California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 7 - General Industry Safety Orders
Group 8 - Points of Operation and Other Hazardous Parts of Machinery
Article 71 - Rubber and Composition Working Machines
Section 4580 - Calender Rolls (Not Paper)

(a) Safety trip devices, located not more than 72 inches nor less than 66 inches above the working floor or platform, shall be provided across the front and back of all calenders. The devices shall extend the full length of the face of the rolls and be designed to initiate instantly the process of stopping the calendar when either pushed or pulled.

(b) On each side of all calenders near both ends of the face of the roll there shall be a vertical tight wire cable connecting with the bar tripping mechanism at the top and fastened to the frame within 12 inches of the floor and at a distance of not less than one inch from calender frame.

(c) At the "bite" of in-running open rolls where sheeting, duck or other fabric is fed by hand, a safety bar or cable, connected to the stopping device, shall be placed across the full length of the face of the rolls. It shall be so located that the operator's fingers will trip the stopping device before coming into contact with the bite.

(d) Calender equipment such as windups, idler rolls and cooling drums shall be provided with a safety trip device by which the operator can disconnect the power and stop the equipment in case of emergency.

(e) Mechanical and electrical equipment and auxiliaries shall be installed in accordance with this section and the Electrical Safety Orders.

(f) Safety devices listed in this section shall not be required when a calender is so installed that persons cannot normally reach through, over, under, or around to come in contact with the roll bite or be caught between a roll and an adjacent object.

(g) All trip and emergency switches shall require manual resetting.