Pin bar doff knife

Details Pin bar doff knife Pin bar doff knife

1993-01-29

1994-12-20

Phan, Hien H.

Severing by tearing or breaking

Breaking or tearing apparatus

Including means to apply thermal shock to work

225 97, B26F 302

Patent

active

053739817

ABSTRACT:
An apparatus and method for cleanly and consistently cutting certain nonwoven fabrics, specifically spunlaced fabrics. The apparatus comprises a pin bar doff knife having one or more rows of closely-spaced, pointed, parallel pins attached perpendicularly to a bar. When the pin bar doff knife is tensioned against a spunlaced fabric to be cut, the pins act to disentangle individual fibers making up the fabric. The result is a very clean fabric cut when used on either lightweight or heavyweight spunlaced fabrics. In particular, the pin bar doff knife produces consistent cuts in heavyweight spunlaced fabrics made of polyester fibers and/or aramid fibers having very high fiber stiffness.

REFERENCES:
patent: 3231164 (1966-01-01), Seidler
patent: 3369435 (1968-02-01), Boultinghouse
patent: 3485706 (1969-12-01), Evans
patent: 3526349 (1970-09-01), Moro
patent: 3536238 (1970-10-01), Iwama et al.

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