| 摘要 |
An improved and specialized type of construction for an abrasive drum of the type in which a plurality of abrasive packs are mounted in uniform circumferential spacing around the entire cylindrical surface of a central hub, the hub being provided with longitudinal mounting slots, one for each pack. The abrasive drum of the invention combines a hub construction in which the slot sidewalls diverge continuously from a relatively wide slot opening, with abrasive packs, each of which is comprised of a number of abrasive strips joined at their base edge to form a substantially flat base seating on the cylindrical surface of the drum; and each pack is provided with a resiliently deformable plastic retainer which is molded in cross section to provide an anchoring rod portion retained in said slot by said slot sidewalls, and a radial web portion extending from said rod into said pack of abrasive strips, said rod having a transverse dimension substantially less than the width of said slot to permit hinge action of said packs on said hub during rotation of said abrasive drum.
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