Sewing – Special machines – Buttonhole
Patent
1977-08-08
1979-01-02
Feldbaum, Ronald
Sewing
Special machines
Buttonhole
112 80, D05C 1500, D05C 1506
Patent
active
041321820
ABSTRACT:
A tufting machine for forming loop or cut pile tufts in a backing material from at least one continuous strand of yarn. A hollow channel-like needle having a yarn entrance opening is reciprocally inserted through the backing material after which a plunger having a rounded end pushes a length of yarn through the opening in the backing while pulling yarn through the needle and needle opening. A cutting blade, slidingly supported between the needle and plunger, is then reciprocated outwardly to cut the formed loop. The machine may be adjusted to leave the formed loops uncut and/or to change the height of the loop or cut pile tufts. The needle, cutting blade and plunger are rigidly mounted on slide bars slidably mounted on the exterior of a rigid, rectangular cross-section, support arm and are reciprocally driven in timed relationship by an electric motor and pivot crank arrangement. The yarn is positively clamped and held on both sides of the needle during loop formation and cutting by yarn-holding mechanisms to form loops and cut pile of precise, even height across the backing.
REFERENCES:
patent: 1958556 (1934-05-01), White
patent: 2057920 (1936-10-01), Rose
patent: 2078258 (1937-04-01), Lundgren
patent: 3142270 (1964-07-01), Schauer
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