Control mechanism for stuffer crimper

Claim 2

Apparatus as set forth in claim 1 in which said yieldable means comprises a weight adapted to hold said arm in pressure engagement with said core.

Claim 3

Apparatus as set forth in claim 3 in which said weight is adjustable for varying the pressure of said arm against the core.

Claim 4

Apparatus for crimping yarn comprising a crimping chamber having input and discharge ends and means including a feed roll disposed to feed yarn into the input end of said chamber to be folded over and crimped against a core of previously crimped yarn held compacted in said chamber, means driving said feed roll comprising a driving pulley having at least two steps and a continuously driven driving belt in driving engagement with said pulley, and means responsive to variations in the quantity of crimped yarn in said core connected to shift said belt between said steps for varying the speed of said feed roll between two predetermined rates in a sense to maintain said quantity substantially constant.

Claim 5

A stuffer crimper comprising a chamber having inlet and discharge ends, feed rolls disposed to feed a yarn into the inlet end of said chamber to be folded over and crimped against the core of previously crimped yarn in said chamber, a cooling cage disposed in alignment with said chamber and adapted to receive the crimped core from said discharge end, said cage comprising a series of rods spaced around the periphery of said chamber at the discharge end thereof with their inner surfaces forming a continuation of said chamber and adapted to confine said core as it is discharged from said chamber and advances along said rods, a choke member disposed to compress and compact said core at a point in advance of the discharge end thereof for impeding the advance of said core and controlling the back pressure on the core between said choke member and said feed rolls, said choke member comprising spaced pivoted fingers disposed to extend between said rods into engagement with said core into contact with a side of said core, yieldable means holding said fingers in pressure engagement with said core, sensing means spaced beyond said choke member to sense the position of the discharge end of said core and to be actuated thereby, means withdrawing the crimped yarn from said core at said discharge end and means responsive to said sensing means to control the relative rate s of feed into and withdrawal from said chamber in a sense to maintain the discharge end of said core at a substantially constant level.

Claim 6

Apparatus as set forth in claim 6 in which said fingers are provided with fluid passages having discharge openings positioned to apply a treating liquid to the contacting surface of said core.

Claim 7

Apparatus as set forth in claim 6 including a series of nozzles positioned above said fingers in the direction of advance of said coRe and adapted to apply a treating liquid to the sides of said core in the zone between said fingers and the point of withdrawal of the yarn.