Corver : A person who made baskets used in coal mining known as corves.

Source : Ranks, Professions, Occupations & Trades - John Hitchcock

Corf : (k[^o]rf), n.; pl. Corves (k[^o]rvz). [Cf. LG. & D. korf basket, G. korb, fr. L. corbis.]

1. A basket.
2. Mining :
   • A large basket used in carrying or hoisting coal or ore.
   • A wooden frame, sled, or low-wheeled wagon, to convey coal or ore in the mines.

Source: Webster's Revised Unabridged Dictionary (1913)