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US 5,033,345 AGranted
High-speed cutter for aramids
AssigneeE. I. Du Pont de Nemours and Company
InventorTadeusz E. Schnitzer
Life of this patent
Estimating the term…
Abstract
An automatic yarn cutting apparatus comprising a cutter body, actuating means, valve means, and cutting means whereby the cutting mechanism is actuated by tensioned yarn passing over the actuator arm and through the cutting slot.
Claims15
A yarn cutter, comprising
- (a) a cutter body containing a bore therethrough with a slot extending transversely from a side of the cutter body through the bore to a slot bottom, the slot adapted to receive a yarn;
- (b) an actuator means pivotably attached to the cutter body and comprising;
- (i) a yarn contact surface on the actuator means adjacent the bottom of the slot, wherein a force exerted on the yarn contact surface by contacting yarn received in the slot causes the actuator means to pivot, and
- (ii) a valve shifting means attached to the actuator;
- (c) a valve means attached to the cutter body adjacent a first end of the bore and adapted to be controlled by the valve shifting means, the valve means having a shiftable element adapted to alternately direct a pressurized fluid from a source to the first end of the bore and from the bore to the atmosphere;
- and
- (d) a cutting means adapted to cut the yarn received in the slot, comprising;
- (i) a piston slideably fitted into the bore and adapted to move from a first end of the bore which is in communication with a source of pressurized fluid toward the slot as a result of the valve means directing the pressurized fluid to the first end of the bore;
- (ii) a stationary cutting element affixed to the cutter body adjacent one side of the bore at a side of the slot opposite the first end of the bore;
- (iii) a moveable cutting element affixed to the piston and adapted to pass by the stationary cutting element as the piston moves toward the slot, and
- (iv) a resilient biasing means to urge the stationary cutting element and moveable cutting element, one against the other, with a cutting edge of one cutting element continuously urged against a surface of the other cutting element, in a line to surface contact, thereby cutting the yarn received in the slot as the moveable cutting element passes by the stationary cutting element.
8 more elements
A yarn cutter comprising:
- (a) a cutter body having a slot extending transversely through a bore in the body;
- (i) a stationary cutting element affixed to the cutter body, forming at least one edge of the slot, and located at one surface of the bore;
- (ii) a piston slideably fitted into the bore and adapted to move from a first end of the bore which is in communication with a source of pressurized fluid toward the slot;
- (iii) a moveable cutting element affixed to the piston in contact with the stationary cutting element,
- (iv) a spring biasing means to urge the piston against one end of the bore;
- and
- (v) a resilient biasing means to urge the stationary cutting element and moveable cutting element, one against the other, with a cutting edge of one cutting element continuously urged against a surface of the other cutting element, in a line to surface contact;
- (b) an actuator means pivotably affixed to the cutter body comprising;
- (i) an actuator arm having a yarn contact surface at one end of the cutter body adjacent to the slot, and
- (ii) a valve shifting means at the other end;
- and
- (c) a valve body affixed to the cutter body;
- (i) a valve shiftable element in the valve body located to be controlled by the valve shifting means, and
- (ii) ports in the valve body for selectively directing pressurized fluid from a source into the bore to move the piston against the urging of the spring biasing means.
11 more elements
Dependencies are inferred from the claim text.