Canvas held between the contact surfaces oil paintings of the clamping bars withdraws between the contact surfaces as the canvas is extended into a stretched state over and against the frame. The stretcher bar drive means may include adjustment means to change the distance to which the stretcher bar extends over the frame.
Preferably, control means are provided comprising hand-painted oil painting a control unit connected to an air supply and two toggle switches, operable to activate the clamping drive means and the stretcher bar drive means respectively.
According to a second aspect of the invention, there cheap oil paintings is a provided an apparatus for applying canvas to a frame comprising a surface for supporting a sheet of canvas and a frame, a pair of parallel clamp members operable to engage side edges of the frame and stretch the canvas over the edge of the frame to tighten it and to retain the canvas in its stretched state to enable the canvas to be secured to the frame.
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