Document Type and Number:
Japanese Patent JPS5256847
Kind Code:
Y2
Application Number:
JP14845372U
Publication Date:
December 22, 1977
Filing Date:
December 28, 1972
Export Citation:
International Classes:
G03B1/18; B65H20/20; G03B23/00; G03B31/00; G03B31/06; (IPC1-7): G03B23/00