A new solution

for an old problem…

Does your mine have

this problem? If it

does, you need to get

the Ker<><Thob

implemented into

your roof control

plan!

Ker<><Thobs can be put directly over beltlines.

Ker<><Thob

Application

&

Installation Process

Any steel pipe, stronger than the roof bolt can be used with the Ker<><Thob, as long as it’s inside diameter is between (2.125 to 2.6 inches for our 2 1/8 inch unit) or (2.25 to 3 inches for our 2 1/4 inch unit).

One miner can carry a temporary roof jack, a shoulder bag containing a few Ker<><Thobs, two channel locks, and a selection of pipe cut to different lengths. This is all that is needed to allow one man to repair several loosened roof bolt plates.

Make the area

safe before

proceeding to

install the

Ker<><Thob.

Install temporary supports! Do not work under unsupported roof.

Raise the loosened

roof plate up to

the roof and

measure the

distance from the

plate to the flange

of the bolt head.

Subtract two inches from the measurement

to get the correct length of pipe needed

to be used with the Ker<><Thob. (5”– 2” = 3”) pipe length needed

Select the

precut pipe

from the

shoulder bag.

Set the split halves of the Ker<><Thob onto the flange of the bolt head.

Make sure that the notched ends of the split halves are resting on the flange of the bolt head!

Slide the spacer

pipe over the

bolt head and

the split halves.

Start the nut up over the bolt head and thread onto the split halves.

Push the spacer pipe against the split halves to aid in the threading of the nut onto the unit.

Grasp the notched end of the split halves while tightening the nut.

Two Channellock Pliers (one 420 and one 460), and a tape measure are the only tools needed for the installation of a Ker<><Thob!

The Ker<><Thob was tested by MSHA on 10/3/96 and 9/3/97. Both times it was subjected up to 60,800 pounds of pressure with no failure.

Phones: 618-599-7447 or 618-375-7503

Fax: 618-378-2002

Mailing Address: Ker<><Thob Inc.

P.O. Box 317

Norris City, IL 62869

CONSOLIDATION COAL CO. (REND LAKE, 2186 NORTH KEYSTONE LANE / NASON, IL. 62886)

DAKOTA MINE (Rt 85 / BOBWHITE, WV. 25028)

EASTERN ASSOCIATED COAL CORP. (HARRIS MINE ,ROUTE 85 / BALD KNOB, WV. 25010-0085)

PINE RIDGE COAL COMPANY (PO BOX 104, STATE RT. 5 / PRENTER, WV. 25181-0104)

TRIAD MINING (RT 1-HC70, LAUREL LAKE ROAD / LENORE, WV 25676)

TRIUNE INC. (2328 I-70 FRONTAGE ROAD / GRAND JUNCTION, CO. 81505)

UNITED CENTRAL SUPPLY (1800 SUPPLY ROAD / CARTERVILLE, IL. 62918)

WABASH MINE HOLDING CO. (7534 N. 900 BLVD. / KEENSBURG, IL. 62852-0144)

ARCH IL, CONAN MINE (PICKNEYVILLE, IL)

BANKS MILLER SUPPLY CO. (14731 HWY 40 W. / TOMAHAWK, KY)

BLACK BEAUTY UNDERGROUND, INC. (AIR QUALITY #1, P.O. BOX 176 / WHEATLAND, IN)

Ker<><Thob’s Users List:

PEN COAL CORP. (ROUTE 1, McCOMAS ROAD / DUNLOW, WV 25511)

MARFORK COAL CO. (ROUTE 3, MARFORK ROAD / PETTUS, WV 25209)

NATIONAL MINE SUPPLY (451 RAGLAND ROAD / BECKLEY, WV 25801)

PHILLIPI DEVELOPMET CO. (RT. 3, BOX 146 / PHILLIPI, WV 26416)

TALL TIMBER COAL CO. (P.O. BOX 722 / MATEWAN, WV 25678)

TURRIS COAL CO. (P.O. BOX 21 / ELKHART, IL 62634)

WHITE COUNTY COAL CORP. (P.O. BOX 457 / CARMI, IL 62821)

BILL MOORE ASSOCIATES (6246 CAROLYN DR. / MENTOR, OH 44060)

SOLAR SOURCES, MONROE CITY MINE (P.O. BOX 325 / MONROE CITY, IN 47577)

ELK RUN COAL CO., WHITE KNIGHT MINE (P.O. BOX 497 / SYLVESTER, WV 25193)

BOONES RESOURCES, INC (P.O. BOX 1056 / PELHAM, AL 35124)

FREEMAN UNITED (P.O. BOX 347, IL RT. 4 / VIRDEN, IL 62960)

THE AMERICAN COAL CO. (9085 HIGHWAY 34 NORTH / GALATIA, IL 62935)

Ker<><Thob’s Users List Continued:

Thank you for your

interest in

Ker<><Thobs!