Two sided abrasive disc with intermediate member

A disposable, flexible, nonvitrified double sided sanding disc for rotatable engagement with a support member having engaging means on one end thereof, said double-sided sanding disc comprising:

• a flexible circular backing member defining a central opening and having two opposed substantially circular planar surfaces each having abrasive material permanently affixed directly to and only on both said circular planar surfaces prior to use;
• and
• a portion of said central opening lying substantially between said two planar surfaces having means engagable with engaging means on one end of a support member for supporting said sanding disc and transmitting rotational movement from said support member to said sanding disc whereby said sanding disc can be detachable connected to said support member by the locking member so that both abrasive surfaces can be used for finishing an article.

A disposable, flexible, non-vitrified double-sided sanding disc, for rotatable engagement with a support member having engaging means on one end thereof, said double-sided sanding disc having two opposed abrasive finishing surfaces comprising:

• flexible circular backing means defining a central opening and having two opposed substantial circular planar surfaces each having abrasive material permanently affixed directly to and only on both said circular planar surfaces;
• and
• an intermediate member, defining a central bore, being positioned in said central opening and being attached to said backing means, said central bore and said central opening being coaxial with one another, a portion of said central bore being engagable with engaging means on one end of a support member for transmitting rotational movement from said support member to said sanding disc wherein said engagable portion of said central bore lies substantially between said two planar surfaces and has means therein permitting a threaded portion to be formed by engagement with said engaging means whereby said sanding disc can be detachably connected to said support member by said intermediate member so that both abrasive surfaces can be used for finishing an article.