About: In a sand papering machine, the combinations with the holder and the bed supporting the material to be sand papered, of a holder for the sand paper, composed of a box or frame carrying inner and outerly plates and means for moving the plates against an interposed block of flexible substance, and against interposed portions of the sand paper, respectively, the said holder being adapted to slide on a frame, and means for reciprocating the holder along the said frame, substantially as shown and described.     Permalink

an Entity references as follows: