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US 4,391,021 AGranted
Apron drafting system
AssigneeWhitin Roberts Company
InventorFouad A. Kamel
Life of this patent
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AssigneeWhitin Roberts Company
InventorFouad A. Kamel
Estimating the term…
An apron drafting system for textile fibers includes a pair of front rolls, a pair of middle rolls, and a pair of back rolls defining front and back drafting zones therebetween. A cradle, including a pair of side plates, is mounted on both of said middle rolls and extends towards both said front rolls and said back rolls to support a pair of front apron pins adjacent the front rolls and a pair of back aprons pins adjacent the back rolls. Top and bottom aprons extend over the middle rolls and over the apron pins adjacent both the front and back rolls to make adjacent contact to guide the textile fibers from a point immediately adjacent the back rolls, through the nip between the middle rolls, to a point adjacent the front rolls. The cradle also includes a pair of platform members, one in the front drafting zone and another in the back drafting zone, which serve to deflect the top and bottom aprons where they are in abutting contact out of the normal path between the rolls to provide improved control over the textile fibers while in the drafting zones.
A drafting apparatus for textile fibers comprising a pair of back rolls, a pair of middle rolls, and a pair of front rolls, each of said pairs of rolls including a top roll and a bottom roll, a cradle supported on said middle rolls and including a pair of side plates, a top apron extending around said top middle roll between said side plates, a bottom apron extending around said bottom middle roll between said side plates, said cradle including a pair of front apron pins in the front drafting zone between said front and middle rolls, said cradle including a pair of back apron pins in the back drafting zone between said back and middle rolls, said top apron extending around the top ones of said front and back apron pins, said bottom apron extending around the bottom ones of said front and back apron pins, whereby said top and bottom aprons extend in confronting relationship from said back apron pins through the nip between said middle rolls and to said front apron pins to control the textile fibers in abutting contact in both the back and front drafting zones.
A drafting apparatus for textile fibers comprising a pair of back rolls, a pair of middle rolls, and a pair of front rolls, each of said pairs of rolls including a top roll and a bottom roll, a top apron extending around said top middle roll, a bottom apron extending around said bottom middle roll, a pair of front apron deflecting pins in the front drafting zone between said front and middle rolls, one of said front pins engaging said top apron and the other of said front pins engaging said bottom apron, a pair of back apron deflecting pins in the back drafting zone between said back and middle rolls, one of said back pins engaging said top apron and the other of said back pins engaging said bottom apron, said front and back pair of apron pins holding said aprons in confronting relationship from said back apron pins through the nip between said middle rolls to said front apron pins to control the textile fibers in abutting contact in both the front and back drafting zones, a front platform in said front drafting zone to deflect said top and bottom aprons in abutting contact out of the plane defined by said front and back apron deflecting pins, and a back platform in said back drafting zone to deflect said top and bottom aprons in abutting contact out of the plane defined by said front and back apron deflecting pins.
A cradle assembly for supporting and guiding a pair of aprons in a drafting system which includes a top roll and a bottom roll, said cradle comprising a pair of side plates, means securing said side plates as a unit in spaced, parallel positions, each of said side plates having a recess on the lower side to receive said bottom roll and position said cradle with respect thereto, each of said side plates having a recess on the upper side to receive said top roll and position said cradle with respect thereto, said side plates extending laterally from said recesses on both sides thereof, a first pair of upper and lower apron deflecting pins mounted on said side plates at one side of said recesses, a second pair of upper and lower apron deflecting pins mounted on said side plates on the other side of said recesses, a top apron extending around said upper apron pins, and a bottom apron extending around said lower apron pins, whereby said top and bottom aprons extend in close abutting contact between said first and second pairs of apron pins.
Dependencies are inferred from the claim text.