Sharpener for cut-off having a helical knife
AssigneeMolins Limited
InventorPhilip Arthur Maw
Life of this patent
Estimating the term…
Abstract
A cut-off mechanism for a cigarette or other similar continuous rod making machine comprises a rotating helical knife and a sharpening device for sharpening the knife, characterized in that the sharpening device comprises two rotary sharpening members arranged to act on opposite sides of the knife, the sharpening members both being carried by a rotary member which rotates about an axis substantially parallel to the axes of rotation of the sharpening members, and each sharpening member being adjustable in regard to its distance from the axis of the rotary member, at least one of the sharpening members being driven by engagement of a rim on the sharpening member with an intermediate wheel which also engages a stationary ring which is coaxial with the rotary member.
Claims12
A cut-off mechanism for a cigarette or other similar continuous rod making machine, comprising a rotating helical knife and a sharpening device for sharpening the knife, characterised in that the sharpening device comprises two rotary sharpening members arranged to act on opposite sides of the knife, the sharpening members both being carried by a rotary member which rotates about an axis substantially parallel to the axes of rotation of the sharpening members, and each sharpening member being adjustable in regard to its distance from the axis of rotary member, at least one of the sharpening members being driven by engagement of a rim on the sharpening member with a movable drive transmitting idler wheel which is mounted for rotation about an axis spaced from that of the said sharpening member and which also engages a stationary ring coaxial with the rotary member.
A cut-off mechanism for a cigarette or other similar continuous rod making machine, comprising a rotating helical knife rotating at a predetermined speed, and a sharpening device for sharpening the knife, characterised in that the sharpening device comprises a rotary member, means for driving the rotary member at a speed which is a submultiple of the speed of the knife whereby the knife is sharpened once during every predetermined number of revolutions, two rotary sharpening members mounted for rotation on the rotary member about axes spaced from and substantially parallel to the axis of rotation of the rotary member, each sharpening member being adjustable in regard to its distance from the axis of the rotary members, at least one of the sharpening members being driven by engagement of a rim on the sharpening member with a movable drive transmitting idler wheel which is mounted for rotation about an axis spaced from that of the said sharpening member and which also engages a stationary ring which is coaxial with the rotary member, being urged by centrifugal force during use into engagement between the ring and the rim of the sharpening member.
Dependencies are inferred from the claim text.