The following represent useful links to websites in the area of machinery safety and manufacturing safety:
OSHA CFR 1910 Regulations
Hazard Communications Systems (a supplier of Safety Labels)
CEMA - The Conveyor Equipment Manufacturing Association, with good info on conveyor safety
IHS - A good supplier of technical standards (such as ANSI standards)
Techstreet - Another good supplier of technical standards (such as ANSI Standards)
Oregon Health & Safety University - A good source of relevant Manufacturing Safety info.