Low inertia shoe machine tool support

Claim 1

A machine for roughing the margin of an upper of a shoe assembly mounted on a movable shoe assembly support, said shoe assembly including a last having an insole located on its bottom and an upper mounted thereon having its margin secured to the periphery of the insole, said machine comprising: a rotary roughing tool supported by a tool supporting means, said tool supporting means comprising a carrier movable towards and away from said shoe support, said roughing tool comprising a roughing brush; said tool support carried by said carrier being movable relative thereto wherein a tool supported thereby can be moved in a direction heightwise of the bottom of said shoe assembly and follow the plan shape of the bottom of said shoe assembly, to operate progressively along the marginal portion of the shoe bottom; an adjustable resilient means which functions with said tool support to urge said tool into engagement with the bottom of said shoe, wherein movement of said tool in a direction heightwise of said shoe bottom and relative to said carrier is determined by said engagement of said tool with said shoe bottom, the movement varying according to the contour of said shoe bottom, the heightwise position of said carrier with respect to said shoe support being generally constant; said resilient means including a double piston arrangement comprising an upper piston and a lower piston, each having bleed holes through which hydraulic fluid may pass; and a drive means for effecting rotation of said roughing tool comprising a rotary drive member supported on said carrier, a second rotary member on a shaft, on which shaft a tool can be mounted, and an endless drive member interconnecting said rotary members.