Pressure shoes; backing belts

Full Title

Machines or devices using grinding or polishing belts (for sharpening cutting edges of tools B24B3/00; portable belt-grinding machines B24B23/06); Accessories therefor > for grinding plane surfaces > involving members with limited contact area pressing the belt against the work, e.g. shoes sweeping across the whole area to be ground (B24B21/12 takes precedence) > Pressure shoes; backing belts