shaft 18 and a u shaped cement nozzle 20 thereon shown in dashed lines in fig2 the insole support plate mechanism 10 comprises a pair of frame members 22 and 24 arranged in parallel planes bolted to both sides of the housing 12 as shown in fig1 an insole support plate 26 is arranged generally above the nozzle 20 and which plate 26 is attached to the distal end of a forward support arm 28 the forward support arm 28 is arranged to be slidably movable along its longitudinal axis between the parallel frame members 22 and 24 a pair of first pivot arms 30 and 32 are disposed outwardly of the frame members 22 and 24 and are connected at their forward ends by an axis 34 which extends through an elongated slot 36 in both the frame members 22 and 24 which slot 36 is partially shown in fig3 the axis 34 is secured to a heelward portion of the forward support arm 28 a second pivot member 40 has its heelward end journalled on an axis 42 the second pivot member 40 is also secured to the parallel frame members 22 and 24 the first pivot arms 30 and 32 at their heelward ends are pivotally connected by a common axis 44 to the forward end of the second pivot member 40 one pivot arm 30 has an extension 46 extending from the distal end thereof the extension 46 having an adjustable bolt 48 threadably received therethrough an actuatable control switch 50 is secured to the side of the frame member 22 and is.