10 SAFETY CODE FOR RUBBER MILLS AND CALENDERS 
OPERATING RULES 
Rule 150. 
Safety stops on mills and calenders should be tested daily, and 
accurate measurements of distance of travel shall be taken at least 
once every thirty (30) days. 
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ROLL SPEED -~ FEET PER MINUTE 
CHART TO SHOW STOPPING DISTANCE FOR VARIOUS SPEEDS 
PART 2.—DISCUSSION 
It is realized that the quick stopping of mills and calenders is a 
very important factor in accident prevention in that it limits the 
injury to a worker if caught between the rolls. At the present time, 
due to the different type of drives and controls for stopping, there 
is a wide variation in the distance that a roll will travel after the 
safety trip has been operated. 
Some form of braking device is absolutely necessary. With stock 
in the mill or calender the stop is much quicker than when the mill 
or calender is running empty, but in order to have a standard condi- 
tion for testing and comparison it is necessary to make tests for quick 
stopping with all the equipment running empty. 
A great many tests have been made to determine the distance a roll 
will travel after the safety control is operated, and the rules given 
herein show what may reasonably be expected with average good con- 
ditions and with as quick a stop as can be obtained without seriously 
jarring the machinery or breaking some part of the equipment.