What is the meaning of Pelti?

sheet metal (metal worked into a thin, flat sheet, used as a material)

plate (flat, flexible, metallic object of uniform thickness; a part made of sheet metal)

sheet, baking sheet (flat metal pan used for baking in oven)

damper (valve or movable plate in the flue duct of a stove, furnace, etc., used to regulate the draught of air)

Source: wiktionary.org