# US 4,392,516 A · Drive for loom easer bar

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- Number: US 4,392,516 A
- Document ID: US4392516A
- Status: Granted
- Kind: A
- Application number: 06/270,552
- Filed: 1981-06-04
- Granted: 1983-07-12
- Earliest claimed: 1981-06-04
- Assignees: Burlington Industries, Inc.
- Inventors: Douglas D. Goodnough
- Web page: https://patentgrep.com/patent/US4392516A

## CPC

- D03C 7/00: Leno or similar shedding mechanisms
- D03D 49/04: Control of the tension in warp or cloth
- D03C: SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03D: WOVEN FABRICS; METHODS OF WEAVING; LOOMS

## Abstract

An easer bar for controlling the tension of the warp threads in a loom controlled by a positive action dobby for weaving leno type fabrics is directly controlled by and connected to the dobby.

## Claims

### Claim 1

In a weaving machine having a frame, a top leno warp beam and a bottom ground warp beam, and a positive-motion dobby, the combination comprising:
easer-beam means overlying the top beam warp threads at the juncture of their vertical and their horizontal run;
crank arm means mounting said easer-bar means to the frame for rocking movement toward and away from the top beam warp threads to respectively increase and decrease the tension in the top beam warp threads; and
mechanical means devoid of spring means mounted to the frame and connecting said easer-bar mounting means to the dobby for positively rocking said easer bar toward and away from the top beam warp threads in response to predetermined movements of the dobby.

### Claim 2 (depends on 1)

The structure defined in claim 1 wherein the easer-bar means includes a roller which contacts the top beam warp threads.

### Claim 3 (depends on 1)

The structure defined in claim 1 wherein the mechanical means includes:
an oscillatory shaft mounted to the frame above and parallel to the easer-bar means;
first rod and crank means connecting said shaft to the easer-bar mounting means for rocking said easer-bar on oscillation of said shaft;
oscillatory double arm crank means mounted to the frame below the horizontal run of the top beam warp threads;
second rod and crank means connecting said shaft to one arm of said double-arm crank means for oscillation of said shaft on oscillation of said double-arm crank means; and
rod means connecting the other arm of said double-arm crank means to the dobby.

### Claim 4 (depends on 3)

The structure defined in claim 3 wherein there are:
two crank arm means mounting the easer-bar means, one at each end thereof;
two first rod and crank means, one connected to each of said two crank arm means;
two double-arm crank means, one at each side of the machine, both mounted for oscillation about parallel axes located in planes normal to the shaft;
two second rod and crank means, each connecting said shaft to one arm of one of said double-arm crank means;
rod means connecting the other arms of said two double-arm crank means; and wherein
the rod means recited in claim 3 connects the other arm of one of said double-arm crank means to the dobby.

### Claim 5

In a weaving machine having a frame, leno and ground warp ends, and a positive-motion dobby, the combination comprising:
easer-bar means overlying the leno warp threads;
crank arm means mounting said easer-bar means to the frame for rocking movement toward and away from the leno warp threads to respectively increase and decrease the tension on the leno warp threads; and
mechanical means mounted to the frame and connecting said easer-bar mounting means devoid of spring means to the dobby for positively rocking said easer bar toward and away from the leno warp threads in response to predetermined movements of the dobby.