SAFETY CODE FOR RUBBER MILLS AND CALENDERS 
(3) In dry grinding processes similar in character to the above 
and where the machine is fed through a long trough—as, for in- 
stance, from an upper floor level —the foregoing rules 110 to 112, 
inclusive, will not apply,-provided the trough is so designed and is 
of such a character that 1t is impossible for an operator in any man- 
ner to come in contact with the bite of the rolls. 
Rule 120. Safety-trip control—Calenders. 
(a) A safety-trip rod or a tight-wire cable shall be provided 
across the front and the back of all calenders, extending the length 
of face of rolls, to operate sensitively if it is pushed or if it is pulled. 
This rod shall be at a height not more than sixty-nine (69) inches 
above the working floor level or platform on which the operator 
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stands and shall be within easy reach, with provision made for ad- 
justment either up or down of three (3) inches in each direction. 
(See illustration No. 2.) 
(6) On each side of all calenders and near both ends of the face 
of the roll there shall be a vertical tight-wire cable connecting with 
the bar tipping mechanism at the top and fastened to the frame 
within twelve (12) inches of the floor. These cables should be posi- 
tioned at a distance of not more than twelve (12) inches from the 
face of the roll and at a distance of not less than one (1) inch from 
calender frame. (See illustrations Nos. 2 and 2A.) 
Rule 121. 
At the bite of in-running rolls where sheeting, duck, or other fab- 
re is fed. a barrier should be placed across the full length of the