PROTECTIVE MASK Russian patent published in 1996 - IPC

FIELD: protection in welding operations. SUBSTANCE: mask is provided with housing, frame with light filter, head band with its front part carrying pipe made of air-proof material which is connected by air pipeline with system for air supply behind mask. Both ends of pipe are coupled through tee- piece with air supply system, and holes for bringing air behind mask are made in side surfaces of pipe in two rows so that number of holes in upper row is twice larger than in lower row. Besides, pipe is provided with lip and can be made of rigid material with soft fixing elements. EFFECT: high efficiency. 2 cl, 2 dwg