Patent ID: 6880249

Claim:
In combination: a toroidal rotary knife blade having a sharpened circular lower edge and an upper blade holder engagement section including at least one upper projecting portion adapted to be engaged and secured by a blade holder; and a blade holder for said toroidal rotary knife blade, said blade holder including; a generally toroidal blade holding ring having an upper gear-engaging section including a plurality of gear teeth formed thereon for intermeshing with a drive means and a lower blade engagement and retention section adapted to receive and retain said toroidal rotary knife blade therein, said lower blade engagement and retention section further including at least one blade projection engagement and securement means operative to securely engage and retain said at least one upper projecting portion of said rotary knife blade therein, said at least one blade projection engagement and securement means operative to prevent substantially all movement of said rotary knife blade relative to said blade holding ring; said generally toroidal blade holding ring being constructed of material selected from the group consisting of plastic, polyvinyl chloride, polyethylene, polypropylene, polystyrene, vinyl, and polyethylene terephthalate; and said generally toroidal blade holding ring operative to reduce noise and vibration emitted therefrom during rotation of said generally toroidal blade holding ring by a drive means.