to that on the other side by an amount substantially equal to the difference in levels between adjacent hooks and the channels are spaced closer together than the corresponding hooks so that both knives extend the same distance from the respective channel to engage the respective hook at the same location with substantially equal pressure.

REFERENCES:
patent: 3604379 (1971-09-01), Cobble
patent: 3662697 (1972-05-01), Passons et al.
patent: 4067270 (1978-01-01), Short

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